/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* ***** 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 * Vladimir Vukicevic * 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 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 ***** */ #ifdef _MSC_VER #define _USE_MATH_DEFINES #endif #include #include "prmem.h" #include "nsIServiceManager.h" #include "nsContentUtils.h" #include "nsIDOMDocument.h" #include "nsIDocument.h" #include "nsIDOMCanvasRenderingContext2D.h" #include "nsICanvasRenderingContextInternal.h" #include "nsPresContext.h" #include "nsIPresShell.h" #include "nsIVariant.h" #ifdef MOZILLA_1_8_BRANCH #include "nsIScriptGlobalObject.h" #include "nsIViewManager.h" #include "nsIScrollableView.h" #endif #include "imgIRequest.h" #include "imgIContainer.h" #include "gfxIImageFrame.h" #include "nsIDOMHTMLCanvasElement.h" #include "nsICanvasElement.h" #include "nsIDOMHTMLImageElement.h" #include "nsIImageLoadingContent.h" #include "nsIInterfaceRequestorUtils.h" #include "nsIImage.h" #include "nsIFrame.h" #include "nsDOMError.h" #include "nsIScriptError.h" #include "nsICSSParser.h" #include "nsPrintfCString.h" #include "nsReadableUtils.h" #include "nsColor.h" #include "nsTransform2D.h" #include "nsIRenderingContext.h" #include "nsIDeviceContext.h" #include "nsIBlender.h" #include "nsGfxCIID.h" #include "nsIDrawingSurface.h" #include "nsIScriptSecurityManager.h" #include "nsIDocShell.h" #include "nsPresContext.h" #include "nsIPresShell.h" #include "nsIDOMWindow.h" #include "nsPIDOMWindow.h" #include "nsIDocShell.h" #include "nsIDocShellTreeItem.h" #include "nsIDocShellTreeNode.h" #include "nsIXPConnect.h" #include "jsapi.h" #include "jsnum.h" #include "nsTArray.h" #include "cairo.h" #include "imgIEncoder.h" #ifdef MOZILLA_1_8_BRANCH #define imgIEncoder imgIEncoder_MOZILLA_1_8_BRANCH #endif #ifdef MOZ_CAIRO_GFX #include "gfxContext.h" #include "gfxASurface.h" #include "gfxPlatform.h" #include "nsDisplayList.h" #include "nsIViewManager.h" #include "nsIScrollableView.h" #include "nsFrameManager.h" #include "nsRegion.h" #endif #ifdef XP_WIN #include "cairo-win32.h" #ifdef MOZILLA_1_8_BRANCH extern "C" { cairo_surface_t * _cairo_win32_surface_create_dib (cairo_format_t format, int width, int height); } #endif #ifndef M_PI #define M_PI 3.14159265358979323846 #define M_PI_2 1.57079632679489661923 #endif #endif #ifdef XP_OS2 #define INCL_WINWINDOWMGR #define INCL_GPIBITMAPS #include #include "nsDrawingSurfaceOS2.h" #include "cairo-os2.h" #endif #ifdef MOZ_WIDGET_GTK2 #include "cairo-xlib.h" #include "cairo-xlib-xrender.h" #include #include #endif #ifdef XP_MACOSX #include #include /* This has to be 0 on machines less than 10.4 (which are always PPC); * otherwise the older CG gets confused if we pass in * kCGBitmapByteOrder32Big since it doesn't understand it. */ #ifdef __BIG_ENDIAN__ #define CG_BITMAP_BYTE_ORDER_FLAG 0 #else /* Little endian. */ /* x86, and will be a 10.4u SDK; ByteOrder32Host will be defined */ #define CG_BITMAP_BYTE_ORDER_FLAG kCGBitmapByteOrder32Host #endif #ifndef MOZ_CAIRO_GFX #include "nsDrawingSurfaceMac.h" #endif #endif static NS_DEFINE_IID(kBlenderCID, NS_BLENDER_CID); /* Maximum depth of save() which has style information saved */ #define STYLE_STACK_DEPTH 50 #define STYLE_CURRENT_STACK ((mSaveCount 1.0) return NS_ERROR_DOM_INDEX_SIZE_ERR; nsresult rv = mCSSParser->ParseColorString(nsString(colorstr), nsnull, 0, PR_TRUE, &color); if (NS_FAILED(rv)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_pattern_add_color_stop_rgba (mPattern, (double) offset, NS_GET_R(color) / 255.0, NS_GET_G(color) / 255.0, NS_GET_B(color) / 255.0, NS_GET_A(color) / 255.0); return NS_OK; } NS_DECL_ISUPPORTS protected: cairo_pattern_t *mPattern; nsCOMPtr mCSSParser; }; #ifndef MOZILLA_1_8_BRANCH NS_DEFINE_STATIC_IID_ACCESSOR(nsCanvasGradient, NS_CANVASGRADIENT_PRIVATE_IID) #endif NS_IMPL_ADDREF(nsCanvasGradient) NS_IMPL_RELEASE(nsCanvasGradient) NS_INTERFACE_MAP_BEGIN(nsCanvasGradient) NS_INTERFACE_MAP_ENTRY(nsCanvasGradient) NS_INTERFACE_MAP_ENTRY(nsIDOMCanvasGradient) NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(CanvasGradient) NS_INTERFACE_MAP_ENTRY(nsISupports) NS_INTERFACE_MAP_END /** ** nsCanvasPattern **/ #define NS_CANVASPATTERN_PRIVATE_IID \ { 0xb85c6c8a, 0x0624, 0x4530, { 0xb8, 0xee, 0xff, 0xdf, 0x42, 0xe8, 0x21, 0x6d } } class nsCanvasPattern : public nsIDOMCanvasPattern { public: #ifdef MOZILLA_1_8_BRANCH NS_DEFINE_STATIC_IID_ACCESSOR(NS_CANVASPATTERN_PRIVATE_IID) #else NS_DECLARE_STATIC_IID_ACCESSOR(NS_CANVASPATTERN_PRIVATE_IID) #endif nsCanvasPattern(cairo_pattern_t *cpat, PRUint8 *dataToFree, nsIURI* URIForSecurityCheck, PRBool forceWriteOnly) : mPattern(cpat), mData(dataToFree), mURI(URIForSecurityCheck), mForceWriteOnly(forceWriteOnly) { } ~nsCanvasPattern() { if (mPattern) cairo_pattern_destroy(mPattern); if (mData) nsMemory::Free(mData); } void Apply(cairo_t *cairo) { cairo_set_source(cairo, mPattern); } nsIURI* GetURI() { return mURI; } PRBool GetForceWriteOnly() { return mForceWriteOnly; } NS_DECL_ISUPPORTS protected: cairo_pattern_t *mPattern; PRUint8 *mData; nsCOMPtr mURI; PRPackedBool mForceWriteOnly; }; #ifndef MOZILLA_1_8_BRANCH NS_DEFINE_STATIC_IID_ACCESSOR(nsCanvasPattern, NS_CANVASPATTERN_PRIVATE_IID) #endif NS_IMPL_ADDREF(nsCanvasPattern) NS_IMPL_RELEASE(nsCanvasPattern) NS_INTERFACE_MAP_BEGIN(nsCanvasPattern) NS_INTERFACE_MAP_ENTRY(nsCanvasPattern) NS_INTERFACE_MAP_ENTRY(nsIDOMCanvasPattern) NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(CanvasPattern) NS_INTERFACE_MAP_ENTRY(nsISupports) NS_INTERFACE_MAP_END /** ** nsCanvasRenderingContext2D **/ class nsCanvasRenderingContext2D : public nsIDOMCanvasRenderingContext2D, public nsICanvasRenderingContextInternal { public: nsCanvasRenderingContext2D(); virtual ~nsCanvasRenderingContext2D(); nsresult Redraw(); void SetCairoColor(nscolor c); // nsICanvasRenderingContextInternal NS_IMETHOD SetCanvasElement(nsICanvasElement* aParentCanvas); NS_IMETHOD SetDimensions(PRInt32 width, PRInt32 height); NS_IMETHOD Render(nsIRenderingContext *rc); NS_IMETHOD RenderToSurface(cairo_surface_t *surf); NS_IMETHOD GetInputStream(const nsACString& aMimeType, const nsAString& aEncoderOptions, nsIInputStream **aStream); // nsISupports interface NS_DECL_ISUPPORTS // nsIDOMCanvasRenderingContext2D interface NS_DECL_NSIDOMCANVASRENDERINGCONTEXT2D protected: // destroy cairo/image stuff, in preparation for possibly recreating void Destroy(); nsIFrame *GetCanvasLayoutFrame(); // Some helpers. Doesn't modify acolor on failure. enum { STYLE_STROKE = 0, STYLE_FILL, STYLE_SHADOW //STYLE_MAX }; // VC6 sucks #define STYLE_MAX 3 nsresult SetStyleFromVariant(nsIVariant* aStyle, PRInt32 aWhichStyle); void StyleColorToString(const nscolor& aColor, nsAString& aStr); void DirtyAllStyles(); void ApplyStyle(PRInt32 aWhichStyle); // If aURI has a different origin than the current script, then // we make the canvas write-only so bad guys can't extract the pixel // data. If forceWriteOnly is set, we force write only to be set // and ignore aURI. (This is used for when the original data came // from a that had write-only set.) void DoDrawImageSecurityCheck(nsIURI* aURI, PRBool forceWriteOnly); // Member vars PRInt32 mWidth, mHeight; // the canvas element informs us when it's going away, // so these are not nsCOMPtrs nsICanvasElement* mCanvasElement; // our CSS parser, for colors and whatnot nsCOMPtr mCSSParser; // yay cairo #ifdef MOZ_CAIRO_GFX nsRefPtr mThebesContext; nsRefPtr mThebesSurface; #endif PRUint32 mSaveCount; cairo_t *mCairo; cairo_surface_t *mSurface; // only non-null if mSurface is an image surface PRUint8 *mImageSurfaceData; // style handling PRInt32 mLastStyle; PRPackedBool mDirtyStyle[STYLE_MAX]; // state stack handling class ContextState { public: ContextState() : globalAlpha(1.0) { } ContextState(const ContextState& other) : globalAlpha(other.globalAlpha) { for (int i = 0; i < STYLE_MAX; i++) { colorStyles[i] = other.colorStyles[i]; gradientStyles[i] = other.gradientStyles[i]; patternStyles[i] = other.patternStyles[i]; } } inline void SetColorStyle(int whichStyle, nscolor