WWLCDPanel has two bitmap data, and the bitmap once drawn is

Fixed not to draw.  Reduced the load on the X server.
(Improvements related to WWLCDPanel and XDisplay_DrawLCDWindow () of XDisplay.c)
(XDisplay_DrawLCDWindow () in XDisplay.c has useless malloc ()
Improvement is necessary of that)

In WWDisplay.c (WWDisplay_DrawScreen ()) of wonx-a 05 and wonx-a 06
As a result of trying both, wonx - a 05 was faster, so wonx - a 05 was better
I decided to use it.

Version 0.0.7 alpha - from wonx-a07.tar.gz

HISTORY

@@ -1,3 +1,46 @@
+2000/10/5(<28><>)
+
+wonx-a07 <20><><EFBFBD><EFBFBD>
+
+WWLCDPanel <20>˥ӥåȥޥåץǡ<D7A5><C7A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>褷<EFBFBD><E8A4B7><EFBFBD>ӥåȥޥåפ<C3A5>
+<EFBFBD><EFBFBD><EFBFBD>褷<EFBFBD>ʤ<EFBFBD><EFBFBD>褦<EFBFBD>˽<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>X<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ф<EFBFBD><EFBFBD><EFBFBD><EFBFBD>٤򸺤餷<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+(WWLCDPanel<65><6C>Ϣ<EFBFBD>ȡ<EFBFBD>XDisplay.c <20><> XDisplay_DrawLCDWindow() <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)
+(XDisplay.c <20><> XDisplay_DrawLCDWindow() <20>ˤϡ<CBA4>̵<EFBFBD>̤<EFBFBD> malloc() <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Τǡ<CEA4>
+ <20><><EFBFBD>Τ<EFBFBD><CEA4><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɤ<EFBFBD>ɬ<EFBFBD><C9AC>)
+
+wonx-a05 <20><> wonx-a06 <20><> WWDisplay.c (WWDisplay_DrawScreen()) <20><>
+ξ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̡<EFBFBD>wonx-a05 <20>Τۤ<CEA4><DBA4><EFBFBD><EFBFBD><EFBFBD>®<EFBFBD><C2AE><EFBFBD>ä<EFBFBD><C3A4>Τǡ<CEA4>wonx-a05 <20>Τۤ<CEA4><DBA4><EFBFBD>
+<EFBFBD><EFBFBD><EFBFBD>Ѥ<EFBFBD><EFBFBD>뤳<EFBFBD>Ȥˤ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+
+
+
+
+2000/10/4(<28><>)
+
+wonx-a06 <20><><EFBFBD><EFBFBD>
+
+WWDisplay_DrawScreen() <20>Υ<EFBFBD><CEA5>르<EFBFBD>ꥺ<EFBFBD><EAA5BA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˽<EFBFBD><CBBD><EFBFBD><EFBFBD><EFBFBD>
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƹ<EFBFBD>®<EFBFBD>ˤʤ<EFBFBD><EFBFBD>ʤ<EFBFBD><EFBFBD>ä<EFBFBD><EFBFBD><EFBFBD>X <20><><EFBFBD><EFBFBD><EFBFBD>Ф<EFBFBD><D0A4><EFBFBD><EFBFBD>褬<EFBFBD>ۥåȥ<C3A5><C8A5>ݥåȤˤʤäƤ<C3A4><C6A4><EFBFBD><EFBFBD><EFBFBD>
+<EFBFBD>פ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Τǡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̤򸺤餹<EFBFBD><EFBFBD><EFBFBD>Ϥ<EFBFBD>ɬ<EFBFBD>ס<EFBFBD>
+
+
+
+
+2000/10/3(<28><>)
+
+wonx-a05 <20><><EFBFBD><EFBFBD>
+
+XDisplay_DrawLCDWindow() <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̵<EFBFBD>̤ʷ׻<CAB7><D7BB><EFBFBD><EFBFBD>롼<EFBFBD>׳<EFBFBD><D7B3>˽Ф<CBBD><D0A4><EFBFBD><EFBFBD><EFBFBD>
+
+WWDisplay_DrawScreen() <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̵<EFBFBD>̤ʷ׻<CAB7><D7BB><EFBFBD><EFBFBD>롼<EFBFBD>׳<EFBFBD><D7B3>˽Ф<CBBD><D0A4><EFBFBD><EFBFBD><EFBFBD>
+
+<EFBFBD>ۥåȥ<EFBFBD><EFBFBD>ݥåȤ<EFBFBD>Ĵ<EFBFBD>٤<EFBFBD><EFBFBD>顤X<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʬ(XDisplay.c <20><> XDisplay_DrawLCDWindow()<29><>
+<EFBFBD>롼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʬ)<29><><EFBFBD>ۥåȥ<C3A5><C8A5>ݥåȤˤʤäƤ<C3A4><C6A4><EFBFBD><EFBFBD>Τǡ<CEA4><C7A1>ԥ<EFBFBD><D4A5><EFBFBD><EFBFBD>뤴<EFBFBD>Ȥ<EFBFBD><C8A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+<EFBFBD><EFBFBD><EFBFBD>äơ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>®<EFBFBD>٤<EFBFBD><EFBFBD>夲<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+
+
+
+
 2000/9/30(<28><>)
 
