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24 lines
649 B
C
24 lines
649 B
C
// 転送元 alpha map を参照して、転送元ピクセルと転送先ピクセルをブレンドし、
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// 転送先ピクセルに描画
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#include <stdio.h>
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#include "portab.h"
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#include "system.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 gr_blend_alpha_map(surface_t *dst, int dx, int dy, surface_t *src, int sx, int sy, int sw, int sh) {
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if (src == NULL || dst == NULL) return NG;
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if (!gr_clip(src, &sx, &sy, &sw, &sh, dst, &dx, &dy)) return NG;
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if (src->alpha == NULL) {
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WARNING("src alpha NULL\n");
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return NG;
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}
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return gre_BlendUseAMap(dst, dx, dy, dst, dx, dy, src, sx, sy, sw, sh, src, sx, sy, 255);
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}
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