/**
* Scissor depends on the scissor box, and the framebuffer dimensions.
*/
static void
update_scissor( struct st_context *st )
{
struct pipe_scissor_state scissor[PIPE_MAX_VIEWPORTS];
const struct gl_context *ctx = st->ctx;
const struct gl_framebuffer *fb = ctx->DrawBuffer;
const unsigned int fb_width = _mesa_geometric_width(fb);
const unsigned int fb_height = _mesa_geometric_height(fb);
GLint miny, maxy;
unsigned i;
bool changed = false;
for (i = 0 ; i < ctx->Const.MaxViewports; i++) {
scissor[i].minx = 0;
scissor[i].miny = 0;
scissor[i].maxx = fb_width;
scissor[i].maxy = fb_height;
if (ctx->Scissor.EnableFlags & (1 << i)) {
/* need to be careful here with xmax or ymax < 0 */
GLint xmax = MAX2(0, ctx->Scissor.ScissorArray[i].X + ctx->Scissor.ScissorArray[i].Width);
GLint ymax = MAX2(0, ctx->Scissor.ScissorArray[i].Y + ctx->Scissor.ScissorArray[i].Height);
if (ctx->Scissor.ScissorArray[i].X > (GLint)scissor[i].minx)
scissor[i].minx = ctx->Scissor.ScissorArray[i].X;
if (ctx->Scissor.ScissorArray[i].Y > (GLint)scissor[i].miny)
scissor[i].miny = ctx->Scissor.ScissorArray[i].Y;
if (xmax < (GLint) scissor[i].maxx)
scissor[i].maxx = xmax;
if (ymax < (GLint) scissor[i].maxy)
scissor[i].maxy = ymax;
/* check for null space */
if (scissor[i].minx >= scissor[i].maxx || scissor[i].miny >= scissor[i].maxy)
scissor[i].minx = scissor[i].miny = scissor[i].maxx = scissor[i].maxy = 0;
}
/* Now invert Y if needed.
* Gallium drivers use the convention Y=0=top for surfaces.
*/
if (st_fb_orientation(fb) == Y_0_TOP) {
miny = fb->Height - scissor[i].maxy;
maxy = fb->Height - scissor[i].miny;
scissor[i].miny = miny;
scissor[i].maxy = maxy;
}
if (memcmp(&scissor[i], &st->state.scissor[i], sizeof(scissor[0])) != 0) {
/* state has changed */
st->state.scissor[i] = scissor[i]; /* struct copy */
changed = true;
}
}
if (changed)
st->pipe->set_scissor_states(st->pipe, 0, ctx->Const.MaxViewports, scissor); /* activate */
}
/**
* Scissor depends on the scissor box, and the framebuffer dimensions.
*/
static void
update_scissor( struct st_context *st )
{
struct pipe_scissor_state scissor;
const struct gl_framebuffer *fb = st->ctx->DrawBuffer;
GLint miny, maxy;
scissor.minx = 0;
scissor.miny = 0;
scissor.maxx = fb->Width;
scissor.maxy = fb->Height;
if (st->ctx->Scissor.Enabled) {
/* need to be careful here with xmax or ymax < 0 */
GLint xmax = MAX2(0, st->ctx->Scissor.X + st->ctx->Scissor.Width);
GLint ymax = MAX2(0, st->ctx->Scissor.Y + st->ctx->Scissor.Height);
if (st->ctx->Scissor.X > (GLint)scissor.minx)
scissor.minx = st->ctx->Scissor.X;
if (st->ctx->Scissor.Y > (GLint)scissor.miny)
scissor.miny = st->ctx->Scissor.Y;
if (xmax < (GLint) scissor.maxx)
scissor.maxx = xmax;
if (ymax < (GLint) scissor.maxy)
scissor.maxy = ymax;
/* check for null space */
if (scissor.minx >= scissor.maxx || scissor.miny >= scissor.maxy)
scissor.minx = scissor.miny = scissor.maxx = scissor.maxy = 0;
}
/* Now invert Y if needed.
* Gallium drivers use the convention Y=0=top for surfaces.
*/
if (st_fb_orientation(fb) == Y_0_TOP) {
miny = fb->Height - scissor.maxy;
maxy = fb->Height - scissor.miny;
scissor.miny = miny;
scissor.maxy = maxy;
}
if (memcmp(&scissor, &st->state.scissor, sizeof(scissor)) != 0) {
/* state has changed */
st->state.scissor = scissor; /* struct copy */
st->pipe->set_scissor_state(st->pipe, &scissor); /* activate */
}
}
/**
* Normally, this function would render a GL_POINT.
*/
static void
rastpos_point(struct draw_stage *stage, struct prim_header *prim)
{
struct rastpos_stage *rs = rastpos_stage(stage);
struct gl_context *ctx = rs->ctx;
struct st_context *st = st_context(ctx);
const GLfloat height = (GLfloat) ctx->DrawBuffer->Height;
const GLuint *outputMapping = st->vertex_result_to_slot;
const GLfloat *pos;
GLuint i;
/* if we get here, we didn't get clipped */
ctx->Current.RasterPosValid = GL_TRUE;
/* update raster pos */
pos = prim->v[0]->data[0];
ctx->Current.RasterPos[0] = pos[0];
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP)
ctx->Current.RasterPos[1] = height - pos[1]; /* invert Y */
else
ctx->Current.RasterPos[1] = pos[1];
ctx->Current.RasterPos[2] = pos[2];
ctx->Current.RasterPos[3] = pos[3];
/* update other raster attribs */
update_attrib(ctx, outputMapping, prim->v[0],
ctx->Current.RasterColor,
VARYING_SLOT_COL0, VERT_ATTRIB_COLOR0);
update_attrib(ctx, outputMapping, prim->v[0],
ctx->Current.RasterSecondaryColor,
VARYING_SLOT_COL1, VERT_ATTRIB_COLOR1);
for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
update_attrib(ctx, outputMapping, prim->v[0],
ctx->Current.RasterTexCoords[i],
VARYING_SLOT_TEX0 + i, VERT_ATTRIB_TEX0 + i);
}
if (ctx->RenderMode == GL_SELECT) {
_mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] );
}
}
/**
* Update the viewport transformation matrix. Depends on:
* - viewport pos/size
* - depthrange
* - window pos/size or FBO size
*/
static void
update_viewport( struct st_context *st )
{
struct gl_context *ctx = st->ctx;
GLfloat yScale, yBias;
int i;
/* _NEW_BUFFERS
*/
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
/* Drawing to a window. The corresponding gallium surface uses
* Y=0=TOP but OpenGL is Y=0=BOTTOM. So we need to invert the viewport.
*/
yScale = -1;
yBias = (GLfloat)ctx->DrawBuffer->Height;
}
else {
/* Drawing to an FBO where Y=0=BOTTOM, like OpenGL - don't invert */
yScale = 1.0;
yBias = 0.0;
}
/* _NEW_VIEWPORT
*/
for (i = 0; i < ctx->Const.MaxViewports; i++)
{
double scale[3], translate[3];
_mesa_get_viewport_xform(ctx, i, scale, translate);
st->state.viewport[i].scale[0] = scale[0];
st->state.viewport[i].scale[1] = scale[1] * yScale;
st->state.viewport[i].scale[2] = scale[2];
st->state.viewport[i].scale[3] = 1.0;
st->state.viewport[i].translate[0] = translate[0];
st->state.viewport[i].translate[1] = translate[1] * yScale + yBias;
st->state.viewport[i].translate[2] = translate[2];
st->state.viewport[i].translate[3] = 0.0;
}
cso_set_viewport(st->cso_context, &st->state.viewport[0]);
if (ctx->Const.MaxViewports > 1)
st->pipe->set_viewport_states(st->pipe, 1, ctx->Const.MaxViewports - 1, &st->state.viewport[1]);
}
/**
* Update the viewport transformation matrix. Depends on:
* - viewport pos/size
* - depthrange
* - window pos/size or FBO size
*/
static void
update_viewport( struct st_context *st )
{
GLcontext *ctx = st->ctx;
GLfloat yScale, yBias;
/* _NEW_BUFFERS
*/
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
yScale = -1;
yBias = (GLfloat)ctx->DrawBuffer->Height;
}
else {
yScale = 1.0;
yBias = 0.0;
}
/* _NEW_VIEWPORT
*/
{
GLfloat x = (GLfloat)ctx->Viewport.X;
GLfloat y = (GLfloat)ctx->Viewport.Y;
GLfloat z = ctx->Viewport.Near;
GLfloat half_width = (GLfloat)ctx->Viewport.Width * 0.5f;
GLfloat half_height = (GLfloat)ctx->Viewport.Height * 0.5f;
GLfloat half_depth = (GLfloat)(ctx->Viewport.Far - ctx->Viewport.Near) * 0.5f;
st->state.viewport.scale[0] = half_width;
st->state.viewport.scale[1] = half_height * yScale;
st->state.viewport.scale[2] = half_depth;
st->state.viewport.scale[3] = 1.0;
st->state.viewport.translate[0] = half_width + x;
st->state.viewport.translate[1] = (half_height + y) * yScale + yBias;
st->state.viewport.translate[2] = half_depth + z;
st->state.viewport.translate[3] = 0.0;
cso_set_viewport(st->cso_context, &st->state.viewport);
}
}
static void
st_BlitFramebuffer(GLcontext *ctx,
GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter)
{
struct st_context *st = ctx->st;
const uint pFilter = ((filter == GL_NEAREST)
? PIPE_TEX_MIPFILTER_NEAREST
: PIPE_TEX_MIPFILTER_LINEAR);
if (mask & GL_COLOR_BUFFER_BIT) {
struct st_renderbuffer *srcRb =
st_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
struct st_renderbuffer *dstRb =
st_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0][0]);
struct pipe_surface *srcSurf = srcRb->surface;
struct pipe_surface *dstSurf = dstRb->surface;
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
/* invert Y */
srcY0 = srcRb->Base.Height - srcY0;
srcY1 = srcRb->Base.Height - srcY1;
dstY0 = dstRb->Base.Height - dstY0;
dstY1 = dstRb->Base.Height - dstY1;
}
util_blit_pixels(st->blit,
srcSurf, srcX0, srcY0, srcX1, srcY1,
dstSurf, dstX0, dstY0, dstX1, dstY1,
0.0, pFilter);
}
}
static void
st_DrawTex(struct gl_context *ctx, GLfloat x, GLfloat y, GLfloat z,
GLfloat width, GLfloat height)
{
struct st_context *st = ctx->st;
struct pipe_context *pipe = st->pipe;
struct cso_context *cso = st->cso_context;
struct pipe_resource *vbuffer = NULL;
GLuint i, numTexCoords, numAttribs;
GLboolean emitColor;
uint semantic_names[2 + MAX_TEXTURE_UNITS];
uint semantic_indexes[2 + MAX_TEXTURE_UNITS];
struct pipe_vertex_element velements[2 + MAX_TEXTURE_UNITS];
unsigned offset;
st_flush_bitmap_cache(st);
st_invalidate_readpix_cache(st);
st_validate_state(st, ST_PIPELINE_RENDER);
/* determine if we need vertex color */
if (ctx->FragmentProgram._Current->info.inputs_read & VARYING_BIT_COL0)
emitColor = GL_TRUE;
else
emitColor = GL_FALSE;
/* determine how many enabled sets of texcoords */
numTexCoords = 0;
for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
if (ctx->Texture.Unit[i]._Current &&
ctx->Texture.Unit[i]._Current->Target == GL_TEXTURE_2D) {
numTexCoords++;
}
}
/* total number of attributes per vertex */
numAttribs = 1 + emitColor + numTexCoords;
/* load vertex buffer */
{
#define SET_ATTRIB(VERT, ATTR, X, Y, Z, W) \
do { \
GLuint k = (((VERT) * numAttribs + (ATTR)) * 4); \
assert(k < 4 * 4 * numAttribs); \
vbuf[k + 0] = X; \
vbuf[k + 1] = Y; \
vbuf[k + 2] = Z; \
vbuf[k + 3] = W; \
} while (0)
const GLfloat x0 = x, y0 = y, x1 = x + width, y1 = y + height;
GLfloat *vbuf = NULL;
GLuint tex_attr;
u_upload_alloc(pipe->stream_uploader, 0,
numAttribs * 4 * 4 * sizeof(GLfloat), 4,
&offset, &vbuffer, (void **) &vbuf);
if (!vbuffer) {
return;
}
z = CLAMP(z, 0.0f, 1.0f);
/* positions (in clip coords) */
{
const struct gl_framebuffer *fb = ctx->DrawBuffer;
const GLfloat fb_width = (GLfloat)_mesa_geometric_width(fb);
const GLfloat fb_height = (GLfloat)_mesa_geometric_height(fb);
const GLfloat clip_x0 = (GLfloat)(x0 / fb_width * 2.0 - 1.0);
const GLfloat clip_y0 = (GLfloat)(y0 / fb_height * 2.0 - 1.0);
const GLfloat clip_x1 = (GLfloat)(x1 / fb_width * 2.0 - 1.0);
const GLfloat clip_y1 = (GLfloat)(y1 / fb_height * 2.0 - 1.0);
SET_ATTRIB(0, 0, clip_x0, clip_y0, z, 1.0f); /* lower left */
SET_ATTRIB(1, 0, clip_x1, clip_y0, z, 1.0f); /* lower right */
SET_ATTRIB(2, 0, clip_x1, clip_y1, z, 1.0f); /* upper right */
SET_ATTRIB(3, 0, clip_x0, clip_y1, z, 1.0f); /* upper left */
semantic_names[0] = TGSI_SEMANTIC_POSITION;
semantic_indexes[0] = 0;
}
/* colors */
if (emitColor) {
const GLfloat *c = ctx->Current.Attrib[VERT_ATTRIB_COLOR0];
SET_ATTRIB(0, 1, c[0], c[1], c[2], c[3]);
SET_ATTRIB(1, 1, c[0], c[1], c[2], c[3]);
SET_ATTRIB(2, 1, c[0], c[1], c[2], c[3]);
SET_ATTRIB(3, 1, c[0], c[1], c[2], c[3]);
semantic_names[1] = TGSI_SEMANTIC_COLOR;
semantic_indexes[1] = 0;
tex_attr = 2;
}
else {
tex_attr = 1;
}
/* texcoords */
for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
if (ctx->Texture.Unit[i]._Current &&
ctx->Texture.Unit[i]._Current->Target == GL_TEXTURE_2D) {
struct gl_texture_object *obj = ctx->Texture.Unit[i]._Current;
const struct gl_texture_image *img = _mesa_base_tex_image(obj);
const GLfloat wt = (GLfloat) img->Width;
const GLfloat ht = (GLfloat) img->Height;
const GLfloat s0 = obj->CropRect[0] / wt;
const GLfloat t0 = obj->CropRect[1] / ht;
const GLfloat s1 = (obj->CropRect[0] + obj->CropRect[2]) / wt;
const GLfloat t1 = (obj->CropRect[1] + obj->CropRect[3]) / ht;
/*printf("crop texcoords: %g, %g .. %g, %g\n", s0, t0, s1, t1);*/
SET_ATTRIB(0, tex_attr, s0, t0, 0.0f, 1.0f); /* lower left */
SET_ATTRIB(1, tex_attr, s1, t0, 0.0f, 1.0f); /* lower right */
SET_ATTRIB(2, tex_attr, s1, t1, 0.0f, 1.0f); /* upper right */
SET_ATTRIB(3, tex_attr, s0, t1, 0.0f, 1.0f); /* upper left */
semantic_names[tex_attr] = st->needs_texcoord_semantic ?
TGSI_SEMANTIC_TEXCOORD : TGSI_SEMANTIC_GENERIC;
/* XXX: should this use semantic index i instead of 0 ? */
semantic_indexes[tex_attr] = 0;
tex_attr++;
}
}
u_upload_unmap(pipe->stream_uploader);
#undef SET_ATTRIB
}
cso_save_state(cso, (CSO_BIT_VIEWPORT |
CSO_BIT_STREAM_OUTPUTS |
CSO_BIT_VERTEX_SHADER |
CSO_BIT_TESSCTRL_SHADER |
CSO_BIT_TESSEVAL_SHADER |
CSO_BIT_GEOMETRY_SHADER |
CSO_BIT_VERTEX_ELEMENTS |
CSO_BIT_AUX_VERTEX_BUFFER_SLOT));
{
void *vs = lookup_shader(pipe, numAttribs,
semantic_names, semantic_indexes);
cso_set_vertex_shader_handle(cso, vs);
}
cso_set_tessctrl_shader_handle(cso, NULL);
cso_set_tesseval_shader_handle(cso, NULL);
cso_set_geometry_shader_handle(cso, NULL);
for (i = 0; i < numAttribs; i++) {
velements[i].src_offset = i * 4 * sizeof(float);
velements[i].instance_divisor = 0;
velements[i].vertex_buffer_index = 0;
velements[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
}
cso_set_vertex_elements(cso, numAttribs, velements);
cso_set_stream_outputs(cso, 0, NULL, NULL);
/* viewport state: viewport matching window dims */
{
const struct gl_framebuffer *fb = ctx->DrawBuffer;
const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP);
const GLfloat width = (GLfloat)_mesa_geometric_width(fb);
const GLfloat height = (GLfloat)_mesa_geometric_height(fb);
struct pipe_viewport_state vp;
vp.scale[0] = 0.5f * width;
vp.scale[1] = height * (invert ? -0.5f : 0.5f);
vp.scale[2] = 1.0f;
vp.translate[0] = 0.5f * width;
vp.translate[1] = 0.5f * height;
vp.translate[2] = 0.0f;
cso_set_viewport(cso, &vp);
}
util_draw_vertex_buffer(pipe, cso, vbuffer,
cso_get_aux_vertex_buffer_slot(cso),
offset, /* offset */
PIPE_PRIM_TRIANGLE_FAN,
4, /* verts */
numAttribs); /* attribs/vert */
pipe_resource_reference(&vbuffer, NULL);
/* restore state */
cso_restore_state(cso);
}
/**
* Do a CopyTex[Sub]Image1/2/3D() using a hardware (blit) path if possible.
