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testSampleImages.cpp

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//
// Copyright (c) 2002, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
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#include <ImfRgbaFile.h>
#include <ImfArray.h>
#include <stdio.h>
#include <assert.h>

using namespace Imf;
using namespace Imath;
using namespace std;

namespace {

void
readImage (const char fileName[], unsigned int correctChecksum)
{
    cout << "file " << fileName << " " << flush;

    Imf::RgbaInputFile in (fileName);

    cout << "version " << in.version() << " " << flush;

    const Box2i &dw = in.dataWindow();

    int w = dw.max.x - dw.min.x + 1;
    int h = dw.max.y - dw.min.y + 1;
    int dx = dw.min.x;
    int dy = dw.min.y;

    Array<Imf::Rgba> pixels (w * h);
    in.setFrameBuffer (pixels - dx - dy * w, 1, w);
    in.readPixels (in.dataWindow().min.y, in.dataWindow().max.y);

    unsigned int checksum = 0;

    for (int i = 0; i < w * h; ++i)
    {
      checksum ^= pixels[i].r.bits();
      checksum ^= pixels[i].g.bits();
      checksum ^= pixels[i].b.bits();
      checksum ^= pixels[i].a.bits();
    }

    cout << "checksum = " << checksum << endl;

    assert (checksum == correctChecksum);
}

} // namespace


void
testSampleImages ()
{
    try
    {
      cout << "Testing sample image files" << endl;

      readImage ("comp_none.exr", 24988);
      readImage ("comp_rle.exr",  24988);
      readImage ("comp_zips.exr", 24988);
      readImage ("comp_zip.exr",  24988);
      readImage ("comp_piz.exr",  24988);

      cout << "ok\n" << endl;
    }
    catch (const std::exception &e)
    {
      cerr << "ERROR -- caught exception: " << e.what() << endl;
      assert (false);
    }
}

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