f4fd724caf
This adds a test to make sure that if the same pipeline is used to draw two primitives, one which doesn't need blending because it has an opaque color associated, and another using a color attribute that requires blending then Cogl should recognize that it needs to enable blending for the second primitive even though the pipeline hasn't changed. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit c15d91f1c6293bebd4494d1e20586121483cddef)
65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
#include <cogl/cogl.h>
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#include <string.h>
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#include "test-utils.h"
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static void
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paint (void)
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{
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CoglPipeline *pipeline = cogl_pipeline_new (test_ctx);
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int width = cogl_framebuffer_get_width (test_fb);
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int half_width = width / 2;
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int height = cogl_framebuffer_get_height (test_fb);
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CoglVertexP2 tri0_vertices[] = {
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{ 0, 0 },
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{ 0, height },
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{ half_width, height },
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};
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CoglVertexP2C4 tri1_vertices[] = {
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{ half_width, 0, 0x80, 0x80, 0x80, 0x80 },
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{ half_width, height, 0x80, 0x80, 0x80, 0x80 },
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{ width, height, 0x80, 0x80, 0x80, 0x80 },
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};
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CoglPrimitive *tri0;
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CoglPrimitive *tri1;
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cogl_framebuffer_clear4f (test_fb, COGL_BUFFER_BIT_COLOR, 0, 0, 0, 0);
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tri0 = cogl_primitive_new_p2 (test_ctx, COGL_VERTICES_MODE_TRIANGLES,
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3, tri0_vertices);
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tri1 = cogl_primitive_new_p2c4 (test_ctx, COGL_VERTICES_MODE_TRIANGLES,
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3, tri1_vertices);
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/* Check that cogl correctly handles the case where we draw
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* different primitives same pipeline and switch from using the
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* opaque color associated with the pipeline and using a colour
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* attribute with an alpha component which implies blending is
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* required.
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*
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* If Cogl gets this wrong then then in all likelyhood the second
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* primitive will be drawn with blending still disabled.
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*/
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cogl_framebuffer_draw_primitive (test_fb, pipeline, tri0);
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cogl_framebuffer_draw_primitive (test_fb, pipeline, tri1);
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test_utils_check_pixel_and_alpha (test_fb,
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half_width + 5,
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height - 5,
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0x80808080);
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}
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void
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test_blend (void)
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{
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cogl_framebuffer_orthographic (test_fb, 0, 0,
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cogl_framebuffer_get_width (test_fb),
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cogl_framebuffer_get_height (test_fb),
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-1,
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100);
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paint ();
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}
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