* Note that the region to copy has already been clipped so we know we
* won't read from outside the source renderbuffer's bounds.
*
* Note: srcY=0=Bottom of renderbuffer (GL convention)
*/
static void
st_CopyTexSubImage(struct gl_context *ctx, GLuint dims,
struct gl_texture_image *texImage,
GLint destX, GLint destY, GLint destZ,
struct gl_renderbuffer *rb,
GLint srcX, GLint srcY, GLsizei width, GLsizei height)
{
struct st_texture_image *stImage = st_texture_image(texImage);
const GLenum texBaseFormat = texImage->_BaseFormat;
struct st_renderbuffer *strb = st_renderbuffer(rb);
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct pipe_screen *screen = pipe->screen;
enum pipe_format dest_format, src_format;
GLboolean matching_base_formats;
GLuint color_writemask, zs_writemask, sample_count;
struct pipe_surface *dest_surface = NULL;
GLboolean do_flip = (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP);
struct pipe_surface surf_tmpl;
unsigned int dst_usage;
GLint srcY0, srcY1;
/* make sure finalize_textures has been called?
*/
if (0) st_validate_state(st);
if (!strb || !strb->surface || !stImage->pt) {
debug_printf("%s: null strb or stImage\n", __FUNCTION__);
return;
}
sample_count = strb->surface->texture->nr_samples;
/* I believe this would be legal, presumably would need to do a resolve
for color, and for depth/stencil spec says to just use one of the
depth/stencil samples per pixel? Need some transfer clarifications. */
assert(sample_count < 2);
assert(strb);
assert(strb->surface);
assert(stImage->pt);
src_format = strb->surface->format;
dest_format = stImage->pt->format;
/*
* Determine if the src framebuffer and dest texture have the same
* base format. We need this to detect a case such as the framebuffer
* being GL_RGBA but the texture being GL_RGB. If the actual hardware
* texture format stores RGBA we need to set A=1 (overriding the
* framebuffer's alpha values). We can't do that with the blit or
* textured-quad paths.
*/
matching_base_formats =
(_mesa_get_format_base_format(strb->Base.Format) ==
_mesa_get_format_base_format(texImage->TexFormat));
if (ctx->_ImageTransferState) {
goto fallback;
}
if (texImage->TexObject->Target == GL_TEXTURE_1D_ARRAY) {
/* 1D arrays might be thought of as 2D images but the actual layout
* might not be that way. At some points, we convert OpenGL's 1D
* array 'height' into gallium 'layers' and that prevents the blit
* utility code from doing the right thing. Simpy use the memcpy-based
* fallback.
*/
goto fallback;
}
if (matching_base_formats &&
src_format == dest_format &&
!do_flip) {
/* use surface_copy() / blit */
struct pipe_box src_box;
unsigned dstLevel;
u_box_2d_zslice(srcX, srcY, strb->surface->u.tex.first_layer,
width, height, &src_box);
/* If stImage->pt is an independent image (not a pointer into a full
* mipmap) stImage->pt.last_level will be zero and we need to use that
* as the dest level.
*/
dstLevel = MIN2(stImage->base.Level, stImage->pt->last_level);
/* for resource_copy_region(), y=0=top, always */
pipe->resource_copy_region(pipe,
/* dest */
stImage->pt,
dstLevel,
destX, destY, destZ + stImage->base.Face,
/* src */
strb->texture,
strb->surface->u.tex.level,
&src_box);
return;
}
if (texBaseFormat == GL_DEPTH_STENCIL) {
goto fallback;
}
if (texBaseFormat == GL_DEPTH_COMPONENT) {
color_writemask = 0;
zs_writemask = BLIT_WRITEMASK_Z;
dst_usage = PIPE_BIND_DEPTH_STENCIL;
}
else {
color_writemask = compatible_src_dst_formats(ctx, &strb->Base, texImage);
zs_writemask = 0;
dst_usage = PIPE_BIND_RENDER_TARGET;
}
if ((!color_writemask && !zs_writemask) ||
!screen->is_format_supported(screen, src_format,
PIPE_TEXTURE_2D, sample_count,
PIPE_BIND_SAMPLER_VIEW) ||
!screen->is_format_supported(screen, dest_format,
PIPE_TEXTURE_2D, 0,
dst_usage)) {
goto fallback;
}
if (do_flip) {
srcY1 = strb->Base.Height - srcY - height;
srcY0 = srcY1 + height;
}
else {
srcY0 = srcY;
srcY1 = srcY0 + height;
}
/* Disable conditional rendering. */
if (st->render_condition) {
pipe->render_condition(pipe, NULL, 0);
}
memset(&surf_tmpl, 0, sizeof(surf_tmpl));
surf_tmpl.format = util_format_linear(stImage->pt->format);
surf_tmpl.usage = dst_usage;
surf_tmpl.u.tex.level = stImage->base.Level;
surf_tmpl.u.tex.first_layer = stImage->base.Face + destZ;
surf_tmpl.u.tex.last_layer = stImage->base.Face + destZ;
dest_surface = pipe->create_surface(pipe, stImage->pt,
&surf_tmpl);
util_blit_pixels(st->blit,
strb->texture,
strb->surface->u.tex.level,
srcX, srcY0,
srcX + width, srcY1,
strb->surface->u.tex.first_layer,
dest_surface,
destX, destY,
destX + width, destY + height,
0.0, PIPE_TEX_MIPFILTER_NEAREST,
color_writemask, zs_writemask);
pipe_surface_reference(&dest_surface, NULL);
/* Restore conditional rendering state. */
if (st->render_condition) {
pipe->render_condition(pipe, st->render_condition,
st->condition_mode);
}
return;
fallback:
/* software fallback */
fallback_copy_texsubimage(ctx,
strb, stImage, texBaseFormat,
destX, destY, destZ,
srcX, srcY, width, height);
}
static void
st_BlitFramebuffer(GLcontext *ctx,
GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter)
{
const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
GL_STENCIL_BUFFER_BIT);
struct st_context *st = st_context(ctx);
const uint pFilter = ((filter == GL_NEAREST)
? PIPE_TEX_MIPFILTER_NEAREST
: PIPE_TEX_MIPFILTER_LINEAR);
struct gl_framebuffer *readFB = ctx->ReadBuffer;
struct gl_framebuffer *drawFB = ctx->DrawBuffer;
if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
&dstX0, &dstY0, &dstX1, &dstY1)) {
return; /* nothing to draw/blit */
}
if (st_fb_orientation(drawFB) == Y_0_TOP) {
/* invert Y for dest */
dstY0 = drawFB->Height - dstY0;
dstY1 = drawFB->Height - dstY1;
}
if (st_fb_orientation(readFB) == Y_0_TOP) {
/* invert Y for src */
srcY0 = readFB->Height - srcY0;
srcY1 = readFB->Height - srcY1;
}
if (srcY0 > srcY1 && dstY0 > dstY1) {
/* Both src and dst are upside down. Swap Y to make it
* right-side up to increase odds of using a fast path.
* Recall that all Gallium raster coords have Y=0=top.
*/
GLint tmp;
tmp = srcY0;
srcY0 = srcY1;
srcY1 = tmp;
tmp = dstY0;
dstY0 = dstY1;
dstY1 = tmp;
}
if (mask & GL_COLOR_BUFFER_BIT) {
struct gl_renderbuffer_attachment *srcAtt =
&readFB->Attachment[readFB->_ColorReadBufferIndex];
if(srcAtt->Type == GL_TEXTURE) {
struct st_texture_object *srcObj =
st_texture_object(srcAtt->Texture);
struct st_renderbuffer *dstRb =
st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
struct pipe_subresource srcSub;
struct pipe_surface *dstSurf = dstRb->surface;
if (!srcObj->pt)
return;
srcSub.face = srcAtt->CubeMapFace;
srcSub.level = srcAtt->TextureLevel;
util_blit_pixels(st->blit, srcObj->pt, srcSub,
srcX0, srcY0, srcX1, srcY1, srcAtt->Zoffset,
dstSurf, dstX0, dstY0, dstX1, dstY1,
0.0, pFilter);
}
else {
struct st_renderbuffer *srcRb =
st_renderbuffer(readFB->_ColorReadBuffer);
struct st_renderbuffer *dstRb =
st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
struct pipe_surface *srcSurf = srcRb->surface;
struct pipe_surface *dstSurf = dstRb->surface;
struct pipe_subresource srcSub;
srcSub.face = srcSurf->face;
srcSub.level = srcSurf->level;
util_blit_pixels(st->blit,
srcRb->texture, srcSub, srcX0, srcY0, srcX1, srcY1,
srcSurf->zslice,
dstSurf, dstX0, dstY0, dstX1, dstY1,
0.0, pFilter);
}
}
if (mask & depthStencil) {
/* depth and/or stencil blit */
/* get src/dst depth surfaces */
struct gl_renderbuffer_attachment *srcDepth =
&readFB->Attachment[BUFFER_DEPTH];
struct gl_renderbuffer_attachment *dstDepth =
&drawFB->Attachment[BUFFER_DEPTH];
struct gl_renderbuffer_attachment *srcStencil =
&readFB->Attachment[BUFFER_STENCIL];
struct gl_renderbuffer_attachment *dstStencil =
&drawFB->Attachment[BUFFER_STENCIL];
struct st_renderbuffer *srcDepthRb =
st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
struct st_renderbuffer *dstDepthRb =
st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
struct pipe_surface *dstDepthSurf =
dstDepthRb ? dstDepthRb->surface : NULL;
if ((mask & depthStencil) == depthStencil &&
st_is_depth_stencil_combined(srcDepth, srcStencil) &&
st_is_depth_stencil_combined(dstDepth, dstStencil)) {
/* Blitting depth and stencil values between combined
* depth/stencil buffers. This is the ideal case for such buffers.
*/
util_blit_pixels(st->blit, srcDepthRb->texture,
u_subresource(srcDepthRb->surface->face,
srcDepthRb->surface->level),
srcX0, srcY0, srcX1, srcY1,
srcDepthRb->surface->zslice,
dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
0.0, pFilter);
}
else {
/* blitting depth and stencil separately */
if (mask & GL_DEPTH_BUFFER_BIT) {
util_blit_pixels(st->blit, srcDepthRb->texture,
u_subresource(srcDepthRb->surface->face,
srcDepthRb->surface->level),
srcX0, srcY0, srcX1, srcY1,
srcDepthRb->surface->zslice,
dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
0.0, pFilter);
}
if (mask & GL_STENCIL_BUFFER_BIT) {
/* blit stencil only */
_mesa_problem(ctx, "st_BlitFramebuffer(STENCIL) not completed");
}
}
}
}
/**
* Render a glBitmap by drawing a textured quad
*/
static void
draw_bitmap_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z,
GLsizei width, GLsizei height,
struct pipe_sampler_view *sv,
const GLfloat *color)
{
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct cso_context *cso = st->cso_context;
struct st_fp_variant *fpv;
struct st_fp_variant_key key;
GLuint maxSize;
GLuint offset;
memset(&key, 0, sizeof(key));
key.st = st;
key.bitmap = GL_TRUE;
fpv = st_get_fp_variant(st, st->fp, &key);
/* As an optimization, Mesa's fragment programs will sometimes get the
* primary color from a statevar/constant rather than a varying variable.
* when that's the case, we need to ensure that we use the 'color'
* parameter and not the current attribute color (which may have changed
* through glRasterPos and state validation.
* So, we force the proper color here. Not elegant, but it works.
*/
{
GLfloat colorSave[4];
COPY_4V(colorSave, ctx->Current.Attrib[VERT_ATTRIB_COLOR0]);
COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], color);
st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT);
COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], colorSave);
}
/* limit checks */
/* XXX if the bitmap is larger than the max texture size, break
* it up into chunks.
*/
maxSize = 1 << (pipe->screen->get_param(pipe->screen,
PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1);
assert(width <= (GLsizei)maxSize);
assert(height <= (GLsizei)maxSize);
cso_save_rasterizer(cso);
cso_save_samplers(cso);
cso_save_fragment_sampler_views(cso);
cso_save_viewport(cso);
cso_save_fragment_shader(cso);
cso_save_vertex_shader(cso);
cso_save_vertex_elements(cso);
cso_save_vertex_buffers(cso);
/* rasterizer state: just scissor */
st->bitmap.rasterizer.scissor = ctx->Scissor.Enabled;
cso_set_rasterizer(cso, &st->bitmap.rasterizer);
/* fragment shader state: TEX lookup program */
cso_set_fragment_shader_handle(cso, fpv->driver_shader);
/* vertex shader state: position + texcoord pass-through */
cso_set_vertex_shader_handle(cso, st->bitmap.vs);
/* user samplers, plus our bitmap sampler */
{
struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS];
uint num = MAX2(fpv->bitmap_sampler + 1, st->state.num_samplers);
uint i;
for (i = 0; i < st->state.num_samplers; i++) {
samplers[i] = &st->state.samplers[i];
}
samplers[fpv->bitmap_sampler] =
&st->bitmap.samplers[sv->texture->target != PIPE_TEXTURE_RECT];
cso_set_samplers(cso, num, (const struct pipe_sampler_state **) samplers);
}
/* user textures, plus the bitmap texture */
{
struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS];
uint num = MAX2(fpv->bitmap_sampler + 1, st->state.num_textures);
memcpy(sampler_views, st->state.sampler_views, sizeof(sampler_views));
sampler_views[fpv->bitmap_sampler] = sv;
cso_set_fragment_sampler_views(cso, num, sampler_views);
}
/* viewport state: viewport matching window dims */
{
const struct gl_framebuffer *fb = st->ctx->DrawBuffer;
const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP);
const GLfloat width = (GLfloat)fb->Width;
const GLfloat height = (GLfloat)fb->Height;
struct pipe_viewport_state vp;
vp.scale[0] = 0.5f * width;
vp.scale[1] = height * (invert ? -0.5f : 0.5f);
vp.scale[2] = 0.5f;
vp.scale[3] = 1.0f;
vp.translate[0] = 0.5f * width;
vp.translate[1] = 0.5f * height;
vp.translate[2] = 0.5f;
vp.translate[3] = 0.0f;
cso_set_viewport(cso, &vp);
}
cso_set_vertex_elements(cso, 3, st->velems_util_draw);
/* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
z = z * 2.0 - 1.0;
/* draw textured quad */
offset = setup_bitmap_vertex_data(st,
sv->texture->target != PIPE_TEXTURE_RECT,
x, y, width, height, z, color);
util_draw_vertex_buffer(pipe, st->cso_context, st->bitmap.vbuf, offset,
PIPE_PRIM_TRIANGLE_FAN,
4, /* verts */
3); /* attribs/vert */
/* restore state */
cso_restore_rasterizer(cso);
cso_restore_samplers(cso);
cso_restore_fragment_sampler_views(cso);
cso_restore_viewport(cso);
cso_restore_fragment_shader(cso);
cso_restore_vertex_shader(cso);
cso_restore_vertex_elements(cso);
cso_restore_vertex_buffers(cso);
}
static void
st_BlitFramebuffer(GLcontext *ctx,
GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter)
{
const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
GL_STENCIL_BUFFER_BIT);
struct st_context *st = ctx->st;
const uint pFilter = ((filter == GL_NEAREST)
? PIPE_TEX_MIPFILTER_NEAREST
: PIPE_TEX_MIPFILTER_LINEAR);
struct gl_framebuffer *readFB = ctx->ReadBuffer;
struct gl_framebuffer *drawFB = ctx->DrawBuffer;
if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
&dstX0, &dstY0, &dstX1, &dstY1)) {
return; /* nothing to draw/blit */
}
if (st_fb_orientation(drawFB) == Y_0_TOP) {
/* invert Y for dest */
dstY0 = drawFB->Height - dstY0;
dstY1 = drawFB->Height - dstY1;
}
if (st_fb_orientation(readFB) == Y_0_TOP) {
/* invert Y for src */
srcY0 = readFB->Height - srcY0;
srcY1 = readFB->Height - srcY1;
}
if (srcY0 > srcY1 && dstY0 > dstY1) {
/* Both src and dst are upside down. Swap Y to make it
* right-side up to increase odds of using a fast path.
* Recall that all Gallium raster coords have Y=0=top.
*/
GLint tmp;
tmp = srcY0;
srcY0 = srcY1;
srcY1 = tmp;
tmp = dstY0;
dstY0 = dstY1;
dstY1 = tmp;
}
if (mask & GL_COLOR_BUFFER_BIT) {
struct st_renderbuffer *srcRb =
st_renderbuffer(readFB->_ColorReadBuffer);
struct st_renderbuffer *dstRb =
st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
struct pipe_surface *srcSurf = srcRb->surface;
struct pipe_surface *dstSurf = dstRb->surface;
util_blit_pixels(st->blit,
srcSurf, srcX0, srcY0, srcX1, srcY1,
dstSurf, dstX0, dstY0, dstX1, dstY1,
0.0, pFilter);
}
if (mask & depthStencil) {
/* depth and/or stencil blit */
/* get src/dst depth surfaces */
struct st_renderbuffer *srcDepthRb =
st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
struct st_renderbuffer *dstDepthRb =
st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
struct pipe_surface *srcDepthSurf =
srcDepthRb ? srcDepthRb->surface : NULL;
struct pipe_surface *dstDepthSurf =
dstDepthRb ? dstDepthRb->surface : NULL;
/* get src/dst stencil surfaces */
struct st_renderbuffer *srcStencilRb =
st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
struct st_renderbuffer *dstStencilRb =
st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
struct pipe_surface *srcStencilSurf =
srcStencilRb ? srcStencilRb->surface : NULL;
struct pipe_surface *dstStencilSurf =
dstStencilRb ? dstStencilRb->surface : NULL;
if ((mask & depthStencil) == depthStencil &&
srcDepthSurf == srcStencilSurf &&
dstDepthSurf == dstStencilSurf) {
/* Blitting depth and stencil values between combined
* depth/stencil buffers. This is the ideal case for such buffers.
