package sun.java2d;

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.RenderingHints.Key;
import java.awt.geom.Area;
import java.awt.geom.AffineTransform;
import java.awt.geom.NoninvertibleTransformException;
import java.awt.AlphaComposite;
import java.awt.BasicStroke;
import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;
import java.awt.image.RenderedImage;
import java.awt.image.renderable.RenderableImage;
import java.awt.image.renderable.RenderContext;
import java.awt.image.AffineTransformOp;
import java.awt.image.Raster;
import java.awt.image.SampleModel;
import java.awt.image.VolatileImage;
import java.awt.image.WritableRaster;
import java.awt.Image;
import java.awt.Composite;
import java.awt.Color;
import java.awt.color.ColorSpace;
import java.awt.image.DataBuffer;
import java.awt.image.ColorModel;
import java.awt.image.IndexColorModel;
import java.awt.image.DirectColorModel;
import java.awt.GraphicsConfiguration;
import java.awt.Paint;
import java.awt.GradientPaint;
import java.awt.LinearGradientPaint;
import java.awt.RadialGradientPaint;
import java.awt.TexturePaint;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.awt.geom.PathIterator;
import java.awt.geom.GeneralPath;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.FontMetrics;
import java.awt.Rectangle;
import java.text.AttributedCharacterIterator;
import java.awt.Font;
import java.awt.image.ImageObserver;
import java.awt.image.ColorConvertOp;
import java.awt.Transparency;
import java.awt.font.GlyphVector;
import java.awt.font.TextLayout;
import sun.font.FontDesignMetrics;
import sun.font.StandardGlyphVector;
import sun.java2d.pipe.PixelDrawPipe;
import sun.java2d.pipe.PixelFillPipe;
import sun.java2d.pipe.ShapeDrawPipe;
import sun.java2d.pipe.ValidatePipe;
import sun.java2d.pipe.ShapeSpanIterator;
import sun.java2d.pipe.Region;
import sun.java2d.pipe.RegionIterator;
import sun.java2d.pipe.TextPipe;
import sun.java2d.pipe.DrawImagePipe;
import sun.java2d.pipe.LoopPipe;
import sun.java2d.loops.FontInfo;
import sun.java2d.loops.RenderLoops;
import sun.java2d.loops.CompositeType;
import sun.java2d.loops.SurfaceType;
import sun.java2d.loops.Blit;
import sun.java2d.loops.BlitBg;
import sun.java2d.loops.MaskFill;
import sun.font.FontManager;
import java.awt.font.FontRenderContext;
import sun.java2d.loops.XORComposite;
import sun.awt.ConstrainableGraphics;
import sun.awt.SunHints;
import java.util.Map;
import java.util.Iterator;
import sun.awt.image.OffScreenImage;
import sun.misc.PerformanceLogger;

/**
 * This is a the master Graphics2D superclass for all of the Sun
 * Graphics implementations.  This class relies on subclasses to
 * manage the various device information, but provides an overall
 * general framework for performing all of the requests in the
 * Graphics and Graphics2D APIs.
 *
 * @author Jim Graham
 */
public final class SunGraphics2D
    extends Graphics2D
    implements ConstrainableGraphics, Cloneable
{
    /*
     * Attribute States
     */
    /* Paint */
    public static final int PAINT_CUSTOM       = 6; /* Any other Paint object */
    public static final int PAINT_TEXTURE      = 5; /* Tiled Image */
    public static final int PAINT_RAD_GRADIENT = 4; /* Color RadialGradient */
    public static final int PAINT_LIN_GRADIENT = 3; /* Color LinearGradient */
    public static final int PAINT_GRADIENT     = 2; /* Color Gradient */
    public static final int PAINT_ALPHACOLOR   = 1; /* Non-opaque Color */
    public static final int PAINT_OPAQUECOLOR  = 0; /* Opaque Color */

    /* Composite*/
    public static final int COMP_CUSTOM = 3;/* Custom Composite */
    public static final int COMP_XOR    = 2;/* XOR Mode Composite */
    public static final int COMP_ALPHA  = 1;/* AlphaComposite */
    public static final int COMP_ISCOPY = 0;/* simple stores into destination,
                                             * i.e. Src, SrcOverNoEa, and other
                                             * alpha modes which replace
                                             * the destination.
                                             */

    /* Stroke */
    public static final int STROKE_CUSTOM = 3; /* custom Stroke */
    public static final int STROKE_WIDE   = 2; /* BasicStroke */
    public static final int STROKE_THINDASHED   = 1; /* BasicStroke */
    public static final int STROKE_THIN   = 0; /* BasicStroke */

