/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ // vim:cindent:ts=2:et:sw=2: /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla 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/MPL/ * * 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 the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Mats Palmgren * Takeshi Ichimaru * Masayuki Nakano * L. David Baron , Mozilla Corporation * Michael Ventnor * Rob Arnold * * Alternatively, the contents of this file may be used under the terms of * either of the GNU General Public License Version 2 or later (the "GPL"), * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ /* utility functions for drawing borders and backgrounds */ #include "nsStyleConsts.h" #include "nsPresContext.h" #include "nsIImage.h" #include "nsIFrame.h" #include "nsPoint.h" #include "nsRect.h" #include "nsIViewManager.h" #include "nsIPresShell.h" #include "nsFrameManager.h" #include "nsStyleContext.h" #include "nsGkAtoms.h" #include "nsCSSAnonBoxes.h" #include "nsTransform2D.h" #include "nsIDeviceContext.h" #include "nsIContent.h" #include "nsIDocument.h" #include "nsIScrollableFrame.h" #include "imgIRequest.h" #include "imgIContainer.h" #include "gfxIImageFrame.h" #include "nsCSSRendering.h" #include "nsCSSColorUtils.h" #include "nsITheme.h" #include "nsThemeConstants.h" #include "nsIServiceManager.h" #include "nsIHTMLDocument.h" #include "nsLayoutUtils.h" #include "nsINameSpaceManager.h" #include "nsBlockFrame.h" #include "gfxContext.h" #include "nsIInterfaceRequestorUtils.h" #include "gfxPlatform.h" #include "gfxImageSurface.h" #include "nsStyleStructInlines.h" #include "nsCSSFrameConstructor.h" #include "nsCSSRenderingBorders.h" // To avoid storing this data on nsInlineFrame (bloat) and to avoid // recalculating this for each frame in a continuation (perf), hold // a cache of various coordinate information that we need in order // to paint inline backgrounds. struct InlineBackgroundData { InlineBackgroundData() : mFrame(nsnull), mBlockFrame(nsnull) { } ~InlineBackgroundData() { } void Reset() { mBoundingBox.SetRect(0,0,0,0); mContinuationPoint = mLineContinuationPoint = mUnbrokenWidth = 0; mFrame = mBlockFrame = nsnull; } nsRect GetContinuousRect(nsIFrame* aFrame) { SetFrame(aFrame); nscoord x; if (mBidiEnabled) { x = mLineContinuationPoint; // Scan continuations on the same line as aFrame and accumulate the widths // of frames that are to the left (if this is an LTR block) or right // (if it's RTL) of the current one. PRBool isRtlBlock = (mBlockFrame->GetStyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL); nscoord curOffset = aFrame->GetOffsetTo(mBlockFrame).x; // No need to use our GetPrevContinuation/GetNextContinuation methods // here, since ib special siblings are certainly not on the same line. nsIFrame* inlineFrame = aFrame->GetPrevContinuation(); // If the continuation is fluid we know inlineFrame is not on the same line. // If it's not fluid, we need to test further to be sure. while (inlineFrame && !inlineFrame->GetNextInFlow() && AreOnSameLine(aFrame, inlineFrame)) { nscoord frameXOffset = inlineFrame->GetOffsetTo(mBlockFrame).x; if(isRtlBlock == (frameXOffset >= curOffset)) { x += inlineFrame->GetSize().width; } inlineFrame = inlineFrame->GetPrevContinuation(); } inlineFrame = aFrame->GetNextContinuation(); while (inlineFrame && !inlineFrame->GetPrevInFlow() && AreOnSameLine(aFrame, inlineFrame)) { nscoord frameXOffset = inlineFrame->GetOffsetTo(mBlockFrame).x; if(isRtlBlock == (frameXOffset >= curOffset)) { x += inlineFrame->GetSize().width; } inlineFrame = inlineFrame->GetNextContinuation(); } if (isRtlBlock) { // aFrame itself is also to the right of its left edge, so add its width. x += aFrame->GetSize().width; // x is now the distance from the left edge of aFrame to the right edge // of the unbroken content. Change it to indicate the distance from the // left edge of the unbroken content to the left edge of aFrame. x = mUnbrokenWidth - x; } } else { x = mContinuationPoint; } // Assume background-origin: border and return a rect with offsets // relative to (0,0). If we have a different background-origin, // then our rect should be deflated appropriately by our caller. return nsRect(-x, 0, mUnbrokenWidth, mFrame->GetSize().height); } nsRect GetBoundingRect(nsIFrame* aFrame) { SetFrame(aFrame); // Move the offsets relative to (0,0) which puts the bounding box into // our coordinate system rather than our parent's. We do this by // moving it the back distance from us to the bounding box. // This also assumes background-origin: border, so our caller will // need to deflate us if needed. nsRect boundingBox(mBoundingBox); nsPoint point = mFrame->GetPosition(); boundingBox.MoveBy(-point.x, -point.y); return boundingBox; } protected: nsIFrame* mFrame; nscoord mContinuationPoint; nscoord mUnbrokenWidth; nsRect mBoundingBox; PRBool mBidiEnabled; nsBlockFrame* mBlockFrame; nscoord mLineContinuationPoint; void SetFrame(nsIFrame* aFrame) { NS_PRECONDITION(aFrame, "Need a frame"); nsIFrame *prevContinuation = GetPrevContinuation(aFrame); if (!prevContinuation || mFrame != prevContinuation) { // Ok, we've got the wrong frame. We have to start from scratch. Reset(); Init(aFrame); return; } // Get our last frame's size and add its width to our continuation // point before we cache the new frame. mContinuationPoint += mFrame->GetSize().width; // If this a new line, update mLineContinuationPoint. if (mBidiEnabled && (aFrame->GetPrevInFlow() || !AreOnSameLine(mFrame, aFrame))) { mLineContinuationPoint = mContinuationPoint; } mFrame = aFrame; } nsIFrame* GetPrevContinuation(nsIFrame* aFrame) { nsIFrame* prevCont = aFrame->GetPrevContinuation(); if (!prevCont && (aFrame->GetStateBits() && NS_FRAME_IS_SPECIAL)) { nsIFrame* block = static_cast (aFrame->GetProperty(nsGkAtoms::IBSplitSpecialPrevSibling)); if (block) { // The {ib} properties are only stored on first continuations block = block->GetFirstContinuation(); prevCont = static_cast (block->GetProperty(nsGkAtoms::IBSplitSpecialPrevSibling)); NS_ASSERTION(prevCont, "How did that happen?"); } } return prevCont; } nsIFrame* GetNextContinuation(nsIFrame* aFrame) { nsIFrame* nextCont = aFrame->GetNextContinuation(); if (!nextCont && (aFrame->GetStateBits() && NS_FRAME_IS_SPECIAL)) { // The {ib} properties are only stored on first continuations aFrame = aFrame->GetFirstContinuation(); nsIFrame* block = static_cast (aFrame->GetProperty(nsGkAtoms::IBSplitSpecialSibling)); if (block) { nextCont = static_cast (block->GetProperty(nsGkAtoms::IBSplitSpecialSibling)); NS_ASSERTION(nextCont, "How did that happen?"); } } return nextCont; } void Init(nsIFrame* aFrame) { // Start with the previous flow frame as our continuation point // is the total of the widths of the previous frames. nsIFrame* inlineFrame = GetPrevContinuation(aFrame); while (inlineFrame) { nsRect rect = inlineFrame->GetRect(); mContinuationPoint += rect.width; mUnbrokenWidth += rect.width; mBoundingBox.UnionRect(mBoundingBox, rect); inlineFrame = GetPrevContinuation(inlineFrame); } // Next add this frame and subsequent frames to the bounding box and // unbroken width. inlineFrame = aFrame; while (inlineFrame) { nsRect rect = inlineFrame->GetRect(); mUnbrokenWidth += rect.width; mBoundingBox.UnionRect(mBoundingBox, rect); inlineFrame = GetNextContinuation(inlineFrame); } mFrame = aFrame; mBidiEnabled = aFrame->PresContext()->BidiEnabled(); if (mBidiEnabled) { // Find the containing block frame nsIFrame* frame = aFrame; do { frame = frame->GetParent(); mBlockFrame = do_QueryFrame(frame); } while (frame && frame->IsFrameOfType(nsIFrame::eLineParticipant)); NS_ASSERTION(mBlockFrame, "Cannot find containing block."); mLineContinuationPoint = mContinuationPoint; } } PRBool AreOnSameLine(nsIFrame* aFrame1, nsIFrame* aFrame2) { // Assumes that aFrame1 and aFrame2 are both decsendants of mBlockFrame. PRBool isValid1, isValid2; nsBlockInFlowLineIterator it1(mBlockFrame, aFrame1, &isValid1); nsBlockInFlowLineIterator it2(mBlockFrame, aFrame2, &isValid2); return isValid1 && isValid2 && it1.GetLine() == it2.GetLine(); } }; /* Local functions */ static void PaintBackgroundLayer(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aDirtyRect, const nsRect& aBorderArea, const nsRect& aBGClipRect, const nsStyleBackground& aBackground, const nsStyleBackground::Layer& aLayer, const nsStyleBorder& aBorder, PRBool aUsePrintSettings); static void DrawBorderImage(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aBorderArea, const nsStyleBorder& aBorderStyle, const nsRect& aDirtyRect); static void DrawBorderImageComponent(nsIRenderingContext& aRenderingContext, nsIImage* aImage, const nsRect& aDirtyRect, const nsRect& aFill, const nsIntRect& aSrc, PRUint8 aHFill, PRUint8 aVFill, const nsSize& aUnitSize); static nscolor MakeBevelColor(PRIntn whichSide, PRUint8 style, nscolor aBackgroundColor, nscolor aBorderColor); static gfxRect GetTextDecorationRectInternal(const gfxPoint& aPt, const gfxSize& aLineSize, const gfxFloat aAscent, const gfxFloat aOffset, const PRUint8 aDecoration, const PRUint8 aStyle); /* Returns FALSE iff all returned aTwipsRadii == 0, TRUE otherwise */ static PRBool GetBorderRadiusTwips(const nsStyleCorners& aBorderRadius, const nscoord& aFrameWidth, nscoord aTwipsRadii[8]); static InlineBackgroundData* gInlineBGData = nsnull; // Initialize any static variables used by nsCSSRendering. nsresult nsCSSRendering::Init() { NS_ASSERTION(!gInlineBGData, "Init called twice"); gInlineBGData = new InlineBackgroundData(); if (!gInlineBGData) return NS_ERROR_OUT_OF_MEMORY; return NS_OK; } // Clean up any global variables used by nsCSSRendering. void nsCSSRendering::Shutdown() { delete gInlineBGData; gInlineBGData = nsnull; } /** * Make a bevel color */ static nscolor MakeBevelColor(PRIntn whichSide, PRUint8 style, nscolor aBackgroundColor, nscolor aBorderColor) { nscolor colors[2]; nscolor theColor; // Given a background color and a border color // calculate the color used for the shading