*/
util_blit_pixels(st->blit,
srcDepthSurf, srcX0, srcY0, srcX1, srcY1,
dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
0.0, pFilter);
}
else {
/* blitting depth and stencil separately */
if (mask & GL_DEPTH_BUFFER_BIT) {
/* blit Z only */
_mesa_problem(ctx, "st_BlitFramebuffer(DEPTH) not completed");
}
if (mask & GL_STENCIL_BUFFER_BIT) {
/* blit stencil only */
_mesa_problem(ctx, "st_BlitFramebuffer(STENCIL) not completed");
}
}
}
}
/**
* Update framebuffer state (color, depth, stencil, etc. buffers)
*/
void
st_update_framebuffer_state( struct st_context *st )
{
struct pipe_framebuffer_state framebuffer;
struct gl_framebuffer *fb = st->ctx->DrawBuffer;
struct st_renderbuffer *strb;
GLuint i;
st_flush_bitmap_cache(st);
st_invalidate_readpix_cache(st);
st->state.fb_orientation = st_fb_orientation(fb);
/**
* Quantize the derived default number of samples:
*
* A query to the driver of supported MSAA values the
* hardware supports is done as to legalize the number
* of application requested samples, NumSamples.
* See commit eb9cf3c for more information.
*/
fb->DefaultGeometry._NumSamples =
framebuffer_quantize_num_samples(st, fb->DefaultGeometry.NumSamples);
framebuffer.width = _mesa_geometric_width(fb);
framebuffer.height = _mesa_geometric_height(fb);
framebuffer.samples = _mesa_geometric_samples(fb);
framebuffer.layers = _mesa_geometric_layers(fb);
/* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state
* to determine which surfaces to draw to
*/
framebuffer.nr_cbufs = fb->_NumColorDrawBuffers;
for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
framebuffer.cbufs[i] = NULL;
strb = st_renderbuffer(fb->_ColorDrawBuffers[i]);
if (strb) {
if (strb->is_rtt || (strb->texture &&
_mesa_get_format_color_encoding(strb->Base.Format) == GL_SRGB)) {
/* rendering to a GL texture, may have to update surface */
st_update_renderbuffer_surface(st, strb);
}
if (strb->surface) {
framebuffer.cbufs[i] = strb->surface;
update_framebuffer_size(&framebuffer, strb->surface);
}
strb->defined = GL_TRUE; /* we'll be drawing something */
}
}
for (i = framebuffer.nr_cbufs; i < PIPE_MAX_COLOR_BUFS; i++) {
framebuffer.cbufs[i] = NULL;
}
/* Remove trailing GL_NONE draw buffers. */
while (framebuffer.nr_cbufs &&
!framebuffer.cbufs[framebuffer.nr_cbufs-1]) {
framebuffer.nr_cbufs--;
}
/*
* Depth/Stencil renderbuffer/surface.
*/
strb = st_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
if (!strb)
strb = st_renderbuffer(fb->Attachment[BUFFER_STENCIL].Renderbuffer);
if (strb) {
if (strb->is_rtt) {
/* rendering to a GL texture, may have to update surface */
st_update_renderbuffer_surface(st, strb);
}
framebuffer.zsbuf = strb->surface;
update_framebuffer_size(&framebuffer, strb->surface);
}
else
framebuffer.zsbuf = NULL;
#ifdef DEBUG
/* Make sure the resource binding flags were set properly */
for (i = 0; i < framebuffer.nr_cbufs; i++) {
assert(!framebuffer.cbufs[i] ||
framebuffer.cbufs[i]->texture->bind & PIPE_BIND_RENDER_TARGET);
}
if (framebuffer.zsbuf) {
assert(framebuffer.zsbuf->texture->bind & PIPE_BIND_DEPTH_STENCIL);
}
#endif
if (framebuffer.width == USHRT_MAX)
framebuffer.width = 0;
if (framebuffer.height == USHRT_MAX)
framebuffer.height = 0;
cso_set_framebuffer(st->cso_context, &framebuffer);
st->state.fb_width = framebuffer.width;
st->state.fb_height = framebuffer.height;
st->state.fb_num_samples = util_framebuffer_get_num_samples(&framebuffer);
st->state.fb_num_layers = util_framebuffer_get_num_layers(&framebuffer);
st->state.fb_num_cb = framebuffer.nr_cbufs;
}
/**
* Do a CopyTex[Sub]Image1/2/3D() using a hardware (blit) path if possible.
* Note that the region to copy has already been clipped so we know we
* won't read from outside the source renderbuffer's bounds.
*
* Note: srcY=0=Bottom of renderbuffer (GL convention)
*/
static void
st_copy_texsubimage(struct gl_context *ctx,
struct gl_texture_image *texImage,
GLint destX, GLint destY, GLint destZ,
struct gl_renderbuffer *rb,
GLint srcX, GLint srcY,
GLsizei width, GLsizei height)
{
struct st_texture_image *stImage = st_texture_image(texImage);
const GLenum texBaseFormat = texImage->_BaseFormat;
struct gl_framebuffer *fb = ctx->ReadBuffer;
struct st_renderbuffer *strb;
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct pipe_screen *screen = pipe->screen;
enum pipe_format dest_format, src_format;
GLboolean matching_base_formats;
GLuint format_writemask, sample_count;
struct pipe_surface *dest_surface = NULL;
GLboolean do_flip = (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP);
struct pipe_surface surf_tmpl;
unsigned int dst_usage;
GLint srcY0, srcY1;
/* make sure finalize_textures has been called?
*/
if (0) st_validate_state(st);
/* determine if copying depth or color data */
if (texBaseFormat == GL_DEPTH_COMPONENT ||
texBaseFormat == GL_DEPTH_STENCIL) {
strb = st_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
}
else {
/* texBaseFormat == GL_RGB, GL_RGBA, GL_ALPHA, etc */
strb = st_renderbuffer(fb->_ColorReadBuffer);
}
if (!strb || !strb->surface || !stImage->pt) {
debug_printf("%s: null strb or stImage\n", __FUNCTION__);
return;
}
sample_count = strb->surface->texture->nr_samples;
/* I believe this would be legal, presumably would need to do a resolve
for color, and for depth/stencil spec says to just use one of the
depth/stencil samples per pixel? Need some transfer clarifications. */
assert(sample_count < 2);
assert(strb);
assert(strb->surface);
assert(stImage->pt);
src_format = strb->surface->format;
dest_format = stImage->pt->format;
/*
* Determine if the src framebuffer and dest texture have the same
* base format. We need this to detect a case such as the framebuffer
* being GL_RGBA but the texture being GL_RGB. If the actual hardware
* texture format stores RGBA we need to set A=1 (overriding the
* framebuffer's alpha values). We can't do that with the blit or
* textured-quad paths.
*/
matching_base_formats =
(_mesa_get_format_base_format(strb->Base.Format) ==
_mesa_get_format_base_format(texImage->TexFormat));
if (ctx->_ImageTransferState) {
goto fallback;
}
if (matching_base_formats &&
src_format == dest_format &&
!do_flip) {
/* use surface_copy() / blit */
struct pipe_box src_box;
u_box_2d_zslice(srcX, srcY, strb->surface->u.tex.first_layer,
width, height, &src_box);
/* for resource_copy_region(), y=0=top, always */
pipe->resource_copy_region(pipe,
/* dest */
stImage->pt,
stImage->base.Level,
destX, destY, destZ + stImage->base.Face,
/* src */
strb->texture,
strb->surface->u.tex.level,
&src_box);
return;
}
if (texBaseFormat == GL_DEPTH_STENCIL) {
goto fallback;
}
if (texBaseFormat == GL_DEPTH_COMPONENT) {
format_writemask = TGSI_WRITEMASK_XYZW;
dst_usage = PIPE_BIND_DEPTH_STENCIL;
}
else {
format_writemask = compatible_src_dst_formats(ctx, &strb->Base, texImage);
dst_usage = PIPE_BIND_RENDER_TARGET;
}
if (!format_writemask ||
!screen->is_format_supported(screen, src_format,
PIPE_TEXTURE_2D, sample_count,
PIPE_BIND_SAMPLER_VIEW) ||
!screen->is_format_supported(screen, dest_format,
PIPE_TEXTURE_2D, 0,
dst_usage)) {
goto fallback;
}
if (do_flip) {
srcY1 = strb->Base.Height - srcY - height;
srcY0 = srcY1 + height;
}
else {
srcY0 = srcY;
srcY1 = srcY0 + height;
}
/* Disable conditional rendering. */
if (st->render_condition) {
pipe->render_condition(pipe, NULL, 0);
}
memset(&surf_tmpl, 0, sizeof(surf_tmpl));
surf_tmpl.format = util_format_linear(stImage->pt->format);
surf_tmpl.usage = dst_usage;
surf_tmpl.u.tex.level = stImage->base.Level;
surf_tmpl.u.tex.first_layer = stImage->base.Face + destZ;
surf_tmpl.u.tex.last_layer = stImage->base.Face + destZ;
dest_surface = pipe->create_surface(pipe, stImage->pt,
&surf_tmpl);
util_blit_pixels_writemask(st->blit,
strb->texture,
strb->surface->u.tex.level,
srcX, srcY0,
srcX + width, srcY1,
strb->surface->u.tex.first_layer,
dest_surface,
destX, destY,
destX + width, destY + height,
0.0, PIPE_TEX_MIPFILTER_NEAREST,
format_writemask);
pipe_surface_reference(&dest_surface, NULL);
/* Restore conditional rendering state. */
if (st->render_condition) {
pipe->render_condition(pipe, st->render_condition,
st->condition_mode);
}
return;
fallback:
/* software fallback */
fallback_copy_texsubimage(ctx,
strb, stImage, texBaseFormat,
destX, destY, destZ,
srcX, srcY, width, height);
}
/**
* Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we
* can't use a fragment shader to write stencil values.
*/
static void
draw_stencil_pixels(struct gl_context *ctx, GLint x, GLint y,
GLsizei width, GLsizei height, GLenum format, GLenum type,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels)
{
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct st_renderbuffer *strb;
enum pipe_transfer_usage usage;
struct pipe_transfer *pt;
const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
GLint skipPixels;
ubyte *stmap;
struct gl_pixelstore_attrib clippedUnpack = *unpack;
if (!zoom) {
if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height,
&clippedUnpack)) {
/* totally clipped */
return;
}
}
strb = st_renderbuffer(ctx->DrawBuffer->
Attachment[BUFFER_STENCIL].Renderbuffer);
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
y = ctx->DrawBuffer->Height - y - height;
}
if(format != GL_DEPTH_STENCIL &&
util_format_get_component_bits(strb->format,
UTIL_FORMAT_COLORSPACE_ZS, 0) != 0)
usage = PIPE_TRANSFER_READ_WRITE;
else
usage = PIPE_TRANSFER_WRITE;
pt = pipe_get_transfer(pipe, strb->texture,
strb->rtt_level, strb->rtt_face + strb->rtt_slice,
usage, x, y,
width, height);
stmap = pipe_transfer_map(pipe, pt);
pixels = _mesa_map_pbo_source(ctx, &clippedUnpack, pixels);
assert(pixels);
/* if width > MAX_WIDTH, have to process image in chunks */
skipPixels = 0;
while (skipPixels < width) {
const GLint spanX = skipPixels;
const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
GLint row;
for (row = 0; row < height; row++) {
GLubyte sValues[MAX_WIDTH];
GLuint zValues[MAX_WIDTH];
GLenum destType = GL_UNSIGNED_BYTE;
const GLvoid *source = _mesa_image_address2d(&clippedUnpack, pixels,
width, height,
format, type,
row, skipPixels);
_mesa_unpack_stencil_span(ctx, spanWidth, destType, sValues,
type, source, &clippedUnpack,
ctx->_ImageTransferState);
if (format == GL_DEPTH_STENCIL) {
_mesa_unpack_depth_span(ctx, spanWidth, GL_UNSIGNED_INT, zValues,
(1 << 24) - 1, type, source,
&clippedUnpack);
}
if (zoom) {
_mesa_problem(ctx, "Gallium glDrawPixels(GL_STENCIL) with "
"zoom not complete");
}
{
GLint spanY;
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
spanY = height - row - 1;
}
else {
spanY = row;
}
/* now pack the stencil (and Z) values in the dest format */
switch (pt->resource->format) {
case PIPE_FORMAT_S8_USCALED:
{
ubyte *dest = stmap + spanY * pt->stride + spanX;
assert(usage == PIPE_TRANSFER_WRITE);
memcpy(dest, sValues, spanWidth);
}
break;
case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
if (format == GL_DEPTH_STENCIL) {
uint *dest = (uint *) (stmap + spanY * pt->stride + spanX*4);
GLint k;
assert(usage == PIPE_TRANSFER_WRITE);
for (k = 0; k < spanWidth; k++) {
dest[k] = zValues[k] | (sValues[k] << 24);
}
}
else {
uint *dest = (uint *) (stmap + spanY * pt->stride + spanX*4);
GLint k;
assert(usage == PIPE_TRANSFER_READ_WRITE);
for (k = 0; k < spanWidth; k++) {
dest[k] = (dest[k] & 0xffffff) | (sValues[k] << 24);
}
}
break;
case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
if (format == GL_DEPTH_STENCIL) {
uint *dest = (uint *) (stmap + spanY * pt->stride + spanX*4);
GLint k;
assert(usage == PIPE_TRANSFER_WRITE);
for (k = 0; k < spanWidth; k++) {
dest[k] = (zValues[k] << 8) | (sValues[k] & 0xff);
}
}
else {
uint *dest = (uint *) (stmap + spanY * pt->stride + spanX*4);
GLint k;
assert(usage == PIPE_TRANSFER_READ_WRITE);
for (k = 0; k < spanWidth; k++) {
dest[k] = (dest[k] & 0xffffff00) | (sValues[k] & 0xff);
}
}
break;
default:
assert(0);
}
}
}
skipPixels += spanWidth;
}
_mesa_unmap_pbo_source(ctx, &clippedUnpack);
/* unmap the stencil buffer */
pipe_transfer_unmap(pipe, pt);
pipe->transfer_destroy(pipe, pt);
}
static void
draw_textured_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z,
GLsizei width, GLsizei height,
GLfloat zoomX, GLfloat zoomY,
struct pipe_sampler_view **sv,
int num_sampler_view,
void *driver_vp,
void *driver_fp,
const GLfloat *color,
GLboolean invertTex,
GLboolean write_depth, GLboolean write_stencil)
{
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct cso_context *cso = st->cso_context;
GLfloat x0, y0, x1, y1;
GLsizei maxSize;
boolean normalized = sv[0]->texture->target != PIPE_TEXTURE_RECT;
/* limit checks */
/* XXX if DrawPixels image is larger than max texture size, break
* it up into chunks.
*/
maxSize = 1 << (pipe->screen->get_param(pipe->screen,
PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1);
assert(width <= maxSize);
assert(height <= maxSize);
cso_save_rasterizer(cso);
cso_save_viewport(cso);
cso_save_samplers(cso);
cso_save_fragment_sampler_views(cso);
cso_save_fragment_shader(cso);
cso_save_vertex_shader(cso);
cso_save_vertex_elements(cso);
cso_save_vertex_buffers(cso);
if (write_stencil) {
cso_save_depth_stencil_alpha(cso);
cso_save_blend(cso);
}
/* rasterizer state: just scissor */
{
struct pipe_rasterizer_state rasterizer;
memset(&rasterizer, 0, sizeof(rasterizer));
rasterizer.clamp_fragment_color = ctx->Color._ClampFragmentColor;
rasterizer.gl_rasterization_rules = 1;
rasterizer.scissor = ctx->Scissor.Enabled;
cso_set_rasterizer(cso, &rasterizer);
}
if (write_stencil) {
/* Stencil writing bypasses the normal fragment pipeline to
* disable color writing and set stencil test to always pass.
*/
struct pipe_depth_stencil_alpha_state dsa;
struct pipe_blend_state blend;
/* depth/stencil */
memset(&dsa, 0, sizeof(dsa));
dsa.stencil[0].enabled = 1;
dsa.stencil[0].func = PIPE_FUNC_ALWAYS;
dsa.stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff;
dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE;
if (write_depth) {
/* writing depth+stencil: depth test always passes */
dsa.depth.enabled = 1;
dsa.depth.writemask = ctx->Depth.Mask;
dsa.depth.func = PIPE_FUNC_ALWAYS;
}
cso_set_depth_stencil_alpha(cso, &dsa);
/* blend (colormask) */
memset(&blend, 0, sizeof(blend));
cso_set_blend(cso, &blend);
}
/* fragment shader state: TEX lookup program */
cso_set_fragment_shader_handle(cso, driver_fp);
/* vertex shader state: position + texcoord pass-through */
cso_set_vertex_shader_handle(cso, driver_vp);
/* texture sampling state: */
{
struct pipe_sampler_state sampler;
memset(&sampler, 0, sizeof(sampler));
sampler.wrap_s = PIPE_TEX_WRAP_CLAMP;
sampler.wrap_t = PIPE_TEX_WRAP_CLAMP;
sampler.wrap_r = PIPE_TEX_WRAP_CLAMP;
sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
sampler.normalized_coords = normalized;
cso_single_sampler(cso, 0, &sampler);
if (num_sampler_view > 1) {
cso_single_sampler(cso, 1, &sampler);
}
cso_single_sampler_done(cso);
}
/* viewport state: viewport matching window dims */
{
const float w = (float) ctx->DrawBuffer->Width;
const float h = (float) ctx->DrawBuffer->Height;
struct pipe_viewport_state vp;
vp.scale[0] = 0.5f * w;
vp.scale[1] = -0.5f * h;
vp.scale[2] = 0.5f;
vp.scale[3] = 1.0f;
vp.translate[0] = 0.5f * w;
vp.translate[1] = 0.5f * h;
vp.translate[2] = 0.5f;
vp.translate[3] = 0.0f;
cso_set_viewport(cso, &vp);
}
cso_set_vertex_elements(cso, 3, st->velems_util_draw);
/* texture state: */
cso_set_fragment_sampler_views(cso, num_sampler_view, sv);
/* Compute Gallium window coords (y=0=top) with pixel zoom.
