add missing tools/pngdump to the repo

[gbajam22] / tools / pngdump / image.h

diff --git a/tools/pngdump/image.h b/tools/pngdump/image.h
new file mode 100644 (file)
index 0000000..f86de94
--- /dev/null
+++ b/tools/pngdump/image.h
@@ -0,0 +1,38 @@
+#ifndef IMAGE_H_
+#define IMAGE_H_
+
+#include <stdio.h>
+
+struct cmapent {
+       unsigned char r, g, b;
+};
+
+struct image {
+       int width, height;
+       int bpp;
+       int nchan;
+       int scansz;     /* scanline size in bytes */
+       int pitch;      /* bytes from one scanline to the next */
+       int cmap_ncolors;
+       struct cmapent cmap[256];
+       unsigned char *pixels;
+};
+
+int alloc_image(struct image *img, int x, int y, int bpp);
+int load_image(struct image *img, const char *fname);
+int save_image(struct image *img, const char *fname);
+int save_image_file(struct image *img, FILE *fp);
+
+int cmp_image(struct image *a, struct image *b);
+
+void blit(struct image *src, int sx, int sy, int w, int h, struct image *dst, int dx, int dy);
+void overlay_key(struct image *src, unsigned int key, struct image *dst);
+
+unsigned int get_pixel(struct image *img, int x, int y);
+unsigned int get_pixel_rgb(struct image *img, int x, int y, unsigned int *rgb);
+void put_pixel(struct image *img, int x, int y, unsigned int pix);
+
+int quantize_image(struct image *img, int maxcol);
+int gen_shades(struct image *img, int levels, int maxcol, int *shade_lut);
+
+#endif /* IMAGE_H_ */