NS_GetSpecial3DColors(colors, aBackgroundColor, aBorderColor); if ((style == NS_STYLE_BORDER_STYLE_OUTSET) || (style == NS_STYLE_BORDER_STYLE_RIDGE)) { // Flip colors for these two border styles switch (whichSide) { case NS_SIDE_BOTTOM: whichSide = NS_SIDE_TOP; break; case NS_SIDE_RIGHT: whichSide = NS_SIDE_LEFT; break; case NS_SIDE_TOP: whichSide = NS_SIDE_BOTTOM; break; case NS_SIDE_LEFT: whichSide = NS_SIDE_RIGHT; break; } } switch (whichSide) { case NS_SIDE_BOTTOM: theColor = colors[1]; break; case NS_SIDE_RIGHT: theColor = colors[1]; break; case NS_SIDE_TOP: theColor = colors[0]; break; case NS_SIDE_LEFT: default: theColor = colors[0]; break; } return theColor; } //---------------------------------------------------------------------- // Thebes Border Rendering Code Start // helper function to convert a nsRect to a gfxRect static gfxRect RectToGfxRect(const nsRect& rect, nscoord twipsPerPixel) { return gfxRect(gfxFloat(rect.x) / twipsPerPixel, gfxFloat(rect.y) / twipsPerPixel, gfxFloat(rect.width) / twipsPerPixel, gfxFloat(rect.height) / twipsPerPixel); } /* * Compute the float-pixel radii that should be used for drawing * this border/outline, given the various input bits. * * If a side is skipped via skipSides, its corners are forced to 0. * All corner radii are then adjusted so they do not require more * space than outerRect, according to the algorithm in css3-background. */ static void ComputePixelRadii(const nscoord *aTwipsRadii, const nsRect& outerRect, PRIntn skipSides, nscoord twipsPerPixel, gfxCornerSizes *oBorderRadii) { nscoord twipsRadii[8]; memcpy(twipsRadii, aTwipsRadii, sizeof twipsRadii); if (skipSides & SIDE_BIT_TOP) { twipsRadii[NS_CORNER_TOP_LEFT_X] = 0; twipsRadii[NS_CORNER_TOP_LEFT_Y] = 0; twipsRadii[NS_CORNER_TOP_RIGHT_X] = 0; twipsRadii[NS_CORNER_TOP_RIGHT_Y] = 0; } if (skipSides & SIDE_BIT_RIGHT) { twipsRadii[NS_CORNER_TOP_RIGHT_X] = 0; twipsRadii[NS_CORNER_TOP_RIGHT_Y] = 0; twipsRadii[NS_CORNER_BOTTOM_RIGHT_X] = 0; twipsRadii[NS_CORNER_BOTTOM_RIGHT_Y] = 0; } if (skipSides & SIDE_BIT_BOTTOM) { twipsRadii[NS_CORNER_BOTTOM_RIGHT_X] = 0; twipsRadii[NS_CORNER_BOTTOM_RIGHT_Y] = 0; twipsRadii[NS_CORNER_BOTTOM_LEFT_X] = 0; twipsRadii[NS_CORNER_BOTTOM_LEFT_Y] = 0; } if (skipSides & SIDE_BIT_LEFT) { twipsRadii[NS_CORNER_BOTTOM_LEFT_X] = 0; twipsRadii[NS_CORNER_BOTTOM_LEFT_Y] = 0; twipsRadii[NS_CORNER_TOP_LEFT_X] = 0; twipsRadii[NS_CORNER_TOP_LEFT_Y] = 0; } gfxFloat radii[8]; NS_FOR_CSS_HALF_CORNERS(corner) radii[corner] = twipsRadii[corner] / twipsPerPixel; // css3-background specifies this algorithm for reducing // corner radii when they are too big. gfxFloat maxWidth = outerRect.width / twipsPerPixel; gfxFloat maxHeight = outerRect.height / twipsPerPixel; gfxFloat f = 1.0f; NS_FOR_CSS_SIDES(side) { PRUint32 hc1 = NS_SIDE_TO_HALF_CORNER(side, PR_FALSE, PR_TRUE); PRUint32 hc2 = NS_SIDE_TO_HALF_CORNER(side, PR_TRUE, PR_TRUE); gfxFloat length = NS_SIDE_IS_VERTICAL(side) ? maxHeight : maxWidth; gfxFloat sum = radii[hc1] + radii[hc2]; // avoid floating point division in the normal case if (length < sum) f = PR_MIN(f, length/sum); } if (f < 1.0) { NS_FOR_CSS_HALF_CORNERS(corner) { radii[corner] *= f; } } (*oBorderRadii)[C_TL] = gfxSize(radii[NS_CORNER_TOP_LEFT_X], radii[NS_CORNER_TOP_LEFT_Y]); (*oBorderRadii)[C_TR] = gfxSize(radii[NS_CORNER_TOP_RIGHT_X], radii[NS_CORNER_TOP_RIGHT_Y]); (*oBorderRadii)[C_BR] = gfxSize(radii[NS_CORNER_BOTTOM_RIGHT_X], radii[NS_CORNER_BOTTOM_RIGHT_Y]); (*oBorderRadii)[C_BL] = gfxSize(radii[NS_CORNER_BOTTOM_LEFT_X], radii[NS_CORNER_BOTTOM_LEFT_Y]); } void nsCSSRendering::PaintBorder(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aDirtyRect, const nsRect& aBorderArea, const nsStyleBorder& aBorderStyle, nsStyleContext* aStyleContext, PRIntn aSkipSides) { nsMargin border; nscoord twipsRadii[8]; nsCompatibility compatMode = aPresContext->CompatibilityMode(); SN("++ PaintBorder"); // Check to see if we have an appearance defined. If so, we let the theme // renderer draw the border. DO not get the data from aForFrame, since the passed in style context // may be different! Always use |aStyleContext|! const nsStyleDisplay* displayData = aStyleContext->GetStyleDisplay(); if (displayData->mAppearance) { nsITheme *theme = aPresContext->GetTheme(); if (theme && theme->ThemeSupportsWidget(aPresContext, aForFrame, displayData->mAppearance)) return; // Let the theme handle it. } if (aBorderStyle.IsBorderImageLoaded()) { DrawBorderImage(aPresContext, aRenderingContext, aForFrame, aBorderArea, aBorderStyle, aDirtyRect); return; } // Get our style context's color struct. const nsStyleColor* ourColor = aStyleContext->GetStyleColor(); // in NavQuirks mode we want to use the parent's context as a starting point // for determining the background color nsStyleContext* bgContext = nsCSSRendering::FindNonTransparentBackground (aStyleContext, compatMode == eCompatibility_NavQuirks ? PR_TRUE : PR_FALSE); const nsStyleBackground* bgColor = bgContext->GetStyleBackground(); border = aBorderStyle.GetComputedBorder(); if ((0 == border.left) && (0 == border.right) && (0 == border.top) && (0 == border.bottom)) { // Empty border area return; } GetBorderRadiusTwips(aBorderStyle.mBorderRadius, aForFrame->GetSize().width, twipsRadii); // Turn off rendering for all of the zero sized sides if (aSkipSides & SIDE_BIT_TOP) border.top = 0; if (aSkipSides & SIDE_BIT_RIGHT) border.right = 0; if (aSkipSides & SIDE_BIT_BOTTOM) border.bottom = 0; if (aSkipSides & SIDE_BIT_LEFT) border.left = 0; // get the inside and outside parts of the border nsRect outerRect(aBorderArea); SF(" outerRect: %d %d %d %d\n", outerRect.x, outerRect.y, outerRect.width, outerRect.height); // we can assume that we're already clipped to aDirtyRect -- I think? (!?) // Get our conversion values nscoord twipsPerPixel = aPresContext->DevPixelsToAppUnits(1); // convert outer and inner rects gfxRect oRect(RectToGfxRect(outerRect, twipsPerPixel)); // convert the border widths gfxFloat borderWidths[4] = { border.top / twipsPerPixel, border.right / twipsPerPixel, border.bottom / twipsPerPixel, border.left / twipsPerPixel }; // convert the radii gfxCornerSizes borderRadii; ComputePixelRadii(twipsRadii, outerRect, aSkipSides, twipsPerPixel, &borderRadii); PRUint8 borderStyles[4]; nscolor borderColors[4]; nsBorderColors *compositeColors[4]; // pull out styles, colors, composite colors NS_FOR_CSS_SIDES (i) { PRBool foreground; borderStyles[i] = aBorderStyle.GetBorderStyle(i); aBorderStyle.GetBorderColor(i, borderColors[i], foreground); aBorderStyle.GetCompositeColors(i, &compositeColors[i]); if (foreground) borderColors[i] = ourColor->mColor; } SF(" borderStyles: %d %d %d %d\n", borderStyles[0], borderStyles[1], borderStyles[2], borderStyles[3]); // start drawing gfxContext *ctx = aRenderingContext.ThebesContext(); ctx->Save(); #if 0 // this will draw a transparent red backround underneath the oRect area ctx->Save(); ctx->Rectangle(oRect); ctx->SetColor(gfxRGBA(1.0, 0.0, 0.0, 0.5)); ctx->Fill(); ctx->Restore(); #endif //SF ("borderRadii: %f %f %f %f\n", borderRadii[0], borderRadii[1], borderRadii[2], borderRadii[3]); nsCSSBorderRenderer br(twipsPerPixel, ctx, oRect, borderStyles, borderWidths, borderRadii, borderColors, compositeColors, aSkipSides, bgColor->mBackgroundColor); br.DrawBorders(); ctx->Restore(); SN(); } static nsRect GetOutlineInnerRect(nsIFrame* aFrame) { nsRect* savedOutlineInnerRect = static_cast (aFrame->GetProperty(nsGkAtoms::outlineInnerRectProperty)); if (savedOutlineInnerRect) return *savedOutlineInnerRect; return aFrame->GetOverflowRect(); } void nsCSSRendering::PaintOutline(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aDirtyRect, const nsRect& aBorderArea, const nsStyleBorder& aBorderStyle, const nsStyleOutline& aOutlineStyle, nsStyleContext* aStyleContext) { nscoord twipsRadii[8]; // Get our style context's color struct. const nsStyleColor* ourColor = aStyleContext->GetStyleColor(); nscoord width; aOutlineStyle.GetOutlineWidth(width); if (width == 0) { // Empty outline return; } nsStyleContext* bgContext = nsCSSRendering::FindNonTransparentBackground (aStyleContext, PR_FALSE); const nsStyleBackground* bgColor = bgContext->GetStyleBackground(); // get the radius for our outline GetBorderRadiusTwips(aOutlineStyle.mOutlineRadius, aBorderArea.width, twipsRadii); // When the outline property is set on :-moz-anonymous-block or // :-moz-anonyomus-positioned-block pseudo-elements, it inherited that // outline from the inline that was broken because it contained a // block. In that case, we don't want a really wide outline if the // block inside the inline is narrow, so union the actual contents of // the anonymous blocks. nsIFrame *frameForArea = aForFrame; do { nsIAtom *pseudoType = frameForArea->GetStyleContext()->GetPseudoType(); if (pseudoType != nsCSSAnonBoxes::mozAnonymousBlock && pseudoType != nsCSSAnonBoxes::mozAnonymousPositionedBlock) break; // If we're done, we really want it and all its later siblings. frameForArea = frameForArea->GetFirstChild(nsnull); NS_ASSERTION(frameForArea, "anonymous block with no children?"); } while (frameForArea); nsRect innerRect; // relative to aBorderArea.TopLeft() if (frameForArea == aForFrame) { innerRect = GetOutlineInnerRect(aForFrame); } else { for (; frameForArea; frameForArea = frameForArea->GetNextSibling()) { // The outline has already been included in aForFrame's overflow // area, but not in those of its descendants, so we have to // include it. Otherwise we'll end up drawing the outline inside // the border. nsRect r(GetOutlineInnerRect(frameForArea) + frameForArea->GetOffsetTo(aForFrame)); innerRect.UnionRect(innerRect, r); } } innerRect += aBorderArea.TopLeft(); nscoord offset = aOutlineStyle.mOutlineOffset; innerRect.Inflate(offset, offset); // If the dirty rect is completely inside the border area (e.g., only the // content is being painted), then we can skip out now // XXX this isn't exactly true for rounded borders, where the inside curves may // encroach into the content area. A safer calculation would be to // shorten