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Adds ColorMask support to Cogl

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This adds CoglPipeline and CoglFramebuffer support for setting a color
mask which is a bit mask defining which color channels should be written
to the current framebuffer.

The final color mask is the intersection of the framebuffer color mask
and the pipeline color mask. The framebuffer mask affects all rendering
to the framebuffer while the pipeline masks can be used to affect
individual primitives.

Reviewed-by: Neil Roberts <neil@linux.intel.com>
This commit is contained in:
Robert Bragg
2011-07-11 02:27:54 +01:00
parent 9b6c1eb2cc
commit 8b34a39319
11 changed files with 260 additions and 3 deletions
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18
cogl/cogl-pipeline-opengl.c
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@ -607,6 +607,24 @@ _cogl_pipeline_flush_color_blend_alpha_depth_state (
}
}
if (pipelines_difference & COGL_PIPELINE_STATE_LOGIC_OPS)
{
CoglPipeline *authority =
_cogl_pipeline_get_authority (pipeline, COGL_PIPELINE_STATE_LOGIC_OPS);
CoglPipelineLogicOpsState *logic_ops_state = &authority->big_state->logic_ops_state;
CoglColorMask color_mask = logic_ops_state->color_mask;
CoglFramebuffer *draw_framebuffer = cogl_get_draw_framebuffer ();
if (draw_framebuffer)
color_mask &= draw_framebuffer->color_mask;
GE (ctx, glColorMask (!!(color_mask & COGL_COLOR_MASK_RED),
!!(color_mask & COGL_COLOR_MASK_GREEN),
!!(color_mask & COGL_COLOR_MASK_BLUE),
!!(color_mask & COGL_COLOR_MASK_ALPHA)));
ctx->current_gl_color_mask = color_mask;
}
if (pipeline->real_blend_enable != ctx->gl_blend_enable_cache)
{
if (pipeline->real_blend_enable)