static void
_cairo_gl_context_setup_operand (cairo_gl_context_t *ctx,
cairo_gl_tex_t tex_unit,
cairo_gl_operand_t *operand,
unsigned int vertex_size,
unsigned int vertex_offset)
{
cairo_gl_dispatch_t *dispatch = &ctx->dispatch;
cairo_bool_t needs_setup;
/* XXX: we need to do setup when switching from shaders
* to no shaders (or back) */
needs_setup = ctx->vertex_size != vertex_size;
needs_setup |= _cairo_gl_operand_needs_setup (&ctx->operands[tex_unit],
operand,
vertex_offset);
if (needs_setup) {
_cairo_gl_composite_flush (ctx);
_cairo_gl_context_destroy_operand (ctx, tex_unit);
}
memcpy (&ctx->operands[tex_unit], operand, sizeof (cairo_gl_operand_t));
ctx->operands[tex_unit].vertex_offset = vertex_offset;
if (! needs_setup)
return;
switch (operand->type) {
default:
case CAIRO_GL_OPERAND_COUNT:
ASSERT_NOT_REACHED;
case CAIRO_GL_OPERAND_NONE:
break;
/* fall through */
case CAIRO_GL_OPERAND_CONSTANT:
break;
case CAIRO_GL_OPERAND_TEXTURE:
glActiveTexture (GL_TEXTURE0 + tex_unit);
glBindTexture (ctx->tex_target, operand->texture.tex);
_cairo_gl_texture_set_extend (ctx, ctx->tex_target,
operand->texture.attributes.extend);
_cairo_gl_texture_set_filter (ctx, ctx->tex_target,
operand->texture.attributes.filter);
dispatch->VertexAttribPointer (CAIRO_GL_TEXCOORD0_ATTRIB_INDEX + tex_unit, 2,
GL_FLOAT, GL_FALSE, vertex_size,
(void *) (uintptr_t) vertex_offset);
dispatch->EnableVertexAttribArray (CAIRO_GL_TEXCOORD0_ATTRIB_INDEX + tex_unit);
break;
case CAIRO_GL_OPERAND_LINEAR_GRADIENT:
case CAIRO_GL_OPERAND_RADIAL_GRADIENT_A0:
case CAIRO_GL_OPERAND_RADIAL_GRADIENT_NONE:
case CAIRO_GL_OPERAND_RADIAL_GRADIENT_EXT:
glActiveTexture (GL_TEXTURE0 + tex_unit);
glBindTexture (ctx->tex_target, operand->gradient.gradient->tex);
_cairo_gl_texture_set_extend (ctx, ctx->tex_target, operand->gradient.extend);
_cairo_gl_texture_set_filter (ctx, ctx->tex_target, CAIRO_FILTER_BILINEAR);
dispatch->VertexAttribPointer (CAIRO_GL_TEXCOORD0_ATTRIB_INDEX + tex_unit, 2,
GL_FLOAT, GL_FALSE, vertex_size,
(void *) (uintptr_t) vertex_offset);
dispatch->EnableVertexAttribArray (CAIRO_GL_TEXCOORD0_ATTRIB_INDEX + tex_unit);
break;
}
}
static void
_cairo_gl_context_setup_operand (cairo_gl_context_t *ctx,
cairo_gl_tex_t tex_unit,
cairo_gl_operand_t *operand,
unsigned int vertex_size,
unsigned int vertex_offset)
{
cairo_gl_dispatch_t *dispatch = &ctx->dispatch;
cairo_bool_t needs_setup;
cairo_bool_t needs_flush = TRUE;
/* XXX: we need to do setup when switching from shaders
* to no shaders (or back) */
needs_setup = ctx->vertex_size != vertex_size;
needs_setup |= _cairo_gl_operand_needs_setup (&ctx->operands[tex_unit],
operand,
vertex_offset,
&needs_flush);
