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FS#10118 & FS#10165 : lcd_blit_yuv() for Sansa Fuze & Sansa e200v2

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20919 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rafaël Carré 2009-05-12 13:22:39 +00:00
parent f2c18d6922
commit b1d03ccee7
8 changed files with 681 additions and 51 deletions
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121
firmware/target/arm/as3525/sansa-fuze/lcd-fuze.c
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@ -37,7 +37,9 @@
#define R_WRITE_DATA_2_GRAM 0x22
#define R_ENTRY_MODE_HORZ 0x7030
#define R_ENTRY_MODE_VERT 0x7038
static unsigned lcd_yuv_options SHAREDBSS_ATTR = 0;
static bool display_on = false; /* is the display turned on? */
static bool display_flipped = false;
static int xoffset = 20; /* needed for flip */
@ -189,7 +191,7 @@ void lcd_enable(bool on)
* avoid irritating flash on backlight on */
while(delay--);
lcd_activation_call_hook();
}
else
{
@ -210,22 +212,94 @@ bool lcd_active(void)
/*** update functions ***/
/* Performance function to blit a YUV bitmap directly to the LCD
* src_x, src_y, width and height should be even
* x, y, width and height have to be within LCD bounds
*/
/* Set horizontal window addresses */
static void lcd_window_x(int xmin, int xmax)
{
xmin += xoffset;
xmax += xoffset;
lcd_write_reg(0x46, (xmax << 8) | xmin);
lcd_write_reg(0x20, xmin);
}
/* Set vertical window addresses */
static void lcd_window_y(int ymin, int ymax)
{
lcd_write_reg(0x47, ymax);
lcd_write_reg(0x48, ymin);
lcd_write_reg(0x21, ymin);
}
void lcd_yuv_set_options(unsigned options)
{
lcd_yuv_options = options;
}
/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
extern void lcd_write_yuv420_lines(unsigned char const * const src[3],
int width,
int stride);
extern void lcd_write_yuv420_lines_odither(unsigned char const * const src[3],
int width,
int stride,
int x_screen, /* To align dither pattern */
int y_screen);
/* Performance function to blit a YUV bitmap directly to the LCD */
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;
unsigned char const * yuv_src[3];
off_t z;
lcd_busy = true;
lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_VERT);
/* Sorry, but width and height must be >= 2 or else */
width &= ~1;
height >>= 1;
z = stride*src_y;
yuv_src[0] = src[0] + z + src_x;
yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
lcd_window_x(x, x + width - 1);
if (lcd_yuv_options & LCD_YUV_DITHER)
{
do
{
lcd_window_y(y, y + 1);
/* Start write to GRAM */
lcd_write_cmd(R_WRITE_DATA_2_GRAM);
lcd_write_yuv420_lines_odither(yuv_src, width, stride, x, y);
yuv_src[0] += stride << 1; /* Skip down two luma lines */
yuv_src[1] += stride >> 1; /* Skip down one chroma line */
yuv_src[2] += stride >> 1;
y += 2;
}
while (--height > 0);
}
else
{
do
{
lcd_window_y(y, y + 1);
/* Start write to GRAM */
lcd_write_cmd(R_WRITE_DATA_2_GRAM);
lcd_write_yuv420_lines(yuv_src, width, stride);
yuv_src[0] += stride << 1; /* Skip down two luma lines */
yuv_src[1] += stride >> 1; /* Skip down one chroma line */
yuv_src[2] += stride >> 1;
y += 2;
}
while (--height > 0);
}
lcd_busy = false;
}
void lcd_init_device()
@ -242,23 +316,6 @@ void lcd_init_device()
_display_on();
}
/* Set horizontal window addresses */
void lcd_window_x(int xmin, int xmax)
{
xmin += xoffset;
xmax += xoffset;
lcd_write_reg(0x46, (xmax << 8) | xmin);
lcd_write_reg(0x20, xmin);
}
/* Set vertical window addresses */
void lcd_window_y(int ymin, int ymax)
{
lcd_write_reg(0x47, ymax);
lcd_write_reg(0x48, ymin);
lcd_write_reg(0x21, ymin);
}
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void)
@ -272,7 +329,7 @@ void lcd_update(void)
lcd_window_x(0, LCD_WIDTH - 1);
lcd_window_y(0, LCD_HEIGHT - 1);
/* Start write to GRAM */
/* Start write to GRAM */
lcd_write_cmd(R_WRITE_DATA_2_GRAM);
/* Write data */
@ -313,7 +370,7 @@ void lcd_update_rect(int x, int y, int width, int height)
lcd_window_x(x, xmax);
lcd_window_y(y, ymax);
/* Start write to GRAM */
/* Start write to GRAM */
lcd_write_cmd(R_WRITE_DATA_2_GRAM);
ptr = (unsigned short *)&lcd_framebuffer[y][x];