gfx/tests/gtest/TestBufferRotation.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "gtest/gtest.h"
   8
   9 #include "BufferUnrotate.h"
  10
  11 using mozilla::gfx::BufferUnrotate;
  12
  13 static unsigned char* GenerateBuffer(int bytesPerPixel, int width, int height,
  14                                      int stride, int xBoundary, int yBoundary) {
  15   unsigned char* buffer = new unsigned char[stride * height];
  16   for (int y = 0; y < height; y++) {
  17     for (int x = 0; x < width; x++) {
  18       int pos = ((yBoundary + y) % height) * stride +
  19                 ((xBoundary + x) % width) * bytesPerPixel;
  20       for (int i = 0; i < bytesPerPixel; i++) {
  21         buffer[pos + i] = (x + y + i * 2) % 256;
  22       }
  23     }
  24   }
  25   return buffer;
  26 }
  27
  28 static bool CheckBuffer(unsigned char* buffer, int bytesPerPixel, int width,
  29                         int height, int stride) {
  30   int xBoundary = 0;
  31   int yBoundary = 0;
  32   for (int y = 0; y < height; y++) {
  33     for (int x = 0; x < width; x++) {
  34       int pos = ((yBoundary + y) % height) * stride +
  35                 ((xBoundary + x) % width) * bytesPerPixel;
  36       for (int i = 0; i < bytesPerPixel; i++) {
  37         if (buffer[pos + i] != (x + y + i * 2) % 256) {
  38           printf("Buffer differs at %i, %i, is %i\n", x, y,
  39                  (int)buffer[pos + i]);
  40           return false;
  41         }
  42       }
  43     }
  44   }
  45   return true;
  46 }
  47
  48 TEST(Gfx, BufferUnrotateHorizontal)
  49 {
  50   const int NUM_OF_TESTS = 8;
  51   int bytesPerPixelList[2] = {2, 4};
  52   int width[NUM_OF_TESTS] = {100, 100, 99, 99, 100, 100, 99, 99};
  53   int height[NUM_OF_TESTS] = {100, 99, 100, 99, 100, 99, 100, 99};
  54   int xBoundary[NUM_OF_TESTS] = {30, 30, 30, 30, 31, 31, 31, 31};
  55   int yBoundary[NUM_OF_TESTS] = {0, 0, 0, 0};
  56
  57   for (int bytesPerId = 0; bytesPerId < 2; bytesPerId++) {
  58     int bytesPerPixel = bytesPerPixelList[bytesPerId];
  59     int stride = 256 * bytesPerPixel;
  60     for (int testId = 0; testId < NUM_OF_TESTS; testId++) {
  61       unsigned char* buffer =
  62           GenerateBuffer(bytesPerPixel, width[testId], height[testId], stride,
  63                          xBoundary[testId], yBoundary[testId]);
  64       BufferUnrotate(buffer, width[testId] * bytesPerPixel, height[testId],
  65                      stride, xBoundary[testId] * bytesPerPixel,
  66                      yBoundary[testId]);
  67
  68       EXPECT_TRUE(CheckBuffer(buffer, bytesPerPixel, width[testId],
  69                               height[testId], stride));
  70       delete[] buffer;
  71     }
  72   }
  73 }
  74
  75 TEST(Gfx, BufferUnrotateVertical)
  76 {
  77   const int NUM_OF_TESTS = 8;
  78   int bytesPerPixelList[2] = {2, 4};
  79   int width[NUM_OF_TESTS] = {100, 100, 99, 99, 100, 100, 99, 99};
  80   int height[NUM_OF_TESTS] = {100, 99, 100, 99, 100, 99, 100, 99};
  81   int xBoundary[NUM_OF_TESTS] = {0, 0, 0, 0};
  82   int yBoundary[NUM_OF_TESTS] = {30, 30, 30, 30, 31, 31, 31, 31};
  83
  84   for (int bytesPerId = 0; bytesPerId < 2; bytesPerId++) {
  85     int bytesPerPixel = bytesPerPixelList[bytesPerId];
  86     int stride = 256 * bytesPerPixel;
  87     for (int testId = 0; testId < NUM_OF_TESTS; testId++) {
  88       unsigned char* buffer =
  89           GenerateBuffer(bytesPerPixel, width[testId], height[testId], stride,
