81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
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#include <mitsuba/core/bitmap.h>
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#include <mitsuba/core/fstream.h>
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#include <iomanip>
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using namespace mitsuba;
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Bitmap *downsample(const Bitmap *in) {
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Bitmap *result = new Bitmap(in->getWidth()/2, in->getHeight()/2, 128);
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const float *data = in->getFloatData();
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float *out = result->getFloatData();
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result->clear();
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for (int y=0; y<in->getWidth()/2; ++y) {
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for (int x=0; x<in->getWidth()/2; ++x) {
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Float value1 = data[(2*x + 2*y * in->getWidth()) * 4];
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Float value2 = data[(2*x + (2*y+1) * in->getWidth()) * 4];
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Float value3 = data[(2*x+1 + 2*y * in->getWidth()) * 4];
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Float value4 = data[(2*x+1 + (2*y+1) * in->getWidth()) * 4];
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Float avg = (value1+value2+value3+value4)/4;
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out[(x + y * result->getWidth()) * 4 + 0] = avg;
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out[(x + y * result->getWidth()) * 4 + 1] = avg;
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out[(x + y * result->getWidth()) * 4 + 2] = avg;
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out[(x + y * result->getWidth()) * 4 + 3] = 1;
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}
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}
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return result;
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}
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void dumpImage(const std::string &s1) {
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ref<FileStream> stream = new FileStream(s1, FileStream::EReadOnly);
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ref<Bitmap> bitmap = new Bitmap(Bitmap::EEXR, stream);
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// bitmap = downsample(bitmap);
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// bitmap = downsample(bitmap);
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stream = new FileStream("downsampled.exr", FileStream::ETruncReadWrite);
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bitmap->save(Bitmap::EEXR, stream);
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float *data = bitmap->getFloatData();
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cout << "A={" << endl;
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cout << std::fixed << endl;
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cout << std::setprecision(12)<< endl;
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for (int y=0; y<bitmap->getWidth(); ++y) {
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cout << "\t{";
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for (int x=0; x<bitmap->getWidth(); ++x) {
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cout << data[(x + y * bitmap->getWidth()) * 4];
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if (x+1 < bitmap->getWidth())
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cout << ", ";
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}
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cout << "}";
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if (y+1 < bitmap->getHeight())
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cout << ",";
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cout << endl;
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}
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cout << "};";
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}
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int main(int argc, char **argv) {
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Class::staticInitialization();
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Thread::staticInitialization();
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Logger::staticInitialization();
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Spectrum::staticInitialization();
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try {
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if (argc < 2) {
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cout << "dumpimage <image.exr>" << endl;
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} else {
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dumpImage(argv[1]);
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}
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} catch (const std::exception &e) {
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std::cerr << "Caught a critical exeption: " << e.what() << std::endl;
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exit(-1);
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} catch (...) {
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std::cerr << "Caught a critical exeption of unknown type! " << std::endl;
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exit(-1);
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}
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Spectrum::staticShutdown();
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Logger::staticShutdown();
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Thread::staticShutdown();
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Class::staticShutdown();
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return 0;
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}
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