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SA9200: Add YUV blitting, do full-screen updates more efficiently and properly clip partial updates. Plugin struct becomes incompatible for this target but leave version alone since it's still dev-only.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29028 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2011-01-11 01:21:31 +00:00
parent 2e686eca63
commit 0dd74ca722
6 changed files with 690 additions and 18 deletions
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111
firmware/target/arm/philips/sa9200/lcd-sa9200.c
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@ -97,9 +97,9 @@ static void lcd_send_data(unsigned data)
static void lcd_send_command(unsigned cmd)
{
lcd_wait_write();
LCD1_CMD = cmd >> 8;
LCD1_CMD = 0;
lcd_wait_write();
LCD1_CMD = cmd & 0xff;
LCD1_CMD = cmd;
}
static void lcd_write_reg(unsigned reg, unsigned data)
@ -401,25 +401,101 @@ void lcd_yuv_set_options(unsigned options)
}
/* Performance function to blit a YUV bitmap directly to the LCD */
void lcd_write_yuv420_lines(unsigned char const * const src[3],
int width,
int stride);
void lcd_write_yuv420_lines_odither(unsigned char const * const src[3],
int width,
int stride,
int x_screen,
int y_screen);
void lcd_blit_yuv(unsigned char * const src[3],
int src_x, int src_y, int stride,
int x, int y, int width, int height)
{
(void)src;
(void)src_x;
(void)src_y;
(void)stride;
(void)x;
(void)y;
(void)width;
(void)height;
const unsigned char *yuv_src[3];
const unsigned char *ysrc_max;
int options;
if (!display_on)
return;
width &= ~1;
height &= ~1;
/* calculate the drawing region */
lcd_write_reg(R_VERT_RAM_ADDR_POS, ((x + width - 1) << 8) | x);
/* convert YUV coordinates to screen coordinates */
y = LCD_WIDTH - 1 - y;
/* 2px strip: cursor moves left, then down in gram */
/* BGR=1, MDT1-0=00, I/D1-0=10, AM=0 */
lcd_write_reg(R_ENTRY_MODE, 0x1020);
yuv_src[0] = src[0] + src_y * stride + src_x;
yuv_src[1] = src[1] + (src_y * stride >> 2) + (src_x >> 1);
yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
ysrc_max = yuv_src[0] + height * stride;
/* cache options setting */
options = lcd_yuv_options;
do
{
/* max horiz << 8 | start horiz */
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (y << 8) | (y - 1));
/* position cursor (set AD0-AD15) */
lcd_write_reg(R_RAM_ADDR_SET, (x << 8) | y);
/* start drawing */
lcd_send_command(R_WRITE_DATA_2_GRAM);
if (options & LCD_YUV_DITHER)
{
lcd_write_yuv420_lines_odither(yuv_src, width, stride,
y, x);
}
else
{
lcd_write_yuv420_lines(yuv_src, width, stride);
}
y -= 2; /* move strip by "down" 2 px */
yuv_src[0] += stride << 1;
yuv_src[1] += stride >> 1;
yuv_src[2] += stride >> 1;
}
while (yuv_src[0] < ysrc_max);
/* back to normal right, then down cursor in gram */
/* BGR=1, MDT1-0=00, I/D1-0=11, AM=0 */
lcd_write_reg(R_ENTRY_MODE, 0x1030);
}
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void)
{
lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
const fb_data *addr, *end;
if (!display_on)
return;
addr = &lcd_framebuffer[0][0];
end = &lcd_framebuffer[LCD_HEIGHT - 1][LCD_WIDTH];
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (LCD_WIDTH - 1) << 8);
lcd_write_reg(R_VERT_RAM_ADDR_POS, (LCD_HEIGHT - 1) << 8);
lcd_write_reg(R_RAM_ADDR_SET, 0);
lcd_send_command(R_WRITE_DATA_2_GRAM);
do
{
lcd_send_data(*addr++);
}
while (addr < end);
}
/* Update a fraction of the display. */
@ -432,18 +508,23 @@ void lcd_update_rect(int x, int y, int width, int height)
if (x + width > LCD_WIDTH)
width = LCD_WIDTH - x;
if (x < 0)
width += x, x = 0;
if (width <= 0)
return; /* Nothing left to do. */
if (y + height > LCD_HEIGHT)
height = LCD_HEIGHT - y;
if ((width <= 0) || (height <= 0))
if (y < 0)
height += y, y = 0;
if (height <= 0)
return; /* Nothing left to do. */
addr = &lcd_framebuffer[y][x];
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, ((x + width - 1) << 8) | x);
lcd_write_reg(R_VERT_RAM_ADDR_POS, ((y + height -1) << 8) | y);
lcd_write_reg(R_RAM_ADDR_SET, ((y & 0xff) << 8) | (x & 0xff));
lcd_write_reg(R_VERT_RAM_ADDR_POS, ((y + height - 1) << 8) | y);
lcd_write_reg(R_RAM_ADDR_SET, (y << 8) | x);
lcd_send_command(R_WRITE_DATA_2_GRAM);
do {