1 files changed, 151 insertions, 0 deletions
diff --git a/system/graphics/tests/gtest/TestBufferRotation.cpp b/system/graphics/tests/gtest/TestBufferRotation.cpp
new file mode 100644
index 000000000..9fb972adb
--- /dev/null
+++ b/system/graphics/tests/gtest/TestBufferRotation.cpp
@@ -0,0 +1,151 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "gtest/gtest.h"
+
+#include "BufferUnrotate.h"
+
+static unsigned char* GenerateBuffer(int bytesPerPixel,
+                                     int width, int height,
+                                     int stride, int xBoundary, int yBoundary)
+{
+  unsigned char* buffer = new unsigned char[stride*height];
+  for (int y = 0; y < height; y++) {
+    for (int x = 0; x < width; x++) {
+     int pos = ((yBoundary + y) % height) * stride +
+       ((xBoundary + x) % width) * bytesPerPixel;
+     for (int i = 0; i < bytesPerPixel; i++) {
+        buffer[pos+i] = (x+y+i*2)%256;
+      }
+    }
+  }
+  return buffer;
+}
+
+static bool CheckBuffer(unsigned char* buffer, int bytesPerPixel,
+                        int width, int height, int stride)
+{
+  int xBoundary = 0;
+  int yBoundary = 0;
+  for (int y = 0; y < height; y++) {
+    for (int x = 0; x < width; x++) {
+     int pos = ((yBoundary + y) % height) * stride +
+       ((xBoundary + x) % width) * bytesPerPixel;
+     for (int i = 0; i < bytesPerPixel; i++) {
+        if (buffer[pos+i] != (x+y+i*2)%256) {
+          printf("Buffer differs at %i, %i, is %i\n", x, y, (int)buffer[pos+i]);
+          return false;
+        }
+      }
+    }
+  }
+  return true;
+}
+
+TEST(Gfx, BufferUnrotateHorizontal) {
+  const int NUM_OF_TESTS = 8;
+  int bytesPerPixelList[2] = {2,4};
+  int width[NUM_OF_TESTS] = {100, 100, 99, 99, 100, 100, 99, 99};
+  int height[NUM_OF_TESTS] = {100, 99, 100, 99, 100, 99, 100, 99};
+  int xBoundary[NUM_OF_TESTS] = {30, 30, 30, 30, 31, 31, 31, 31};
+  int yBoundary[NUM_OF_TESTS] = {0, 0, 0, 0};
+
+  for (int bytesPerId = 0; bytesPerId < 2; bytesPerId++) {
+    int bytesPerPixel = bytesPerPixelList[bytesPerId];
+    int stride = 256 * bytesPerPixel;
+    for (int testId = 0; testId < NUM_OF_TESTS; testId++) {
+      unsigned char* buffer = GenerateBuffer(bytesPerPixel,
+          width[testId], height[testId], stride,
+          xBoundary[testId], yBoundary[testId]);
+      BufferUnrotate(buffer,
+          width[testId] * bytesPerPixel, height[testId], stride,
+          xBoundary[testId] * bytesPerPixel, yBoundary[testId]);
+
+      EXPECT_TRUE(CheckBuffer(buffer, bytesPerPixel,
+            width[testId], height[testId], stride));
+      delete[] buffer;
+    }
+  }
+}
+
+TEST(Gfx, BufferUnrotateVertical) {
+  const int NUM_OF_TESTS = 8;
+  int bytesPerPixelList[2] = {2,4};
+  int width[NUM_OF_TESTS] = {100, 100, 99, 99, 100, 100, 99, 99};
+  int height[NUM_OF_TESTS] = {100, 99, 100, 99, 100, 99, 100, 99};
+  int xBoundary[NUM_OF_TESTS] = {0, 0, 0, 0};
+  int yBoundary[NUM_OF_TESTS] = {30, 30, 30, 30, 31, 31, 31, 31};
+
+  for (int bytesPerId = 0; bytesPerId < 2; bytesPerId++) {
