tests/spec/ext_packed_depth_stencil/texsubimage.c

   1 /*
   2  * Copyright (c) 2014 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 DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 /** @file texsubimage.c
  25  *
  26  * A test of using glTexSubImage2D to update a region of a
  27  * depth-stencil texture. A 4x4 depth-stencil is created and then two
  28  * of the texels are set using different values. The whole texture is
  29  * read back using glGetTexImage and compared to the expected values.
  30  */
  31
  32 #include "piglit-util-gl.h"
  33
  34 PIGLIT_GL_TEST_CONFIG_BEGIN
  35
  36         config.supports_gl_compat_version = 13;
  37
  38         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  39         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  40
  41 PIGLIT_GL_TEST_CONFIG_END
  42
  43 static GLuint
  44 create_texture(void)
  45 {
  46         static const GLubyte data[] = {
  47                 0xff, 0xff, 0xff, 0xff,
  48                 0x04, 0x05, 0x06, 0x07,
  49                 0xff, 0xff, 0xff, 0xff,
  50                 0x0c, 0x0d, 0x0e, 0x0f,
  51         };
  52         GLuint tex;
  53
  54         glGenTextures(1, &tex);
  55         glBindTexture(GL_TEXTURE_2D, tex);
  56         glTexImage2D(GL_TEXTURE_2D,
  57                      0, /* level */
  58                      GL_DEPTH24_STENCIL8_EXT,
  59                      2, 2, /* width/height */
  60                      0, /* border */
  61                      GL_DEPTH_STENCIL_EXT,
  62                      GL_UNSIGNED_INT_24_8_EXT,
  63                      data);
  64
  65         return tex;
  66 }
  67
  68 static void
  69 update_texture(void)
  70 {
  71         static const GLubyte bottom_left_pixel[] = {
  72                 0x00, 0x01, 0x02, 0x03
  73         };
  74         static const GLubyte top_left_pixel[] = {
  75                 0x08, 0x09, 0x0a, 0x0b
  76         };
  77         glTexSubImage2D(GL_TEXTURE_2D,
  78                         0, /* level */
  79                         0, 0, /* x/y */
  80                         1, 1, /* width/height */
  81                         GL_DEPTH_STENCIL_EXT,
  82                         GL_UNSIGNED_INT_24_8_EXT,
  83                         bottom_left_pixel);
  84         glTexSubImage2D(GL_TEXTURE_2D,
  85                         0, /* level */
  86                         0, 1, /* x/y */
  87                         1, 1, /* width/height */
  88                         GL_DEPTH_STENCIL_EXT,
  89                         GL_UNSIGNED_INT_24_8_EXT,
  90                         top_left_pixel);
  91 }
  92
  93 static bool
  94 check_texels(void)
  95 {
  96         GLubyte texels[2 * 2 * 4];
  97         int i;
  98
  99         glGetTexImage(GL_TEXTURE_2D,
 100                       0, /* level */
 101                       GL_DEPTH_STENCIL_EXT,
 102                       GL_UNSIGNED_INT_24_8_EXT,
 103                       texels);
 104
 105         for (i = 0; i < sizeof texels; i++)
 106                 if (texels[i] != i)
 107                         return false;
 108
 109         return true;
 110 }
 111
 112 void
 113 piglit_init(int argc, char **argv)
 114 {
 115         GLuint tex;
 116         bool pass;
 117
 118         /* We can create depth/stencil textures if either:
 119          * 1. We have GL 3.0 or later
 120          * 2. We have GL_EXT_packed_depth_stencil and GL_ARB_depth_texture
 121          */
 122         if (piglit_get_gl_version() < 30
 123             && !(piglit_is_extension_supported("GL_EXT_packed_depth_stencil") &&
 124                  piglit_is_extension_supported("GL_ARB_depth_texture"))) {
 125                 printf("OpenGL 3.0 or GL_EXT_packed_depth_stencil + "
 126                        "GL_ARB_depth_texture is required.\n");
 127                 piglit_report_result(PIGLIT_SKIP);
 128         }
 129
 130         tex = create_texture();
 131
 132         if (!piglit_check_gl_error(GL_NO_ERROR))
 133                 piglit_report_result(PIGLIT_FAIL);
 134
 135         update_texture();
 136
 137         if (!piglit_check_gl_error(GL_NO_ERROR))
 138                 piglit_report_result(PIGLIT_FAIL);
 139
 140         glBindTexture(GL_TEXTURE_2D, tex);
 141
 142         pass = check_texels();
 143
 144         glBindTexture(GL_TEXTURE_2D, 0);
 145
 146         glDeleteTextures(1, &tex);
 147
 148         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 149 }
 150
 151 enum piglit_result
 152 piglit_display(void)
 153 {
 154         /* unused */
 155         return PIGLIT_FAIL;
 156 }