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Implement -C

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This commit is contained in:
ISSOtm
2022-03-06 13:35:19 +01:00
committed by Eldred Habert
parent d438838db4
commit c98d92a4c4
1 changed files with 31 additions and 3 deletions
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34
src/gfx/rgba.cpp
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@@ -6,15 +6,43 @@
#include "gfx/main.hpp" // options
/*
* based on the Gaussian-like curve used by SameBoy since commit
* 65dd02cc52f531dbbd3a7e6014e99d5b24e71a4c (Oct 2017)
* with ties resolved by comparing the difference of the squares.
*/
static std::array<uint8_t, 256> reverse_curve{
0, 0, 1, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, // These
5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, // comments
7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, // prevent
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, // clang-format
10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, // from
12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, // reflowing
13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, // these
14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, // 16
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, // 16-iterm
17, 17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, // lines,
18, 18, 18, 18, 18, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, // which,
19, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 21, 21, 21, 21, // in
21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22, 22, 22, 22, // my
22, 23, 23, 23, 23, 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, // opinion,
24, 24, 25, 25, 25, 25, 25, 25, 25, 25, 26, 26, 26, 26, 26, 26, // help
26, 27, 27, 27, 27, 27, 28, 28, 28, 28, 29, 29, 29, 30, 30, 31, // visualization!
};
uint16_t Rgba::cgbColor() const {
if (isTransparent()) {
return transparent;
}
uint8_t r = red, g = green, b = blue;
if (options.useColorCurve) {
assert(!"TODO");
} else {
return (red >> 3) | (green >> 3) << 5 | (blue >> 3) << 10;
g = g * 4 < b ? 0 : (g * 4 - b) / 3;
r = reverse_curve[r];
g = reverse_curve[g];
b = reverse_curve[b];
}
return (r >> 3) | (g >> 3) << 5 | (b >> 3) << 10;
}
uint8_t Rgba::grayIndex() const {