/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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 the Mozilla SVG project. * * The Initial Developer of the Original Code is IBM Corporation. * Portions created by the Initial Developer are Copyright (C) 2005 * the Initial Developer. All Rights Reserved. * * Contributor(s): * * 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 ***** */ #include "nsIDOMDocument.h" #include "nsIDOMSVGElement.h" #include "nsIDOMSVGSVGElement.h" #include "nsStyleCoord.h" #include "nsPresContext.h" #include "nsSVGSVGElement.h" #include "nsIContent.h" #include "nsIDocument.h" #include "nsIFrame.h" #include "nsGkAtoms.h" #include "nsIURI.h" #include "nsStyleStruct.h" #include "nsIPresShell.h" #include "nsSVGUtils.h" #include "nsISVGGlyphFragmentLeaf.h" #include "nsNetUtil.h" #include "nsIDOMSVGRect.h" #include "nsFrameList.h" #include "nsISVGChildFrame.h" #include "nsContentDLF.h" #include "nsContentUtils.h" #include "nsSVGFilterFrame.h" #include "nsINameSpaceManager.h" #include "nsIDOMSVGPoint.h" #include "nsSVGPoint.h" #include "nsDOMError.h" #include "nsSVGOuterSVGFrame.h" #include "nsSVGPreserveAspectRatio.h" #include "nsSVGMatrix.h" #include "nsSVGClipPathFrame.h" #include "nsSVGMaskFrame.h" #include "nsSVGContainerFrame.h" #include "nsSVGLength2.h" #include "nsGenericElement.h" #include "nsAttrValue.h" #include "nsSVGGeometryFrame.h" #include "nsIScriptError.h" #include "gfxContext.h" #include "gfxMatrix.h" #include "gfxRect.h" #include "gfxImageSurface.h" #include "gfxPlatform.h" #include "nsSVGForeignObjectFrame.h" #include "nsIFontMetrics.h" #include "nsIDOMSVGUnitTypes.h" #include "nsSVGRect.h" #include "nsSVGEffects.h" #include "nsSVGIntegrationUtils.h" #include "nsSVGFilterPaintCallback.h" gfxASurface *nsSVGUtils::mThebesComputationalSurface = nsnull; // c = n / 255 // (c <= 0.0031308 ? c * 12.92 : 1.055 * pow(c, 1 / 2.4) - 0.055) * 255 + 0.5 static const PRUint8 glinearRGBTosRGBMap[256] = { 0, 13, 22, 28, 34, 38, 42, 46, 50, 53, 56, 59, 61, 64, 66, 69, 71, 73, 75, 77, 79, 81, 83, 85, 86, 88, 90, 92, 93, 95, 96, 98, 99, 101, 102, 104, 105, 106, 108, 109, 110, 112, 113, 114, 115, 117, 118, 119, 120, 121, 122, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 148, 149, 150, 151, 152, 153, 154, 155, 155, 156, 157, 158, 159, 159, 160, 161, 162, 163, 163, 164, 165, 166, 167, 167, 168, 169, 170, 170, 171, 172, 173, 173, 174, 175, 175, 176, 177, 178, 178, 179, 180, 180, 181, 182, 182, 183, 184, 185, 185, 186, 187, 187, 188, 189, 189, 190, 190, 191, 192, 192, 193, 194, 194, 195, 196, 196, 197, 197, 198, 199, 199, 200, 200, 201, 202, 202, 203, 203, 204, 205, 205, 206, 206, 207, 208, 208, 209, 209, 210, 210, 211, 212, 212, 213, 213, 214, 214, 215, 215, 216, 216, 217, 218, 218, 219, 219, 220, 220, 221, 221, 222, 222, 223, 223, 224, 224, 225, 226, 226, 227, 227, 228, 228, 229, 229, 230, 230, 231, 231, 232, 232, 233, 233, 234, 234, 235, 235, 236, 236, 237, 237, 238, 238, 238, 239, 239, 240, 240, 241, 241, 242, 242, 243, 243, 244, 244, 245, 245, 246, 246, 246, 247, 247, 248, 248, 249, 249, 250, 250, 251, 251, 251, 252, 252, 253, 253, 254, 254, 255, 255 }; // c = n / 255 // c <= 0.04045 ? c / 12.92 : pow((c + 0.055) / 1.055, 2.4)) * 255 + 0.5 static const PRUint8 gsRGBToLinearRGBMap[256] = { 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 10, 10, 10, 11, 11, 12, 12, 12, 13, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 17, 18, 18, 19, 19, 20, 20, 21, 22, 22, 23, 23, 24, 24, 25, 25, 26, 27, 27, 28, 29, 29, 30, 30, 31, 32, 32, 33, 34, 35, 35, 36, 37, 37, 38, 39, 40, 41, 41, 42, 43, 44, 45, 45, 46, 47, 48, 49, 50, 51, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 76, 77, 78, 79, 80, 81, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 95, 96, 97, 99, 100, 101, 103, 104, 105, 107, 108, 109, 111, 112, 114, 115, 116, 118, 119, 121, 122, 124, 125, 127, 128, 130, 131, 133, 134, 136, 138, 139, 141, 142, 144, 146, 147, 149, 151, 152, 154, 156, 157, 159, 161, 163, 164, 166, 168, 170, 171, 173, 175, 177, 179, 181, 183, 184, 186, 188, 190, 192, 194, 196, 198, 200, 202, 204, 206, 208, 210, 212, 214, 216, 218, 220, 222, 224, 226, 229, 231, 233, 235, 237, 239, 242, 244, 246, 248, 250, 253, 255 }; static PRBool gSVGEnabled; static const char SVG_PREF_STR[] = "svg.enabled"; #ifdef MOZ_SMIL static PRBool gSMILEnabled; static const char SMIL_PREF_STR[] = "svg.smil.enabled"; #endif // MOZ_SMIL static int SVGPrefChanged(const char *aPref, void *aClosure) { PRBool prefVal = nsContentUtils::GetBoolPref(SVG_PREF_STR); if (prefVal == gSVGEnabled) return 0; gSVGEnabled = prefVal; if (gSVGEnabled) nsContentDLF::RegisterSVG(); else nsContentDLF::UnregisterSVG(); return 