color) { colorStyles[whichStyle] = color; gradientStyles[whichStyle] = nsnull; patternStyles[whichStyle] = nsnull; } inline void SetPatternStyle(int whichStyle, nsCanvasPattern* pat) { gradientStyles[whichStyle] = nsnull; patternStyles[whichStyle] = pat; } inline void SetGradientStyle(int whichStyle, nsCanvasGradient* grad) { gradientStyles[whichStyle] = grad; patternStyles[whichStyle] = nsnull; } float globalAlpha; nscolor colorStyles[STYLE_MAX]; nsCOMPtr gradientStyles[STYLE_MAX]; nsCOMPtr patternStyles[STYLE_MAX]; }; nsTArray mStyleStack; inline ContextState& CurrentState() { return mStyleStack[mSaveCount]; } #ifdef MOZ_WIDGET_GTK2 Pixmap mSurfacePixmap; #endif // stolen from nsJSUtils static PRBool ConvertJSValToUint32(PRUint32* aProp, JSContext* aContext, jsval aValue); static PRBool ConvertJSValToXPCObject(nsISupports** aSupports, REFNSIID aIID, JSContext* aContext, jsval aValue); static PRBool ConvertJSValToDouble(double* aProp, JSContext* aContext, jsval aValue); // cairo helpers nsresult CairoSurfaceFromElement(nsIDOMElement *imgElt, cairo_surface_t **aCairoSurface, PRUint8 **imgDataOut, PRInt32 *widthOut, PRInt32 *heightOut, nsIURI **uriOut, PRBool *forceWriteOnlyOut); nsresult DrawNativeSurfaces(nsIDrawingSurface* aBlackSurface, nsIDrawingSurface* aWhiteSurface, const nsIntSize& aSurfaceSize, nsIRenderingContext* aBlackContext); }; NS_IMPL_ADDREF(nsCanvasRenderingContext2D) NS_IMPL_RELEASE(nsCanvasRenderingContext2D) NS_INTERFACE_MAP_BEGIN(nsCanvasRenderingContext2D) NS_INTERFACE_MAP_ENTRY(nsIDOMCanvasRenderingContext2D) NS_INTERFACE_MAP_ENTRY(nsICanvasRenderingContextInternal) NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMCanvasRenderingContext2D) NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(CanvasRenderingContext2D) NS_INTERFACE_MAP_END /** ** CanvasRenderingContext2D impl **/ nsresult NS_NewCanvasRenderingContext2D(nsIDOMCanvasRenderingContext2D** aResult) { nsIDOMCanvasRenderingContext2D* ctx = new nsCanvasRenderingContext2D(); if (!ctx) return NS_ERROR_OUT_OF_MEMORY; NS_ADDREF(*aResult = ctx); return NS_OK; } nsCanvasRenderingContext2D::nsCanvasRenderingContext2D() : mCanvasElement(nsnull), mSaveCount(0), mCairo(nsnull), mSurface(nsnull), mImageSurfaceData(nsnull), mStyleStack(20) { #ifdef MOZ_WIDGET_GTK2 mSurfacePixmap = None; #endif } nsCanvasRenderingContext2D::~nsCanvasRenderingContext2D() { Destroy(); } nsIFrame* nsCanvasRenderingContext2D::GetCanvasLayoutFrame() { if (!mCanvasElement) return nsnull; nsIFrame *fr = nsnull; mCanvasElement->GetPrimaryCanvasFrame(&fr); return fr; } void nsCanvasRenderingContext2D::Destroy() { if (mCairo) { cairo_destroy(mCairo); mCairo = nsnull; } if (mSurface) { cairo_surface_destroy(mSurface); mSurface = nsnull; } #ifdef MOZ_WIDGET_GTK2 if (mSurfacePixmap != None) { XFreePixmap(GDK_DISPLAY(), mSurfacePixmap); mSurfacePixmap = None; } #endif if (mImageSurfaceData) { PR_Free (mImageSurfaceData); mImageSurfaceData = nsnull; } } nsresult nsCanvasRenderingContext2D::SetStyleFromVariant(nsIVariant* aStyle, PRInt32 aWhichStyle) { nsresult rv; nscolor color; PRUint16 paramType; rv = aStyle->GetDataType(¶mType); NS_ENSURE_SUCCESS(rv, rv); if (paramType == nsIDataType::VTYPE_DOMSTRING || paramType == nsIDataType::VTYPE_WSTRING_SIZE_IS) { nsAutoString str; if (paramType == nsIDataType::VTYPE_DOMSTRING) { rv = aStyle->GetAsDOMString(str); } else { rv = aStyle->GetAsAString(str); } NS_ENSURE_SUCCESS(rv, rv); rv = mCSSParser->ParseColorString(str, nsnull, 0, PR_TRUE, &color); if (NS_FAILED(rv)) { // Error reporting happens inside the CSS parser return NS_OK; } CurrentState().SetColorStyle(aWhichStyle, color); mDirtyStyle[aWhichStyle] = PR_TRUE; return NS_OK; } else if (paramType == nsIDataType::VTYPE_INTERFACE || paramType == nsIDataType::VTYPE_INTERFACE_IS) { nsID *iid; nsCOMPtr iface; rv = aStyle->GetAsInterface(&iid, getter_AddRefs(iface)); nsCOMPtr grad(do_QueryInterface(iface)); if (grad) { CurrentState().SetGradientStyle(aWhichStyle, grad); mDirtyStyle[aWhichStyle] = PR_TRUE; return NS_OK; } nsCOMPtr pattern(do_QueryInterface(iface)); if (pattern) { CurrentState().SetPatternStyle(aWhichStyle, pattern); mDirtyStyle[aWhichStyle] = PR_TRUE; return NS_OK; } } nsContentUtils::ReportToConsole( nsContentUtils::eDOM_PROPERTIES, "UnexpectedCanvasVariantStyle", nsnull, 0, nsnull, EmptyString(), 0, 0, nsIScriptError::warningFlag, "Canvas"); return NS_OK; } void nsCanvasRenderingContext2D::StyleColorToString(const nscolor& aColor, nsAString& aStr) { if (NS_GET_A(aColor) == 255) { CopyUTF8toUTF16(nsPrintfCString(100, "#%02x%02x%02x", NS_GET_R(aColor), NS_GET_G(aColor), NS_GET_B(aColor)), aStr); } else { // "%0.5f" in nsPrintfCString would use the locale-specific // decimal separator. That's why we have to do this: PRUint32 alpha = NS_GET_A(aColor) * 100000 / 255; CopyUTF8toUTF16(nsPrintfCString(100, "rgba(%d, %d, %d, 0.%d)", NS_GET_R(aColor), NS_GET_G(aColor), NS_GET_B(aColor), alpha), aStr); } } void nsCanvasRenderingContext2D::DirtyAllStyles() { for (int i = 0; i < STYLE_MAX; i++) { mDirtyStyle[i] = PR_TRUE; } } void nsCanvasRenderingContext2D::DoDrawImageSecurityCheck(nsIURI* aURI, PRBool forceWriteOnly) { if (mCanvasElement->IsWriteOnly()) return; // If we explicitly set WriteOnly just do it and get out if (forceWriteOnly) { mCanvasElement->SetWriteOnly(); return; } // Further security checks require a URI. If we don't have one the image // must be another canvas and we inherit the forceWriteOnly state if (!aURI) return; nsIScriptSecurityManager* ssm = nsContentUtils::GetSecurityManager(); #ifdef MOZILLA_1_8_BRANCH nsCOMPtr elem = do_QueryInterface(mCanvasElement); if (elem && ssm) { nsCOMPtr elemPrincipal; nsCOMPtr uriPrincipal; nsCOMPtr elemDocument; nsContentUtils::GetDocumentAndPrincipal(elem, getter_AddRefs(elemDocument), getter_AddRefs(elemPrincipal)); ssm->GetCodebasePrincipal(aURI, getter_AddRefs(uriPrincipal)); if (uriPrincipal && elemPrincipal) { nsresult rv = ssm->CheckSameOriginPrincipal(elemPrincipal, uriPrincipal); if (NS_SUCCEEDED(rv)) { // Same origin return; } } } #else nsCOMPtr elem = do_QueryInterface(mCanvasElement); if (elem && ssm) { nsCOMPtr uriPrincipal; ssm->GetCodebasePrincipal(aURI, getter_AddRefs(uriPrincipal)); if (uriPrincipal) { nsresult rv = ssm->CheckSameOriginPrincipal(elem->NodePrincipal(), uriPrincipal); if (NS_SUCCEEDED(rv)) { // Same origin return; } } } #endif mCanvasElement->SetWriteOnly(); } void nsCanvasRenderingContext2D::ApplyStyle(PRInt32 aWhichStyle) { if (mLastStyle == aWhichStyle && !mDirtyStyle[aWhichStyle]) { // nothing to do, this is already the set style return; } mDirtyStyle[aWhichStyle] = PR_FALSE; mLastStyle = aWhichStyle; nsCanvasPattern* pattern = CurrentState().patternStyles[aWhichStyle]; if (pattern) { DoDrawImageSecurityCheck(pattern->GetURI(), pattern->GetForceWriteOnly()); pattern->Apply(mCairo); return; } if (CurrentState().gradientStyles[aWhichStyle]) { CurrentState().gradientStyles[aWhichStyle]->Apply(mCairo); return; } SetCairoColor(CurrentState().colorStyles[aWhichStyle]); } nsresult nsCanvasRenderingContext2D::Redraw() { nsIFrame *frame = GetCanvasLayoutFrame(); if (frame) { nsRect r = frame->GetRect(); r.x = r.y = 0; frame->Invalidate(r, PR_FALSE); } return NS_OK; } void nsCanvasRenderingContext2D::SetCairoColor(nscolor c) { double r = double(NS_GET_R(c) / 255.0); double g = double(NS_GET_G(c) / 255.0); double b = double(NS_GET_B(c) / 255.0); double a = double(NS_GET_A(c) / 255.0) * CurrentState().globalAlpha; cairo_set_source_rgba (mCairo, r, g, b, a); } NS_IMETHODIMP nsCanvasRenderingContext2D::SetDimensions(PRInt32 width, PRInt32 height) { Destroy(); // Check that the dimensions are sane if (!CheckSaneImageSize(width, height)) return NS_ERROR_FAILURE; mWidth = width; mHeight = height; #ifdef MOZ_CAIRO_GFX mThebesSurface = gfxPlatform::GetPlatform()->CreateOffscreenSurface(gfxIntSize(width, height), gfxASurface::ImageFormatARGB32); mThebesContext = new gfxContext(mThebesSurface); mSurface = mThebesSurface->CairoSurface(); cairo_surface_reference(mSurface); mCairo = mThebesContext->GetCairo(); cairo_reference(mCairo); #else // non-cairo gfx #ifdef XP_WIN #ifndef MOZILLA_1_8_BRANCH mSurface = cairo_win32_surface_create_with_dib (CAIRO_FORMAT_ARGB32, mWidth, mHeight); #else