123 lines
4.1 KiB
C
123 lines
4.1 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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create_pipeline (CoglTexture **tex_out,
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CoglPipeline **pipeline_out)
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{
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CoglTexture2D *tex;
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CoglPipeline *pipeline;
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static const uint8_t tex_data[] =
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{ 0x00, 0x44, 0x88, 0xcc };
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tex = cogl_texture_2d_new_from_data (test_ctx,
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2, 2, /* width/height */
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COGL_PIXEL_FORMAT_A_8, /* format */
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2, /* rowstride */
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tex_data,
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NULL);
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pipeline = cogl_pipeline_new (test_ctx);
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cogl_pipeline_set_layer_filters (pipeline,
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0, /* layer */
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COGL_PIPELINE_FILTER_NEAREST,
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COGL_PIPELINE_FILTER_NEAREST);
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cogl_pipeline_set_layer_wrap_mode (pipeline,
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0, /* layer */
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COGL_PIPELINE_WRAP_MODE_CLAMP_TO_EDGE);
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/* This is the layer combine used by cogl-pango */
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cogl_pipeline_set_layer_combine (pipeline,
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0, /* layer */
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"RGBA = MODULATE (PREVIOUS, TEXTURE[A])",
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NULL);
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cogl_pipeline_set_layer_texture (pipeline,
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0, /* layer */
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tex);
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*pipeline_out = pipeline;
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*tex_out = tex;
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}
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void
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test_alpha_textures (void)
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{
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CoglTexture *tex1, *tex2;
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CoglPipeline *pipeline1, *pipeline2;
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int fb_width = cogl_framebuffer_get_width (test_fb);
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int fb_height = cogl_framebuffer_get_height (test_fb);
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uint8_t replacement_data[1] = { 0xff };
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create_pipeline (&tex1, &pipeline1);
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cogl_framebuffer_draw_rectangle (test_fb,
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pipeline1,
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-1.0f, 1.0f, /* x1/y1 */
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1.0f, 0.0f /* x2/y2 */);
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create_pipeline (&tex2, &pipeline2);
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cogl_texture_set_region (tex2,
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0, 0, /* src_x/y */
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1, 1, /* dst_x/y */
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1, 1, /* dst_width / dst_height */
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1, 1, /* width / height */
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COGL_PIXEL_FORMAT_A_8,
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1, /* rowstride */
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replacement_data);
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cogl_framebuffer_draw_rectangle (test_fb,
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pipeline2,
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-1.0f, 0.0f, /* x1/y1 */
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1.0f, -1.0f /* x2/y2 */);
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cogl_object_unref (tex1);
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cogl_object_unref (tex2);
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cogl_object_unref (pipeline1);
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cogl_object_unref (pipeline2);
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/* Unmodified texture */
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test_utils_check_pixel (test_fb,
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fb_width / 4,
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fb_height / 8,
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0x000000ff);
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test_utils_check_pixel (test_fb,
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fb_width * 3 / 4,
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fb_height / 8,
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0x444444ff);
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test_utils_check_pixel (test_fb,
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fb_width / 4,
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fb_height * 3 / 8,
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0x888888ff);
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test_utils_check_pixel (test_fb,
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fb_width * 3 / 4,
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fb_height * 3 / 8,
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0xccccccff);
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/* Modified texture */
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test_utils_check_pixel (test_fb,
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fb_width / 4,
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fb_height * 5 / 8,
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0x000000ff);
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test_utils_check_pixel (test_fb,
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fb_width * 3 / 4,
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fb_height * 5 / 8,
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0x444444ff);
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test_utils_check_pixel (test_fb,
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fb_width / 4,
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fb_height * 7 / 8,
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0x888888ff);
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test_utils_check_pixel (test_fb,
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fb_width * 3 / 4,
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fb_height * 7 / 8,
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0xffffffff);
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if (cogl_test_verbose ())
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g_print ("OK\n");
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}
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