1 /*
2 * Copyright © 2012 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
21 * DEALINGS IN THE SOFTWARE.
22 */
23
24 /** @file layout-std140-base-size-and-alignment.c
25 *
26 * Tests that glGetActiveUniformsiv() returns the correct offset for
27 * any basic type valid in std140, and for a float just following
28 * that, thus testing the size and base alignment for them.
29 */
30
31 #include "piglit-util-gl.h"
32 #include "uniform-types.h"
33
34 PIGLIT_GL_TEST_CONFIG_BEGIN
35
36 config.supports_gl_compat_version = 10;
37 config.supports_gl_core_version = 31;
38 config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
39 config.khr_no_error_support = PIGLIT_NO_ERRORS;
40
41 PIGLIT_GL_TEST_CONFIG_END
42
43 static int
align(int v,int a)44 align(int v, int a)
45 {
46 return (v + a - 1) & ~(a - 1);
47 }
48
49 static bool
test_format(const struct uniform_type * type,bool row_major)50 test_format(const struct uniform_type *type, bool row_major)
51 {
52 /* Using 140 to get unsigned ints. */
53 const char *fs_template =
54 "#version 140\n"
55 "layout(std140) uniform ubo {\n"
56 " float pad;\n"
57 " %s %s u;\n"
58 " float size_test;\n"
59 "};\n"
60 "\n"
61 "void main() {\n"
62 " gl_FragColor = vec4(pad) + vec4(%s) + vec4(size_test);\n"
63 "}\n";
64 char *fs_source;
65 GLuint prog;
66 const char *uniform_names[] = { "u", "size_test" };
67 GLuint uniform_indices[2];
68 GLint offsets[2];
69 int offset, size, expected_offset;
70 const struct uniform_type *transposed_type;
71 bool pass;
72 const char *deref;
73
74 if (row_major)
75 transposed_type = get_transposed_type(type);
76 else
77 transposed_type = type;
78
79 if (type->size == 4)
80 deref = "u";
81 else if (type->size <= 16)
82 deref = "u.x";
83 else
84 deref = "u[0].x";
85
86 (void)!asprintf(&fs_source, fs_template,
87 row_major && type->size > 16 ? "layout(row_major) " : "",
88 type->type,
89 deref);
90 prog = piglit_build_simple_program(NULL, fs_source);
91 free(fs_source);
92
93 glGetUniformIndices(prog, 2, uniform_names, uniform_indices);
94 glGetActiveUniformsiv(prog, 2, uniform_indices,
95 GL_UNIFORM_OFFSET, offsets);
96
97 glDeleteProgram(prog);
98
99 offset = offsets[0];
100 size = offsets[1] - offsets[0];
101
102 /* "pad" at the start of the UBO is a float, so our test
103 * uniform would start at byte 4 if not for alignment.
104 */
105 expected_offset = 4;
106 expected_offset = align(expected_offset, transposed_type->alignment);
107
108 pass = (offset == expected_offset &&
109 size == transposed_type->size);
110
111 printf("%-10s %10s %8d %-16d %8d %-16d%s\n",
112 type->type,
113 row_major ? "y" : "n",
114 offset,
115 expected_offset,
116 size,
117 transposed_type->size,
118 pass ? "" : " FAIL");
119
120 return pass;
121 }
122
123 void
piglit_init(int argc,char ** argv)124 piglit_init(int argc, char **argv)
125 {
126 bool pass = true;
127 unsigned int i;
128
129 piglit_require_extension("GL_ARB_uniform_buffer_object");
130 piglit_require_GLSL_version(140);
131
132 printf("%-10s %10s %8s %16s %8s %-16s\n",
133 "type", "row_major",
134 "offset", "expected offset", "size", "expected size");
135
136 for (i = 0; uniform_types[i].type; i++) {
137 pass = test_format(&uniform_types[i], false) && pass;
138 pass = test_format(&uniform_types[i], true) && pass;
139 }
140
141 piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
142 }
143
piglit_display(void)144 enum piglit_result piglit_display(void)
145 {
146 /* UNREACHED */
147 return PIGLIT_FAIL;
148 }
149