mSurface = _cairo_win32_surface_create_dib (CAIRO_FORMAT_ARGB32, mWidth, mHeight); #endif #elif MOZ_WIDGET_GTK2 // On most current X servers, using the software-only surface // actually provides a much smoother and faster display. // However, we provide MOZ_CANVAS_USE_RENDER for whomever wants to // go that route. if (getenv("MOZ_CANVAS_USE_RENDER")) { XRenderPictFormat *fmt = XRenderFindStandardFormat (GDK_DISPLAY(), PictStandardARGB32); if (fmt) { int npfmts = 0; XPixmapFormatValues *pfmts = XListPixmapFormats(GDK_DISPLAY(), &npfmts); for (int i = 0; i < npfmts; i++) { if (pfmts[i].depth == 32) { npfmts = -1; break; } } XFree(pfmts); if (npfmts == -1) { mSurfacePixmap = XCreatePixmap (GDK_DISPLAY(), DefaultRootWindow(GDK_DISPLAY()), width, height, 32); mSurface = cairo_xlib_surface_create_with_xrender_format (GDK_DISPLAY(), mSurfacePixmap, DefaultScreenOfDisplay(GDK_DISPLAY()), fmt, mWidth, mHeight); } } } #endif // fall back to image surface if (!mSurface) { mImageSurfaceData = (PRUint8*) PR_Malloc (mWidth * mHeight * 4); if (!mImageSurfaceData) return NS_ERROR_OUT_OF_MEMORY; mSurface = cairo_image_surface_create_for_data (mImageSurfaceData, CAIRO_FORMAT_ARGB32, mWidth, mHeight, mWidth * 4); } mCairo = cairo_create(mSurface); #endif // set up the initial canvas defaults mStyleStack.Clear(); mSaveCount = 0; ContextState *state = mStyleStack.AppendElement(); state->globalAlpha = 1.0; for (int i = 0; i < STYLE_MAX; i++) state->colorStyles[i] = NS_RGB(0,0,0); mLastStyle = -1; DirtyAllStyles(); cairo_set_operator(mCairo, CAIRO_OPERATOR_CLEAR); cairo_new_path(mCairo); cairo_rectangle(mCairo, 0, 0, mWidth, mHeight); cairo_fill(mCairo); cairo_set_line_width(mCairo, 1.0); cairo_set_operator(mCairo, CAIRO_OPERATOR_OVER); cairo_set_miter_limit(mCairo, 10.0); cairo_set_line_cap(mCairo, CAIRO_LINE_CAP_BUTT); cairo_set_line_join(mCairo, CAIRO_LINE_JOIN_MITER); cairo_new_path(mCairo); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::Render(nsIRenderingContext *rc) { nsresult rv = NS_OK; #ifdef MOZ_CAIRO_GFX gfxContext* ctx = (gfxContext*) rc->GetNativeGraphicData(nsIRenderingContext::NATIVE_THEBES_CONTEXT); nsRefPtr pat = new gfxPattern(mThebesSurface); // XXX I don't want to use PixelSnapped here, but layout doesn't guarantee // pixel alignment for this stuff! ctx->NewPath(); ctx->PixelSnappedRectangleAndSetPattern(gfxRect(0, 0, mWidth, mHeight), pat); ctx->Fill(); #else // non-Thebes; this becomes exciting cairo_surface_t *dest = nsnull; cairo_t *dest_cr = nsnull; #ifdef XP_WIN void *ptr = nsnull; #ifdef MOZILLA_1_8_BRANCH rv = rc->RetrieveCurrentNativeGraphicData(&ptr); if (NS_FAILED(rv) || !ptr) return NS_ERROR_FAILURE; #else ptr = rc->GetNativeGraphicData(nsIRenderingContext::NATIVE_WINDOWS_DC); #endif HDC dc = (HDC) ptr; dest = cairo_win32_surface_create (dc); dest_cr = cairo_create (dest); #endif #ifdef XP_OS2 void *ptr = nsnull; #ifdef MOZILLA_1_8_BRANCH rv = rc->RetrieveCurrentNativeGraphicData(&ptr); if (NS_FAILED(rv) || !ptr) return NS_ERROR_FAILURE; #else /* OS/2 also uses NATIVE_WINDOWS_DC to get a native OS/2 PS */ ptr = rc->GetNativeGraphicData(nsIRenderingContext::NATIVE_WINDOWS_DC); #endif HPS hps = (HPS)ptr; nsDrawingSurfaceOS2 *surface; /* to get the dimensions from this */ PRUint32 width, height; rc->GetDrawingSurface((nsIDrawingSurface**)&surface); surface->GetDimensions(&width, &height); dest = cairo_os2_surface_create(hps, width, height); cairo_surface_mark_dirty(dest); // needed on OS/2 for initialization dest_cr = cairo_create(dest); #endif #ifdef MOZ_WIDGET_GTK2 GdkDrawable *gdkdraw = nsnull; #ifdef MOZILLA_1_8_BRANCH rv = rc->RetrieveCurrentNativeGraphicData((void**) &gdkdraw); if (NS_FAILED(rv) || !gdkdraw) return NS_ERROR_FAILURE; #else gdkdraw = (GdkDrawable*) rc->GetNativeGraphicData(nsIRenderingContext::NATIVE_GDK_DRAWABLE); if (!gdkdraw) return NS_ERROR_FAILURE; #endif gint w, h; gdk_drawable_get_size (gdkdraw, &w, &h); dest = cairo_xlib_surface_create (GDK_DRAWABLE_XDISPLAY(gdkdraw), GDK_DRAWABLE_XID(gdkdraw), GDK_VISUAL_XVISUAL(gdk_drawable_get_visual(gdkdraw)), w, h); dest_cr = cairo_create (dest); #endif nsTransform2D *tx = nsnull; rc->GetCurrentTransform(tx); nsCOMPtr dctx; rc->GetDeviceContext(*getter_AddRefs(dctx)); // Until we can use the quartz2 surface, mac will be different, // since we'll use CG to render. #ifndef XP_MACOSX float x0 = 0.0, y0 = 0.0; float sx = 1.0, sy = 1.0; if (tx->GetType() & MG_2DTRANSLATION) { tx->Transform(&x0, &y0); } if (tx->GetType() & MG_2DSCALE) { sx = sy = dctx->DevUnitsToTwips(); tx->TransformNoXLate(&sx, &sy); } cairo_translate (dest_cr, NSToIntRound(x0), NSToIntRound(y0)); if (sx != 1.0 || sy != 1.0) cairo_scale (dest_cr, sx, sy); cairo_rectangle (dest_cr, 0, 0, mWidth, mHeight); cairo_clip (dest_cr); cairo_set_source_surface (dest_cr, mSurface, 0, 0); cairo_paint (dest_cr); if (dest_cr) cairo_destroy (dest_cr); if (dest) cairo_surface_destroy (dest); #else // OSX path nsIDrawingSurface *ds = nsnull; rc->GetDrawingSurface(&ds); if (!ds) return NS_ERROR_FAILURE; nsDrawingSurfaceMac *macds = NS_STATIC_CAST(nsDrawingSurfaceMac*, ds); CGContextRef cgc = macds->StartQuartzDrawing(); CGDataProviderRef dataProvider; CGImageRef img; dataProvider = CGDataProviderCreateWithData (NULL, mImageSurfaceData, mWidth * mHeight * 4, NULL); CGColorSpaceRef rgb = CGColorSpaceCreateDeviceRGB(); img = CGImageCreate (mWidth, mHeight, 8, 32, mWidth * 4, rgb, (CGImageAlphaInfo)(kCGImageAlphaPremultipliedFirst | CG_BITMAP_BYTE_ORDER_FLAG), dataProvider, NULL, false, kCGRenderingIntentDefault); CGColorSpaceRelease (rgb); CGDataProviderRelease (dataProvider); float x0 = 0.0, y0 = 0.0; float sx = 1.0, sy = 1.0; if (tx->GetType() & MG_2DTRANSLATION) { tx->Transform(&x0, &y0); } if (tx->GetType() & MG_2DSCALE) { float p2t = dctx->DevUnitsToTwips(); sx = p2t, sy = p2t; tx->TransformNoXLate(&sx, &sy); } CGContextTranslateCTM (cgc, NSToIntRound(x0), NSToIntRound(y0)); if (sx != 1.0 || sy != 1.0) CGContextScaleCTM (cgc, sx, sy); // flip, so that the image gets drawn correct-side up CGContextScaleCTM (cgc, 1.0, -1.0); CGContextDrawImage (cgc, CGRectMake(0, -mHeight, mWidth, mHeight), img); CGImageRelease (img); macds->EndQuartzDrawing(cgc); rv = NS_OK; #endif #endif return rv; } NS_IMETHODIMP nsCanvasRenderingContext2D::RenderToSurface(cairo_surface_t *surf) { cairo_t *cr = cairo_create (surf); cairo_set_source_surface (cr, mSurface, 0, 0); cairo_paint (cr); cairo_destroy (cr); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::GetInputStream(const nsACString& aMimeType, const nsAString& aEncoderOptions, nsIInputStream **aStream) { nsCString conid(NS_LITERAL_CSTRING("@mozilla.org/image/encoder;2?type=")); conid += aMimeType; nsCOMPtr encoder = do_CreateInstance(conid.get()); if (!encoder) return NS_ERROR_FAILURE; if (mImageSurfaceData) { encoder->InitFromData(mImageSurfaceData, mWidth * mHeight * 4, mWidth, mHeight, mWidth * 4, imgIEncoder::INPUT_FORMAT_HOSTARGB, aEncoderOptions); } else { nsAutoArrayPtr imageBuffer(new PRUint8[mWidth * mHeight * 4]); if (!imageBuffer) return NS_ERROR_FAILURE; cairo_surface_t *imgsurf = cairo_image_surface_create_for_data (imageBuffer.get(), CAIRO_FORMAT_ARGB32, mWidth, mHeight, mWidth * 4); if (!imgsurf || cairo_surface_status(imgsurf)) return NS_ERROR_FAILURE; cairo_t *cr = cairo_create(imgsurf); cairo_surface_destroy (imgsurf); cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); cairo_set_source_surface (cr, mSurface, 0, 0); cairo_paint (cr); cairo_destroy (cr); encoder->InitFromData(imageBuffer.get(), mWidth * mHeight * 4, mWidth, mHeight, mWidth * 4, imgIEncoder::INPUT_FORMAT_HOSTARGB, aEncoderOptions); } return CallQueryInterface(encoder, aStream); } // // nsCanvasRenderingContext2D impl // NS_IMETHODIMP nsCanvasRenderingContext2D::SetCanvasElement(nsICanvasElement* aCanvasElement) { // don't hold a ref to this! mCanvasElement = aCanvasElement; // set up our css parser, if necessary if (!mCSSParser) { mCSSParser = do_CreateInstance("@mozilla.org/content/css-parser;1"); } return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::GetCanvas(nsIDOMHTMLCanvasElement **canvas) { if (mCanvasElement == nsnull) { *canvas = nsnull; return NS_OK; } return CallQueryInterface(mCanvasElement, canvas); } // // state // NS_IMETHODIMP nsCanvasRenderingContext2D::Save() { ContextState state = CurrentState(); mStyleStack.AppendElement(state); cairo_save (mCairo); mSaveCount++; return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::Restore() { if (mSaveCount <= 0) return NS_ERROR_DOM_INVALID_STATE_ERR; mStyleStack.RemoveElementAt(mSaveCount); cairo_restore (mCairo); mLastStyle = -1; DirtyAllStyles(); mSaveCount--; return NS_OK; } // // transformations // NS_IMETHODIMP nsCanvasRenderingContext2D::Scale(float x, float y) { if (!FloatValidate(x,y)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_scale (mCairo, x, y); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::Rotate(float angle) { if (!FloatValidate(angle)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_rotate (mCairo, angle); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::Translate(float x, float y) { if (!FloatValidate(x,y)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_translate (mCairo, x, y); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::Transform(float m11, float m12, float m21, float m22, float dx, float dy) { if (!FloatValidate(m11,m12,m21,m22,dx,dy)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_matrix_t mat; cairo_matrix_init (&mat, m11, m12, m21, m22, dx, dy); cairo_transform (mCairo, &mat); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::SetTransform(float m11, float m12, float m21, float m22, float dx, float dy) { if (!FloatValidate(m11,m12,m21,m22,dx,dy)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_matrix_t mat; cairo_matrix_init (&mat, m11, m12, m21, m22, dx, dy); cairo_set_matrix (mCairo, &mat); return NS_OK; } // // colors // NS_IMETHODIMP nsCanvasRenderingContext2D::SetGlobalAlpha(float aGlobalAlpha) { if (!FloatValidate(aGlobalAlpha)) return NS_ERROR_DOM_SYNTAX_ERR; // ignore invalid values, as per spec if (aGlobalAlpha < 0.0 || aGlobalAlpha > 1.0) return NS_OK; CurrentState().globalAlpha = aGlobalAlpha; return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::GetGlobalAlpha(float *aGlobalAlpha) { *aGlobalAlpha = CurrentState().globalAlpha; return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::SetStrokeStyle(nsIVariant* aStyle) { return SetStyleFromVariant(aStyle, STYLE_STROKE); } NS_IMETHODIMP nsCanvasRenderingContext2D::GetStrokeStyle(nsIVariant** aStyle) { nsresult rv; nsCOMPtr var = do_CreateInstance("@mozilla.org/variant;1"); if (!var) return NS_ERROR_FAILURE; rv = var->SetWritable(PR_TRUE); NS_ENSURE_SUCCESS(rv, rv); if (CurrentState().patternStyles[STYLE_STROKE]) { rv = var->SetAsISupports(CurrentState().patternStyles[STYLE_STROKE]); NS_ENSURE_SUCCESS(rv, rv); } else if (CurrentState().gradientStyles[STYLE_STROKE]) { rv = var->SetAsISupports(CurrentState().gradientStyles[STYLE_STROKE]); NS_ENSURE_SUCCESS(rv, rv); } else { nsString styleStr; StyleColorToString(CurrentState().colorStyles[STYLE_STROKE], styleStr); rv = var->SetAsDOMString(styleStr); NS_ENSURE_SUCCESS(rv, rv); } NS_ADDREF(*aStyle = var); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::SetFillStyle(nsIVariant* aStyle) { return SetStyleFromVariant(aStyle, STYLE_FILL); } NS_IMETHODIMP nsCanvasRenderingContext2D::GetFillStyle(nsIVariant** aStyle) { nsresult rv; nsCOMPtr var = do_CreateInstance("@mozilla.org/variant;1"); if (!var) return NS_ERROR_FAILURE; rv = var->SetWritable(PR_TRUE); NS_ENSURE_SUCCESS(rv, rv); if (CurrentState().patternStyles[STYLE_FILL]) { rv = var->SetAsISupports(CurrentState().patternStyles[STYLE_FILL]); NS_ENSURE_SUCCESS(rv, rv); } else if (CurrentState().gradientStyles[STYLE_FILL]) { rv = var->SetAsISupports(CurrentState().gradientStyles[STYLE_FILL]); NS_ENSURE_SUCCESS(rv, rv); } else { nsString styleStr; StyleColorToString(CurrentState().colorStyles[STYLE_FILL], styleStr); rv = var->SetAsDOMString(styleStr); NS_ENSURE_SUCCESS(rv, rv); } NS_ADDREF(*aStyle = var); return NS_OK; } // // gradients and patterns // NS_IMETHODIMP nsCanvasRenderingContext2D::CreateLinearGradient(float x0, float y0, float x1, float y1, nsIDOMCanvasGradient **_retval) { if (!FloatValidate(x0,y0,x1,y1)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_pattern_t *gradpat = nsnull; gradpat = cairo_pattern_create_linear ((double) x0, (double) y0, (double) x1, (double) y1); nsCanvasGradient *grad = new nsCanvasGradient(gradpat, mCSSParser); if (!grad) { cairo_pattern_destroy(gradpat); return NS_ERROR_OUT_OF_MEMORY; } NS_ADDREF(*_retval = grad); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::CreateRadialGradient(float x0, float y0, float r0, float x1, float y1, float r1, nsIDOMCanvasGradient **_retval) { if (!FloatValidate(x0,y0,r0,x1,y1,r1)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_pattern_t *gradpat = nsnull; gradpat = cairo_pattern_create_radial ((double) x0, (double) y0, (double) r0, (double) x1, (double) y1, (double) r1); nsCanvasGradient *grad = new nsCanvasGradient(gradpat, mCSSParser); if (!grad) { cairo_pattern_destroy(gradpat); return NS_ERROR_OUT_OF_MEMORY; } NS_ADDREF(*_retval = grad); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::CreatePattern(nsIDOMHTMLElement *image, const nsAString& repeat, nsIDOMCanvasPattern **_retval) { nsresult rv; cairo_extend_t extend; if (repeat.IsEmpty() || repeat.EqualsLiteral("repeat")) { extend = CAIRO_EXTEND_REPEAT; } else if (repeat.EqualsLiteral("repeat-x")) { // XX extend = CAIRO_EXTEND_REPEAT; } else if (repeat.EqualsLiteral("repeat-y")) { // XX extend = CAIRO_EXTEND_REPEAT; } else if (repeat.EqualsLiteral("no-repeat")) { extend = CAIRO_EXTEND_NONE; } else { // XXX ERRMSG we need to report an error to developers here! (bug 329026) return NS_ERROR_DOM_SYNTAX_ERR; } cairo_surface_t *imgSurf = nsnull; PRUint8 *imgData = nsnull; PRInt32 imgWidth, imgHeight; nsCOMPtr uri; PRBool forceWriteOnly = PR_FALSE; rv = CairoSurfaceFromElement(image, &imgSurf, &imgData, &imgWidth, &imgHeight, getter_AddRefs(uri), &forceWriteOnly); if (NS_FAILED(rv)) return rv; cairo_pattern_t *cairopat = cairo_pattern_create_for_surface(imgSurf); cairo_surface_destroy(imgSurf); cairo_pattern_set_extend (cairopat, extend); nsCanvasPattern *pat = new nsCanvasPattern(cairopat, imgData, uri, forceWriteOnly); if (!pat) { cairo_pattern_destroy(cairopat); nsMemory::Free(imgData); return NS_ERROR_OUT_OF_MEMORY; } NS_ADDREF(*_retval = pat); return NS_OK; } // // shadows // NS_IMETHODIMP nsCanvasRenderingContext2D::SetShadowOffsetX(float x) { if (!FloatValidate(x)) return NS_ERROR_DOM_SYNTAX_ERR; // XXX ERRMSG we need to report an error to developers here! (bug 329026) return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::GetShadowOffsetX(float *x) { *x = 0.0f; return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::SetShadowOffsetY(float y) { if (!FloatValidate(y)) return NS_ERROR_DOM_SYNTAX_ERR; // XXX ERRMSG we need to report an error to developers here! (bug 329026) return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::GetShadowOffsetY(float *y) { *y = 0.0f; return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::SetShadowBlur(float blur) { if (!FloatValidate(blur)) return NS_ERROR_DOM_SYNTAX_ERR; // XXX ERRMSG we need to report an error to developers here! (bug 329026) return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::GetShadowBlur(float *blur) { *blur = 0.0f; return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::SetShadowColor(const nsAString& color) { // XXX ERRMSG we need to report an error to developers here! (bug 329026) return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::GetShadowColor(nsAString& color) { color.SetIsVoid(PR_TRUE); return NS_OK; } // // rects // NS_IMETHODIMP nsCanvasRenderingContext2D::ClearRect(float x, float y, float w, float h) { if (!FloatValidate(x,y,w,h)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_save (mCairo); cairo_set_operator (mCairo, CAIRO_OPERATOR_CLEAR); cairo_new_path (mCairo); cairo_rectangle (mCairo, x, y, w, h); cairo_fill (mCairo); cairo_restore (mCairo); return Redraw(); } NS_IMETHODIMP nsCanvasRenderingContext2D::FillRect(float x, float y, float w, float h) { if (!FloatValidate(x,y,w,h)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_new_path (mCairo); cairo_rectangle (mCairo, x, y, w, h); ApplyStyle(STYLE_FILL); cairo_fill (mCairo); return Redraw(); } NS_IMETHODIMP nsCanvasRenderingContext2D::StrokeRect(float x, float y, float w, float h) { if (!FloatValidate(x,y,w,h)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_new_path (mCairo); cairo_rectangle (mCairo, x, y, w, h); ApplyStyle(STYLE_STROKE); cairo_stroke (mCairo); return Redraw(); } // // path bits // NS_IMETHODIMP nsCanvasRenderingContext2D::BeginPath() { cairo_new_path(mCairo); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::ClosePath() { cairo_close_path(mCairo); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::Fill() { ApplyStyle(STYLE_FILL); cairo_fill_preserve(mCairo); return Redraw(); } NS_IMETHODIMP nsCanvasRenderingContext2D::Stroke() { ApplyStyle(STYLE_STROKE); cairo_stroke_preserve(mCairo); return Redraw(); } NS_IMETHODIMP nsCanvasRenderingContext2D::Clip() { cairo_clip_preserve(mCairo); return Redraw(); } NS_IMETHODIMP nsCanvasRenderingContext2D::MoveTo(float x, float y) { if (!FloatValidate(x,y)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_move_to(mCairo, x, y); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::LineTo(float x, float y) { if (!FloatValidate(x,y)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_line_to(mCairo, x, y); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::QuadraticCurveTo(float cpx, float cpy, float x, float y) { if (!FloatValidate(cpx,cpy,x,y)) return NS_ERROR_DOM_SYNTAX_ERR; double cx, cy; // we will always have a current point, since beginPath forces // a moveto(0,0) cairo_get_current_point(mCairo, &cx, &cy); cairo_curve_to(mCairo, (cx + cpx * 2.0) / 3.0, (cy + cpy * 2.0) / 3.0, (cpx * 2.0 + x) / 3.0, (cpy * 2.0 + y) / 3.0, x, y); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::BezierCurveTo(float cp1x, float cp1y, float cp2x, float cp2y, float x, float y) { if (!FloatValidate(cp1x,cp1y,cp2x,cp2y,x,y)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_curve_to(mCairo, cp1x, cp1y, cp2x, cp2y, x, y); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::ArcTo(float x1, float y1, float x2, float y2, float radius) { if (!FloatValidate(x1,y1,x2,y2,radius)) return NS_ERROR_DOM_SYNTAX_ERR; if (radius <= 0) return NS_ERROR_DOM_INDEX_SIZE_ERR; /* This is an adaptation of the cairo_arc_to patch from Behdad * Esfahbod; once that patch is accepted, we should remove this * and just call cairo_arc_to() directly. */ double x0, y0; double angle0, angle1, angle2, angled; double d0, d2; double sin_, cos_; double xc, yc, dc; int forward; cairo_get_current_point(mCairo, &x0, &y0); angle0 = atan2 (y0 - y1, x0 - x1); /* angle from (x1,y1) to (x0,y0) */ angle2 = atan2 (y2 - y1, x2 - x1); /* angle from (x1,y1) to (x2,y2) */ angle1 = (angle0 + angle2) / 2; /* angle from (x1,y1) to (xc,yc) */ angled = angle2 - angle0; /* the angle (x0,y0)--(x1,y1)--(x2,y2) */ /* Shall we go forward or backward? */ if (angled > M_PI || (angled < 0 && angled > -M_PI)) { angle1 += M_PI; angled = 2 * M_PI - angled; forward = 1; } else { double tmp; tmp = angle0; angle0 = angle2; angle2 = tmp; forward = 0; } angle0 += M_PI_2; /* angle from (xc,yc) to (x0,y0) */ angle2 -= M_PI_2; /* angle from (xc,yc) to (x2,y2) */ angled /= 2; /* the angle (x0,y0)--(x1,y1)--(xc,yc) */ /* distance from (x1,y1) to (x0,y0) */ d0 = sqrt ((x0-x1)*(x0-x1)+(y0-y1)*(y0-y1)); /* distance from (x2,y2) to (x0,y0) */ d2 = sqrt ((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1)); dc = -1; sin_ = sin(angled); cos_ = cos(angled); if (fabs(cos_) >= 1e-5) { /* the arc may not fit */ /* min distance of end-points from corner */ double min_d = d0 < d2 ? d0 : d2; /* max radius of an arc that fits */ double max_r = min_d * sin_ / cos_; if (radius > max_r) { /* arc with requested radius doesn't fit */ radius = (float) max_r; dc = min_d / cos_; /* distance of (xc,yc) from (x1,y1) */ } } if (dc < 0) dc = radius / sin_; /* distance of (xc,yc) from (x1,y1) */ /* find (cx,cy), the center of the arc */ xc = x1 + sin(angle1) * dc; yc = y1 + cos(angle1) * dc; /* the arc operation draws the line from current point (x0,y0) * to arc center too. */ if (forward) cairo_arc (mCairo, xc, yc, radius, angle0, angle2); else cairo_arc_negative (mCairo, xc, yc, radius, angle2, angle0); cairo_line_to (mCairo, x2, y2); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::Arc(float x, float y, float r, float startAngle, float endAngle, int ccw) { if (!FloatValidate(x,y,r,startAngle,endAngle)) return NS_ERROR_DOM_SYNTAX_ERR; if (ccw) cairo_arc_negative (mCairo, x, y, r, startAngle, endAngle); else cairo_arc (mCairo, x, y, r, startAngle, endAngle); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::Rect(float x, float y, float w, float h) { if (!FloatValidate(x,y,w,h)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_rectangle (mCairo, x, y, w, h); return NS_OK; } // // line caps/joins // NS_IMETHODIMP nsCanvasRenderingContext2D::SetLineWidth(float width) { if (!FloatValidate(width)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_set_line_width(mCairo, width); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::GetLineWidth(float *width) { double d = cairo_get_line_width(mCairo); *width = (float) d; return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::SetLineCap(const nsAString& capstyle) { cairo_line_cap_t cap; if (capstyle.EqualsLiteral("butt")) cap = CAIRO_LINE_CAP_BUTT; else if (capstyle.EqualsLiteral("round")) cap = CAIRO_LINE_CAP_ROUND; else if (capstyle.EqualsLiteral("square")) cap = CAIRO_LINE_CAP_SQUARE; else // XXX ERRMSG we need to report an error to developers here! (bug 329026) return NS_ERROR_NOT_IMPLEMENTED; cairo_set_line_cap (mCairo, cap); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::GetLineCap(nsAString& capstyle) { cairo_line_cap_t cap = cairo_get_line_cap(mCairo); if (cap == CAIRO_LINE_CAP_BUTT) capstyle.AssignLiteral("butt"); else if (cap == CAIRO_LINE_CAP_ROUND) capstyle.AssignLiteral("round"); else if (cap == CAIRO_LINE_CAP_SQUARE) capstyle.AssignLiteral("square"); else return NS_ERROR_FAILURE; return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::SetLineJoin(const nsAString& joinstyle) { cairo_line_join_t j; if (joinstyle.EqualsLiteral("round")) j = CAIRO_LINE_JOIN_ROUND; else if (joinstyle.EqualsLiteral("bevel")) j = CAIRO_LINE_JOIN_BEVEL; else if (joinstyle.EqualsLiteral("miter")) j = CAIRO_LINE_JOIN_MITER; else // XXX ERRMSG we need to report an error to developers here! (bug 329026) return NS_ERROR_NOT_IMPLEMENTED; cairo_set_line_join (mCairo, j); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::GetLineJoin(nsAString& joinstyle) { cairo_line_join_t j = cairo_get_line_join(mCairo); if (j == CAIRO_LINE_JOIN_ROUND) joinstyle.AssignLiteral("round"); else if (j == CAIRO_LINE_JOIN_BEVEL) joinstyle.AssignLiteral("bevel"); else if (j == CAIRO_LINE_JOIN_MITER) joinstyle.AssignLiteral("miter"); else return NS_ERROR_FAILURE; return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::SetMiterLimit(float miter) { if (!FloatValidate(miter)) return NS_ERROR_DOM_SYNTAX_ERR; cairo_set_miter_limit(mCairo, miter); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::GetMiterLimit(float *miter) { double d = cairo_get_miter_limit(mCairo); *miter = (float) d; return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::IsPointInPath(float x, float y, PRBool *retVal) { if (!FloatValidate(x,y)) return NS_ERROR_DOM_SYNTAX_ERR; *retVal = (PRBool) cairo_in_fill(mCairo, x, y); return NS_OK; } // // image // // drawImage(in HTMLImageElement image, in float dx, in float dy); // -- render image from 0,0 at dx,dy top-left coords // drawImage(in HTMLImageElement image, in float dx, in float dy, in float sw, in float sh); // -- render image from 0,0 at dx,dy top-left coords clipping it to sw,sh // drawImage(in HTMLImageElement image, in float sx, in float sy, in float sw, in float sh, in float dx, in float dy, in float dw, in float dh); // -- render the region defined by (sx,sy,sw,wh) in image-local space into the region (dx,dy,dw,dh) on the canvas NS_IMETHODIMP nsCanvasRenderingContext2D::DrawImage() { nsresult rv; nsCOMPtr ncc; rv = nsContentUtils::XPConnect()-> GetCurrentNativeCallContext(getter_AddRefs(ncc)); NS_ENSURE_SUCCESS(rv, rv); if (!ncc) return NS_ERROR_FAILURE; JSContext *ctx = nsnull; rv = ncc->GetJSContext(&ctx); NS_ENSURE_SUCCESS(rv, rv); PRUint32 argc; jsval *argv = nsnull; ncc->GetArgc(&argc); ncc->GetArgvPtr(&argv); // we always need at least an image and a dx,dy if (argc < 3) return NS_ERROR_INVALID_ARG; double sx,sy,sw,sh; double dx,dy,dw,dh; nsCOMPtr imgElt; if (!ConvertJSValToXPCObject(getter_AddRefs(imgElt), NS_GET_IID(nsIDOMElement), ctx, argv[0])) return NS_ERROR_DOM_TYPE_MISMATCH_ERR; cairo_surface_t *imgSurf = nsnull; cairo_matrix_t surfMat; cairo_pattern_t* pat; PRUint8 *imgData = nsnull; PRInt32 imgWidth, imgHeight; nsCOMPtr uri; PRBool forceWriteOnly = PR_FALSE; rv = CairoSurfaceFromElement(imgElt, &imgSurf, &imgData, &imgWidth, &imgHeight, getter_AddRefs(uri), &forceWriteOnly); if (NS_FAILED(rv)) return rv; DoDrawImageSecurityCheck(uri, forceWriteOnly); #define GET_ARG(dest,whicharg) \ do { if (!ConvertJSValToDouble(dest, ctx, whicharg)) { rv = NS_ERROR_INVALID_ARG; goto FAIL; } } while (0) rv = NS_OK; if (argc == 3) { GET_ARG(&dx, argv[1]); GET_ARG(&dy, argv[2]); sx = sy = 0.0; dw = sw = (double) imgWidth; dh = sh = (double) imgHeight; } else if (argc == 5) { GET_ARG(&dx, argv[1]); GET_ARG(&dy, argv[2]); GET_ARG(&dw, argv[3]); GET_ARG(&dh, argv[4]); sx = sy = 0.0; sw = (double) imgWidth; sh = (double) imgHeight; } else if (argc == 9) { GET_ARG(&sx, argv[1]); GET_ARG(&sy, argv[2]); GET_ARG(&sw, argv[3]); GET_ARG(&sh, argv[4]); GET_ARG(&dx, argv[5]); GET_ARG(&dy, argv[6]); GET_ARG(&dw, argv[7]); GET_ARG(&dh, argv[8]); } else { // XXX ERRMSG we need to report an error to developers here! (bug 329026) rv = NS_ERROR_INVALID_ARG; goto FAIL; } #undef GET_ARG if (!FloatValidate(sx,sy,sw,sh)) return NS_ERROR_DOM_SYNTAX_ERR; if (!FloatValidate(dx,dy,dw,dh)) return NS_ERROR_DOM_SYNTAX_ERR; // check args if (sx < 0.0 || sy < 0.0 || sw < 0.0 || sw > (double) imgWidth || sh < 0.0 || sh > (double) imgHeight || dw < 0.0 || dh < 0.0) { // XXX ERRMSG we need to report an error to developers here! (bug 329026) rv = NS_ERROR_DOM_INDEX_SIZE_ERR; goto FAIL; } cairo_matrix_init_translate(&surfMat, sx, sy); cairo_matrix_scale(&surfMat, sw/dw, sh/dh); pat = cairo_pattern_create_for_surface(imgSurf); cairo_pattern_set_matrix(pat, &surfMat); cairo_save(mCairo); cairo_translate(mCairo, dx, dy); cairo_new_path(mCairo); cairo_rectangle(mCairo, 0, 0, dw, dh); cairo_set_source(mCairo, pat); cairo_clip(mCairo); cairo_paint_with_alpha(mCairo, CurrentState().globalAlpha); cairo_restore(mCairo); #if 1 // XXX cairo bug workaround; force a clip update on mCairo. // Otherwise, a pixman clip gets left around somewhere, and pixman // (Render) does source clipping as well -- so we end up // compositing with an incorrect clip. This only seems to affect // fallback cases, which happen when we have CSS scaling going on. // This will blow away the current path, but we already blew it // away in this function earlier. cairo_new_path(mCairo); cairo_rectangle(mCairo, 0, 0, 0, 0); cairo_fill(mCairo); #endif cairo_pattern_destroy(pat); FAIL: if (imgData) nsMemory::Free(imgData); if (imgSurf) cairo_surface_destroy(imgSurf); if (NS_SUCCEEDED(rv)) rv = Redraw(); return rv; } NS_IMETHODIMP nsCanvasRenderingContext2D::SetGlobalCompositeOperation(const nsAString& op) { cairo_operator_t cairo_op; #define CANVAS_OP_TO_CAIRO_OP(cvsop,cairoop) \ if (op.EqualsLiteral(cvsop)) \ cairo_op = CAIRO_OPERATOR_##cairoop; // XXX "darker" isn't really correct CANVAS_OP_TO_CAIRO_OP("clear", CLEAR) else CANVAS_OP_TO_CAIRO_OP("copy", SOURCE) else CANVAS_OP_TO_CAIRO_OP("darker", SATURATE) // XXX else CANVAS_OP_TO_CAIRO_OP("destination-atop", DEST_ATOP) else CANVAS_OP_TO_CAIRO_OP("destination-in", DEST_IN) else CANVAS_OP_TO_CAIRO_OP("destination-out", DEST_OUT) else CANVAS_OP_TO_CAIRO_OP("destination-over", DEST_OVER) else CANVAS_OP_TO_CAIRO_OP("lighter", ADD) else CANVAS_OP_TO_CAIRO_OP("source-atop", ATOP) else CANVAS_OP_TO_CAIRO_OP("source-in", IN) else CANVAS_OP_TO_CAIRO_OP("source-out", OUT) else CANVAS_OP_TO_CAIRO_OP("source-over", OVER) else CANVAS_OP_TO_CAIRO_OP("xor", XOR) // not part of spec, kept here for compat else CANVAS_OP_TO_CAIRO_OP("over", OVER) else return NS_ERROR_NOT_IMPLEMENTED; #undef CANVAS_OP_TO_CAIRO_OP cairo_set_operator(mCairo, cairo_op); return NS_OK; } NS_IMETHODIMP nsCanvasRenderingContext2D::GetGlobalCompositeOperation(nsAString& op) { cairo_operator_t cairo_op = cairo_get_operator(mCairo); #define CANVAS_OP_TO_CAIRO_OP(cvsop,cairoop) \ if (cairo_op == CAIRO_OPERATOR_##cairoop) \ op.AssignLiteral(cvsop); // XXX "darker" isn't really correct CANVAS_OP_TO_CAIRO_OP("clear", CLEAR) else CANVAS_OP_TO_CAIRO_OP("copy", SOURCE) else CANVAS_OP_TO_CAIRO_OP("darker", SATURATE) // XXX else CANVAS_OP_TO_CAIRO_OP("destination-atop", DEST_ATOP) else CANVAS_OP_TO_CAIRO_OP("destination-in", DEST_IN) else CANVAS_OP_TO_CAIRO_OP("destination-out", DEST_OUT) else CANVAS_OP_TO_CAIRO_OP("destination-over", DEST_OVER) else CANVAS_OP_TO_CAIRO_OP("lighter", ADD) else CANVAS_OP_TO_CAIRO_OP("source-atop", ATOP) else CANVAS_OP_TO_CAIRO_OP("source-in", IN) else CANVAS_OP_TO_CAIRO_OP("source-out", OUT) else CANVAS_OP_TO_CAIRO_OP("source-over", OVER) else CANVAS_OP_TO_CAIRO_OP("xor", XOR) else return NS_ERROR_FAILURE; #undef CANVAS_OP_TO_CAIRO_OP return NS_OK; } // // Utils // PRBool nsCanvasRenderingContext2D::ConvertJSValToUint32(PRUint32* aProp, JSContext* aContext, jsval aValue) { uint32 temp; if (::JS_ValueToECMAUint32(aContext, aValue, &temp)) { *aProp = (PRUint32)temp; } else { ::JS_ReportError(aContext, "Parameter must be an integer"); return JS_FALSE; } return JS_TRUE; } PRBool nsCanvasRenderingContext2D::ConvertJSValToDouble(double* aProp, JSContext* aContext, jsval aValue) { jsdouble temp; if (::JS_ValueToNumber(aContext, aValue, &temp)) { *aProp = (jsdouble)temp; } else { ::JS_ReportError(aContext, "Parameter must be a number"); return JS_FALSE; } return JS_TRUE; } PRBool nsCanvasRenderingContext2D::ConvertJSValToXPCObject(nsISupports** aSupports, REFNSIID aIID, JSContext* aContext, jsval aValue) { *aSupports = nsnull; if (JSVAL_IS_NULL(aValue)) { return JS_TRUE; } if (JSVAL_IS_OBJECT(aValue)) { // WrapJS does all the work to recycle an existing wrapper and/or do a QI nsresult rv = nsContentUtils::XPConnect()-> WrapJS(aContext, JSVAL_TO_OBJECT(aValue), aIID, (void**)aSupports); return NS_SUCCEEDED(rv); } return JS_FALSE; } /* cairo ARGB32 surfaces are ARGB stored as a packed 32-bit integer; on little-endian * platforms, they appear as BGRA bytes in the surface data. The color values are also * stored with premultiplied alpha. */ nsresult nsCanvasRenderingContext2D::CairoSurfaceFromElement(nsIDOMElement *imgElt, cairo_surface_t **aCairoSurface, PRUint8 **imgData, PRInt32 *widthOut, PRInt32 *heightOut, nsIURI **uriOut, PRBool *forceWriteOnlyOut) { nsresult rv; nsCOMPtr imgContainer; nsCOMPtr imageLoader = do_QueryInterface(imgElt); if (imageLoader) { nsCOMPtr imgRequest; rv = imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST, getter_AddRefs(imgRequest)); NS_ENSURE_SUCCESS(rv, rv); if (!imgRequest) // XXX ERRMSG we need to report an error to developers here! (bug 329026) return NS_ERROR_NOT_AVAILABLE; nsCOMPtr uri; rv = imageLoader->GetCurrentURI(uriOut); NS_ENSURE_SUCCESS(rv, rv); *forceWriteOnlyOut = PR_FALSE; rv = imgRequest->GetImage(getter_AddRefs(imgContainer)); NS_ENSURE_SUCCESS(rv, rv); } else { // maybe a canvas nsCOMPtr canvas = do_QueryInterface(imgElt); if (canvas) { PRUint32 w, h; rv = canvas->GetSize(&w, &h); NS_ENSURE_SUCCESS(rv, rv); cairo_surface_t *surf = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, w, h); cairo_t *cr = cairo_create (surf); cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR); cairo_paint (cr); cairo_destroy (cr); rv = canvas->RenderContextsToSurface(surf); if (NS_FAILED(rv)) { cairo_surface_destroy (surf); return rv; } *aCairoSurface = surf; *imgData = nsnull; *widthOut = w; *heightOut = h; *uriOut = nsnull; *forceWriteOnlyOut = canvas->IsWriteOnly(); return NS_OK; } else { NS_WARNING("No way to get surface from non-canvas, non-imageloader"); return