mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
93793566d0
This patch shouldn't change any behavior. It just passes the ContainerParameters around, which will contain scale factors that should have been applied when BuildLayer returns a ContainerLayer. This patch also adds an aTransform parameter to BuildContainerLayerFor, which nsDisplayTransform uses to set the transform for the ContainerLayer. This way BuildContainerLayerFor knows what the container's transform is going to be before constructing the children, which in the next patch will let us construct the children with the right resolution.
372 lines
12 KiB
C++
372 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Vladimir Vukicevic <vladimir@pobox.com>
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* Portions created by the Initial Developer are Copyright (C) 2004
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Vladimir Vukicevic <vladimir@pobox.com> (original author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* rendering object for the HTML <canvas> element */
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#include "nsHTMLParts.h"
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#include "nsCOMPtr.h"
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#include "nsIServiceManager.h"
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#include "nsGkAtoms.h"
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#include "nsHTMLCanvasFrame.h"
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#include "nsHTMLCanvasElement.h"
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#include "nsDisplayList.h"
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#include "nsLayoutUtils.h"
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#include "nsTransform2D.h"
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#include "gfxContext.h"
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using namespace mozilla;
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using namespace mozilla::layers;
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static nsHTMLCanvasElement *
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CanvasElementFromContent(nsIContent *content)
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{
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nsCOMPtr<nsIDOMHTMLCanvasElement> domCanvas(do_QueryInterface(content));
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return domCanvas ? static_cast<nsHTMLCanvasElement*>(domCanvas.get()) : nsnull;
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}
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class nsDisplayCanvas : public nsDisplayItem {
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public:
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nsDisplayCanvas(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
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: nsDisplayItem(aBuilder, aFrame)
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{
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MOZ_COUNT_CTOR(nsDisplayCanvas);
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}
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#ifdef NS_BUILD_REFCNT_LOGGING
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virtual ~nsDisplayCanvas() {
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MOZ_COUNT_DTOR(nsDisplayCanvas);
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}
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#endif
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NS_DISPLAY_DECL_NAME("nsDisplayCanvas", TYPE_CANVAS)
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virtual nsRegion GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
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PRBool* aForceTransparentSurface = nsnull) {
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if (aForceTransparentSurface) {
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*aForceTransparentSurface = PR_FALSE;
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}
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nsIFrame* f = GetUnderlyingFrame();
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nsHTMLCanvasElement *canvas = CanvasElementFromContent(f->GetContent());
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nsRegion result;
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if (canvas->GetIsOpaque()) {
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result = GetBounds(aBuilder);
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}
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return result;
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}
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virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder) {
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nsHTMLCanvasFrame* f = static_cast<nsHTMLCanvasFrame*>(GetUnderlyingFrame());
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return f->GetInnerArea() + ToReferenceFrame();
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}
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virtual already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager,
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const ContainerParameters& aContainerParameters)
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{
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return static_cast<nsHTMLCanvasFrame*>(mFrame)->
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BuildLayer(aBuilder, aManager, this);
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}
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virtual LayerState GetLayerState(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager)
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{
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// If compositing is cheap, just do that
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if (aManager->IsCompositingCheap())
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return mozilla::LAYER_ACTIVE;
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return mFrame->AreLayersMarkedActive() ? LAYER_ACTIVE : LAYER_INACTIVE;
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}
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};
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nsIFrame*
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NS_NewHTMLCanvasFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsHTMLCanvasFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsHTMLCanvasFrame)
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NS_IMETHODIMP
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nsHTMLCanvasFrame::Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow)
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{
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nsresult rv = nsSplittableFrame::Init(aContent, aParent, aPrevInFlow);
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// We can fill in the canvas before the canvas frame is created, in
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// which case we never get around to marking the layer active. Therefore,
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// we mark it active here when we create the frame.
