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32-bit color support

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elasota
2020-06-13 04:33:41 -04:00
parent 24f43b973a
commit 4920781619
42 changed files with 1161 additions and 450 deletions
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27
PortabilityLayer/AntiAliasTable.cpp
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@@ -1,6 +1,9 @@
#include "AntiAliasTable.h"
#include "RGBAColor.h"
#include <algorithm>
#include <math.h>
// TODO: This is not gamma correct...
namespace PortabilityLayer
{
@@ -116,5 +119,29 @@ namespace PortabilityLayer
}
}
}
void AntiAliasTable::GenerateForSimpleScale(uint8_t colorChannel)
{
const double gamma = 1.8;
const double rcpGamma = 1.0 / gamma;
const double rcp255 = 1.0 / 255.0;
const double rcp15 = 1.0 / 15.0;
double colorChannelLinear = pow(colorChannel * rcp255, gamma);
for (size_t baseColor = 0; baseColor < 256; baseColor++)
{
const double baseColorLinear = pow(baseColor * rcp255, gamma);
for (size_t opacity = 0; opacity < 16; opacity++)
{
const double opacityF = static_cast<double>(opacity) * rcp15;
const double blendedColor = colorChannelLinear * opacityF + (1.0 - opacityF) * baseColorLinear;
const double blendedColorGammaSpace = pow(std::min(std::max(0.0, blendedColor), 1.0), rcpGamma);
m_aaTranslate[baseColor][opacity] = static_cast<uint8_t>(floor(blendedColorGammaSpace * 255.0 + 0.5));
}
}
}
#endif
}