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Halide image_io JPEG saver
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| #include "jo_jpeg.cpp" // http://www.jonolick.com/uploads/7/9/2/1/7921194/jo_jpeg.cpp | |
| template<typename T> | |
| void save_jpeg(Image<T> im, std::string filename, int quality = 90) { | |
| _assert(im.channels() > 0 && im.channels() < 5, | |
| "Can't write JPEG files that have other than 1, 2, 3, or 4 channels\n"); | |
| im.copy_to_host(); | |
| // convert to 8-bit and interleave | |
| uint8_t* buf = new uint8_t[im.width()*im.height()*im.channels()]; | |
| int y_stride = im.width()*im.channels(), | |
| x_stride = im.channels(); | |
| for (int y = 0; y < im.height(); ++y) { | |
| for (int x = 0; x < im.width(); ++x) { | |
| for (int c = 0; c < im.channels(); ++c) { | |
| convert(im(x, y, c), buf[y*y_stride + x*x_stride + c]); | |
| } | |
| } | |
| } | |
| bool success = jo_write_jpg(filename.c_str(), | |
| (void*)buf, | |
| im.width(), | |
| im.height(), | |
| im.channels(), | |
| quality); | |
| _assert(success, "Failed to write JPEG\n"); | |
| delete buf; | |
| } |
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