mirror of
https://github.com/kichikuou/xsystem35-sdl2.git
synced 2026-09-22 22:48:08 +03:00
109 lines
2.8 KiB
C
109 lines
2.8 KiB
C
void gr_fill_alpha_overborder(surface_t *dst, int dx, int dy, int dw, int dh, int s, int d) {
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uint8_t *dp;
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int x, y;
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if (dst == NULL) return;
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if (!gr_clip_xywh(dst, &dx, &dy, &dw, &dh)) return;
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dp = GETOFFSET_ALPHA(dst, dx, dy);
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if (dp == NULL) return;
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for (y = 0; y < dh; y++) {
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for (x = 0; x < dw; x++) {
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if (*(dp + x) >= (uint8_t)s) *(dp + x) = (uint8_t)d;
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}
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dp += dst->width;
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}
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}
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void gr_fill_alpha_underborder(surface_t *dst, int dx, int dy, int dw, int dh, int s, int d) {
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uint8_t *dp;
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int x, y;
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if (dst == NULL) return;
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if (!gr_clip_xywh(dst, &dx, &dy, &dw, &dh)) return;
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dp = GETOFFSET_ALPHA(dst, dx, dy);
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if (dp == NULL) return;
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for (y = 0; y < dh; y++) {
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for (x = 0; x < dw; x++) {
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if (*(dp + x) <= (uint8_t)s) *(dp + x) = (uint8_t)d;
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}
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dp += dst->width;
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}
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}
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void gr_copy_alpha_map_sprite(surface_t *dst, int dx, int dy, surface_t *src, int sx, int sy, int sw, int sh, int cl) {
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uint8_t *sp, *dp;
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int x, y;
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if (!gr_clip(src, &sx, &sy, &sw, &sh, dst, &dx, &dy)) return;
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sp = GETOFFSET_ALPHA(src, sx, sy);
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dp = GETOFFSET_ALPHA(dst, dx, dy);
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if (src == dst) {
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if (sy <= dy && dy < (sy + sh)) {
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sp += (sh -1) * src->width;
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dp += (sh -1) * dst->width;
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for (y = 0; y < sh; y++) {
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for (x = 0; x < sw; x++) {
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if (*(sp + x) != cl) *(dp + x) = *(sp + x);
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}
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sp -= src->width;
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dp -= dst->width;
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}
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} else {
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for (y = 0; y < sh; y++) {
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for (x = 0; x < sw; x++) {
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if (*(sp + x) != cl) *(dp + x) = *(sp + x);
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}
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sp += src->width;
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dp += dst->width;
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}
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}
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} else {
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for (y = 0; y < sh; y++) {
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for (x = 0; x < sw; x++) {
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if (*(sp + x) != cl) *(dp + x) = *(sp + x);
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}
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sp += src->width;
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dp += dst->width;
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}
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}
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}
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void gr_blend_alpha_wds_stretch2x2(surface_t *src1, int sx1, int sy1, surface_t *src2, int sx2, int sy2, int sw, int sh, surface_t *dst, int dx, int dy) {
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surface_t *t = sf_create_surface(sw * 2, sh * 2);
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gr_copy_stretch(t, 0, 0, sw * 2, sh * 2, src2, sx2, sy2, sw, sh);
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gr_blend_alpha_wds(t, 0, 0, src1, sx1, sy1, sw * 2, sh * 2, dst, dx, dy);
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sf_free(t);
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}
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void gr_blend_alpha_wds(surface_t *src1, int sx1, int sy1, surface_t *src2, int sx2, int sy2, int sw, int sh, surface_t *dst, int dx, int dy) {
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int x, y;
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uint8_t *sp1, *sp2, *dp, *sa;
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sp1 = GETOFFSET_PIXEL(src1, sx1, sy1);
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sp2 = GETOFFSET_PIXEL(src2, sx2, sy2);
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sa = GETOFFSET_ALPHA(src1, sx1, sy1);
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dp = GETOFFSET_PIXEL(dst, dx, dy);
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for (y = 0; y < sh; y++) {
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uint32_t *yls1 = (uint32_t *)(sp1 + y * src1->sdl_surface->pitch);
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uint32_t *yls2 = (uint32_t *)(sp2 + y * src2->sdl_surface->pitch);
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uint32_t *yld = (uint32_t *)(dp + y * dst->sdl_surface->pitch);
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uint8_t *yla = (uint8_t *)(sa + y * src1->width);
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for (x = 0; x < sw; x++) {
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*yld = SUTURADD24(*yls1, ALPHABLEND24(*yls1, *yls2, *yla));
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yls1++; yls2++; yld++; yla++;
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}
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}
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}
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