1 /* Copyright © 2015 Ilia Mirkin
2 * Copyright © 2017 VMware, Inc.
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 /** @file indexed.c
25 *
26 * Tests that we can sample texture buffers with sampler indexing.
27 */
28
29 #include "piglit-util-gl.h"
30
31 PIGLIT_GL_TEST_CONFIG_BEGIN
32 config.supports_gl_core_version = 32;
33 config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
34 config.khr_no_error_support = PIGLIT_NO_ERRORS;
35 PIGLIT_GL_TEST_CONFIG_END
36
37 enum piglit_result
piglit_display(void)38 piglit_display(void)
39 {
40 static const float green[4] = {0, 1, 0, 0};
41 bool pass;
42
43 glViewport(0, 0, piglit_width, piglit_height);
44 glClearColor(0.2, 0.2, 0.2, 0.2);
45 glClear(GL_COLOR_BUFFER_BIT);
46
47 piglit_draw_rect(-1, -1, 2, 2);
48
49 pass = piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height, green);
50
51 piglit_present_results();
52
53 return pass ? PIGLIT_PASS : PIGLIT_FAIL;
54 }
55
56 void
piglit_init(int argc,char ** argv)57 piglit_init(int argc, char **argv)
58 {
59 static const char *vs_source =
60 "#version 150\n"
61 "in vec4 piglit_vertex;\n"
62 "void main()\n"
63 "{\n"
64 " gl_Position = piglit_vertex;\n"
65 "}\n";
66
67 static const char *fs_source =
68 "#version 150\n"
69 "#extension GL_ARB_gpu_shader5: require\n"
70 "uniform samplerBuffer s[2];\n"
71 "uniform int offset;\n"
72 "uniform int index = 1;\n"
73 "void main()\n"
74 "{\n"
75 " gl_FragColor = texelFetch(s[index], offset);\n"
76 "}\n";
77
78 GLuint tex[2], tbo[2];
79 GLint indices[2] = { 0, 1 };
80 static const uint8_t datag[4] = {0x00, 0xff, 0x00, 0x00};
81 static const uint8_t datar[4] = {0xff, 0x00, 0x00, 0x00};
82 GLuint prog;
83 GLint size = 4;
84 piglit_require_extension("GL_ARB_gpu_shader5");
85
86 prog = piglit_build_simple_program(vs_source, fs_source);
87 glUseProgram(prog);
88
89 glGenBuffers(2, tbo);
90 glGenTextures(2, tex);
91 glBindBuffer(GL_TEXTURE_BUFFER, tbo[0]);
92 glBindTexture(GL_TEXTURE_BUFFER, tex[0]);
93 glTexBuffer(GL_TEXTURE_BUFFER, GL_RGBA8, tbo[0]);
94 glBufferData(GL_TEXTURE_BUFFER,
95 size * sizeof(datar), NULL, GL_STATIC_READ);
96 glBufferSubData(GL_TEXTURE_BUFFER,
97 (size - 1) * sizeof(datar), sizeof(datar), datar);
98
99 glActiveTexture(GL_TEXTURE1);
100 glBindBuffer(GL_TEXTURE_BUFFER, tbo[1]);
101 glBindTexture(GL_TEXTURE_BUFFER, tex[1]);
102 glTexBuffer(GL_TEXTURE_BUFFER, GL_RGBA8, tbo[1]);
103 glBufferData(GL_TEXTURE_BUFFER,
104 size * sizeof(datag), NULL, GL_STATIC_READ);
105 glBufferSubData(GL_TEXTURE_BUFFER,
106 (size - 1) * sizeof(datag), sizeof(datag), datag);
107
108 glUniform1i(glGetUniformLocation(prog, "offset"), size - 1);
109 glUniform1iv(glGetUniformLocation(prog, "s"), 2, indices);
110 }
111