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https://github.com/kichikuou/xsystem35-sdl2.git
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125 lines
3.0 KiB
C
125 lines
3.0 KiB
C
// dst の上に src をalphamapを参照しつつ、ブレンド率 lv でブレンド
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// したものを write へ書き出し
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#include "config.h"
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#include "portab.h"
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#include "surface.h"
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#include "ngraph.h"
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#include "ags.h"
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int gre_BlendUseAMap(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, surface_t *alpha, int ax, int ay, int lv) {
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BYTE *sp, *dp, *wp, *ap;
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int x, y;
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wp = GETOFFSET_PIXEL(write, wx, wy);
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sp = GETOFFSET_PIXEL(src, sx, sy);
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dp = GETOFFSET_PIXEL(dst, dx, dy);
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ap = GETOFFSET_ALPHA(alpha, ax, ay);
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if (lv == 255) {
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switch(dst->depth) {
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case 16:
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if (nact->mmx_is_ok) {
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// if (0) {
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#ifdef ENABLE_MMX
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ablend16_ppp(wp, sp, dp, ap,
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width, height,
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write->bytes_per_line,
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src->bytes_per_line,
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dst->bytes_per_line,
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alpha->width, 255);
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#endif
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} else {
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WORD *yls, *yld, *ylw;
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BYTE *yla;
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for (y = 0; y < height; y++) {
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yls = (WORD *)(sp + y * src->bytes_per_line);
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yld = (WORD *)(dp + y * dst->bytes_per_line);
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ylw = (WORD *)(wp + y * write->bytes_per_line);
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yla = (BYTE *)(ap + y * alpha->width);
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for (x = 0; x < width; x++) {
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*ylw = ALPHABLEND16(*yls, *yld, *yla);
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yls++; yld++; ylw++; yla++;
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}
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}
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}
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break;
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case 24:
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case 32:
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{
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DWORD *yls, *yld, *ylw;
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BYTE *yla;
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for (y = 0; y < height; y++) {
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yls = (DWORD *)(sp + y * src->bytes_per_line);
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yld = (DWORD *)(dp + y * dst->bytes_per_line);
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ylw = (DWORD *)(wp + y * write->bytes_per_line);
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yla = (BYTE *)(ap + y * alpha->width);
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for (x = 0; x < width; x++) {
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*ylw = ALPHABLEND24(*yls, *yld, *yla);
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yls++; yld++; ylw++; yla++;
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}
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}
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break;
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}
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}
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} else {
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switch(dst->depth) {
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case 16:
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if (nact->mmx_is_ok) {
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// if (0) {
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#ifdef ENABLE_MMX
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ablend16_ppp(wp, sp, dp, ap,
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width, height,
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write->bytes_per_line,
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src->bytes_per_line,
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dst->bytes_per_line,
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alpha->width, lv);
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#endif
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} else {
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WORD *yls, *yld, *ylw;
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BYTE *yla;
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for (y = 0; y < height; y++) {
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yls = (WORD *)(sp + y * src->bytes_per_line);
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yld = (WORD *)(dp + y * dst->bytes_per_line);
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ylw = (WORD *)(wp + y * write->bytes_per_line);
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yla = (BYTE *)(ap + y * alpha->width);
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for (x = 0; x < width; x++) {
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*ylw = ALPHABLEND16(*yls, *yld, (*yla * lv) / 255);
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yls++; yld++; ylw++; yla++;
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}
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}
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}
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break;
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case 24:
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case 32:
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{
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DWORD *yls, *yld, *ylw;
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BYTE *yla;
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for (y = 0; y < height; y++) {
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yls = (DWORD *)(sp + y * src->bytes_per_line);
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yld = (DWORD *)(dp + y * dst->bytes_per_line);
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ylw = (DWORD *)(wp + y * write->bytes_per_line);
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yla = (BYTE *)(ap + y * alpha->width);
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for (x = 0; x < width; x++) {
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*ylw = ALPHABLEND24(*yls, *yld, (*yla * lv) / 255);
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yls++; yld++; ylw++; yla++;
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}
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}
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break;
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}
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}
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}
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return OK;
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}
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