 wonx-a04 <20><><EFBFBD><EFBFBD>

Makefile

@@ -2,8 +2,8 @@ XINCLUDEDIR = /usr/X11R6/include
 INCLUDEDIR = .
 XLIBDIR = /usr/X11R6/lib
 
-VERSION = Wonx-a04
-PKGNAME = wonx-a04
+VERSION = Wonx-a07
+PKGNAME = wonx-a07
 
 OBJS = WWCharacter.o WWColorMap.o WWDisplay.o WWLCDPanel.o WWPalette.o WWScreen.o WWSprite.o WonxDisplay.o XDisplay.o bank.o comm.o disp.o text.o key.o sound.o system.o timer.o etc.o wonx.o
 

WWDisplay.c

@@ -243,15 +243,17 @@ static int WWDisplay_DrawScreen(WWDisplay display, WWScreen screen)
   /* <20><><EFBFBD><EFBFBD><EFBFBD>ۤ<EFBFBD><DBA4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>                                           */
 
   for (y = 0; y < lcd_panel_height; y++) {
+
+    if (mode == WWSCREEN_INSIDE_ONLY) {
+      if (y > ey) { break; }
+      if (y < sy) { y = sy - 1; continue; }
+    }
+
+    py = y + WWScreen_GetRollY(screen);
+
     for (x = 0; x < lcd_panel_width; x++) {
-      px = x + WWScreen_GetRollX(screen);
-      py = y + WWScreen_GetRollY(screen);
 
       if (mode == WWSCREEN_INSIDE_ONLY) {
-	if (y > ey) {
-	  x = lcd_panel_width - 1; y = lcd_panel_height - 1; continue;
-	}
-	if (y < sy) { x = lcd_panel_width - 1; y = sy - 1; continue; }
 	if (x > ex) { x = lcd_panel_width - 1; continue; }
 	if (x < sx) { x = sx - 1; continue; }
       } else if (mode == WWSCREEN_OUTSIDE_ONLY) {
@@ -261,6 +263,8 @@ static int WWDisplay_DrawScreen(WWDisplay display, WWScreen screen)
 	}
       }
 
+      px = x + WWScreen_GetRollX(screen);
+
       pixel = WWScreen_GetPixel(screen, px, py);
 
       /* Ʃ<><C6A9><EFBFBD><EFBFBD><EFBFBD>ξ<EFBFBD><CEBE><EFBFBD> */
@@ -335,7 +339,7 @@ int WWDisplay_DrawLCDPanel(WWDisplay display)
   WWSprite sprite;
 
   lcd_panel = WWDisplay_GetLCDPanel(display);
-  lcd_panel_width = WWLCDPanel_GetWidth(lcd_panel);
+  lcd_panel_width  = WWLCDPanel_GetWidth( lcd_panel);
   lcd_panel_height = WWLCDPanel_GetHeight(lcd_panel);
   color_map = WWDisplay_GetColorMap(display);
   border = WWDisplay_GetBorder(display);

WWLCDPanel.c

@@ -13,52 +13,95 @@ int WWLCDPanel_GetHeight(WWLCDPanel p) { return (p->height); }
 int WWLCDPanel_SetWidth( WWLCDPanel p, int n) { return (p->width  = n); }
 int WWLCDPanel_SetHeight(WWLCDPanel p, int n) { return (p->height = n); }
 
