static void
paint (void)
{
cg_pipeline_t *pipeline = cg_pipeline_new (test_dev);
cg_texture_t *texture = make_texture ();
int y, x;
cg_pipeline_set_layer_texture (pipeline, 0, texture);
/* Just render the texture in the top left corner */
/* Render the texture using four separate rectangles */
for (y = 0; y < 2; y++)
for (x = 0; x < 2; x++)
cg_framebuffer_draw_textured_rectangle (test_fb,
pipeline,
x * TEXTURE_RENDER_SIZE / 2,
y * TEXTURE_RENDER_SIZE / 2,
(x + 1) *
TEXTURE_RENDER_SIZE / 2,
(y + 1) *
TEXTURE_RENDER_SIZE / 2,
x / 2.0f,
y / 2.0f,
(x + 1) / 2.0f,
(y + 1) / 2.0f);
cg_object_unref (pipeline);
cg_object_unref (texture);
}
static void
test_modify_fragment_layer(TestState *state)
{
cg_pipeline_t *pipeline;
cg_snippet_t *snippet;
/* Test modifying the fragment layer code */
pipeline = cg_pipeline_new(test_dev);
cg_pipeline_set_uniform_1f(pipeline,
cg_pipeline_get_uniform_location(pipeline,
"a_value"),
0.5);
snippet = cg_snippet_new(CG_SNIPPET_HOOK_LAYER_FRAGMENT,
"uniform float a_value;",
"frag.g = a_value;");
cg_pipeline_add_layer_snippet(pipeline, 0, snippet);
cg_object_unref(snippet);
cg_framebuffer_draw_textured_rectangle(test_fb,
pipeline,
120, 0, 130, 10,
0, 0, 0, 0);
cg_object_unref(pipeline);
test_cg_check_pixel(test_fb, 125, 5, 0xff80ffff);
}
static void
test_replace_fragment_layer(TestState *state)
{
cg_pipeline_t *pipeline;
cg_snippet_t *snippet;
/* Test replacing the fragment layer code */
pipeline = create_texture_pipeline(state);
snippet = cg_snippet_new(CG_SNIPPET_HOOK_LAYER_FRAGMENT, NULL, NULL);
cg_snippet_set_replace(snippet, "frag = vec4(0.0, 0.0, 1.0, 1.0);\n");
cg_pipeline_add_layer_snippet(pipeline, 0, snippet);
cg_object_unref(snippet);
/* Add a second layer which references the texture of the first
* layer. Even though the first layer is ignoring that layer's
* texture sample we should still be able to reference it in a
* another layer...
*/
snippet = cg_snippet_new(CG_SNIPPET_HOOK_LAYER_FRAGMENT, NULL, NULL);
cg_snippet_set_replace(snippet, "frag += cg_texel0;\n");
cg_pipeline_add_layer_snippet(pipeline, 1, snippet);
cg_object_unref(snippet);
cg_framebuffer_draw_textured_rectangle(test_fb,
pipeline,
110, 0, 120, 10,
0, 0, 0, 0);
cg_object_unref(pipeline);
test_cg_check_pixel(test_fb, 115, 5, 0xff00ffff);
}
static void
test_replace_snippet(TestState *state)
{
cg_pipeline_t *pipeline;
cg_snippet_t *snippet;
/* Test replacing a previous snippet */
pipeline = create_texture_pipeline(state);
snippet = cg_snippet_new(CG_SNIPPET_HOOK_FRAGMENT,
NULL,
"cg_color_out = vec4(0.5, 0.5, 0.5, 1.0);");
cg_pipeline_add_snippet(pipeline, snippet);
cg_object_unref(snippet);
snippet = cg_snippet_new(CG_SNIPPET_HOOK_FRAGMENT, NULL, NULL);
cg_snippet_set_pre(snippet, "cg_color_out = vec4(1.0, 1.0, 1.0, 1.0);");
cg_snippet_set_replace(snippet,
"cg_color_out *= vec4(1.0, 0.0, 0.0, 1.0);");
cg_pipeline_add_snippet(pipeline, snippet);
cg_object_unref(snippet);
cg_framebuffer_draw_textured_rectangle(test_fb,
pipeline,
100, 0, 110, 10,
0, 0, 0, 0);
cg_object_unref(pipeline);
test_cg_check_pixel(test_fb, 105, 5, 0xff0000ff);
}
static void
test_texture_lookup_hook(TestState *state)
{
cg_pipeline_t *pipeline;
cg_snippet_t *snippet;
/* Check the texture lookup hook */
snippet = cg_snippet_new(CG_SNIPPET_HOOK_TEXTURE_LOOKUP,
NULL,
"cg_texel.b += 1.0;");
/* Flip the texture coordinates around the y axis so that it will
* get the green texel.
