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Add a conformance test using alpha textures

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This adds a conformance test with an alpha-component texture. The
texture is rendered using a pipeline with the same layer combine mode
as cogl-pango.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 05190519bad4519e66cbdb5326943c832d15a841)
This commit is contained in:
Neil Roberts 2012-11-19 17:28:53 +00:00 committed by Robert Bragg
parent 996260ceab
commit fda5e15bda
3 changed files with 126 additions and 0 deletions
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1
tests/conform/Makefile.am
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@ -60,6 +60,7 @@ test_sources = \
test-alpha-test.c \
test-map-buffer-range.c \
test-npot-texture.c \
test-alpha-textures.c \
$(NULL)
test_conformance_SOURCES = $(common_sources) $(test_sources)

124
tests/conform/test-alpha-textures.c Normal file
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@ -0,0 +1,124 @@
#include <cogl/cogl.h>
#include <string.h>
#include "test-utils.h"
static void
create_pipeline (CoglTexture **tex_out,
CoglPipeline **pipeline_out)
{
CoglTexture2D *tex;
CoglPipeline *pipeline;
static const uint8_t tex_data[] =
{ 0x00, 0x44, 0x88, 0xcc };
tex = cogl_texture_2d_new_from_data (test_ctx,
2, 2, /* width/height */
COGL_PIXEL_FORMAT_A_8, /* format */
COGL_PIXEL_FORMAT_ANY, /* int. format */
2, /* rowstride */
tex_data,
NULL);
pipeline = cogl_pipeline_new (test_ctx);
cogl_pipeline_set_layer_filters (pipeline,
0, /* layer */
COGL_PIPELINE_FILTER_NEAREST,
COGL_PIPELINE_FILTER_NEAREST);
cogl_pipeline_set_layer_wrap_mode (pipeline,
0, /* layer */
COGL_PIPELINE_WRAP_MODE_CLAMP_TO_EDGE);
/* This is the layer combine used by cogl-pango */
cogl_pipeline_set_layer_combine (pipeline,
0, /* layer */
"RGBA = MODULATE (PREVIOUS, TEXTURE[A])",
NULL);
cogl_pipeline_set_layer_texture (pipeline,
0, /* layer */
COGL_TEXTURE (tex));
*pipeline_out = pipeline;
*tex_out = COGL_TEXTURE (tex);
}
void
test_alpha_textures (void)
{
CoglTexture *tex1, *tex2;
CoglPipeline *pipeline1, *pipeline2;
int fb_width = cogl_framebuffer_get_width (test_fb);
int fb_height = cogl_framebuffer_get_height (test_fb);
uint8_t replacement_data[1] = { 0xff };
create_pipeline (&tex1, &pipeline1);
cogl_framebuffer_draw_rectangle (test_fb,
pipeline1,
-1.0f, 1.0f, /* x1/y1 */
1.0f, 0.0f /* x2/y2 */);
create_pipeline (&tex2, &pipeline2);
cogl_texture_set_region (tex2,
0, 0, /* src_x/y */
1, 1, /* dst_x/y */
1, 1, /* dst_width / dst_height */
1, 1, /* width / height */
COGL_PIXEL_FORMAT_A_8,
1, /* rowstride */
replacement_data);
cogl_framebuffer_draw_rectangle (test_fb,
pipeline2,
-1.0f, 0.0f, /* x1/y1 */
1.0f, -1.0f /* x2/y2 */);
cogl_object_unref (tex1);
cogl_object_unref (tex2);
cogl_object_unref (pipeline1);
cogl_object_unref (pipeline2);
/* Unmodified texture */
test_utils_check_pixel (test_fb,
fb_width / 4,
fb_height / 8,
0x000000ff);
test_utils_check_pixel (test_fb,
fb_width * 3 / 4,
fb_height / 8,
0x444444ff);
test_utils_check_pixel (test_fb,
fb_width / 4,
fb_height * 3 / 8,
0x888888ff);
test_utils_check_pixel (test_fb,
fb_width * 3 / 4,
fb_height * 3 / 8,
0xccccccff);
/* Modified texture */
test_utils_check_pixel (test_fb,
fb_width / 4,
fb_height * 5 / 8,
0x000000ff);
test_utils_check_pixel (test_fb,
fb_width * 3 / 4,
fb_height * 5 / 8,
0x444444ff);
test_utils_check_pixel (test_fb,
fb_width / 4,
fb_height * 7 / 8,
0x888888ff);
test_utils_check_pixel (test_fb,
fb_width * 3 / 4,
fb_height * 7 / 8,
0xffffffff);
if (cogl_test_verbose ())
g_print ("OK\n");
}

1
tests/conform/test-conform-main.c
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@ -77,6 +77,7 @@ main (int argc, char **argv)
ADD_TEST (test_atlas_migration, 0, 0);
ADD_TEST (test_read_texture_formats, 0, 0);
ADD_TEST (test_write_texture_formats, 0, 0);
ADD_TEST (test_alpha_textures, 0, 0);
UNPORTED_TEST (test_vertex_buffer_contiguous);
UNPORTED_TEST (test_vertex_buffer_interleved);