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Implement lcd_update_rect()

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22924 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Chapman 2009-10-04 17:32:51 +00:00
parent 45c411e6c8
commit b349d8b0ea
1 changed files with 47 additions and 6 deletions
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53
firmware/target/arm/s5l8700/ipodnano2g/lcd-nano2g.c
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@ -205,13 +205,54 @@ void lcd_update(void)
void lcd_update_rect(int, int, int, int) ICODE_ATTR;
void lcd_update_rect(int x, int y, int width, int height)
{
(void)x;
(void)y;
(void)width;
(void)height;
int xx,yy;
int y0, x0, y1, x1;
fb_data* p;
fb_data pixel;
/* TODO. For now, just do a full-screen update */
lcd_update();
x0 = x; /* start horiz */
y0 = y; /* start vert */
x1 = (x + width) - 1; /* max horiz */
y1 = (y + height) - 1; /* max vert */
if (lcd_type==0) {
s5l_lcd_write_cmd_data(R_HORIZ_ADDR_START_POS, x0);
s5l_lcd_write_cmd_data(R_HORIZ_ADDR_END_POS, x1);
s5l_lcd_write_cmd_data(R_VERT_ADDR_START_POS, y0);
s5l_lcd_write_cmd_data(R_VERT_ADDR_END_POS, y1);
s5l_lcd_write_cmd_data(R_HORIZ_GRAM_ADDR_SET, (x1 << 8) | x0);
s5l_lcd_write_cmd_data(R_VERT_GRAM_ADDR_SET, (y1 << 8) | y0);
s5l_lcd_write_cmd(0);
s5l_lcd_write_cmd(R_WRITE_DATA_TO_GRAM);
} else {
s5l_lcd_write_cmd(R_COLUMN_ADDR_SET);
s5l_lcd_write_data(x0); /* Start column */
s5l_lcd_write_data(x1); /* End column */
s5l_lcd_write_cmd(R_ROW_ADDR_SET);
s5l_lcd_write_data(y0); /* Start row */
s5l_lcd_write_data(y1); /* End row */
s5l_lcd_write_cmd(R_MEMORY_WRITE);
}
/* Copy display bitmap to hardware */
p = &lcd_framebuffer[y0][x0];
yy = height;
for (yy = y0; yy <= y1; yy++) {
for (xx = x0; xx <= x1; xx++) {
pixel = *(p++);
while (LCD_STATUS & 0x10);
LCD_WDATA = (pixel & 0xff00) >> 8;
while (LCD_STATUS & 0x10);
LCD_WDATA = pixel & 0xff;
}
p += LCD_WIDTH - width;
}
}
/* Performance function to blit a YUV bitmap directly to the LCD */