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MarkLayersActive();
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return rv;
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}
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nsHTMLCanvasFrame::~nsHTMLCanvasFrame()
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{
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}
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nsIntSize
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nsHTMLCanvasFrame::GetCanvasSize()
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{
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nsIntSize size(0,0);
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nsHTMLCanvasElement *canvas = CanvasElementFromContent(GetContent());
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if (canvas) {
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size = canvas->GetSize();
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} else {
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NS_NOTREACHED("couldn't get canvas size");
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}
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return size;
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}
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/* virtual */ nscoord
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nsHTMLCanvasFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
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{
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// XXX The caller doesn't account for constraints of the height,
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// min-height, and max-height properties.
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nscoord result = nsPresContext::CSSPixelsToAppUnits(GetCanvasSize().width);
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DISPLAY_MIN_WIDTH(this, result);
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return result;
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}
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/* virtual */ nscoord
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nsHTMLCanvasFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
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{
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// XXX The caller doesn't account for constraints of the height,
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// min-height, and max-height properties.
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nscoord result = nsPresContext::CSSPixelsToAppUnits(GetCanvasSize().width);
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DISPLAY_PREF_WIDTH(this, result);
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return result;
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}
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/* virtual */ nsSize
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nsHTMLCanvasFrame::GetIntrinsicRatio()
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{
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nsIntSize size(GetCanvasSize());
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return nsSize(nsPresContext::CSSPixelsToAppUnits(size.width),
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nsPresContext::CSSPixelsToAppUnits(size.height));
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}
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/* virtual */ nsSize
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nsHTMLCanvasFrame::ComputeSize(nsRenderingContext *aRenderingContext,
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nsSize aCBSize, nscoord aAvailableWidth,
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nsSize aMargin, nsSize aBorder, nsSize aPadding,
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PRBool aShrinkWrap)
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{
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nsIntSize size = GetCanvasSize();
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IntrinsicSize intrinsicSize;
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intrinsicSize.width.SetCoordValue(nsPresContext::CSSPixelsToAppUnits(size.width));
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intrinsicSize.height.SetCoordValue(nsPresContext::CSSPixelsToAppUnits(size.height));
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nsSize intrinsicRatio = GetIntrinsicRatio(); // won't actually be used
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return nsLayoutUtils::ComputeSizeWithIntrinsicDimensions(
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aRenderingContext, this,
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intrinsicSize, intrinsicRatio, aCBSize,
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aMargin, aBorder, aPadding);
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}
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NS_IMETHODIMP
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nsHTMLCanvasFrame::Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aMetrics,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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DO_GLOBAL_REFLOW_COUNT("nsHTMLCanvasFrame");
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DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
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NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
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("enter nsHTMLCanvasFrame::Reflow: availSize=%d,%d",
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aReflowState.availableWidth, aReflowState.availableHeight));
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NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
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aStatus = NS_FRAME_COMPLETE;
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aMetrics.width = aReflowState.ComputedWidth();
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aMetrics.height = aReflowState.ComputedHeight();
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// stash this away so we can compute our inner area later
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mBorderPadding = aReflowState.mComputedBorderPadding;
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aMetrics.width += mBorderPadding.left + mBorderPadding.right;
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aMetrics.height += mBorderPadding.top + mBorderPadding.bottom;
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if (GetPrevInFlow()) {
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nscoord y = GetContinuationOffset(&aMetrics.width);
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aMetrics.height -= y + mBorderPadding.top;
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aMetrics.height = NS_MAX(0, aMetrics.height);
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}
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aMetrics.SetOverflowAreasToDesiredBounds();
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FinishAndStoreOverflow(&aMetrics);
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if (mRect.width != aMetrics.width || mRect.height != aMetrics.height) {
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Invalidate(nsRect(0, 0, mRect.width, mRect.height));
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}
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NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
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("exit nsHTMLCanvasFrame::Reflow: size=%d,%d",
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aMetrics.width, aMetrics.height));
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NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
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return NS_OK;
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}
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// FIXME taken from nsImageFrame, but then had splittable frame stuff
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// removed. That needs to be fixed.
