/**

  * Back 2 Browser Bytecode Translator Copyright (C) 2012 Jaroslav Tulach

  * <jaroslav.tulach@apidesign.org>

  *

  * This program is free software: you can redistribute it and/or modify it under

  * the terms of the GNU General Public License as published by the Free Software

  * Foundation, version 2 of the License.

  *

  * This program is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more

  * details.

  *

  * You should have received a copy of the GNU General Public License along with

  * this program. Look for COPYING file in the top folder. If not, see

  * http://opensource.org/licenses/GPL-2.0.

  */

 package net.java.html.canvas.spi;

 import net.java.html.canvas.Dimension;

 import net.java.html.canvas.Image;

 import net.java.html.canvas.Style;

 /**

  * Provider API for Canvas. Implement this to add support for your platform.

  *

  * @author antonepple

  */

 public interface GraphicsEnvironment {

     public void arc(double centerX,

             double centerY,

             double startAngle,

             double radius,

             double endAngle,

             boolean ccw);

     public void arcTo(double x1,

             double y1,

             double x2,

             double y2,

             double r);

     public boolean isPointInPath(double x, double y);

     public void fill();

     public void stroke();

     public void beginPath();

     public void closePath();

     public void clip();

     public void moveTo(double x, double y);

     public void lineTo(double x, double y);

     public void quadraticCurveTo(double cpx, double cpy, double x, double y);

     public void bezierCurveTo(double cp1x, double cp1y, double cp2x, double cp2y, double x, double y);

     public void fillRect(double x, double y, double width, double height);

     public void strokeRect(double x, double y, double width, double height);

     public void clearRect(double x, double y, double width, double height);

     public void rect(double x, double y, double width, double height);

     public void save();

     public void restore();

     public void rotate(double angle);

     public void transform(double a, double b, double c, double d, double e, double f);

     public void setTransform(double a, double b, double c, double d, double e, double f);

     public void translate(double x, double y);

     public void scale(double x, double y);

     public Object drawImage(Image image, double x, double y, Object nativeImage);

     public Object drawImage(Image image, double x, double y, double width, double height, Object nativeImage);

     public Object drawImage(Image image, double sx, double sy, double sWidth, double sHeight, double x, double y, double width, double height, Object nativeImage);

     public int getWidth(Image image, Object nativeImage);

     public int getHeight(Image image, Object nativeImage);

     /**

      * When implementing you can return an Object of your choice to enable

      * caching. Returning null means no caching. When caching is enabled, and

      * the cache hasn't been invalidated, the Object you returned will be passed

      * as a parameter.

      *

      * @param style The style object you should use to create your native style

      * @param nativeStyle your native object if cached, null otherwise

      * @return return native Object for caching

      *

      */

     public Object setFillStyle(Style style, Object nativeStyle);

     /**

      * When implementing you can return an Object of your choice to enable

      * caching. Returning null means no caching. When caching is enabled, and

      * the cache hasn't been invalidated, the Object you returned will be passed

      * as a parameter.

      *

      * @param style The style object you should use to create your native style

      * @param nativeStyle your native object if cached, null otherwise

      * @return return native Object for caching

      *

      */

     public Object setStrokeStyle(Style style, Object nativeStyle);

 //    public void setShadowColor(String color);

 //

 //    public void setShadowBlur(double blur);

 //

 //    public void setShadowOffsetX(double x);

 //

 //    public void setShadowOffsetY(double y);

 //    

 //    public String getShadowColor();

 //

 //    public double getShadowBlur();

 //

 //    public double getShadowOffsetX();

 //

 //    public double getShadowOffsetY();

     /**

      * Gets the current stroke line cap.

      *

      * @return {@code StrokeLineCap} with a value of Butt, Round, or Square.

      */

     public String getLineCap();

     /**

      * Sets the current stroke line cap.

      *

      * @param style a value of Butt, Round, or Square.

      */

     public void setLineCap(String style);

     /**

      * Gets the current stroke line join.

      *

      * @return a value of Miter, Bevel, or Round.

      */

     public String getLineJoin();

     /**

      * Sets the current stroke line join.

