tests/spec/arb_copy_buffer/overlap.c

   1 /*
   2  * Copyright © 2012 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 overlap.c
  25  *
  26  * Tests the following piece of the GL_ARB_copy_buffer spec:
  27  *
  28  *     "An INVALID_VALUE error is generated if the same buffer object
  29  *      is bound to both readtarget and writetarget, and the ranges
  30  *      [readoffset, readoffset+size) and [writeoffset,
  31  *      writeoffset+size) overlap."
  32  *
  33  * And it also tests that copying works correctly if there isn't
  34  * overlap, but with one buffer being both src and dst.
  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         config.khr_no_error_support = PIGLIT_HAS_ERRORS;
  45
  46 PIGLIT_GL_TEST_CONFIG_END
  47
  48 static void
  49 test_copy(GLenum usage, int data_size, int src, int dst, int size)
  50 {
  51         uint8_t *data;
  52         uint8_t *expected;
  53         uint8_t *ptr;
  54         int i;
  55
  56         data = (uint8_t *)malloc(data_size);
  57         expected = (uint8_t *)malloc(data_size);
  58
  59         for (i = 0; i < data_size; i++) {
  60                 data[i] = i;
  61         }
  62
  63         glBufferData(GL_COPY_READ_BUFFER, data_size, data, usage);
  64
  65         glCopyBufferSubData(GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER,
  66                             src, dst, size);
  67
  68         if (src > dst - size &&
  69             src < dst + size) {
  70                 if (!piglit_check_gl_error(GL_INVALID_VALUE)) {
  71                         fprintf(stderr,
  72                                 "No error reported for overlapping "
  73                                 "glCopyBufferSubData() from %d to %d, "
  74                                 "size %d\n",
  75                                 src, dst, size);
  76                         piglit_report_result(PIGLIT_FAIL);
  77                 } else {
  78                         free(expected);
  79                         free(data);
  80                         return;
  81                 }
  82         } else {
  83                 if (!piglit_check_gl_error(0)) {
  84                         fprintf(stderr,
  85                                 "Error reported for non-overlapping "
  86                                 "glCopyBufferSubData() from %d to %d, "
  87                                 "size %d\n",
  88                                 src, dst, size);
  89                         piglit_report_result(PIGLIT_FAIL);
  90                 }
  91         }
  92         //piglit_reset_gl_error();
  93
  94         /* Now compute what the result should be and check that it matches. */
  95         memcpy(expected, data, data_size);
  96         memcpy(expected + dst, expected + src, size);
  97         ptr = glMapBuffer(GL_COPY_READ_BUFFER, GL_READ_ONLY);
  98         if (memcmp(expected, ptr, data_size)) {
  99                 fprintf(stderr,
 100                         "Data not copied correctly for non-overlapping "
 101                         "glCopyBufferSubData().\n"
 102                         "from offset %d to offset %d, size %d\n",
 103                         src, dst, size);
 104
 105                 fprintf(stderr, "original:  expected:  found:\n");
 106                 for (i = 0; i < data_size; i++) {
 107                         fprintf(stderr, "0x%02x       0x%02x       0x%02x\n",
 108                                 i, expected[i], ptr[i]);
 109                 }
 110                 piglit_report_result(PIGLIT_FAIL);
 111         }
 112         glUnmapBuffer(GL_COPY_READ_BUFFER);
 113
 114         free(expected);
 115         free(data);
 116 }
 117
 118 enum piglit_result
 119 piglit_display(void)
 120 {
 121         /* uncreached */
 122         return PIGLIT_FAIL;
 123 }
 124
 125 void
 126 piglit_init(int argc, char **argv)
 127 {
 128         GLuint buf;
 129         int src, dst, i;
 130         int size = 6;
 131         static const GLenum bo_modes[] = {
 132                 GL_STREAM_DRAW,
 133                 GL_STREAM_READ,
 134                 GL_STREAM_COPY,
 135                 GL_STATIC_DRAW,
 136                 GL_STATIC_READ,
 137                 GL_STATIC_COPY,
 138                 GL_DYNAMIC_DRAW,
 139                 GL_DYNAMIC_READ,
 140                 GL_DYNAMIC_COPY,
 141         };
 142
 143         piglit_require_extension("GL_ARB_copy_buffer");
 144
 145         glGenBuffers(1, &buf);
 146
 147         glBindBufferARB(GL_COPY_READ_BUFFER, buf);
 148         glBindBufferARB(GL_COPY_WRITE_BUFFER, buf);
 149
 150         for (i = 0; i < ARRAY_SIZE(bo_modes); i++) {
 151                 GLenum usage = bo_modes[i];
 152
 153                 for (src = 0; src < size; src++) {
 154                         int max_src_size = size - src;
 155                         for (dst = 0; dst < size; dst++) {
 156                                 int max_dst_size = size - dst;
 157                                 int max_size = ((max_src_size < max_dst_size) ?
 158                                                 max_src_size :
 159                                                 max_dst_size);
 160                                 int copy_size;
 161
 162                                 for (copy_size = 1; copy_size <= max_size;
 163                                      copy_size++) {
 164                                         test_copy(usage, size,
 165                                                   src, dst, copy_size);
 166                                 }
 167                         }
 168                 }
 169         }
 170
 171         glDeleteBuffers(1, &buf);
 172
 173         piglit_report_result(PIGLIT_PASS);
 174 }