/**
* Determine if we need to clear the stencil buffer by drawing a quad.
*/
static INLINE GLboolean
check_clear_stencil_with_quad(struct gl_context *ctx, struct gl_renderbuffer *rb,
boolean ds_separate)
{
const struct st_renderbuffer *strb = st_renderbuffer(rb);
const GLboolean isDS = util_format_is_depth_and_stencil(strb->surface->format);
const GLuint stencilMax = 0xff;
const GLboolean maskStencil
= (ctx->Stencil.WriteMask[0] & stencilMax) != stencilMax;
assert(_mesa_get_format_bits(rb->Format, GL_STENCIL_BITS) > 0);
if (maskStencil)
return GL_TRUE;
if (ctx->Scissor.Enabled &&
(ctx->Scissor.X != 0 ||
ctx->Scissor.Y != 0 ||
ctx->Scissor.Width < rb->Width ||
ctx->Scissor.Height < rb->Height))
return GL_TRUE;
/* This is correct, but it is necessary to look at the depth clear
* value held in the surface when it comes time to issue the clear,
* rather than taking depth and stencil clear values from the
* current state.
*/
if (!ds_separate && isDS && ctx->DrawBuffer->Visual.depthBits > 0)
return GL_TRUE;
return GL_FALSE;
}
static void
st_egl_image_target_renderbuffer_storage(struct gl_context *ctx,
struct gl_renderbuffer *rb,
GLeglImageOES image_handle)
{
struct st_context *st = st_context(ctx);
struct st_renderbuffer *strb = st_renderbuffer(rb);
struct pipe_surface *ps;
unsigned usage;
usage = PIPE_BIND_RENDER_TARGET;
ps = st_manager_get_egl_image_surface(st, (void *) image_handle, usage);
if (ps) {
strb->Base.Width = ps->width;
strb->Base.Height = ps->height;
strb->Base.Format = st_pipe_format_to_mesa_format(ps->format);
strb->Base.DataType = st_format_datatype(ps->format);
strb->Base._BaseFormat = st_pipe_format_to_base_format(ps->format);
strb->Base.InternalFormat = strb->Base._BaseFormat;
pipe_surface_reference(&strb->surface, ps);
pipe_resource_reference(&strb->texture, ps->texture);
pipe_surface_reference(&ps, NULL);
}
}
/** Undo surface-to-texture binding */
int
st_release_teximage(struct st_framebuffer *stfb, uint surfIndex,
int target, int format, int level)
{
GET_CURRENT_CONTEXT(ctx);
struct st_context *st = ctx->st;
struct st_renderbuffer *strb;
assert(surfIndex <= ST_SURFACE_DEPTH);
strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer);
if (!strb->texture_save || !strb->surface_save) {
/* Error! */
return 0;
}
st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
/* free tex surface, restore original */
pipe_surface_reference(&strb->surface, strb->surface_save);
pipe_texture_reference(&strb->texture, strb->texture_save);
pipe_surface_reference(&strb->surface_save, NULL);
pipe_texture_reference(&strb->texture_save, NULL);
st->dirty.st |= ST_NEW_FRAMEBUFFER;
return 1;
}
/**
* Determine if we need to clear the stencil buffer by drawing a quad.
*/
static INLINE GLboolean
check_clear_stencil_with_quad(GLcontext *ctx, struct gl_renderbuffer *rb)
{
const struct st_renderbuffer *strb = st_renderbuffer(rb);
const GLboolean isDS = pf_is_depth_and_stencil(strb->surface->format);
const GLuint stencilMax = (1 << rb->StencilBits) - 1;
const GLboolean maskStencil
= (ctx->Stencil.WriteMask[0] & stencilMax) != stencilMax;
if (maskStencil)
return TRUE;
if (ctx->Scissor.Enabled)
return TRUE;
/* This is correct, but it is necessary to look at the depth clear
* value held in the surface when it comes time to issue the clear,
* rather than taking depth and stencil clear values from the
* current state.
