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#include <cogl/cogl.h>
#include <string.h>
#include "test-utils.h"
void
test_pipeline_shader_state (void)
{
CoglOffscreen *offscreen;
CoglFramebuffer *fb;
CoglPipeline *base_pipeline;
CoglPipeline *draw_pipeline;
CoglTexture2D *tex;
CoglSnippet *snippet;
float width = cogl_framebuffer_get_width (test_fb);
float height = cogl_framebuffer_get_height (test_fb);
cogl_framebuffer_orthographic (test_fb,
0, 0, width, height,
-1,
100);
tex = cogl_texture_2d_new_with_size (test_ctx,
128, 128, COGL_PIXEL_FORMAT_ANY);
offscreen = cogl_offscreen_new_with_texture (COGL_TEXTURE (tex));
fb = COGL_FRAMEBUFFER (offscreen);
cogl_framebuffer_clear4f (fb, COGL_BUFFER_BIT_COLOR, 0, 0, 0, 1);
cogl_object_unref (offscreen);
cogl_framebuffer_clear4f (test_fb, COGL_BUFFER_BIT_COLOR, 1, 1, 0, 1);
/* Setup a template pipeline... */
base_pipeline = cogl_pipeline_new (test_ctx);
cogl_pipeline_set_layer_texture (base_pipeline, 1, COGL_TEXTURE (tex));
cogl_pipeline_set_color4f (base_pipeline, 1, 0, 0, 1);
/* Derive a pipeline from the template, making a change that affects
* fragment processing but making sure not to affect vertex
* processing... */
draw_pipeline = cogl_pipeline_copy (base_pipeline);
snippet = cogl_snippet_new (COGL_SNIPPET_HOOK_FRAGMENT,
NULL, /* declarations */
"cogl_color_out = vec4 (0.0, 1.0, 0.1, 1.1);");
cogl_pipeline_add_snippet (draw_pipeline, snippet);
cogl_object_unref (snippet);
cogl_framebuffer_draw_rectangle (test_fb, draw_pipeline,
0, 0, width, height);
cogl_object_unref (draw_pipeline);
cogl_framebuffer_finish (test_fb);
/* At this point we should have provoked cogl to cache some vertex
* shader state for the draw_pipeline with the base_pipeline because
* none of the changes made to the draw_pipeline affected vertex
* processing. (NB: cogl will cache shader state with the oldest
* ancestor that the state is still valid for to maximize the chance
* that it can be used with other derived pipelines)
*
* Now we make a change to the base_pipeline to make sure that this
* cached vertex shader gets invalidated.
*/
cogl_pipeline_set_layer_texture (base_pipeline, 0, COGL_TEXTURE (tex));
/* Now we derive another pipeline from base_pipeline to verify that
* it doesn't end up re-using the old cached state
*/
draw_pipeline = cogl_pipeline_copy (base_pipeline);
snippet = cogl_snippet_new (COGL_SNIPPET_HOOK_FRAGMENT,
NULL, /* declarations */
"cogl_color_out = vec4 (0.0, 0.0, 1.1, 1.1);");
cogl_pipeline_add_snippet (draw_pipeline, snippet);
cogl_object_unref (snippet);
cogl_framebuffer_draw_rectangle (test_fb, draw_pipeline,
0, 0, width, height);
cogl_object_unref (draw_pipeline);
test_utils_check_region (test_fb, 0, 0, width, height,
0x0000ffff);
}
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