mutter/cogl/tests/conform/test-framebuffer-get-bits.c

#include <cogl/cogl.h>

#include "test-declarations.h"
#include "test-utils.h"

void
test_framebuffer_get_bits (void)
{
  CoglTexture2D *tex_a =
    cogl_texture_2d_new_with_size (test_ctx,
                                   16, 16); /* width/height */
  CoglOffscreen *offscreen_a =
    cogl_offscreen_new_with_texture (tex_a);
  CoglFramebuffer *fb_a = COGL_FRAMEBUFFER (offscreen_a);
  CoglTexture2D *tex_rgba =
    cogl_texture_2d_new_with_size (test_ctx,
                                   16, 16); /* width/height */
  CoglOffscreen *offscreen_rgba =
    cogl_offscreen_new_with_texture (tex_rgba);
  CoglFramebuffer *fb_rgba = COGL_FRAMEBUFFER (offscreen_rgba);

  cogl_texture_set_components (tex_a,
                               COGL_TEXTURE_COMPONENTS_A);
  cogl_framebuffer_allocate (fb_a, NULL);
  cogl_framebuffer_allocate (fb_rgba, NULL);

  g_assert_cmpint (cogl_framebuffer_get_red_bits (fb_a), ==, 0);
  g_assert_cmpint (cogl_framebuffer_get_green_bits (fb_a), ==, 0);
  g_assert_cmpint (cogl_framebuffer_get_blue_bits (fb_a), ==, 0);
  g_assert_cmpint (cogl_framebuffer_get_alpha_bits (fb_a), >=, 1);

  g_assert_cmpint (cogl_framebuffer_get_red_bits (fb_rgba), >=, 1);
  g_assert_cmpint (cogl_framebuffer_get_green_bits (fb_rgba), >=, 1);
  g_assert_cmpint (cogl_framebuffer_get_blue_bits (fb_rgba), >=, 1);
  g_assert_cmpint (cogl_framebuffer_get_alpha_bits (fb_rgba), >=, 1);

  g_object_unref (fb_rgba);
  cogl_object_unref (tex_rgba);
  g_object_unref (fb_a);
  cogl_object_unref (tex_a);
}