| 78 | } |
| 79 | |
| 80 | sp<Image> loadImage(IFile &file) override |
| 81 | { |
| 82 | auto data = file.readAll(); |
| 83 | auto dataSize = file.size(); |
| 84 | unsigned int width, height; |
| 85 | lodepng::State png_state; |
| 86 | |
| 87 | unsigned int err = lodepng_inspect(&width, &height, &png_state, |
| 88 | reinterpret_cast<unsigned char *>(data.get()), dataSize); |
| 89 | if (err) |
| 90 | { |
| 91 | LogInfo("Failed to read PNG headers from \"%s\" (%u) : %s", file.systemPath(), err, |
| 92 | lodepng_error_text(err)); |
| 93 | return nullptr; |
| 94 | } |
| 95 | |
| 96 | LogInfo("Loading PNG \"%s\" size {%u,%d} - colour mode %d depth %u", file.systemPath(), |
| 97 | width, height, png_state.info_png.color.colortype, |
| 98 | png_state.info_png.color.bitdepth); |
| 99 | |
| 100 | // Just convert to RGBA, as PNG palettes are often reordered/trimmed at every turn by any |
| 101 | // app modifying them |
| 102 | |
| 103 | std::vector<unsigned char> image; |
| 104 | unsigned int error = lodepng::decode( |
| 105 | image, width, height, reinterpret_cast<unsigned char *>(data.get()), file.size()); |
| 106 | if (error) |
| 107 | { |
| 108 | LogInfo("LodePNG error code: %d: %s", error, lodepng_error_text(error)); |
| 109 | } |
| 110 | if (!image.size()) |
| 111 | { |
| 112 | LogInfo("Failed to load image %s (not a PNG?)", file.systemPath()); |
| 113 | return nullptr; |
| 114 | } |
| 115 | OpenApoc::Vec2<int> size(width, height); |
| 116 | auto img = mksp<OpenApoc::RGBImage>(size); |
| 117 | OpenApoc::RGBImageLock dst(img, OpenApoc::ImageLockUse::Write); |
| 118 | |
| 119 | for (int y = 0; y < size.y; y++) |
| 120 | { |
| 121 | for (int x = 0; x < size.x; x++) |
| 122 | { |
| 123 | OpenApoc::Colour c( |
| 124 | image[4 * size.x * y + 4 * x + 0], image[4 * size.x * y + 4 * x + 1], |
| 125 | image[4 * size.x * y + 4 * x + 2], image[4 * size.x * y + 4 * x + 3]); |
| 126 | dst.set(OpenApoc::Vec2<int>(x, y), c); |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | return img; |
| 131 | } |
| 132 | |
| 133 | UString getName() override { return "lodepng"; } |
| 134 | }; |