Added ext/img.h

microfx_src/Makefile

@@ -4,7 +4,7 @@ AR = sh-elf-ar
 OUT = libMicrofx.a
 OUT_DIR = lib
 
-SRC = src/start.c src/syscall.S src/microfx.c
+SRC = src/start.c src/syscall.S src/microfx.c src/img.c
 OBJ = $(SRC:src/%=build/%.o)
 
 BUILD = build

microfx_src/include/microfx/ext/img.h

@@ -0,0 +1,20 @@
+#ifndef IMG_H
+#define IMG_H
+
+enum {SNORMAL = 0, SINVERTED, STRANSP, SNOWHITE, SNOBLACK};
+
+/* void simage(int sx, int sy, int w, int h, unsigned char *img, int mode);
+
+Draws an image from a Sprite Coder string that is in img,
+where the top left corner is at (sx, sy).
+w is the width and h the height of the image.
+mode can be :
+SNORMAL : Draws the image normally.
+SINVERTED : Draws the image with inverted colors.
+STRANSP : Black is white and white is not drawn. Useful for
+transparency in sprites.
+*/
+
+void simage(int sx, int sy, int w, int h, unsigned char *img, int mode);
+
+#endif

microfx_src/src/img.c

@@ -0,0 +1,29 @@
+#include "../include/microfx/ext/img.h"
+#include <microfx/microfx.h>
+
+void simage(int sx, int sy, int w, int h, unsigned char *img, int mode) {
+	/* Draws an image from a sprite coder string */
+	int x, y, rpos, gpos, bpos, color;
+	for(y=0;y<h;y++){
+		for(x=0;x<w;x++){
+			rpos = y*(w+(w%2))+x;
+			gpos = rpos/8;
+			bpos = rpos%8;
+			color = (img[gpos] << bpos) & 0x80;
+			switch(mode){
+				case STRANSP:
+					if(color) spixel(sx+x, sy+y, SWHITE);
+					break;
+				case SNOWHITE:
+					if(color) spixel(sx+x, sy+y, SBLACK);
+					break;
+				case SNOBLACK:
+					if(!color) spixel(sx+x, sy+y, SWHITE);
+					break;
+				default: /* SNORMAL or SINVERTED */
+					spixel(sx+x, sy+y, mode ? !color : color);
+					break;
+			}
+		}
+	}
+}

template/lib/include/microfx/ext/img.h

@@ -0,0 +1,20 @@
+#ifndef IMG_H
+#define IMG_H
+
+enum {SNORMAL = 0, SINVERTED, STRANSP, SNOWHITE, SNOBLACK};
+
+/* void simage(int sx, int sy, int w, int h, unsigned char *img, int mode);
+
+Draws an image from a Sprite Coder string that is in img,
+where the top left corner is at (sx, sy).
+w is the width and h the height of the image.
+mode can be :
+SNORMAL : Draws the image normally.
+SINVERTED : Draws the image with inverted colors.
+STRANSP : Black is white and white is not drawn. Useful for
+transparency in sprites.
+*/
+
+void simage(int sx, int sy, int w, int h, unsigned char *img, int mode);
+
+#endif