Why not?

src/cmd/jpg/bmp.h

@@ -0,0 +1,37 @@
+
+#define BMP_RGB      	0
+#define BMP_RLE8     	1
+#define BMP_RLE4     	2
+#define BMP_BITFIELDS	3
+
+typedef struct {
+	uchar red;
+	uchar green;
+	uchar blue;
+	uchar alpha;
+} Rgb;
+
+typedef struct {
+        short	type;
+        long	size;
+        short	reserved1;
+        short	reserved2;
+        long	offbits;
+} Filehdr;
+
+typedef struct {
+	long	size;		/* Size of the Bitmap-file */
+	long	lReserved;	/* Reserved */
+	long	dataoff;	/* Picture data location */
+	long	hsize;		/* Header-Size */
+	long	width;		/* Picture width (pixels) */
+	long	height;		/* Picture height (pixels) */
+	short	planes;		/* Planes (must be 1) */
+	short	bpp;		/* Bits per pixel (1, 4, 8 or 24) */
+	long	compression;	/* Compression mode */
+	long	imagesize;	/* Image size (bytes) */
+	long	hres;		/* Horizontal Resolution (pels/meter) */
+	long	vres;		/* Vertical Resolution (pels/meter) */
+	long	colours;	/* Used Colours (Col-Table index) */
+	long	impcolours;	/* Important colours (Col-Table index) */
+} Infohdr;