* Recall that these coords are transformed by the current
* vertex shader and viewport transformation.
*/
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM) {
y = ctx->DrawBuffer->Height - (int) (y + height * ctx->Pixel.ZoomY);
invertTex = !invertTex;
}
x0 = (GLfloat) x;
x1 = x + width * ctx->Pixel.ZoomX;
y0 = (GLfloat) y;
y1 = y + height * ctx->Pixel.ZoomY;
/* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
z = z * 2.0 - 1.0;
draw_quad(ctx, x0, y0, z, x1, y1, color, invertTex,
normalized ? ((GLfloat) width / sv[0]->texture->width0) : (GLfloat)width,
normalized ? ((GLfloat) height / sv[0]->texture->height0) : (GLfloat)height);
/* restore state */
cso_restore_rasterizer(cso);
cso_restore_viewport(cso);
cso_restore_samplers(cso);
cso_restore_fragment_sampler_views(cso);
cso_restore_fragment_shader(cso);
cso_restore_vertex_shader(cso);
cso_restore_vertex_elements(cso);
cso_restore_vertex_buffers(cso);
if (write_stencil) {
cso_restore_depth_stencil_alpha(cso);
cso_restore_blend(cso);
}
}
static void
st_CopyPixels(struct gl_context *ctx, GLint srcx, GLint srcy,
GLsizei width, GLsizei height,
GLint dstx, GLint dsty, GLenum type)
{
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct pipe_screen *screen = pipe->screen;
struct st_renderbuffer *rbRead;
void *driver_vp, *driver_fp;
struct pipe_resource *pt;
struct pipe_sampler_view *sv[2];
int num_sampler_view = 1;
GLfloat *color;
enum pipe_format srcFormat, texFormat;
GLboolean invertTex = GL_FALSE;
GLint readX, readY, readW, readH;
GLuint sample_count;
struct gl_pixelstore_attrib pack = ctx->DefaultPacking;
struct st_fp_variant *fpv;
st_validate_state(st);
if (type == GL_STENCIL) {
/* can't use texturing to do stencil */
copy_stencil_pixels(ctx, srcx, srcy, width, height, dstx, dsty);
return;
}
if (blit_copy_pixels(ctx, srcx, srcy, width, height, dstx, dsty, type))
return;
/*
* The subsequent code implements glCopyPixels by copying the source
* pixels into a temporary texture that's then applied to a textured quad.
* When we draw the textured quad, all the usual per-fragment operations
* are handled.
*/
/*
* Get vertex/fragment shaders
*/
if (type == GL_COLOR) {
rbRead = st_get_color_read_renderbuffer(ctx);
color = NULL;
fpv = get_color_fp_variant(st);
driver_fp = fpv->driver_shader;
driver_vp = make_passthrough_vertex_shader(st, GL_FALSE);
if (st->pixel_xfer.pixelmap_enabled) {
sv[1] = st->pixel_xfer.pixelmap_sampler_view;
num_sampler_view++;
}
}
else {
assert(type == GL_DEPTH);
rbRead = st_renderbuffer(ctx->ReadBuffer->_DepthBuffer);
color = ctx->Current.Attrib[VERT_ATTRIB_COLOR0];
fpv = get_depth_stencil_fp_variant(st, GL_TRUE, GL_FALSE);
driver_fp = fpv->driver_shader;
driver_vp = make_passthrough_vertex_shader(st, GL_TRUE);
}
/* update fragment program constants */
st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT);
if (rbRead->Base.Wrapped)
rbRead = st_renderbuffer(rbRead->Base.Wrapped);
sample_count = rbRead->texture->nr_samples;
/* I believe this would be legal, presumably would need to do a resolve
for color, and for depth/stencil spec says to just use one of the
depth/stencil samples per pixel? Need some transfer clarifications. */
assert(sample_count < 2);
srcFormat = rbRead->texture->format;
if (screen->is_format_supported(screen, srcFormat, st->internal_target,
sample_count,
PIPE_BIND_SAMPLER_VIEW)) {
texFormat = srcFormat;
}
else {
/* srcFormat can't be used as a texture format */
if (type == GL_DEPTH) {
texFormat = st_choose_format(screen, GL_DEPTH_COMPONENT,
GL_NONE, GL_NONE, st->internal_target,
sample_count, PIPE_BIND_DEPTH_STENCIL);
assert(texFormat != PIPE_FORMAT_NONE);
}
else {
/* default color format */
texFormat = st_choose_format(screen, GL_RGBA,
GL_NONE, GL_NONE, st->internal_target,
sample_count, PIPE_BIND_SAMPLER_VIEW);
assert(texFormat != PIPE_FORMAT_NONE);
}
}
/* Invert src region if needed */
if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
srcy = ctx->ReadBuffer->Height - srcy - height;
invertTex = !invertTex;
}
/* Clip the read region against the src buffer bounds.
* We'll still allocate a temporary buffer/texture for the original
* src region size but we'll only read the region which is on-screen.
* This may mean that we draw garbage pixels into the dest region, but
* that's expected.
*/
readX = srcx;
readY = srcy;
readW = width;
readH = height;
_mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack);
readW = MAX2(0, readW);
readH = MAX2(0, readH);
/* alloc temporary texture */
pt = alloc_texture(st, width, height, texFormat);
if (!pt)
return;
sv[0] = st_create_texture_sampler_view(st->pipe, pt);
if (!sv[0]) {
pipe_resource_reference(&pt, NULL);
return;
}
/* Make temporary texture which is a copy of the src region.
*/
if (srcFormat == texFormat) {
struct pipe_box src_box;
u_box_2d(readX, readY, readW, readH, &src_box);
/* copy source framebuffer surface into mipmap/texture */
pipe->resource_copy_region(pipe,
pt, /* dest tex */
0, /* dest lvl */
pack.SkipPixels, pack.SkipRows, 0, /* dest pos */
rbRead->texture, /* src tex */
rbRead->rtt_level, /* src lvl */
&src_box);
}
else {
/* CPU-based fallback/conversion */
struct pipe_transfer *ptRead =
pipe_get_transfer(st->pipe, rbRead->texture,
rbRead->rtt_level,
rbRead->rtt_face + rbRead->rtt_slice,
PIPE_TRANSFER_READ,
readX, readY, readW, readH);
struct pipe_transfer *ptTex;
enum pipe_transfer_usage transfer_usage;
if (ST_DEBUG & DEBUG_FALLBACK)
debug_printf("%s: fallback processing\n", __FUNCTION__);
if (type == GL_DEPTH && util_format_is_depth_and_stencil(pt->format))
transfer_usage = PIPE_TRANSFER_READ_WRITE;
else
transfer_usage = PIPE_TRANSFER_WRITE;
ptTex = pipe_get_transfer(st->pipe, pt, 0, 0, transfer_usage,
0, 0, width, height);
/* copy image from ptRead surface to ptTex surface */
if (type == GL_COLOR) {
/* alternate path using get/put_tile() */
GLfloat *buf = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat));
enum pipe_format readFormat, drawFormat;
readFormat = util_format_linear(rbRead->texture->format);
drawFormat = util_format_linear(pt->format);
pipe_get_tile_rgba_format(pipe, ptRead, 0, 0, readW, readH,
readFormat, buf);
pipe_put_tile_rgba_format(pipe, ptTex, pack.SkipPixels, pack.SkipRows,
readW, readH, drawFormat, buf);
free(buf);
}
else {
/* GL_DEPTH */
GLuint *buf = (GLuint *) malloc(width * height * sizeof(GLuint));
pipe_get_tile_z(pipe, ptRead, 0, 0, readW, readH, buf);
pipe_put_tile_z(pipe, ptTex, pack.SkipPixels, pack.SkipRows,
readW, readH, buf);
free(buf);
}
pipe->transfer_destroy(pipe, ptRead);
pipe->transfer_destroy(pipe, ptTex);
}
/* OK, the texture 'pt' contains the src image/pixels. Now draw a
* textured quad with that texture.
*/
draw_textured_quad(ctx, dstx, dsty, ctx->Current.RasterPos[2],
width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY,
sv,
num_sampler_view,
driver_vp,
driver_fp,
color, invertTex, GL_FALSE, GL_FALSE);
pipe_resource_reference(&pt, NULL);
pipe_sampler_view_reference(&sv[0], NULL);
}
/**
* Try to do a glCopyPixels for simple cases with a blit by calling
* pipe->resource_copy_region().
*
* We can do this when we're copying color pixels (depth/stencil
* eventually) with no pixel zoom, no pixel transfer ops, no
* per-fragment ops, the src/dest regions don't overlap and the
* src/dest pixel formats are the same.
*/
static GLboolean
blit_copy_pixels(struct gl_context *ctx, GLint srcx, GLint srcy,
GLsizei width, GLsizei height,
GLint dstx, GLint dsty, GLenum type)
{
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct gl_pixelstore_attrib pack, unpack;
GLint readX, readY, readW, readH;
if (type == GL_COLOR &&
ctx->Pixel.ZoomX == 1.0 &&
ctx->Pixel.ZoomY == 1.0 &&
ctx->_ImageTransferState == 0x0 &&
!ctx->Color.BlendEnabled &&
!ctx->Color.AlphaEnabled &&
!ctx->Depth.Test &&
!ctx->Fog.Enabled &&
!ctx->Stencil.Enabled &&
!ctx->FragmentProgram.Enabled &&
!ctx->VertexProgram.Enabled &&
!ctx->Shader.CurrentFragmentProgram &&
st_fb_orientation(ctx->ReadBuffer) == st_fb_orientation(ctx->DrawBuffer) &&
ctx->DrawBuffer->_NumColorDrawBuffers == 1 &&
!ctx->Query.CondRenderQuery) {
struct st_renderbuffer *rbRead, *rbDraw;
GLint drawX, drawY;
/*
* Clip the read region against the src buffer bounds.
* We'll still allocate a temporary buffer/texture for the original
* src region size but we'll only read the region which is on-screen.
* This may mean that we draw garbage pixels into the dest region, but
* that's expected.
*/
readX = srcx;
readY = srcy;
readW = width;
readH = height;
pack = ctx->DefaultPacking;
if (!_mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack))
return GL_TRUE; /* all done */
/* clip against dest buffer bounds and scissor box */
drawX = dstx + pack.SkipPixels;
drawY = dsty + pack.SkipRows;
unpack = pack;
if (!_mesa_clip_drawpixels(ctx, &drawX, &drawY, &readW, &readH, &unpack))
return GL_TRUE; /* all done */
readX = readX - pack.SkipPixels + unpack.SkipPixels;
readY = readY - pack.SkipRows + unpack.SkipRows;
rbRead = st_get_color_read_renderbuffer(ctx);
rbDraw = st_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
if ((rbRead != rbDraw ||
!regions_overlap(readX, readY, drawX, drawY, readW, readH)) &&
rbRead->Base.Format == rbDraw->Base.Format) {
struct pipe_box srcBox;
/* flip src/dst position if needed */
if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
/* both buffers will have the same orientation */
readY = ctx->ReadBuffer->Height - readY - readH;
drawY = ctx->DrawBuffer->Height - drawY - readH;
}
u_box_2d(readX, readY, readW, readH, &srcBox);
pipe->resource_copy_region(pipe,
rbDraw->texture,
rbDraw->rtt_level, drawX, drawY, 0,
rbRead->texture,
rbRead->rtt_level, &srcBox);
return GL_TRUE;
}
}
return GL_FALSE;
}
/**
* Software fallback for glCopyPixels(GL_STENCIL).
*/
static void
copy_stencil_pixels(struct gl_context *ctx, GLint srcx, GLint srcy,
GLsizei width, GLsizei height,
GLint dstx, GLint dsty)
{
struct st_renderbuffer *rbDraw;
struct pipe_context *pipe = st_context(ctx)->pipe;
enum pipe_transfer_usage usage;
struct pipe_transfer *ptDraw;
ubyte *drawMap;
ubyte *buffer;
int i;
buffer = malloc(width * height * sizeof(ubyte));
if (!buffer) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels(stencil)");
return;
}
/* Get the dest renderbuffer. If there's a wrapper, use the
* underlying renderbuffer.
*/
rbDraw = st_renderbuffer(ctx->DrawBuffer->_StencilBuffer);
if (rbDraw->Base.Wrapped)
rbDraw = st_renderbuffer(rbDraw->Base.Wrapped);
/* this will do stencil pixel transfer ops */
st_read_stencil_pixels(ctx, srcx, srcy, width, height,
GL_STENCIL_INDEX, GL_UNSIGNED_BYTE,
&ctx->DefaultPacking, buffer);
if (0) {
/* debug code: dump stencil values */
GLint row, col;
for (row = 0; row < height; row++) {
printf("%3d: ", row);
for (col = 0; col < width; col++) {
printf("%02x ", buffer[col + row * width]);
}
printf("\n");
}
}
if (util_format_get_component_bits(rbDraw->format,
UTIL_FORMAT_COLORSPACE_ZS, 0) != 0)
usage = PIPE_TRANSFER_READ_WRITE;
else
usage = PIPE_TRANSFER_WRITE;
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
dsty = rbDraw->Base.Height - dsty - height;
}
ptDraw = pipe_get_transfer(pipe,
rbDraw->texture,
rbDraw->rtt_level,
rbDraw->rtt_face + rbDraw->rtt_slice,
usage, dstx, dsty,
width, height);
assert(util_format_get_blockwidth(ptDraw->resource->format) == 1);
assert(util_format_get_blockheight(ptDraw->resource->format) == 1);
/* map the stencil buffer */
drawMap = pipe_transfer_map(pipe, ptDraw);
/* draw */
/* XXX PixelZoom not handled yet */
for (i = 0; i < height; i++) {
ubyte *dst;
const ubyte *src;
int y;
y = i;
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
y = height - y - 1;
}
dst = drawMap + y * ptDraw->stride;
src = buffer + i * width;
switch (ptDraw->resource->format) {
case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
{
uint *dst4 = (uint *) dst;
int j;
assert(usage == PIPE_TRANSFER_READ_WRITE);
for (j = 0; j < width; j++) {
*dst4 = (*dst4 & 0xffffff) | (src[j] << 24);
dst4++;
}
}
break;
case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
{
uint *dst4 = (uint *) dst;
int j;
assert(usage == PIPE_TRANSFER_READ_WRITE);
for (j = 0; j < width; j++) {
*dst4 = (*dst4 & 0xffffff00) | (src[j] & 0xff);
dst4++;
}
}
break;
case PIPE_FORMAT_S8_USCALED:
assert(usage == PIPE_TRANSFER_WRITE);
memcpy(dst, src, width);
break;
default:
assert(0);
}
}
free(buffer);
/* unmap the stencil buffer */
pipe_transfer_unmap(pipe, ptDraw);
pipe->transfer_destroy(pipe, ptDraw);
}
/**
* Do glClear by drawing a quadrilateral.
* The vertices of the quad will be computed from the
* ctx->DrawBuffer->_X/Ymin/max fields.
