| 46 | | #ifdef __APPLE__ |
| 47 | | |
| 48 | | bool dctDecode(Buffer dctData, Buffer pixelData, int components) |
| 49 | | { |
| 50 | | CGDataProviderRef source = |
| 51 | | CGDataProviderCreateWithData(NULL, dctData.data(), |
| 52 | | dctData.size(), NULL); |
| 53 | | CGImageRef bitmap = |
| 54 | | CGImageCreateWithJPEGDataProvider(source, NULL, false, |
| 55 | | kCGRenderingIntentDefault); |
| 56 | | |
| 57 | | if (CGImageGetBitsPerComponent(bitmap) != 8) |
| 58 | | return false; |
| 59 | | |
| 60 | | int w = CGImageGetWidth(bitmap); |
| 61 | | int h = CGImageGetHeight(bitmap); |
| 62 | | int bytes = CGImageGetBitsPerPixel(bitmap) / 8; |
| 63 | | int stride = CGImageGetBytesPerRow(bitmap); |
| 64 | | |
| 65 | | CGBitmapInfo info = CGImageGetBitmapInfo(bitmap); |
| 66 | | // TODO: check for alpha channel, float pixel values, and byte order? |
| 67 | | ipeDebug("dctDecode: %d x %d x %d, stride %d, info %x", |
| 68 | | w, h, bytes, stride, info); |
| 69 | | |
| 70 | | // TODO: Is it necessary to copy the data? |
| 71 | | CFDataRef pixels = CGDataProviderCopyData(CGImageGetDataProvider(bitmap)); |
| 72 | | const uchar *inRow = CFDataGetBytePtr(pixels); |
| 73 | | |
| 74 | | uchar *q = (uchar *) pixelData.data(); |
| 75 | | for (int y = 0; y < h; ++y) { |
| 76 | | const uchar *p = inRow; |
| 77 | | for (int x = 0; x < w; ++x) { |
| 78 | | *q++ = p[0]; |
| 79 | | *q++ = p[1]; |
| 80 | | *q++ = p[2]; |
| 81 | | p += bytes; |
| 82 | | } |
| 83 | | inRow += stride; |
| 84 | | } |
| 85 | | CFRelease(pixels); |
| 86 | | CGImageRelease(bitmap); |
| 87 | | CGDataProviderRelease(source); |
| 88 | | return true; |
| 89 | | } |
| 90 | | |
| 91 | | #else |
| 92 | | |
