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Original implementation of Alpha Image filters

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Chromakey (to finish), lumakey and alpha fill.
This commit is contained in:
Bruno Herbelin
2022-06-06 23:33:36 +02:00
parent fec2fb7ce6
commit 1604eaa239
16 changed files with 246 additions and 8 deletions
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43
ImageFilter.cpp
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@@ -770,3 +770,46 @@ void EdgeFilter::accept (Visitor& v)
////////////////////////////////////////
///// //
//// ALPHA FILTERS ///
/// ////
////////////////////////////////////////
const char* AlphaFilter::operation_label[AlphaFilter::ALPHA_INVALID] = {
"Chromakey", "Lumakey", "Fill transparent"
};
std::vector< FilteringProgram > AlphaFilter::programs_ = {
FilteringProgram("Chromakey","shaders/filters/chromakey.glsl", "", { { "Red", 0.0}, { "Green", 1.0}, { "Blue", 0.0}, { "Tolerance", 1.0} }),
FilteringProgram("Lumakey", "shaders/filters/lumakey.glsl", "", { { "Tolerance", 0.5} }),
FilteringProgram("coloralpha","shaders/filters/coloralpha.glsl", "", { { "Red", 0.0}, { "Green", 1.0}, { "Blue", 0.0} })
};
AlphaFilter::AlphaFilter (): ImageFilter(), operation_(ALPHA_INVALID)
{
}
void AlphaFilter::setOperation(int op)
{
operation_ = (AlphaOperation) CLAMP(op, ALPHA_CHROMAKEY, ALPHA_INVALID-1);
setProgram( programs_[ (int) operation_] );
}
void AlphaFilter::draw (FrameBuffer *input)
{
// Default
if (operation_ == ALPHA_INVALID)
setOperation( ALPHA_CHROMAKEY );
ImageFilter::draw( input );
}
void AlphaFilter::accept (Visitor& v)
{
FrameBufferFilter::accept(v);
v.visit(*this);
}