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emulator is a lot faster with my lcd_blit() function and yield() instead of sleep()

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4171 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jörg Hohensohn 2003-12-22 08:32:38 +00:00
parent 96147edb7d
commit d29d029569
1 changed files with 6 additions and 14 deletions
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20
apps/plugins/chip8.c
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@ -24,8 +24,7 @@
#ifdef HAVE_LCD_BITMAP
static struct plugin_api* rb; /* here is a global api struct pointer */
/* plugins have no framebuffer access, we need a copy */
unsigned char lcd_framebuf[8][64];
unsigned char lcd_framebuf[8][64]; /* frame buffer in hardware fomat */
typedef unsigned char byte; /* sizeof(byte)==1 */
typedef unsigned short word; /* sizeof(word)>=2 */
@ -344,10 +343,11 @@ static void chip8_update_display(void)
{
int x,y,i;
byte w;
byte* row;
// lcd_clear_display();
for (y=0;y<=7;++y) /* 32 rows */
{
row = lcd_framebuf[y];
for (x=0;x<64;++x) /* 64 columns */
{
w = 0;
@ -358,19 +358,11 @@ static void chip8_update_display(void)
{
w += 128+64;
}
lcd_framebuf[y][x] = w;
}
*row++ = w;
}
}
rb->lcd_bitmap(lcd_framebuf[0], 24, 0*8, 64, 8, true);
rb->lcd_bitmap(lcd_framebuf[1], 24, 1*8, 64, 8, true);
rb->lcd_bitmap(lcd_framebuf[2], 24, 2*8, 64, 8, true);
rb->lcd_bitmap(lcd_framebuf[3], 24, 3*8, 64, 8, true);
rb->lcd_bitmap(lcd_framebuf[4], 24, 4*8, 64, 8, true);
rb->lcd_bitmap(lcd_framebuf[5], 24, 5*8, 64, 8, true);
rb->lcd_bitmap(lcd_framebuf[6], 24, 6*8, 64, 8, true);
rb->lcd_bitmap(lcd_framebuf[7], 24, 7*8, 64, 8, true);
rb->lcd_update_rect(24,0,64,64);
rb->lcd_blit(lcd_framebuf[0], 24, 0, 64, 8, 64);
}
@ -432,7 +424,7 @@ static void chip8_execute(void)
/* Update the machine status */
chip8_update_display();
chip8_keyboard();
rb->sleep(HZ/70); /* ca. 70Hz */
rb->yield(); /* we should regulate the speed by timer query, sleep/yield */
for (i=key_pressed=0;i<16;++i) /* check if a key was first */
if (chip8_keys[i]) key_pressed=i+1; /* pressed */