*/
static void
clear_with_quad(struct gl_context *ctx,
GLboolean color, GLboolean depth, GLboolean stencil)
{
struct st_context *st = st_context(ctx);
const struct gl_framebuffer *fb = ctx->DrawBuffer;
const GLfloat fb_width = (GLfloat) fb->Width;
const GLfloat fb_height = (GLfloat) fb->Height;
const GLfloat x0 = (GLfloat) ctx->DrawBuffer->_Xmin / fb_width * 2.0f - 1.0f;
const GLfloat x1 = (GLfloat) ctx->DrawBuffer->_Xmax / fb_width * 2.0f - 1.0f;
const GLfloat y0 = (GLfloat) ctx->DrawBuffer->_Ymin / fb_height * 2.0f - 1.0f;
const GLfloat y1 = (GLfloat) ctx->DrawBuffer->_Ymax / fb_height * 2.0f - 1.0f;
union pipe_color_union clearColor;
/*
printf("%s %s%s%s %f,%f %f,%f\n", __FUNCTION__,
color ? "color, " : "",
depth ? "depth, " : "",
stencil ? "stencil" : "",
x0, y0,
x1, y1);
*/
cso_save_blend(st->cso_context);
cso_save_stencil_ref(st->cso_context);
cso_save_depth_stencil_alpha(st->cso_context);
cso_save_rasterizer(st->cso_context);
cso_save_viewport(st->cso_context);
cso_save_fragment_shader(st->cso_context);
cso_save_stream_outputs(st->cso_context);
cso_save_vertex_shader(st->cso_context);
cso_save_geometry_shader(st->cso_context);
cso_save_vertex_elements(st->cso_context);
cso_save_vertex_buffers(st->cso_context);
/* blend state: RGBA masking */
{
struct pipe_blend_state blend;
memset(&blend, 0, sizeof(blend));
blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
if (color) {
if (ctx->Color.ColorMask[0][0])
blend.rt[0].colormask |= PIPE_MASK_R;
if (ctx->Color.ColorMask[0][1])
blend.rt[0].colormask |= PIPE_MASK_G;
if (ctx->Color.ColorMask[0][2])
blend.rt[0].colormask |= PIPE_MASK_B;
if (ctx->Color.ColorMask[0][3])
blend.rt[0].colormask |= PIPE_MASK_A;
if (st->ctx->Color.DitherFlag)
blend.dither = 1;
}
cso_set_blend(st->cso_context, &blend);
}
/* depth_stencil state: always pass/set to ref value */
{
struct pipe_depth_stencil_alpha_state depth_stencil;
memset(&depth_stencil, 0, sizeof(depth_stencil));
if (depth) {
depth_stencil.depth.enabled = 1;
depth_stencil.depth.writemask = 1;
depth_stencil.depth.func = PIPE_FUNC_ALWAYS;
}
if (stencil) {
struct pipe_stencil_ref stencil_ref;
memset(&stencil_ref, 0, sizeof(stencil_ref));
depth_stencil.stencil[0].enabled = 1;
depth_stencil.stencil[0].func = PIPE_FUNC_ALWAYS;
depth_stencil.stencil[0].fail_op = PIPE_STENCIL_OP_REPLACE;
depth_stencil.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE;
depth_stencil.stencil[0].zfail_op = PIPE_STENCIL_OP_REPLACE;
depth_stencil.stencil[0].valuemask = 0xff;
depth_stencil.stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff;
stencil_ref.ref_value[0] = ctx->Stencil.Clear;
cso_set_stencil_ref(st->cso_context, &stencil_ref);
}
cso_set_depth_stencil_alpha(st->cso_context, &depth_stencil);
}
cso_set_vertex_elements(st->cso_context, 2, st->velems_util_draw);
cso_set_stream_outputs(st->cso_context, 0, NULL, 0);
cso_set_rasterizer(st->cso_context, &st->clear.raster);
/* viewport state: viewport matching window dims */
{
const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP);
struct pipe_viewport_state vp;
vp.scale[0] = 0.5f * fb_width;
vp.scale[1] = fb_height * (invert ? -0.5f : 0.5f);
vp.scale[2] = 1.0f;
vp.scale[3] = 1.0f;
vp.translate[0] = 0.5f * fb_width;
vp.translate[1] = 0.5f * fb_height;
vp.translate[2] = 0.0f;
vp.translate[3] = 0.0f;
cso_set_viewport(st->cso_context, &vp);
}
set_fragment_shader(st);
set_vertex_shader(st);
cso_set_geometry_shader_handle(st->cso_context, NULL);
if (ctx->DrawBuffer->_ColorDrawBuffers[0]) {
st_translate_color(ctx->Color.ClearColor.f,
ctx->DrawBuffer->_ColorDrawBuffers[0]->_BaseFormat,
clearColor.f);
}
/* draw quad matching scissor rect */
draw_quad(st, x0, y0, x1, y1, (GLfloat) ctx->Depth.Clear, &clearColor);
/* Restore pipe state */
cso_restore_blend(st->cso_context);
cso_restore_stencil_ref(st->cso_context);
cso_restore_depth_stencil_alpha(st->cso_context);
cso_restore_rasterizer(st->cso_context);
cso_restore_viewport(st->cso_context);
cso_restore_fragment_shader(st->cso_context);
cso_restore_vertex_shader(st->cso_context);
cso_restore_geometry_shader(st->cso_context);
cso_restore_vertex_elements(st->cso_context);
cso_restore_vertex_buffers(st->cso_context);
cso_restore_stream_outputs(st->cso_context);
}
/**
* Do glClear by drawing a quadrilateral.
* The vertices of the quad will be computed from the
* ctx->DrawBuffer->_X/Ymin/max fields.
*/
static void
clear_with_quad(GLcontext *ctx,
GLboolean color, GLboolean depth, GLboolean stencil)
{
struct st_context *st = ctx->st;
const GLfloat x0 = (GLfloat) ctx->DrawBuffer->_Xmin;
const GLfloat x1 = (GLfloat) ctx->DrawBuffer->_Xmax;
GLfloat y0, y1;
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
y0 = (GLfloat) (ctx->DrawBuffer->Height - ctx->DrawBuffer->_Ymax);
y1 = (GLfloat) (ctx->DrawBuffer->Height - ctx->DrawBuffer->_Ymin);
}
else {
y0 = (GLfloat) ctx->DrawBuffer->_Ymin;
y1 = (GLfloat) ctx->DrawBuffer->_Ymax;
}
/*
printf("%s %s%s%s %f,%f %f,%f\n", __FUNCTION__,
color ? "color, " : "",
depth ? "depth, " : "",
stencil ? "stencil" : "",
x0, y0,
x1, y1);
*/
cso_save_blend(st->cso_context);
cso_save_depth_stencil_alpha(st->cso_context);
cso_save_rasterizer(st->cso_context);
cso_save_fragment_shader(st->cso_context);
cso_save_vertex_shader(st->cso_context);
/* blend state: RGBA masking */
{
struct pipe_blend_state blend;
memset(&blend, 0, sizeof(blend));
blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
if (color) {
if (ctx->Color.ColorMask[0])
blend.colormask |= PIPE_MASK_R;
if (ctx->Color.ColorMask[1])
blend.colormask |= PIPE_MASK_G;
if (ctx->Color.ColorMask[2])
blend.colormask |= PIPE_MASK_B;
if (ctx->Color.ColorMask[3])
blend.colormask |= PIPE_MASK_A;
if (st->ctx->Color.DitherFlag)
blend.dither = 1;
}
cso_set_blend(st->cso_context, &blend);
}
/* depth_stencil state: always pass/set to ref value */
{
struct pipe_depth_stencil_alpha_state depth_stencil;
memset(&depth_stencil, 0, sizeof(depth_stencil));
if (depth) {
depth_stencil.depth.enabled = 1;
depth_stencil.depth.writemask = 1;
depth_stencil.depth.func = PIPE_FUNC_ALWAYS;
}
if (stencil) {
depth_stencil.stencil[0].enabled = 1;
depth_stencil.stencil[0].func = PIPE_FUNC_ALWAYS;
depth_stencil.stencil[0].fail_op = PIPE_STENCIL_OP_REPLACE;
depth_stencil.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE;
depth_stencil.stencil[0].zfail_op = PIPE_STENCIL_OP_REPLACE;
depth_stencil.stencil[0].ref_value = ctx->Stencil.Clear;
depth_stencil.stencil[0].valuemask = 0xff;
depth_stencil.stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff;
}
cso_set_depth_stencil_alpha(st->cso_context, &depth_stencil);
}
cso_set_rasterizer(st->cso_context, &st->clear.raster);
cso_set_fragment_shader_handle(st->cso_context, st->clear.fs);
cso_set_vertex_shader_handle(st->cso_context, st->clear.vs);
/* draw quad matching scissor rect (XXX verify coord round-off) */
draw_quad(ctx, x0, y0, x1, y1, (GLfloat) ctx->Depth.Clear, ctx->Color.ClearColor);
/* Restore pipe state */
cso_restore_blend(st->cso_context);
cso_restore_depth_stencil_alpha(st->cso_context);
cso_restore_rasterizer(st->cso_context);
cso_restore_fragment_shader(st->cso_context);
cso_restore_vertex_shader(st->cso_context);
}
/**
* Update framebuffer state (color, depth, stencil, etc. buffers)
*/
static void
update_framebuffer_state( struct st_context *st )
{
struct pipe_framebuffer_state *framebuffer = &st->state.framebuffer;
struct gl_framebuffer *fb = st->ctx->DrawBuffer;
struct st_renderbuffer *strb;
GLuint i;
st_flush_bitmap_cache(st);
st->state.fb_orientation = st_fb_orientation(fb);
framebuffer->width = fb->Width;
framebuffer->height = fb->Height;
/*printf("------ fb size %d x %d\n", fb->Width, fb->Height);*/
/* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state
* to determine which surfaces to draw to
*/
framebuffer->nr_cbufs = fb->_NumColorDrawBuffers;
for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
pipe_surface_reference(&framebuffer->cbufs[i], NULL);
strb = st_renderbuffer(fb->_ColorDrawBuffers[i]);
if (strb) {
if (strb->is_rtt ||
(strb->texture && util_format_is_srgb(strb->texture->format))) {
/* rendering to a GL texture, may have to update surface */
st_update_renderbuffer_surface(st, strb);
}
if (strb->surface) {
pipe_surface_reference(&framebuffer->cbufs[i], strb->surface);
}
strb->defined = GL_TRUE; /* we'll be drawing something */
}
}
for (i = framebuffer->nr_cbufs; i < PIPE_MAX_COLOR_BUFS; i++) {
pipe_surface_reference(&framebuffer->cbufs[i], NULL);
}
/*
* Depth/Stencil renderbuffer/surface.
*/
strb = st_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
if (strb) {
if (strb->is_rtt) {
/* rendering to a GL texture, may have to update surface */
st_update_renderbuffer_surface(st, strb);
}
pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
}
else {
strb = st_renderbuffer(fb->Attachment[BUFFER_STENCIL].Renderbuffer);
if (strb) {
assert(strb->surface);
pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
}
else
pipe_surface_reference(&framebuffer->zsbuf, NULL);
}
#ifdef DEBUG
/* Make sure the resource binding flags were set properly */
for (i = 0; i < framebuffer->nr_cbufs; i++) {
assert(!framebuffer->cbufs[i] ||
framebuffer->cbufs[i]->texture->bind & PIPE_BIND_RENDER_TARGET);
}
if (framebuffer->zsbuf) {
assert(framebuffer->zsbuf->texture->bind & PIPE_BIND_DEPTH_STENCIL);
}
#endif
cso_set_framebuffer(st->cso_context, framebuffer);
}
static void update_raster_state( struct st_context *st )
{
struct gl_context *ctx = st->ctx;
struct pipe_rasterizer_state *raster = &st->state.rasterizer;
const struct gl_vertex_program *vertProg = ctx->VertexProgram._Current;
const struct gl_fragment_program *fragProg = ctx->FragmentProgram._Current;
uint i;
memset(raster, 0, sizeof(*raster));
/* _NEW_POLYGON, _NEW_BUFFERS
*/
{
raster->front_ccw = (ctx->Polygon.FrontFace == GL_CCW);
/* _NEW_TRANSFORM */
if (ctx->Transform.ClipOrigin == GL_UPPER_LEFT) {
raster->front_ccw ^= 1;
}
/*
* Gallium's surfaces are Y=0=TOP orientation. OpenGL is the
* opposite. Window system surfaces are Y=0=TOP. Mesa's FBOs
* must match OpenGL conventions so FBOs use Y=0=BOTTOM. In that
* case, we must invert Y and flip the notion of front vs. back.
*/
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM) {
/* Drawing to an FBO. The viewport will be inverted. */
raster->front_ccw ^= 1;
}
}
/* _NEW_LIGHT
*/
raster->flatshade = ctx->Light.ShadeModel == GL_FLAT;
raster->flatshade_first = ctx->Light.ProvokingVertex ==
GL_FIRST_VERTEX_CONVENTION_EXT;
/* _NEW_LIGHT | _NEW_PROGRAM */
raster->light_twoside = ctx->VertexProgram._TwoSideEnabled;
/*_NEW_LIGHT | _NEW_BUFFERS */
raster->clamp_vertex_color = !st->clamp_vert_color_in_shader &&
ctx->Light._ClampVertexColor;
/* _NEW_POLYGON
*/
if (ctx->Polygon.CullFlag) {
switch (ctx->Polygon.CullFaceMode) {
case GL_FRONT:
raster->cull_face = PIPE_FACE_FRONT;
break;
case GL_BACK:
raster->cull_face = PIPE_FACE_BACK;
break;
case GL_FRONT_AND_BACK:
raster->cull_face = PIPE_FACE_FRONT_AND_BACK;
break;
}
}
else {
raster->cull_face = PIPE_FACE_NONE;
}
/* _NEW_POLYGON
*/
{
if (ST_DEBUG & DEBUG_WIREFRAME) {
raster->fill_front = PIPE_POLYGON_MODE_LINE;
raster->fill_back = PIPE_POLYGON_MODE_LINE;
}
else {
raster->fill_front = translate_fill( ctx->Polygon.FrontMode );
raster->fill_back = translate_fill( ctx->Polygon.BackMode );
}
/* Simplify when culling is active:
*/
if (raster->cull_face & PIPE_FACE_FRONT) {
raster->fill_front = raster->fill_back;
}
if (raster->cull_face & PIPE_FACE_BACK) {
raster->fill_back = raster->fill_front;
}
}
/* _NEW_POLYGON
*/
if (ctx->Polygon.OffsetPoint ||
ctx->Polygon.OffsetLine ||
ctx->Polygon.OffsetFill) {
raster->offset_point = ctx->Polygon.OffsetPoint;
raster->offset_line = ctx->Polygon.OffsetLine;
raster->offset_tri = ctx->Polygon.OffsetFill;
raster->offset_units = ctx->Polygon.OffsetUnits;
raster->offset_scale = ctx->Polygon.OffsetFactor;
raster->offset_clamp = ctx->Polygon.OffsetClamp;
}
raster->poly_smooth = ctx->Polygon.SmoothFlag;
raster->poly_stipple_enable = ctx->Polygon.StippleFlag;
/* _NEW_POINT
*/
raster->point_size = ctx->Point.Size;
raster->point_smooth = !ctx->Point.PointSprite && ctx->Point.SmoothFlag;
/* _NEW_POINT | _NEW_PROGRAM
*/
if (ctx->Point.PointSprite) {
/* origin */
if ((ctx->Point.SpriteOrigin == GL_UPPER_LEFT) ^
(st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM))
raster->sprite_coord_mode = PIPE_SPRITE_COORD_UPPER_LEFT;
else
raster->sprite_coord_mode = PIPE_SPRITE_COORD_LOWER_LEFT;
/* Coord replacement flags. If bit 'k' is set that means
* that we need to replace GENERIC[k] attrib with an automatically
* computed texture coord.
*/
for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++) {
if (ctx->Point.CoordReplace[i]) {
raster->sprite_coord_enable |= 1 << i;
}
}
if (!st->needs_texcoord_semantic &&
fragProg->Base.InputsRead & VARYING_BIT_PNTC) {
raster->sprite_coord_enable |=
1 << st_get_generic_varying_index(st, VARYING_SLOT_PNTC);
}
raster->point_quad_rasterization = 1;
}
/* ST_NEW_VERTEX_PROGRAM
*/
if (vertProg) {
if (vertProg->Base.Id == 0) {
if (vertProg->Base.OutputsWritten & BITFIELD64_BIT(VARYING_SLOT_PSIZ)) {
/* generated program which emits point size */
raster->point_size_per_vertex = TRUE;
}
}
else if (ctx->API != API_OPENGLES2) {
/* PointSizeEnabled is always set in ES2 contexts */
raster->point_size_per_vertex = ctx->VertexProgram.PointSizeEnabled;
}
else {
/* ST_NEW_TESSEVAL_PROGRAM | ST_NEW_GEOMETRY_PROGRAM */
/* We have to check the last bound stage and see if it writes psize */
struct gl_program *last = NULL;
if (ctx->GeometryProgram._Current)
last = &ctx->GeometryProgram._Current->Base;
else if (ctx->TessEvalProgram._Current)
last = &ctx->TessEvalProgram._Current->Base;
else if (ctx->VertexProgram._Current)
last = &ctx->VertexProgram._Current->Base;
if (last)
raster->point_size_per_vertex =
!!(last->OutputsWritten & BITFIELD64_BIT(VARYING_SLOT_PSIZ));
}
}
if (!raster->point_size_per_vertex) {
/* clamp size now */
raster->point_size = CLAMP(ctx->Point.Size,
ctx->Point.MinSize,
ctx->Point.MaxSize);
}
/* _NEW_LINE
*/
raster->line_smooth = ctx->Line.SmoothFlag;
if (ctx->Line.SmoothFlag) {
raster->line_width = CLAMP(ctx->Line.Width,
ctx->Const.MinLineWidthAA,
ctx->Const.MaxLineWidthAA);
}
else {
raster->line_width = CLAMP(ctx->Line.Width,
ctx->Const.MinLineWidth,
ctx->Const.MaxLineWidth);
}
raster->line_stipple_enable = ctx->Line.StippleFlag;
raster->line_stipple_pattern = ctx->Line.StipplePattern;
/* GL stipple factor is in [1,256], remap to [0, 255] here */
raster->line_stipple_factor = ctx->Line.StippleFactor - 1;
/* _NEW_MULTISAMPLE */
raster->multisample = _mesa_is_multisample_enabled(ctx);
/* _NEW_MULTISAMPLE | _NEW_BUFFERS */
raster->force_persample_interp =
!st->force_persample_in_shader &&
_mesa_is_multisample_enabled(ctx) &&
ctx->Multisample.SampleShading &&
ctx->Multisample.MinSampleShadingValue *
_mesa_geometric_samples(ctx->DrawBuffer) > 1;
/* _NEW_SCISSOR */
raster->scissor = ctx->Scissor.EnableFlags;
/* _NEW_FRAG_CLAMP */
raster->clamp_fragment_color = !st->clamp_frag_color_in_shader &&
ctx->Color._ClampFragmentColor;
raster->half_pixel_center = 1;
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP)
raster->bottom_edge_rule = 1;
/* _NEW_TRANSFORM */
if (ctx->Transform.ClipOrigin == GL_UPPER_LEFT)
raster->bottom_edge_rule ^= 1;
/* ST_NEW_RASTERIZER */
raster->rasterizer_discard = ctx->RasterDiscard;
if (st->edgeflag_culls_prims) {
/* All edge flags are FALSE. Cull the affected faces. */
if (raster->fill_front != PIPE_POLYGON_MODE_FILL)
raster->cull_face |= PIPE_FACE_FRONT;
if (raster->fill_back != PIPE_POLYGON_MODE_FILL)
raster->cull_face |= PIPE_FACE_BACK;
}
/* _NEW_TRANSFORM */
raster->depth_clip = !ctx->Transform.DepthClamp;
raster->clip_plane_enable = ctx->Transform.ClipPlanesEnabled;
raster->clip_halfz = (ctx->Transform.ClipDepthMode == GL_ZERO_TO_ONE);
cso_set_rasterizer(st->cso_context, raster);
}
static void update_raster_state( struct st_context *st )
{
struct gl_context *ctx = st->ctx;
struct pipe_rasterizer_state *raster = &st->state.rasterizer;
const struct gl_vertex_program *vertProg = ctx->VertexProgram._Current;
const struct gl_fragment_program *fragProg = ctx->FragmentProgram._Current;
uint i;
memset(raster, 0, sizeof(*raster));
/* _NEW_POLYGON, _NEW_BUFFERS
*/
{
raster->front_ccw = (ctx->Polygon.FrontFace == GL_CCW);
/*
* Gallium's surfaces are Y=0=TOP orientation. OpenGL is the
* opposite. Window system surfaces are Y=0=TOP. Mesa's FBOs
* must match OpenGL conventions so FBOs use Y=0=BOTTOM. In that
* case, we must invert Y and flip the notion of front vs. back.
