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// dst ξ src ֥Ψ lv ǥ֥ɤΤ write ؽФ
#include "config.h"
#include "portab.h"
#include "surface.h"
#include "ngraph.h"
#include "ags.h"
int gre_Blend(surface_t *write, int wx, int wy, surface_t *dst, int dx, int dy, surface_t *src, int sx, int sy, int width, int height, int lv) {
BYTE *sp, *dp, *wp;
int x, y;
wp = GETOFFSET_PIXEL(write, wx, wy);
sp = GETOFFSET_PIXEL(src, sx, sy);
dp = GETOFFSET_PIXEL(dst, dx, dy);
switch(dst->depth) {
case 15:
{
WORD *yls, *yld, *ylw;
for (y = 0; y < height; y++) {
yls = (WORD *)(sp + y * src->bytes_per_line);
yld = (WORD *)(dp + y * dst->bytes_per_line);
ylw = (WORD *)(wp + y * write->bytes_per_line);
for (x = 0; x < width; x++) {
*ylw = ALPHABLEND15(*yls, *yld, lv);
yls++; yld++; ylw++;
}
}
break;
}
case 16:
if (nact->mmx_is_ok) {
// if (0) {
#ifdef ENABLE_MMX
int alpha = lv | lv << 8 | lv << 16 | lv << 24;
ablend16_ppd(wp, sp, dp, alpha,
width, height,
write->bytes_per_line,
src->bytes_per_line,
dst->bytes_per_line);
#endif
} else {
WORD *yls, *yld, *ylw;
for (y = 0; y < height; y++) {
yls = (WORD *)(sp + y * src->bytes_per_line);
yld = (WORD *)(dp + y * dst->bytes_per_line);
ylw = (WORD *)(wp + y * write->bytes_per_line);
for (x = 0; x < width; x++) {
*ylw = ALPHABLEND16(*yls, *yld, lv);
yls++; yld++; ylw++;
}
}
}
break;
case 24:
case 32:
{
DWORD *yls, *yld, *ylw;
for (y = 0; y < height; y++) {
yls = (DWORD *)(sp + y * src->bytes_per_line);
yld = (DWORD *)(dp + y * dst->bytes_per_line);
ylw = (DWORD *)(wp + y * write->bytes_per_line);
for (x = 0; x < width; x++) {
*ylw = ALPHABLEND24(*yls, *yld, lv);
yls++; yld++; ylw++;
}
}
break;
}
}
return OK;
}
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