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~2% performance improvement and some code cleanups for ipod video lcd update

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8953 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Brandon Low 2006-03-08 04:14:30 +00:00
parent 10e7e22452
commit 9d75acbaf7
1 changed files with 35 additions and 30 deletions
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65
firmware/drivers/lcd-ipodvideo.c
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@ -137,28 +137,21 @@ extern void _HD_ARM_Update5G (fb_data *fb, int x, int y, int w, int h);
void lcd_update_rect(int x, int y, int width, int height) ICODE_ATTR;
void lcd_update_rect(int x, int y, int width, int height)
{
int rect1,rect2,rect3,rect4;
int newx,newwidth;
int count;
int c, r;
unsigned int data;
unsigned short *src;
static int finishup_needed = 0;
/* Ensure x and width are both even - so we can read 32-bit aligned
data from lcd_framebuffer */
newx=x&~1;
newwidth=width&~1;
if (newx+newwidth < x+width) { newwidth+=2; }
x=newx; width=newwidth;
/* calculate the drawing region */
rect1 = x; /* start horiz */
rect2 = y; /* start vert */
rect3 = (x + width) - 1; /* max horiz */
rect4 = (y + height) - 1; /* max vert */
{
int endy = x + width;
/* Ensure x and width are both even - so we can read 32-bit aligned
data from lcd_framebuffer */
x &= ~1;
width &= ~1;
if (x + width < endy) {
width += 2;
}
}
if (finishup_needed) {
unsigned int data;
/* Bottom-half of original lcd_bcm_finishup() function */
do {
/* This function takes about 14ms to execute - so we yield() */
@ -169,12 +162,18 @@ void lcd_update_rect(int x, int y, int width, int height)
lcd_bcm_read32(0x1FC);
{
int rect1, rect2, rect3, rect4;
int count = (width * height) << 1;
/* calculate the drawing region */
rect1 = x; /* start horiz */
rect2 = y; /* start vert */
rect3 = (x + width) - 1; /* max horiz */
rect4 = (y + height) - 1; /* max vert */
/* setup the drawing region */
count=(width * height) << 1;
lcd_bcm_setup_rect(0x34, rect1, rect2, rect3, rect4, count);
src = (unsigned short*)&lcd_framebuffer[y][x];
/* setup the drawing region */
lcd_bcm_setup_rect(0x34, rect1, rect2, rect3, rect4, count);
}
/* write out destination address as two 16bit values */
outw((0xE0020 & 0xffff), 0x30010000);
@ -183,14 +182,20 @@ void lcd_update_rect(int x, int y, int width, int height)
/* wait for it to be write ready */
while ((inw(0x30030000) & 0x2) == 0);
for (r = 0; r < height; r++) {
/* for each column */
for (c = 0; c < width; c+=2) {
/* write out two pixels */
outw(*(src++), 0x30000000);
outw(*(src++), 0x30000000);
{
int r;
int line_size = (LCD_WIDTH - width);
unsigned short *src = (unsigned short*)&lcd_framebuffer[y][x];
for (r = 0; r < height; r++) {
/* for each column */
unsigned short *end = src + width;
while (src < end) {
/* write out two pixels */
outw(*(src++), 0x30000000);
outw(*(src++), 0x30000000);
}
src += line_size;
}
src += (LCD_WIDTH - width);
}
/* Top-half of original lcd_bcm_finishup() function */