tests/spec/arb_uniform_buffer_object/getactiveuniformname.c

   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 getactiveuniformname.c
  25  *
  26  * From the GL_ARB_uniform_buffer_object spec:
  27  *
  28  *     "The name of an active uniform may be queried from the
  29  *      corresponding uniform index by calling
  30  *
  31  *          void GetActiveUniformName(uint program,
  32  *                                    uint uniformIndex,
  33  *                                   sizei bufSize,
  34  *                                   sizei* length,
  35  *                                   char* uniformName);
  36  *
  37  *
  38  *      The name of the uniform identified by <uniformIndex> is
  39  *      returned as a null-terminated string in <uniformName>.  The
  40  *      actual number of characters written into <uniformName>,
  41  *      excluding the null terminator, is returned in <length>. If
  42  *      <length> is NULL, no length is returned. The maximum number of
  43  *      characters that may be written into <uniformName>, including
  44  *      the null terminator, is specified by <bufSize>.  The returned
  45  *      uniform name can be the name of built-in uniform state as
  46  *      well. The complete list of built-in uniform state is described
  47  *      in section 7.5 of the OpenGL Shading Language
  48  *      specification. The length of the longest uniform name in
  49  *      <program> is given by the value of ACTIVE_UNIFORM_MAX_LENGTH,
  50  *      which can be queried with GetProgramiv.
  51  *
  52  *      ...
  53  *
  54  *
  55  *      The error INVALID_VALUE is generated by GetActiveUniformsiv,
  56  *      GetActiveUniformName, GetActiveUniformBlockiv,
  57  *      GetActiveUniformBlockName, and UniformBlockBinding if
  58  *      <program> is not a value generated by GL.
  59  *
  60  *      The error INVALID_VALUE is generated by GetActiveUniformName and
  61  *      GetActiveUniformBlockName if <bufSize> is less than zero.
  62  *
  63  *      The error INVALID_VALUE is generated by GetActiveUniformName if
  64  *      <uniformIndex> is greater than or equal to ACTIVE_UNIFORMS.
  65  */
  66
  67 #include "piglit-util-gl.h"
  68
  69 PIGLIT_GL_TEST_CONFIG_BEGIN
  70
  71         config.supports_gl_compat_version = 10;
  72         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  73         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  74
  75 PIGLIT_GL_TEST_CONFIG_END
  76
  77 void
  78 piglit_init(int argc, char **argv)
  79 {
  80         unsigned int i;
  81         GLuint prog;
  82         const char *source =
  83                 "#extension GL_ARB_uniform_buffer_object : enable\n"
  84                 "uniform ubo1 { float a; };\n"
  85                 "uniform ubo2 { float bb; float c; };\n"
  86                 "uniform float dddd;\n"
  87                 "void main() {\n"
  88                 "       gl_FragColor = vec4(a + bb + c + dddd);\n"
  89                 "}\n";
  90         int uniforms;
  91         bool pass = true;
  92         const char *names[4] = {"a", "bb", "c", "dddd"};
  93         bool found[4] = {false, false, false, false};
  94         char no_write;
  95         char fill_char = 0xd0;
  96
  97         piglit_require_extension("GL_ARB_uniform_buffer_object");
  98
  99         prog = piglit_build_simple_program(NULL, source);
 100
 101         glGetProgramiv(prog, GL_ACTIVE_UNIFORMS, &uniforms);
 102         assert(uniforms == 4);
 103
 104         for (i = 0; i < uniforms; i++) {
 105                 GLint written_strlen = 0;
 106                 GLint namelen = 9999;
 107                 char name[1000];
 108                 int name_index;
 109
 110                 /* This is the size including null terminator. */
 111                 glGetActiveUniformsiv(prog, 1, &i,
 112                                       GL_UNIFORM_NAME_LENGTH, &namelen);
 113
 114                 memset(name, 0xd0, sizeof(name));
 115                 glGetActiveUniformName(prog, i, sizeof(name),
 116                                        &written_strlen, name);
 117                 if (written_strlen >= sizeof(name) - 1) {
 118                         fprintf(stderr,
 119                                 "return strlen %d, longer than the buffer size\n",
 120                                 written_strlen);
 121                         pass = false;
 122                         continue;
 123                 } else if (name[written_strlen] != 0) {
 124                         fprintf(stderr, "return name[%d] was %d, expected 0\n",
 125                                 written_strlen, name[written_strlen]);
 126                         pass = false;
 127                         continue;
 128                 } else if (strlen(name) != written_strlen) {
 129                         fprintf(stderr, "return strlen was %d, but \"%s\" "
 130                                 "has strlen %d\n", written_strlen, name,
 131                                 (int)strlen(name));
 132                         pass = false;
 133                         continue;
 134                 }
 135
 136                 for (name_index = 0; name_index < ARRAY_SIZE(names); name_index++) {
 137                         if (strcmp(names[name_index], name) == 0) {
 138                                 if (found[name_index]) {
 139                                         fprintf(stderr,
 140                                                 "Uniform name \"%s\" "
 141                                                 "returned twice.\n", name);
 142                                         pass = false;
 143                                 }
 144                                 found[name_index] = true;
 145                                 break;
 146                         }
 147                 }
 148                 if (name_index == ARRAY_SIZE(names)) {
 149                         fprintf(stderr,
 150                                 "uniform \"%s\" is not a known name\n", name);
 151                         pass = false;
 152                         continue;
 153                 }
 154
 155                 if (namelen != written_strlen + 1) {
 156                         fprintf(stderr,
 157                                 "uniform \"%s\" had "
 158                                 "GL_UNIFORM_NAME_LENGTH %d, expected %d\n",
 159                                 name, namelen, written_strlen + 1);
 160                         pass = false;
 161                         continue;
 162                 }
 163
 164                 /* Test for overflow by writing to a bufSize equal to
 165                  * strlen and checking if a null terminator or
 166                  * something landed past that.
 167                  */
 168                 memset(name, fill_char, sizeof(name));
 169                 glGetActiveUniformName(prog, i, written_strlen, NULL, name);
 170                 if (name[written_strlen] != fill_char) {
 171                         fprintf(stderr, "glGetActiveUniformName overflowed: "
 172                                 "name[%d] = 0x%02x instead of 0x%02x\n",
 173                                 written_strlen, name[written_strlen],
 174                                 fill_char);
 175                         pass = false;
 176                 }
 177         }
 178
 179         if (!piglit_khr_no_error) {
 180                 no_write = fill_char;
 181                 glGetActiveUniformName(0xd0d0, 0, 1, NULL, &no_write);
 182                 pass = piglit_check_gl_error(GL_INVALID_VALUE) && pass;
 183                 if (no_write != fill_char)
 184                         pass = false;
 185
 186                 no_write = fill_char;
 187                 glGetActiveUniformName(prog, 0, -1, NULL, &no_write);
 188                 pass = piglit_check_gl_error(GL_INVALID_VALUE) && pass;
 189                 if (no_write != fill_char)
 190                         pass = false;
 191
 192                 no_write = fill_char;
 193                 glGetActiveUniformName(prog, uniforms, 1, NULL, &no_write);
 194                 pass = piglit_check_gl_error(GL_INVALID_VALUE) && pass;
 195                 if (no_write != fill_char)
 196                         pass = false;
 197         }
 198
 199         glDeleteProgram(prog);
 200
 201         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 202 }
 203
 204 enum piglit_result piglit_display(void)
 205 {
 206         /* UNREACHED */
 207         return PIGLIT_FAIL;
 208 }
 209