eb14da3874
A first step towards abandoning the CoglObject type system: convert CoglFramebuffer, CoglOffscreen and CoglOnscreen into GObjects. CoglFramebuffer is turned into an abstract GObject, while the two others are currently final. The "winsys" and "platform" are still sprinkled 'void *' in the the non-abstract type instances however. https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1496
94 lines
3 KiB
C
94 lines
3 KiB
C
#include <cogl/cogl.h>
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#include <string.h>
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#include "test-declarations.h"
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#include "test-utils.h"
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void
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test_pipeline_shader_state (void)
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{
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CoglOffscreen *offscreen;
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CoglFramebuffer *fb;
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CoglPipeline *base_pipeline;
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CoglPipeline *draw_pipeline;
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CoglTexture2D *tex;
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CoglSnippet *snippet;
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float width = cogl_framebuffer_get_width (test_fb);
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float height = cogl_framebuffer_get_height (test_fb);
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cogl_framebuffer_orthographic (test_fb,
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0, 0, width, height,
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-1,
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100);
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tex = cogl_texture_2d_new_with_size (test_ctx, 128, 128);
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offscreen = cogl_offscreen_new_with_texture (tex);
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fb = COGL_FRAMEBUFFER (offscreen);
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cogl_framebuffer_clear4f (fb, COGL_BUFFER_BIT_COLOR, 0, 0, 0, 1);
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g_object_unref (offscreen);
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cogl_framebuffer_clear4f (test_fb, COGL_BUFFER_BIT_COLOR, 1, 1, 0, 1);
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/* Setup a template pipeline... */
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base_pipeline = cogl_pipeline_new (test_ctx);
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cogl_pipeline_set_layer_texture (base_pipeline, 1, tex);
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cogl_pipeline_set_color4f (base_pipeline, 1, 0, 0, 1);
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/* Derive a pipeline from the template, making a change that affects
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* fragment processing but making sure not to affect vertex
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* processing... */
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draw_pipeline = cogl_pipeline_copy (base_pipeline);
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snippet = cogl_snippet_new (COGL_SNIPPET_HOOK_FRAGMENT,
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NULL, /* declarations */
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"cogl_color_out = vec4 (0.0, 1.0, 0.1, 1.1);");
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cogl_pipeline_add_snippet (draw_pipeline, snippet);
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cogl_object_unref (snippet);
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cogl_framebuffer_draw_rectangle (test_fb, draw_pipeline,
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0, 0, width, height);
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cogl_object_unref (draw_pipeline);
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cogl_framebuffer_finish (test_fb);
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/* At this point we should have provoked cogl to cache some vertex
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* shader state for the draw_pipeline with the base_pipeline because
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* none of the changes made to the draw_pipeline affected vertex
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* processing. (NB: cogl will cache shader state with the oldest
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* ancestor that the state is still valid for to maximize the chance
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* that it can be used with other derived pipelines)
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*
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* Now we make a change to the base_pipeline to make sure that this
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* cached vertex shader gets invalidated.
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*/
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cogl_pipeline_set_layer_texture (base_pipeline, 0, tex);
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/* Now we derive another pipeline from base_pipeline to verify that
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* it doesn't end up re-using the old cached state
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*/
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draw_pipeline = cogl_pipeline_copy (base_pipeline);
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snippet = cogl_snippet_new (COGL_SNIPPET_HOOK_FRAGMENT,
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NULL, /* declarations */
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"cogl_color_out = vec4 (0.0, 0.0, 1.1, 1.1);");
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cogl_pipeline_add_snippet (draw_pipeline, snippet);
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cogl_object_unref (snippet);
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cogl_framebuffer_draw_rectangle (test_fb, draw_pipeline,
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0, 0, width, height);
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cogl_object_unref (draw_pipeline);
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test_utils_check_region (test_fb, 0, 0, width, height,
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0x0000ffff);
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}
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