mirror of
https://github.com/mozilla/gecko-dev.git
synced 2025-02-13 11:38:16 +00:00
Added some methods for Tiling backgrounds.
This commit is contained in:
dcone%netscape.com
parent
c7825191f2
commit
cdd098a3ed
@ -21,14 +21,25 @@
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*/
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#include "nsRenderingContextImpl.h"
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#include "nsIDeviceContext.h"
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#include "nsIImage.h"
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#include "nsTransform2D.h"
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/** ---------------------------------------------------
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* See documentation in nsIRenderingContext.h
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* @update 3/16/00 dwc
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*/
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nsRenderingContextImpl :: nsRenderingContextImpl()
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{
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}
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/** ---------------------------------------------------
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* See documentation in nsIRenderingContext.h
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* @update 3/16/00 dwc
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*/
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nsRenderingContextImpl :: ~nsRenderingContextImpl()
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{
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@ -36,3 +47,122 @@ nsRenderingContextImpl :: ~nsRenderingContextImpl()
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}
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/** ---------------------------------------------------
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* See documentation in nsIRenderingContext.h
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* @update 3/29/00 dwc
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*/
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NS_IMETHODIMP
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nsRenderingContextImpl::DrawTile(nsIImage *aImage,nscoord aX0,nscoord aY0,nscoord aX1,nscoord aY1,
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nscoord aWidth,nscoord aHeight)
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{
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PRBool hasMask,clip;
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nscoord x,y;
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nsRect srcRect,destRect,vrect,tvrect;
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PRInt32 flag = NS_COPYBITS_TO_BACK_BUFFER | NS_COPYBITS_XFORM_DEST_VALUES;
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PRUint32 dsFlag = 0;
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nsIDrawingSurface *theSurface,*ts=nsnull;
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float t2p,app2dev;
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nsIDeviceContext *theDevCon;
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nsTransform2D *theTransform;
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// we have to do things ourselves
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hasMask = aImage->GetHasAlphaMask();
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tvrect.SetRect(0,0,aX1-aX0,aY1-aY0);
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if( !hasMask && ((aWidth<(tvrect.width/16)) || (aHeight<(tvrect.height/16)))) {
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// create a larger tile to use
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GetDeviceContext(theDevCon);
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theDevCon->GetTwipsToDevUnits(t2p);
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this->GetDrawingSurface((void**)&theSurface);
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tvrect.width = ((tvrect.width)/aWidth);
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tvrect.width *=aWidth;
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tvrect.height = ((tvrect.height)/aHeight);
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tvrect.height *=aHeight;
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// create a new drawing surface... using pixels as the size
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vrect.height = (nscoord)(tvrect.height * t2p);
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vrect.width = (nscoord)(tvrect.width * t2p);
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this->CreateDrawingSurface(&vrect,dsFlag,(nsDrawingSurface&)ts);
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if (nsnull != ts) {
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this->SelectOffScreenDrawingSurface(ts);
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// create a bigger tile in our new drawingsurface
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// XXX pushing state to fix clipping problem, need to look into why the clip is set here
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this->PushState();
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this->GetCurrentTransform(theTransform);
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theDevCon->GetAppUnitsToDevUnits(app2dev);
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theTransform->SetToIdentity();
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theTransform->AddScale(app2dev, app2dev);
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// copy the initial image to our buffer, this takes twips and converts to pixels..
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// which is what the image is in
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this->DrawImage(aImage,0,0,aWidth,aHeight);
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// duplicate the image in the upperleft corner to fill up the nsDrawingSurface
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srcRect.SetRect(0,0,aWidth,aHeight);
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TileImage(ts,srcRect,tvrect.width,tvrect.height);
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// setting back the clip from the background clip push
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this->PopState(clip);
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// set back to the old drawingsurface
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this->SelectOffScreenDrawingSurface((void**)theSurface);
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// now duplicate our tile into the background
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destRect = srcRect;
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for(y=aY0;y<aY1;y+=tvrect.height){
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for(x=aX0;x<aX1;x+=tvrect.width){
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destRect.x = x;
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destRect.y = y;
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this->CopyOffScreenBits(ts,0,0,destRect,flag);
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}
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}
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this->DestroyDrawingSurface(ts);
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}
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NS_RELEASE(theDevCon);
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} else {
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// slow blitting, one tile at a time.... ( will create a mask and fall into code below -next task-)
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for(y=aY0;y<aY1;y+=aHeight){
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for(x=aX0;x<aX1;x+=aWidth){
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this->DrawImage(aImage,x,y,aWidth,aHeight);
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}
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}
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}
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return NS_OK;
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}
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/** ---------------------------------------------------
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* See documentation in nsRenderingContextImpl.h
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* @update 3/29/00 dwc
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*/
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void
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nsRenderingContextImpl::TileImage(nsDrawingSurface aDS,nsRect &aSrcRect,PRInt16 aWidth,PRInt16 aHeight)
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{
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nsRect destRect;
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PRInt32 flag = NS_COPYBITS_TO_BACK_BUFFER | NS_COPYBITS_XFORM_DEST_VALUES;
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if( aSrcRect.width < aWidth) {
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// width is less than double so double our source bitmap width
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destRect = aSrcRect;
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destRect.x += aSrcRect.width;
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this->CopyOffScreenBits(aDS,aSrcRect.x,aSrcRect.y,destRect,flag);
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aSrcRect.width*=2;
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TileImage(aDS,aSrcRect,aWidth,aHeight);
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} else if (aSrcRect.height < aHeight) {
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// height is less than double so double our source bitmap height
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destRect = aSrcRect;
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destRect.y += aSrcRect.height;
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this->CopyOffScreenBits(aDS,aSrcRect.x,aSrcRect.y,destRect,flag);
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aSrcRect.height*=2;
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TileImage(aDS,aSrcRect,aWidth,aHeight);
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}
