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
157
158
159
160
161
162
163
164
165
|
/*
* Copyright © 2009 Intel Corporation
*
* 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
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*
* Authors:
* Robert Bragg <robert@sixbynine.org>
* Eric Anholt <eric@anholt.net>
*
*/
/** @file fbo-generatemipmap-swizzle.c
*
* Tests that glGenerateMipmapEXT works correctly on a 2D texture with a
* swizzle set via ARB_texture_swizzle
*
* Compare this test to fbo-generatemipmap.c.
*/
#include "piglit-util-gl-common.h"
#define TEX_WIDTH 256
#define TEX_HEIGHT 256
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 10;
config.window_width = 700;
config.window_height = 300;
config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGB;
PIGLIT_GL_TEST_CONFIG_END
static const float red[] = {1, 0, 0, 0};
static const float green[] = {0, 1, 0, 0};
static const GLint swizzle[4] = { GL_ZERO, GL_RED, GL_ZERO, GL_ZERO };
static GLuint
create_fbo(void)
{
GLuint tex, fb;
GLenum status;
int i, dim;
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_RGBA, swizzle);
for (i = 0, dim = TEX_WIDTH; dim >0; i++, dim /= 2) {
glTexImage2D(GL_TEXTURE_2D, i, GL_RED,
dim, dim,
0,
GL_RED, GL_UNSIGNED_BYTE, NULL);
}
assert(glGetError() == 0);
glGenFramebuffersEXT(1, &fb);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D,
tex,
0);
assert(glGetError() == 0);
status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
fprintf(stderr, "FBO incomplete\n");
goto done;
}
glViewport(0, 0, TEX_WIDTH, TEX_HEIGHT);
piglit_ortho_projection(TEX_WIDTH, TEX_HEIGHT, GL_FALSE);
glColor4fv(red);
piglit_draw_rect(0, 0, TEX_WIDTH, TEX_HEIGHT);
glGenerateMipmapEXT(GL_TEXTURE_2D);
done:
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
glDeleteFramebuffersEXT(1, &fb);
return tex;
}
static void
draw_mipmap(int x, int y, int dim)
{
glViewport(0, 0, piglit_width, piglit_height);
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
glEnable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
piglit_draw_rect_tex(x, y, dim, dim,
0, 0, 1, 1);
}
static GLboolean
test_mipmap_drawing(int start_x, int start_y, int dim)
{
return piglit_probe_rect_rgb(start_x, start_y, dim, dim, green);
}
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
int dim;
GLuint tex;
int x;
glClearColor(0.5, 0.5, 0.5, 0.5);
glClear(GL_COLOR_BUFFER_BIT);
tex = create_fbo();
x = 1;
for (dim = TEX_WIDTH; dim > 1; dim /= 2) {
draw_mipmap(x, 1, dim);
x += dim + 1;
}
x = 1;
for (dim = TEX_WIDTH; dim > 1; dim /= 2) {
pass &= test_mipmap_drawing(x, 1, dim);
x += dim + 1;
}
glDeleteTextures(1, &tex);
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void piglit_init(int argc, char **argv)
{
piglit_require_extension("GL_EXT_framebuffer_object");
piglit_require_extension("GL_ARB_texture_swizzle");
piglit_require_extension("GL_ARB_texture_rg");
}
|
