зеркало из https://github.com/mozilla/gecko-dev.git
203 строки
7.0 KiB
C++
203 строки
7.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* The contents of this file are subject to the Netscape Public
|
|
* License Version 1.1 (the "License"); you may not use this file
|
|
* except in compliance with the License. You may obtain a copy of
|
|
* the License at http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS
|
|
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
|
|
* implied. See the License for the specific language governing
|
|
* rights and limitations under the License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is Netscape
|
|
* Communications Corporation. Portions created by Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All
|
|
* Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*/
|
|
|
|
#ifndef nsRenderingContextImpl_h___
|
|
#define nsRenderingContextImpl_h___
|
|
|
|
#include "nsIRenderingContext.h"
|
|
#include "nsPoint.h"
|
|
|
|
|
|
typedef struct {
|
|
double x; // x coordinate of edge's intersection with current scanline */
|
|
double dx; // change in x with respect to y
|
|
int i; // edge number: edge i goes from mPointList[i] to mPointList[i+1]
|
|
} Edge;
|
|
|
|
|
|
class nsRenderingContextImpl : public nsIRenderingContext
|
|
{
|
|
|
|
// CLASS MEMBERS
|
|
public:
|
|
|
|
|
|
protected:
|
|
nsTransform2D *mTranMatrix; // The rendering contexts transformation matrix
|
|
nsLineStyle mLineStyle; // The current linestyle, currenly used on mac, other platfroms to follow
|
|
int mAct; // number of active edges
|
|
Edge *mActive; // active edge list:edges crossing scanline y
|
|
|
|
public:
|
|
nsRenderingContextImpl();
|
|
|
|
|
|
// CLASS METHODS
|
|
/** ---------------------------------------------------
|
|
* See documentation in nsIRenderingContext.h
|
|
* @update 03/29/00 dwc
|
|
*/
|
|
NS_IMETHOD DrawTile(nsIImage *aImage,nscoord aX0,nscoord aY0,nscoord aX1,nscoord aY1,
|
|
nscoord aWidth,nscoord aHeight);
|
|
NS_IMETHOD DrawTile(nsIImage *aImage, nscoord aSrcXOffset,
|
|
nscoord aSrcYOffset, const nsRect &aTileRect);
|
|
/** ---------------------------------------------------
|
|
* See documentation in nsIRenderingContext.h
|
|
* @update 03/29/00 dwc
|
|
*/
|
|
NS_IMETHOD DrawPath(nsPathPoint aPointArray[],PRInt32 aNumPts);
|
|
|
|
/** ---------------------------------------------------
|
|
* See documentation in nsIRenderingContext.h
|
|
* @update 03/29/00 dwc
|
|
*/
|
|
NS_IMETHOD FillPath(nsPathPoint aPointArray[],PRInt32 aNumPts);
|
|
|
|
/**
|
|
* Fill a poly in the current foreground color
|
|
* @param aPoints points to use for the drawing, last must equal first
|
|
* @param aNumPonts number of points in the polygon
|
|
*/
|
|
NS_IMETHOD RasterPolygon(const nsPoint aPoints[], PRInt32 aNumPoints);
|
|
|
|
/** ---------------------------------------------------
|
|
* See documentation in nsIRenderingContext.h
|
|
* @update 05/01/00 dwc
|
|
*/
|
|
NS_IMETHOD DrawStdLine(nscoord aX0, nscoord aY0, nscoord aX1, nscoord aY1) { return NS_OK;}
|
|
|
|
/** ---------------------------------------------------
|
|
* See documentation in nsIRenderingContext.h
|
|
* @update 05/01/00 dwc
|
|
*/
|
|
NS_IMETHOD FillStdPolygon(const nsPoint aPoints[], PRInt32 aNumPoints) { return NS_OK; }
|
|
|
|
#ifdef USE_IMG2
|
|
NS_IMETHOD DrawImage(imgIContainer *aImage, const nsRect * aSrcRect, const nsPoint * aDestPoint);
|
|
NS_IMETHOD DrawScaledImage(imgIContainer *aImage, const nsRect * aSrcRect, const nsRect * aDestRect);
|
|
NS_IMETHOD DrawTile(imgIContainer *aImage, nscoord aXOffset, nscoord aYOffset, const nsRect * aTargetRect);
|
|
NS_IMETHOD DrawScaledTile(imgIContainer *aImage, nscoord aXOffset, nscoord aYOffset, nscoord aTileWidth, nscoord aTileHeight, const nsRect * aTargetRect);
