tests/spec/arb_copy_buffer/copybuffersubdata.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 GL_ARB_copy_buffer
  26  *
  27  * Brian Paul
  28  * Jan 2012
  29  */
  30
  31 #include "piglit-util-gl.h"
  32
  33 PIGLIT_GL_TEST_CONFIG_BEGIN
  34
  35         config.supports_gl_compat_version = 10;
  36
  37         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  38         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  39
  40 PIGLIT_GL_TEST_CONFIG_END
  41
  42 static bool
  43 test_copy(void)
  44 {
  45 #define BUF_SIZE 600  /* multiple of 100 */
  46
  47         GLuint bufs[2];
  48         char data[BUF_SIZE], *p;
  49         int i;
  50         int chunk = 100;
  51         bool pass = true;
  52
  53         assert(BUF_SIZE % chunk == 0);
  54
  55         glGenBuffers(2, bufs);
  56
  57         for (i = 0; i < BUF_SIZE; i++)
  58                 data[i] = rand() % 256;
  59
  60         glBindBufferARB(GL_COPY_READ_BUFFER, bufs[0]);
  61         glBufferData(GL_COPY_READ_BUFFER, BUF_SIZE, data, GL_STATIC_DRAW);
  62
  63         glBindBufferARB(GL_COPY_WRITE_BUFFER, bufs[1]);
  64         glBufferData(GL_COPY_WRITE_BUFFER, BUF_SIZE, NULL, GL_DYNAMIC_COPY);
  65
  66         /* copy from bufs[0] to bufs[1] in chunks */
  67         for (i = 0; i < BUF_SIZE / chunk; i++) {
  68                 int srcOffset = i * chunk;
  69                 int dstOffset = i * chunk;
  70                 glCopyBufferSubData(GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER,
  71                                     srcOffset, dstOffset, chunk);
  72         }
  73
  74         /* verify dest buffer */
  75         p = glMapBuffer(GL_COPY_WRITE_BUFFER, GL_READ_ONLY);
  76         for (i = 0; i < BUF_SIZE; i++) {
  77                 if (p[i] != data[i]) {
  78                         printf("expected %d, found %d at location %d\n",
  79                                data[i], p[i], i);
  80                         pass = false;
  81                         break;
  82                 }
  83         }
  84
  85         glUnmapBuffer(GL_COPY_WRITE_BUFFER);
  86
  87         glDeleteBuffers(2, bufs);
  88
  89         return pass;
  90 }
  91
  92
  93 enum piglit_result
  94 piglit_display(void)
  95 {
  96         /* should never get here */
  97         return PIGLIT_FAIL;
  98 }
  99
 100
 101 void
 102 piglit_init(int argc, char **argv)
 103 {
 104         piglit_require_extension("GL_ARB_copy_buffer");
 105
 106         if (test_copy())
 107                 piglit_report_result(PIGLIT_PASS);
 108         else
 109                 piglit_report_result(PIGLIT_FAIL);
 110 }