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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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168
firmware/asm/lcd-as-memframe.c
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@ -9,3 +9,171 @@ void lcd_copy_buffer_rect(fb_data *dst, fb_data *src, int width, int height)
dst += LCD_WIDTH;
} while (--height);
}
#define YFAC (74)
#define RVFAC (101)
#define GUFAC (-24)
#define GVFAC (-51)
#define BUFAC (128)
static inline int clamp(int val, int min, int max)
{
if (val < min)
val = min;
else if (val > max)
val = max;
return val;
}
extern void lcd_write_yuv420_lines(fb_data *dst,
unsigned char const * const src[3],
int width,
int stride)
{
/* Draw a partial YUV colour bitmap - similiar behavior to lcd_blit_yuv
in the core */
const unsigned char *ysrc, *usrc, *vsrc;
fb_data *row_end;
/* width and height must be >= 2 and an even number */
width &= ~1;
#if LCD_WIDTH >= LCD_HEIGHT
row_end = dst + width;
#else
row_end = dst + LCD_WIDTH * width;
#endif
ysrc = src[0];
usrc = src[1];
vsrc = src[2];
/* stride => amount to jump from end of last row to start of next */
stride -= width;
/* upsampling, YUV->RGB conversion and reduction to RGB in one go */
do
{
int y, cb, cr, rv, guv, bu, r, g, b;
y = YFAC*(*ysrc++ - 16);
cb = *usrc++ - 128;
cr = *vsrc++ - 128;
rv = RVFAC*cr;
guv = GUFAC*cb + GVFAC*cr;
bu = BUFAC*cb;
r = y + rv;
g = y + guv;
b = y + bu;
if ((unsigned)(r | g | b) > 64*256-1)
{
r = clamp(r, 0, 64*256-1);
g = clamp(g, 0, 64*256-1);
b = clamp(b, 0, 64*256-1);
}
*dst = FB_RGBPACK(r >> 6, g >> 6, b >> 6);
#if LCD_WIDTH >= LCD_HEIGHT
dst++;
#else
dst += LCD_WIDTH;
#endif
y = YFAC*(*ysrc++ - 16);
r = y + rv;
g = y + guv;
b = y + bu;
if ((unsigned)(r | g | b) > 64*256-1)
{
r = clamp(r, 0, 64*256-1);
g = clamp(g, 0, 64*256-1);
b = clamp(b, 0, 64*256-1);
}
*dst = FB_RGBPACK(r >> 6, g >> 6, b >> 6);
#if LCD_WIDTH >= LCD_HEIGHT
dst++;
#else
dst += LCD_WIDTH;
#endif
}
while (dst < row_end);
ysrc += stride;
usrc -= width >> 1;
vsrc -= width >> 1;
#if LCD_WIDTH >= LCD_HEIGHT
row_end += LCD_WIDTH;
dst += LCD_WIDTH - width;
#else
row_end -= 1;
dst -= LCD_WIDTH*width + 1;
#endif
do
{
int y, cb, cr, rv, guv, bu, r, g, b;
y = YFAC*(*ysrc++ - 16);
cb = *usrc++ - 128;
cr = *vsrc++ - 128;
rv = RVFAC*cr;
guv = GUFAC*cb + GVFAC*cr;
bu = BUFAC*cb;
r = y + rv;
g = y + guv;
b = y + bu;
if ((unsigned)(r | g | b) > 64*256-1)
{
r = clamp(r, 0, 64*256-1);
g = clamp(g, 0, 64*256-1);
b = clamp(b, 0, 64*256-1);
}
*dst = FB_RGBPACK(r >> 6, g >> 6, b >> 6);
#if LCD_WIDTH >= LCD_HEIGHT
dst++;
#else
dst += LCD_WIDTH;
#endif
y = YFAC*(*ysrc++ - 16);
r = y + rv;
g = y + guv;
b = y + bu;
if ((unsigned)(r | g | b) > 64*256-1)
{
r = clamp(r, 0, 64*256-1);
g = clamp(g, 0, 64*256-1);
b = clamp(b, 0, 64*256-1);
}
*dst = FB_RGBPACK(r >> 6, g >> 6, b >> 6);
#if LCD_WIDTH >= LCD_HEIGHT
dst++;
#else
dst += LCD_WIDTH;
#endif
}
while (dst < row_end);
}
void lcd_write_yuv420_lines_odither(fb_data *dst,
unsigned char const * const src[3],
int width, int stride,
int x_screen, int y_screen)
__attribute__((alias("lcd_write_yuv420_lines")));