-unsigned char * WWLCDPanel_GetPixelMap(WWLCDPanel p) { return (p->pixel); }
+int WWLCDPanel_ResetCurrent(WWLCDPanel p)
+{
+  return (p->current = 0);
+}
+
+int WWLCDPanel_ReverseCurrent(WWLCDPanel p)
+{
+  return (p->current = 1 - p->current);
+}
+
+int WWLCDPanel_ResetAllDraw(WWLCDPanel p) { return (p->all_draw = 0); }
+int WWLCDPanel_SetAllDraw(WWLCDPanel p)   { return (p->all_draw = 1); }
+int WWLCDPanel_IsAllDraw(WWLCDPanel p)   { return (p->all_draw); }
+
+unsigned char * WWLCDPanel_GetPixelMap(WWLCDPanel p)
+{
+  return (p->pixel[p->current]);
+}
 
 /* LCD<43>ϣ<EFBFBD><CFA3>ԥ<EFBFBD><D4A5><EFBFBD><EFBFBD><EFBFBD>16<31><36>(<28><><EFBFBD>ӥå<D3A5>ɬ<EFBFBD><C9AC>) */
-int WWLCDPanel_GetPixel(WWLCDPanel lcd_panel, int x, int y)
+static int WWLCDPanel_GetPixelByCurrent(WWLCDPanel lcd_panel, int current,
+					int x, int y)
 {
   unsigned char pixel;
 
-  if ( (x < 0) || (x > WWLCDPanel_GetWidth(lcd_panel) - 1) ||
+  if ( (x < 0) || (x > WWLCDPanel_GetWidth( lcd_panel) - 1) ||
        (y < 0) || (y > WWLCDPanel_GetHeight(lcd_panel) - 1) )
     return (-1);
 
-  pixel = lcd_panel->pixel[y * WWLCDPanel_GetWidth(lcd_panel) + x];
+  pixel = lcd_panel->pixel[current][y * WWLCDPanel_GetWidth(lcd_panel) + x];
   pixel &= 0x0f;
   return ((int)pixel);
 }
 
+static int WWLCDPanel_GetOldPixel(WWLCDPanel lcd_panel, int x, int y)
+{
+  return (WWLCDPanel_GetPixelByCurrent(lcd_panel, 1 - lcd_panel->current, x, y));
+}
+
+int WWLCDPanel_GetPixel(WWLCDPanel lcd_panel, int x, int y)
+{
+  return (WWLCDPanel_GetPixelByCurrent(lcd_panel, lcd_panel->current, x, y));
+}
+
 int WWLCDPanel_SetPixel(WWLCDPanel lcd_panel, int x, int y, int pixel)
 {
   unsigned char p;
   int n;
 
-  if ( (x < 0) || (x > WWLCDPanel_GetWidth(lcd_panel) - 1) ||
+  if ( (x < 0) || (x > WWLCDPanel_GetWidth( lcd_panel) - 1) ||
        (y < 0) || (y > WWLCDPanel_GetHeight(lcd_panel) - 1) )
     return (-1);
 
   p = ((unsigned char)pixel) & 0x0f;
   n = y * WWLCDPanel_GetWidth(lcd_panel) + x;
-  lcd_panel->pixel[n] = p;
+  lcd_panel->pixel[lcd_panel->current][n] = p;
 
   return (pixel);
 }
 
+int WWLCDPanel_IsPixelChanged(WWLCDPanel lcd_panel, int x, int y)
+{
+  int old_pixel;
+  int current_pixel;
+
+  if (WWLCDPanel_IsAllDraw(lcd_panel)) return (1);
+  old_pixel = WWLCDPanel_GetOldPixel(lcd_panel, x, y);
+  current_pixel = WWLCDPanel_GetPixel(lcd_panel, x, y);
+
+  return (!(old_pixel == current_pixel));
+}
+
 WWLCDPanel WWLCDPanel_Create(int width, int height)
 {
   WWLCDPanel lcd_panel;
-  int x, y;
+  int x, y, i;
 
   lcd_panel = (WWLCDPanel)malloc(sizeof(_WWLCDPanel));
   if (lcd_panel == NULL) Error("WWLCDPanel_Create", "Cannot allocate memory.");
 
