FasTC/PVRTCEncoder/test/DecompressorTest.cpp

/* FasTC
 * Copyright (c) 2013 University of North Carolina at Chapel Hill.
 * All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for educational, research, and non-profit purposes, without
 * fee, and without a written agreement is hereby granted, provided that the
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 *
 * Permission to incorporate this software into commercial products may be
 * obtained by contacting the authors or the Office of Technology Development
 * at the University of North Carolina at Chapel Hill <otd@unc.edu>.
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 * This software program and documentation are copyrighted by the University of
 * North Carolina at Chapel Hill. The software program and documentation are
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 * North Carolina at Chapel Hill or the authors. The University of North
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 * that the program was developed for research purposes and is advised not to
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 * IN NO EVENT SHALL THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL OR THE
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 * Please send all BUG REPORTS to <pavel@cs.unc.edu>.
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 *
 * Pavel Krajcevski
 * Dept of Computer Science
 * 201 S Columbia St
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 * <http://gamma.cs.unc.edu/FasTC/>
 */

#include "gtest/gtest.h"

#include "TestUtils.h"

#include "PVRTCCompressor.h"

TEST(Decompressor, DecompressWhite) {
  const uint32 kWidth = 32;
  const uint32 kHeight = 32;

  uint8 pvrData[512];

  for(int i = 0; i < 512; i += 8) {
    uint8 whiteBlock[8] = { 0xAA, 0xAA, 0xAA, 0xAA, 0xFE, 0xFF, 0xFF, 0xFF };
    memcpy(pvrData + i, whiteBlock, 8);
  }

  uint8 outData[4 * kWidth * kHeight];

  DecompressionJob dcj (pvrData, outData, kWidth, kHeight);
  PVRTCC::Decompress(dcj);

  for(uint32 i = 0; i < kWidth; i++) {
    for(uint32 j = 0; j < kHeight; j++) {
      const uint32 *pixelData = reinterpret_cast<const uint32 *>(outData);
      const uint32 p = pixelData[j*kWidth + i];
      EXPECT_EQ(PixelPrinter(p), PixelPrinter(0xFFFFFFFF));
    }
  }
}

TEST(Decompressor, DecompressGray) {
  const uint32 kWidth = 32;
  const uint32 kHeight = 32;

  uint8 pvrData[512];

  for(uint32 i = 0; i < 512; i += 8) {
    uint8 grayBlock[8] = { 0xAA, 0xAA, 0xAA, 0xAA, 0xF0, 0xBD, 0x0F, 0xC2 };
    memcpy(pvrData + i, grayBlock, 8);
  }

  uint8 outData[4 * kWidth * kHeight];

  DecompressionJob dcj (pvrData, outData, kWidth, kHeight);
  PVRTCC::Decompress(dcj);

  for(uint32 i = 0; i < kWidth; i++) {
    for(uint32 j = 0; j < kHeight; j++) {
      const uint32 *pixelData = reinterpret_cast<const uint32 *>(outData);
      const uint32 p = pixelData[j*kWidth + i];
      EXPECT_EQ(PixelPrinter(p), PixelPrinter(0xFF818080));
    }
  }
}