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test-texture-3d: Add a test for multi-texturing 3D and 2D textures

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The ARBfp fragend has a bug when the texture combine string references
another texture unit where it will use the texture type of the current
layer rather than the texture type of the layer the string refers to.
This patch adds a small test which demonstrates that.

Reviewed-by: Robert Bragg <robert@linux.intel.com>
This commit is contained in:
Neil Roberts 2012-02-09 20:32:08 +00:00
parent 7cd2f25eb0
commit 971d7f33a0
1 changed files with 64 additions and 0 deletions
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64
tests/conform/test-texture-3d.c
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@ -196,6 +196,68 @@ validate_result (void)
validate_block (i, 1, i);
}
static void
test_multi_texture (TestState *state)
{
CoglPipeline *pipeline;
CoglHandle tex_3d;
CoglTexture2D *tex_2d;
guint8 tex_data[4];
cogl_framebuffer_clear4f (state->fb, COGL_BUFFER_BIT_COLOR, 0, 0, 0, 1);
/* Tests a pipeline that is using multi-texturing to combine a 3D
texture with a 2D texture. The texture from another layer is
sampled with TEXTURE_? just to pick up a specific bug that was
happening with the ARBfp fragend */
pipeline = cogl_pipeline_new ();
tex_data[0] = 0xff;
tex_data[1] = 0x00;
tex_data[2] = 0x00;
tex_data[3] = 0xff;
tex_2d = cogl_texture_2d_new_from_data (state->context,
1, 1, /* width/height */
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
4, /* rowstride */
tex_data,
NULL);
cogl_pipeline_set_layer_texture (pipeline, 0, COGL_TEXTURE (tex_2d));
tex_data[0] = 0x00;
tex_data[1] = 0xff;
tex_data[2] = 0x00;
tex_data[3] = 0xff;
tex_3d = cogl_texture_3d_new_from_data (1, 1, 1, /* width/height/depth */
COGL_TEXTURE_NONE,
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
4, /* rowstride */
4, /* image_stride */
tex_data,
NULL);
cogl_pipeline_set_layer_texture (pipeline, 1, COGL_TEXTURE (tex_3d));
cogl_pipeline_set_layer_combine (pipeline, 0,
"RGBA = REPLACE(PREVIOUS)",
NULL);
cogl_pipeline_set_layer_combine (pipeline, 1,
"RGBA = ADD(TEXTURE_0, TEXTURE_1)",
NULL);
cogl_push_source (pipeline);
cogl_rectangle (0, 0, 10, 10);
cogl_pop_source ();
test_utils_check_pixel (5, 5, 0xffff00ff);
cogl_object_unref (tex_2d);
cogl_object_unref (tex_3d);
cogl_object_unref (pipeline);
}
void
test_cogl_texture_3d (TestUtilsGTestFixture *fixture,
void *data)
@ -222,6 +284,8 @@ test_cogl_texture_3d (TestUtilsGTestFixture *fixture,
draw_frame (&state);
validate_result ();
test_multi_texture (&state);
if (g_test_verbose ())
g_print ("OK\n");
}