   WWLCDPanel_SetWidth( lcd_panel, width);
   WWLCDPanel_SetHeight(lcd_panel, height);
-  lcd_panel->pixel =
-    (unsigned char *)malloc(sizeof(unsigned char) *
-			    WWLCDPanel_GetWidth(lcd_panel) *
-			    WWLCDPanel_GetHeight(lcd_panel));
+
+  for (i = 0; i < 2; i++) {
+    lcd_panel->pixel[i] =
+      (unsigned char *)malloc(sizeof(unsigned char) *
+			      WWLCDPanel_GetWidth(lcd_panel) *
+			      WWLCDPanel_GetHeight(lcd_panel));
+  }
 
   for (y = 0; y < lcd_panel->height; y++) {
     for (x = 0; x < lcd_panel->width / 2; x++) {
@@ -66,13 +109,19 @@ WWLCDPanel WWLCDPanel_Create(int width, int height)
     }
   }
 
+  WWLCDPanel_ResetCurrent(lcd_panel);
+  WWLCDPanel_SetAllDraw(lcd_panel); /* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̤<EFBFBD><CCA4><EFBFBD><EFBFBD>褹<EFBFBD><E8A4B9> */
+
   return (lcd_panel);
 }
 
 WWLCDPanel WWLCDPanel_Destroy(WWLCDPanel lcd_panel)
 {
+  int i;
   if (lcd_panel == NULL) return (NULL);
-  if (lcd_panel->pixel) free(lcd_panel->pixel);
+  for (i = 0; i < 2; i++) {
+    if (lcd_panel->pixel[i]) free(lcd_panel->pixel[i]);
+  }
   free(lcd_panel);
   return (NULL);
 }

WWLCDPanel.h

@@ -21,9 +21,17 @@ int WWLCDPanel_GetWidth( WWLCDPanel p);
 int WWLCDPanel_GetHeight(WWLCDPanel p);
 int WWLCDPanel_SetWidth( WWLCDPanel p, int n);
 int WWLCDPanel_SetHeight(WWLCDPanel p, int n);
+
+int WWLCDPanel_ResetCurrent(WWLCDPanel p);
+int WWLCDPanel_ReverseCurrent(WWLCDPanel p);
+int WWLCDPanel_ResetAllDraw(WWLCDPanel p);
+int WWLCDPanel_SetAllDraw(WWLCDPanel p);
+int WWLCDPanel_IsAllDraw(WWLCDPanel p);
+
 unsigned char * WWLCDPanel_GetPixelMap(WWLCDPanel p);
 int WWLCDPanel_GetPixel(WWLCDPanel lcd_panel, int x, int y);
 int WWLCDPanel_SetPixel(WWLCDPanel lcd_panel, int x, int y, int pixel);
+int WWLCDPanel_IsPixelChanged(WWLCDPanel lcd_panel, int x, int y);
 WWLCDPanel WWLCDPanel_Create(int width, int height);
 WWLCDPanel WWLCDPanel_Destroy(WWLCDPanel lcd_panel);
 

WWLCDPanelP.h

@@ -14,8 +14,19 @@
 typedef struct _WWLCDPanel {
   int width;
   int height;
-  /* 16<31><36><EFBFBD>Υ<EFBFBD><CEA5>顼<EFBFBD><E9A1BC><EFBFBD>󡥣<EFBFBD><F3A1A5A3>Х<EFBFBD><D0A5>Ȥǣ<C8A4><C7A3>ԥ<EFBFBD><D4A5><EFBFBD><EFBFBD><EFBFBD>ʬ<EFBFBD>ξ<EFBFBD><CEBE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
-  unsigned char * pixel;
+
+  /* X<><58><EFBFBD><EFBFBD><EFBFBD>Ф<EFBFBD><D0A4><EFBFBD><EFBFBD>٤򸺤餹<F2B8BAA4><E9A4B9><EFBFBD>ᡤ<EFBFBD>ӥåȥޥåפ<C3A5><D7A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
+  /* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ʊ<EFBFBD><C6B1><EFBFBD><EFBFBD>ʬ<EFBFBD>Ͻ񤭴<CFBD><F1A4ADB4><EFBFBD><EFBFBD>ʤ<EFBFBD><CAA4>褦<EFBFBD>ˤ<EFBFBD><CBA4>롥            */
+  /* pixel[current] <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Υӥåȥޥåפˤʤ롥   */
+  /* pixel[1 - current] <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Υӥåȥޥåפˤʤ롥     */
+  int current;
+
+  /* all_draw == 1 <20>ΤȤ<CEA4><C8A4>ϡ<EFBFBD><CFA1><EFBFBD><EFBFBD><EFBFBD>ʬ<EFBFBD><CAAC>̵<EFBFBD><CCB5><EFBFBD>Τǡ<CEA4>          */
+  /* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>褹<EFBFBD>뤳<EFBFBD>Ȥ򼨤<C8A4><F2BCA8A4><EFBFBD>                            */
+  int all_draw;
+
+  /* 16<31><36><EFBFBD>Υ<EFBFBD><CEA5>顼<EFBFBD><E9A1BC><EFBFBD>󡥣<EFBFBD><F3A1A5A3>Х<EFBFBD><D0A5>Ȥǣ<C8A4><C7A3>ԥ<EFBFBD><D4A5><EFBFBD><EFBFBD><EFBFBD>ʬ<EFBFBD>ξ<EFBFBD><CEBE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
+  unsigned char * pixel[2];
 } _WWLCDPanel;
 
