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Revert "Remove YUV blitting functions and LCD modes"

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This reverts commit fe6aa21e9e.

Change-Id: I8bb1e5d6c52ed1478002d2140ef494ec5d62b8e3
This commit is contained in:
Solomon Peachy 2022-10-13 11:03:53 -04:00
parent f9ea1fc79d
commit 418169aff8
54 changed files with 9638 additions and 3 deletions
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98
firmware/target/arm/as3525/sansa-e200v2/lcd-e200v2.c
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@ -336,6 +336,104 @@ bool lcd_active(void)
/*** update functions ***/
static unsigned lcd_yuv_options = 0;
void lcd_yuv_set_options(unsigned options)
{
lcd_yuv_options = options;
}
#ifndef BOOTLOADER
static void lcd_window_blit(int xmin, int ymin, int xmax, int ymax)
{
if (!display_flipped)
{
lcd_write_reg(R_HORIZ_RAM_ADDR_POS,
((LCD_WIDTH-1 - xmin) << 8) | (LCD_WIDTH-1 - xmax));
lcd_write_reg(R_VERT_RAM_ADDR_POS, (ymax << 8) | ymin);
lcd_write_reg(R_RAM_ADDR_SET,
(ymin << 8) | (LCD_WIDTH-1 - xmin));
}
else
{
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (xmax << 8) | xmin);
lcd_write_reg(R_VERT_RAM_ADDR_POS, (ymax << 8) | ymin);
lcd_write_reg(R_RAM_ADDR_SET, (ymax << 8) | xmin);
}
}
/* 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
* src_x, src_y, width and height should be even
* x, y, width and height have to be within LCD bounds
*/
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)
{
unsigned char const * yuv_src[3];
off_t z;
/* 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_write_reg(R_ENTRY_MODE,
display_flipped ? R_ENTRY_MODE_VIDEO_FLIPPED : R_ENTRY_MODE_VIDEO_NORMAL
);
if (lcd_yuv_options & LCD_YUV_DITHER)
{
do
{
lcd_window_blit(y, x, y+1, x+width-1);
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_blit(y, x, y+1, x+width-1);
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);
}
}
#endif
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void)