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lcd_blit_yuv: move from sdl driver to lcd16bit-common

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Declare as weak, so it can be overridden by targets

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31127 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rafaël Carré 2011-12-03 21:39:33 +00:00
parent 1d81683e08
commit d7802133fd
2 changed files with 204 additions and 206 deletions
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205
firmware/target/hosted/sdl/lcd-bitmap.c
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@ -223,208 +223,3 @@ void sim_lcd_ex_update_rect(int x_start, int y_start, int width, int height)
}
}
#endif
#ifdef HAVE_LCD_COLOR
/**
* |R| |1.000000 -0.000001 1.402000| |Y'|
* |G| = |1.000000 -0.334136 -0.714136| |Pb|
* |B| |1.000000 1.772000 0.000000| |Pr|
* Scaled, normalized, rounded and tweaked to yield RGB 565:
* |R| |74 0 101| |Y' - 16| >> 9
* |G| = |74 -24 -51| |Cb - 128| >> 8
* |B| |74 128 0| |Cr - 128| >> 9
*/
#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;
}
void lcd_yuv_set_options(unsigned options)
{
(void)options;
}
/* Draw a partial YUV colour bitmap - similiar behavior to lcd_blit_yuv
in the core */
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)
{
const unsigned char *ysrc, *usrc, *vsrc;
int linecounter;
fb_data *dst, *row_end;
long z;
/* width and height must be >= 2 and an even number */
width &= ~1;
linecounter = height >> 1;
#if LCD_WIDTH >= LCD_HEIGHT
dst = &lcd_framebuffer[y][x];
row_end = dst + width;
#else
dst = &lcd_framebuffer[x][LCD_WIDTH - y - 1];
row_end = dst + LCD_WIDTH * width;
#endif
z = stride * src_y;
ysrc = src[0] + z + src_x;
usrc = src[1] + (z >> 2) + (src_x >> 1);
vsrc = src[2] + (usrc - src[1]);
/* stride => amount to jump from end of last row to start of next */
stride -= width;
/* upsampling, YUV->RGB conversion and reduction to RGB565 in one go */
do
{
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 = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
#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 = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
#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 = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
#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 = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
#if LCD_WIDTH >= LCD_HEIGHT
dst++;
#else
dst += LCD_WIDTH;
#endif
}
while (dst < row_end);
ysrc += stride;
usrc += stride >> 1;
vsrc += stride >> 1;
#if LCD_WIDTH >= LCD_HEIGHT
row_end += LCD_WIDTH;
dst += LCD_WIDTH - width;
#else
row_end -= 1;
dst -= LCD_WIDTH*width + 1;
#endif
}
while (--linecounter > 0);
#if LCD_WIDTH >= LCD_HEIGHT
lcd_update_rect(x, y, width, height);
#else
lcd_update_rect(LCD_WIDTH - y - height, x, height, width);
#endif
}
#endif /* HAVE_LCD_COLOR */