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

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2020 - Raw Material Software Limited

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   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
{

//==============================================================================
/**
    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);

    ~LowLevelGraphicsPostScriptRenderer() override;

    //==============================================================================
    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 drawGlyph (int glyphNumber, const AffineTransform&) override;

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

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

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

    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