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60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 5 End-User License
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Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
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27th April 2017).
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End User License Agreement: www.juce.com/juce-5-licence
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Privacy Policy: www.juce.com/juce-5-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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GlowEffect::GlowEffect()
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: radius (2.0f),
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colour (Colours::white)
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{
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}
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GlowEffect::~GlowEffect()
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{
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}
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void GlowEffect::setGlowProperties (const float newRadius,
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Colour newColour)
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{
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radius = newRadius;
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colour = newColour;
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}
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void GlowEffect::applyEffect (Image& image, Graphics& g, float scaleFactor, float alpha)
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{
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Image temp (image.getFormat(), image.getWidth(), image.getHeight(), true);
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ImageConvolutionKernel blurKernel (roundToInt (radius * scaleFactor * 2.0f));
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blurKernel.createGaussianBlur (radius);
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blurKernel.rescaleAllValues (radius);
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blurKernel.applyToImage (temp, image, image.getBounds());
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g.setColour (colour.withMultipliedAlpha (alpha));
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g.drawImageAt (temp, 0, 0, true);
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g.setOpacity (alpha);
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g.drawImageAt (image, 0, 0, false);
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}
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