tests/texturing/generatemipmap-base-change.c

   1 /*
   2  * Copyright 2016 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 /**
  25  * Test that glGenerateMipmap works properly (doesn't crash) when called a
  26  * second time on a texture after we change the base image's size or format.
  27  *
  28  * The command line takes two parameters:
  29  *   size   - test base level size change
  30  *   format - test base level format change
  31  */
  32
  33
  34 #include "piglit-util-gl.h"
  35
  36 PIGLIT_GL_TEST_CONFIG_BEGIN
  37         config.supports_gl_compat_version = 10;
  38         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  39         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  40 PIGLIT_GL_TEST_CONFIG_END
  41
  42
  43 void
  44 piglit_init(int argc, char **argv)
  45 {
  46 #define MAX_SIZE 8
  47         GLubyte img[MAX_SIZE * MAX_SIZE * 4];
  48         bool change_size = false, change_format = false;
  49         int i;
  50         GLuint tex;
  51         GLsizei base_size, w0 = 0, h0 = 0;
  52         bool pass = true;
  53
  54         /* We require GL 3.0 or GL_EXT_framebuffer_object */
  55         if (piglit_get_gl_version() < 30 &&
  56                 !piglit_is_extension_supported("GL_EXT_framebuffer_object")) {
  57                 piglit_report_result(PIGLIT_SKIP);
  58         }
  59
  60         /* parse args */
  61         for (i = 1; i < argc; i++) {
  62                 if (strcmp(argv[i], "size") == 0) {
  63                         change_size = true;
  64                 } else if (strcmp(argv[i], "format") == 0) {
  65                         change_format = true;
  66                 }
  67         }
  68
  69         if (!change_size && !change_format) {
  70                 printf("Missing required argument: 'size' or 'format'\n");
  71                 piglit_report_result(PIGLIT_SKIP);
  72         }
  73
  74         /* init image data */
  75         for (i = 0; i < sizeof(img); i++)
  76                 img[i] = 128;
  77
  78
  79         glGenTextures(1, &tex);
  80         glBindTexture(GL_TEXTURE_2D, tex);
  81
  82         // Create initial texture mipmap (base_size x base_size)
  83         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  84         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  85         base_size = change_size ? MAX_SIZE / 2 : MAX_SIZE;
  86         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, base_size, base_size, 0,
  87                      GL_RGBA, GL_UNSIGNED_BYTE, img);
  88         glGenerateMipmap(GL_TEXTURE_2D);
  89
  90         if (change_format) {
  91                 /* Change format of first level */
  92                 glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, base_size, base_size,
  93                              0, GL_RGBA, GL_UNSIGNED_BYTE, img);
  94         }
  95         else if (change_size) {
  96                 /* Change base level to be larger */
  97                 assert(base_size * 2 == MAX_SIZE);
  98                 base_size = MAX_SIZE;
  99                 glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, base_size, base_size,
 100                              0, GL_RGBA, GL_UNSIGNED_BYTE, img);
 101         }
 102
 103         /* See if mipmap generation works (may crash/assert in Mesa) */
 104         glGenerateMipmap(GL_TEXTURE_2D);
 105
 106         /* check level sizes */
 107         for (i = 0; i < 3; i++) {
 108                 GLint w, h;
 109                 glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_WIDTH, &w);
 110                 glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_HEIGHT, &h);
 111                 if (i == 0) {
 112                         w0 = w;
 113                         h0 = h;
 114                 }
 115                 else {
 116                         if (w != w0 >> i || h != h0 >> i) {
 117                                 printf("Incorrect mipmap level size: level %d", i);
 118                                 printf(" Found %d x %d, expected %d x %d\n", w, h,
 119                                        w0 >> i , h0 >> i);
 120                                 pass = false;
 121                         }
 122                 }
 123         }
 124
 125         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 126 }
 127
 128
 129 enum piglit_result
 130 piglit_display(void)
 131 {
 132         // no-op
 133         return PIGLIT_PASS;
 134 }