    /* Transform */
    public static final int TRANSFORM_GENERIC = 4; /* any 3x2 */
    public static final int TRANSFORM_TRANSLATESCALE = 3; /* scale XY */
    public static final int TRANSFORM_ANY_TRANSLATE = 2; /* non-int translate */
    public static final int TRANSFORM_INT_TRANSLATE = 1; /* int translate */
    public static final int TRANSFORM_ISIDENT = 0; /* Identity */

    /* Clipping */
    public static final int CLIP_SHAPE       = 2; /* arbitrary clip */
    public static final int CLIP_RECTANGULAR = 1; /* rectangular clip */
    public static final int CLIP_DEVICE      = 0; /* no clipping set */

    /* The following fields are used when the current Paint is a Color. */
    public int eargb;  // ARGB value with ExtraAlpha baked in
    public int pixel;  // pixel value for eargb

    public SurfaceData surfaceData;

    public PixelDrawPipe drawpipe;
    public PixelFillPipe fillpipe;
    public DrawImagePipe imagepipe;
    public ShapeDrawPipe shapepipe;
    public TextPipe textpipe;
    public MaskFill alphafill;

    public RenderLoops loops;

    public CompositeType imageComp;     /* Image Transparency checked on fly */

    public int paintState;
    public int compositeState;
    public int strokeState;
    public int transformState;
    public int clipState;

    public Color foregroundColor;
    public Color backgroundColor;

    public AffineTransform transform;
    public int transX;
    public int transY;

    protected static final Stroke defaultStroke = new BasicStroke();
    protected static final Composite defaultComposite = AlphaComposite.SrcOver;
    private static final Font defaultFont =
        new Font(Font.DIALOG, Font.PLAIN, 12);

    public Paint paint;
    public Stroke stroke;
    public Composite composite;
    protected Font font;
    protected FontMetrics fontMetrics;

    public int renderHint;
    public int antialiasHint;
    public int textAntialiasHint;
    private int fractionalMetricsHint;

    /* A gamma adjustment to the colour used in lcd text blitting */
    public int lcdTextContrast;
    private static int lcdTextContrastDefaultValue = 140;

    private int interpolationHint;      // raw value of rendering Hint
    public int strokeHint;

    public int interpolationType;       // algorithm choice based on
                                        // interpolation and render Hints

    public RenderingHints hints;

    public Region constrainClip;                // lightweight bounds
    public int constrainX;
    public int constrainY;

    public Region clipRegion;
    public Shape usrClip;
    protected Region devClip;           // Actual physical drawable

    // cached state for text rendering
    private boolean validFontInfo;
    private FontInfo fontInfo;
    private FontInfo glyphVectorFontInfo;
    private FontRenderContext glyphVectorFRC;

    private final static int slowTextTransformMask =
                            AffineTransform.TYPE_GENERAL_TRANSFORM
                        |   AffineTransform.TYPE_MASK_ROTATION
                        |   AffineTransform.TYPE_FLIP;

    static {
        if (PerformanceLogger.loggingEnabled()) {
            PerformanceLogger.setTime("SunGraphics2D static initialization");
        }
    }

    public SunGraphics2D(SurfaceData sd, Color fg, Color bg, Font f) {
        surfaceData = sd;
        foregroundColor = fg;
        backgroundColor = bg;

        transform = new AffineTransform();
        stroke = defaultStroke;
        composite = defaultComposite;
        paint = foregroundColor;

        imageComp = CompositeType.SrcOverNoEa;

        renderHint = SunHints.INTVAL_RENDER_DEFAULT;
        antialiasHint = SunHints.INTVAL_ANTIALIAS_OFF;
        textAntialiasHint = SunHints.INTVAL_TEXT_ANTIALIAS_DEFAULT;
        fractionalMetricsHint = SunHints.INTVAL_FRACTIONALMETRICS_OFF;
        lcdTextContrast = lcdTextContrastDefaultValue;
        interpolationHint = -1;
        strokeHint = SunHints.INTVAL_STROKE_DEFAULT;

        interpolationType = AffineTransformOp.TYPE_NEAREST_NEIGHBOR;

        validateColor();

        font = f;
        if (font == null) {
            font = defaultFont;
        }

        loops = sd.getRenderLoops(this);
        setDevClip(sd.getBounds());
        invalidatePipe();
    }