insideRect by the radius one each side before performing this test. if (innerRect.Contains(aDirtyRect)) return; nsRect outerRect = innerRect; outerRect.Inflate(width, width); // Get our conversion values nscoord twipsPerPixel = aPresContext->DevPixelsToAppUnits(1); // get the outer rectangles gfxRect oRect(RectToGfxRect(outerRect, twipsPerPixel)); // convert the radii nsMargin outlineMargin(width, width, width, width); gfxCornerSizes outlineRadii; ComputePixelRadii(twipsRadii, outerRect, 0, twipsPerPixel, &outlineRadii); PRUint8 outlineStyle = aOutlineStyle.GetOutlineStyle(); PRUint8 outlineStyles[4] = { outlineStyle, outlineStyle, outlineStyle, outlineStyle }; nscolor outlineColor; // PR_FALSE means use the initial color; PR_TRUE means a color was // set. if (!aOutlineStyle.GetOutlineColor(outlineColor)) outlineColor = ourColor->mColor; nscolor outlineColors[4] = { outlineColor, outlineColor, outlineColor, outlineColor }; // convert the border widths gfxFloat outlineWidths[4] = { width / twipsPerPixel, width / twipsPerPixel, width / twipsPerPixel, width / twipsPerPixel }; // start drawing gfxContext *ctx = aRenderingContext.ThebesContext(); ctx->Save(); nsCSSBorderRenderer br(twipsPerPixel, ctx, oRect, outlineStyles, outlineWidths, outlineRadii, outlineColors, nsnull, 0, bgColor->mBackgroundColor); br.DrawBorders(); ctx->Restore(); SN(); } void nsCSSRendering::PaintFocus(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, const nsRect& aFocusRect, nscolor aColor) { nscoord oneCSSPixel = nsPresContext::CSSPixelsToAppUnits(1); nscoord oneDevPixel = aPresContext->DevPixelsToAppUnits(1); gfxRect focusRect(RectToGfxRect(aFocusRect, oneDevPixel)); gfxCornerSizes focusRadii; { nscoord twipsRadii[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; ComputePixelRadii(twipsRadii, aFocusRect, 0, oneDevPixel, &focusRadii); } gfxFloat focusWidths[4] = { oneCSSPixel / oneDevPixel, oneCSSPixel / oneDevPixel, oneCSSPixel / oneDevPixel, oneCSSPixel / oneDevPixel }; PRUint8 focusStyles[4] = { NS_STYLE_BORDER_STYLE_DOTTED, NS_STYLE_BORDER_STYLE_DOTTED, NS_STYLE_BORDER_STYLE_DOTTED, NS_STYLE_BORDER_STYLE_DOTTED }; nscolor focusColors[4] = { aColor, aColor, aColor, aColor }; gfxContext *ctx = aRenderingContext.ThebesContext(); ctx->Save(); // Because this renders a dotted border, the background color // should not be used. Therefore, we provide a value that will // be blatantly wrong if it ever does get used. (If this becomes // something that CSS can style, this function will then have access // to a style context and can use the same logic that PaintBorder // and PaintOutline do.) nsCSSBorderRenderer br(oneDevPixel, ctx, focusRect, focusStyles, focusWidths, focusRadii, focusColors, nsnull, 0, NS_RGB(255, 0, 0)); br.DrawBorders(); ctx->Restore(); SN(); } // Thebes Border Rendering Code End //---------------------------------------------------------------------- //---------------------------------------------------------------------- /** * Computes the placement of a background image. * * @param aOriginBounds is the box to which the tiling position should be * relative * This should correspond to 'background-origin' for the frame, * except when painting on the canvas, in which case the origin bounds * should be the bounds of the root element's frame. * @param aTopLeft the top-left corner where an image tile should be drawn * @param aAnchorPoint a point which should be pixel-aligned by * nsLayoutUtils::DrawImage. This is the same as aTopLeft, unless CSS * specifies a percentage (including 'right' or 'bottom'), in which case * it's that percentage within of aOriginBounds. So 'right' would set * aAnchorPoint.x to aOriginBounds.XMost(). * * Points are returned relative to aOriginBounds. */ static void ComputeBackgroundAnchorPoint(const nsStyleBackground::Layer& aLayer, const nsSize& aOriginBounds, const nsSize& aImageSize, nsPoint* aTopLeft, nsPoint* aAnchorPoint) { if (!aLayer.mPosition.mXIsPercent) { aTopLeft->x = aAnchorPoint->x = aLayer.mPosition.mXPosition.mCoord; } else { double percent = aLayer.mPosition.mXPosition.mFloat; aAnchorPoint->x = NSToCoordRound(percent*aOriginBounds.width); aTopLeft->x = NSToCoordRound(percent*(aOriginBounds.width - aImageSize.width)); } if (!aLayer.mPosition.mYIsPercent) { aTopLeft->y = aAnchorPoint->y = aLayer.mPosition.mYPosition.mCoord; } else { double percent = aLayer.mPosition.mYPosition.mFloat; aAnchorPoint->y = NSToCoordRound(percent*aOriginBounds.height); aTopLeft->y = NSToCoordRound(percent*(aOriginBounds.height - aImageSize.height)); } } nsStyleContext* nsCSSRendering::FindNonTransparentBackground(nsStyleContext* aContext, PRBool aStartAtParent /*= PR_FALSE*/) { NS_ASSERTION(aContext, "Cannot find NonTransparentBackground in a null context" ); nsStyleContext* context = nsnull; if (aStartAtParent) { context = aContext->GetParent(); } if (!context) { context = aContext; } while (context) { const nsStyleBackground* bg = context->GetStyleBackground(); if (NS_GET_A(bg->mBackgroundColor) > 0) break; const nsStyleDisplay* display = context->GetStyleDisplay(); if (display->mAppearance) break; nsStyleContext* parent = context->GetParent(); if (!parent) break; context = parent; } return context; } /** * |FindBackground| finds the correct style data to use to paint the * background. It is responsible for handling the following two * statements in section 14.2 of CSS2: * * The background of the box generated by the root element covers the * entire canvas. * * For HTML documents, however, we recommend that authors specify the * background for the BODY element rather than the HTML element. User * agents should observe the following precedence rules to fill in the * background: if the value of the 'background' property for the HTML * element is different from 'transparent' then use it, else use the * value of the 'background' property for the BODY element. If the * resulting value is 'transparent', the rendering is undefined. * * Thus, in our implementation, it is responsible for ensuring that: * + we paint the correct background on the |nsCanvasFrame|, * |nsRootBoxFrame|, or |nsPageFrame|, * + we don't paint the background on the root element, and * + we don't paint the background on the BODY element in *some* cases, * and for SGML-based HTML documents only. * * |FindBackground| returns true if a background should be painted, and * the resulting style context to use for the background information * will be filled in to |aBackground|. It fills in a boolean indicating * whether the frame is the canvas frame, because PaintBackground must * propagate that frame's background color to the view manager. */ // Returns true if aFrame is a canvas frame. // We need to treat the viewport as canvas because, even though // it does not actually paint a background, we need to get the right // background style so we correctly detect transparent documents. PRBool nsCSSRendering::IsCanvasFrame(nsIFrame *aFrame) { nsIAtom* frameType = aFrame->GetType(); return frameType == nsGkAtoms::canvasFrame || frameType == nsGkAtoms::rootFrame || frameType == nsGkAtoms::pageFrame || frameType == nsGkAtoms::pageContentFrame || frameType == nsGkAtoms::viewportFrame; } const nsStyleBackground* nsCSSRendering::FindRootFrameBackground(nsIFrame* aForFrame) { const nsStyleBackground* result = aForFrame->GetStyleBackground(); // Check if we need to do propagation from BODY rather than HTML. if (result->IsTransparent()) { nsIContent* content = aForFrame->GetContent(); // The root element content can't be null. We wouldn't know what // frame to create for aForFrame. // Use |GetOwnerDoc| so it works during destruction. nsIDocument* document = content->GetOwnerDoc(); nsCOMPtr htmlDoc = do_QueryInterface(document); if (htmlDoc) { nsIContent* bodyContent = htmlDoc->GetBodyContentExternal(); // We need to null check the body node (bug 118829) since // there are cases, thanks to the fix for bug 5569, where we // will reflow a document with no body. In particular, if a // SCRIPT element in the head blocks the parser and then has a // SCRIPT that does "document.location.href = 'foo'", then // nsParser::Terminate will call |DidBuildModel| methods // through to the content sink, which will call |StartLayout| // and thus |InitialReflow| on the pres shell. See bug 119351 // for the ugly details. if (bodyContent) { nsIFrame *bodyFrame = aForFrame->PresContext()->GetPresShell()-> GetPrimaryFrameFor(bodyContent); if (bodyFrame) result = bodyFrame->GetStyleBackground(); } } } return result; } inline void FindCanvasBackground(nsIFrame* aForFrame, nsIFrame* aRootElementFrame, const nsStyleBackground** aBackground) { if (aRootElementFrame) { *aBackground = nsCSSRendering::FindRootFrameBackground(aRootElementFrame); } else { // This should always give transparent, so we'll fill it in with the // default color if needed. This seems to happen a bit while a page is // being loaded. *aBackground = aForFrame->GetStyleBackground(); } } inline PRBool FindElementBackground(nsIFrame* aForFrame, nsIFrame* aRootElementFrame, const nsStyleBackground** aBackground) { if (aForFrame == aRootElementFrame) { // We must have propagated our background to the viewport or canvas. Abort. return PR_FALSE; } *aBackground = aForFrame->GetStyleBackground(); // Return true unless the frame is for a BODY element whose background // was propagated to the viewport. nsIContent* content = aForFrame->GetContent(); if (!content || content->Tag() != nsGkAtoms::body) return PR_TRUE; // not frame for a "body" element // It could be a non-HTML "body" element but that's OK, we'd fail the // bodyContent check below if (aForFrame->GetStyleContext()->GetPseudoType()) return PR_TRUE; // A pseudo-element frame. // We should only look at the background if we're in an HTML document nsIDocument* document = content->GetOwnerDoc(); nsCOMPtr htmlDoc = do_QueryInterface(document); if (!htmlDoc) return PR_TRUE; nsIContent* bodyContent = htmlDoc->GetBodyContentExternal(); if (bodyContent != content) return PR_TRUE; // this wasn't the background that