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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2022 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
By using JUCE, you agree to the terms of both the JUCE 7 End-User License
Agreement and JUCE Privacy Policy.
End User License Agreement: www.juce.com/juce-7-licence
Privacy Policy: www.juce.com/juce-privacy-policy
Or: You may also use this code under the terms of the GPL v3 (see
www.gnu.org/licenses).
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
DISCLAIMED.
==============================================================================
*/
namespace juce
{
namespace detail
{
struct ColorSpaceDelete
{
void operator() (CGColorSpaceRef ptr) const noexcept { CGColorSpaceRelease (ptr); }
};
struct ContextDelete
{
void operator() (CGContextRef ptr) const noexcept { CGContextRelease (ptr); }
};
struct DataProviderDelete
{
void operator() (CGDataProviderRef ptr) const noexcept { CGDataProviderRelease (ptr); }
};
struct ImageDelete
{
void operator() (CGImageRef ptr) const noexcept { CGImageRelease (ptr); }
};
struct GradientDelete
{
void operator() (CGGradientRef ptr) const noexcept { CGGradientRelease (ptr); }
};
struct ColorDelete
{
void operator() (CGColorRef ptr) const noexcept { CGColorRelease (ptr); }
};
//==============================================================================
using ColorSpacePtr = std::unique_ptr<CGColorSpace, ColorSpaceDelete>;
using ContextPtr = std::unique_ptr<CGContext, ContextDelete>;
using DataProviderPtr = std::unique_ptr<CGDataProvider, DataProviderDelete>;
using ImagePtr = std::unique_ptr<CGImage, ImageDelete>;
using GradientPtr = std::unique_ptr<CGGradient, GradientDelete>;
using ColorPtr = std::unique_ptr<CGColor, ColorDelete>;
}
//==============================================================================
class CoreGraphicsContext : public LowLevelGraphicsContext
{
public:
CoreGraphicsContext (CGContextRef context, float flipHeight);
~CoreGraphicsContext() override;
//==============================================================================
bool isVectorDevice() const override { return false; }
void setOrigin (Point<int>) override;
void addTransform (const AffineTransform&) override;
float getPhysicalPixelScaleFactor() override;
bool clipToRectangle (const Rectangle<int>&) override;
bool clipToRectangleList (const RectangleList<int>&) override;
void excludeClipRectangle (const Rectangle<int>&) override;
void clipToPath (const Path&, const AffineTransform&) override;
void clipToImageAlpha (const Image&, const AffineTransform&) override;
bool clipRegionIntersects (const Rectangle<int>&) override;
Rectangle<int> getClipBounds() const override;
bool isClipEmpty() const override;
//==============================================================================
void saveState() override;
void restoreState() override;
void beginTransparencyLayer (float opacity) override;
void endTransparencyLayer() override;
//==============================================================================
void setFill (const FillType&) override;
void setOpacity (float) override;
void setInterpolationQuality (Graphics::ResamplingQuality) override;
//==============================================================================
void fillAll() override;
void fillRect (const Rectangle<int>&, bool replaceExistingContents) override;
void fillRect (const Rectangle<float>&) override;
void fillRectList (const RectangleList<float>&) override;
void fillPath (const Path&, const AffineTransform&) override;
void drawImage (const Image& sourceImage, const AffineTransform&) override;
//==============================================================================
void drawLine (const Line<float>&) override;
void setFont (const Font&) override;
const Font& getFont() override;
void drawGlyph (int glyphNumber, const AffineTransform&) override;
bool drawTextLayout (const AttributedString&, const Rectangle<float>&) override;
private:
//==============================================================================
detail::ContextPtr context;
const CGFloat flipHeight;
detail::ColorSpacePtr rgbColourSpace, greyColourSpace;
mutable Rectangle<int> lastClipRect;
mutable bool lastClipRectIsValid = false;
struct SavedState
{
SavedState();
SavedState (const SavedState&);
~SavedState();
void setFill (const FillType&);
FillType fillType;
Font font;
CGFontRef fontRef = {};
CGAffineTransform textMatrix = CGAffineTransformIdentity,
inverseTextMatrix = CGAffineTransformIdentity;
detail::GradientPtr gradient = {};
};
std::unique_ptr<SavedState> state;
OwnedArray<SavedState> stateStack;
void drawGradient();
void createPath (const Path&) const;
void createPath (const Path&, const AffineTransform&) const;
void flip() const;
void applyTransform (const AffineTransform&) const;
void drawImage (const Image&, const AffineTransform&, bool fillEntireClipAsTiles);
bool clipToRectangleListWithoutTest (const RectangleList<int>&);
void fillCGRect (const CGRect&, bool replaceExistingContents);
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (CoreGraphicsContext)
};
} // namespace juce
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