0; } PRBool NS_SVGEnabled() { static PRBool sInitialized = PR_FALSE; if (!sInitialized) { /* check and register ourselves with the pref */ gSVGEnabled = nsContentUtils::GetBoolPref(SVG_PREF_STR); nsContentUtils::RegisterPrefCallback(SVG_PREF_STR, SVGPrefChanged, nsnull); sInitialized = PR_TRUE; } return gSVGEnabled; } #ifdef MOZ_SMIL static int SMILPrefChanged(const char *aPref, void *aClosure) { PRBool prefVal = nsContentUtils::GetBoolPref(SMIL_PREF_STR); gSMILEnabled = prefVal; return 0; } PRBool NS_SMILEnabled() { static PRBool sInitialized = PR_FALSE; if (!sInitialized) { /* check and register ourselves with the pref */ gSMILEnabled = nsContentUtils::GetBoolPref(SMIL_PREF_STR); nsContentUtils::RegisterPrefCallback(SMIL_PREF_STR, SMILPrefChanged, nsnull); sInitialized = PR_TRUE; } return gSMILEnabled; } #endif // MOZ_SMIL static nsIFrame* GetFrameForContent(nsIContent* aContent) { if (!aContent) return nsnull; nsIDocument *doc = aContent->GetCurrentDoc(); if (!doc) return nsnull; return nsGenericElement::GetPrimaryFrameFor(aContent, doc); } nsIContent* nsSVGUtils::GetParentElement(nsIContent *aContent) { // XXXbz I _think_ this is right. We want to be using the binding manager // that would have attached the binding that gives us our anonymous parent. // That's the binding manager for the document we actually belong to, which // is our owner doc. nsIDocument* ownerDoc = aContent->GetOwnerDoc(); nsBindingManager* bindingManager = ownerDoc ? ownerDoc->BindingManager() : nsnull; if (bindingManager) { // if we have a binding manager -- do we have an anonymous parent? nsIContent *result = bindingManager->GetInsertionParent(aContent); if (result) { return result; } } // otherewise use the explicit one, whether it's null or not... return aContent->GetParent(); } float nsSVGUtils::GetFontSize(nsIContent *aContent) { nsIFrame* frame = GetFrameForContent(aContent); if (!frame) { NS_WARNING("no frame in GetFontSize()"); return 1.0f; } return GetFontSize(frame); } float nsSVGUtils::GetFontSize(nsIFrame *aFrame) { return nsPresContext::AppUnitsToFloatCSSPixels(aFrame->GetStyleFont()->mSize) / aFrame->PresContext()->TextZoom(); } float nsSVGUtils::GetFontXHeight(nsIContent *aContent) { nsIFrame* frame = GetFrameForContent(aContent); if (!frame) { NS_WARNING("no frame in GetFontXHeight()"); return 1.0f; } return GetFontXHeight(frame); } float nsSVGUtils::GetFontXHeight(nsIFrame *aFrame) { nsCOMPtr fontMetrics; nsLayoutUtils::GetFontMetricsForFrame(aFrame, getter_AddRefs(fontMetrics)); if (!fontMetrics) { NS_WARNING("no FontMetrics in GetFontXHeight()"); return 1.0f; } nscoord xHeight; fontMetrics->GetXHeight(xHeight); return nsPresContext::AppUnitsToFloatCSSPixels(xHeight) / aFrame->PresContext()->TextZoom(); } void nsSVGUtils::UnPremultiplyImageDataAlpha(PRUint8 *data, PRInt32 stride, const nsIntRect &rect) { for (PRInt32 y = rect.y; y < rect.YMost(); y++) { for (PRInt32 x = rect.x; x < rect.XMost(); x++) { PRUint8 *pixel = data + stride * y + 4 * x; PRUint8 a = pixel[GFX_ARGB32_OFFSET_A]; if (a == 255) continue; if (a) { pixel[GFX_ARGB32_OFFSET_B] = (255 * pixel[GFX_ARGB32_OFFSET_B]) / a; pixel[GFX_ARGB32_OFFSET_G] = (255 * pixel[GFX_ARGB32_OFFSET_G]) / a; pixel[GFX_ARGB32_OFFSET_R] = (255 * pixel[GFX_ARGB32_OFFSET_R]) / a; } else { pixel[GFX_ARGB32_OFFSET_B] = 0; pixel[GFX_ARGB32_OFFSET_G] = 0; pixel[GFX_ARGB32_OFFSET_R] = 0; } } } } void nsSVGUtils::PremultiplyImageDataAlpha(PRUint8 *data, PRInt32 stride, const nsIntRect &rect) { for (PRInt32 y = rect.y; y < rect.YMost(); y++) { for (PRInt32 x = rect.x; x < rect.XMost(); x++) { PRUint8 *pixel = data + stride * y + 4 * x; PRUint8 a = pixel[GFX_ARGB32_OFFSET_A]; if (a == 255) continue; FAST_DIVIDE_BY_255(pixel[GFX_ARGB32_OFFSET_B], pixel[GFX_ARGB32_OFFSET_B] * a); FAST_DIVIDE_BY_255(pixel[GFX_ARGB32_OFFSET_G], pixel[GFX_ARGB32_OFFSET_G] * a); FAST_DIVIDE_BY_255(pixel[GFX_ARGB32_OFFSET_R], pixel[GFX_ARGB32_OFFSET_R] * a); } } } void nsSVGUtils::ConvertImageDataToLinearRGB(PRUint8 *data, PRInt32 stride, const nsIntRect &rect) { for (PRInt32 y = rect.y; y < rect.YMost(); y++) { for (PRInt32 x = rect.x; x < rect.XMost(); x++) { PRUint8 *pixel = data + stride * y + 4 * x; pixel[GFX_ARGB32_OFFSET_B] = gsRGBToLinearRGBMap[pixel[GFX_ARGB32_OFFSET_B]]; pixel[GFX_ARGB32_OFFSET_G] = gsRGBToLinearRGBMap[pixel[GFX_ARGB32_OFFSET_G]]; pixel[GFX_ARGB32_OFFSET_R] = gsRGBToLinearRGBMap[pixel[GFX_ARGB32_OFFSET_R]]; } } } void nsSVGUtils::ConvertImageDataFromLinearRGB(PRUint8 *data, PRInt32 stride, const nsIntRect &rect) { for (PRInt32 y = rect.y; y < rect.YMost(); y++) { for (PRInt32 x = rect.x; x < rect.XMost(); x++) { PRUint8 *pixel = data + stride * y + 4 * x; pixel[GFX_ARGB32_OFFSET_B] = glinearRGBTosRGBMap[pixel[GFX_ARGB32_OFFSET_B]]; pixel[GFX_ARGB32_OFFSET_G] = glinearRGBTosRGBMap[pixel[GFX_ARGB32_OFFSET_G]]; pixel[GFX_ARGB32_OFFSET_R] = glinearRGBTosRGBMap[pixel[GFX_ARGB32_OFFSET_R]]; } } } nsresult nsSVGUtils::ReportToConsole(nsIDocument* doc, const char* aWarning, const PRUnichar **aParams, PRUint32 aParamsLength) { return nsContentUtils::ReportToConsole(nsContentUtils::eSVG_PROPERTIES, aWarning, aParams, aParamsLength, doc ? doc->GetDocumentURI() : nsnull, EmptyString(), 0, 0, nsIScriptError::warningFlag, "SVG"); } float nsSVGUtils::CoordToFloat(nsPresContext *aPresContext, nsSVGElement *aContent, const nsStyleCoord &aCoord) { switch (aCoord.GetUnit()) { case eStyleUnit_Factor: // user units return aCoord.GetFactorValue(); case eStyleUnit_Coord: return nsPresContext::AppUnitsToFloatCSSPixels(aCoord.GetCoordValue()); case eStyleUnit_Percent: { nsSVGSVGElement* ctx = aContent->GetCtx(); return ctx ? aCoord.GetPercentValue() * ctx->GetLength(nsSVGUtils::XY) : 0.0f; } default: return 0.0f; } } nsresult nsSVGUtils::GetNearestViewportElement(nsIContent *aContent, nsIDOMSVGElement * *aNearestViewportElement) { *aNearestViewportElement = nsnull; nsCOMPtr element = aContent; nsCOMPtr ancestor; unsigned short ancestorCount = 0; while (1) { ancestor = GetParentElement(element); nsCOMPtr fitToViewBox = do_QueryInterface(element); if (fitToViewBox && (ancestor || ancestorCount)) { // right interface and not the outermost SVG element nsCOMPtr SVGElement = do_QueryInterface(element); SVGElement.swap(*aNearestViewportElement); return NS_OK; } if (!ancestor) { // reached the top of our parent chain break; } element = ancestor; ancestorCount++; } return NS_OK; } nsresult nsSVGUtils::GetFarthestViewportElement(nsIContent *aContent, nsIDOMSVGElement * *aFarthestViewportElement) { *aFarthestViewportElement = nsnull; nsCOMPtr element = aContent; nsCOMPtr ancestor; nsCOMPtr SVGElement; unsigned short ancestorCount = 0; while (1) { ancestor = GetParentElement(element); nsCOMPtr fitToViewBox = do_QueryInterface(element); if (fitToViewBox) { // right interface SVGElement = do_QueryInterface(element); } if (!ancestor) { // reached the top of our parent chain break; } element = ancestor; ancestorCount++; } if (ancestorCount == 0 || !SVGElement) { // outermost SVG element or no viewport found return NS_OK; } SVGElement.swap(*aFarthestViewportElement); return NS_OK; } nsresult nsSVGUtils::GetBBox(nsFrameList *aFrames, nsIDOMSVGRect **_retval) { *_retval = nsnull; float minx, miny, maxx, maxy; minx = miny = FLT_MAX; maxx = maxy = -1.0 * FLT_MAX; nsCOMPtr unionRect; nsIFrame* kid = aFrames->FirstChild(); while (kid) { nsISVGChildFrame* SVGFrame = do_QueryFrame(kid); if (SVGFrame) { nsCOMPtr box; SVGFrame->GetBBox(getter_AddRefs(box)); if (box) { float bminx, bminy, bmaxx, bmaxy, width, height; box->GetX(&bminx); box->GetY(&bminy); box->GetWidth(&width); box->GetHeight(&height); bmaxx = bminx+width; bmaxy = bminy+height; if (!unionRect) unionRect = box; minx = PR_MIN(minx, bminx); miny = PR_MIN(miny, bminy); maxx = PR_MAX(maxx, bmaxx); maxy = PR_MAX(maxy, bmaxy); } } kid = kid->GetNextSibling(); } if (unionRect) { unionRect->SetX(minx); unionRect->SetY(miny); unionRect->SetWidth(maxx - minx); unionRect->SetHeight(maxy - miny); *_retval = unionRect; NS_ADDREF(*_retval); return NS_OK; } return NS_ERROR_FAILURE; } nsRect nsSVGUtils::FindFilterInvalidation(nsIFrame *aFrame, const nsRect& aRect) { PRInt32 appUnitsPerDevPixel = aFrame->PresContext()->AppUnitsPerDevPixel(); nsIntRect rect = nsRect::ToOutsidePixels(aRect, appUnitsPerDevPixel); while (aFrame) { if (aFrame->GetStateBits() & NS_STATE_IS_OUTER_SVG) break; nsSVGFilterFrame *filter = nsSVGEffects::GetFilterFrame(aFrame); if (filter) { rect = filter->GetInvalidationBBox(aFrame, rect); } aFrame = aFrame->GetParent(); } return nsIntRect::ToAppUnits(rect, appUnitsPerDevPixel); } void nsSVGUtils::InvalidateCoveredRegion(nsIFrame *aFrame) { if (aFrame->GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD) return; nsSVGOuterSVGFrame* outerSVGFrame = nsSVGUtils::GetOuterSVGFrame(aFrame); NS_ASSERTION(outerSVGFrame, "no outer svg frame"); if (outerSVGFrame) outerSVGFrame->InvalidateCoveredRegion(aFrame); } void nsSVGUtils::UpdateGraphic(nsISVGChildFrame *aSVGFrame) { nsIFrame *frame = do_QueryFrame(aSVGFrame); nsSVGEffects::InvalidateRenderingObservers(frame); if (frame->GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD) return; nsSVGOuterSVGFrame *outerSVGFrame = nsSVGUtils::GetOuterSVGFrame(frame); if (!outerSVGFrame) { NS_ERROR("null outerSVGFrame"); return; } if (outerSVGFrame->IsRedrawSuspended()) { frame->AddStateBits(NS_STATE_SVG_DIRTY); } else { frame->RemoveStateBits(NS_STATE_SVG_DIRTY); PRBool changed = outerSVGFrame->UpdateAndInvalidateCoveredRegion(frame); if (changed) { NotifyAncestorsOfFilterRegionChange(frame); } } } void nsSVGUtils::NotifyAncestorsOfFilterRegionChange(nsIFrame *aFrame) { if (aFrame->GetStateBits() & NS_STATE_IS_OUTER_SVG) { // It would be better if we couldn't get here return; } aFrame = aFrame->GetParent(); while (aFrame) { if (aFrame->GetStateBits() & NS_STATE_IS_OUTER_SVG) return; nsSVGFilterProperty *property = nsSVGEffects::GetFilterProperty(aFrame); if (property) { property->Invalidate(); } aFrame = aFrame->GetParent(); } } double nsSVGUtils::ComputeNormalizedHypotenuse(double aWidth, double aHeight) { return sqrt((aWidth*aWidth + aHeight*aHeight)/2); } float nsSVGUtils::ObjectSpace(nsIDOMSVGRect *aRect, const nsSVGLength2 *aLength) { float fraction, axis; switch (aLength->GetCtxType()) { case X: aRect->GetWidth(&axis); break; case Y: aRect->GetHeight(&axis); break; case XY: { float width, height; aRect->GetWidth(&width); aRect->GetHeight(&height); axis = float(ComputeNormalizedHypotenuse(width, height)); } } if (aLength->IsPercentage()) { fraction = aLength->GetAnimValInSpecifiedUnits() / 100; } else fraction = aLength->GetAnimValue(static_cast (nsnull)); return fraction * axis; } float nsSVGUtils::UserSpace(nsSVGElement *aSVGElement, const nsSVGLength2 *aLength) { return aLength->GetAnimValue(aSVGElement); } float nsSVGUtils::UserSpace(nsIFrame *aNonSVGContext, const nsSVGLength2 *aLength) { return aLength->GetAnimValue(aNonSVGContext); } void nsSVGUtils::TransformPoint(nsIDOMSVGMatrix *matrix, float *x, float *y) { nsCOMPtr point; NS_NewSVGPoint(getter_AddRefs(point), *x, *y); if (!point) return; nsCOMPtr xfpoint; point->MatrixTransform(matrix, getter_AddRefs(xfpoint)); if (!xfpoint) return; xfpoint->GetX(x); xfpoint->GetY(y); } float nsSVGUtils::AngleBisect(float a1, float a2) { float delta = fmod(a2 - a1, static_cast(2*M_PI)); if (delta < 0) { delta += 2*M_PI; } /* delta is now the angle from a1 around to a2, in the range [0, 2*M_PI) */ float r = a1 + delta/2; if (delta >= M_PI) { /* the arc from a2 to a1 is smaller, so use the ray on that side */ r += M_PI; } return r; } nsSVGOuterSVGFrame * nsSVGUtils::GetOuterSVGFrame(nsIFrame *aFrame) { while (aFrame) { if (aFrame->GetStateBits() & NS_STATE_IS_OUTER_SVG) { return static_cast(aFrame); } aFrame = aFrame->GetParent(); } return nsnull; } nsIFrame* nsSVGUtils::GetOuterSVGFrameAndCoveredRegion(nsIFrame* aFrame, nsRect* aRect) { nsISVGChildFrame* svg = do_QueryFrame(aFrame); if (!svg) return nsnull; *aRect = svg->GetCoveredRegion(); return GetOuterSVGFrame(aFrame); } already_AddRefed nsSVGUtils::GetViewBoxTransform(float aViewportWidth, float aViewportHeight, float aViewboxX, float aViewboxY, float aViewboxWidth, float aViewboxHeight, const nsSVGPreserveAspectRatio &aPreserveAspectRatio, PRBool aIgnoreAlign) { NS_ASSERTION(aViewboxWidth > 0, "viewBox width must be greater than zero!"); NS_ASSERTION(aViewboxHeight > 0, "viewBox height must be greater than zero!"); PRUint16 align = aPreserveAspectRatio.GetAnimValue().GetAlign(); PRUint16 meetOrSlice = aPreserveAspectRatio.GetAnimValue().GetMeetOrSlice(); // default to the defaults if (align == nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_UNKNOWN) align = nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID; if (meetOrSlice == nsIDOMSVGPreserveAspectRatio::SVG_MEETORSLICE_UNKNOWN) meetOrSlice = nsIDOMSVGPreserveAspectRatio::SVG_MEETORSLICE_MEET; // alignment disabled for this matrix setup if (aIgnoreAlign) align = nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMIN; float a, d, e, f; a = aViewportWidth / aViewboxWidth; d = aViewportHeight / aViewboxHeight; e = 0.0f; f = 0.0f; if (align != nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_NONE && a != d) { if ((meetOrSlice == nsIDOMSVGPreserveAspectRatio::SVG_MEETORSLICE_MEET && a < d) || (meetOrSlice == nsIDOMSVGPreserveAspectRatio::SVG_MEETORSLICE_SLICE && d < a)) { d = a; switch (align) { case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMIN: case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMIN: case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMIN: break; case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMID: case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID: case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID: f = (aViewportHeight - a * aViewboxHeight) / 2.0f; break; case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMAX: case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX: case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX: f = aViewportHeight - a * aViewboxHeight; break; default: NS_NOTREACHED("Unknown value for align"); } } else if ( (meetOrSlice == nsIDOMSVGPreserveAspectRatio::SVG_MEETORSLICE_MEET && d < a) || (meetOrSlice == nsIDOMSVGPreserveAspectRatio::SVG_MEETORSLICE_SLICE && a < d)) { a = d; switch (align) { case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMIN: case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMID: case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMAX: break; case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMIN: case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID: case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX: e = (aViewportWidth - a * aViewboxWidth) / 2.0f; break; case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMIN: case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID: case nsIDOMSVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX: e = aViewportWidth - a * aViewboxWidth; break; default: NS_NOTREACHED("Unknown value for align"); } } else NS_NOTREACHED("Unknown value for meetOrSlice"); } if (aViewboxX) e += -a * aViewboxX; if (aViewboxY) f += -d * aViewboxY; nsIDOMSVGMatrix *retval; NS_NewSVGMatrix(&retval, a, 0.0f, 0.0f, d, e, f); return retval; } // This is ugly and roc will want to kill me... already_AddRefed nsSVGUtils::GetCanvasTM(nsIFrame *aFrame) { if (!aFrame->IsFrameOfType(nsIFrame::eSVG)) return nsSVGIntegrationUtils::GetInitialMatrix(aFrame); nsIAtom* type = aFrame->GetType(); if (!aFrame->IsLeaf() || type == nsGkAtoms::svgUseFrame) { // foreignObject is the one non-leaf svg frame that isn't a SVGContainer // XXXbz no, no, and once again NO. If you're going to call virtual // methods on frames you best make VERY sure you have the right classes. // How about... an actual interface with GetCanvasTM hanging off it, and an // actual QI to that here? Otherwise any time someone happens to touch an // IsLeaf() implementation we'll end up calling virtual methods on an // object via the wrong vtable. See bug 481100. if (type == nsGkAtoms::svgForeignObjectFrame) { nsSVGForeignObjectFrame *foreignFrame = static_cast(aFrame); return foreignFrame->GetCanvasTM(); } nsSVGContainerFrame *containerFrame = static_cast (aFrame); return containerFrame->GetCanvasTM(); } nsSVGGeometryFrame *geometryFrame = static_cast (aFrame); nsCOMPtr matrix; nsIDOMSVGMatrix *retval; geometryFrame->GetCanvasTM(getter_AddRefs(matrix)); retval = matrix.get(); NS_IF_ADDREF(retval); return retval; } void nsSVGUtils::NotifyChildrenOfSVGChange(nsIFrame *aFrame, PRUint32 aFlags) { nsIFrame *aKid = aFrame->GetFirstChild(nsnull); while (aKid) { nsISVGChildFrame* SVGFrame = do_QueryFrame(aKid); if (SVGFrame) { SVGFrame->NotifySVGChanged(aFlags); } else { NS_ASSERTION(aKid->IsFrameOfType(nsIFrame::eSVG), "SVG frame expected"); // recurse into the children of container frames e.g. , // in case they have child frames with transformation matrices nsSVGUtils::NotifyChildrenOfSVGChange(aKid, aFlags); } aKid = aKid->GetNextSibling(); } } // ************************************************************ class SVGPaintCallback : public nsSVGFilterPaintCallback { public: virtual void Paint(nsSVGRenderState *aContext, nsIFrame *aTarget, const nsIntRect* aDirtyRect) { nsISVGChildFrame *svgChildFrame = do_QueryFrame(aTarget); NS_ASSERTION(svgChildFrame, "Expected SVG frame here"); nsIntRect* dirtyRect = nsnull; nsIntRect tmpDirtyRect; // aDirtyRect is in user-space pixels, we need to convert to // outer-SVG-frame-relative device pixels. if (aDirtyRect) { nsCOMPtr ctm = nsSVGUtils::GetCanvasTM(aTarget); NS_ASSERTION(ctm, "graphic source didn't specify a ctm"); gfxMatrix userToDeviceSpace = nsSVGUtils::ConvertSVGMatrixToThebes(ctm); gfxRect dirtyBounds = userToDeviceSpace.TransformBounds( gfxRect(aDirtyRect->x, aDirtyRect->y, aDirtyRect->width, aDirtyRect->height)); dirtyBounds.RoundOut(); if (NS_SUCCEEDED(nsSVGUtils::GfxRectToIntRect(dirtyBounds, &tmpDirtyRect))) { dirtyRect = &tmpDirtyRect; } } svgChildFrame->PaintSVG(aContext, dirtyRect); } }; void nsSVGUtils::PaintFrameWithEffects(nsSVGRenderState *aContext, const nsIntRect *aDirtyRect, nsIFrame *aFrame) { nsISVGChildFrame *svgChildFrame = do_QueryFrame(aFrame); if (!svgChildFrame) return; float opacity = aFrame->GetStyleDisplay()->mOpacity; if (opacity == 0.0f) return; /* Properties are added lazily and may have been removed by a restyle, so make sure all applicable ones are set again. */ nsSVGEffects::EffectProperties effectProperties = nsSVGEffects::GetEffectProperties(aFrame); PRBool isOK = PR_TRUE; nsSVGFilterFrame *filterFrame = effectProperties.GetFilterFrame(&isOK); /* Check