tests/spec/arb_texture_stencil8/getteximage.c

   1 /*
   2  * Copyright © 2014 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  * \file getteximage.c
  26  *
  27  * Test glGetTexImage with stencil formats.
  28  */
  29
  30 #include "piglit-util-gl.h"
  31
  32 PIGLIT_GL_TEST_CONFIG_BEGIN
  33         config.supports_gl_compat_version = 12;
  34         config.window_visual = PIGLIT_GL_VISUAL_RGBA;
  35         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  36 PIGLIT_GL_TEST_CONFIG_END
  37
  38
  39 #define WIDTH 16
  40 #define HEIGHT 16
  41
  42 static bool
  43 test_s8(void)
  44 {
  45         GLubyte tex[WIDTH * HEIGHT];
  46         GLubyte buf[WIDTH * HEIGHT];
  47         GLuint i;
  48
  49         /* init tex data */
  50         for (i = 0; i < WIDTH * HEIGHT; i++) {
  51                 GLuint s = 255 - (i & 255);
  52                 tex[i] = s;
  53         }
  54
  55         /* create texture */
  56         glTexImage2D(GL_TEXTURE_2D, 0, GL_STENCIL_INDEX8,
  57                      WIDTH, HEIGHT, 0,
  58                      GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, tex);
  59         if (!piglit_check_gl_error(GL_NO_ERROR))
  60                 return false;
  61
  62         /* read back the texture */
  63         glGetTexImage(GL_TEXTURE_2D, 0,
  64                       GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, buf);
  65         if (!piglit_check_gl_error(GL_NO_ERROR))
  66                 return false;
  67
  68         /* compare */
  69         for (i = 0; i < WIDTH * HEIGHT; i++) {
  70                 if (buf[i] != tex[i]) {
  71                         printf("Wrong texel data at position %d: "
  72                                "Expected 0x%08x, found 0x%08x\n",
  73                                i, tex[i], buf[i]);
  74                         return false;
  75                 }
  76         }
  77
  78         return true;
  79 }
  80
  81 void
  82 piglit_init(int argc, char **argv)
  83 {
  84         bool pass;
  85
  86         piglit_require_extension("GL_ARB_texture_stencil8");
  87
  88         pass = test_s8();
  89
  90         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
  91 }
  92
  93
  94 enum piglit_result
  95 piglit_display(void)
  96 {
  97         /* unused */
  98         return PIGLIT_FAIL;
  99 }