was propagated // This can be called even when there's no root element yet, during frame // construction, via nsLayoutUtils::FrameHasTransparency and // nsContainerFrame::SyncFrameViewProperties. if (!aRootElementFrame) return PR_TRUE; const nsStyleBackground* htmlBG = aRootElementFrame->GetStyleBackground(); return !htmlBG->IsTransparent(); } PRBool nsCSSRendering::FindBackground(nsPresContext* aPresContext, nsIFrame* aForFrame, const nsStyleBackground** aBackground) { nsIFrame* rootElementFrame = aPresContext->PresShell()->FrameConstructor()->GetRootElementStyleFrame(); if (IsCanvasFrame(aForFrame)) { FindCanvasBackground(aForFrame, rootElementFrame, aBackground); return PR_TRUE; } else { return FindElementBackground(aForFrame, rootElementFrame, aBackground); } } void nsCSSRendering::DidPaint() { gInlineBGData->Reset(); } static PRBool GetBorderRadiusTwips(const nsStyleCorners& aBorderRadius, const nscoord& aFrameWidth, nscoord aTwipsRadii[8]) { PRBool result = PR_FALSE; // Convert percentage values NS_FOR_CSS_HALF_CORNERS(i) { const nsStyleCoord c = aBorderRadius.Get(i); switch (c.GetUnit()) { case eStyleUnit_Percent: aTwipsRadii[i] = (nscoord)(c.GetPercentValue() * aFrameWidth); break; case eStyleUnit_Coord: aTwipsRadii[i] = c.GetCoordValue(); break; default: NS_NOTREACHED("GetBorderRadiusTwips: bad unit"); aTwipsRadii[i] = 0; break; } if (aTwipsRadii[i]) result = PR_TRUE; } return result; } void nsCSSRendering::PaintBoxShadowOuter(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aFrameArea, const nsRect& aDirtyRect) { const nsStyleBorder* styleBorder = aForFrame->GetStyleBorder(); if (!styleBorder->mBoxShadow) return; PRIntn sidesToSkip = aForFrame->GetSkipSides(); // Get any border radius, since box-shadow must also have rounded corners if the frame does nscoord twipsRadii[8]; PRBool hasBorderRadius = GetBorderRadiusTwips(styleBorder->mBorderRadius, aFrameArea.width, twipsRadii); nscoord twipsPerPixel = aPresContext->DevPixelsToAppUnits(1); gfxCornerSizes borderRadii; ComputePixelRadii(twipsRadii, aFrameArea, sidesToSkip, twipsPerPixel, &borderRadii); gfxRect frameGfxRect = RectToGfxRect(aFrameArea, twipsPerPixel); frameGfxRect.Round(); gfxRect dirtyGfxRect = RectToGfxRect(aDirtyRect, twipsPerPixel); for (PRUint32 i = styleBorder->mBoxShadow->Length(); i > 0; --i) { nsCSSShadowItem* shadowItem = styleBorder->mBoxShadow->ShadowAt(i - 1); if (shadowItem->mInset) continue; gfxRect shadowRect(aFrameArea.x, aFrameArea.y, aFrameArea.width, aFrameArea.height); shadowRect.MoveBy(gfxPoint(shadowItem->mXOffset, shadowItem->mYOffset)); shadowRect.Outset(shadowItem->mSpread); gfxRect shadowRectPlusBlur = shadowRect; shadowRect.ScaleInverse(twipsPerPixel); shadowRect.Round(); // shadowRect won't include the blur, so make an extra rect here that includes the blur // for use in the even-odd rule below. nscoord blurRadius = shadowItem->mRadius; shadowRectPlusBlur.Outset(blurRadius); shadowRectPlusBlur.ScaleInverse(twipsPerPixel); shadowRectPlusBlur.RoundOut(); gfxContext* renderContext = aRenderingContext.ThebesContext(); nsRefPtr shadowContext; nsContextBoxBlur blurringArea; // shadowRect is already in device pixels, pass 1 as the appunits/pixel value blurRadius /= twipsPerPixel; shadowContext = blurringArea.Init(shadowRect, blurRadius, 1, renderContext, dirtyGfxRect); if (!shadowContext) continue; // Set the shadow color; if not specified, use the foreground color nscolor shadowColor; if (shadowItem->mHasColor) shadowColor = shadowItem->mColor; else shadowColor = aForFrame->GetStyleColor()->mColor; renderContext->Save(); renderContext->SetColor(gfxRGBA(shadowColor)); // Clip out the area of the actual frame so the shadow is not shown within // the frame renderContext->NewPath(); renderContext->Rectangle(shadowRectPlusBlur); if (hasBorderRadius) renderContext->RoundedRectangle(frameGfxRect, borderRadii); else renderContext->Rectangle(frameGfxRect); renderContext->SetFillRule(gfxContext::FILL_RULE_EVEN_ODD); renderContext->Clip(); // Draw the shape of the frame so it can be blurred. Recall how nsContextBoxBlur // doesn't make any temporary surfaces if blur is 0 and it just returns the original // surface? If we have no blur, we're painting this fill on the actual content surface // (renderContext == shadowContext) which is why we set up the color and clip // before doing this. shadowContext->NewPath(); if (hasBorderRadius) shadowContext->RoundedRectangle(shadowRect, borderRadii); else shadowContext->Rectangle(shadowRect); shadowContext->Fill(); blurringArea.DoPaint(); renderContext->Restore(); } } void nsCSSRendering::PaintBoxShadowInner(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aFrameArea, const nsRect& aDirtyRect) { const nsStyleBorder* styleBorder = aForFrame->GetStyleBorder(); if (!styleBorder->mBoxShadow) return; // Get any border radius, since box-shadow must also have rounded corners if the frame does nscoord twipsRadii[8]; PRBool hasBorderRadius = GetBorderRadiusTwips(styleBorder->mBorderRadius, aFrameArea.width, twipsRadii); nscoord twipsPerPixel = aPresContext->DevPixelsToAppUnits(1); nsRect paddingRect = aFrameArea; nsMargin border = aForFrame->GetUsedBorder(); aForFrame->ApplySkipSides(border); paddingRect.Deflate(border); gfxCornerSizes innerRadii; if (hasBorderRadius) { gfxCornerSizes borderRadii; PRIntn sidesToSkip = aForFrame->GetSkipSides(); ComputePixelRadii(twipsRadii, aFrameArea, sidesToSkip, twipsPerPixel, &borderRadii); gfxFloat borderSizes[4] = { border.top / twipsPerPixel, border.right / twipsPerPixel, border.bottom / twipsPerPixel, border.left / twipsPerPixel }; nsCSSBorderRenderer::ComputeInnerRadii(borderRadii, borderSizes, &innerRadii); } gfxRect frameGfxRect = RectToGfxRect(paddingRect, twipsPerPixel); frameGfxRect.Round(); gfxRect dirtyGfxRect = RectToGfxRect(aDirtyRect, twipsPerPixel); for (PRUint32 i = styleBorder->mBoxShadow->Length(); i > 0; --i) { nsCSSShadowItem* shadowItem = styleBorder->mBoxShadow->ShadowAt(i - 1); if (!shadowItem->mInset) continue; /* * shadowRect: the frame's padding rect * shadowPaintRect: the area to paint on the temp surface, larger than shadowRect * so that blurs still happen properly near the edges * shadowClipRect: the area on the temporary surface within shadowPaintRect * that we will NOT paint in */ nscoord blurRadius = shadowItem->mRadius; gfxRect shadowRect(paddingRect.x, paddingRect.y, paddingRect.width, paddingRect.height); gfxRect shadowPaintRect = shadowRect; shadowPaintRect.Outset(blurRadius); gfxRect shadowClipRect = shadowRect; shadowClipRect.MoveBy(gfxPoint(shadowItem->mXOffset, shadowItem->mYOffset)); shadowClipRect.Inset(shadowItem->mSpread); shadowRect.ScaleInverse(twipsPerPixel); shadowRect.Round(); shadowPaintRect.ScaleInverse(twipsPerPixel); shadowPaintRect.RoundOut(); shadowClipRect.ScaleInverse(twipsPerPixel); shadowClipRect.Round(); gfxContext* renderContext = aRenderingContext.ThebesContext(); nsRefPtr shadowContext; nsContextBoxBlur blurringArea; // shadowPaintRect is already in device pixels, pass 1 as the appunits/pixel value blurRadius /= twipsPerPixel; shadowContext = blurringArea.Init(shadowPaintRect, blurRadius, 1, renderContext, dirtyGfxRect); if (!shadowContext) continue; // Set the shadow color; if not specified, use the foreground color nscolor shadowColor; if (shadowItem->mHasColor) shadowColor = shadowItem->mColor; else shadowColor = aForFrame->GetStyleColor()->mColor; renderContext->Save(); renderContext->SetColor(gfxRGBA(shadowColor)); // Clip the context to the area of the frame's padding rect, so no part of the // shadow is painted outside renderContext->NewPath(); if (hasBorderRadius) renderContext->RoundedRectangle(shadowRect, innerRadii, PR_FALSE); else renderContext->Rectangle(shadowRect); renderContext->Clip(); // Fill the temporary surface minus the area within the frame that we should // not paint in, and blur and apply it shadowContext->NewPath(); shadowContext->Rectangle(shadowPaintRect); if (hasBorderRadius) shadowContext->RoundedRectangle(shadowClipRect, innerRadii, PR_FALSE); else shadowContext->Rectangle(shadowClipRect); shadowContext->SetFillRule(gfxContext::FILL_RULE_EVEN_ODD); shadowContext->Fill(); blurringArea.DoPaint(); renderContext->Restore(); } } void nsCSSRendering::PaintBackground(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aDirtyRect, const nsRect& aBorderArea, PRBool aUsePrintSettings, nsRect* aBGClipRect) { NS_PRECONDITION(aForFrame, "Frame is expected to be provided to PaintBackground"); const nsStyleBackground *color; if (!FindBackground(aPresContext, aForFrame, &color)) { // we don't want to bail out of moz-appearance is set on a root // node. If it has a parent content node, bail because it's not // a root, other wise keep going in order to let the theme stuff // draw the background. The canvas really should be drawing the // bg, but there's no way to hook that up via css. if (!aForFrame->GetStyleDisplay()->mAppearance) { return; } nsIContent* content = aForFrame->GetContent(); if (!content || content->GetParent()) { return; } color = aForFrame->GetStyleBackground(); } PaintBackgroundWithSC(aPresContext, aRenderingContext, aForFrame, aDirtyRect, aBorderArea, *color, *aForFrame->GetStyleBorder(), aUsePrintSettings, aBGClipRect); } static PRBool IsSolidBorderEdge(const nsStyleBorder& aBorder, PRUint32 aSide) { if (aBorder.GetActualBorder().side(aSide) == 0) return PR_TRUE; if (aBorder.GetBorderStyle(aSide) != NS_STYLE_BORDER_STYLE_SOLID) return PR_FALSE; // If we're using a border image, assume it's not fully opaque, // because we may not even have the image loaded at this point, and // even if we did, checking whether the relevant tile is fully // opaque would be too much work. if (aBorder.GetBorderImage()) return PR_FALSE; nscolor color; PRBool isForeground; aBorder.GetBorderColor(aSide, color, isForeground); // We don't know the foreground color here, so if it's being used // we must assume it might be transparent. if (isForeground) return PR_FALSE; return NS_GET_A(color) == 255; } /** * Returns true