 /*****************************************************************************/

XDisplay.c

@@ -358,16 +358,27 @@ int XDisplay_Sync(XDisplay x_display)
 
 int XDisplay_DrawLCDWindow(XDisplay x_display, WWLCDPanel ww_lcd_panel)
 {
-  int x, y, n;
-  int px, py;
+  int x, y;
+  int px, py, ph;
   int num;
-  XRectangle * rectangles;
+  int n[16];
+  XRectangle * rectangles[16];
   int pixel;
   int ww_lcd_width, ww_lcd_height;
 
+  /* <20><><EFBFBD>ܤ<EFBFBD><DCA4>Ƥ<EFBFBD><C6A4><EFBFBD><EFBFBD>ԥ<EFBFBD><D4A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϤޤȤ<DEA4><C8A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD>褹<EFBFBD><E8A4B9><EFBFBD>Τǡ<CEA4><C7A1>ԥ<EFBFBD><D4A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>κ<EFBFBD><CEBA><EFBFBD><EFBFBD>ͤ<EFBFBD> */
+  /* <20>ǰ<EFBFBD><C7B0>ξ<EFBFBD><CEBE><EFBFBD>(<28>ʡ<EFBFBD><CAA1><EFBFBD><EFBFBD>ͤΤȤ<CEA4>)<29>ǡ<EFBFBD>width * height / 2 <20>ˤʤ롥        */
   num =
-    WWLCDPanel_GetHeight(ww_lcd_panel) * WWLCDPanel_GetWidth(ww_lcd_panel);
-  rectangles = (XRectangle *)malloc(sizeof(XRectangle) * num);
+    WWLCDPanel_GetHeight(ww_lcd_panel) * WWLCDPanel_GetWidth(ww_lcd_panel) / 2;
+
+  /*
+   * <20><><EFBFBD><EFBFBD> malloc() <20>ϡ<EFBFBD><CFA1>ºݤˤϥ<CBA4><CFA5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϤۤȤ<DBA4><C8A4>ɻ<EFBFBD><C9BB>Ѥ<EFBFBD><D1A4><EFBFBD><EFBFBD>Ƥ<EFBFBD><C6A4>ʤ<EFBFBD><CAA4>Τǡ<CEA4>
+   * <20><><EFBFBD>Τ<EFBFBD><CEA4><EFBFBD><EFBFBD>ʤ<EFBFBD><CAA4>Ȥ<EFBFBD><C8A4><EFBFBD><EFBFBD><EFBFBD>ɬ<EFBFBD>פ<EFBFBD><D7A4><EFBFBD><EFBFBD><EFBFBD>
+   */
+  for (pixel = 0; pixel < 16; pixel++) {
+    n[pixel] = 0;
+    rectangles[pixel] = (XRectangle *)malloc(sizeof(XRectangle) * num);
+  }
   if (rectangles == NULL)
     Error("XDisplay_DrawLCDWindow", "Cannot allocate memory.");
 
@@ -376,37 +387,42 @@ int XDisplay_DrawLCDWindow(XDisplay x_display, WWLCDPanel ww_lcd_panel)
 
   /* <20><><EFBFBD><EFBFBD><EFBFBD>ν<EFBFBD><CEBD><EFBFBD><EFBFBD>ϥۥåȥ<C3A5><C8A5>ݥåȤˤʤ<CBA4><CAA4>Τǡ<CEA4><C7A1>Τ<EFBFBD><CEA4>Τ<EFBFBD><CEA4>˥<EFBFBD><CBA5>塼<EFBFBD>˥󥰤<CBA5><F3A5B0A4>뤳<EFBFBD><EBA4B3> */
 
