1 /*
2 * Copyright © 2018 Danylo Piliaiev
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 * Test that provoking vertex works as expected when part of the geometry
26 * is clipped when flat shading is enabled.
27 *
28 * https://bugs.freedesktop.org/show_bug.cgi?id=103047
29 */
30
31 #include "piglit-util-gl.h"
32
33 PIGLIT_GL_TEST_CONFIG_BEGIN
34 config.supports_gl_compat_version = 10;
35 config.khr_no_error_support = PIGLIT_NO_ERRORS;
36 PIGLIT_GL_TEST_CONFIG_END
37
38 void
piglit_init(int argc,char ** argv)39 piglit_init(int argc, char **argv)
40 {
41 piglit_require_extension("GL_EXT_provoking_vertex");
42 piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
43
44 glShadeModel(GL_FLAT);
45 }
46
47 enum piglit_result
piglit_display(void)48 piglit_display(void)
49 {
50 static const float red[3] = {1, 0, 0},
51 green[3] = {0, 1, 0},
52 blue[3] = {0, 0, 1},
53 yellow[3] = {1, 1, 0},
54 cyan[3] = {0, 1, 1};
55
56 bool pass = true;
57
58 glClear(GL_COLOR_BUFFER_BIT);
59 glProvokingVertexEXT(GL_LAST_VERTEX_CONVENTION_EXT);
60
61 const int y1 = piglit_height / 3;
62
63 glBegin(GL_TRIANGLE_STRIP);
64 glColor3fv(cyan);
65 glVertex3i(piglit_width + 1, y1, 0);
66 glColor3fv(yellow);
67 glVertex3i(piglit_width + 2, y1, 0);
68 glColor3fv(blue);
69 glVertex3i(piglit_width + 3, y1, 0);
70 glColor3fv(green);
71 glVertex3i(piglit_width / 2, y1 * 2, 0);
72 glColor3fv(red);
73 glVertex3i(piglit_width - 1, y1 * 2, 0);
74 glEnd();
75
76 pass = pass && piglit_probe_pixel_rgb(piglit_width - 2, y1 * 3 / 2, red);
77
78 piglit_present_results();
79
80 return pass ? PIGLIT_PASS : PIGLIT_FAIL;
81 }
82