Various improvements and code re-organisation: Optimised assembler LCD rendering function for the iPod 5G by me and an optimisations to the sprite drawing routines courtesy of stripwax (these improvements make pacbox almost realtime on the iPod 5G). MENU+SELECT now brings up the menu on the iPod instead of the hold switch.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9018 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 105 insertions, 0 deletions

diff --git a/apps/plugins/pacbox/pacbox_lcd.c b/apps/plugins/pacbox/pacbox_lcd.c
new file mode 100644
index 0000000000..83931b1b68
--- /dev/null
+++ b/apps/plugins/pacbox/pacbox_lcd.c
@@ -0,0 +1,105 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Pacbox - a Pacman Emulator for Rockbox
+ *
+ * Based on PIE - Pacman Instructional Emulator
+ *
+ * Copyright (c) 1997-2003,2004 Alessandro Scotti
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "pacbox.h"
+#include "pacbox_lcd.h"
+#include "arcade.h"
+#include "hardware.h"
+
+void blit_display(fb_data* lcd_framebuffer, unsigned char* vbuf)
+{
+    fb_data* dst;
+    fb_data* next_dst;
+    int x,y;
+
+#ifdef HAVE_LCD_COLOR
+#if (LCD_WIDTH >= 224) && (LCD_HEIGHT >= 288)
+        /* Native resolution = 224x288 */
+        (void)next_dst;
+        dst=&lcd_framebuffer[YOFS*LCD_WIDTH+XOFS];
+        for (y=0;y<ScreenHeight;y++) {
+            for (x=0;x<ScreenWidth;x++) {
+                *(dst++) = palette[*(vbuf++)];
+            }
+            dst += XOFS*2;
+        }
+#elif (LCD_WIDTH >= 288) && (LCD_HEIGHT >= 224)
+        /* Native resolution - rotated 90 degrees = 288x224 */
+        next_dst=&lcd_framebuffer[YOFS*LCD_WIDTH+XOFS+ScreenHeight-1];
+        for( y=ScreenHeight-1; y>=0; y-- ) {
+            dst = (next_dst--);
+            for( x=0; x<ScreenWidth; x++ ) {
+                *dst = palette[*(vbuf++)];
+                dst+=LCD_WIDTH;
+            }
+        }
+#elif (LCD_WIDTH >= 216) && (LCD_HEIGHT >= 168)
+        /* 0.75 scaling - display 3 out of 4 pixels = 216x168 
+           Skipping pixel #2 out of 4 seems to give the most legible display 
+         */
+        next_dst=&lcd_framebuffer[YOFS*LCD_WIDTH+XOFS+((ScreenHeight*3)/4)-1];
+        for (y=ScreenHeight-1;y >= 0; y--) {
+            if ((y & 3) != 1) {
+                dst = (next_dst--);
+                for (x=0;x<ScreenWidth;x++) {
+                    if ((x & 3) == 1) { vbuf++; }
+                    else {
+                       *dst = palette[*(vbuf++)];
+                       dst+=LCD_WIDTH;
+                    }
+                }
+            } else {
+                vbuf+=ScreenWidth;
+            }
+        }
+#elif (LCD_WIDTH >= 144) && (LCD_HEIGHT >= 112)
+        /* 0.5 scaling - display every other pixel = 144x112 */
+        next_dst=&lcd_framebuffer[YOFS*LCD_WIDTH+XOFS+ScreenHeight/2-1];
+        for (y=(ScreenHeight/2)-1;y >= 0; y--) {
+            dst = (next_dst--);
+            for (x=0;x<ScreenWidth/2;x++) {
+                *dst = palette[*(vbuf)];
+                vbuf+=2;
+                dst+=LCD_WIDTH;
+            }
+            vbuf+=ScreenWidth;
+        }
+#endif
+#else  /* Greyscale LCDs */
+#if (LCD_WIDTH >= 144) && (LCD_HEIGHT >= 112)
+#if LCD_PIXELFORMAT == VERTICAL_PACKING
+        /* 0.5 scaling - display every other pixel = 144x112 */
+        next_dst=&lcd_framebuffer[YOFS/4*LCD_WIDTH+XOFS+ScreenHeight/2-1];
+        for (y=(ScreenHeight/2)-1;y >= 0; y--) {
+            dst = (next_dst--);
+            for (x=0;x<ScreenWidth/8;x++) {
+                *dst = (palette[*(vbuf+6)]<<6) | (palette[*(vbuf+4)] << 4) | (palette[*(vbuf+2)] << 2) | palette[*(vbuf)];
+                vbuf+=8;
+                dst+=LCD_WIDTH;
+            }
+            vbuf+=ScreenWidth;
+        }
+#endif /* Vertical Packing */
+#endif /* Size >= 144x112 */
+#endif /* Not Colour */
+}