*/
if (isDS &&
ctx->DrawBuffer->Visual.depthBits > 0)
return TRUE;
return FALSE;
}
static void
st_Accum(GLcontext *ctx, GLenum op, GLfloat value)
{
struct st_context *st = ctx->st;
struct st_renderbuffer *acc_strb
= st_renderbuffer(ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer);
struct st_renderbuffer *color_strb
= st_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
const GLint xpos = ctx->DrawBuffer->_Xmin;
const GLint ypos = ctx->DrawBuffer->_Ymin;
const GLint width = ctx->DrawBuffer->_Xmax - xpos;
const GLint height = ctx->DrawBuffer->_Ymax - ypos;
if(!acc_strb->data)
return;
/* make sure color bufs aren't cached */
st_flush( st, PIPE_FLUSH_RENDER_CACHE, NULL );
switch (op) {
case GL_ADD:
if (value != 0.0F) {
accum_mad(ctx, 1.0, value, xpos, ypos, width, height, acc_strb);
}
break;
case GL_MULT:
if (value != 1.0F) {
accum_mad(ctx, value, 0.0, xpos, ypos, width, height, acc_strb);
}
break;
case GL_ACCUM:
if (value != 0.0F) {
accum_accum(st, value, xpos, ypos, width, height, acc_strb, color_strb);
}
break;
case GL_LOAD:
accum_load(st, value, xpos, ypos, width, height, acc_strb, color_strb);
break;
case GL_RETURN:
accum_return(ctx, value, xpos, ypos, width, height, acc_strb, color_strb);
break;
default:
assert(0);
}
}
/** Check if we have a front color buffer and if it's been drawn to. */
static INLINE GLboolean
is_front_buffer_dirty(struct st_context *st)
{
struct gl_framebuffer *fb = st->ctx->DrawBuffer;
struct st_renderbuffer *strb
= st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
return strb && strb->defined;
}
/**
* gl_renderbuffer::AllocStorage()
* This is called to allocate the original drawing surface, and
* during window resize.
*/
static GLboolean
st_renderbuffer_alloc_storage(struct gl_context * ctx,
struct gl_renderbuffer *rb,
GLenum internalFormat,
GLuint width, GLuint height)
{
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct pipe_screen *screen = st->pipe->screen;
struct st_renderbuffer *strb = st_renderbuffer(rb);
enum pipe_format format;
struct pipe_surface surf_tmpl;
format = st_choose_renderbuffer_format(screen, internalFormat,
rb->NumSamples);
if (format == PIPE_FORMAT_NONE) {
return FALSE;
}
/* init renderbuffer fields */
strb->Base.Width = width;
strb->Base.Height = height;
strb->Base.Format = st_pipe_format_to_mesa_format(format);
strb->Base._BaseFormat = _mesa_base_fbo_format(ctx, internalFormat);
strb->Base.DataType = st_format_datatype(format);
strb->format = format;
strb->defined = GL_FALSE; /* undefined contents now */
if (strb->software) {
size_t size;
free(strb->data);
assert(strb->format != PIPE_FORMAT_NONE);
strb->stride = util_format_get_stride(strb->format, width);
size = util_format_get_2d_size(strb->format, strb->stride, height);
strb->data = malloc(size);
return strb->data != NULL;
}
else {
struct pipe_resource template;
/* Free the old surface and texture
*/
pipe_surface_reference( &strb->surface, NULL );
pipe_resource_reference( &strb->texture, NULL );
pipe_sampler_view_reference(&strb->sampler_view, NULL);
/* Setup new texture template.
