fix graphical artifacts, add eyedropper

jiles.jor

@@ -22,13 +22,19 @@ var spriteindex
 
 
 : refresh
-  spriteindex @ drawfatsprite ;
+  mousehide spriteindex @ drawfatsprite mouseshow ;
 
 : mousepos>sprpos 3 >> swap 3 >> swap ;
-
+: mousexys mousepos mousepos>sprpos spriteindex @ ;
 : tick
-  MOUSEL clicked if
+  MOUSEL mousedown if
-    color @ mousepos mousepos>sprpos spriteindex @ putpixel
+    mousexys getpixel color @ != if
+      color @ mousexys putpixel
+      refresh
+    then
+  then
+  MOUSER clicked if
+    mousexys getpixel color !
   then
   tick-debounce
   ;

testbed.c

@@ -264,31 +264,53 @@ void f_glitch() {
 }
 
 /* JILES */
-#define SCREEN_STRIDE 320
+#define SCREEN_STRIDE 40
+void f_mousehide() {
+  mouse_hide();
+}
 void f_mouseshow() {
   setLogicalWidth(SCREEN_STRIDE >> 1);
   mouse_show();
 }
 
+int getpixel(int x, int y, unsigned int far *spr) {
+  int shift = (15 - x);
+  int b = (spr[y +  0] & (1 << shift)) >> shift;
+  int g = (spr[y + 16] & (1 << shift)) >> shift;
+  int r = (spr[y + 32] & (1 << shift)) >> shift;
+  int i = (spr[y + 48] & (1 << shift)) >> shift;
+  return b | (g << 1) | (r << 2) | (i << 3);
+}
+
 void f_drawfatsprite() {
   int isprite = TOP().i;
   unsigned int dst = 0;
   unsigned int far *spr = &sprites[isprite * SPRITE_STRIDE];
-  int x, y, faty;
+  int x, y, faty, resetEnabled;
 
   DROP(1);
   setWriteMode(0);
+  setAllPlanes();
+  setResetEnabled(0x0f);
+  resetEnabled = 1;
   for ( y = 0; y < 16; y ++ ) {
     for ( x = 0; x < 16; x ++ ) {
-      int shift = (15 - x);
+      int color = getpixel(x, y, spr);
-      int b = (spr[y +  0] & (1 << shift)) >> shift;
+      int fill1 = color & 0x10 ? 0xff : 0x55;
-      int g = (spr[y + 16] & (1 << shift)) >> shift;
-      int r = (spr[y + 32] & (1 << shift)) >> shift;
-      int i = (spr[y + 48] & (1 << shift)) >> shift;
-      int colour = b | (g << 1) | (r << 2) | (i << 3);
-      int fill1 = (spr[y + 64] & (1 << shift)) ? 0xff : 0x55;
       int fill2 = fill1 == 0xff ? 0xff : 0xaa;
-      setPlaneColor(colour);
+
+      if (color >= 0x0f) {
+	if (resetEnabled) {
+	  setResetEnabled(0);
+	  resetEnabled = 0;
+	}
+      } else {
+	if (!resetEnabled) {
+	  setResetEnabled(0x0f);
+	  resetEnabled = 1;
+	}
+	setResetMask(color);
+      }
       for ( faty = 0; faty < 8; faty ++) {
 	VID[dst + x + (SCREEN_STRIDE * faty)] = (faty % 2) ? fill1 : fill2;
       }
@@ -322,6 +344,16 @@ void f_putpixel() {
   spr[y + 64] = (spr[y + 64] & ~(1 << shift)) | (v << shift);
 }
 
+void f_getpixel() {
+  int isprite = TOP().i;
+  unsigned int far *spr = &sprites[isprite * SPRITE_STRIDE];
+  int x = ST2().i;
+  int y = ST1().i;
+  DROP(2);
+
+  TOP().i = getpixel(x, y, spr);
+}
+
 /* INIT */
 void game_f_init(char *exe, char *bootjor) {
   f_init(exe);
@@ -349,8 +381,10 @@ void game_f_init(char *exe, char *bootjor) {
   CDEF("unfuck", tile_init);
 
   CDEF("mouseshow", f_mouseshow);
+  CDEF("mousehide", f_mousehide);
   CDEF("drawfatsprite", f_drawfatsprite);
   CDEF("putpixel", f_putpixel);
+  CDEF("getpixel", f_getpixel);
 
   f_loadjor(bootjor);
 

video.h

@@ -18,7 +18,11 @@
 #define setPlaneColor(c) outport(REG_TS, 2 | (c << 8))
 #define setAllPlanes() setPlaneColor(0x0f)
 
-#define setWriteMode(m) outport(REG_GDC, 0x05 | m << 8)
+#define setWriteMode(m) outport(REG_GDC, 0x05 | (m << 8))
+#define setBitMask(m) outport(REG_GDC, 0x08 | (m << 8))
+
+#define setResetEnabled(m) outport(REG_GDC, 0x01 | (m << 8))
+#define setResetMask(m) outport(REG_GDC, m << 8)
 
 #define VID ((volatile char far *)MK_FP(0xa000, 0))
 #define WVID ((volatile int far *)MK_FP(0xa000, 0))