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nsRect
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nsHTMLCanvasFrame::GetInnerArea() const
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{
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nsRect r;
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r.x = mBorderPadding.left;
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r.y = mBorderPadding.top;
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r.width = mRect.width - mBorderPadding.left - mBorderPadding.right;
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r.height = mRect.height - mBorderPadding.top - mBorderPadding.bottom;
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return r;
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}
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already_AddRefed<Layer>
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nsHTMLCanvasFrame::BuildLayer(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager,
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nsDisplayItem* aItem)
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{
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nsRect area = GetContentRect() - GetPosition() + aItem->ToReferenceFrame();
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nsHTMLCanvasElement* element = static_cast<nsHTMLCanvasElement*>(GetContent());
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nsIntSize canvasSize = GetCanvasSize();
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if (canvasSize.width <= 0 || canvasSize.height <= 0 || area.IsEmpty())
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return nsnull;
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CanvasLayer* oldLayer = static_cast<CanvasLayer*>
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(aBuilder->LayerBuilder()->GetLeafLayerFor(aBuilder, aManager, aItem));
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nsRefPtr<CanvasLayer> layer = element->GetCanvasLayer(aBuilder, oldLayer, aManager);
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if (!layer)
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return nsnull;
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nsPresContext* presContext = PresContext();
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gfxRect r = gfxRect(presContext->AppUnitsToGfxUnits(area.x),
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presContext->AppUnitsToGfxUnits(area.y),
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presContext->AppUnitsToGfxUnits(area.width),
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presContext->AppUnitsToGfxUnits(area.height));
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// Transform the canvas into the right place
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gfxMatrix transform;
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transform.Translate(r.TopLeft());
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transform.Scale(r.Width()/canvasSize.width, r.Height()/canvasSize.height);
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layer->SetTransform(gfx3DMatrix::From2D(transform));
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layer->SetFilter(nsLayoutUtils::GetGraphicsFilterForFrame(this));
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layer->SetVisibleRegion(nsIntRect(0, 0, canvasSize.width, canvasSize.height));
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return layer.forget();
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}
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NS_IMETHODIMP
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nsHTMLCanvasFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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if (!IsVisibleForPainting(aBuilder))
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return NS_OK;
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nsresult rv = DisplayBorderBackgroundOutline(aBuilder, aLists);
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NS_ENSURE_SUCCESS(rv, rv);
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nsDisplayList replacedContent;
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rv = replacedContent.AppendNewToTop(
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new (aBuilder) nsDisplayCanvas(aBuilder, this));
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NS_ENSURE_SUCCESS(rv, rv);
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rv = DisplaySelectionOverlay(aBuilder, &replacedContent,
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nsISelectionDisplay::DISPLAY_IMAGES);
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NS_ENSURE_SUCCESS(rv, rv);
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WrapReplacedContentForBorderRadius(aBuilder, &replacedContent, aLists);
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return NS_OK;
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}
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nsIAtom*
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nsHTMLCanvasFrame::GetType() const
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{
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return nsGkAtoms::HTMLCanvasFrame;
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}
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// get the offset into the content area of the image where aImg starts if it is a continuation.
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// from nsImageFrame
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nscoord
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nsHTMLCanvasFrame::GetContinuationOffset(nscoord* aWidth) const
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{
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nscoord offset = 0;
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if (aWidth) {
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*aWidth = 0;
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}
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if (GetPrevInFlow()) {
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for (nsIFrame* prevInFlow = GetPrevInFlow() ; prevInFlow; prevInFlow = prevInFlow->GetPrevInFlow()) {
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nsRect rect = prevInFlow->GetRect();
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if (aWidth) {
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*aWidth = rect.width;
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}
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offset += rect.height;
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}
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offset -= mBorderPadding.top;
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offset = NS_MAX(0, offset);
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}
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return offset;
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}
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#ifdef ACCESSIBILITY
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already_AddRefed<nsAccessible>
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nsHTMLCanvasFrame::CreateAccessible()
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{
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return nsnull;
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}
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#endif
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#ifdef DEBUG
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NS_IMETHODIMP
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nsHTMLCanvasFrame::GetFrameName(nsAString& aResult) const
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{
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return MakeFrameName(NS_LITERAL_STRING("HTMLCanvas"), aResult);
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}
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#endif
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