if (needs_setup && needs_flush) {
_cairo_gl_composite_flush (ctx);
_cairo_gl_context_destroy_operand (ctx, tex_unit);
}
memcpy (&ctx->operands[tex_unit], operand, sizeof (cairo_gl_operand_t));
ctx->operands[tex_unit].vertex_offset = vertex_offset;
if (! needs_setup)
return;
switch (operand->type) {
default:
case CAIRO_GL_OPERAND_COUNT:
ASSERT_NOT_REACHED;
case CAIRO_GL_OPERAND_NONE:
break;
/* fall through */
case CAIRO_GL_OPERAND_CONSTANT:
if (operand->use_color_attribute) {
dispatch->VertexAttribPointer (CAIRO_GL_COLOR_ATTRIB_INDEX, 4,
GL_UNSIGNED_BYTE, GL_TRUE, vertex_size,
ctx->vb + vertex_offset);
dispatch->EnableVertexAttribArray (CAIRO_GL_COLOR_ATTRIB_INDEX);
}
break;
case CAIRO_GL_OPERAND_TEXTURE:
if (ctx->states_cache.active_texture != GL_TEXTURE0 + tex_unit) {
glActiveTexture (GL_TEXTURE0 + tex_unit);
ctx->states_cache.active_texture = GL_TEXTURE0 + tex_unit;
}
glBindTexture (ctx->tex_target, operand->texture.tex);
_cairo_gl_texture_set_extend (ctx, ctx->tex_target,
operand->texture.attributes.extend,
operand->texture.use_atlas);
_cairo_gl_texture_set_filter (ctx, ctx->tex_target,
operand->texture.attributes.filter);
dispatch->VertexAttribPointer (CAIRO_GL_TEXCOORD0_ATTRIB_INDEX + tex_unit, 2,
GL_FLOAT, GL_FALSE, vertex_size,
ctx->vb + vertex_offset);
dispatch->EnableVertexAttribArray (CAIRO_GL_TEXCOORD0_ATTRIB_INDEX + tex_unit);
if (operand->texture.use_atlas) {
dispatch->VertexAttribPointer (CAIRO_GL_START_COORD0_ATTRIB_INDEX + tex_unit,
2, GL_FLOAT, GL_FALSE,
vertex_size,
ctx->vb + vertex_offset + 2 * sizeof (float));
dispatch->EnableVertexAttribArray (CAIRO_GL_START_COORD0_ATTRIB_INDEX + tex_unit);
dispatch->VertexAttribPointer (CAIRO_GL_STOP_COORD0_ATTRIB_INDEX + tex_unit,
2, GL_FLOAT, GL_FALSE,
vertex_size,
ctx->vb + vertex_offset + 4 * sizeof (float));
dispatch->EnableVertexAttribArray (CAIRO_GL_STOP_COORD0_ATTRIB_INDEX + tex_unit);
}
break;
case CAIRO_GL_OPERAND_LINEAR_GRADIENT:
case CAIRO_GL_OPERAND_RADIAL_GRADIENT_A0:
case CAIRO_GL_OPERAND_RADIAL_GRADIENT_NONE:
case CAIRO_GL_OPERAND_RADIAL_GRADIENT_EXT:
if(ctx->states_cache.active_texture != GL_TEXTURE0 + tex_unit) {
glActiveTexture (GL_TEXTURE0 + tex_unit);
ctx->states_cache.active_texture = GL_TEXTURE0 + tex_unit;
}
glBindTexture (ctx->tex_target, operand->gradient.gradient->tex);
_cairo_gl_texture_set_extend (ctx, ctx->tex_target,
operand->gradient.extend, FALSE);
_cairo_gl_texture_set_filter (ctx, ctx->tex_target, CAIRO_FILTER_BILINEAR);
dispatch->VertexAttribPointer (CAIRO_GL_TEXCOORD0_ATTRIB_INDEX + tex_unit, 2,
GL_FLOAT, GL_FALSE, vertex_size,
ctx->vb + vertex_offset);
dispatch->EnableVertexAttribArray (CAIRO_GL_TEXCOORD0_ATTRIB_INDEX + tex_unit);
break;
}
}
