tests/spec/arb_texture_view/mipgen.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  * Verifies that mipmap generation uses the right format (from view,
  26  * not what was originally specified).
  27  */
  28
  29 #include "piglit-util-gl.h"
  30 #include "common.h"
  31
  32 PIGLIT_GL_TEST_CONFIG_BEGIN
  33
  34         config.supports_gl_compat_version = 20;
  35
  36         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  37
  38         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  39
  40 PIGLIT_GL_TEST_CONFIG_END
  41
  42 /**
  43  * Create view with different view format and generate mipmap.
  44  */
  45 static bool
  46 test_mipgen(void)
  47 {
  48         GLuint tex, new_tex;
  49         GLint width = 4, height = 4, levels = 2;
  50         bool pass = true;
  51
  52         glGenTextures(1, &tex);
  53         glBindTexture(GL_TEXTURE_2D, tex);
  54
  55         glTexStorage2D(GL_TEXTURE_2D, levels, GL_R8, width, height);
  56
  57         /* averaging these as snorm values should give 0 */
  58         GLubyte buf[4][4] =
  59                 {{0xFF, 0x01, 0xFF, 0x01},
  60                  {0xFF, 0x01, 0xFF, 0x01},
  61                  {0xFF, 0x01, 0xFF, 0x01},
  62                  {0xFF, 0x01, 0xFF, 0x01}};
  63         GLbyte res[4];
  64
  65         glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height,
  66                         GL_RED, GL_UNSIGNED_BYTE, buf);
  67
  68         glGenTextures(1, &new_tex);
  69
  70         glTextureView(new_tex, GL_TEXTURE_2D, tex,  GL_R8_SNORM, 0, 2, 0, 1);
  71         glBindTexture(GL_TEXTURE_2D, new_tex);
  72         glGenerateMipmap(GL_TEXTURE_2D);
  73         glPixelStorei(GL_PACK_ALIGNMENT, 1);
  74         glGetTexImage(GL_TEXTURE_2D, 1, GL_RED, GL_BYTE, &res);
  75         pass = !res[0] && !res[1] && !res[2] && !res[3];
  76
  77         if (!pass) {
  78                 printf("expected 0, got %d %d %d %d\n",
  79                        res[0], res[1], res[2], res[3]);
  80         }
  81
  82         glDeleteTextures(1, &new_tex);
  83         glDeleteTextures(1, &tex);
  84
  85         return pass;
  86 }
  87
  88 enum piglit_result
  89 piglit_display(void)
  90 {
  91        return PIGLIT_FAIL;
  92 }
  93
  94 void
  95 piglit_init(int argc, char **argv)
  96 {
  97         bool pass = true;
  98
  99         piglit_require_extension("GL_ARB_texture_storage");
 100         piglit_require_extension("GL_ARB_texture_view");
 101
 102         pass = test_mipgen() && piglit_check_gl_error(GL_NO_ERROR);
 103         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 104 }