tests/security/initialized-vbo.c

   1 /*
   2  * Copyright © 2012 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 VBO memory is initialized to a constant value and not stale
  26  * data that may show previous contents of VRAM.
  27  *
  28  * To pass this test an OpenGL implementation should initialize the
  29  * contents of the new buffer to some fixed value (like all zeros).
  30  * But since that's not spec'd by OpenGL, we only return WARN instead of
  31  * FAIL if that's not the case.
  32  *
  33  * Brian Paul
  34  * June 2012
  35  */
  36
  37 #include "piglit-util-gl.h"
  38
  39 PIGLIT_GL_TEST_CONFIG_BEGIN
  40
  41         config.supports_gl_compat_version = 10;
  42
  43         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  44
  45 PIGLIT_GL_TEST_CONFIG_END
  46
  47
  48 enum piglit_result
  49 piglit_display(void)
  50 {
  51         GLsizei size = 10 * 1000 * 1000;
  52         GLuint buf;
  53         GLubyte *tmp = malloc(size);
  54         int i;
  55         bool pass = true;
  56
  57         glGenBuffers(1, &buf);
  58         glBindBuffer(GL_ARRAY_BUFFER, buf);
  59         glBufferData(GL_ARRAY_BUFFER, size, NULL, GL_STATIC_DRAW);
  60
  61         glGetBufferSubData(GL_ARRAY_BUFFER, 0, size, tmp);
  62
  63         /* check if all same values */
  64         for (i = 1; i < size; i++) {
  65                 if (tmp[i] != tmp[0]) {
  66                         pass = false;
  67                         break;
  68                 }
  69         }
  70
  71         glDeleteBuffers(1, &buf);
  72
  73         free(tmp);
  74         return pass ? PIGLIT_PASS : PIGLIT_WARN;
  75 }
  76
  77
  78 void
  79 piglit_init(int argc, char **argv)
  80 {
  81         piglit_require_extension("GL_ARB_vertex_buffer_object");
  82 }