if all border edges are either missing or opaque. */ static PRBool IsSolidBorder(const nsStyleBorder& aBorder) { if (aBorder.mBorderColors) return PR_FALSE; for (PRUint32 i = 0; i < 4; ++i) { if (!IsSolidBorderEdge(aBorder, i)) return PR_FALSE; } return PR_TRUE; } static PRBool UseImageRequestForBackground(imgIRequest *aRequest) { if (!aRequest) return PR_FALSE; PRUint32 status = imgIRequest::STATUS_ERROR; aRequest->GetImageStatus(&status); return (status & imgIRequest::STATUS_FRAME_COMPLETE) && (status & imgIRequest::STATUS_SIZE_AVAILABLE); } static inline void SetupDirtyRects(const nsRect& aBGClipArea, const nsRect& aCallerDirtyRect, nscoord aAppUnitsPerPixel, /* OUT: */ nsRect* aDirtyRect, gfxRect* aDirtyRectGfx) { aDirtyRect->IntersectRect(aBGClipArea, aCallerDirtyRect); // Compute the Thebes equivalent of the dirtyRect. *aDirtyRectGfx = RectToGfxRect(*aDirtyRect, aAppUnitsPerPixel); NS_WARN_IF_FALSE(aDirtyRect->IsEmpty() || !aDirtyRectGfx->IsEmpty(), "converted dirty rect should not be empty"); NS_ABORT_IF_FALSE(!aDirtyRect->IsEmpty() || aDirtyRectGfx->IsEmpty(), "second should be empty if first is"); } static void SetupBackgroundClip(gfxContext *aCtx, PRUint8 aBackgroundClip, nsIFrame* aForFrame, const nsRect& aBorderArea, const nsRect& aCallerDirtyRect, PRBool aHaveRoundedCorners, const gfxCornerSizes& aBGRadii, nscoord aAppUnitsPerPixel, gfxContextAutoSaveRestore* aAutoSR, /* OUT: */ nsRect* aBGClipArea, nsRect* aDirtyRect, gfxRect* aDirtyRectGfx) { *aBGClipArea = aBorderArea; PRBool radiiAreOuter = PR_TRUE; gfxCornerSizes clippedRadii = aBGRadii; if (aBackgroundClip != NS_STYLE_BG_CLIP_BORDER) { NS_ASSERTION(aBackgroundClip == NS_STYLE_BG_CLIP_PADDING, "unexpected background-clip"); nsMargin border = aForFrame->GetUsedBorder(); aForFrame->ApplySkipSides(border); aBGClipArea->Deflate(border); if (aHaveRoundedCorners) { gfxFloat borderSizes[4] = { border.top / aAppUnitsPerPixel, border.right / aAppUnitsPerPixel, border.bottom / aAppUnitsPerPixel, border.left / aAppUnitsPerPixel }; nsCSSBorderRenderer::ComputeInnerRadii(aBGRadii, borderSizes, &clippedRadii); radiiAreOuter = PR_FALSE; } } SetupDirtyRects(*aBGClipArea, aCallerDirtyRect, aAppUnitsPerPixel, aDirtyRect, aDirtyRectGfx); if (aDirtyRectGfx->IsEmpty()) { // Our caller won't draw anything under this condition, so no need // to set more up. return; } // If we have rounded corners, clip all subsequent drawing to the // rounded rectangle defined by bgArea and bgRadii (we don't know // whether the rounded corners intrude on the dirtyRect or not). // Do not do this if we have a caller-provided clip rect -- // as above with bgArea, arguably a bug, but table painting seems // to depend on it. if (aHaveRoundedCorners) { gfxRect bgAreaGfx(RectToGfxRect(*aBGClipArea, aAppUnitsPerPixel)); bgAreaGfx.Round(); bgAreaGfx.Condition(); if (bgAreaGfx.IsEmpty()) { // I think it's become possible to hit this since // http://hg.mozilla.org/mozilla-central/rev/50e934e4979b landed. NS_WARNING("converted background area should not be empty"); // Make our caller not do anything. aDirtyRectGfx->size.SizeTo(0.0, 0.0); return; } aAutoSR->Reset(aCtx); aCtx->NewPath(); aCtx->RoundedRectangle(bgAreaGfx, clippedRadii, radiiAreOuter); aCtx->Clip(); } } void nsCSSRendering::PaintBackgroundWithSC(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aDirtyRect, const nsRect& aBorderArea, const nsStyleBackground& aColor, const nsStyleBorder& aBorder, PRBool aUsePrintSettings, nsRect* aBGClipRect) { NS_PRECONDITION(aForFrame, "Frame is expected to be provided to PaintBackground"); // Check to see if we have an appearance defined. If so, we let the theme // renderer draw the background and bail out. // XXXzw this ignores aBGClipRect. const nsStyleDisplay* displayData = aForFrame->GetStyleDisplay(); if (displayData->mAppearance) { nsITheme *theme = aPresContext->GetTheme(); if (theme && theme->ThemeSupportsWidget(aPresContext, aForFrame, displayData->mAppearance)) { nsRect dirty; dirty.IntersectRect(aDirtyRect, aBorderArea); theme->DrawWidgetBackground(&aRenderingContext, aForFrame, displayData->mAppearance, aBorderArea, dirty); return; } } // Determine whether we are drawing background images and/or // background colors. PRBool drawBackgroundImage = PR_TRUE; PRBool drawBackgroundColor = PR_TRUE; if (aUsePrintSettings) { drawBackgroundImage = aPresContext->GetBackgroundImageDraw(); drawBackgroundColor = aPresContext->GetBackgroundColorDraw(); } nsStyleBackground::Image bottomImage(aColor.BottomLayer().mImage); PRBool useFallbackColor = PR_FALSE; if (bottomImage.mSpecified) { if (!drawBackgroundImage || !UseImageRequestForBackground(bottomImage.mRequest)) { bottomImage.mRequest = nsnull; } useFallbackColor = bottomImage.mRequest == nsnull; } else { NS_ASSERTION(bottomImage.mRequest == nsnull, "malformed image struct"); } // If GetBackgroundColorDraw() is false, we are still expected to // draw color in the background of any frame that's not completely // transparent, but we are expected to use white instead of whatever // color was specified. nscolor bgColor; if (drawBackgroundColor) { bgColor = useFallbackColor ? aColor.mFallbackBackgroundColor : aColor.mBackgroundColor; if (NS_GET_A(bgColor) == 0) drawBackgroundColor = PR_FALSE; } else { bgColor = NS_RGB(255, 255, 255); if (drawBackgroundImage || !aColor.IsTransparent()) drawBackgroundColor = PR_TRUE; } // At this point, drawBackgroundImage and drawBackgroundColor are // true if and only if we are actually supposed to paint an image or // color into aDirtyRect, respectively. if (!drawBackgroundImage && !drawBackgroundColor) return; // Compute the outermost boundary of the area that might be painted. gfxContext *ctx = aRenderingContext.ThebesContext(); nscoord appUnitsPerPixel = aPresContext->AppUnitsPerDevPixel(); // Same coordinate space as aBorderArea & aBGClipRect gfxCornerSizes bgRadii; PRBool haveRoundedCorners; { nscoord radii[8]; haveRoundedCorners = GetBorderRadiusTwips(aBorder.mBorderRadius, aForFrame->GetSize().width, radii); if (haveRoundedCorners) ComputePixelRadii(radii, aBorderArea, aForFrame->GetSkipSides(), appUnitsPerPixel, &bgRadii); } // The 'bgClipArea' (used only by the image tiling logic, far below) // is the caller-provided aBGClipRect if any, or else the area // determined by the value of 'background-clip' in // SetupCurrentBackgroundClip. (Arguably it should be the // intersection, but that breaks the table painter -- in particular, // taking the intersection breaks reftests/bugs/403429-1[ab].) nsRect bgClipArea, dirtyRect; gfxRect dirtyRectGfx; PRUint8 currentBackgroundClip; PRBool isSolidBorder; gfxContextAutoSaveRestore autoSR; if (aBGClipRect) { bgClipArea = *aBGClipRect; SetupDirtyRects(bgClipArea, aDirtyRect, appUnitsPerPixel, &dirtyRect, &dirtyRectGfx); } else { // The background is rendered over the 'background-clip' area, // which is normally equal to the border area but may be reduced // to the padding area by CSS. Also, if the border is solid, we // don't need to draw outside the padding area. In either case, // if the borders are rounded, make sure we use the same inner // radii as the border code will. // The background-color is drawn based on the bottom // background-clip. currentBackgroundClip = aColor.BottomLayer().mClip; isSolidBorder = IsSolidBorder(aBorder); if (isSolidBorder) currentBackgroundClip = NS_STYLE_BG_CLIP_PADDING; SetupBackgroundClip(ctx, currentBackgroundClip, aForFrame, aBorderArea, aDirtyRect, haveRoundedCorners, bgRadii, appUnitsPerPixel, &autoSR, &bgClipArea, &dirtyRect, &dirtyRectGfx); } // If we might be using a background color, go ahead and set it now. if (drawBackgroundColor) ctx->SetColor(gfxRGBA(bgColor)); // If there is no background image, draw a color. (If there is // neither a background image nor a color, we wouldn't have gotten // this far.) if (!drawBackgroundImage) { if (!dirtyRectGfx.IsEmpty()) { ctx->NewPath(); ctx->Rectangle(dirtyRectGfx, PR_TRUE); ctx->Fill(); } return; } // Ensure we get invalidated for loads of the image. We need to do // this here because this might be the only code that knows about the // association of the style data with the frame. aPresContext->SetupBackgroundImageLoaders(aForFrame, &aColor); if (bottomImage.mRequest && aColor.BottomLayer().mRepeat == NS_STYLE_BG_REPEAT_XY && drawBackgroundColor) { nsCOMPtr image; bottomImage.mRequest->GetImage(getter_AddRefs(image)); // If the image is completely opaque, we may not need to paint // the background color. nsCOMPtr gfxImgFrame; image->GetCurrentFrame(getter_AddRefs(gfxImgFrame)); if (gfxImgFrame) { gfxImgFrame->GetNeedsBackground(&drawBackgroundColor); if (!drawBackgroundColor) { // If the current frame is smaller than its container, we // need to paint the background color even if the frame // itself is opaque. nsIntSize iSize; image->GetWidth(&iSize.width); image->GetHeight(&iSize.height); nsIntRect iframeRect; gfxImgFrame->GetRect(iframeRect); if (iSize.width != iframeRect.width || iSize.height != iframeRect.height) { drawBackgroundColor = PR_TRUE; } } } } // The background color is rendered over the entire dirty area, // even if the image isn't. if (drawBackgroundColor) { if (!dirtyRectGfx.IsEmpty()) { ctx->NewPath(); ctx->Rectangle(dirtyRectGfx, PR_TRUE); ctx->Fill(); } } if (drawBackgroundImage) { NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT(i, &aColor) { const nsStyleBackground::Layer &layer = aColor.mLayers[i]; if (!aBGClipRect) { PRUint8 newBackgroundClip = isSolidBorder ? NS_STYLE_BG_CLIP_PADDING : layer.mClip; if (currentBackgroundClip != newBackgroundClip) { currentBackgroundClip = newBackgroundClip; SetupBackgroundClip(ctx, currentBackgroundClip, aForFrame, aBorderArea, aDirtyRect, haveRoundedCorners, bgRadii, appUnitsPerPixel, &autoSR, &bgClipArea, &dirtyRect, &dirtyRectGfx); } } if (!dirtyRectGfx.IsEmpty()) { PaintBackgroundLayer(aPresContext, aRenderingContext, aForFrame, dirtyRect, aBorderArea, bgClipArea, aColor, layer, aBorder, aUsePrintSettings); } } } } static void