74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
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#ifndef SMXGif_h
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#define SMXGif_h
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#include <stdint.h>
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#include <string>
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#include <vector>
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#include <cstring>
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// This is a simple internal GIF decoder. It's only meant to be used by
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// SMXConfig.
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namespace SMXGif
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{
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struct Color
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{
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uint8_t color[4];
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Color()
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{
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memset(color, 0, sizeof(color));
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}
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Color(uint8_t r, uint8_t g, uint8_t b, uint8_t a)
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{
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color[0] = r;
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color[1] = g;
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color[2] = b;
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color[3] = a;
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}
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bool operator==(const Color &rhs) const
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{
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return !memcmp(color, rhs.color, sizeof(color));
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}
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};
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struct GIFImage
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{
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int width = 0, height = 0;
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void Init(int width, int height);
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Color get(int x, int y) const { return image[y*width+x]; }
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Color &get(int x, int y) { return image[y*width+x]; }
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// Clear to a solid color.
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void Clear(const Color &color);
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// Copy a rectangle from this image into dst.
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void CropImage(GIFImage &dst, int crop_left, int crop_top, int crop_width, int crop_height) const;
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// Copy src into a rectangle in this image.
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void Blit(GIFImage &src, int dst_left, int dst_top, int dst_width, int dst_height);
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bool operator==(const GIFImage &rhs) const;
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private:
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std::vector<Color> image;
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};
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struct SMXGifFrame
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{
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int width = 0, height = 0;
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// GIF images have a delay in 10ms units. We use 1ms for clarity.
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int milliseconds = 0;
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GIFImage frame;
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};
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// Decode a GIF into a list of frames.
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bool DecodeGIF(std::string buf, std::vector<SMXGifFrame> &frames);
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}
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void gif_test();
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#endif
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