  90                          xBoundary[testId], yBoundary[testId]);
  91       BufferUnrotate(buffer, width[testId] * bytesPerPixel, height[testId],
  92                      stride, xBoundary[testId] * bytesPerPixel,
  93                      yBoundary[testId]);
  94
  95       EXPECT_TRUE(CheckBuffer(buffer, bytesPerPixel, width[testId],
  96                               height[testId], stride));
  97       delete[] buffer;
  98     }
  99   }
 100 }
 101
 102 TEST(Gfx, BufferUnrotateBoth)
 103 {
 104   const int NUM_OF_TESTS = 16;
 105   int bytesPerPixelList[2] = {2, 4};
 106   int width[NUM_OF_TESTS] = {100, 100, 99, 99, 100, 100, 99, 99,
 107                              100, 100, 99, 99, 100, 100, 99, 99};
 108   int height[NUM_OF_TESTS] = {100, 99, 100, 99, 100, 99, 100, 99,
 109                               100, 99, 100, 99, 100, 99, 100, 99};
 110   int xBoundary[NUM_OF_TESTS] = {30, 30, 30, 30, 31, 31, 31, 31,
 111                                  30, 30, 30, 30, 31, 31, 31, 31};
 112   int yBoundary[NUM_OF_TESTS] = {30, 30, 30, 30, 30, 30, 30, 30,
 113                                  31, 31, 31, 31, 31, 31, 31, 31};
 114
 115   for (int bytesPerId = 0; bytesPerId < 2; bytesPerId++) {
 116     int bytesPerPixel = bytesPerPixelList[bytesPerId];
 117     int stride = 256 * bytesPerPixel;
 118     for (int testId = 0; testId < NUM_OF_TESTS; testId++) {
 119       unsigned char* buffer =
 120           GenerateBuffer(bytesPerPixel, width[testId], height[testId], stride,
 121                          xBoundary[testId], yBoundary[testId]);
 122       BufferUnrotate(buffer, width[testId] * bytesPerPixel, height[testId],
 123                      stride, xBoundary[testId] * bytesPerPixel,
 124                      yBoundary[testId]);
 125
 126       EXPECT_TRUE(CheckBuffer(buffer, bytesPerPixel, width[testId],
 127                               height[testId], stride));
 128       delete[] buffer;
 129     }
 130   }
 131 }
 132
 133 TEST(Gfx, BufferUnrotateUneven)
 134 {
 135   const int NUM_OF_TESTS = 16;
 136   int bytesPerPixelList[2] = {2, 4};
 137   int width[NUM_OF_TESTS] = {10,  100, 99, 39, 100, 40, 99, 39,
 138                              100, 50,  39, 99, 74,  60, 99, 39};
 139   int height[NUM_OF_TESTS] = {100, 39, 10,  99, 10, 99, 40, 99,
 140                               73,  39, 100, 39, 67, 99, 84, 99};
 141   int xBoundary[NUM_OF_TESTS] = {0,  0,  30, 30, 99, 31, 0,  31,
 142                                  30, 30, 30, 30, 31, 31, 31, 38};
 143   int yBoundary[NUM_OF_TESTS] = {30, 30, 0,  30, 0,  30, 0,  30,
 144                                  31, 31, 31, 31, 31, 31, 31, 98};
 145
 146   for (int bytesPerId = 0; bytesPerId < 2; bytesPerId++) {
 147     int bytesPerPixel = bytesPerPixelList[bytesPerId];
 148     int stride = 256 * bytesPerPixel;
 149     for (int testId = 0; testId < NUM_OF_TESTS; testId++) {
 150       unsigned char* buffer =
 151           GenerateBuffer(bytesPerPixel, width[testId], height[testId], stride,
 152                          xBoundary[testId], yBoundary[testId]);
 153       BufferUnrotate(buffer, width[testId] * bytesPerPixel, height[testId],
 154                      stride, xBoundary[testId] * bytesPerPixel,
 155                      yBoundary[testId]);
 156
 157       EXPECT_TRUE(CheckBuffer(buffer, bytesPerPixel, width[testId],
 158                               height[testId], stride));
 159       delete[] buffer;
 160     }
 161   }
 162 }