arb_copy_image: test copying of different mipmap levels of a texture
[piglit.git] / tests / fast_color_clear / blit-between-clears.c
blob56842da04e362218aa76dd3f98e777c14e97e010
1 /*
2 * Copyright © 2013 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
24 /**
25 * \file blit-between-clears.c
27 * Some implementations (i965/gen7+ in particular) contain logic to
28 * avoid performing a redundant fast color clear on a buffer that is
29 * already in the cleared state. This test verifies that blitting to
30 * a buffer takes it out of the cleared state, so a subsequent fast
31 * color clear will take effect.
34 #include "piglit-util-gl.h"
36 #define RB_WIDTH 512
37 #define RB_HEIGHT 512
39 PIGLIT_GL_TEST_CONFIG_BEGIN
40 config.supports_gl_compat_version = 11;
41 config.window_width = RB_WIDTH;
42 config.window_height = RB_HEIGHT;
43 config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
44 config.khr_no_error_support = PIGLIT_NO_ERRORS;
45 PIGLIT_GL_TEST_CONFIG_END
48 static GLuint fb;
51 void
52 piglit_init(int argc, char **argv)
54 GLuint rb;
55 GLenum fb_status;
57 /* Requirements */
58 piglit_require_extension("GL_ARB_framebuffer_object");
60 /* Set up framebuffer */
61 glGenFramebuffers(1, &fb);
62 glBindFramebuffer(GL_FRAMEBUFFER, fb);
63 glGenRenderbuffers(1, &rb);
64 glBindRenderbuffer(GL_RENDERBUFFER, rb);
65 glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA,
66 RB_WIDTH, RB_HEIGHT);
67 glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
68 GL_RENDERBUFFER, rb);
69 if (!piglit_check_gl_error(GL_NO_ERROR))
70 piglit_report_result(PIGLIT_FAIL);
71 fb_status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
72 if (fb_status != GL_FRAMEBUFFER_COMPLETE) {
73 printf("Framebuffer status: %s\n",
74 piglit_get_gl_enum_name(fb_status));
75 piglit_report_result(PIGLIT_FAIL);
80 enum piglit_result
81 piglit_display(void)
83 bool pass = true;
84 static const GLfloat green[] = { 0.0, 1.0, 0.0, 1.0 };
86 /* Fast clear the auxiliary framebuffer to red. */
87 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fb);
88 glClearColor(1, 0, 0, 1);
89 glClear(GL_COLOR_BUFFER_BIT);
91 /* Fast clear the window system framebuffer to green. */
92 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
93 glClearColor(0, 1, 0, 1);
94 glClear(GL_COLOR_BUFFER_BIT);
96 /* Blit the auxiliary framebuffer to the window system
97 * framebuffer, turning it red.
99 glBindFramebuffer(GL_READ_FRAMEBUFFER, fb);
100 glBlitFramebuffer(0, 0, RB_WIDTH, RB_HEIGHT,
101 0, 0, piglit_width, piglit_height,
102 GL_COLOR_BUFFER_BIT, GL_NEAREST);
104 /* Fast clear the window system framebuffer back to green. */
105 glClear(GL_COLOR_BUFFER_BIT);
107 /* Verify that the second clear actually took effect. */
108 glBindFramebuffer(GL_READ_FRAMEBUFFER, piglit_winsys_fbo);
109 pass = piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height,
110 green) && pass;
112 if (!piglit_check_gl_error(GL_NO_ERROR))
113 pass = false;
115 piglit_present_results();
116 return pass ? PIGLIT_PASS : PIGLIT_FAIL;