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This commit is contained in:
Ian Gulliver
2017-08-10 13:51:39 -07:00
parent 06ce954bef
commit c9024d3d63
11 changed files with 165 additions and 65 deletions
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37
lut.h
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@@ -6,7 +6,7 @@
template <uint32_t R, uint32_t G, uint32_t B>
class Lut3d : public std::array<std::array<std::array<Color, B>, G>, R> {
public:
static std::unique_ptr<Lut3d<R, G, B>> Identity();
static Lut3d<R, G, B> Identity();
Color MapColor(const Color& in) const;
@@ -28,20 +28,20 @@ class Lut3d : public std::array<std::array<std::array<Color, B>, G>, R> {
typedef Lut3d<2, 2, 2> MinimalLut3d;
template <uint32_t R, uint32_t G, uint32_t B>
std::unique_ptr<Lut3d<R, G, B>> Lut3d<R, G, B>::Identity() {
auto ret = std::make_unique<Lut3d<R, G, B>>();
Lut3d<R, G, B> Lut3d<R, G, B>::Identity() {
Lut3d<R, G, B> ret;
Color color;
for (uint32_t r = 0; r < R; ++r) {
auto& rect = ret->at(r);
color.r = std::min(kNumColors - 1, BlockSize(R) * r);
auto& rect = ret.at(r);
color.at(0) = std::min(kNumColors - 1, BlockSize(R) * r);
for (uint32_t g = 0; g < G; ++g) {
auto& row = rect.at(g);
color.g = std::min(kNumColors - 1, BlockSize(G) * g);
color.at(1) = std::min(kNumColors - 1, BlockSize(G) * g);
for (uint32_t b = 0; b < B; ++b) {
color.b = std::min(kNumColors - 1, BlockSize(B) * b);
color.at(2) = std::min(kNumColors - 1, BlockSize(B) * b);
row.at(b) = color;
}
}
@@ -104,24 +104,27 @@ std::unique_ptr<Image<X, Y>> Lut3d<R, G, B>::MapImage(const Image<X, Y>& in) con
template <uint32_t R, uint32_t G, uint32_t B>
constexpr Color Lut3d<R, G, B>::InterpolateColor(const Color& i0, const Color& i1, uint32_t mul, uint32_t div) {
return {
Interpolate(i0.r, i1.r, mul, div),
Interpolate(i0.g, i1.g, mul, div),
Interpolate(i0.b, i1.b, mul, div),
};
return {{{
Interpolate(i0.at(0), i1.at(0), mul, div),
Interpolate(i0.at(1), i1.at(1), mul, div),
Interpolate(i0.at(2), i1.at(2), mul, div),
}}};
}
template <uint32_t R, uint32_t G, uint32_t B>
constexpr uint32_t Lut3d<R, G, B>::Interpolate(uint32_t i0, uint32_t i1, uint32_t mul, uint32_t div) {
assert(i1 >= i0);
return i0 + ((mul * (i1 - i0)) / div);
if (i1 > i0) {
return i0 + ((mul * (i1 - i0)) / div);
} else {
return i1 + ((mul * (i0 - i1)) / div);
}
}
template <uint32_t R, uint32_t G, uint32_t B>
constexpr std::pair<Coord3d, Coord3d> Lut3d<R, G, B>::FindRoot(const Color& in) {
auto root_r = FindChannelRoot(in.r, R);
auto root_g = FindChannelRoot(in.g, G);
auto root_b = FindChannelRoot(in.b, B);
auto root_r = FindChannelRoot(in.at(0), R);
auto root_g = FindChannelRoot(in.at(1), G);
auto root_b = FindChannelRoot(in.at(2), B);
return {
{root_r.first, root_g.first, root_b.first},
{root_r.second, root_g.second, root_b.second},