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gl: Only resetup textures if we need to

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This commit is contained in:
Benjamin Otte 2010-06-02 15:53:48 +02:00
parent d9dcafd61a
commit f66500d8b0
1 changed files with 45 additions and 0 deletions
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45
src/cairo-gl-composite.c
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@ -675,15 +675,60 @@ _cairo_gl_operand_setup_fixed (cairo_gl_operand_t *operand,
}
}
static cairo_bool_t
_cairo_gl_operand_needs_setup (cairo_gl_operand_t *dest,
cairo_gl_operand_t *source,
unsigned int vertex_offset)
{
if (dest->type != source->type)
return TRUE;
if (dest->vertex_offset != vertex_offset)
return TRUE;
switch (source->type) {
case CAIRO_GL_OPERAND_NONE:
case CAIRO_GL_OPERAND_SPANS:
return FALSE;
case CAIRO_GL_OPERAND_CONSTANT:
return dest->constant.color[0] != source->constant.color[0] ||
dest->constant.color[1] != source->constant.color[1] ||
dest->constant.color[2] != source->constant.color[2] ||
dest->constant.color[3] != source->constant.color[3];
case CAIRO_GL_OPERAND_TEXTURE:
return dest->texture.surface != source->texture.surface ||
dest->texture.attributes.extend != source->texture.attributes.extend ||
dest->texture.attributes.filter != source->texture.attributes.filter ||
dest->texture.attributes.has_component_alpha != source->texture.attributes.has_component_alpha;
case CAIRO_GL_OPERAND_LINEAR_GRADIENT:
case CAIRO_GL_OPERAND_RADIAL_GRADIENT:
/* XXX: improve this */
return TRUE;
default:
case CAIRO_GL_OPERAND_COUNT:
ASSERT_NOT_REACHED;
break;
}
return TRUE;
}
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_offset)
{
cairo_bool_t needs_setup;
needs_setup = _cairo_gl_operand_needs_setup (&ctx->operands[tex_unit],
operand,
vertex_offset);
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: