tests/spec/arb_clear_texture/clear-max-level.c

   1 /*
   2  * Copyright (c) 2015 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 clear-max-level.c
  25  *
  26  * Exercise an nvidia driver bug where clearing a texture mipmap level
  27  * fails if the level is >= GL_TEXTURE_MAX_LEVEL.
  28  *
  29  * BTW, glCopyImageSubData() seems to also fail if the src/dest mipmap level
  30  * is >= GL_TEXTURE_MAX_LEVEL.
  31  */
  32
  33 #include "piglit-util-gl.h"
  34
  35 PIGLIT_GL_TEST_CONFIG_BEGIN
  36         config.supports_gl_compat_version = 14;
  37         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  38         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  39 PIGLIT_GL_TEST_CONFIG_END
  40
  41
  42 static bool
  43 test_clear(GLint maxLevel)
  44 {
  45         const GLenum target = GL_TEXTURE_2D;
  46         const int width = 32, height = 32, numLevels = 3;
  47         const GLenum texInternalFormat = GL_RGBA8;
  48         GLfloat *texData;
  49         int i, l;
  50         bool pass = true;
  51         GLuint tex;
  52
  53         /* Create texture */
  54         glGenTextures(1, &tex);
  55         glBindTexture(target, tex);
  56         glTexStorage2D(target,
  57                        numLevels,
  58                        texInternalFormat,
  59                        width,
  60                        height);
  61         if (!piglit_check_gl_error(GL_NO_ERROR))
  62                 return false;
  63
  64         glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  65         glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  66         glTexParameteri(target, GL_TEXTURE_BASE_LEVEL, 0);
  67         glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevel);
  68
  69         /* clear levels to unique values */
  70         for (l = 0; l < numLevels; ++l) {
  71                 GLfloat value[4];
  72                 value[0] = value[1] = value[2] = value[3] = l * 0.125;
  73                 glClearTexImage(tex, l, GL_RGBA, GL_FLOAT, value);
  74                 if (!piglit_check_gl_error(GL_NO_ERROR))
  75                         return false;
  76         }
  77
  78         /* check results */
  79         texData = malloc(width * height * 4 * sizeof(GLfloat));
  80
  81         for (l = 0; l < numLevels; l++) {
  82                 float expected = l * 0.125;
  83                 float w = MAX2(1, width >> l);
  84                 float h = MAX2(1, width >> l);
  85                 glPixelStorei(GL_PACK_ALIGNMENT, 1);
  86                 glGetTexImage(target, l, GL_RGBA, GL_FLOAT, texData);
  87                 if (!piglit_check_gl_error(GL_NO_ERROR))
  88                         return false;
  89                 for (i = 0; i < 4 * w * h; i++) {
  90                         if (fabsf(texData[i] - expected) > 0.01) {
  91                                 printf("Failure:\n");
  92                                 printf("\tmipmap level %d, pixel %d\n",
  93                                        l, i / 4);
  94                                 printf("\tGL_TEXTURE_MAX_LEVEL %d\n", maxLevel);
  95                                 printf("\texpected value %g, found %g\n",
  96                                        expected, texData[i]);
  97                                 pass = false;
  98                                 break;
  99                         }
 100                 }
 101         }
 102
 103         free(texData);
 104         glDeleteTextures(1, &tex);
 105
 106         return pass;
 107 }
 108
 109
 110 void
 111 piglit_init(int argc, char **argv)
 112 {
 113         bool pass = true;
 114
 115         piglit_require_extension("GL_ARB_texture_storage");
 116         piglit_require_extension("GL_ARB_clear_texture");
 117
 118         pass = test_clear(0) && pass;
 119         pass = test_clear(1) && pass;
 120         pass = test_clear(2) && pass;
 121
 122         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 123 }
 124
 125
 126 enum piglit_result
 127 piglit_display(void)
 128 {
 129         /* unused */
 130         return PIGLIT_FAIL;
 131 }