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}
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@ -21,14 +21,25 @@
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*/
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#include "nsRenderingContextImpl.h"
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#include "nsIDeviceContext.h"
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#include "nsIImage.h"
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#include "nsTransform2D.h"
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/** ---------------------------------------------------
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* See documentation in nsIRenderingContext.h
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* @update 3/16/00 dwc
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*/
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nsRenderingContextImpl :: nsRenderingContextImpl()
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{
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}
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/** ---------------------------------------------------
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* See documentation in nsIRenderingContext.h
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* @update 3/16/00 dwc
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*/
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nsRenderingContextImpl :: ~nsRenderingContextImpl()
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{
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@ -36,3 +47,122 @@ nsRenderingContextImpl :: ~nsRenderingContextImpl()
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}
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/** ---------------------------------------------------
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* See documentation in nsIRenderingContext.h
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* @update 3/29/00 dwc
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*/
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NS_IMETHODIMP
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nsRenderingContextImpl::DrawTile(nsIImage *aImage,nscoord aX0,nscoord aY0,nscoord aX1,nscoord aY1,
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nscoord aWidth,nscoord aHeight)
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{
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PRBool hasMask,clip;
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nscoord x,y;
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nsRect srcRect,destRect,vrect,tvrect;
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PRInt32 flag = NS_COPYBITS_TO_BACK_BUFFER | NS_COPYBITS_XFORM_DEST_VALUES;
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PRUint32 dsFlag = 0;
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nsIDrawingSurface *theSurface,*ts=nsnull;
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float t2p,app2dev;
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nsIDeviceContext *theDevCon;
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nsTransform2D *theTransform;
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// we have to do things ourselves
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hasMask = aImage->GetHasAlphaMask();
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tvrect.SetRect(0,0,aX1-aX0,aY1-aY0);
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if( !hasMask && ((aWidth<(tvrect.width/16)) || (aHeight<(tvrect.height/16)))) {
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// create a larger tile to use
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GetDeviceContext(theDevCon);
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theDevCon->GetTwipsToDevUnits(t2p);
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this->GetDrawingSurface((void**)&theSurface);
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tvrect.width = ((tvrect.width)/aWidth);
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tvrect.width *=aWidth;
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tvrect.height = ((tvrect.height)/aHeight);
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tvrect.height *=aHeight;
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// create a new drawing surface... using pixels as the size
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vrect.height = (nscoord)(tvrect.height * t2p);
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vrect.width = (nscoord)(tvrect.width * t2p);
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this->CreateDrawingSurface(&vrect,dsFlag,(nsDrawingSurface&)ts);
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if (nsnull != ts) {
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this->SelectOffScreenDrawingSurface(ts);
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// create a bigger tile in our new drawingsurface
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// XXX pushing state to fix clipping problem, need to look into why the clip is set here
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this->PushState();
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this->GetCurrentTransform(theTransform);
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theDevCon->GetAppUnitsToDevUnits(app2dev);
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theTransform->SetToIdentity();
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theTransform->AddScale(app2dev, app2dev);
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// copy the initial image to our buffer, this takes twips and converts to pixels..
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// which is what the image is in
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this->DrawImage(aImage,0,0,aWidth,aHeight);
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// duplicate the image in the upperleft corner to fill up the nsDrawingSurface
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srcRect.SetRect(0,0,aWidth,aHeight);
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TileImage(ts,srcRect,tvrect.width,tvrect.height);
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// setting back the clip from the background clip push
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this->PopState(clip);
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// set back to the old drawingsurface
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this->SelectOffScreenDrawingSurface((void**)theSurface);
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// now duplicate our tile into the background
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destRect = srcRect;
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for(y=aY0;y<aY1;y+=tvrect.height){
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for(x=aX0;x<aX1;x+=tvrect.width){
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destRect.x = x;
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destRect.y = y;
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this->CopyOffScreenBits(ts,0,0,destRect,flag);
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}
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}
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this->DestroyDrawingSurface(ts);
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}
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NS_RELEASE(theDevCon);
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} else {
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// slow blitting, one tile at a time.... ( will create a mask and fall into code below -next task-)
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for(y=aY0;y<aY1;y+=aHeight){
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for(x=aX0;x<aX1;x+=aWidth){
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this->DrawImage(aImage,x,y,aWidth,aHeight);
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}
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}
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}
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return NS_OK;
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}
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/** ---------------------------------------------------
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* See documentation in nsRenderingContextImpl.h
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* @update 3/29/00 dwc
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*/
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void
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nsRenderingContextImpl::TileImage(nsDrawingSurface aDS,nsRect &aSrcRect,PRInt16 aWidth,PRInt16 aHeight)
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{
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nsRect destRect;
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PRInt32 flag = NS_COPYBITS_TO_BACK_BUFFER | NS_COPYBITS_XFORM_DEST_VALUES;
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if( aSrcRect.width < aWidth) {
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// width is less than double so double our source bitmap width
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destRect = aSrcRect;
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destRect.x += aSrcRect.width;
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this->CopyOffScreenBits(aDS,aSrcRect.x,aSrcRect.y,destRect,flag);
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aSrcRect.width*=2;
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TileImage(aDS,aSrcRect,aWidth,aHeight);
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} else if (aSrcRect.height < aHeight) {
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// height is less than double so double our source bitmap height
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destRect = aSrcRect;
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destRect.y += aSrcRect.height;
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this->CopyOffScreenBits(aDS,aSrcRect.x,aSrcRect.y,destRect,flag);
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aSrcRect.height*=2;
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TileImage(aDS,aSrcRect,aWidth,aHeight);
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}
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}
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