mirror of
https://github.com/brl/mutter.git
synced 2024-11-26 18:11:05 -05:00
74 lines
2.4 KiB
C
74 lines
2.4 KiB
C
#include <cogl/cogl.h>
|
|
#include <string.h>
|
|
|
|
#include "test-utils.h"
|
|
|
|
static CoglTexture2D *
|
|
create_texture (CoglContext *context)
|
|
{
|
|
static const uint8_t data[] =
|
|
{
|
|
0xff, 0x00, 0x00, 0xff,
|
|
0x00, 0xfa, 0x00, 0xfa
|
|
};
|
|
|
|
return cogl_texture_2d_new_from_data (context,
|
|
2, 1, /* width/height */
|
|
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
|
|
4, /* rowstride */
|
|
data,
|
|
NULL /* error */);
|
|
}
|
|
|
|
void
|
|
test_alpha_test (void)
|
|
{
|
|
CoglTexture *tex = create_texture (test_ctx);
|
|
CoglPipeline *pipeline = cogl_pipeline_new (test_ctx);
|
|
int fb_width = cogl_framebuffer_get_width (test_fb);
|
|
int fb_height = cogl_framebuffer_get_height (test_fb);
|
|
CoglColor clear_color;
|
|
|
|
cogl_pipeline_set_layer_texture (pipeline, 0, tex);
|
|
cogl_pipeline_set_layer_filters (pipeline, 0,
|
|
COGL_PIPELINE_FILTER_NEAREST,
|
|
COGL_PIPELINE_FILTER_NEAREST);
|
|
cogl_pipeline_set_alpha_test_function (pipeline,
|
|
COGL_PIPELINE_ALPHA_FUNC_GEQUAL,
|
|
254 / 255.0f /* alpha reference */);
|
|
|
|
cogl_color_init_from_4ub (&clear_color, 0x00, 0x00, 0xff, 0xff);
|
|
cogl_framebuffer_clear (test_fb,
|
|
COGL_BUFFER_BIT_COLOR,
|
|
&clear_color);
|
|
|
|
cogl_framebuffer_draw_rectangle (test_fb,
|
|
pipeline,
|
|
-1, -1,
|
|
1, 1);
|
|
|
|
cogl_object_unref (pipeline);
|
|
cogl_object_unref (tex);
|
|
|
|
/* The left side of the framebuffer should use the first pixel from
|
|
* the texture which is red */
|
|
test_utils_check_region (test_fb,
|
|
2, 2,
|
|
fb_width / 2 - 4,
|
|
fb_height - 4,
|
|
0xff0000ff);
|
|
/* The right side of the framebuffer should use the clear color
|
|
* because the second pixel from the texture is clipped from the
|
|
* alpha test */
|
|
test_utils_check_region (test_fb,
|
|
fb_width / 2 + 2,
|
|
2,
|
|
fb_width / 2 - 4,
|
|
fb_height - 4,
|
|
0x0000ffff);
|
|
|
|
if (cogl_test_verbose ())
|
|
g_print ("OK\n");
|
|
}
|
|
|