NS_ERROR_NOT_AVAILABLE; } } if (!imgContainer) return NS_ERROR_NOT_AVAILABLE; nsCOMPtr frame; rv = imgContainer->GetCurrentFrame(getter_AddRefs(frame)); NS_ENSURE_SUCCESS(rv, rv); nsCOMPtr img(do_GetInterface(frame)); PRInt32 imgWidth, imgHeight; rv = frame->GetWidth(&imgWidth); rv |= frame->GetHeight(&imgHeight); if (NS_FAILED(rv)) return NS_ERROR_FAILURE; if (widthOut) *widthOut = imgWidth; if (heightOut) *heightOut = imgHeight; #ifdef MOZ_CAIRO_GFX gfxASurface* gfxsurf = nsnull; rv = img->GetSurface(&gfxsurf); NS_ENSURE_SUCCESS(rv, rv); *aCairoSurface = gfxsurf->CairoSurface(); cairo_surface_reference (*aCairoSurface); *imgData = nsnull; #else // // We now need to create a cairo_surface with the same data as // this image element. // PRUint8 *cairoImgData = (PRUint8 *)nsMemory::Alloc(imgHeight * imgWidth * 4); PRUint8 *outData = cairoImgData; gfx_format format; rv = frame->GetFormat(&format); NS_ENSURE_SUCCESS(rv, rv); rv = frame->LockImageData(); if (img->GetHasAlphaMask()) rv |= frame->LockAlphaData(); if (NS_FAILED(rv)) { nsMemory::Free(cairoImgData); return NS_ERROR_FAILURE; } PRUint8 *inPixBits, *inAlphaBits = nsnull; PRUint32 inPixStride, inAlphaStride = 0; inPixBits = img->GetBits(); inPixStride = img->GetLineStride(); if (img->GetHasAlphaMask()) { inAlphaBits = img->GetAlphaBits(); inAlphaStride = img->GetAlphaLineStride(); } PRBool topToBottom = img->GetIsRowOrderTopToBottom(); PRBool useBGR; // The gtk backend optimizes away the alpha mask of images // with a fully opaque alpha, but doesn't update its format (bug?); // you end up with a RGB_A8 image with GetHasAlphaMask() == false. // We need to treat that case as RGB. if ((format == gfxIFormats::RGB || format == gfxIFormats::BGR) || (!(img->GetHasAlphaMask()) && (format == gfxIFormats::RGB_A8 || format == gfxIFormats::BGR_A8))) { useBGR = (format & 1); #ifdef IS_BIG_ENDIAN useBGR = !useBGR; #endif for (PRUint32 j = 0; j < (PRUint32) imgHeight; j++) { PRUint32 rowIndex; if (topToBottom) rowIndex = j; else rowIndex = imgHeight - j - 1; PRUint8 *inrowrgb = inPixBits + (inPixStride * rowIndex); for (PRUint32 i = 0; i < (PRUint32) imgWidth; i++) { // handle rgb data; no alpha to premultiply #ifdef XP_MACOSX // skip extra OSX byte inrowrgb++; #endif PRUint8 b = *inrowrgb++; PRUint8 g = *inrowrgb++; PRUint8 r = *inrowrgb++; #ifdef IS_BIG_ENDIAN // alpha *outData++ = 0xff; #endif if (useBGR) { *outData++ = b; *outData++ = g; *outData++ = r; } else { *outData++ = r; *outData++ = g; *outData++ = b; } #ifdef IS_LITTLE_ENDIAN // alpha *outData++ = 0xff; #endif } } rv = NS_OK; } else if (format == gfxIFormats::RGB_A1 || format == gfxIFormats::BGR_A1) { useBGR = (format & 1); #ifdef IS_BIG_ENDIAN useBGR = !useBGR; #endif for (PRUint32 j = 0; j < (PRUint32) imgHeight; j++) { PRUint32 rowIndex; if (topToBottom) rowIndex = j; else rowIndex = imgHeight - j - 1; PRUint8 *inrowrgb = inPixBits + (inPixStride * rowIndex); PRUint8 *inrowalpha = inAlphaBits + (inAlphaStride * rowIndex); for (PRUint32 i = 0; i < (PRUint32) imgWidth; i++) { // pull out the bit value into alpha PRInt32 bit = i % 8; PRInt32 byte = i / 8; #ifdef IS_LITTLE_ENDIAN PRUint8 a = (inrowalpha[byte] >> (7-bit)) & 1; #else PRUint8 a = (inrowalpha[byte] >> bit) & 1; #endif #ifdef XP_MACOSX // skip extra X8 byte on OSX inrowrgb++; #endif // handle rgb data; need to multiply the alpha out, // but we short-circuit that here since we know that a // can only be 0 or 1 if (a) { PRUint8 b = *inrowrgb++; PRUint8 g = *inrowrgb++; PRUint8 r = *inrowrgb++; #ifdef IS_BIG_ENDIAN // alpha *outData++ = 0xff; #endif if (useBGR) { *outData++ = b; *outData++ = g; *outData++ = r; } else { *outData++ = r; *outData++ = g; *outData++ = b; } #ifdef IS_LITTLE_ENDIAN // alpha *outData++ = 0xff; #endif } else { // alpha is 0, so we need to write all 0's, // ignoring input color inrowrgb += 3; *outData++ = 0; *outData++ = 0; *outData++ = 0; *outData++ = 0; } } } rv = NS_OK; } else if (format == gfxIFormats::RGB_A8 || format == gfxIFormats::BGR_A8) { useBGR = (format & 1); #ifdef IS_BIG_ENDIAN useBGR = !useBGR; #endif for (PRUint32 j = 0; j < (PRUint32) imgHeight; j++) { PRUint32 rowIndex; if (topToBottom) rowIndex = j; else rowIndex = imgHeight - j - 1; PRUint8 *inrowrgb = inPixBits + (inPixStride * rowIndex); PRUint8 *inrowalpha = inAlphaBits + (inAlphaStride * rowIndex); for (PRUint32 i = 0; i < (PRUint32) imgWidth; i++) { // pull out alpha; we'll need it to premultiply PRUint8 a = *inrowalpha++; // handle rgb data; we need to fully premultiply // with the alpha #ifdef XP_MACOSX // skip extra X8 byte on OSX inrowrgb++; #endif // XXX gcc bug: gcc seems to push "r" into a register // early, and pretends that it's in that register // throughout the 3 macros below. At the end // of the 3rd macro, the correct r value is // calculated but never stored anywhere -- the r variable // has the value of the low byte of register that it // was stuffed into, which has the result of some // intermediate calculation. // I've seen this on gcc 3.4.2 x86 (Fedora Core 3) // and gcc 3.3 PPC (OS X 10.3) //PRUint8 b, g, r; //FAST_DIVIDE_BY_255(b, *inrowrgb++ * a - a / 2); //FAST_DIVIDE_BY_255(g, *inrowrgb++ * a - a / 2); //FAST_DIVIDE_BY_255(r, *inrowrgb++ * a - a / 2); PRUint8 b = (*inrowrgb++ * a - a / 2) / 255; PRUint8 g = (*inrowrgb++ * a - a / 2) / 255; PRUint8 r = (*inrowrgb++ * a - a / 2) / 255; #ifdef IS_BIG_ENDIAN *outData++ = a; #endif if (useBGR) { *outData++ = b; *outData++ = g; *outData++ = r; } else { *outData++ = r; *outData++ = g; *outData++ = b; } #ifdef IS_LITTLE_ENDIAN *outData++ = a; #endif } } rv = NS_OK; } else { rv = NS_ERROR_FAILURE; } if (img->GetHasAlphaMask()) frame->UnlockAlphaData(); frame->UnlockImageData(); if (NS_FAILED(rv)) { nsMemory::Free(cairoImgData); return rv; } cairo_surface_t *imgSurf = cairo_image_surface_create_for_data(cairoImgData, CAIRO_FORMAT_ARGB32, imgWidth, imgHeight, imgWidth*4); *aCairoSurface = imgSurf; *imgData = cairoImgData; #endif return NS_OK; } PRBool CheckSaneImageSize (PRInt32 width, PRInt32 height) { if (width <= 0 || height <= 0) return PR_FALSE; /* check to make sure we don't overflow a 32-bit */ PRInt32 tmp = width * height; if (tmp / height != width) return PR_FALSE; tmp = tmp * 4; if (tmp / 4 != width * height) return PR_FALSE; /* reject over-wide or over-tall images */ const PRInt32 k64KLimit = 0x0000FFFF; if (width > k64KLimit || height > k64KLimit) return PR_FALSE; return PR_TRUE; } /* Check that the rect [x,y,w,h] is a valid subrect of [0,0,realWidth,realHeight] * without overflowing any integers and the like. */ PRBool CheckSaneSubrectSize (PRInt32 x, PRInt32 y, PRInt32 w, PRInt32 h, PRInt32 realWidth, PRInt32 realHeight) { if (w <= 0 || h <= 0 || x < 0 || y < 0) return PR_FALSE; if (x >= realWidth || w > (realWidth - x) || y >= realHeight || h > (realHeight - y)) return PR_FALSE; return PR_TRUE; } static void FlushLayoutForTree(nsIDOMWindow* aWindow) { // Note that because FlushPendingNotifications flushes parents, this // is O(N^2) in docshell tree depth. However, the docshell tree is // usually pretty shallow. nsCOMPtr domDoc; aWindow->GetDocument(getter_AddRefs(domDoc)); nsCOMPtr doc = do_QueryInterface(domDoc); if (doc) { doc->FlushPendingNotifications(Flush_Layout); } nsCOMPtr piWin = do_QueryInterface(aWindow); nsCOMPtr node = do_QueryInterface(piWin->GetDocShell()); if (node) { PRInt32 i = 0, i_end; node->GetChildCount(&i_end); for (; i < i_end; ++i) { nsCOMPtr item; node->GetChildAt(i, getter_AddRefs(item)); nsCOMPtr win = do_GetInterface(item); if (win) { FlushLayoutForTree(win); } } } } NS_IMETHODIMP nsCanvasRenderingContext2D::DrawWindow(nsIDOMWindow* aWindow, PRInt32 aX, PRInt32 aY, PRInt32 aW, PRInt32 aH, const nsAString& aBGColor) { NS_ENSURE_ARG(aWindow != nsnull); // protect against too-large surfaces that will cause allocation // or overflow issues if (!CheckSaneImageSize (aW, aH)) return NS_ERROR_FAILURE; // We can't allow web apps to call this until we fix at least the // following potential security issues: // -- rendering cross-domain IFRAMEs and then extracting the results // -- rendering the user's theme and then extracting the results // -- rendering