tests/spec/arb_clear_buffer_object/common.c

   1 /*
   2  * Copyright © 2014 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 /**
  25  * \file common.c
  26  *
  27  * Common routines to fill or check array buffer data.
  28  */
  29
  30 #include "piglit-util-gl.h"
  31
  32 /* Check that the range of ARRAY_BUFFER specified with <ofs> and <length>
  33  * is filled with chunks of data of length <expected_data_size>.
  34  */
  35 bool
  36 check_array_buffer_sub_data(const int ofs, const int length,
  37                 const int expected_data_size, const void *const expected_data)
  38 {
  39         bool pass = true;
  40         int i;
  41         int buffer_size;
  42         char *buffer_data = glMapBuffer(GL_ARRAY_BUFFER, GL_READ_ONLY);
  43         glGetBufferParameteriv(GL_ARRAY_BUFFER, GL_BUFFER_SIZE, &buffer_size);
  44
  45         assert(length % expected_data_size == 0);
  46
  47         assert(ofs >= 0);
  48         assert(length >= 0);
  49         assert(ofs + length <= buffer_size);
  50
  51         for (i = ofs; i < ofs + length; i += expected_data_size) {
  52                 pass = memcmp(buffer_data + i, expected_data,
  53                                 expected_data_size) == 0 && pass;
  54         }
  55
  56         glUnmapBuffer(GL_ARRAY_BUFFER);
  57
  58         return pass;
  59 }
  60
  61
  62 /* As above, but for entire buffer. */
  63 bool
  64 check_array_buffer_data(const int expected_data_size,
  65                 const void *const expected_data)
  66 {
  67         int buffer_size;
  68         glGetBufferParameteriv(GL_ARRAY_BUFFER, GL_BUFFER_SIZE, &buffer_size);
  69
  70         return check_array_buffer_sub_data(0, buffer_size, expected_data_size,
  71                         expected_data);
  72 }
  73
  74 /* Fill the entire ARRAY_BUFFER with chunks of data of <data_size> length.
  75  */
  76 void
  77 fill_array_buffer(const int data_size, const void *const data)
  78 {
  79         int i;
  80         int buffer_size;
  81         char *buffer_data = glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
  82         glGetBufferParameteriv(GL_ARRAY_BUFFER, GL_BUFFER_SIZE, &buffer_size);
  83
  84         assert (buffer_size % data_size == 0);
  85
  86         for (i = 0; i < buffer_size; i += data_size) {
  87                 memcpy(buffer_data + i, data, data_size);
  88         }
  89
  90         glUnmapBuffer(GL_ARRAY_BUFFER);
  91 }
  92
  93
  94