      *

      * @param style with a value of Miter, Bevel, or Round.

      */

     public void setLineJoin(String style);

     /**

      * Gets the current line width.

      *

      * @return value between 0 and infinity.

      */

     public double getLineWidth();

     /**

      * Sets the current line width.

      *

      * @param width value in the range {0-positive infinity}, with any other

      * value being ignored and leaving the value unchanged.

      */

     public void setLineWidth(double width);

     /**

      * Gets the current miter limit. v

      *

      * @return the miter limit value in the range {@code 0.0-positive infinity}

      */

     public double getMiterLimit();

     /**

      * Sets the current miter limit.

      *

      * @param limit miter limit value between 0 and positive infinity with any

      * other value being ignored and leaving the value unchanged.

      */

     public void setMiterLimit(double limit);

     /**

      * Gets the current Font.

      *

      * @return the Font

      */

     public String getFont();

     /**

      * Sets the current Font.

      *

      */

     public void setFont(String font);

     /**

      * Gets the current {@code TextAlignment}.

      *

      * @return TextAlignment with values of Left, Center, Right, or Justify.

      */

     public String getTextAlign();

     /**

      * Defines horizontal text alignment, relative to the text origin.

      *

      * @param textAlign with values of Left, Center, Right.

      */

     public void setTextAlign(String textAlign);

     /**

      * Sets the current Text Baseline.

      *

      * @param baseline with values of Top, Center, Baseline, or Bottom

      */

     public String getTextBaseline();

     /**

      * Sets the current Text Baseline.

      *

      * @param baseline with values of Top, Center, Baseline, or Bottom

      */

     public void setTextBaseline(String baseline);

     /**

      * Fills the given string of text at position x, y (0,0 at top left) with

      * the current fill paint attribute.

      *

      * @param text the string of text.

      * @param x position on the x axis.

      * @param y position on the y axis.

      */

     public void fillText(String text, double x, double y);

     /**

      * Fills text and includes a maximum width of the string.

      *

      * If the width of the text extends past max width, then it will be sized to

      * fit.

      *

      * @param text the string of text.

      * @param x position on the x axis.

      * @param y position on the y axis.

      * @param maxWidth maximum width the text string can have.

      */

     public void fillText(String text, double x, double y, double maxWidth);

     /**

      * The Dimension of this text using the current Font settings

      *

      * @param text

      * @return the Dimension of this text using the current Font settings

      */

     public Dimension measureText(String text);

     /**

      * draws the given string of text at position x, y (0,0 at top left) with

      * the current stroke paint attribute.

      *

      * @param text the string of text.

      * @param x position on the x axis.

      * @param y position on the y axis.

      */

     public void strokeText(String text, double x, double y);

     /**

      * Draws text with stroke paint and includes a maximum width of the string.

      *

      * If the width of the text extends past max width, then it will be sized to

      * fit.

      *

      * @param text the string of text.

      * @param x position on the x axis.

      * @param y position on the y axis.

      * @param maxWidth maximum width the text string can have.

      */

     public void strokeText(String text, double x, double y, double maxWidth);

 //    public ImageData createPixelMap(double x, double y);

 //

 //    public ImageData createPixelMap(ImageData imageData);

 //

 //    public ImageData getPixelMap(double x, double y, double width, double height);

 //

 //    public void putPixelMap(ImageData imageData, double x, double y);

 //

 //    public void putPixelMap(ImageData imageData, double x, double y, double dirtyx, double dirtyy, double dirtywidth, double dirtyheight);

     /**

      * Sets the global alpha of the current state.

      *

      * @param alpha value in the range {@code 0.0-1.0}. The value is clamped if

      * it is out of range.

      */

     public void setGlobalAlpha(double alpha);

     public double getGlobalAlpha();

     public void setGlobalCompositeOperation(String operation);

     public String getGlobalCompositeOperation();

     public int getHeight();

     public int getWidth();

 //    public void setHeight(int height);

 //

 //    public void setWidth(int width);

     public Object mergeImages(Image a, Image b, Object cachedA, Object cachedB);

 }