*/
memset(&template, 0, sizeof(template));
/**
* gl_renderbuffer::Delete()
*/
static void
st_renderbuffer_delete(struct gl_renderbuffer *rb)
{
struct st_renderbuffer *strb = st_renderbuffer(rb);
ASSERT(strb);
pipe_surface_reference(&strb->surface, NULL);
pipe_resource_reference(&strb->texture, NULL);
free(strb->data);
_mesa_delete_renderbuffer(rb);
}
/**
* gl_renderbuffer::Delete()
*/
static void
st_renderbuffer_delete(struct gl_context *ctx, struct gl_renderbuffer *rb)
{
struct st_renderbuffer *strb = st_renderbuffer(rb);
if (ctx) {
struct st_context *st = st_context(ctx);
pipe_surface_release(st->pipe, &strb->surface);
}
pipe_resource_reference(&strb->texture, NULL);
free(strb->data);
_mesa_delete_renderbuffer(ctx, rb);
}
/** Redirect rendering into stfb's surface to a texture image */
int
st_bind_teximage(struct st_framebuffer *stfb, uint surfIndex,
int target, int format, int level)
{
GET_CURRENT_CONTEXT(ctx);
struct st_context *st = ctx->st;
struct pipe_context *pipe = st->pipe;
struct pipe_screen *screen = pipe->screen;
const GLuint unit = ctx->Texture.CurrentUnit;
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
struct st_texture_image *stImage;
struct st_renderbuffer *strb;
GLint face = 0, slice = 0;
assert(surfIndex <= ST_SURFACE_DEPTH);
strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer);
if (strb->texture_save || strb->surface_save) {
/* Error! */
return 0;
}
if (target == ST_TEXTURE_2D) {
texObj = texUnit->CurrentTex[TEXTURE_2D_INDEX];
texImage = _mesa_get_tex_image(ctx, texObj, GL_TEXTURE_2D, level);
stImage = st_texture_image(texImage);
}
else {
/* unsupported target */
return 0;
}
st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
/* save the renderbuffer's surface/texture info */
pipe_texture_reference(&strb->texture_save, strb->texture);
pipe_surface_reference(&strb->surface_save, strb->surface);
/* plug in new surface/texture info */
pipe_texture_reference(&strb->texture, stImage->pt);
strb->surface = screen->get_tex_surface(screen, strb->texture,
face, level, slice,
(PIPE_BUFFER_USAGE_GPU_READ |
PIPE_BUFFER_USAGE_GPU_WRITE));
st->dirty.st |= ST_NEW_FRAMEBUFFER;
return 1;
}
/**
* Tell the screen to display the front color buffer on-screen.
*/
static void
display_front_buffer(struct st_context *st)
{
struct gl_framebuffer *fb = st->ctx->DrawBuffer;
struct st_renderbuffer *strb
= st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
if (strb) {
/* Hook for copying "fake" frontbuffer if necessary:
*/
st_manager_flush_frontbuffer(st);
}
}
/** Check if we have a front color buffer and if it's been drawn to. */
static INLINE GLboolean
is_front_buffer_dirty(struct st_context *st)
{
if (st->frontbuffer_status == FRONT_STATUS_DIRTY) {
return GL_TRUE;
}
else {
GLframebuffer *fb = st->ctx->DrawBuffer;
struct st_renderbuffer *strb
= st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
return strb && strb->defined;
}
}
/**
* Called via ctx->Driver.FinishRenderTexture.
*/
static void
st_finish_render_texture(struct gl_context *ctx, struct gl_renderbuffer *rb)
{
struct st_renderbuffer *strb = st_renderbuffer(rb);
if (!strb)
return;
strb->is_rtt = FALSE;
/* restore previous framebuffer state */
st_invalidate_state(ctx, _NEW_BUFFERS);
}
/**
* Called via ctx->Driver.FinishRenderTexture.
*/
static void
st_finish_render_texture(struct gl_context *ctx,
struct gl_renderbuffer_attachment *att)
{
struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer);
if (!strb)
return;
strb->rtt = NULL;
/* restore previous framebuffer state */
st_invalidate_state(ctx, _NEW_BUFFERS);
}
/**
* gl_renderbuffer::AllocStorage()
* This is called to allocate the original drawing surface, and
* during window resize.
*/
static GLboolean
st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
GLenum internalFormat,
GLuint width, GLuint height)
{
struct pipe_context *pipe = ctx->st->pipe;
struct st_renderbuffer *strb = st_renderbuffer(rb);
enum pipe_format format;
if (strb->format != PIPE_FORMAT_NONE)
format = strb->format;
else
format = st_choose_renderbuffer_format(pipe->screen, internalFormat);
/* init renderbuffer fields */
strb->Base.Width = width;
strb->Base.Height = height;
init_renderbuffer_bits(strb, format);
strb->defined = GL_FALSE; /* undefined contents now */
if(strb->software) {
struct pipe_format_block block;
size_t size;
_mesa_free(strb->data);
assert(strb->format != PIPE_FORMAT_NONE);
pf_get_block(strb->format, &block);
strb->stride = pf_get_stride(&block, width);
size = pf_get_2d_size(&block, strb->stride, height);
strb->data = _mesa_malloc(size);
return strb->data != NULL;
}
else {
struct pipe_texture template;
unsigned surface_usage;
/* Free the old surface and texture
*/
pipe_surface_reference( &strb->surface, NULL );
pipe_texture_reference( &strb->texture, NULL );
/* Setup new texture template.