|
|
#endif
|
|
|
|
|
|
protected:
|
|
virtual ~nsRenderingContextImpl();
|
|
|
|
/** ---------------------------------------------------
|
|
* Check to see if the given size of tile can be imaged by the RenderingContext
|
|
* @update 03/29/00 dwc
|
|
* @param aWidth The width of the tile
|
|
* @param aHeight The height of the tile
|
|
* @return PR_TRUE the RenderingContext can handle this tile
|
|
*/
|
|
virtual PRBool CanTile(nscoord aWidth,nscoord aHeight) { return PR_FALSE; }
|
|
|
|
|
|
/** ---------------------------------------------------
|
|
* A bit blitter to tile images to the background recursively
|
|
* @update 3/29/00 dwc
|
|
* @param aDS -- Target drawing surface for the rendering context
|
|
* @param aSrcRect -- Rectangle we are build with the image
|
|
* @param aHeight -- height of the tile
|
|
* @param aWidth -- width of the tile
|
|
*/
|
|
void TileImage(nsDrawingSurface aDS,nsRect &aSrcRect,PRInt16 aWidth,PRInt16 aHeight);
|
|
|
|
void cdelete(int i);
|
|
void cinsert(int i,int y,const nsPoint aPointArray[],PRInt32 aNumPts);
|
|
|
|
public:
|
|
|
|
};
|
|
|
|
|
|
/** ---------------------------------------------------
|
|
* Class QBezierCurve, a quadratic bezier curve
|
|
* @update 4/27/2000 dwc
|
|
*/
|
|
class QBezierCurve
|
|
{
|
|
|
|
public:
|
|
nsFloatPoint mAnc1;
|
|
nsFloatPoint mCon;
|
|
nsFloatPoint mAnc2;
|
|
|
|
QBezierCurve() {mAnc1.x=0;mAnc1.y=0;mCon=mAnc2=mAnc1;}
|
|
void SetControls(nsFloatPoint &aAnc1,nsFloatPoint &aCon,nsFloatPoint &aAnc2) { mAnc1 = aAnc1; mCon = aCon; mAnc2 = aAnc2;}
|
|
void SetPoints(nscoord a1x,nscoord a1y,nscoord acx,nscoord acy,nscoord a2x,nscoord a2y) {mAnc1.MoveTo(a1x,a1y),mCon.MoveTo(acx,acy),mAnc2.MoveTo(a2x,a2y);}
|
|
void SetPoints(float a1x,float a1y,float acx,float acy,float a2x,float a2y) {mAnc1.MoveTo(a1x,a1y),mCon.MoveTo(acx,acy),mAnc2.MoveTo(a2x,a2y);}
|
|
void DebugPrint();
|
|
/** ---------------------------------------------------
|
|
* Divide a Quadratic curve into line segments if it is not smaller than a certain size
|
|
* else it is so small that it can be approximated by 2 lineto calls
|
|
* @param aRenderingContext -- The RenderingContext to use to draw with
|
|
* @update 3/26/99 dwc
|
|
*/
|
|
void SubDivide(nsIRenderingContext *aRenderingContext);
|
|
|
|
/** ---------------------------------------------------
|
|
* Divide a Quadratic curve into line segments if it is not smaller than a certain size
|
|
* else it is so small that it can be approximated by 2 lineto calls
|
|
* @param nsPoint* -- The points array to rasterize into
|
|
* @param aNumPts* -- Current number of points in this array
|
|
* @update 3/26/99 dwc
|
|
*/
|
|
void SubDivide(nsPoint aThePoints[],PRInt16 *aNumPts);
|
|
|
|
/** ---------------------------------------------------
|
|
* Divide a Quadratic Bezier curve at the mid-point
|
|
* @update 3/26/99 dwc
|
|
* @param aCurve1 -- Curve 1 as a result of the division
|
|
* @param aCurve2 -- Curve 2 as a result of the division
|
|
*/
|
|
void MidPointDivide(QBezierCurve *A,QBezierCurve *B);
|
|
};
|
|
|
|
enum eSegType {eUNDEF,eLINE,eQCURVE,eCCURVE};
|
|
|
|
|
|
/** ---------------------------------------------------
|
|
* A class to iterate through a nsPathPoint array and return segments
|
|
* @update 04/27/00 dwc
|
|
*/
|
|
class nsPathIter {
|
|
|
|
public:
|
|
enum eSegType {eUNDEF,eLINE,eQCURVE,eCCURVE};
|
|
|
|
private:
|
|
PRUint32 mCurPoint;
|
|
PRUint32 mNumPoints;
|
|
nsPathPoint *mThePath;
|
|
|
|
public:
|
|
nsPathIter();
|
|
nsPathIter(nsPathPoint* aThePath,PRUint32 aNumPts);
|
|
|
|
PRBool NextSeg(QBezierCurve& TheSegment,eSegType& aCurveType);
|
|
|
|
};
|
|
|
|
|
|
#endif /* nsRenderingContextImpl */
|