static unsigned
get_texture_format_swizzle(const struct st_context *st,
const struct st_texture_object *stObj,
unsigned glsl_version)
{
GLenum baseFormat = _mesa_texture_base_format(&stObj->base);
unsigned tex_swizzle;
if (baseFormat != GL_NONE) {
GLenum depth_mode = stObj->base.DepthMode;
/* In ES 3.0, DEPTH_TEXTURE_MODE is expected to be GL_RED for textures
* with depth component data specified with a sized internal format.
*/
if (_mesa_is_gles3(st->ctx) &&
util_format_is_depth_or_stencil(stObj->pt->format)) {
const struct gl_texture_image *firstImage =
_mesa_base_tex_image(&stObj->base);
if (firstImage->InternalFormat != GL_DEPTH_COMPONENT &&
firstImage->InternalFormat != GL_DEPTH_STENCIL &&
firstImage->InternalFormat != GL_STENCIL_INDEX)
depth_mode = GL_RED;
}
tex_swizzle = compute_texture_format_swizzle(baseFormat,
depth_mode,
stObj->pt->format,
glsl_version);
}
else {
tex_swizzle = SWIZZLE_XYZW;
}
/* Combine the texture format swizzle with user's swizzle */
return swizzle_swizzle(stObj->base._Swizzle, tex_swizzle);
}
static struct pipe_sampler_view *
st_get_texture_sampler_view_from_stobj(struct st_context *st,
struct st_texture_object *stObj,
enum pipe_format format,
unsigned glsl_version)
{
struct pipe_sampler_view **sv;
const struct st_texture_image *firstImage;
if (!stObj || !stObj->pt) {
return NULL;
}
sv = st_texture_get_sampler_view(st, stObj);
if (util_format_is_depth_and_stencil(format)) {
if (stObj->base.StencilSampling)
format = util_format_stencil_only(format);
else {
firstImage = st_texture_image_const(_mesa_base_tex_image(&stObj->base));
if (firstImage->base._BaseFormat == GL_STENCIL_INDEX)
format = util_format_stencil_only(format);
}
}
/* if sampler view has changed dereference it */
if (*sv) {
if (check_sampler_swizzle(stObj, *sv, glsl_version) ||
(format != (*sv)->format) ||
gl_target_to_pipe(stObj->base.Target) != (*sv)->target ||
stObj->base.MinLevel + stObj->base.BaseLevel != (*sv)->u.tex.first_level ||
last_level(stObj) != (*sv)->u.tex.last_level ||
stObj->base.MinLayer != (*sv)->u.tex.first_layer ||
last_layer(stObj) != (*sv)->u.tex.last_layer) {
pipe_sampler_view_reference(sv, NULL);
}
}
if (!*sv) {
*sv = st_create_texture_sampler_view_from_stobj(st->pipe, stObj,
format, glsl_version);
} else if ((*sv)->context != st->pipe) {
/* Recreate view in correct context, use existing view as template */
struct pipe_sampler_view *new_sv =
st->pipe->create_sampler_view(st->pipe, stObj->pt, *sv);
pipe_sampler_view_reference(sv, NULL);
*sv = new_sv;
}
return *sv;
}
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);
}
