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Viewing changes to cogl/tests/conform/test-blend.c

  • Committer: RabbitBot
  • Date: 2018-04-11 14:49:36 UTC
  • Revision ID: rabbitbot@elementary.io-20180411144936-hgymqa9d8d1xfpbh
Initial import, version 3.28.0-2

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cogl/tests/conform/test-blend.c
 
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#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_primitive_draw (tri0, test_fb, pipeline);
 
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  cogl_primitive_draw (tri1, test_fb, pipeline);
 
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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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