/*
  ==============================================================================

   This file is part of the JUCE framework.
   Copyright (c) Raw Material Software Limited

   JUCE is an open source framework subject to commercial or open source
   licensing.

   By downloading, installing, or using the JUCE framework, or combining the
   JUCE framework with any other source code, object code, content or any other
   copyrightable work, you agree to the terms of the JUCE End User Licence
   Agreement, and all incorporated terms including the JUCE Privacy Policy and
   the JUCE Website Terms of Service, as applicable, which will bind you. If you
   do not agree to the terms of these agreements, we will not license the JUCE
   framework to you, and you must discontinue the installation or download
   process and cease use of the JUCE framework.

   JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
   JUCE Privacy Policy: https://juce.com/juce-privacy-policy
   JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/

   Or:

   You may also use this code under the terms of the AGPLv3:
   https://www.gnu.org/licenses/agpl-3.0.en.html

   THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
   WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.

  ==============================================================================
*/

namespace juce
{

//==============================================================================
/**
    An implementation of LowLevelGraphicsContext that turns the drawing operations
    into a PostScript document.

    @tags{Graphics}
*/
class JUCE_API  LowLevelGraphicsPostScriptRenderer    : public LowLevelGraphicsContext
{
public:
    //==============================================================================
    LowLevelGraphicsPostScriptRenderer (OutputStream& resultingPostScript,
                                        const String& documentTitle,
                                        int totalWidth,
                                        int totalHeight);

    //==============================================================================
    bool isVectorDevice() const override;
    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;

    void saveState() override;
    void restoreState() override;

    void beginTransparencyLayer (float) override;
    void endTransparencyLayer() override;

    bool clipRegionIntersects (const Rectangle<int>&) override;
    Rectangle<int> getClipBounds() const override;
    bool isClipEmpty() const override;

    //==============================================================================
    void setFill (const FillType&) override;
    void setOpacity (float) override;
    void setInterpolationQuality (Graphics::ResamplingQuality) 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&, const AffineTransform&) override;
    void drawLine (const Line<float>&) override;

    //==============================================================================
    const Font& getFont() override;
    void setFont (const Font&) override;
    void drawGlyphs (Span<const uint16_t> glyphs,
                     Span<const Point<float>> positions,
                     const AffineTransform&) override;

protected:
    //==============================================================================
    OutputStream& out;
    int totalWidth, totalHeight;
    bool needToClip;
    Colour lastColour;

    /** Describes a saved state */
    struct SavedState
    {
        SavedState();
        SavedState (const SavedState&) = default;
        SavedState& operator= (const SavedState&) = delete;

        RectangleList<int> clip;
        int xOffset, yOffset;
        FillType fillType;
        Font font { FontOptions{} };
    };

    OwnedArray<SavedState> stateStack;

    void writeClip();
    void writeColour (Colour colour);
    void writePath (const Path&) const;
    void writeXY (float x, float y) const;
    void writeTransform (const AffineTransform&) const;
    void writeImage (const Image&, int sx, int sy, int maxW, int maxH) const;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LowLevelGraphicsPostScriptRenderer)
};

} // namespace juce