+    int bytesPerPixel = bytesPerPixelList[bytesPerId];
+    int stride = 256 * bytesPerPixel;
+    for (int testId = 0; testId < NUM_OF_TESTS; testId++) {
+      unsigned char* buffer = GenerateBuffer(bytesPerPixel,
+          width[testId], height[testId], stride,
+          xBoundary[testId], yBoundary[testId]);
+      BufferUnrotate(buffer, width[testId] * bytesPerPixel,
+          height[testId], stride,
+          xBoundary[testId] * bytesPerPixel, yBoundary[testId]);
+
+      EXPECT_TRUE(CheckBuffer(buffer, bytesPerPixel,
+            width[testId], height[testId], stride));
+      delete[] buffer;
+    }
+  }
+}
+
+
+TEST(Gfx, BufferUnrotateBoth) {
+  const int NUM_OF_TESTS = 16;
+  int bytesPerPixelList[2] = {2,4};
+  int width[NUM_OF_TESTS] = {100, 100, 99, 99, 100, 100, 99, 99, 100, 100, 99, 99, 100, 100, 99, 99};
+  int height[NUM_OF_TESTS] = {100, 99, 100, 99, 100, 99, 100, 99, 100, 99, 100, 99, 100, 99, 100, 99};
+  int xBoundary[NUM_OF_TESTS] = {30, 30, 30, 30, 31, 31, 31, 31, 30, 30, 30, 30, 31, 31, 31, 31};
+  int yBoundary[NUM_OF_TESTS] = {30, 30, 30, 30, 30, 30, 30, 30, 31, 31, 31, 31, 31, 31, 31, 31};
+
+  for (int bytesPerId = 0; bytesPerId < 2; bytesPerId++) {
+    int bytesPerPixel = bytesPerPixelList[bytesPerId];
+    int stride = 256 * bytesPerPixel;
+    for (int testId = 0; testId < NUM_OF_TESTS; testId++) {
+      unsigned char* buffer = GenerateBuffer(bytesPerPixel,
+          width[testId], height[testId], stride,
+          xBoundary[testId], yBoundary[testId]);
+      BufferUnrotate(buffer,
+          width[testId] * bytesPerPixel, height[testId], stride,
+          xBoundary[testId] * bytesPerPixel, yBoundary[testId]);
+
+      EXPECT_TRUE(CheckBuffer(buffer, bytesPerPixel,
+            width[testId], height[testId], stride));
+      delete[] buffer;
+    }
+  }
+}
+
+TEST(Gfx, BufferUnrotateUneven) {
+  const int NUM_OF_TESTS = 16;
+  int bytesPerPixelList[2] = {2,4};
+  int width[NUM_OF_TESTS] = {10, 100, 99, 39, 100, 40, 99, 39, 100, 50, 39, 99, 74, 60, 99, 39};
+  int height[NUM_OF_TESTS] = {100, 39, 10, 99, 10, 99, 40, 99, 73, 39, 100, 39, 67, 99, 84, 99};
+  int xBoundary[NUM_OF_TESTS] = {0, 0, 30, 30, 99, 31, 0, 31, 30, 30, 30, 30, 31, 31, 31, 38};
+  int yBoundary[NUM_OF_TESTS] = {30, 30, 0, 30, 0, 30, 0, 30, 31, 31, 31, 31, 31, 31, 31, 98};
+
+  for (int bytesPerId = 0; bytesPerId < 2; bytesPerId++) {
+    int bytesPerPixel = bytesPerPixelList[bytesPerId];
+    int stride = 256 * bytesPerPixel;
+    for (int testId = 0; testId < NUM_OF_TESTS; testId++) {
+      unsigned char* buffer = GenerateBuffer(bytesPerPixel,
+          width[testId], height[testId], stride,
+          xBoundary[testId], yBoundary[testId]);
+      BufferUnrotate(buffer,
+          width[testId]*bytesPerPixel, height[testId], stride,
+          xBoundary[testId]*bytesPerPixel, yBoundary[testId]);
+
+      EXPECT_TRUE(CheckBuffer(buffer, bytesPerPixel, width[testId], height[testId], stride));
+      delete[] buffer;
+    }
+  }
+}
+
+