*/
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM) {
/* Drawing to an FBO. The viewport will be inverted. */
raster->front_ccw ^= 1;
}
}
/* _NEW_LIGHT
*/
if (ctx->Light.ShadeModel == GL_FLAT)
raster->flatshade = 1;
if (ctx->Light.ProvokingVertex == GL_FIRST_VERTEX_CONVENTION_EXT)
raster->flatshade_first = 1;
/* _NEW_LIGHT | _NEW_PROGRAM */
raster->light_twoside = ctx->VertexProgram._TwoSideEnabled;
/*_NEW_LIGHT | _NEW_BUFFERS */
raster->clamp_vertex_color = !st->clamp_vert_color_in_shader &&
ctx->Light._ClampVertexColor;
/* _NEW_POLYGON
*/
if (ctx->Polygon.CullFlag) {
switch (ctx->Polygon.CullFaceMode) {
case GL_FRONT:
raster->cull_face = PIPE_FACE_FRONT;
break;
case GL_BACK:
raster->cull_face = PIPE_FACE_BACK;
break;
case GL_FRONT_AND_BACK:
raster->cull_face = PIPE_FACE_FRONT_AND_BACK;
break;
}
}
else {
raster->cull_face = PIPE_FACE_NONE;
}
/* _NEW_POLYGON
*/
{
raster->fill_front = translate_fill( ctx->Polygon.FrontMode );
raster->fill_back = translate_fill( ctx->Polygon.BackMode );
/* Simplify when culling is active:
*/
if (raster->cull_face & PIPE_FACE_FRONT) {
raster->fill_front = raster->fill_back;
}
if (raster->cull_face & PIPE_FACE_BACK) {
raster->fill_back = raster->fill_front;
}
}
/* _NEW_POLYGON
*/
if (ctx->Polygon.OffsetUnits != 0.0 ||
ctx->Polygon.OffsetFactor != 0.0) {
raster->offset_point = ctx->Polygon.OffsetPoint;
raster->offset_line = ctx->Polygon.OffsetLine;
raster->offset_tri = ctx->Polygon.OffsetFill;
}
if (ctx->Polygon.OffsetPoint ||
ctx->Polygon.OffsetLine ||
ctx->Polygon.OffsetFill) {
raster->offset_units = ctx->Polygon.OffsetUnits;
raster->offset_scale = ctx->Polygon.OffsetFactor;
}
if (ctx->Polygon.SmoothFlag)
raster->poly_smooth = 1;
if (ctx->Polygon.StippleFlag)
raster->poly_stipple_enable = 1;
/* _NEW_POINT
*/
raster->point_size = ctx->Point.Size;
if (!ctx->Point.PointSprite && ctx->Point.SmoothFlag)
raster->point_smooth = 1;
/* _NEW_POINT | _NEW_PROGRAM
*/
if (ctx->Point.PointSprite) {
/* origin */
if ((ctx->Point.SpriteOrigin == GL_UPPER_LEFT) ^
(st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM))
raster->sprite_coord_mode = PIPE_SPRITE_COORD_UPPER_LEFT;
else
raster->sprite_coord_mode = PIPE_SPRITE_COORD_LOWER_LEFT;
/* Coord replacement flags. If bit 'k' is set that means
* that we need to replace GENERIC[k] attrib with an automatically
* computed texture coord.
*/
for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++) {
if (ctx->Point.CoordReplace[i]) {
raster->sprite_coord_enable |= 1 << i;
}
}
if (fragProg->Base.InputsRead & FRAG_BIT_PNTC) {
raster->sprite_coord_enable |=
1 << (FRAG_ATTRIB_PNTC - FRAG_ATTRIB_TEX0);
}
raster->point_quad_rasterization = 1;
}
/* ST_NEW_VERTEX_PROGRAM
*/
if (vertProg) {
if (vertProg->Base.Id == 0) {
if (vertProg->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_PSIZ)) {
/* generated program which emits point size */
raster->point_size_per_vertex = TRUE;
}
}
else if (ctx->VertexProgram.PointSizeEnabled) {
/* user-defined program and GL_VERTEX_PROGRAM_POINT_SIZE set */
raster->point_size_per_vertex = ctx->VertexProgram.PointSizeEnabled;
}
}
if (!raster->point_size_per_vertex) {
/* clamp size now */
raster->point_size = CLAMP(ctx->Point.Size,
ctx->Point.MinSize,
ctx->Point.MaxSize);
}
/* _NEW_LINE
*/
raster->line_smooth = ctx->Line.SmoothFlag;
if (ctx->Line.SmoothFlag) {
raster->line_width = CLAMP(ctx->Line.Width,
ctx->Const.MinLineWidthAA,
ctx->Const.MaxLineWidthAA);
}
else {
raster->line_width = CLAMP(ctx->Line.Width,
ctx->Const.MinLineWidth,
ctx->Const.MaxLineWidth);
}
raster->line_stipple_enable = ctx->Line.StippleFlag;
raster->line_stipple_pattern = ctx->Line.StipplePattern;
/* GL stipple factor is in [1,256], remap to [0, 255] here */
raster->line_stipple_factor = ctx->Line.StippleFactor - 1;
/* _NEW_MULTISAMPLE */
if (ctx->Multisample._Enabled || st->force_msaa)
raster->multisample = 1;
/* _NEW_SCISSOR */
if (ctx->Scissor.Enabled)
raster->scissor = 1;
/* _NEW_FRAG_CLAMP */
raster->clamp_fragment_color = !st->clamp_frag_color_in_shader &&
ctx->Color._ClampFragmentColor;
raster->gl_rasterization_rules = 1;
/* _NEW_RASTERIZER_DISCARD */
raster->rasterizer_discard = ctx->RasterDiscard;
/* _NEW_TRANSFORM */
raster->depth_clip = ctx->Transform.DepthClamp == GL_FALSE;
raster->clip_plane_enable = ctx->Transform.ClipPlanesEnabled;
cso_set_rasterizer(st->cso_context, raster);
}
static void
st_DrawTex(struct gl_context *ctx, GLfloat x, GLfloat y, GLfloat z,
GLfloat width, GLfloat height)
{
struct st_context *st = ctx->st;
struct pipe_context *pipe = st->pipe;
struct cso_context *cso = ctx->st->cso_context;
struct pipe_resource *vbuffer;
struct pipe_transfer *vbuffer_transfer;
GLuint i, numTexCoords, numAttribs;
GLboolean emitColor;
uint semantic_names[2 + MAX_TEXTURE_UNITS];
uint semantic_indexes[2 + MAX_TEXTURE_UNITS];
struct pipe_vertex_element velements[2 + MAX_TEXTURE_UNITS];
GLbitfield inputs = VERT_BIT_POS;
st_validate_state(st);
/* determine if we need vertex color */
if (ctx->FragmentProgram._Current->Base.InputsRead & FRAG_BIT_COL0)
emitColor = GL_TRUE;
else
emitColor = GL_FALSE;
/* determine how many enabled sets of texcoords */
numTexCoords = 0;
for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
if (ctx->Texture.Unit[i]._ReallyEnabled & TEXTURE_2D_BIT) {
inputs |= VERT_BIT_TEX(i);
numTexCoords++;
}
}
/* total number of attributes per vertex */
numAttribs = 1 + emitColor + numTexCoords;
/* create the vertex buffer */
vbuffer = pipe_buffer_create(pipe->screen, PIPE_BIND_VERTEX_BUFFER,
PIPE_USAGE_STREAM,
numAttribs * 4 * 4 * sizeof(GLfloat));
/* load vertex buffer */
{
#define SET_ATTRIB(VERT, ATTR, X, Y, Z, W) \
do { \
GLuint k = (((VERT) * numAttribs + (ATTR)) * 4); \
assert(k < 4 * 4 * numAttribs); \
vbuf[k + 0] = X; \
vbuf[k + 1] = Y; \
vbuf[k + 2] = Z; \
vbuf[k + 3] = W; \
} while (0)
const GLfloat x0 = x, y0 = y, x1 = x + width, y1 = y + height;
GLfloat *vbuf = (GLfloat *) pipe_buffer_map(pipe, vbuffer,
PIPE_TRANSFER_WRITE,
&vbuffer_transfer);
GLuint attr;
z = CLAMP(z, 0.0f, 1.0f);
/* positions (in clip coords) */
{
const struct gl_framebuffer *fb = st->ctx->DrawBuffer;
const GLfloat fb_width = (GLfloat)fb->Width;
const GLfloat fb_height = (GLfloat)fb->Height;
const GLfloat clip_x0 = (GLfloat)(x0 / fb_width * 2.0 - 1.0);
const GLfloat clip_y0 = (GLfloat)(y0 / fb_height * 2.0 - 1.0);
const GLfloat clip_x1 = (GLfloat)(x1 / fb_width * 2.0 - 1.0);
const GLfloat clip_y1 = (GLfloat)(y1 / fb_height * 2.0 - 1.0);
SET_ATTRIB(0, 0, clip_x0, clip_y0, z, 1.0f); /* lower left */
SET_ATTRIB(1, 0, clip_x1, clip_y0, z, 1.0f); /* lower right */
SET_ATTRIB(2, 0, clip_x1, clip_y1, z, 1.0f); /* upper right */
SET_ATTRIB(3, 0, clip_x0, clip_y1, z, 1.0f); /* upper left */
semantic_names[0] = TGSI_SEMANTIC_POSITION;
semantic_indexes[0] = 0;
}
/* colors */
if (emitColor) {
const GLfloat *c = ctx->Current.Attrib[VERT_ATTRIB_COLOR0];
SET_ATTRIB(0, 1, c[0], c[1], c[2], c[3]);
SET_ATTRIB(1, 1, c[0], c[1], c[2], c[3]);
SET_ATTRIB(2, 1, c[0], c[1], c[2], c[3]);
SET_ATTRIB(3, 1, c[0], c[1], c[2], c[3]);
semantic_names[1] = TGSI_SEMANTIC_COLOR;
semantic_indexes[1] = 0;
attr = 2;
}
else {
attr = 1;
}
/* texcoords */
for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
if (ctx->Texture.Unit[i]._ReallyEnabled & TEXTURE_2D_BIT) {
struct gl_texture_object *obj = ctx->Texture.Unit[i]._Current;
struct gl_texture_image *img = obj->Image[0][obj->BaseLevel];
const GLfloat wt = (GLfloat) img->Width;
const GLfloat ht = (GLfloat) img->Height;
const GLfloat s0 = obj->CropRect[0] / wt;
const GLfloat t0 = obj->CropRect[1] / ht;
const GLfloat s1 = (obj->CropRect[0] + obj->CropRect[2]) / wt;
const GLfloat t1 = (obj->CropRect[1] + obj->CropRect[3]) / ht;
/*printf("crop texcoords: %g, %g .. %g, %g\n", s0, t0, s1, t1);*/
SET_ATTRIB(0, attr, s0, t0, 0.0f, 1.0f); /* lower left */
SET_ATTRIB(1, attr, s1, t0, 0.0f, 1.0f); /* lower right */
SET_ATTRIB(2, attr, s1, t1, 0.0f, 1.0f); /* upper right */
SET_ATTRIB(3, attr, s0, t1, 0.0f, 1.0f); /* upper left */
semantic_names[attr] = TGSI_SEMANTIC_GENERIC;
semantic_indexes[attr] = 0;
attr++;
}
}
pipe_buffer_unmap(pipe, vbuffer_transfer);
#undef SET_ATTRIB
}
cso_save_viewport(cso);
cso_save_vertex_shader(cso);
cso_save_vertex_elements(cso);
cso_save_vertex_buffers(cso);
{
void *vs = lookup_shader(pipe, numAttribs,
semantic_names, semantic_indexes);
cso_set_vertex_shader_handle(cso, vs);
}
for (i = 0; i < numAttribs; i++) {
velements[i].src_offset = i * 4 * sizeof(float);
velements[i].instance_divisor = 0;
velements[i].vertex_buffer_index = 0;
velements[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
}
cso_set_vertex_elements(cso, numAttribs, velements);
/* viewport state: viewport matching window dims */
{
const struct gl_framebuffer *fb = st->ctx->DrawBuffer;
const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP);
const GLfloat width = (GLfloat)fb->Width;
const GLfloat height = (GLfloat)fb->Height;
struct pipe_viewport_state vp;
vp.scale[0] = 0.5f * width;
vp.scale[1] = height * (invert ? -0.5f : 0.5f);
vp.scale[2] = 1.0f;
vp.scale[3] = 1.0f;
vp.translate[0] = 0.5f * width;
vp.translate[1] = 0.5f * height;
vp.translate[2] = 0.0f;
vp.translate[3] = 0.0f;
cso_set_viewport(cso, &vp);
}
util_draw_vertex_buffer(pipe, cso, vbuffer,
0, /* offset */
PIPE_PRIM_TRIANGLE_FAN,
4, /* verts */
numAttribs); /* attribs/vert */
pipe_resource_reference(&vbuffer, NULL);
/* restore state */
cso_restore_viewport(cso);
cso_restore_vertex_shader(cso);
cso_restore_vertex_elements(cso);
cso_restore_vertex_buffers(cso);
}
/**
* Do glClear by drawing a quadrilateral.
* The vertices of the quad will be computed from the
* ctx->DrawBuffer->_X/Ymin/max fields.
*/
static void
clear_with_quad(struct gl_context *ctx, unsigned clear_buffers)
{
struct st_context *st = st_context(ctx);
const struct gl_framebuffer *fb = ctx->DrawBuffer;
const GLfloat fb_width = (GLfloat) fb->Width;
const GLfloat fb_height = (GLfloat) fb->Height;
const GLfloat x0 = (GLfloat) ctx->DrawBuffer->_Xmin / fb_width * 2.0f - 1.0f;
const GLfloat x1 = (GLfloat) ctx->DrawBuffer->_Xmax / fb_width * 2.0f - 1.0f;
const GLfloat y0 = (GLfloat) ctx->DrawBuffer->_Ymin / fb_height * 2.0f - 1.0f;
const GLfloat y1 = (GLfloat) ctx->DrawBuffer->_Ymax / fb_height * 2.0f - 1.0f;
unsigned num_layers =
util_framebuffer_get_num_layers(&st->state.framebuffer);
/*
printf("%s %s%s%s %f,%f %f,%f\n", __FUNCTION__,
color ? "color, " : "",
depth ? "depth, " : "",
stencil ? "stencil" : "",
x0, y0,
x1, y1);
*/
cso_save_blend(st->cso_context);
cso_save_stencil_ref(st->cso_context);
cso_save_depth_stencil_alpha(st->cso_context);
cso_save_rasterizer(st->cso_context);
cso_save_sample_mask(st->cso_context);
cso_save_viewport(st->cso_context);
cso_save_fragment_shader(st->cso_context);
cso_save_stream_outputs(st->cso_context);
cso_save_vertex_shader(st->cso_context);
cso_save_geometry_shader(st->cso_context);
cso_save_vertex_elements(st->cso_context);
cso_save_aux_vertex_buffer_slot(st->cso_context);
/* blend state: RGBA masking */
{
struct pipe_blend_state blend;
memset(&blend, 0, sizeof(blend));
if (clear_buffers & PIPE_CLEAR_COLOR) {
int num_buffers = ctx->Extensions.EXT_draw_buffers2 ?
ctx->DrawBuffer->_NumColorDrawBuffers : 1;
int i;
blend.independent_blend_enable = num_buffers > 1;
for (i = 0; i < num_buffers; i++) {
if (!(clear_buffers & (PIPE_CLEAR_COLOR0 << i)))
continue;
if (ctx->Color.ColorMask[i][0])
blend.rt[i].colormask |= PIPE_MASK_R;
if (ctx->Color.ColorMask[i][1])
blend.rt[i].colormask |= PIPE_MASK_G;
if (ctx->Color.ColorMask[i][2])
blend.rt[i].colormask |= PIPE_MASK_B;
if (ctx->Color.ColorMask[i][3])
blend.rt[i].colormask |= PIPE_MASK_A;
}
if (st->ctx->Color.DitherFlag)
blend.dither = 1;
}
cso_set_blend(st->cso_context, &blend);
}
/* depth_stencil state: always pass/set to ref value */
{
struct pipe_depth_stencil_alpha_state depth_stencil;
memset(&depth_stencil, 0, sizeof(depth_stencil));
if (clear_buffers & PIPE_CLEAR_DEPTH) {
depth_stencil.depth.enabled = 1;
depth_stencil.depth.writemask = 1;
depth_stencil.depth.func = PIPE_FUNC_ALWAYS;
}
if (clear_buffers & PIPE_CLEAR_STENCIL) {
struct pipe_stencil_ref stencil_ref;
memset(&stencil_ref, 0, sizeof(stencil_ref));
depth_stencil.stencil[0].enabled = 1;
depth_stencil.stencil[0].func = PIPE_FUNC_ALWAYS;
depth_stencil.stencil[0].fail_op = PIPE_STENCIL_OP_REPLACE;
depth_stencil.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE;
depth_stencil.stencil[0].zfail_op = PIPE_STENCIL_OP_REPLACE;
depth_stencil.stencil[0].valuemask = 0xff;
depth_stencil.stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff;
stencil_ref.ref_value[0] = ctx->Stencil.Clear;
cso_set_stencil_ref(st->cso_context, &stencil_ref);
}
cso_set_depth_stencil_alpha(st->cso_context, &depth_stencil);
}
cso_set_vertex_elements(st->cso_context, 2, st->velems_util_draw);
cso_set_stream_outputs(st->cso_context, 0, NULL, NULL);
cso_set_sample_mask(st->cso_context, ~0);
cso_set_rasterizer(st->cso_context, &st->clear.raster);
/* viewport state: viewport matching window dims */
{
const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP);
struct pipe_viewport_state vp;
vp.scale[0] = 0.5f * fb_width;
vp.scale[1] = fb_height * (invert ? -0.5f : 0.5f);
vp.scale[2] = 1.0f;
vp.scale[3] = 1.0f;
vp.translate[0] = 0.5f * fb_width;
vp.translate[1] = 0.5f * fb_height;
vp.translate[2] = 0.0f;
vp.translate[3] = 0.0f;
cso_set_viewport(st->cso_context, &vp);
}
set_fragment_shader(st);
cso_set_geometry_shader_handle(st->cso_context, NULL);
if (num_layers > 1)
set_vertex_shader_layered(st);
else
set_vertex_shader(st);
/* We can't translate the clear color to the colorbuffer format,
* because different colorbuffers may have different formats.
