static CoglPipeline * create_pipeline_for_shader (TestState *state, const char *shader_source) { CoglPipeline *pipeline; CoglHandle shader; CoglHandle program; pipeline = cogl_pipeline_new (test_ctx); shader = cogl_create_shader (COGL_SHADER_TYPE_FRAGMENT); cogl_shader_source (shader, shader_source); program = cogl_create_program (); cogl_program_attach_shader (program, shader); cogl_pipeline_set_user_program (pipeline, program); cogl_handle_unref (shader); cogl_handle_unref (program); return pipeline; }
static void paint (TestState *state) { CoglPipeline *pipeline = cogl_pipeline_new (test_ctx); CoglTexture *tex; CoglColor color; CoglError *error = NULL; CoglHandle shader, program; cogl_color_init_from_4ub (&color, 0, 0, 0, 255); cogl_clear (&color, COGL_BUFFER_BIT_COLOR); /* Set the primary vertex color as red */ cogl_color_set_from_4ub (&color, 0xff, 0x00, 0x00, 0xff); cogl_pipeline_set_color (pipeline, &color); /* Override the vertex color in the texture environment with a constant green color provided by a texture */ tex = create_dummy_texture (); cogl_pipeline_set_layer_texture (pipeline, 0, tex); cogl_object_unref (tex); if (!cogl_pipeline_set_layer_combine (pipeline, 0, "RGBA=REPLACE(TEXTURE)", &error)) { g_warning ("Error setting layer combine: %s", error->message); g_assert_not_reached (); } /* Set up a dummy vertex shader that does nothing but the usual fixed function transform */ shader = cogl_create_shader (COGL_SHADER_TYPE_VERTEX); cogl_shader_source (shader, "void\n" "main ()\n" "{\n" " cogl_position_out = " "cogl_modelview_projection_matrix * " "cogl_position_in;\n" " cogl_color_out = cogl_color_in;\n" " cogl_tex_coord_out[0] = cogl_tex_coord_in;\n" "}\n"); cogl_shader_compile (shader); if (!cogl_shader_is_compiled (shader)) { char *log = cogl_shader_get_info_log (shader); g_warning ("Shader compilation failed:\n%s", log); g_free (log); g_assert_not_reached (); } program = cogl_create_program (); cogl_program_attach_shader (program, shader); cogl_program_link (program); cogl_handle_unref (shader); /* Draw something without the program */ cogl_set_source (pipeline); cogl_rectangle (0, 0, 50, 50); /* Draw it again using the program. It should look exactly the same */ cogl_pipeline_set_user_program (pipeline, program); cogl_handle_unref (program); cogl_rectangle (50, 0, 100, 50); cogl_pipeline_set_user_program (pipeline, COGL_INVALID_HANDLE); cogl_object_unref (pipeline); }