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// Generic alpha renderers for all YUV modes and RGB depths.
// These are "reference implementations", should be optimized later (MMX, etc)
void vo_draw_alpha_yv12(int w,int h, unsigned char* src, unsigned char *srca, int srcstride, unsigned char* dstbase,int dststride){
int y;
for(y=0;y<h;y++){
register int x;
for(x=0;x<w;x++){
if(srca[x]) dstbase[x]=((dstbase[x]*srca[x])>>8)+src[x];
}
src+=srcstride;
srca+=srcstride;
dstbase+=dststride;
}
return;
}
void vo_draw_alpha_yuy2(int w,int h, unsigned char* src, unsigned char *srca, int srcstride, unsigned char* dstbase,int dststride){
int y;
for(y=0;y<h;y++){
register int x;
for(x=0;x<w;x++){
if(srca[x]) dstbase[2*x]=((dstbase[2*x]*srca[x])>>8)+src[x];
}
src+=srcstride;
srca+=srcstride;
dstbase+=dststride;
}
return;
}
void vo_draw_alpha_rgb24(int w,int h, unsigned char* src, unsigned char *srca, int srcstride, unsigned char* dstbase,int dststride){
int y;
for(y=0;y<h;y++){
register unsigned char *dst = dstbase;
register int x;
for(x=0;x<w;x++){
if(srca[x]){
dst[0]=((dst[0]*srca[x])>>8)+src[x];
dst[1]=((dst[1]*srca[x])>>8)+src[x];
dst[2]=((dst[2]*srca[x])>>8)+src[x];
}
dst+=3; // 24bpp
}
src+=srcstride;
srca+=srcstride;
dstbase+=dststride;
}
return;
}
void vo_draw_alpha_rgb32(int w,int h, unsigned char* src, unsigned char *srca, int srcstride, unsigned char* dstbase,int dststride){
int y;
for(y=0;y<h;y++){
register int x;
for(x=0;x<w;x++){
if(srca[x]){
dstbase[4*x+0]=((dstbase[4*x+0]*srca[x])>>8)+src[x];
dstbase[4*x+1]=((dstbase[4*x+1]*srca[x])>>8)+src[x];
dstbase[4*x+2]=((dstbase[4*x+2]*srca[x])>>8)+src[x];
}
}
src+=srcstride;
srca+=srcstride;
dstbase+=dststride;
}
return;
}
void vo_draw_alpha_rgb15(int w,int h, unsigned char* src, unsigned char *srca, int srcstride, unsigned char* dstbase,int dststride){
int y;
for(y=0;y<h;y++){
register unsigned short *dst = (unsigned short*) dstbase;
register int x;
for(x=0;x<w;x++){
if(srca[x]){
unsigned char r=dst[x]&0x1F;
unsigned char g=(dst[x]>>5)&0x1F;
unsigned char b=(dst[x]>>10)&0x1F;
r=(((r*srca[x])>>5)+src[x])>>3;
g=(((g*srca[x])>>5)+src[x])>>3;
b=(((b*srca[x])>>5)+src[x])>>3;
dst[x]=(b<<10)|(g<<5)|r;
}
}
src+=srcstride;
srca+=srcstride;
dstbase+=dststride;
}
return;
}
void vo_draw_alpha_rgb16(int w,int h, unsigned char* src, unsigned char *srca, int srcstride, unsigned char* dstbase,int dststride){
int y;
for(y=0;y<h;y++){
register unsigned short *dst = (unsigned short*) dstbase;
register int x;
for(x=0;x<w;x++){
if(srca[x]){
unsigned char r=dst[x]&0x1F;
unsigned char g=(dst[x]>>5)&0x3F;
unsigned char b=(dst[x]>>11)&0x1F;
r=(((r*srca[x])>>5)+src[x])>>3;
g=(((g*srca[x])>>6)+src[x])>>2;
b=(((b*srca[x])>>5)+src[x])>>3;
dst[x]=(b<<11)|(g<<5)|r;
}
}
src+=srcstride;
srca+=srcstride;
dstbase+=dststride;
}
return;
}
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