*/
/* draw quad matching scissor rect */
draw_quad(st, x0, y0, x1, y1, (GLfloat) ctx->Depth.Clear, num_layers,
(union pipe_color_union*)&ctx->Color.ClearColor);
/* Restore pipe state */
cso_restore_blend(st->cso_context);
cso_restore_stencil_ref(st->cso_context);
cso_restore_depth_stencil_alpha(st->cso_context);
cso_restore_rasterizer(st->cso_context);
cso_restore_sample_mask(st->cso_context);
cso_restore_viewport(st->cso_context);
cso_restore_fragment_shader(st->cso_context);
cso_restore_vertex_shader(st->cso_context);
cso_restore_geometry_shader(st->cso_context);
cso_restore_vertex_elements(st->cso_context);
cso_restore_aux_vertex_buffer_slot(st->cso_context);
cso_restore_stream_outputs(st->cso_context);
}
static void
st_BlitFramebuffer(struct gl_context *ctx,
GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter)
{
const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
GL_STENCIL_BUFFER_BIT);
struct st_context *st = st_context(ctx);
const uint pFilter = ((filter == GL_NEAREST)
? PIPE_TEX_MIPFILTER_NEAREST
: PIPE_TEX_MIPFILTER_LINEAR);
struct gl_framebuffer *readFB = ctx->ReadBuffer;
struct gl_framebuffer *drawFB = ctx->DrawBuffer;
st_validate_state(st);
if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
&dstX0, &dstY0, &dstX1, &dstY1)) {
return; /* nothing to draw/blit */
}
if (st_fb_orientation(drawFB) == Y_0_TOP) {
/* invert Y for dest */
dstY0 = drawFB->Height - dstY0;
dstY1 = drawFB->Height - dstY1;
}
if (st_fb_orientation(readFB) == Y_0_TOP) {
/* invert Y for src */
srcY0 = readFB->Height - srcY0;
srcY1 = readFB->Height - srcY1;
}
/* Disable conditional rendering. */
if (st->render_condition) {
st->pipe->render_condition(st->pipe, NULL, 0);
}
if (readFB->Visual.sampleBuffers > drawFB->Visual.sampleBuffers &&
readFB->Visual.samples > 1) {
struct pipe_resolve_info info;
if (dstX0 < dstX1) {
info.dst.x0 = dstX0;
info.dst.x1 = dstX1;
info.src.x0 = srcX0;
info.src.x1 = srcX1;
} else {
info.dst.x0 = dstX1;
info.dst.x1 = dstX0;
info.src.x0 = srcX1;
info.src.x1 = srcX0;
}
if (dstY0 < dstY1) {
info.dst.y0 = dstY0;
info.dst.y1 = dstY1;
info.src.y0 = srcY0;
info.src.y1 = srcY1;
} else {
info.dst.y0 = dstY1;
info.dst.y1 = dstY0;
info.src.y0 = srcY1;
info.src.y1 = srcY0;
}
st_BlitFramebuffer_resolve(ctx, mask, &info); /* filter doesn't apply */
goto done;
}
if (srcY0 > srcY1 && dstY0 > dstY1) {
/* Both src and dst are upside down. Swap Y to make it
* right-side up to increase odds of using a fast path.
* Recall that all Gallium raster coords have Y=0=top.
*/
GLint tmp;
tmp = srcY0;
srcY0 = srcY1;
srcY1 = tmp;
tmp = dstY0;
dstY0 = dstY1;
dstY1 = tmp;
}
if (mask & GL_COLOR_BUFFER_BIT) {
struct gl_renderbuffer_attachment *srcAtt =
&readFB->Attachment[readFB->_ColorReadBufferIndex];
if(srcAtt->Type == GL_TEXTURE) {
struct st_texture_object *srcObj =
st_texture_object(srcAtt->Texture);
struct st_renderbuffer *dstRb =
st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
struct pipe_surface *dstSurf = dstRb->surface;
if (!srcObj->pt)
goto done;
util_blit_pixels(st->blit, srcObj->pt, srcAtt->TextureLevel,
srcX0, srcY0, srcX1, srcY1,
srcAtt->Zoffset + srcAtt->CubeMapFace,
dstSurf, dstX0, dstY0, dstX1, dstY1,
0.0, pFilter, TGSI_WRITEMASK_XYZW, 0);
}
else {
struct st_renderbuffer *srcRb =
st_renderbuffer(readFB->_ColorReadBuffer);
struct st_renderbuffer *dstRb =
st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
struct pipe_surface *srcSurf = srcRb->surface;
struct pipe_surface *dstSurf = dstRb->surface;
util_blit_pixels(st->blit,
srcRb->texture, srcSurf->u.tex.level,
srcX0, srcY0, srcX1, srcY1,
srcSurf->u.tex.first_layer,
dstSurf, dstX0, dstY0, dstX1, dstY1,
0.0, pFilter, TGSI_WRITEMASK_XYZW, 0);
}
}
if (mask & depthStencil) {
/* depth and/or stencil blit */
/* get src/dst depth surfaces */
struct gl_renderbuffer_attachment *srcDepth =
&readFB->Attachment[BUFFER_DEPTH];
struct gl_renderbuffer_attachment *dstDepth =
&drawFB->Attachment[BUFFER_DEPTH];
struct gl_renderbuffer_attachment *srcStencil =
&readFB->Attachment[BUFFER_STENCIL];
struct gl_renderbuffer_attachment *dstStencil =
&drawFB->Attachment[BUFFER_STENCIL];
struct st_renderbuffer *srcDepthRb =
st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
struct st_renderbuffer *dstDepthRb =
st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
struct pipe_surface *dstDepthSurf =
dstDepthRb ? dstDepthRb->surface : NULL;
struct st_renderbuffer *srcStencilRb =
st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
struct st_renderbuffer *dstStencilRb =
st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
struct pipe_surface *dstStencilSurf =
dstStencilRb ? dstStencilRb->surface : NULL;
if ((mask & depthStencil) == depthStencil &&
st_is_depth_stencil_combined(srcDepth, srcStencil) &&
st_is_depth_stencil_combined(dstDepth, dstStencil)) {
/* Blitting depth and stencil values between combined
* depth/stencil buffers. This is the ideal case for such buffers.
*/
util_blit_pixels(st->blit,
srcDepthRb->texture,
srcDepthRb->surface->u.tex.level,
srcX0, srcY0, srcX1, srcY1,
srcDepthRb->surface->u.tex.first_layer,
dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
0.0, pFilter, 0,
BLIT_WRITEMASK_Z |
(st->has_stencil_export ? BLIT_WRITEMASK_STENCIL
: 0));
if (!st->has_stencil_export) {
_mesa_problem(ctx, "st_BlitFramebuffer(STENCIL) "
"software fallback not implemented");
}
}
else {
/* blitting depth and stencil separately */
if (mask & GL_DEPTH_BUFFER_BIT) {
util_blit_pixels(st->blit, srcDepthRb->texture,
srcDepthRb->surface->u.tex.level,
srcX0, srcY0, srcX1, srcY1,
srcDepthRb->surface->u.tex.first_layer,
dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
0.0, pFilter, 0, BLIT_WRITEMASK_Z);
}
if (mask & GL_STENCIL_BUFFER_BIT) {
if (st->has_stencil_export) {
util_blit_pixels(st->blit, srcStencilRb->texture,
srcStencilRb->surface->u.tex.level,
srcX0, srcY0, srcX1, srcY1,
srcStencilRb->surface->u.tex.first_layer,
dstStencilSurf, dstX0, dstY0, dstX1, dstY1,
0.0, pFilter, 0, BLIT_WRITEMASK_STENCIL);
}
else {
_mesa_problem(ctx, "st_BlitFramebuffer(STENCIL) "
"software fallback not implemented");
}
}
}
}
done:
/* Restore conditional rendering state. */
if (st->render_condition) {
st->pipe->render_condition(st->pipe, st->render_condition,
st->condition_mode);
}
}
static void
st_BlitFramebuffer(struct gl_context *ctx,
struct gl_framebuffer *readFB,
struct gl_framebuffer *drawFB,
GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter)
{
const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
GL_STENCIL_BUFFER_BIT);
struct st_context *st = st_context(ctx);
const uint pFilter = ((filter == GL_NEAREST)
? PIPE_TEX_FILTER_NEAREST
: PIPE_TEX_FILTER_LINEAR);
struct {
GLint srcX0, srcY0, srcX1, srcY1;
GLint dstX0, dstY0, dstX1, dstY1;
} clip;
struct pipe_blit_info blit;
st_manager_validate_framebuffers(st);
/* Make sure bitmap rendering has landed in the framebuffers */
st_flush_bitmap_cache(st);
st_invalidate_readpix_cache(st);
clip.srcX0 = srcX0;
clip.srcY0 = srcY0;
clip.srcX1 = srcX1;
clip.srcY1 = srcY1;
clip.dstX0 = dstX0;
clip.dstY0 = dstY0;
clip.dstX1 = dstX1;
clip.dstY1 = dstY1;
/* NOTE: If the src and dst dimensions don't match, we cannot simply adjust
* the integer coordinates to account for clipping (or scissors) because that
* would make us cut off fractional parts, affecting the result of the blit.
*
* XXX: This should depend on mask !
*/
if (!_mesa_clip_blit(ctx, readFB, drawFB,
&clip.srcX0, &clip.srcY0, &clip.srcX1, &clip.srcY1,
&clip.dstX0, &clip.dstY0, &clip.dstX1, &clip.dstY1)) {
return; /* nothing to draw/blit */
}
memset(&blit, 0, sizeof(struct pipe_blit_info));
blit.scissor_enable =
(dstX0 != clip.dstX0) ||
(dstY0 != clip.dstY0) ||
(dstX1 != clip.dstX1) ||
(dstY1 != clip.dstY1);
if (st_fb_orientation(drawFB) == Y_0_TOP) {
/* invert Y for dest */
dstY0 = drawFB->Height - dstY0;
dstY1 = drawFB->Height - dstY1;
/* invert Y for clip */
clip.dstY0 = drawFB->Height - clip.dstY0;
clip.dstY1 = drawFB->Height - clip.dstY1;
}
if (blit.scissor_enable) {
blit.scissor.minx = MIN2(clip.dstX0, clip.dstX1);
blit.scissor.miny = MIN2(clip.dstY0, clip.dstY1);
blit.scissor.maxx = MAX2(clip.dstX0, clip.dstX1);
blit.scissor.maxy = MAX2(clip.dstY0, clip.dstY1);
#if 0
debug_printf("scissor = (%i,%i)-(%i,%i)\n",
blit.scissor.minx,blit.scissor.miny,
blit.scissor.maxx,blit.scissor.maxy);
#endif
}
if (st_fb_orientation(readFB) == Y_0_TOP) {
/* invert Y for src */
srcY0 = readFB->Height - srcY0;
srcY1 = readFB->Height - srcY1;
}
if (srcY0 > srcY1 && dstY0 > dstY1) {
/* Both src and dst are upside down. Swap Y to make it
* right-side up to increase odds of using a fast path.
* Recall that all Gallium raster coords have Y=0=top.
*/
GLint tmp;
tmp = srcY0;
srcY0 = srcY1;
srcY1 = tmp;
tmp = dstY0;
dstY0 = dstY1;
dstY1 = tmp;
}
blit.src.box.depth = 1;
blit.dst.box.depth = 1;
/* Destination dimensions have to be positive: */
if (dstX0 < dstX1) {
blit.dst.box.x = dstX0;
blit.src.box.x = srcX0;
blit.dst.box.width = dstX1 - dstX0;
blit.src.box.width = srcX1 - srcX0;
} else {
blit.dst.box.x = dstX1;
blit.src.box.x = srcX1;
blit.dst.box.width = dstX0 - dstX1;
blit.src.box.width = srcX0 - srcX1;
}
if (dstY0 < dstY1) {
blit.dst.box.y = dstY0;
blit.src.box.y = srcY0;
blit.dst.box.height = dstY1 - dstY0;
blit.src.box.height = srcY1 - srcY0;
} else {
blit.dst.box.y = dstY1;
blit.src.box.y = srcY1;
blit.dst.box.height = dstY0 - dstY1;
blit.src.box.height = srcY0 - srcY1;
}
if (drawFB != ctx->WinSysDrawBuffer)
st_window_rectangles_to_blit(ctx, &blit);
blit.filter = pFilter;
blit.render_condition_enable = TRUE;
blit.alpha_blend = FALSE;
if (mask & GL_COLOR_BUFFER_BIT) {
struct gl_renderbuffer_attachment *srcAtt =
&readFB->Attachment[readFB->_ColorReadBufferIndex];
blit.mask = PIPE_MASK_RGBA;
if (srcAtt->Type == GL_TEXTURE) {
struct st_texture_object *srcObj = st_texture_object(srcAtt->Texture);
GLuint i;
if (!srcObj || !srcObj->pt) {
return;
}
for (i = 0; i < drawFB->_NumColorDrawBuffers; i++) {
struct st_renderbuffer *dstRb =
st_renderbuffer(drawFB->_ColorDrawBuffers[i]);
if (dstRb) {
struct pipe_surface *dstSurf = dstRb->surface;
if (dstSurf) {
blit.dst.resource = dstSurf->texture;
blit.dst.level = dstSurf->u.tex.level;
blit.dst.box.z = dstSurf->u.tex.first_layer;
blit.dst.format = dstSurf->format;
blit.src.resource = srcObj->pt;
blit.src.level = srcAtt->TextureLevel;
blit.src.box.z = srcAtt->Zoffset + srcAtt->CubeMapFace;
blit.src.format = srcObj->pt->format;
st_adjust_blit_for_srgb(&blit, ctx->Color.sRGBEnabled);
st->pipe->blit(st->pipe, &blit);
dstRb->defined = true; /* front buffer tracking */
}
}
}
}
else {
struct st_renderbuffer *srcRb =
st_renderbuffer(readFB->_ColorReadBuffer);
struct pipe_surface *srcSurf;
GLuint i;
if (!srcRb || !srcRb->surface) {
return;
}
srcSurf = srcRb->surface;
for (i = 0; i < drawFB->_NumColorDrawBuffers; i++) {
struct st_renderbuffer *dstRb =
st_renderbuffer(drawFB->_ColorDrawBuffers[i]);
if (dstRb) {
struct pipe_surface *dstSurf = dstRb->surface;
if (dstSurf) {
blit.dst.resource = dstSurf->texture;
blit.dst.level = dstSurf->u.tex.level;
blit.dst.box.z = dstSurf->u.tex.first_layer;
blit.dst.format = dstSurf->format;
blit.src.resource = srcSurf->texture;
blit.src.level = srcSurf->u.tex.level;
blit.src.box.z = srcSurf->u.tex.first_layer;
blit.src.format = srcSurf->format;
st_adjust_blit_for_srgb(&blit, ctx->Color.sRGBEnabled);
st->pipe->blit(st->pipe, &blit);
dstRb->defined = true; /* front buffer tracking */
}
}
}
}
}
if (mask & depthStencil) {
/* depth and/or stencil blit */
/* get src/dst depth surfaces */
struct st_renderbuffer *srcDepthRb =
st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
struct st_renderbuffer *dstDepthRb =
st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
struct pipe_surface *dstDepthSurf =
dstDepthRb ? dstDepthRb->surface : NULL;
struct st_renderbuffer *srcStencilRb =
st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
struct st_renderbuffer *dstStencilRb =
st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
struct pipe_surface *dstStencilSurf =
dstStencilRb ? dstStencilRb->surface : NULL;
if (_mesa_has_depthstencil_combined(readFB) &&
_mesa_has_depthstencil_combined(drawFB)) {
blit.mask = 0;
if (mask & GL_DEPTH_BUFFER_BIT)
blit.mask |= PIPE_MASK_Z;
if (mask & GL_STENCIL_BUFFER_BIT)
blit.mask |= PIPE_MASK_S;
blit.dst.resource = dstDepthSurf->texture;
blit.dst.level = dstDepthSurf->u.tex.level;
blit.dst.box.z = dstDepthSurf->u.tex.first_layer;
blit.dst.format = dstDepthSurf->format;
blit.src.resource = srcDepthRb->texture;
blit.src.level = srcDepthRb->surface->u.tex.level;
blit.src.box.z = srcDepthRb->surface->u.tex.first_layer;
blit.src.format = srcDepthRb->surface->format;
st->pipe->blit(st->pipe, &blit);
}
else {
/* blitting depth and stencil separately */
if (mask & GL_DEPTH_BUFFER_BIT) {
blit.mask = PIPE_MASK_Z;
blit.dst.resource = dstDepthSurf->texture;
blit.dst.level = dstDepthSurf->u.tex.level;
blit.dst.box.z = dstDepthSurf->u.tex.first_layer;
blit.dst.format = dstDepthSurf->format;
blit.src.resource = srcDepthRb->texture;
blit.src.level = srcDepthRb->surface->u.tex.level;
blit.src.box.z = srcDepthRb->surface->u.tex.first_layer;
blit.src.format = srcDepthRb->surface->format;
st->pipe->blit(st->pipe, &blit);
}
if (mask & GL_STENCIL_BUFFER_BIT) {
blit.mask = PIPE_MASK_S;
blit.dst.resource = dstStencilSurf->texture;
blit.dst.level = dstStencilSurf->u.tex.level;
blit.dst.box.z = dstStencilSurf->u.tex.first_layer;
blit.dst.format = dstStencilSurf->format;
blit.src.resource = srcStencilRb->texture;
blit.src.level = srcStencilRb->surface->u.tex.level;
blit.src.box.z = srcStencilRb->surface->u.tex.first_layer;
blit.src.format = srcStencilRb->surface->format;
st->pipe->blit(st->pipe, &blit);
}
}
}
}
/**
* Do a CopyTexSubImage operation using a read transfer from the source,
* a write transfer to the destination and get_tile()/put_tile() to access
* the pixels/texels.