*
* XXX: the - 0.1 to avoid sampling at the texture border since we aren't
* sure there won't be some inprecision in flipping the coordinate and we
* might sample the wrong texel with the default _REPEAT wrap mode.
*/
cg_snippet_set_pre(snippet, "cg_tex_coord.x =(1.0 - cg_tex_coord.x) - 0.1;");
pipeline = create_texture_pipeline(state);
cg_pipeline_add_layer_snippet(pipeline, 0, snippet);
cg_framebuffer_draw_textured_rectangle(test_fb,
pipeline,
80, 0, 90, 10,
0, 0, 0, 0);
cg_object_unref(pipeline);
cg_object_unref(snippet);
test_cg_check_pixel(test_fb, 85, 5, 0x00ffffff);
}
static void
test_replace_lookup_hook(TestState *state)
{
cg_pipeline_t *pipeline;
cg_snippet_t *snippet;
/* Check replacing the texture lookup hook */
snippet = cg_snippet_new(CG_SNIPPET_HOOK_TEXTURE_LOOKUP, NULL, NULL);
cg_snippet_set_replace(snippet, "cg_texel = vec4(0.0, 0.0, 1.0, 0.0);");
pipeline = create_texture_pipeline(state);
cg_pipeline_add_layer_snippet(pipeline, 0, snippet);
cg_framebuffer_draw_textured_rectangle(test_fb,
pipeline,
90, 0, 100, 10,
0, 0, 0, 0);
cg_object_unref(pipeline);
cg_object_unref(snippet);
test_cg_check_pixel(test_fb, 95, 5, 0x0000ffff);
}
static void
test_modify_vertex_layer(TestState *state)
{
cg_pipeline_t *pipeline;
cg_snippet_t *snippet;
/* Test modifying the vertex layer code */
pipeline = create_texture_pipeline(state);
snippet = cg_snippet_new(CG_SNIPPET_HOOK_TEXTURE_COORD_TRANSFORM,
NULL,
"cg_tex_coord.x = 1.0;");
cg_pipeline_add_layer_snippet(pipeline, 0, snippet);
cg_object_unref(snippet);
cg_framebuffer_draw_textured_rectangle(test_fb,
pipeline,
130, 0, 140, 10,
0, 1, 0, 1);
cg_object_unref(pipeline);
test_cg_check_pixel(test_fb, 135, 5, 0xffff00ff);
}
static void
test_replace_vertex_layer(TestState *state)
{
cg_pipeline_t *pipeline;
cg_snippet_t *snippet;
/* Test replacing the vertex layer code */
pipeline = create_texture_pipeline(state);
snippet = cg_snippet_new(CG_SNIPPET_HOOK_TEXTURE_COORD_TRANSFORM,
NULL,
NULL);
cg_snippet_set_replace(snippet, "cg_tex_coord.xy = vec2(1.0, 0.0);\n");
cg_pipeline_add_layer_snippet(pipeline, 0, snippet);
cg_object_unref(snippet);
cg_framebuffer_draw_textured_rectangle(test_fb,
pipeline,
140, 0, 150, 10,
1, 1, 1, 1);
cg_object_unref(pipeline);
test_cg_check_pixel(test_fb, 145, 5, 0x00ff00ff);
}
