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cs440-acg/ext/openexr/OpenEXR/IlmImfTest/testPreviewImage.cpp
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cs440-acg/ext/openexr/OpenEXR/IlmImfTest/testPreviewImage.cpp
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///////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2003-2012, 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 <ImfRgbaFile.h>
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#include <ImfArray.h>
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#include <ImfPreviewImage.h>
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#include <fstream>
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#include <stdio.h>
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#include <assert.h>
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#ifndef ILM_IMF_TEST_IMAGEDIR
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#define ILM_IMF_TEST_IMAGEDIR
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#endif
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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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readWriteFiles (const char fileName1[],
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const char fileName2[],
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const char fileName3[])
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{
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//
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// Test if the preview image attribute works correctly:
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//
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// Read file1, which does not contain a preview image.
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//
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// Generate a preview image, and store both the pixels
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// from file 1 and the preview image in file 2.
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//
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// Read file 2, and verify that both the preview image, and
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// the main image are exactly what we stored in the file.
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//
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// Write file 3, with the same main image as file 2, but
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// initially leave the preview image blank. Update the
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// preview image half way through writing the main image's
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// pixels.
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//
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// Compare file 2 and file 3 byte by byte, and verify that
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// the files are identical.
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//
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cout << "reading file " << fileName1 << endl;
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RgbaInputFile file1 (fileName1);
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assert (!file1.header().hasPreviewImage());
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const Box2i &dw = file1.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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Array<OPENEXR_IMF_NAMESPACE::Rgba> pixels1 (w * h);
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file1.setFrameBuffer (pixels1 - dx - dy * w, 1, w);
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file1.readPixels (dw.min.y, dw.max.y);
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cout << "generating preview image" << endl;
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const int PREVIEW_WIDTH = 128;
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const int PREVIEW_HEIGHT = 64;
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PreviewImage preview1 (PREVIEW_WIDTH, PREVIEW_HEIGHT);
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for (int y = 0; y < PREVIEW_HEIGHT; ++y)
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for (int x = 0; x < PREVIEW_WIDTH; ++x)
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preview1.pixel (x, y) = PreviewRgba (x*2, y*4, x+y, 128);
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cout << "writing file " << fileName2 << endl;
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{
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Header header (file1.header());
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header.setPreviewImage (preview1);
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RgbaOutputFile file2 (fileName2, header);
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file2.setFrameBuffer (pixels1 - dx - dy * w, 1, w);
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for (int y = dw.min.y; y <= dw.max.y; ++y)
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file2.writePixels (1);
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}
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cout << "reading file " << fileName2 << endl;
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{
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RgbaInputFile file2 (fileName2);
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assert (file2.header().hasPreviewImage());
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const PreviewImage &preview2 = file2.header().previewImage();
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for (int i = 0; i < PREVIEW_WIDTH * PREVIEW_HEIGHT; ++i)
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{
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assert (preview1.pixels()[i].r == preview2.pixels()[i].r);
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assert (preview1.pixels()[i].g == preview2.pixels()[i].g);
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assert (preview1.pixels()[i].b == preview2.pixels()[i].b);
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assert (preview1.pixels()[i].a == preview2.pixels()[i].a);
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}
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assert (dw == file2.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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Array<OPENEXR_IMF_NAMESPACE::Rgba> pixels2 (w * h);
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file2.setFrameBuffer (pixels2 - dx - dy * w, 1, w);
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file2.readPixels (dw.min.y, dw.max.y);
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for (int i = 0; i < w * h; ++h)
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{
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assert (pixels1[i].r == pixels2[i].r);
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assert (pixels1[i].g == pixels2[i].g);
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assert (pixels1[i].b == pixels2[i].b);
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assert (pixels1[i].a == pixels2[i].a);
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}
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}
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cout << "writing file " << fileName3 << endl;
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{
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Header header (file1.header());
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header.setPreviewImage (PreviewImage (PREVIEW_WIDTH, PREVIEW_HEIGHT));
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RgbaOutputFile file3 (fileName3, header);
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file3.setFrameBuffer (pixels1 - dx - dy * w, 1, w);
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for (int y = dw.min.y; y <= dw.max.y; ++y)
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{
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file3.writePixels (1);
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if (y == (dw.min.y + dw.max.y) / 2)
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file3.updatePreviewImage (preview1.pixels());
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}
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}
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cout << "comparing files " << fileName2 << " and " << fileName3 << endl;
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{
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ifstream file2 (fileName2, std::ios_base::binary);
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ifstream file3 (fileName3, std::ios_base::binary);
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while (true)
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{
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int c2 = file2.get();
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int c3 = file3.get();
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if (file2.eof())
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break;
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assert (c2 == c3);
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assert (!!file2 && !!file3);
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}
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}
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remove (fileName2);
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remove (fileName3);
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}
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} // namespace
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void
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testPreviewImage (const std::string &tempDir)
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{
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std::string filename1 = tempDir + "imf_preview1.exr";
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std::string filename2 = tempDir + "imf_preview2.exr";
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try
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{
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cout << "Testing preview image attribute" << endl;
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readWriteFiles (ILM_IMF_TEST_IMAGEDIR "comp_piz.exr",
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filename1.c_str(),
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filename2.c_str());
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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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