Initial re-upload of spice2x-24-08-24

external/stepmaniax-sdk/sdk/Windows/SMXGif.h

@@ -0,0 +1,73 @@
+#ifndef SMXGif_h
+#define SMXGif_h
+
+#include <stdint.h>
+#include <string>
+#include <vector>
+#include <cstring>
+
+// This is a simple internal GIF decoder.  It's only meant to be used by
+// SMXConfig.
+namespace SMXGif
+{
+    struct Color
+    {
+        uint8_t color[4];
+        Color()
+        {
+            memset(color, 0, sizeof(color));
+        }
+
+        Color(uint8_t r, uint8_t g, uint8_t b, uint8_t a)
+        {
+            color[0] = r;
+            color[1] = g;
+            color[2] = b;
+            color[3] = a;
+        }
+        bool operator==(const Color &rhs) const
+        {
+            return !memcmp(color, rhs.color, sizeof(color));
+        }
+    };
+
+    struct GIFImage
+    {
+        int width = 0, height = 0;
+        void Init(int width, int height);
+
+        Color get(int x, int y) const { return image[y*width+x]; }
+        Color &get(int x, int y) { return image[y*width+x]; }
+
+        // Clear to a solid color.
+        void Clear(const Color &color);
+
+        // Copy a rectangle from this image into dst.
+        void CropImage(GIFImage &dst, int crop_left, int crop_top, int crop_width, int crop_height) const;
+
+        // Copy src into a rectangle in this image.
+        void Blit(GIFImage &src, int dst_left, int dst_top, int dst_width, int dst_height);
+
+        bool operator==(const GIFImage &rhs) const;
+
+    private:
+        std::vector<Color> image;
+    };
+
+    struct SMXGifFrame
+    {
+        int width = 0, height = 0;
+
+        // GIF images have a delay in 10ms units.  We use 1ms for clarity.
+        int milliseconds = 0;
+
+        GIFImage frame;
+    };
+
+    // Decode a GIF into a list of frames.
+    bool DecodeGIF(std::string buf, std::vector<SMXGifFrame> &frames);
+}
+
+void gif_test();
+
+#endif