*
* Note: srcY=0=TOP of renderbuffer
*/
static void
fallback_copy_texsubimage(struct gl_context *ctx,
struct st_renderbuffer *strb,
struct st_texture_image *stImage,
GLenum baseFormat,
GLint destX, GLint destY, GLint destZ,
GLint srcX, GLint srcY,
GLsizei width, GLsizei height)
{
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct pipe_transfer *src_trans;
GLvoid *texDest;
enum pipe_transfer_usage transfer_usage;
void *map;
if (ST_DEBUG & DEBUG_FALLBACK)
debug_printf("%s: fallback processing\n", __FUNCTION__);
if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
srcY = strb->Base.Height - srcY - height;
}
map = pipe_transfer_map(pipe,
strb->texture,
strb->rtt_level,
strb->rtt_face + strb->rtt_slice,
PIPE_TRANSFER_READ,
srcX, srcY,
width, height, &src_trans);
if ((baseFormat == GL_DEPTH_COMPONENT ||
baseFormat == GL_DEPTH_STENCIL) &&
util_format_is_depth_and_stencil(stImage->pt->format))
transfer_usage = PIPE_TRANSFER_READ_WRITE;
else
transfer_usage = PIPE_TRANSFER_WRITE;
/* XXX this used to ignore destZ param */
texDest = st_texture_image_map(st, stImage, destZ, transfer_usage,
destX, destY, width, height);
if (baseFormat == GL_DEPTH_COMPONENT ||
baseFormat == GL_DEPTH_STENCIL) {
const GLboolean scaleOrBias = (ctx->Pixel.DepthScale != 1.0F ||
ctx->Pixel.DepthBias != 0.0F);
GLint row, yStep;
uint *data;
/* determine bottom-to-top vs. top-to-bottom order for src buffer */
if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
srcY = height - 1;
yStep = -1;
}
else {
srcY = 0;
yStep = 1;
}
data = malloc(width * sizeof(uint));
if (data) {
/* To avoid a large temp memory allocation, do copy row by row */
for (row = 0; row < height; row++, srcY += yStep) {
pipe_get_tile_z(src_trans, map, 0, srcY, width, 1, data);
if (scaleOrBias) {
_mesa_scale_and_bias_depth_uint(ctx, width, data);
}
pipe_put_tile_z(stImage->transfer, texDest, 0, row, width, 1,
data);
}
}
else {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage()");
}
free(data);
}
else {
/* RGBA format */
GLfloat *tempSrc =
malloc(width * height * 4 * sizeof(GLfloat));
if (tempSrc && texDest) {
const GLint dims = 2;
const GLint dstRowStride = stImage->transfer->stride;
struct gl_texture_image *texImage = &stImage->base;
struct gl_pixelstore_attrib unpack = ctx->DefaultPacking;
if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
unpack.Invert = GL_TRUE;
}
/* get float/RGBA image from framebuffer */
/* XXX this usually involves a lot of int/float conversion.
* try to avoid that someday.
*/
pipe_get_tile_rgba_format(src_trans, map, 0, 0, width, height,
util_format_linear(strb->texture->format),
tempSrc);
/* Store into texture memory.
* Note that this does some special things such as pixel transfer
* ops and format conversion. In particular, if the dest tex format
* is actually RGBA but the user created the texture as GL_RGB we
* need to fill-in/override the alpha channel with 1.0.
*/
_mesa_texstore(ctx, dims,
texImage->_BaseFormat,
texImage->TexFormat,
dstRowStride,
(GLubyte **) &texDest,
width, height, 1,
GL_RGBA, GL_FLOAT, tempSrc, /* src */
&unpack);
}
else {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexSubImage");
}
free(tempSrc);
}
st_texture_image_unmap(st, stImage);
pipe->transfer_unmap(pipe, src_trans);
}
/**
* This uses a blit to copy the read buffer to a texture format which matches
* the format and type combo and then a fast read-back is done using memcpy.
* We can do arbitrary X/Y/Z/W/0/1 swizzling here as long as there is
* a format which matches the swizzling.
*
* If such a format isn't available, we fall back to _mesa_readpixels.
*
* NOTE: Some drivers use a blit to convert between tiled and linear
* texture layouts during texture uploads/downloads, so the blit
* we do here should be free in such cases.
*/
static void
st_readpixels(struct gl_context *ctx, GLint x, GLint y,
GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *pack,
GLvoid *pixels)
{
struct st_context *st = st_context(ctx);
struct gl_renderbuffer *rb =
_mesa_get_read_renderbuffer_for_format(ctx, format);
struct st_renderbuffer *strb = st_renderbuffer(rb);
struct pipe_context *pipe = st->pipe;
struct pipe_screen *screen = pipe->screen;
struct pipe_resource *src;
struct pipe_resource *dst = NULL;
struct pipe_resource dst_templ;
enum pipe_format dst_format, src_format;
struct pipe_blit_info blit;
unsigned bind = PIPE_BIND_TRANSFER_READ;
struct pipe_transfer *tex_xfer;
ubyte *map = NULL;
/* Validate state (to be sure we have up-to-date framebuffer surfaces)
* and flush the bitmap cache prior to reading. */
st_validate_state(st);
st_flush_bitmap_cache(st);
if (!st->prefer_blit_based_texture_transfer) {
goto fallback;
}
/* This must be done after state validation. */
src = strb->texture;
/* XXX Fallback for depth-stencil formats due to an incomplete
* stencil blit implementation in some drivers. */
if (format == GL_DEPTH_STENCIL) {
goto fallback;
}
/* We are creating a texture of the size of the region being read back.
* Need to check for NPOT texture support. */
if (!screen->get_param(screen, PIPE_CAP_NPOT_TEXTURES) &&
(!util_is_power_of_two(width) ||
!util_is_power_of_two(height))) {
goto fallback;
}
/* If the base internal format and the texture format don't match, we have
* to use the slow path. */
if (rb->_BaseFormat !=
_mesa_get_format_base_format(rb->Format)) {
goto fallback;
}
/* See if the texture format already matches the format and type,
* in which case the memcpy-based fast path will likely be used and
* we don't have to blit. */
if (_mesa_format_matches_format_and_type(rb->Format, format,
type, pack->SwapBytes)) {
goto fallback;
}
if (_mesa_readpixels_needs_slow_path(ctx, format, type, GL_TRUE)) {
goto fallback;
}
/* Convert the source format to what is expected by ReadPixels
* and see if it's supported. */
src_format = util_format_linear(src->format);
src_format = util_format_luminance_to_red(src_format);
src_format = util_format_intensity_to_red(src_format);
if (!src_format ||
!screen->is_format_supported(screen, src_format, src->target,
src->nr_samples,
PIPE_BIND_SAMPLER_VIEW)) {
goto fallback;
}
if (format == GL_DEPTH_COMPONENT || format == GL_DEPTH_STENCIL)
bind |= PIPE_BIND_DEPTH_STENCIL;
else
bind |= PIPE_BIND_RENDER_TARGET;
/* Choose the destination format by finding the best match
* for the format+type combo. */
dst_format = st_choose_matching_format(screen, bind, format, type,
pack->SwapBytes);
if (dst_format == PIPE_FORMAT_NONE) {
goto fallback;
}
/* create the destination texture */
memset(&dst_templ, 0, sizeof(dst_templ));
dst_templ.target = PIPE_TEXTURE_2D;
dst_templ.format = dst_format;
dst_templ.bind = bind;
dst_templ.usage = PIPE_USAGE_STAGING;
st_gl_texture_dims_to_pipe_dims(GL_TEXTURE_2D, width, height, 1,
&dst_templ.width0, &dst_templ.height0,
&dst_templ.depth0, &dst_templ.array_size);
dst = screen->resource_create(screen, &dst_templ);
if (!dst) {
goto fallback;
}
memset(&blit, 0, sizeof(blit));
blit.src.resource = src;
blit.src.level = strb->surface->u.tex.level;
blit.src.format = src_format;
blit.dst.resource = dst;
blit.dst.level = 0;
blit.dst.format = dst->format;
blit.src.box.x = x;
blit.dst.box.x = 0;
blit.src.box.y = y;
blit.dst.box.y = 0;
blit.src.box.z = strb->surface->u.tex.first_layer;
blit.dst.box.z = 0;
blit.src.box.width = blit.dst.box.width = width;
blit.src.box.height = blit.dst.box.height = height;
blit.src.box.depth = blit.dst.box.depth = 1;
blit.mask = st_get_blit_mask(rb->_BaseFormat, format);
blit.filter = PIPE_TEX_FILTER_NEAREST;
blit.scissor_enable = FALSE;
if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
blit.src.box.y = rb->Height - blit.src.box.y;
blit.src.box.height = -blit.src.box.height;
}
/* blit */
st->pipe->blit(st->pipe, &blit);
/* map resources */
pixels = _mesa_map_pbo_dest(ctx, pack, pixels);
map = pipe_transfer_map_3d(pipe, dst, 0, PIPE_TRANSFER_READ,
0, 0, 0, width, height, 1, &tex_xfer);
if (!map) {
_mesa_unmap_pbo_dest(ctx, pack);
pipe_resource_reference(&dst, NULL);
goto fallback;
}
/* memcpy data into a user buffer */
{
const uint bytesPerRow = width * util_format_get_blocksize(dst_format);
GLuint row;
for (row = 0; row < (unsigned) height; row++) {
GLvoid *dest = _mesa_image_address3d(pack, pixels,
width, height, format,
type, 0, row, 0);
memcpy(dest, map, bytesPerRow);
map += tex_xfer->stride;
}
}
pipe_transfer_unmap(pipe, tex_xfer);
_mesa_unmap_pbo_dest(ctx, pack);
pipe_resource_reference(&dst, NULL);
return;
fallback:
_mesa_readpixels(ctx, x, y, width, height, format, type, pack, pixels);
}
/**
* Do glClear by drawing a quadrilateral.
* The vertices of the quad will be computed from the
* ctx->DrawBuffer->_X/Ymin/max fields.
*/
static void
clear_with_quad(struct gl_context *ctx, unsigned clear_buffers)
{
struct st_context *st = st_context(ctx);
struct cso_context *cso = st->cso_context;
const struct gl_framebuffer *fb = ctx->DrawBuffer;
const GLfloat fb_width = (GLfloat) fb->Width;
const GLfloat fb_height = (GLfloat) fb->Height;
const GLfloat x0 = (GLfloat) ctx->DrawBuffer->_Xmin / fb_width * 2.0f - 1.0f;
const GLfloat x1 = (GLfloat) ctx->DrawBuffer->_Xmax / fb_width * 2.0f - 1.0f;
const GLfloat y0 = (GLfloat) ctx->DrawBuffer->_Ymin / fb_height * 2.0f - 1.0f;
const GLfloat y1 = (GLfloat) ctx->DrawBuffer->_Ymax / fb_height * 2.0f - 1.0f;
unsigned num_layers =
util_framebuffer_get_num_layers(&st->state.framebuffer);
/*
printf("%s %s%s%s %f,%f %f,%f\n", __func__,
color ? "color, " : "",
depth ? "depth, " : "",
stencil ? "stencil" : "",
x0, y0,
x1, y1);
*/
cso_save_state(cso, (CSO_BIT_BLEND |
CSO_BIT_STENCIL_REF |
CSO_BIT_DEPTH_STENCIL_ALPHA |
CSO_BIT_RASTERIZER |
CSO_BIT_SAMPLE_MASK |
CSO_BIT_MIN_SAMPLES |
CSO_BIT_VIEWPORT |
CSO_BIT_STREAM_OUTPUTS |
CSO_BIT_VERTEX_ELEMENTS |
CSO_BIT_AUX_VERTEX_BUFFER_SLOT |
CSO_BIT_PAUSE_QUERIES |
CSO_BITS_ALL_SHADERS));
/* blend state: RGBA masking */
{
struct pipe_blend_state blend;
memset(&blend, 0, sizeof(blend));
if (clear_buffers & PIPE_CLEAR_COLOR) {
int num_buffers = ctx->Extensions.EXT_draw_buffers2 ?
ctx->DrawBuffer->_NumColorDrawBuffers : 1;
int i;
blend.independent_blend_enable = num_buffers > 1;
for (i = 0; i < num_buffers; i++) {
if (!(clear_buffers & (PIPE_CLEAR_COLOR0 << i)))
continue;
if (ctx->Color.ColorMask[i][0])
blend.rt[i].colormask |= PIPE_MASK_R;
if (ctx->Color.ColorMask[i][1])
blend.rt[i].colormask |= PIPE_MASK_G;
if (ctx->Color.ColorMask[i][2])
blend.rt[i].colormask |= PIPE_MASK_B;
if (ctx->Color.ColorMask[i][3])
blend.rt[i].colormask |= PIPE_MASK_A;
}
if (ctx->Color.DitherFlag)
blend.dither = 1;
}
cso_set_blend(cso, &blend);
}
/* depth_stencil state: always pass/set to ref value */
{
struct pipe_depth_stencil_alpha_state depth_stencil;
memset(&depth_stencil, 0, sizeof(depth_stencil));
if (clear_buffers & PIPE_CLEAR_DEPTH) {
depth_stencil.depth.enabled = 1;
depth_stencil.depth.writemask = 1;
depth_stencil.depth.func = PIPE_FUNC_ALWAYS;
}
if (clear_buffers & PIPE_CLEAR_STENCIL) {
struct pipe_stencil_ref stencil_ref;
memset(&stencil_ref, 0, sizeof(stencil_ref));
depth_stencil.stencil[0].enabled = 1;
depth_stencil.stencil[0].func = PIPE_FUNC_ALWAYS;
depth_stencil.stencil[0].fail_op = PIPE_STENCIL_OP_REPLACE;
depth_stencil.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE;
depth_stencil.stencil[0].zfail_op = PIPE_STENCIL_OP_REPLACE;
depth_stencil.stencil[0].valuemask = 0xff;
depth_stencil.stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff;
stencil_ref.ref_value[0] = ctx->Stencil.Clear;
cso_set_stencil_ref(cso, &stencil_ref);
}
cso_set_depth_stencil_alpha(cso, &depth_stencil);
}
cso_set_vertex_elements(cso, 2, st->util_velems);
cso_set_stream_outputs(cso, 0, NULL, NULL);
cso_set_sample_mask(cso, ~0);
cso_set_min_samples(cso, 1);
cso_set_rasterizer(cso, &st->clear.raster);
/* viewport state: viewport matching window dims */
cso_set_viewport_dims(st->cso_context, fb_width, fb_height,
st_fb_orientation(fb) == Y_0_TOP);
set_fragment_shader(st);
cso_set_tessctrl_shader_handle(cso, NULL);
cso_set_tesseval_shader_handle(cso, NULL);
if (num_layers > 1)
set_vertex_shader_layered(st);
else
set_vertex_shader(st);
/* draw quad matching scissor rect.
*
* Note: if we're only clearing depth/stencil we still setup vertices
* with color, but they'll be ignored.
*
* We can't translate the clear color to the colorbuffer format,
* because different colorbuffers may have different formats.
*/
if (!st_draw_quad(st, x0, y0, x1, y1,
ctx->Depth.Clear * 2.0f - 1.0f,
0.0f, 0.0f, 0.0f, 0.0f,
(const float *) &ctx->Color.ClearColor.f,
num_layers)) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glClear");
}
/* Restore pipe state */
cso_restore_state(cso);
}