PaintBackgroundLayer(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aDirtyRect, // intersected with aBGClipRect const nsRect& aBorderArea, const nsRect& aBGClipRect, const nsStyleBackground& aBackground, const nsStyleBackground::Layer& aLayer, const nsStyleBorder& aBorder, PRBool aUsePrintSettings) { // Lookup the image imgIRequest *req = aLayer.mImage.mRequest; if (!UseImageRequestForBackground(req)) { // There's no image or it's not ready to be painted. return; } nsCOMPtr image; req->GetImage(getter_AddRefs(image)); nsIntSize imageIntSize; image->GetWidth(&imageIntSize.width); image->GetHeight(&imageIntSize.height); nsSize imageSize; imageSize.width = nsPresContext::CSSPixelsToAppUnits(imageIntSize.width); imageSize.height = nsPresContext::CSSPixelsToAppUnits(imageIntSize.height); req = nsnull; // relative to aBorderArea nsRect bgOriginRect(0, 0, 0, 0); nsIAtom* frameType = aForFrame->GetType(); nsIFrame* geometryFrame = aForFrame; if (frameType == nsGkAtoms::inlineFrame || frameType == nsGkAtoms::positionedInlineFrame) { switch (aBackground.mBackgroundInlinePolicy) { case NS_STYLE_BG_INLINE_POLICY_EACH_BOX: bgOriginRect = nsRect(nsPoint(0,0), aBorderArea.Size()); break; case NS_STYLE_BG_INLINE_POLICY_BOUNDING_BOX: bgOriginRect = gInlineBGData->GetBoundingRect(aForFrame); break; default: NS_ERROR("Unknown background-inline-policy value! " "Please, teach me what to do."); case NS_STYLE_BG_INLINE_POLICY_CONTINUOUS: bgOriginRect = gInlineBGData->GetContinuousRect(aForFrame); break; } } else if (frameType == nsGkAtoms::canvasFrame) { geometryFrame = aForFrame->GetFirstChild(nsnull); // geometryFrame might be null if this canvas is a page created // as an overflow container (e.g. the in-flow content has already // finished and this page only displays the continuations of // absolutely positioned content). if (geometryFrame) { bgOriginRect = geometryFrame->GetRect(); } } else { bgOriginRect = nsRect(nsPoint(0,0), aBorderArea.Size()); } // Background images are tiled over the 'background-clip' area // but the origin of the tiling is based on the 'background-origin' area if (aLayer.mOrigin != NS_STYLE_BG_ORIGIN_BORDER && geometryFrame) { nsMargin border = geometryFrame->GetUsedBorder(); geometryFrame->ApplySkipSides(border); bgOriginRect.Deflate(border); if (aLayer.mOrigin != NS_STYLE_BG_ORIGIN_PADDING) { nsMargin padding = geometryFrame->GetUsedPadding(); geometryFrame->ApplySkipSides(padding); bgOriginRect.Deflate(padding); NS_ASSERTION(aLayer.mOrigin == NS_STYLE_BG_ORIGIN_CONTENT, "unknown background-origin value"); } } // Compute the anchor point. // // relative to aBorderArea.TopLeft() (which is where the top-left // of aForFrame's border-box will be rendered) nsPoint imageTopLeft, anchor; if (NS_STYLE_BG_ATTACHMENT_FIXED == aLayer.mAttachment) { // If it's a fixed background attachment, then the image is placed // relative to the viewport, which is the area of the root frame // in a screen context or the page content frame in a print context. // Remember that we've drawn position-varying content in this prescontext aPresContext->SetRenderedPositionVaryingContent(); nsIFrame* topFrame = aPresContext->PresShell()->FrameManager()->GetRootFrame(); NS_ASSERTION(topFrame, "no root frame"); nsIFrame* pageContentFrame = nsnull; if (aPresContext->IsPaginated()) { pageContentFrame = nsLayoutUtils::GetClosestFrameOfType(aForFrame, nsGkAtoms::pageContentFrame); if (pageContentFrame) { topFrame = pageContentFrame; } // else this is an embedded shell and its root frame is what we want } nsRect viewportArea(nsPoint(0, 0), topFrame->GetSize()); if (!pageContentFrame) { // Subtract the size of scrollbars. nsIScrollableFrame* scrollableFrame = aPresContext->PresShell()->GetRootScrollFrameAsScrollable(); if (scrollableFrame) { nsMargin scrollbars = scrollableFrame->GetActualScrollbarSizes(); viewportArea.Deflate(scrollbars); } } // Get the anchor point, relative to the viewport. ComputeBackgroundAnchorPoint(aLayer, viewportArea.Size(), imageSize, &imageTopLeft, &anchor); // Convert the anchor point from viewport coordinates to aForFrame // coordinates. nsPoint offset = viewportArea.TopLeft() - aForFrame->GetOffsetTo(topFrame); imageTopLeft += offset; anchor += offset; } else { ComputeBackgroundAnchorPoint(aLayer, bgOriginRect.Size(), imageSize, &imageTopLeft, &anchor); imageTopLeft += bgOriginRect.TopLeft(); anchor += bgOriginRect.TopLeft(); } nsRect destArea(imageTopLeft + aBorderArea.TopLeft(), imageSize); nsRect fillArea = destArea; PRIntn repeat = aLayer.mRepeat; if (repeat & NS_STYLE_BG_REPEAT_X) { fillArea.x = aBGClipRect.x; fillArea.width = aBGClipRect.width; } if (repeat & NS_STYLE_BG_REPEAT_Y) { fillArea.y = aBGClipRect.y; fillArea.height = aBGClipRect.height; } fillArea.IntersectRect(fillArea, aBGClipRect); nsLayoutUtils::DrawImage(&aRenderingContext, image, destArea, fillArea, anchor + aBorderArea.TopLeft(), aDirtyRect); } static void DrawBorderImage(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aBorderArea, const nsStyleBorder& aBorderStyle, const nsRect& aDirtyRect) { if (aDirtyRect.IsEmpty()) return; // Ensure we get invalidated for loads and animations of the image. // We need to do this here because this might be the only code that // knows about the association of the style data with the frame. // XXX We shouldn't really... since if anybody is passing in a // different style, they'll potentially have the wrong size for the // border too. aPresContext->SetupBorderImageLoaders(aForFrame, &aBorderStyle); imgIRequest *req = aBorderStyle.GetBorderImage(); #ifdef DEBUG { PRUint32 status = imgIRequest::STATUS_ERROR; if (req) req->GetImageStatus(&status); NS_ASSERTION(req && (status & imgIRequest::STATUS_FRAME_COMPLETE), "no image to draw"); } #endif // Get the actual image, and determine where the split points are. // Note that mBorderImageSplit is in image pixels, not necessarily // CSS pixels. nsCOMPtr imgContainer; req->GetImage(getter_AddRefs(imgContainer)); nsIntSize imageSize; imgContainer->GetWidth(&imageSize.width); imgContainer->GetHeight(&imageSize.height); nsCOMPtr imgFrame; imgContainer->GetCurrentFrame(getter_AddRefs(imgFrame)); nsIntRect innerRect; imgFrame->GetRect(innerRect); nsCOMPtr img(do_GetInterface(imgFrame)); // The inner rectangle should precisely enclose the image pixels for // this frame. NS_ASSERTION(innerRect.width == img->GetWidth(), "img inner width off"); NS_ASSERTION(innerRect.height == img->GetHeight(), "img inner height off"); // Convert percentages and clamp values to the image size. nsIntMargin split; NS_FOR_CSS_SIDES(s) { nsStyleCoord coord = aBorderStyle.mBorderImageSplit.Get(s); PRInt32 imgDimension = ((s == NS_SIDE_TOP || s == NS_SIDE_BOTTOM) ? imageSize.height : imageSize.width); double value; switch (coord.GetUnit()) { case eStyleUnit_Percent: value = coord.GetPercentValue() * imgDimension; break; case eStyleUnit_Factor: value = coord.GetFactorValue(); break; default: NS_ASSERTION(coord.GetUnit() == eStyleUnit_Null, "unexpected CSS unit for image split"); value = 0; break; } if (value < 0) value = 0; if (value > imgDimension) value = imgDimension; split.side(s) = NS_lround(value); } nsMargin border(aBorderStyle.GetActualBorder()); // These helper tables recharacterize the 'split' and 'border' margins // in a more convenient form: they are the x/y/width/height coords // required for various bands of the border, and they have been transformed // to be relative to the innerRect (for 'split') or the page (for 'border'). enum { LEFT, MIDDLE, RIGHT, TOP = LEFT, BOTTOM = RIGHT }; const nscoord borderX[3] = { aBorderArea.x + 0, aBorderArea.x + border.left, aBorderArea.x + aBorderArea.width - border.right, }; const nscoord borderY[3] = { aBorderArea.y + 0, aBorderArea.y + border.top, aBorderArea.y + aBorderArea.height - border.bottom, }; const nscoord borderWidth[3] = { border.left, aBorderArea.width - border.left - border.right, border.right, }; const nscoord borderHeight[3] = { border.top, aBorderArea.height - border.top - border.bottom, border.bottom, }; const PRInt32 splitX[3] = { -innerRect.x + 0, -innerRect.x + split.left, -innerRect.x + imageSize.width - split.right, }; const PRInt32 splitY[3] = { -innerRect.y + 0, -innerRect.y + split.top, -innerRect.y + imageSize.height - split.bottom, }; const PRInt32 splitWidth[3] = { split.left, imageSize.width - split.left - split.right, split.right, }; const PRInt32 splitHeight[3] = { split.top, imageSize.height - split.top - split.bottom, split.bottom, }; // In all the 'factor' calculations below, 'border' measurements are // in app units but 'split' measurements are in image/CSS pixels, so // the factor corresponding to no additional scaling is // CSSPixelsToAppUnits(1), not simply 1. for (int i = LEFT; i <= RIGHT; i++) { for (int j = TOP; j <= BOTTOM; j++) { nsRect destArea(borderX[i], borderY[j], borderWidth[i], borderHeight[j]); nsIntRect subArea(splitX[i], splitY[j], splitWidth[i], splitHeight[j]); PRUint8 fillStyleH, fillStyleV; nsSize unitSize; if (i == MIDDLE && j == MIDDLE) { // css-background: // The middle image's width is scaled by the same factor as the // top image unless that factor is zero or infinity, in which // case the scaling factor of the bottom is substituted, and // failing that, the width is not scaled. The height of the // middle image is scaled by the same factor as the left image // unless that factor is zero or infinity, in which case the // scaling factor of the right image is substituted, and failing // that, the height is not scaled. gfxFloat hFactor, vFactor; if (0 < border.left && 0 < split.left) vFactor = gfxFloat(border.left)/split.left; else if (0 < border.right && 0 < split.right) vFactor = gfxFloat(border.right)/split.right; else vFactor = nsPresContext::CSSPixelsToAppUnits(1); if (0 < border.top && 0 < split.top) hFactor = gfxFloat(border.top)/split.top; else if (0 < border.bottom && 0 < split.bottom) hFactor = gfxFloat(border.bottom)/split.bottom; else hFactor = nsPresContext::CSSPixelsToAppUnits(1); unitSize.width = splitWidth[i]*hFactor; unitSize.height = splitHeight[j]*vFactor; fillStyleH = aBorderStyle.mBorderImageHFill; fillStyleV = aBorderStyle.mBorderImageVFill; } else if (i == MIDDLE) { // top, bottom // Sides are always stretched to the thickness of their border, // and stretched proportionately on the other axis. gfxFloat factor; if (0 < borderHeight[j] && 0 < splitHeight[j]) factor = gfxFloat(borderHeight[j])/splitHeight[j]; else factor = nsPresContext::CSSPixelsToAppUnits(1); unitSize.width = splitWidth[i]*factor; unitSize.height = borderHeight[j]; fillStyleH = aBorderStyle.mBorderImageHFill; fillStyleV = NS_STYLE_BORDER_IMAGE_STRETCH; } else if (j == MIDDLE) { // left, right gfxFloat factor; if (0 < borderWidth[i] && 0 < splitWidth[i]) factor = gfxFloat(borderWidth[i])/splitWidth[i]; else factor = nsPresContext::CSSPixelsToAppUnits(1); unitSize.width = borderWidth[i]; unitSize.height = splitHeight[j]*factor; fillStyleH = NS_STYLE_BORDER_IMAGE_STRETCH; fillStyleV = aBorderStyle.mBorderImageVFill; } else { // Corners are always stretched to fit the corner. unitSize.width = borderWidth[i]; unitSize.height = borderHeight[j]; fillStyleH = NS_STYLE_BORDER_IMAGE_STRETCH; fillStyleV = NS_STYLE_BORDER_IMAGE_STRETCH; } DrawBorderImageComponent(aRenderingContext, img, aDirtyRect, destArea, subArea, fillStyleH, fillStyleV, unitSize); } } } static void DrawBorderImageComponent(nsIRenderingContext& aRenderingContext, nsIImage* aImage, const nsRect& aDirtyRect, const nsRect& aFill, const nsIntRect& aSrc, PRUint8 aHFill, PRUint8 aVFill, const nsSize& aUnitSize) { if (aFill.IsEmpty() || aSrc.IsEmpty()) return; nsCOMPtr subImage; if (NS_FAILED(aImage->Extract(aSrc, getter_AddRefs(subImage)))) return; // If we have no tiling in either direction, we can skip the intermediate // scaling step. if ((aHFill == NS_STYLE_BORDER_IMAGE_STRETCH && aVFill == NS_STYLE_BORDER_IMAGE_STRETCH) || (aUnitSize.width == aFill.width && aUnitSize.height == aFill.height)) { nsLayoutUtils::DrawSingleImage(&aRenderingContext, subImage, aFill, aDirtyRect); return; } // Compute the scale and position of the master copy of the image. nsRect tile; switch (aHFill) { case NS_STYLE_BORDER_IMAGE_STRETCH: tile.x = aFill.x; tile.width = aFill.width; break; case NS_STYLE_BORDER_IMAGE_REPEAT: tile.x = aFill.x + aFill.width/2 - aUnitSize.width/2; tile.width = aUnitSize.width; break; case NS_STYLE_BORDER_IMAGE_ROUND: tile.x = aFill.x; tile.width = aFill.width / ceil(gfxFloat(aFill.width)/aUnitSize.width); break; default: NS_NOTREACHED("unrecognized border-image fill style"); } switch (aVFill) { case NS_STYLE_BORDER_IMAGE_STRETCH: tile.y = aFill.y; tile.height = aFill.height; break; case NS_STYLE_BORDER_IMAGE_REPEAT: tile.y = aFill.y + aFill.height/2 - aUnitSize.height/2; tile.height = aUnitSize.height; break; case NS_STYLE_BORDER_IMAGE_ROUND: tile.y = aFill.y; tile.height = aFill.height/ceil(gfxFloat(aFill.height)/aUnitSize.height); break; default: NS_NOTREACHED("unrecognized border-image fill style"); } nsLayoutUtils::DrawImage(&aRenderingContext, subImage, tile, aFill, tile.TopLeft(), aDirtyRect); } // Begin table border-collapsing section // These functions were written to not disrupt the normal ones and yet satisfy some additional requirements // At some point, all functions should be unified to include the additional functionality that these provide static nscoord RoundIntToPixel(nscoord aValue, nscoord aTwipsPerPixel, PRBool aRoundDown = PR_FALSE) { if (aTwipsPerPixel <= 0) // We must be rendering to a device that has a resolution greater than Twips! // In that case, aValue is as accurate as it's going to get. return aValue; nscoord halfPixel = NSToCoordRound(aTwipsPerPixel / 2.0f); nscoord extra = aValue % aTwipsPerPixel; nscoord finalValue = (!aRoundDown && (extra >= halfPixel)) ? aValue + (aTwipsPerPixel - extra) : aValue - extra; return finalValue; } static nscoord RoundFloatToPixel(float aValue, nscoord aTwipsPerPixel, PRBool aRoundDown = PR_FALSE) { return RoundIntToPixel(NSToCoordRound(aValue), aTwipsPerPixel, aRoundDown); } static void SetPoly(const nsRect& aRect, nsPoint* poly) { poly[0].x = aRect.x; poly[0].y = aRect.y; poly[1].x = aRect.x + aRect.width; poly[1].y = aRect.y; poly[2].x = aRect.x + aRect.width; poly[2].y = aRect.y + aRect.height; poly[3].x = aRect.x; poly[3].y = aRect.y + aRect.height; poly[4].x = aRect.x; poly[4].y = aRect.y; } static void DrawSolidBorderSegment(nsIRenderingContext& aContext, nsRect aRect, nscoord aTwipsPerPixel, PRUint8 aStartBevelSide = 0, nscoord aStartBevelOffset = 0, PRUint8 aEndBevelSide = 0, nscoord aEndBevelOffset = 0) { if ((aRect.width == aTwipsPerPixel) || (aRect.height == aTwipsPerPixel) || ((0 == aStartBevelOffset) && (0 == aEndBevelOffset))) { // simple line or rectangle if ((NS_SIDE_TOP == aStartBevelSide) || (NS_SIDE_BOTTOM == aStartBevelSide)) { if (1 == aRect.height) aContext.DrawLine(aRect.x, aRect.y, aRect.x, aRect.y + aRect.height); else aContext.FillRect(aRect); } else { if (1 == aRect.width) aContext.DrawLine(aRect.x, aRect.y, aRect.x + aRect.width, aRect.y); else aContext.FillRect(aRect); } } else { // polygon with beveling nsPoint poly[5]; SetPoly(aRect, poly); switch(aStartBevelSide) { case NS_SIDE_TOP: poly[0].x += aStartBevelOffset; poly[4].x = poly[0].x; break; case NS_SIDE_BOTTOM: poly[3].x += aStartBevelOffset; break; case NS_SIDE_RIGHT: poly[1].y += aStartBevelOffset; break; case NS_SIDE_LEFT: poly[0].y += aStartBevelOffset; poly[4].y = poly[0].y; } switch(aEndBevelSide) { case NS_SIDE_TOP: poly[1].x -= aEndBevelOffset; break; case NS_SIDE_BOTTOM: poly[2].x -= aEndBevelOffset; break; case NS_SIDE_RIGHT: poly[2].y -= aEndBevelOffset; break; case NS_SIDE_LEFT: poly[3].y -= aEndBevelOffset; } aContext.FillPolygon(poly, 5); } } static void GetDashInfo(nscoord aBorderLength, nscoord aDashLength, nscoord aTwipsPerPixel, PRInt32& aNumDashSpaces, nscoord& aStartDashLength, nscoord& aEndDashLength) { aNumDashSpaces = 0; if (aStartDashLength + aDashLength + aEndDashLength >= aBorderLength) { aStartDashLength = aBorderLength; aEndDashLength = 0; } else { aNumDashSpaces = (aBorderLength - aDashLength)/ (2 * aDashLength); // round down nscoord extra = aBorderLength - aStartDashLength - aEndDashLength - (((2 * aNumDashSpaces) - 1) * aDashLength); if (extra > 0) { nscoord half = RoundIntToPixel(extra / 2, aTwipsPerPixel); aStartDashLength += half; aEndDashLength += (extra - half); } } } void nsCSSRendering::DrawTableBorderSegment(nsIRenderingContext& aContext, PRUint8 aBorderStyle, nscolor aBorderColor, const nsStyleBackground* aBGColor, const nsRect& aBorder, PRInt32 aAppUnitsPerCSSPixel, PRUint8 aStartBevelSide, nscoord aStartBevelOffset, PRUint8 aEndBevelSide, nscoord aEndBevelOffset) { aContext.SetColor (aBorderColor); PRBool horizontal = ((NS_SIDE_TOP == aStartBevelSide) || (NS_SIDE_BOTTOM == aStartBevelSide)); nscoord twipsPerPixel = NSIntPixelsToAppUnits(1, aAppUnitsPerCSSPixel); PRUint8 ridgeGroove = NS_STYLE_BORDER_STYLE_RIDGE; if ((twipsPerPixel >= aBorder.width) || (twipsPerPixel >= aBorder.height) || (NS_STYLE_BORDER_STYLE_DASHED == aBorderStyle) || (NS_STYLE_BORDER_STYLE_DOTTED == aBorderStyle)) { // no beveling for 1 pixel border, dash or dot aStartBevelOffset = 0; aEndBevelOffset = 0; } gfxContext *ctx = aContext.ThebesContext(); gfxContext::AntialiasMode oldMode = ctx->CurrentAntialiasMode(); ctx->SetAntialiasMode(gfxContext::MODE_ALIASED); switch (aBorderStyle) { case NS_STYLE_BORDER_STYLE_NONE: case NS_STYLE_BORDER_STYLE_HIDDEN: //NS_ASSERTION(PR_FALSE, "style of none or hidden"); break; case NS_STYLE_BORDER_STYLE_DOTTED: case NS_STYLE_BORDER_STYLE_DASHED: { nscoord dashLength = (NS_STYLE_BORDER_STYLE_DASHED == aBorderStyle) ? DASH_LENGTH : DOT_LENGTH; // make the dash length proportional to the border thickness dashLength *= (horizontal) ? aBorder.height : aBorder.width; // make the min dash length for the ends 1/2 the dash length nscoord minDashLength = (NS_STYLE_BORDER_STYLE_DASHED == aBorderStyle) ? RoundFloatToPixel(((float)dashLength) / 2.0f, twipsPerPixel) : dashLength; minDashLength = PR_MAX(minDashLength, twipsPerPixel); nscoord numDashSpaces = 0; nscoord startDashLength = minDashLength; nscoord endDashLength = minDashLength; if (horizontal) { GetDashInfo(aBorder.width, dashLength, twipsPerPixel, numDashSpaces, startDashLength, endDashLength); nsRect rect(aBorder.x, aBorder.y, startDashLength, aBorder.height); DrawSolidBorderSegment(aContext, rect, twipsPerPixel); for (PRInt32 spaceX = 0; spaceX < numDashSpaces; spaceX++) { rect.x += rect.width + dashLength; rect.width = (spaceX == (numDashSpaces - 1)) ? endDashLength : dashLength; DrawSolidBorderSegment(aContext, rect, twipsPerPixel); } } else { GetDashInfo(aBorder.height, dashLength, twipsPerPixel, numDashSpaces, startDashLength, endDashLength); nsRect rect(aBorder.x, aBorder.y, aBorder.width, startDashLength); DrawSolidBorderSegment(aContext, rect, twipsPerPixel); for (PRInt32 spaceY = 0; spaceY < numDashSpaces; spaceY++) { rect.y += rect.height + dashLength; rect.height = (spaceY == (numDashSpaces - 1)) ? endDashLength : dashLength; DrawSolidBorderSegment(aContext, rect, twipsPerPixel); } } } break; case NS_STYLE_BORDER_STYLE_GROOVE: ridgeGroove = NS_STYLE_BORDER_STYLE_GROOVE; // and fall through to ridge case NS_STYLE_BORDER_STYLE_RIDGE: if ((horizontal && (twipsPerPixel >= aBorder.height)) || (!horizontal && (twipsPerPixel >= aBorder.width))) { // a one pixel border DrawSolidBorderSegment(aContext, aBorder, twipsPerPixel, aStartBevelSide, aStartBevelOffset, aEndBevelSide, aEndBevelOffset); } else { nscoord startBevel = (aStartBevelOffset > 0) ? RoundFloatToPixel(0.5f * (float)aStartBevelOffset, twipsPerPixel, PR_TRUE) : 0; nscoord endBevel = (aEndBevelOffset > 0) ? RoundFloatToPixel(0.5f * (float)aEndBevelOffset, twipsPerPixel, PR_TRUE) : 0; PRUint8 ridgeGrooveSide = (horizontal) ? NS_SIDE_TOP : NS_SIDE_LEFT; aContext.SetColor ( MakeBevelColor(ridgeGrooveSide, ridgeGroove, aBGColor->mBackgroundColor, aBorderColor)); nsRect rect(aBorder); nscoord half; if (horizontal) { // top, bottom