-  for (pixel = 0; pixel < 16; pixel++) {
-    n = 0;
-    for (y = 0; y < ww_lcd_height; y++) {
-      for (x = 0; x < ww_lcd_width; x++) {
-	if (pixel == WWLCDPanel_GetPixel(ww_lcd_panel, x, y)) {
-	  px = (x * x_display->width ) / ww_lcd_width;
-	  py = (y * x_display->height) / ww_lcd_height;
-	  rectangles[n].x = px;
-	  rectangles[n].y = py;
-	  rectangles[n].width  = (x+1) * x_display->width  / ww_lcd_width - px;
-	  rectangles[n].height = (y+1) * x_display->height / ww_lcd_height- py;
-
-	  /* <20><><EFBFBD>ܤ<EFBFBD><DCA4>Ƥ<EFBFBD>Ʊ<EFBFBD><C6B1><EFBFBD>Υԥ<CEA5><D4A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϡ<EFBFBD><CFA1><EFBFBD><EFBFBD>Ϥ<EFBFBD><CFA4>ä<EFBFBD><C3A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>褹<EFBFBD><E8A4B9> */
-	  x++;
-	  while ( (x < ww_lcd_width) &&
-		  (pixel == WWLCDPanel_GetPixel(ww_lcd_panel, x, y)) ) {
-	    rectangles[n].width = (x+1) * x_display->width / ww_lcd_width - px;
-	    x++;
-	  }
-	  x--;
-
-	  n++;
-	}
+  for (y = 0; y < ww_lcd_height; y++) {
+    py = (y * x_display->height) / ww_lcd_height;
+    ph = (y+1) * x_display->height / ww_lcd_height- py;
+    for (x = 0; x < ww_lcd_width; x++) {
+      if (!WWLCDPanel_IsPixelChanged(ww_lcd_panel, x, y)) {
+	continue;
       }
-    }
+      pixel = WWLCDPanel_GetPixel(ww_lcd_panel, x, y);
+      px = (x * x_display->width ) / ww_lcd_width;
+      rectangles[pixel][n[pixel]].x = px;
+      rectangles[pixel][n[pixel]].y = py;
+      rectangles[pixel][n[pixel]].width  =
+	(x+1) * x_display->width  / ww_lcd_width - px;
+      rectangles[pixel][n[pixel]].height = ph;
 
-    if (n > 0) {
+      /* <20><><EFBFBD>ܤ<EFBFBD><DCA4>Ƥ<EFBFBD>Ʊ<EFBFBD><C6B1><EFBFBD>Υԥ<CEA5><D4A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϡ<EFBFBD><CFA1><EFBFBD><EFBFBD>Ϥ<EFBFBD><CFA4>ä<EFBFBD><C3A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>褹<EFBFBD><E8A4B9> */
+      x++;
+      while ( (x < ww_lcd_width) &&
+	      (pixel == WWLCDPanel_GetPixel(ww_lcd_panel, x, y)) &&
+	      (WWLCDPanel_IsPixelChanged(ww_lcd_panel, x, y)) ) {
+	rectangles[pixel][n[pixel]].width =
+	  (x+1) * x_display->width / ww_lcd_width - px;
+	x++;
+      }
+      x--;
+
+      n[pixel]++;
+    }
+  }
+
+  for (pixel = 0; pixel < 16; pixel++) {
+    if (n[pixel] > 0) {
       XFillRectangles(x_display->display,
 		      x_display->lcd_pixmap,
 		      x_display->color_gc[pixel],
-		      rectangles, n);
+		      rectangles[pixel], n[pixel]);
     }
   }
 
@@ -414,9 +430,14 @@ int XDisplay_DrawLCDWindow(XDisplay x_display, WWLCDPanel ww_lcd_panel)
 	    x_display->lcd_window, x_display->copy_gc,
             0, 0, x_display->width, x_display->height, 0, 0);
 
+  WWLCDPanel_ResetAllDraw(ww_lcd_panel);
+  WWLCDPanel_ReverseCurrent(ww_lcd_panel);
+
   XDisplay_Sync(x_display);
 
-  free(rectangles);
+  for (pixel = 0; pixel < 16; pixel++) {
+    free(rectangles[pixel]);
+  }
 
   return (0);
 }