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exr: Port to std::log/pow

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The Imath functions are marked as deprecated and they just call the
std::log/pow anyway
This commit is contained in:
Albert Astals Cid
2021-08-12 16:21:30 +02:00
parent 28099eed71
commit 9f2c5061c8
1 changed files with 8 additions and 8 deletions
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16
src/imageformats/exr.cpp
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@ -135,24 +135,24 @@ QRgb RgbaToQrgba(struct Imf::Rgba &imagePixel)
// maximum intensity).
// Response: kneeLow = 0.0 (2^0.0 => 1); kneeHigh = 5.0 (2^5 =>32)
if (r > 1.0) {
r = 1.0 + Imath::Math<float>::log((r - 1.0) * 0.184874 + 1) / 0.184874;
r = 1.0 + std::log((r - 1.0) * 0.184874 + 1) / 0.184874;
}
if (g > 1.0) {
g = 1.0 + Imath::Math<float>::log((g - 1.0) * 0.184874 + 1) / 0.184874;
g = 1.0 + std::log((g - 1.0) * 0.184874 + 1) / 0.184874;
}
if (b > 1.0) {
b = 1.0 + Imath::Math<float>::log((b - 1.0) * 0.184874 + 1) / 0.184874;
b = 1.0 + std::log((b - 1.0) * 0.184874 + 1) / 0.184874;
}
if (a > 1.0) {
a = 1.0 + Imath::Math<float>::log((a - 1.0) * 0.184874 + 1) / 0.184874;
a = 1.0 + std::log((a - 1.0) * 0.184874 + 1) / 0.184874;
}
//
// 5) Gamma-correct the pixel values, assuming that the
// screen's gamma is 0.4545 (or 1/2.2).
r = Imath::Math<float>::pow(r, 0.4545);
g = Imath::Math<float>::pow(g, 0.4545);
b = Imath::Math<float>::pow(b, 0.4545);
a = Imath::Math<float>::pow(a, 0.4545);
r = std::pow(r, 0.4545);
g = std::pow(g, 0.4545);
b = std::pow(b, 0.4545);
a = std::pow(a, 0.4545);
// 6) Scale the values such that pixels middle gray
// pixels are mapped to 84.66 (or 3.5 f-stops below