half = RoundFloatToPixel(0.5f * (float)aBorder.height, twipsPerPixel); rect.height = half; if (NS_SIDE_TOP == aStartBevelSide) { rect.x += startBevel; rect.width -= startBevel; } if (NS_SIDE_TOP == aEndBevelSide) { rect.width -= endBevel; } DrawSolidBorderSegment(aContext, rect, twipsPerPixel, aStartBevelSide, startBevel, aEndBevelSide, endBevel); } else { // left, right half = RoundFloatToPixel(0.5f * (float)aBorder.width, twipsPerPixel); rect.width = half; if (NS_SIDE_LEFT == aStartBevelSide) { rect.y += startBevel; rect.height -= startBevel; } if (NS_SIDE_LEFT == aEndBevelSide) { rect.height -= endBevel; } DrawSolidBorderSegment(aContext, rect, twipsPerPixel, aStartBevelSide, startBevel, aEndBevelSide, endBevel); } rect = aBorder; ridgeGrooveSide = (NS_SIDE_TOP == ridgeGrooveSide) ? NS_SIDE_BOTTOM : NS_SIDE_RIGHT; aContext.SetColor ( MakeBevelColor(ridgeGrooveSide, ridgeGroove, aBGColor->mBackgroundColor, aBorderColor)); if (horizontal) { rect.y = rect.y + half; rect.height = aBorder.height - half; if (NS_SIDE_BOTTOM == aStartBevelSide) { rect.x += startBevel; rect.width -= startBevel; } if (NS_SIDE_BOTTOM == aEndBevelSide) { rect.width -= endBevel; } DrawSolidBorderSegment(aContext, rect, twipsPerPixel, aStartBevelSide, startBevel, aEndBevelSide, endBevel); } else { rect.x = rect.x + half; rect.width = aBorder.width - half; if (NS_SIDE_RIGHT == aStartBevelSide) { rect.y += aStartBevelOffset - startBevel; rect.height -= startBevel; } if (NS_SIDE_RIGHT == aEndBevelSide) { rect.height -= endBevel; } DrawSolidBorderSegment(aContext, rect, twipsPerPixel, aStartBevelSide, startBevel, aEndBevelSide, endBevel); } } break; case NS_STYLE_BORDER_STYLE_DOUBLE: if ((aBorder.width > 2) && (aBorder.height > 2)) { nscoord startBevel = (aStartBevelOffset > 0) ? RoundFloatToPixel(0.333333f * (float)aStartBevelOffset, twipsPerPixel) : 0; nscoord endBevel = (aEndBevelOffset > 0) ? RoundFloatToPixel(0.333333f * (float)aEndBevelOffset, twipsPerPixel) : 0; if (horizontal) { // top, bottom nscoord thirdHeight = RoundFloatToPixel(0.333333f * (float)aBorder.height, twipsPerPixel); // draw the top line or rect nsRect topRect(aBorder.x, aBorder.y, aBorder.width, thirdHeight); if (NS_SIDE_TOP == aStartBevelSide) { topRect.x += aStartBevelOffset - startBevel; topRect.width -= aStartBevelOffset - startBevel; } if (NS_SIDE_TOP == aEndBevelSide) { topRect.width -= aEndBevelOffset - endBevel; } DrawSolidBorderSegment(aContext, topRect, twipsPerPixel, aStartBevelSide, startBevel, aEndBevelSide, endBevel); // draw the botom line or rect nscoord heightOffset = aBorder.height - thirdHeight; nsRect bottomRect(aBorder.x, aBorder.y + heightOffset, aBorder.width, aBorder.height - heightOffset); if (NS_SIDE_BOTTOM == aStartBevelSide) { bottomRect.x += aStartBevelOffset - startBevel; bottomRect.width -= aStartBevelOffset - startBevel; } if (NS_SIDE_BOTTOM == aEndBevelSide) { bottomRect.width -= aEndBevelOffset - endBevel; } DrawSolidBorderSegment(aContext, bottomRect, twipsPerPixel, aStartBevelSide, startBevel, aEndBevelSide, endBevel); } else { // left, right nscoord thirdWidth = RoundFloatToPixel(0.333333f * (float)aBorder.width, twipsPerPixel); nsRect leftRect(aBorder.x, aBorder.y, thirdWidth, aBorder.height); if (NS_SIDE_LEFT == aStartBevelSide) { leftRect.y += aStartBevelOffset - startBevel; leftRect.height -= aStartBevelOffset - startBevel; } if (NS_SIDE_LEFT == aEndBevelSide) { leftRect.height -= aEndBevelOffset - endBevel; } DrawSolidBorderSegment(aContext, leftRect, twipsPerPixel, aStartBevelSide, startBevel, aEndBevelSide, endBevel); nscoord widthOffset = aBorder.width - thirdWidth; nsRect rightRect(aBorder.x + widthOffset, aBorder.y, aBorder.width - widthOffset, aBorder.height); if (NS_SIDE_RIGHT == aStartBevelSide) { rightRect.y += aStartBevelOffset - startBevel; rightRect.height -= aStartBevelOffset - startBevel; } if (NS_SIDE_RIGHT == aEndBevelSide) { rightRect.height -= aEndBevelOffset - endBevel; } DrawSolidBorderSegment(aContext, rightRect, twipsPerPixel, aStartBevelSide, startBevel, aEndBevelSide, endBevel); } break; } // else fall through to solid case NS_STYLE_BORDER_STYLE_SOLID: DrawSolidBorderSegment(aContext, aBorder, twipsPerPixel, aStartBevelSide, aStartBevelOffset, aEndBevelSide, aEndBevelOffset); break; case NS_STYLE_BORDER_STYLE_OUTSET: case NS_STYLE_BORDER_STYLE_INSET: NS_ASSERTION(PR_FALSE, "inset, outset should have been converted to groove, ridge"); break; case NS_STYLE_BORDER_STYLE_AUTO: NS_ASSERTION(PR_FALSE, "Unexpected 'auto' table border"); break; } ctx->SetAntialiasMode(oldMode); } // End table border-collapsing section void nsCSSRendering::PaintDecorationLine(gfxContext* aGfxContext, const nscolor aColor, const gfxPoint& aPt, const gfxSize& aLineSize, const gfxFloat aAscent, const gfxFloat aOffset, const PRUint8 aDecoration, const PRUint8 aStyle) { gfxRect rect = GetTextDecorationRectInternal(aPt, aLineSize, aAscent, aOffset, aDecoration, aStyle); if (rect.IsEmpty()) return; if (aDecoration != NS_STYLE_TEXT_DECORATION_UNDERLINE && aDecoration != NS_STYLE_TEXT_DECORATION_OVERLINE && aDecoration != NS_STYLE_TEXT_DECORATION_LINE_THROUGH) { NS_ERROR("Invalid decoration value!"); return; } gfxFloat lineHeight = PR_MAX(NS_round(aLineSize.height), 1.0); PRBool contextIsSaved = PR_FALSE; gfxFloat oldLineWidth; nsRefPtr oldPattern; switch (aStyle) { case NS_STYLE_BORDER_STYLE_SOLID: case NS_STYLE_BORDER_STYLE_DOUBLE: oldLineWidth = aGfxContext->CurrentLineWidth(); oldPattern = aGfxContext->GetPattern(); break; case NS_STYLE_BORDER_STYLE_DASHED: { aGfxContext->Save(); contextIsSaved = PR_TRUE; gfxFloat dashWidth = lineHeight * DOT_LENGTH * DASH_LENGTH; gfxFloat dash[2] = { dashWidth, dashWidth }; aGfxContext->SetLineCap(gfxContext::LINE_CAP_BUTT); aGfxContext->SetDash(dash, 2, 0.0); break; } case NS_STYLE_BORDER_STYLE_DOTTED: { aGfxContext->Save(); contextIsSaved = PR_TRUE; gfxFloat dashWidth = lineHeight * DOT_LENGTH; gfxFloat dash[2]; if (lineHeight > 2.0) { dash[0] = 0.0; dash[1] = dashWidth * 2.0; aGfxContext->SetLineCap(gfxContext::LINE_CAP_ROUND); } else { dash[0] = dashWidth; dash[1] = dashWidth; } aGfxContext->SetDash(dash, 2, 0.0); break; } default: NS_ERROR("Invalid style value!"); return; } // The y position should be set to the middle of the line. rect.pos.y += lineHeight / 2; aGfxContext->SetColor(gfxRGBA(aColor)); aGfxContext->SetLineWidth(lineHeight); switch (aStyle) { case NS_STYLE_BORDER_STYLE_SOLID: aGfxContext->NewPath(); aGfxContext->MoveTo(rect.TopLeft()); aGfxContext->LineTo(rect.TopRight()); aGfxContext->Stroke(); break; case NS_STYLE_BORDER_STYLE_DOUBLE: aGfxContext->NewPath(); aGfxContext->MoveTo(rect.TopLeft()); aGfxContext->LineTo(rect.TopRight()); rect.size.height -= lineHeight; aGfxContext->MoveTo(rect.BottomLeft()); aGfxContext->LineTo(rect.BottomRight()); aGfxContext->Stroke(); break; case NS_STYLE_BORDER_STYLE_DOTTED: case NS_STYLE_BORDER_STYLE_DASHED: aGfxContext->NewPath(); aGfxContext->MoveTo(rect.TopLeft()); aGfxContext->LineTo(rect.TopRight()); aGfxContext->Stroke(); break; default: NS_ERROR("Invalid style value!"); break; } if (contextIsSaved) { aGfxContext->Restore(); } else { aGfxContext->SetPattern(oldPattern); aGfxContext->SetLineWidth(oldLineWidth); } } nsRect nsCSSRendering::GetTextDecorationRect(nsPresContext* aPresContext, const gfxSize& aLineSize, const gfxFloat aAscent, const gfxFloat aOffset, const PRUint8 aDecoration, const PRUint8 aStyle) { NS_ASSERTION(aPresContext, "aPresContext is null"); gfxRect rect = GetTextDecorationRectInternal(gfxPoint(0, 0), aLineSize, aAscent, aOffset, aDecoration, aStyle); // The rect values are already rounded to nearest device pixels. nsRect r; r.x = aPresContext->GfxUnitsToAppUnits(rect.X()); r.y = aPresContext->GfxUnitsToAppUnits(rect.Y()); r.width = aPresContext->GfxUnitsToAppUnits(rect.Width()); r.height = aPresContext->GfxUnitsToAppUnits(rect.Height()); return r; } static gfxRect GetTextDecorationRectInternal(const gfxPoint& aPt, const gfxSize& aLineSize, const gfxFloat aAscent, const gfxFloat aOffset, const PRUint8 aDecoration, const PRUint8 aStyle) { gfxRect r; r.pos.x = NS_floor(aPt.x + 0.5); r.size.width = NS_round(aLineSize.width); gfxFloat basesize = NS_round(aLineSize.height); basesize = PR_MAX(basesize, 1.0); r.size.height = basesize; if (aStyle == NS_STYLE_BORDER_STYLE_DOUBLE) { gfxFloat gap = NS_round(basesize / 2.0); gap = PR_MAX(gap, 1.0); r.size.height = basesize * 2.0 + gap; } else { r.size.height = basesize; } gfxFloat baseline = NS_floor(aPt.y + aAscent + 0.5); gfxFloat offset = 0; switch (aDecoration) { case NS_STYLE_TEXT_DECORATION_UNDERLINE: offset = aOffset; break; case NS_STYLE_TEXT_DECORATION_OVERLINE: offset = aOffset - basesize + r.Height(); break; case NS_STYLE_TEXT_DECORATION_LINE_THROUGH: { gfxFloat extra = NS_floor(r.Height() / 2.0 + 0.5); extra = PR_MAX(extra, basesize); offset = aOffset - basesize + extra; break; } default: NS_ERROR("Invalid decoration value!"); } r.pos.y = baseline - NS_floor(offset + 0.5); return r; } // ----- // nsContextBoxBlur // ----- gfxContext* nsContextBoxBlur::Init(const gfxRect& aRect, nscoord aBlurRadius, PRInt32 aAppUnitsPerDevPixel, gfxContext* aDestinationCtx, const gfxRect& aDirtyRect) { mDestinationCtx = aDestinationCtx; PRInt32 blurRadius = static_cast(aBlurRadius / aAppUnitsPerDevPixel); // if not blurring, draw directly onto the destination device if (blurRadius <= 0) { mContext = aDestinationCtx; return mContext; } // Convert from app units to device pixels gfxRect rect = aRect; rect.ScaleInverse(aAppUnitsPerDevPixel); if (rect.IsEmpty()) { mContext = aDestinationCtx; return mContext; } gfxRect dirtyRect = aDirtyRect; dirtyRect.ScaleInverse(aAppUnitsPerDevPixel); mDestinationCtx = aDestinationCtx; // Create the temporary surface for blurring mContext = blur.Init(rect, gfxIntSize(blurRadius, blurRadius), &dirtyRect); return mContext; } void nsContextBoxBlur::DoPaint() { if (mContext == mDestinationCtx) return; blur.Paint(mDestinationCtx); } gfxContext* nsContextBoxBlur::GetContext() { return mContext; }