1 /*
2 * Copyright © 2013 Intel Corporation
3 *
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:
10 *
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.
14 *
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 DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24 /**
25 * \file clear.c
26 * Verify that glClear uses the scissor rectangle from viewport 0.
27 */
28
29 #include "piglit-util-gl.h"
30
31 PIGLIT_GL_TEST_CONFIG_BEGIN
32
33 config.supports_gl_compat_version = 10;
34 config.supports_gl_core_version = 31;
35 config.supports_gl_es_version = 31;
36
37 config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
38 config.khr_no_error_support = PIGLIT_NO_ERRORS;
39
40 PIGLIT_GL_TEST_CONFIG_END
41
42 static GLint num_viewports;
43
44 void
piglit_init(int argc,char ** argv)45 piglit_init(int argc, char **argv)
46 {
47 #ifdef PIGLIT_USE_OPENGL
48 piglit_require_extension("GL_ARB_viewport_array");
49 #else
50 piglit_require_extension("GL_OES_viewport_array");
51 #endif
52 glGetIntegerv(GL_MAX_VIEWPORTS, &num_viewports);
53 }
54
55 enum piglit_result
piglit_display(void)56 piglit_display(void)
57 {
58 static const float expected[] = {
59 0.0f, 1.0f, 0.0f, 1.0f
60 };
61
62 const int slice_height = (piglit_height + num_viewports - 2)
63 / (num_viewports - 1);
64
65 bool pass = false;
66 int i;
67
68 glDisable(GL_SCISSOR_TEST);
69 glClearColor(0.0, 0.0, 0.0, 0.0);
70 glClear(GL_COLOR_BUFFER_BIT);
71
72 glScissorIndexed(0, 0, 0, piglit_width, piglit_height);
73 glEnablei(GL_SCISSOR_TEST, 0);
74
75 for (i = 1; i < num_viewports; i++) {
76 glEnablei(GL_SCISSOR_TEST, i);
77 glScissorIndexed(i,
78 0, i * slice_height,
79 piglit_width, slice_height);
80 }
81
82 glClearColor(0.0, 1.0, 0.0, 1.0);
83 glClear(GL_COLOR_BUFFER_BIT);
84
85 pass = piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height,
86 expected);
87
88 piglit_present_results();
89 return pass ? PIGLIT_PASS : PIGLIT_FAIL;
90 }
91