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cs440-acg/ext/openexr/OpenEXR/IlmImfTest/testCopyPixels.cpp
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cs440-acg/ext/openexr/OpenEXR/IlmImfTest/testCopyPixels.cpp
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///////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2002-2012, Industrial Light & Magic, a division of Lucas
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// Digital Ltd. LLC
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Industrial Light & Magic nor the names of
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// its contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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///////////////////////////////////////////////////////////////////////////
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#include <ImfOutputFile.h>
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#include <ImfInputFile.h>
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#include <ImfChannelList.h>
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#include <ImfArray.h>
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#include <half.h>
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#include <stdio.h>
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#include <assert.h>
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using namespace OPENEXR_IMF_NAMESPACE;
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using namespace std;
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using namespace IMATH_NAMESPACE;
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namespace {
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void
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fillPixels (Array2D<half> &ph, int width, int height)
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{
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for (int y = 0; y < height; ++y)
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for (int x = 0; x < width; ++x)
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ph[y][x] = sin (double (x)) + sin (y * 0.5);
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}
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void
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writeCopyRead (const Array2D<half> &ph1,
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const char fileName1[],
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const char fileName2[],
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int width,
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int height,
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int xOffset,
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int yOffset,
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Compression comp)
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{
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//
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// Write the pixel data in ph1 to an image file using the
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// specified compression type and subsampling rates.
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// Then copy the image file using OutputFile::copyPixels()
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// Read the pixel data back from the copied file verify
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// that the data are the same as those in ph1.
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//
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cout << "compression " << comp << ":" << flush;
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Header hdr ((Box2i (V2i (0, 0), // display window
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V2i (width - 1, height -1))),
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(Box2i (V2i (xOffset, yOffset), // data window
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V2i (xOffset + width - 1, yOffset + height - 1))));
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hdr.compression() = comp;
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hdr.channels().insert ("H", Channel (HALF, 1, 1));
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{
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FrameBuffer fb;
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fb.insert ("H", // name
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Slice (HALF, // type
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(char *) &ph1[-yOffset][-xOffset], // base
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sizeof (ph1[0][0]), // xStride
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sizeof (ph1[0][0]) * width, // yStride
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1, // xSampling
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1) // ySampling
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);
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cout << " writing" << flush;
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remove (fileName1);
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OutputFile out (fileName1, hdr);
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out.setFrameBuffer (fb);
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out.writePixels (height);
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}
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{
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cout << " copying" << flush;
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remove (fileName2);
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InputFile in (fileName1);
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OutputFile out (fileName2, in.header());
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out.copyPixels (in);
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}
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{
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cout << " reading" << flush;
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InputFile in1 (fileName1);
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InputFile in2 (fileName2);
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const Box2i &dw = in2.header().dataWindow();
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int w = dw.max.x - dw.min.x + 1;
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int h = dw.max.y - dw.min.y + 1;
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int dx = dw.min.x;
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int dy = dw.min.y;
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Array2D<half> ph1 (h, w);
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Array2D<half> ph2 (h, w);
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FrameBuffer fb1;
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FrameBuffer fb2;
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fb1.insert ("H", // name
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Slice (HALF, // type
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(char *) &ph1[-dy][-dx], // base
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sizeof (ph1[0][0]), // xStride
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sizeof (ph1[0][0]) * w, // yStride
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1, // xSampling
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1) // ySampling
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);
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fb2.insert ("H", // name
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Slice (HALF, // type
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(char *) &ph2[-dy][-dx], // base
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sizeof (ph2[0][0]), // xStride
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sizeof (ph2[0][0]) * w, // yStride
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1, // xSampling
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1) // ySampling
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);
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in1.setFrameBuffer (fb1);
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in1.readPixels (dw.min.y, dw.max.y);
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in2.setFrameBuffer (fb2);
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in2.readPixels (dw.min.y, dw.max.y);
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cout << " comparing" << flush;
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assert (in2.header().displayWindow() == hdr.displayWindow());
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assert (in2.header().dataWindow() == hdr.dataWindow());
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assert (in2.header().pixelAspectRatio() == hdr.pixelAspectRatio());
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assert (in2.header().screenWindowCenter() == hdr.screenWindowCenter());
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assert (in2.header().screenWindowWidth() == hdr.screenWindowWidth());
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assert (in2.header().lineOrder() == hdr.lineOrder());
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assert (in2.header().compression() == hdr.compression());
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assert (in2.header().channels() == hdr.channels());
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for (int y = 0; y < h; ++y)
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for (int x = 0; x < w; ++x)
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assert (ph1[y][x] == ph2[y][x]);
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}
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remove (fileName1);
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remove (fileName2);
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cout << endl;
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}
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void
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writeCopyRead (const std::string &tempDir, const Array2D<half> &ph, int w, int h, int dx, int dy)
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{
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std::string filename1 = tempDir + "imf_test_copy1.exr";
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std::string filename2 = tempDir + "imf_test_copy2.exr";
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for (int comp = 0; comp < NUM_COMPRESSION_METHODS; ++comp)
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{
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writeCopyRead (ph,
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filename1.c_str(),
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filename2.c_str(),
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w, h,
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dx, dy,
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Compression (comp));
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}
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}
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} // namespace
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void
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testCopyPixels (const std::string &tempDir)
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{
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try
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{
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cout << "Testing fast pixel copying" << endl;
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const int W = 371;
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const int H = 559;
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const int DX = 17;
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const int DY = 29;
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Array2D<half> ph (H, W);
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fillPixels (ph, W, H);
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writeCopyRead (tempDir, ph, W, H, 0, 0);
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writeCopyRead (tempDir, ph, W, H, 0, DY);
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writeCopyRead (tempDir, ph, W, H, DX, 0);
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writeCopyRead (tempDir, ph, W, H, DX, DY);
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cout << "ok\n" << endl;
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}
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catch (const std::exception &e)
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{
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cerr << "ERROR -- caught exception: " << e.what() << endl;
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assert (false);
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}
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}
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