if we need to draw anything. HasValidCoveredRect only returns * true for path geometry and glyphs, so basically we're traversing * all containers and we can only skip leaves here. */ if (aDirtyRect && svgChildFrame->HasValidCoveredRect()) { if (filterFrame) { if (!aDirtyRect->Intersects(filterFrame->GetFilterBBox(aFrame, nsnull))) return; } else { nsRect rect = nsIntRect::ToAppUnits(*aDirtyRect, aFrame->PresContext()->AppUnitsPerDevPixel()); if (!rect.Intersects(aFrame->GetRect())) return; } } /* SVG defines the following rendering model: * * 1. Render geometry * 2. Apply filter * 3. Apply clipping, masking, group opacity * * We follow this, but perform a couple of optimizations: * * + Use cairo's clipPath when representable natively (single object * clip region). * * + Merge opacity and masking if both used together. */ if (opacity != 1.0f && CanOptimizeOpacity(aFrame)) opacity = 1.0f; gfxContext *gfx = aContext->GetGfxContext(); PRBool complexEffects = PR_FALSE; nsSVGClipPathFrame *clipPathFrame = effectProperties.GetClipPathFrame(&isOK); nsSVGMaskFrame *maskFrame = effectProperties.GetMaskFrame(&isOK); PRBool isTrivialClip = clipPathFrame ? clipPathFrame->IsTrivial() : PR_TRUE; if (!isOK) { // Some resource is missing. We shouldn't paint anything. return; } nsCOMPtr matrix = (clipPathFrame || maskFrame) ? GetCanvasTM(aFrame) : nsnull; /* Check if we need to do additional operations on this child's * rendering, which necessitates rendering into another surface. */ if (opacity != 1.0f || maskFrame || (clipPathFrame && !isTrivialClip)) { complexEffects = PR_TRUE; gfx->Save(); gfx->PushGroup(gfxASurface::CONTENT_COLOR_ALPHA); } /* If this frame has only a trivial clipPath, set up cairo's clipping now so * we can just do normal painting and get it clipped appropriately. */ if (clipPathFrame && isTrivialClip) { gfx->Save(); clipPathFrame->ClipPaint(aContext, aFrame, matrix); } /* Paint the child */ if (filterFrame) { SVGPaintCallback paintCallback; filterFrame->FilterPaint(aContext, aFrame, &paintCallback, aDirtyRect); } else { svgChildFrame->PaintSVG(aContext, aDirtyRect); } if (clipPathFrame && isTrivialClip) { gfx->Restore(); } /* No more effects, we're done. */ if (!complexEffects) return; gfx->PopGroupToSource(); nsRefPtr maskSurface = maskFrame ? maskFrame->ComputeMaskAlpha(aContext, aFrame, matrix, opacity) : nsnull; nsRefPtr clipMaskSurface; if (clipPathFrame && !isTrivialClip) { gfx->PushGroup(gfxASurface::CONTENT_COLOR_ALPHA); nsresult rv = clipPathFrame->ClipPaint(aContext, aFrame, matrix); clipMaskSurface = gfx->PopGroup(); if (NS_SUCCEEDED(rv) && clipMaskSurface) { // Still more set after clipping, so clip to another surface if (maskSurface || opacity != 1.0f) { gfx->PushGroup(gfxASurface::CONTENT_COLOR_ALPHA); gfx->Mask(clipMaskSurface); gfx->PopGroupToSource(); } else { gfx->Mask(clipMaskSurface); } } } if (maskSurface) { gfx->Mask(maskSurface); } else if (opacity != 1.0f) { gfx->Paint(opacity); } gfx->Restore(); } PRBool nsSVGUtils::HitTestClip(nsIFrame *aFrame, const nsPoint &aPoint) { nsSVGEffects::EffectProperties props = nsSVGEffects::GetEffectProperties(aFrame); if (!props.mClipPath) return PR_TRUE; nsSVGClipPathFrame *clipPathFrame = props.GetClipPathFrame(nsnull); if (!clipPathFrame) { // clipPath is not a valid resource, so nothing gets painted, so // hit-testing must fail. return PR_FALSE; } nsCOMPtr matrix = GetCanvasTM(aFrame); return clipPathFrame->ClipHitTest(aFrame, matrix, aPoint); } nsIFrame * nsSVGUtils::HitTestChildren(nsIFrame *aFrame, const nsPoint &aPoint) { // XXX: The frame's children are linked in a singly-linked list in document // order. If we were to hit test the children in this order we would need to // hit test *every* SVG frame, since even if we get a hit, later SVG frames // may lie on top of the matching frame. We really want to traverse SVG // frames in reverse order so we can stop at the first match. Since we don't // have a doubly-linked list, for the time being we traverse the // singly-linked list backwards by first reversing the nextSibling pointers // in place, and then restoring them when done. // // Note: While the child list pointers are reversed, any method which walks // the list would only encounter a single child! nsIFrame* current = nsnull; nsIFrame* next = aFrame->GetFirstChild(nsnull); nsIFrame* result = nsnull; // reverse sibling pointers while (next) { nsIFrame* temp = next->GetNextSibling(); next->SetNextSibling(current); current = next; next = temp; } // now do the backwards traversal while (current) { nsISVGChildFrame* SVGFrame = do_QueryFrame(current); if (SVGFrame) { result = SVGFrame->GetFrameForPoint(aPoint); if (result) break; } // restore current frame's sibling pointer nsIFrame* temp = current->GetNextSibling(); current->SetNextSibling(next); next = current; current = temp; } // restore remaining pointers while (current) { nsIFrame* temp = current->GetNextSibling(); current->SetNextSibling(next); next = current; current = temp; } if (result && !HitTestClip(aFrame, aPoint)) result = nsnull; return result; } nsRect nsSVGUtils::GetCoveredRegion(const nsFrameList &aFrames) { nsRect rect; for (nsIFrame* kid = aFrames.FirstChild(); kid; kid = kid->GetNextSibling()) { nsISVGChildFrame* child = do_QueryFrame(kid); if (child) { nsRect childRect = child->GetCoveredRegion(); rect.UnionRect(rect, childRect); } } return rect; } nsRect nsSVGUtils::ToAppPixelRect(nsPresContext *aPresContext, double xmin, double ymin, double xmax, double ymax) { return ToAppPixelRect(aPresContext, gfxRect(xmin, ymin, xmax - xmin, ymax - ymin)); } nsRect nsSVGUtils::ToAppPixelRect(nsPresContext *aPresContext, const gfxRect& rect) { return nsRect(aPresContext->DevPixelsToAppUnits(NSToIntFloor(rect.X())), aPresContext->DevPixelsToAppUnits(NSToIntFloor(rect.Y())), aPresContext->DevPixelsToAppUnits(NSToIntCeil(rect.XMost()) - NSToIntFloor(rect.X())), aPresContext->DevPixelsToAppUnits(NSToIntCeil(rect.YMost()) - NSToIntFloor(rect.Y()))); } gfxIntSize nsSVGUtils::ConvertToSurfaceSize(const gfxSize& aSize, PRBool *aResultOverflows) { gfxIntSize surfaceSize = gfxIntSize(PRInt32(aSize.width + 0.5), PRInt32(aSize.height + 0.5)); *aResultOverflows = (aSize.width >= PR_INT32_MAX + 0.5 || aSize.height >= PR_INT32_MAX + 0.5 || aSize.width <= PR_INT32_MIN - 0.5 || aSize.height <= PR_INT32_MIN - 0.5); if (*aResultOverflows || !gfxASurface::CheckSurfaceSize(surfaceSize)) { surfaceSize.width = PR_MIN(NS_SVG_OFFSCREEN_MAX_DIMENSION, surfaceSize.width); surfaceSize.height = PR_MIN(NS_SVG_OFFSCREEN_MAX_DIMENSION, surfaceSize.height); *aResultOverflows = PR_TRUE; } return surfaceSize; } gfxASurface * nsSVGUtils::GetThebesComputationalSurface() { if (!mThebesComputationalSurface) { nsRefPtr surface = new gfxImageSurface(gfxIntSize(1, 1), gfxASurface::ImageFormatARGB32); NS_ASSERTION(surface && !surface->CairoStatus(), "Could not create offscreen surface"); mThebesComputationalSurface = surface; // we want to keep this surface around NS_IF_ADDREF(mThebesComputationalSurface); } return mThebesComputationalSurface; } gfxMatrix nsSVGUtils::ConvertSVGMatrixToThebes(nsIDOMSVGMatrix *aMatrix) { float A, B, C, D, E, F; aMatrix->GetA(&A); aMatrix->GetB(&B); aMatrix->GetC(&C); aMatrix->GetD(&D); aMatrix->GetE(&E); aMatrix->GetF(&F); return gfxMatrix(A, B, C, D, E, F); } PRBool nsSVGUtils::HitTestRect(nsIDOMSVGMatrix *aMatrix, float aRX, float aRY, float aRWidth, float aRHeight, float aX, float aY) { PRBool result = PR_TRUE; if (aMatrix) { gfxContext ctx(GetThebesComputationalSurface()); ctx.SetMatrix(ConvertSVGMatrixToThebes(aMatrix)); ctx.NewPath(); ctx.Rectangle(gfxRect(aRX, aRY, aRWidth, aRHeight)); ctx.IdentityMatrix(); if (!ctx.PointInFill(gfxPoint(aX, aY))) result = PR_FALSE; } return result; } void nsSVGUtils::CompositeSurfaceMatrix(gfxContext *aContext, gfxASurface *aSurface, nsIDOMSVGMatrix *aCTM, float aOpacity) { gfxMatrix matrix = ConvertSVGMatrixToThebes(aCTM); if (matrix.IsSingular()) return; aContext->Save(); aContext->Multiply(matrix); aContext->SetSource(aSurface); aContext->Paint(aOpacity); aContext->Restore(); } void nsSVGUtils::CompositePatternMatrix(gfxContext *aContext, gfxPattern *aPattern, nsIDOMSVGMatrix *aCTM, float aWidth, float aHeight, float aOpacity) { gfxMatrix matrix = ConvertSVGMatrixToThebes(aCTM); if (matrix.IsSingular()) return; aContext->Save(); SetClipRect(aContext, aCTM, 0, 0, aWidth, aHeight); aContext->Multiply(matrix); aContext->SetPattern(aPattern); aContext->Paint(aOpacity); aContext->Restore(); } void nsSVGUtils::SetClipRect(gfxContext *aContext, nsIDOMSVGMatrix *aCTM, float aX, float aY, float aWidth, float aHeight) { gfxMatrix matrix = ConvertSVGMatrixToThebes(aCTM); if (matrix.IsSingular()) return; gfxMatrix oldMatrix = aContext->CurrentMatrix(); aContext->Multiply(matrix); aContext->Clip(gfxRect(aX, aY, aWidth, aHeight)); aContext->SetMatrix(oldMatrix); } void nsSVGUtils::ClipToGfxRect(nsIntRect* aRect, const gfxRect& aGfxRect) { gfxRect r = aGfxRect; r.RoundOut(); gfxRect r2(aRect->x, aRect->y, aRect->width, aRect->height); r = r.Intersect(r2); *aRect = nsIntRect(PRInt32(r.X()), PRInt32(r.Y()), PRInt32(r.Width()), PRInt32(r.Height())); } nsresult nsSVGUtils::GfxRectToIntRect(const gfxRect& aIn, nsIntRect* aOut) { *aOut = nsIntRect(PRInt32(aIn.X()), PRInt32(aIn.Y()), PRInt32(aIn.Width()), PRInt32(aIn.Height())); return