+ memcpy(buf, Source, giScreenWidth*H*4);
+ }
+}
+
+tColour Video_AlphaBlend(tColour _orig, tColour _new, uint8_t _alpha)
+{
+ uint16_t ao,ro,go,bo;
+ uint16_t an,rn,gn,bn;
+ if( _alpha == 0 ) return _orig;
+ if( _alpha == 255 ) return _new;
+
+ ao = (_orig >> 24) & 0xFF;
+ ro = (_orig >> 16) & 0xFF;
+ go = (_orig >> 8) & 0xFF;
+ bo = (_orig >> 0) & 0xFF;
+
+ an = (_new >> 24) & 0xFF;
+ rn = (_new >> 16) & 0xFF;
+ gn = (_new >> 8) & 0xFF;
+ bn = (_new >> 0) & 0xFF;
+
+ if( _alpha == 0x80 ) {
+ ao = (ao + an) / 2;
+ ro = (ro + rn) / 2;
+ go = (go + gn) / 2;
+ bo = (bo + bn) / 2;