*/
memset(&template, 0, sizeof(template));
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);
}
}
/**
* Flush the front buffer if the current context renders to the front buffer.
*/
void
st_manager_flush_frontbuffer(struct st_context *st)
{
struct st_framebuffer *stfb = st_ws_framebuffer(st->ctx->DrawBuffer);
struct st_renderbuffer *strb = NULL;
if (stfb)
strb = st_renderbuffer(stfb->Base.Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
if (!strb)
return;
/* never a dummy fb */
assert(&stfb->Base != _mesa_get_incomplete_framebuffer());
stfb->iface->flush_front(stfb->iface, ST_ATTACHMENT_FRONT_LEFT);
}
/**
* Determine if we need to clear the depth buffer by drawing a quad.
*/
static INLINE GLboolean
check_clear_depth_with_quad(GLcontext *ctx, struct gl_renderbuffer *rb)
{
const struct st_renderbuffer *strb = st_renderbuffer(rb);
const GLboolean isDS = pf_is_depth_and_stencil(strb->surface->format);
if (ctx->Scissor.Enabled)
return TRUE;
if (isDS &&
ctx->DrawBuffer->Visual.stencilBits > 0)
return TRUE;
return FALSE;
}
/**
* Called via ctx->Driver.UnmapRenderbuffer.
*/
static void
st_UnmapRenderbuffer(struct gl_context *ctx,
struct gl_renderbuffer *rb)
{
struct st_context *st = st_context(ctx);
struct st_renderbuffer *strb = st_renderbuffer(rb);
struct pipe_context *pipe = st->pipe;
if (strb->software) {
/* software-allocated renderbuffer (probably an accum buffer) */
return;
}
pipe_transfer_unmap(pipe, strb->transfer);
strb->transfer = NULL;
}
/**
* gl_renderbuffer::AllocStorage()
* This is called to allocate the original drawing surface, and
* during window resize.
*/
static GLboolean
st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
GLenum internalFormat,
GLuint width, GLuint height)
{
struct pipe_context *pipe = ctx->st->pipe;
struct st_renderbuffer *strb = st_renderbuffer(rb);
struct pipe_texture template;
unsigned surface_usage;
/* Free the old surface and texture
*/
pipe_surface_reference( &strb->surface, NULL );
pipe_texture_reference( &strb->texture, NULL );
memset(&template, 0, sizeof(template));
/**
* Called by ctx->Driver.RenderTexture
*/
static void
st_render_texture(struct gl_context *ctx,
struct gl_framebuffer *fb,
struct gl_renderbuffer_attachment *att)
{
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct gl_renderbuffer *rb = att->Renderbuffer;
struct st_renderbuffer *strb = st_renderbuffer(rb);
struct pipe_resource *pt;
if (!st_finalize_texture(ctx, pipe, att->Texture))
return;
pt = st_get_texobj_resource(att->Texture);
assert(pt);
/* point renderbuffer at texobject */
strb->is_rtt = TRUE;
strb->rtt_face = att->CubeMapFace;
strb->rtt_slice = att->Zoffset;
strb->rtt_layered = att->Layered;
pipe_resource_reference(&strb->texture, pt);
pipe_surface_release(pipe, &strb->surface);
st_update_renderbuffer_surface(st, strb);
strb->Base.Format = st_pipe_format_to_mesa_format(pt->format);
/* Invalidate buffer state so that the pipe's framebuffer state
* gets updated.
* That's where the new renderbuffer (which we just created) gets
* passed to the pipe as a (color/depth) render target.
*/
st_invalidate_state(ctx, _NEW_BUFFERS);
/* Need to trigger a call to update_framebuffer() since we just
* attached a new renderbuffer.
*/
ctx->NewState |= _NEW_BUFFERS;
}
/**
* Determine if we need to clear the depth buffer by drawing a quad.