gfxRect(aOut->x, aOut->y, aOut->width, aOut->height) == aIn ? NS_OK : NS_ERROR_FAILURE; } already_AddRefed nsSVGUtils::GetBBox(nsIFrame *aFrame) { nsISVGChildFrame *svg = do_QueryFrame(aFrame); if (!svg) { nsIDOMSVGRect *rect = nsnull; gfxRect r = nsSVGIntegrationUtils::GetSVGBBoxForNonSVGFrame(aFrame); NS_NewSVGRect(&rect, r); return rect; } PRBool needToDisablePropagation = svg->GetMatrixPropagation(); if (needToDisablePropagation) { svg->SetMatrixPropagation(PR_FALSE); svg->NotifySVGChanged(nsISVGChildFrame::SUPPRESS_INVALIDATION | nsISVGChildFrame::TRANSFORM_CHANGED); } nsCOMPtr bbox; svg->GetBBox(getter_AddRefs(bbox)); if (needToDisablePropagation) { svg->SetMatrixPropagation(PR_TRUE); svg->NotifySVGChanged(nsISVGChildFrame::SUPPRESS_INVALIDATION | nsISVGChildFrame::TRANSFORM_CHANGED); } return bbox.forget(); } gfxRect nsSVGUtils::GetRelativeRect(PRUint16 aUnits, const nsSVGLength2 *aXYWH, nsIDOMSVGRect *aBBox, nsIFrame *aFrame) { float x, y, width, height; if (aUnits == nsIDOMSVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) { aBBox->GetX(&x); x += ObjectSpace(aBBox, &aXYWH[0]); aBBox->GetY(&y); y += ObjectSpace(aBBox, &aXYWH[1]); width = ObjectSpace(aBBox, &aXYWH[2]); height = ObjectSpace(aBBox, &aXYWH[3]); } else { x = nsSVGUtils::UserSpace(aFrame, &aXYWH[0]); y = nsSVGUtils::UserSpace(aFrame, &aXYWH[1]); width = nsSVGUtils::UserSpace(aFrame, &aXYWH[2]); height = nsSVGUtils::UserSpace(aFrame, &aXYWH[3]); } return gfxRect(x, y, width, height); } PRBool nsSVGUtils::CanOptimizeOpacity(nsIFrame *aFrame) { if (!aFrame->GetStyleSVGReset()->mFilter) { nsIAtom *type = aFrame->GetType(); if (type == nsGkAtoms::svgImageFrame) return PR_TRUE; if (type == nsGkAtoms::svgPathGeometryFrame) { const nsStyleSVG *style = aFrame->GetStyleSVG(); if (style->mFill.mType == eStyleSVGPaintType_None && style->mStroke.mType == eStyleSVGPaintType_None) return PR_TRUE; } } return PR_FALSE; } float nsSVGUtils::MaxExpansion(nsIDOMSVGMatrix *aMatrix) { float a, b, c, d; aMatrix->GetA(&a); aMatrix->GetB(&b); aMatrix->GetC(&c); aMatrix->GetD(&d); // maximum expansion derivation from // http://lists.cairographics.org/archives/cairo/2004-October/001980.html float f = (a * a + b * b + c * c + d * d) / 2; float g = (a * a + b * b - c * c - d * d) / 2; float h = a * c + b * d; return sqrt(f + sqrt(g * g + h * h)); } already_AddRefed nsSVGUtils::AdjustMatrixForUnits(nsIDOMSVGMatrix *aMatrix, nsSVGEnum *aUnits, nsIFrame *aFrame) { nsCOMPtr fini = aMatrix; if (aFrame && aUnits->GetAnimValue() == nsIDOMSVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) { float minx, miny, width, height; PRBool gotRect = PR_FALSE; if (aFrame->IsFrameOfType(nsIFrame::eSVG)) { nsISVGChildFrame *svgFrame = do_QueryFrame(aFrame); nsCOMPtr rect; svgFrame->GetBBox(getter_AddRefs(rect)); if (rect) { gotRect = PR_TRUE; rect->GetX(&minx); rect->GetY(&miny); rect->GetWidth(&width); rect->GetHeight(&height); // Correct for scaling in outersvg CTM nsPresContext *presCtx = aFrame->PresContext(); float scaleInv = presCtx->AppUnitsToGfxUnits(presCtx->AppUnitsPerCSSPixel()); minx /= scaleInv; miny /= scaleInv; width /= scaleInv; height /= scaleInv; } } else { gotRect = PR_TRUE; gfxRect r = nsSVGIntegrationUtils::GetSVGBBoxForNonSVGFrame(aFrame); minx = r.X(); miny = r.Y(); width = r.Width(); height = r.Height(); } if (gotRect) { nsCOMPtr tmp; aMatrix->Translate(minx, miny, getter_AddRefs(tmp)); tmp->ScaleNonUniform(width, height, getter_AddRefs(fini)); } } nsIDOMSVGMatrix* retval = fini.get(); NS_IF_ADDREF(retval); return retval; } nsIFrame* nsSVGUtils::GetFirstNonAAncestorFrame(nsIFrame* aStartFrame) { for (nsIFrame *ancestorFrame = aStartFrame; ancestorFrame; ancestorFrame = ancestorFrame->GetParent()) { if (ancestorFrame->GetType() != nsGkAtoms::svgAFrame) { return ancestorFrame; } } return nsnull; } #ifdef DEBUG void nsSVGUtils::WritePPM(const char *fname, gfxImageSurface *aSurface) { FILE *f = fopen(fname, "wb"); if (!f) return; gfxIntSize size = aSurface->GetSize(); fprintf(f, "P6\n%d %d\n255\n", size.width, size.height); unsigned char *data = aSurface->Data(); PRInt32 stride = aSurface->Stride(); for (int y=0; yThebesContext(); } nsSVGRenderState::nsSVGRenderState(gfxASurface *aSurface) : mRenderMode(NORMAL) { mGfxContext = new gfxContext(aSurface); } nsIRenderingContext* nsSVGRenderState::GetRenderingContext(nsIFrame *aFrame) { if (!mRenderingContext) { nsIDeviceContext* devCtx = aFrame->PresContext()->DeviceContext(); devCtx->CreateRenderingContextInstance(*getter_AddRefs(mRenderingContext)); if (!mRenderingContext) return nsnull; mRenderingContext->Init(devCtx, mGfxContext); } return mRenderingContext; }