1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/*
* (C) Copyright IBM Corporation 2004
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* \file stencil_wrap.c
*
* Simple test of GL_EXT_stencil_wrap functionality. Four squares are drawn
* with different stencil modes, but all should be rendered with the same
* final color.
*
* \author Ian Romanick <idr@us.ibm.com>
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_MAIN(
550 /*window_width*/,
200 /*window_height*/,
GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_STENCIL)
enum piglit_result
piglit_display(void)
{
GLint max_stencil;
GLint stencil_bits;
unsigned i;
GLboolean pass = GL_TRUE;
float expected[4] = {0.5, 0.5, 0.5, 0.5};
int w = piglit_width / (5 * 2 + 1);
int h = w;
int start_y = (piglit_height - h) / 2;
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
glGetIntegerv(GL_STENCIL_BITS, & stencil_bits);
max_stencil = (1U << stencil_bits) - 1;
printf("Stencil bits = %u, maximum stencil value = 0x%08x\n",
stencil_bits, max_stencil);
glClearStencil(0);
glClearColor(0.2, 0.2, 0.8, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT |
GL_STENCIL_BUFFER_BIT);
/* This is the "reference" square.
*/
glDisable(GL_STENCIL_TEST);
glColor3f(0.5, 0.5, 0.5);
piglit_draw_rect(w * 1, start_y, w, h);
glEnable(GL_STENCIL_TEST);
/* Draw the first two squares using the two non-wrap (i.e., saturate)
* modes.
*/
glStencilFunc(GL_ALWAYS, 0, ~0);
glStencilOp(GL_KEEP, GL_KEEP, GL_INCR);
glColor3f(0.9, 0.9, 0.9);
for (i = 0 ; i < (max_stencil + 5) ; i++) {
piglit_draw_rect(w * 3, start_y, w, h);
}
glStencilFunc(GL_EQUAL, max_stencil, ~0);
glColor3f(0.5, 0.5, 0.5);
piglit_draw_rect(w * 3, start_y, w, h);
glStencilFunc(GL_ALWAYS, 0, ~0);
glStencilOp(GL_KEEP, GL_KEEP, GL_DECR);
glColor3f(0.9, 0.9, 0.9);
for (i = 0 ; i < (max_stencil + 5) ; i++) {
piglit_draw_rect(w * 5, start_y, w, h);
}
glStencilFunc(GL_EQUAL, 0, ~0);
glColor3f(0.5, 0.5, 0.5);
piglit_draw_rect(w * 5, start_y, w, h);
/* Draw the last two squares using the two wrap modes.
*/
glStencilFunc(GL_ALWAYS, 0, ~0);
glStencilOp(GL_KEEP, GL_KEEP, GL_INCR_WRAP);
glColor3f(0.9, 0.9, 0.9);
for (i = 0 ; i < (max_stencil + 5) ; i++) {
piglit_draw_rect(w * 7, start_y, w, h);
}
glStencilFunc(GL_EQUAL, 4, ~0);
glColor3f(0.5, 0.5, 0.5);
piglit_draw_rect(w * 7, start_y, w, h);
glStencilFunc(GL_ALWAYS, 0, ~0);
glStencilOp(GL_KEEP, GL_KEEP, GL_DECR_WRAP);
glColor3f(0.9, 0.9, 0.9);
for (i = 0 ; i < 5 ; i++) {
piglit_draw_rect(w * 9, start_y, w, h);
}
glStencilFunc(GL_EQUAL, (max_stencil - 4), ~0);
glColor3f(0.5, 0.5, 0.5);
piglit_draw_rect(w * 9, start_y, w, h);
pass = piglit_probe_pixel_rgb(w * 1.5, piglit_height / 2, expected);
pass = piglit_probe_pixel_rgb(w * 3.5, piglit_height / 2, expected);
pass = piglit_probe_pixel_rgb(w * 5.5, piglit_height / 2, expected);
pass = piglit_probe_pixel_rgb(w * 7.5, piglit_height / 2, expected);
pass = piglit_probe_pixel_rgb(w * 9.5, piglit_height / 2, expected);
glutSwapBuffers();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
if (!piglit_is_extension_supported("GL_EXT_stencil_wrap") && piglit_get_gl_version() < 14) {
printf("Sorry, this program requires either "
"GL_EXT_stencil_wrap or OpenGL 1.4.\n");
piglit_report_result(PIGLIT_SKIP);
}
printf("\nAll 5 squares should be the same color.\n");
glEnable(GL_BLEND);
}
|