*/
static INLINE GLboolean
check_clear_depth_with_quad(struct gl_context *ctx, struct gl_renderbuffer *rb,
boolean ds_separate)
{
const struct st_renderbuffer *strb = st_renderbuffer(rb);
const GLboolean isDS = util_format_is_depth_and_stencil(strb->surface->format);
if (ctx->Scissor.Enabled &&
(ctx->Scissor.X != 0 ||
ctx->Scissor.Y != 0 ||
ctx->Scissor.Width < rb->Width ||
ctx->Scissor.Height < rb->Height))
return GL_TRUE;
if (!ds_separate && isDS && ctx->DrawBuffer->Visual.stencilBits > 0)
return GL_TRUE;
return GL_FALSE;
}
static void
st_egl_image_target_renderbuffer_storage(struct gl_context *ctx,
struct gl_renderbuffer *rb,
GLeglImageOES image_handle)
{
struct st_renderbuffer *strb = st_renderbuffer(rb);
struct st_egl_image stimg;
if (st_get_egl_image(ctx, image_handle, PIPE_BIND_RENDER_TARGET,
"glEGLImageTargetRenderbufferStorage",
&stimg)) {
struct pipe_context *pipe = st_context(ctx)->pipe;
struct pipe_surface *ps, surf_tmpl;
u_surface_default_template(&surf_tmpl, stimg.texture);
surf_tmpl.format = stimg.format;
surf_tmpl.u.tex.level = stimg.level;
surf_tmpl.u.tex.first_layer = stimg.layer;
surf_tmpl.u.tex.last_layer = stimg.layer;
ps = pipe->create_surface(pipe, stimg.texture, &surf_tmpl);
pipe_resource_reference(&stimg.texture, NULL);
if (!ps)
return;
strb->Base.Width = ps->width;
strb->Base.Height = ps->height;
strb->Base.Format = st_pipe_format_to_mesa_format(ps->format);
strb->Base._BaseFormat = st_pipe_format_to_base_format(ps->format);
strb->Base.InternalFormat = strb->Base._BaseFormat;
struct pipe_surface **psurf =
util_format_is_srgb(ps->format) ? &strb->surface_srgb :
&strb->surface_linear;
pipe_surface_reference(psurf, ps);
strb->surface = *psurf;
pipe_resource_reference(&strb->texture, ps->texture);
pipe_surface_reference(&ps, NULL);
}
}
/**
* Tell the screen to display the front color buffer on-screen.
*/
static void
display_front_buffer(struct st_context *st)
{
GLframebuffer *fb = st->ctx->DrawBuffer;
struct st_renderbuffer *strb
= st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
if (strb) {
struct pipe_surface *front_surf = strb->surface;
/* Hook for copying "fake" frontbuffer if necessary:
*/
st->pipe->screen->flush_frontbuffer( st->pipe->screen, front_surf,
st->pipe->priv );
/*
st->frontbuffer_status = FRONT_STATUS_UNDEFINED;
*/
}
}
/**
* Update the attachments to validate by looping the existing renderbuffers.
*/
static void
st_framebuffer_update_attachments(struct st_framebuffer *stfb)
{
gl_buffer_index idx;
stfb->num_statts = 0;
for (idx = 0; idx < BUFFER_COUNT; idx++) {
struct st_renderbuffer *strb;
enum st_attachment_type statt;
strb = st_renderbuffer(stfb->Base.Attachment[idx].Renderbuffer);
if (!strb || strb->software)
continue;
statt = buffer_index_to_attachment(idx);
if (statt != ST_ATTACHMENT_INVALID &&
st_visual_have_buffers(stfb->iface->visual, 1 << statt))
stfb->statts[stfb->num_statts++] = statt;
}
stfb->stamp++;
}
static GLboolean
st_renderbuffer_alloc_sw_storage(struct gl_context * ctx,
struct gl_renderbuffer *rb,
GLenum internalFormat,
GLuint width, GLuint height)
{
struct st_context *st = st_context(ctx);
struct st_renderbuffer *strb = st_renderbuffer(rb);
enum pipe_format format;
size_t size;
free(strb->data);
strb->data = NULL;
if (internalFormat == GL_RGBA16_SNORM) {
/* Special case for software accum buffers. Otherwise, if the
* call to st_choose_renderbuffer_format() fails (because the
* driver doesn't support signed 16-bit/channel colors) we'd
* just return without allocating the software accum buffer.
*/
format = PIPE_FORMAT_R16G16B16A16_SNORM;
}
else {
format = st_choose_renderbuffer_format(st, internalFormat, 0);
/* Not setting gl_renderbuffer::Format here will cause
* FRAMEBUFFER_UNSUPPORTED and ValidateFramebuffer will not be called.
