save edited sprites to disk and use them in-game

testbed.c

@@ -50,6 +50,38 @@ void text_draw(unsigned int vidOffset, unsigned char *s) {
   }
 }
 
+/*** I / O ***/
+size_t fwritefar(FILE *fp, void far *buf, size_t length) {
+  char nearbuf[32];
+  size_t written = 0;
+  size_t towrite;
+
+  for (; towrite = min(32, length), length > 0; length -= towrite) {
+    movedata(FP_SEG(buf), FP_OFF(buf) + written, _SS, nearbuf, towrite);
+    if (!fwrite(nearbuf, towrite, 1, fp)) {
+      break;
+    }
+    written += towrite;
+  }
+  return written;
+}
+
+size_t freadfar(FILE *fp, void far *buf, size_t length) {
+  char nearbuf[32];
+  size_t totalread = 0;
+  size_t toread;
+
+  for (; toread = min(32, length), length > 0; length -= toread) {
+    size_t bytesread = fread(nearbuf, 1, toread, fp);
+    movedata(_SS, nearbuf, FP_SEG(buf), FP_OFF(buf) + totalread, bytesread);
+    totalread += bytesread;
+    if (bytesread != toread) {
+      break;
+    }
+  }
+  return totalread;
+}
+
 /*** S C R A T C H ***/
 
 #define NUM_SPRITES 64
@@ -109,6 +141,8 @@ void f_loadtiles() {
   DROP(1);
 }
 
+#define SPRITE_GFX
+
 void game_init() {
   FILE *f;
   TifImageMeta_t meta;
@@ -132,10 +166,16 @@ void game_init() {
   tifLoadEGA(f, meta, 0, 48, 336);
   fclose(f);
 
+#ifdef SPRITE_GFX
+  f = fopen("sprite.gfx", "rb");
+  freadfar(f, sprites, NUM_SPRITES * SPRITE_STRIDE * 2);
+  fclose(f);
+#else
   f = fopen("SPRITE.TIF", "rb");
   meta = tifLoadMeta(f);
   tifLoad(f, meta, sprites, NUM_SPRITES * 16, 16, 5);
   fclose(f);
+#endif
 
   f = fopen("PORTRAIT.TIF", "rb");
   meta = tifLoadMeta(f);
@@ -319,6 +359,13 @@ void f_drawfatbox() {
   DROP(3);
 }
 
+void f_savegfx() {
+  FILE *fp;
+  fp = fopen("sprite.gfx", "wb");
+  fwritefar(fp, sprites, NUM_SPRITES * SPRITE_STRIDE * 2);
+  fclose(fp);
+}
+
 void f_mousehide() {
   mouse_hide();
 }
@@ -402,6 +449,7 @@ void game_f_init(char *exe, char *bootjor) {
   CDEF("putpixel", f_putpixel);
   CDEF("getpixel", f_getpixel);
   CDEF("spritecount", f_spritecount);
+  CDEF("savegfx", f_savegfx);
 
   f_loadjor(bootjor);