mirror of https://github.com/bsnes-emu/bsnes.git
66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
#ifndef NALL_IMAGE_INTERPOLATION_HPP
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#define NALL_IMAGE_INTERPOLATION_HPP
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namespace nall {
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void image::isplit(uint64_t* c, uint64_t color) {
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c[0] = (color & alpha.mask) >> alpha.shift;
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c[1] = (color & red.mask ) >> red.shift;
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c[2] = (color & green.mask) >> green.shift;
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c[3] = (color & blue.mask ) >> blue.shift;
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}
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uint64_t image::imerge(const uint64_t* c) {
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return c[0] << alpha.shift | c[1] << red.shift | c[2] << green.shift | c[3] << blue.shift;
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}
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uint64_t image::interpolate1f(uint64_t a, uint64_t b, double x) {
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return a * (1.0 - x) + b * x;
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}
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uint64_t image::interpolate1f(uint64_t a, uint64_t b, uint64_t c, uint64_t d, double x, double y) {
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return a * (1.0 - x) * (1.0 - y) + b * x * (1.0 - y) + c * (1.0 - x) * y + d * x * y;
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}
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uint64_t image::interpolate1i(int64_t a, int64_t b, uint32_t x) {
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return a + (((b - a) * x) >> 32); //a + (b - a) * x
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}
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uint64_t image::interpolate1i(int64_t a, int64_t b, int64_t c, int64_t d, uint32_t x, uint32_t y) {
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a = a + (((b - a) * x) >> 32); //a + (b - a) * x
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c = c + (((d - c) * x) >> 32); //c + (d - c) * x
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return a + (((c - a) * y) >> 32); //a + (c - a) * y
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}
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uint64_t image::interpolate4f(uint64_t a, uint64_t b, double x) {
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uint64_t o[4], pa[4], pb[4];
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isplit(pa, a), isplit(pb, b);
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for(unsigned n = 0; n < 4; n++) o[n] = interpolate1f(pa[n], pb[n], x);
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return imerge(o);
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}
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uint64_t image::interpolate4f(uint64_t a, uint64_t b, uint64_t c, uint64_t d, double x, double y) {
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uint64_t o[4], pa[4], pb[4], pc[4], pd[4];
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isplit(pa, a), isplit(pb, b), isplit(pc, c), isplit(pd, d);
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for(unsigned n = 0; n < 4; n++) o[n] = interpolate1f(pa[n], pb[n], pc[n], pd[n], x, y);
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return imerge(o);
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}
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uint64_t image::interpolate4i(uint64_t a, uint64_t b, uint32_t x) {
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uint64_t o[4], pa[4], pb[4];
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isplit(pa, a), isplit(pb, b);
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for(unsigned n = 0; n < 4; n++) o[n] = interpolate1i(pa[n], pb[n], x);
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return imerge(o);
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}
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uint64_t image::interpolate4i(uint64_t a, uint64_t b, uint64_t c, uint64_t d, uint32_t x, uint32_t y) {
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uint64_t o[4], pa[4], pb[4], pc[4], pd[4];
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isplit(pa, a), isplit(pb, b), isplit(pc, c), isplit(pd, d);
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for(unsigned n = 0; n < 4; n++) o[n] = interpolate1i(pa[n], pb[n], pc[n], pd[n], x, y);
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return imerge(o);
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}
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}
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#endif
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