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Advanced blending

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Jakub Melka
2021-01-23 19:03:12 +01:00
parent ea62e6ee32
commit 443c656a46
6 changed files with 442 additions and 0 deletions
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118
Pdf4QtLib/sources/pdfblendfunction.cpp
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@ -80,6 +80,52 @@ bool PDFBlendModeInfo::isSupportedByQt(BlendMode mode)
}
}
bool PDFBlendModeInfo::isSeparable(BlendMode mode)
{
switch (mode)
{
case BlendMode::Normal:
case BlendMode::Multiply:
case BlendMode::Screen:
case BlendMode::Overlay:
case BlendMode::Darken:
case BlendMode::Lighten:
case BlendMode::ColorDodge:
case BlendMode::ColorBurn:
case BlendMode::HardLight:
case BlendMode::SoftLight:
case BlendMode::Difference:
case BlendMode::Exclusion:
case BlendMode::Compatible:
return true;
case BlendMode::Hue:
case BlendMode::Saturation:
case BlendMode::Color:
case BlendMode::Luminosity:
return false;
default:
Q_ASSERT(false);
return false;
}
}
bool PDFBlendModeInfo::isWhitePreserving(BlendMode mode)
{
if (!isSeparable(mode))
{
return false;
}
if (mode == BlendMode::Difference || mode == BlendMode::Exclusion)
{
return false;
}
return true;
}
QPainter::CompositionMode PDFBlendModeInfo::getCompositionModeFromBlendMode(BlendMode mode)
{
switch (mode)
@ -363,6 +409,78 @@ PDFCMYK PDFBlendFunction::blend_Luminosity(PDFCMYK Cb, PDFCMYK Cs)
return nonseparable_rgb2cmyk(blend_Luminosity(nonseparable_cmyk2rgb(Cb), nonseparable_cmyk2rgb(Cs)), Cs[3]);
}
PDFGray PDFBlendFunction::blend_Nonseparable(BlendMode mode, PDFGray Cb, PDFGray Cs)
{
switch (mode)
{
case BlendMode::Hue:
return blend_Hue(Cb, Cs);
case BlendMode::Saturation:
return blend_Saturation(Cb, Cs);
case BlendMode::Color:
return blend_Color(Cb, Cs);
case BlendMode::Luminosity:
return blend_Luminosity(Cb, Cs);
default:
Q_ASSERT(false);
break;
}
return Cs;
}
PDFRGB PDFBlendFunction::blend_Nonseparable(BlendMode mode, PDFRGB Cb, PDFRGB Cs)
{
switch (mode)
{
case BlendMode::Hue:
return blend_Hue(Cb, Cs);
case BlendMode::Saturation:
return blend_Saturation(Cb, Cs);
case BlendMode::Color:
return blend_Color(Cb, Cs);
case BlendMode::Luminosity:
return blend_Luminosity(Cb, Cs);
default:
Q_ASSERT(false);
break;
}
return Cs;
}
PDFCMYK PDFBlendFunction::blend_Nonseparable(BlendMode mode, PDFCMYK Cb, PDFCMYK Cs)
{
switch (mode)
{
case BlendMode::Hue:
return blend_Hue(Cb, Cs);
case BlendMode::Saturation:
return blend_Saturation(Cb, Cs);
case BlendMode::Color:
return blend_Color(Cb, Cs);
case BlendMode::Luminosity:
return blend_Luminosity(Cb, Cs);
default:
Q_ASSERT(false);
break;
}
return Cs;
}
PDFRGB PDFBlendFunction::nonseparable_gray2rgb(PDFGray gray)
{
return nonseparable_SetLum(PDFRGB{ 0.0f, 0.0f, 0.0f }, gray);