*/
if (format == PIPE_FORMAT_NONE) {
return GL_TRUE;
}
}
strb->Base.Format = st_pipe_format_to_mesa_format(format);
size = _mesa_format_image_size(strb->Base.Format, width, height, 1);
strb->data = malloc(size);
return strb->data != NULL;
}
void
st_clear_accum_buffer(GLcontext *ctx, struct gl_renderbuffer *rb)
{
struct st_renderbuffer *acc_strb = st_renderbuffer(rb);
const GLint xpos = ctx->DrawBuffer->_Xmin;
const GLint ypos = ctx->DrawBuffer->_Ymin;
const GLint width = ctx->DrawBuffer->_Xmax - xpos;
const GLint height = ctx->DrawBuffer->_Ymax - ypos;
size_t stride = acc_strb->stride;
GLubyte *data = acc_strb->data;
if(!data)
return;
switch (acc_strb->format) {
case PIPE_FORMAT_R16G16B16A16_SNORM:
{
GLshort r = FLOAT_TO_SHORT(ctx->Accum.ClearColor[0]);
GLshort g = FLOAT_TO_SHORT(ctx->Accum.ClearColor[1]);
GLshort b = FLOAT_TO_SHORT(ctx->Accum.ClearColor[2]);
GLshort a = FLOAT_TO_SHORT(ctx->Accum.ClearColor[3]);
int i, j;
for (i = 0; i < height; i++) {
GLshort *dst = (GLshort *) (data + (ypos + i) * stride + xpos * 8);
for (j = 0; j < width; j++) {
dst[0] = r;
dst[1] = g;
dst[2] = b;
dst[3] = a;
dst += 4;
}
}
}
break;
default:
_mesa_problem(ctx, "unexpected format in st_clear_accum_buffer()");
}
}
/**
* Validate a framebuffer to make sure up-to-date pipe_textures are used.
* The context we need to pass in is s dummy context needed only to be
* able to get a pipe context to create pipe surfaces, and to have a
* context to call _mesa_resize_framebuffer():
* (That should probably be rethought, since those surfaces become
* drawable state, not context state, and can be freed by another pipe
* context).
*/
static void
st_framebuffer_validate(struct st_framebuffer *stfb,
struct st_context *st)
{
struct pipe_resource *textures[ST_ATTACHMENT_COUNT];
uint width, height;
unsigned i;
boolean changed = FALSE;
int32_t new_stamp = p_atomic_read(&stfb->iface->stamp);
if (stfb->iface_stamp == new_stamp)
return;
/* validate the fb */
do {
if (!stfb->iface->validate(stfb->iface, stfb->statts,
stfb->num_statts, textures))
return;
stfb->iface_stamp = new_stamp;
new_stamp = p_atomic_read(&stfb->iface->stamp);
} while(stfb->iface_stamp != new_stamp);
width = stfb->Base.Width;
height = stfb->Base.Height;
for (i = 0; i < stfb->num_statts; i++) {
struct st_renderbuffer *strb;
struct pipe_surface *ps, surf_tmpl;
gl_buffer_index idx;
if (!textures[i])
continue;
idx = attachment_to_buffer_index(stfb->statts[i]);
if (idx >= BUFFER_COUNT) {
pipe_resource_reference(&textures[i], NULL);
continue;
}
strb = st_renderbuffer(stfb->Base.Attachment[idx].Renderbuffer);
assert(strb);
if (strb->texture == textures[i]) {
pipe_resource_reference(&textures[i], NULL);
continue;
}
u_surface_default_template(&surf_tmpl, textures[i],
PIPE_BIND_RENDER_TARGET);
ps = st->pipe->create_surface(st->pipe, textures[i], &surf_tmpl);
if (ps) {
pipe_surface_reference(&strb->surface, ps);
pipe_resource_reference(&strb->texture, ps->texture);
/* ownership transfered */
pipe_surface_reference(&ps, NULL);
changed = TRUE;
strb->Base.Width = strb->surface->width;
strb->Base.Height = strb->surface->height;
width = strb->Base.Width;
height = strb->Base.Height;
}
pipe_resource_reference(&textures[i], NULL);
}
if (changed) {
++stfb->stamp;
_mesa_resize_framebuffer(st->ctx, &stfb->Base, width, height);
}
}
/**
* 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);
}
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);
}
}
}
}
