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101 lines
4.1 KiB
101 lines
4.1 KiB
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2015 - ROLI Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found at: www.gnu.org/licenses
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.juce.com for more information.
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==============================================================================
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*/
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#ifndef JUCE_LOWLEVELGRAPHICSCONTEXT_H_INCLUDED
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#define JUCE_LOWLEVELGRAPHICSCONTEXT_H_INCLUDED
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//==============================================================================
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/**
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Interface class for graphics context objects, used internally by the Graphics class.
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Users are not supposed to create instances of this class directly - do your drawing
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via the Graphics object instead.
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It's a base class for different types of graphics context, that may perform software-based
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or OS-accelerated rendering.
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E.g. the LowLevelGraphicsSoftwareRenderer renders onto an image in memory, but other
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subclasses could render directly to a windows HDC, a Quartz context, or an OpenGL
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context.
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*/
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class JUCE_API LowLevelGraphicsContext
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{
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protected:
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//==============================================================================
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LowLevelGraphicsContext();
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public:
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virtual ~LowLevelGraphicsContext();
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/** Returns true if this device is vector-based, e.g. a printer. */
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virtual bool isVectorDevice() const = 0;
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//==============================================================================
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/** Moves the origin to a new position.
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The coordinates are relative to the current origin, and indicate the new position
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of (0, 0).
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*/
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virtual void setOrigin (Point<int>) = 0;
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virtual void addTransform (const AffineTransform&) = 0;
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virtual float getPhysicalPixelScaleFactor() = 0;
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virtual bool clipToRectangle (const Rectangle<int>&) = 0;
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virtual bool clipToRectangleList (const RectangleList<int>&) = 0;
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virtual void excludeClipRectangle (const Rectangle<int>&) = 0;
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virtual void clipToPath (const Path&, const AffineTransform&) = 0;
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virtual void clipToImageAlpha (const Image&, const AffineTransform&) = 0;
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virtual bool clipRegionIntersects (const Rectangle<int>&) = 0;
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virtual Rectangle<int> getClipBounds() const = 0;
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virtual bool isClipEmpty() const = 0;
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virtual void saveState() = 0;
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virtual void restoreState() = 0;
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virtual void beginTransparencyLayer (float opacity) = 0;
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virtual void endTransparencyLayer() = 0;
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//==============================================================================
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virtual void setFill (const FillType&) = 0;
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virtual void setOpacity (float) = 0;
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virtual void setInterpolationQuality (Graphics::ResamplingQuality) = 0;
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//==============================================================================
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virtual void fillRect (const Rectangle<int>&, bool replaceExistingContents) = 0;
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virtual void fillRect (const Rectangle<float>&) = 0;
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virtual void fillRectList (const RectangleList<float>&) = 0;
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virtual void fillPath (const Path&, const AffineTransform&) = 0;
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virtual void drawImage (const Image&, const AffineTransform&) = 0;
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virtual void drawLine (const Line<float>&) = 0;
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virtual void setFont (const Font&) = 0;
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virtual const Font& getFont() = 0;
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virtual void drawGlyph (int glyphNumber, const AffineTransform&) = 0;
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virtual bool drawTextLayout (const AttributedString&, const Rectangle<float>&) { return false; }
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};
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#endif // JUCE_LOWLEVELGRAPHICSCONTEXT_H_INCLUDED
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