native anonymous content (e.g., file input paths; // scrollbars should be allowed) if (!nsContentUtils::IsCallerTrustedForRead()) { // not permitted to use DrawWindow // XXX ERRMSG we need to report an error to developers here! (bug 329026) return NS_ERROR_DOM_SECURITY_ERR; } // Flush layout updates FlushLayoutForTree(aWindow); nsCOMPtr presContext; #ifdef MOZILLA_1_8_BRANCH nsCOMPtr sgo = do_QueryInterface(aWindow); if (sgo) { nsIDocShell* docshell = sgo->GetDocShell(); if (docshell) { docshell->GetPresContext(getter_AddRefs(presContext)); } } #else nsCOMPtr win = do_QueryInterface(aWindow); if (win) { nsIDocShell* docshell = win->GetDocShell(); if (docshell) { docshell->GetPresContext(getter_AddRefs(presContext)); } } #endif if (!presContext) return NS_ERROR_FAILURE; #ifdef MOZILLA_1_8_BRANCH // Dig down past the viewport scroll stuff nsIViewManager* vm = presContext->GetViewManager(); nsIView* view; vm->GetRootView(view); NS_ASSERTION(view, "Must have root view!"); #endif nscolor bgColor; nsresult rv = mCSSParser->ParseColorString(PromiseFlatString(aBGColor), nsnull, 0, PR_TRUE, &bgColor); NS_ENSURE_SUCCESS(rv, rv); #ifndef MOZILLA_1_8_BRANCH nsIPresShell* presShell = presContext->PresShell(); #endif #ifdef MOZ_CAIRO_GFX mThebesContext->Save(); //mThebesContext->NewPath(); //mThebesContext->Rectangle(gfxRect(0, 0, aW, aH)); //mThebesContext->Clip(); // XXX vlad says this shouldn't both be COLOR_ALPHA but that it is a workaround for some bug mThebesContext->PushGroup(NS_GET_A(bgColor) == 0xff ? gfxASurface::CONTENT_COLOR_ALPHA : gfxASurface::CONTENT_COLOR_ALPHA); // draw background color if (NS_GET_A(bgColor) > 0) { mThebesContext->SetColor(gfxRGBA(bgColor)); mThebesContext->SetOperator(gfxContext::OPERATOR_SOURCE); mThebesContext->Paint(); } // we want the window to be composited as a single image using // whatever operator was set, so set this to the default OVER; // the original operator will be present when we PopGroup mThebesContext->SetOperator(gfxContext::OPERATOR_OVER); nsIFrame* rootFrame = presShell->FrameManager()->GetRootFrame(); if (rootFrame) { // XXX This shadows the other |r|, above. nsRect r(nsPresContext::CSSPixelsToAppUnits(aX), nsPresContext::CSSPixelsToAppUnits(aY), nsPresContext::CSSPixelsToAppUnits(aW), nsPresContext::CSSPixelsToAppUnits(aH)); nsDisplayListBuilder builder(rootFrame, PR_FALSE, PR_FALSE); nsDisplayList list; nsIScrollableView* scrollingView = nsnull; presContext->GetViewManager()->GetRootScrollableView(&scrollingView); if (scrollingView) { nscoord x, y; scrollingView->GetScrollPosition(x, y); r.MoveBy(-x, -y); builder.SetIgnoreScrollFrame(presShell->GetRootScrollFrame()); } rv = rootFrame->BuildDisplayListForStackingContext(&builder, r, &list); if (NS_SUCCEEDED(rv)) { float t2p = presContext->AppUnitsPerDevPixel(); // Ensure that r.x,r.y gets drawn at (0,0) mThebesContext->Save(); mThebesContext->Translate(gfxPoint(-r.x*t2p, -r.y*t2p)); nsIDeviceContext* devCtx = presContext->DeviceContext(); nsCOMPtr rc; devCtx->CreateRenderingContextInstance(*getter_AddRefs(rc)); rc->Init(devCtx, mThebesContext); nsRegion region(r); list.OptimizeVisibility(&builder, ®ion); list.Paint(&builder, rc, r); // Flush the list so we don't trigger the IsEmpty-on-destruction assertion list.DeleteAll(); mThebesContext->Restore(); } } mThebesContext->PopGroupToSource(); mThebesContext->Paint(); mThebesContext->Restore(); // get rid of the pattern surface ref, just in case cairo_set_source_rgba (mCairo, 1, 1, 1, 1); DirtyAllStyles(); Redraw(); #else nsCOMPtr blackCtx; #ifdef MOZILLA_1_8_BRANCH rv = vm->RenderOffscreen(view, r, PR_FALSE, PR_TRUE, NS_ComposeColors(NS_RGB(0, 0, 0), bgColor), getter_AddRefs(blackCtx)); #else rv = presShell->RenderOffscreen(r, PR_FALSE, PR_TRUE, NS_ComposeColors(NS_RGB(0, 0, 0), bgColor), getter_AddRefs(blackCtx)); #endif NS_ENSURE_SUCCESS(rv, rv); nsIDrawingSurface* blackSurface; blackCtx->GetDrawingSurface(&blackSurface); if (!blackSurface) return NS_ERROR_FAILURE; // Render it! if (NS_GET_A(bgColor) == 0xFF) { // opaque background. Do it the easy way. rv = DrawNativeSurfaces(blackSurface, nsnull, nsSize(aW, aH), blackCtx); blackCtx->DestroyDrawingSurface(blackSurface); return rv; } // transparent background. Do it the hard way. We've drawn onto black, // now draw onto white so we can recover the translucency information. // But we need to compose our given background color onto black/white // to get the real background to use. nsCOMPtr whiteCtx; #ifdef MOZILLA_1_8_BRANCH rv = vm->RenderOffscreen(view, r, PR_FALSE, PR_TRUE, NS_ComposeColors(NS_RGB(255, 255, 255), bgColor), getter_AddRefs(whiteCtx)); #else rv = presShell->RenderOffscreen(r, PR_FALSE, PR_TRUE, NS_ComposeColors(NS_RGB(255, 255, 255), bgColor), getter_AddRefs(whiteCtx)); #endif if (NS_SUCCEEDED(rv)) { nsIDrawingSurface* whiteSurface; whiteCtx->GetDrawingSurface(&whiteSurface); if (!whiteSurface) { rv = NS_ERROR_FAILURE; } else { rv = DrawNativeSurfaces(blackSurface, whiteSurface, nsSize(aW, aH), blackCtx); whiteCtx->DestroyDrawingSurface(whiteSurface); } } blackCtx->DestroyDrawingSurface(blackSurface); #endif return rv; } /** * Given aBits, the number of bits in a color channel, compute a number N * such that for values v with aBits bits, floor((N*v)/256) is close to * v*255.0/(2^aBits - 1) and in particular we need * floor((N*(2^aBits - 1))/256) = 255. * We'll just use a table that gives good results :-). */ static PRUint32 ComputeScaleFactor(PRUint32 aBits) { static PRUint32 table[9] = { 0, 255*256, 85*256, 9330, 17*256, 2110, 1038, 515, 256 }; NS_ASSERTION(aBits <= 8, "more than 8 bits in a color channel not supported"); NS_ASSERTION(((table[aBits]*((1 << aBits) - 1)) >> 8) == 255, "Invalid table entry"); return table[aBits]; } nsresult nsCanvasRenderingContext2D::DrawNativeSurfaces(nsIDrawingSurface* aBlackSurface, nsIDrawingSurface* aWhiteSurface, const nsIntSize& aSurfaceSize, nsIRenderingContext* aBlackContext) { // check if the dimensions are too large; // if they are, we may easily overflow malloc later on if (!CheckSaneImageSize (aSurfaceSize.width, aSurfaceSize.height)) return NS_ERROR_FAILURE; // Acquire alpha values nsAutoArrayPtr alphas; nsresult rv; if (aWhiteSurface) { // There is transparency. Use the blender to recover alphas. nsCOMPtr blender = do_CreateInstance(kBlenderCID, &rv); NS_ENSURE_SUCCESS(rv, rv); nsCOMPtr dc; aBlackContext->GetDeviceContext(*getter_AddRefs(dc)); rv = blender->Init(dc); NS_ENSURE_SUCCESS(rv, rv); rv = blender->GetAlphas(nsRect(0, 0, aSurfaceSize.width, aSurfaceSize.height), aBlackSurface, aWhiteSurface, getter_Transfers(alphas)); NS_ENSURE_SUCCESS(rv, rv); } // We use aBlackSurface to get the image color data PRUint8* data; PRInt32 rowLen, rowSpan; rv = aBlackSurface->Lock(0, 0, aSurfaceSize.width, aSurfaceSize.height, (void**)&data, &rowSpan, &rowLen, NS_LOCK_SURFACE_READ_ONLY); if (NS_FAILED(rv)) return rv; // Get info about native surface layout PRUint32 bytesPerPix = rowLen/aSurfaceSize.width; nsPixelFormat format; #ifndef XP_MACOSX rv = aBlackSurface->GetPixelFormat(&format); if (NS_FAILED(rv)) { aBlackSurface->Unlock(); return rv; } #else // On the mac, GetPixelFormat returns NS_ERROR_NOT_IMPLEMENTED; // we fake the pixel format here. The data that we care about // will be in ABGR format, either 8-8-8 or 5-5-5. if (bytesPerPix == 4) { format.mRedZeroMask = 0xff; format.mGreenZeroMask = 0xff; format.mBlueZeroMask = 0xff; format.mAlphaZeroMask = 0; format.mRedMask = 0x00ff0000; format.mGreenMask = 0x0000ff00; format.mBlueMask = 0x000000ff; format.mAlphaMask = 0; format.mRedCount = 8; format.mGreenCount = 8; format.mBlueCount = 8; format.mAlphaCount = 0; format.mRedShift = 16; format.mGreenShift = 8; format.mBlueShift = 0; format.mAlphaShift = 0; } else if (bytesPerPix == 2) { format.mRedZeroMask = 0x1f; format.mGreenZeroMask = 0x1f; format.mBlueZeroMask = 0x1f; format.mAlphaZeroMask = 0; format.mRedMask = 0x7C00; format.mGreenMask = 0x03E0; format.mBlueMask = 0x001F; format.mAlphaMask = 0; format.mRedCount = 5; format.mGreenCount = 5; format.mBlueCount = 5; format.mAlphaCount = 0; format.mRedShift = 10; format.mGreenShift = 5; format.mBlueShift = 0; format.mAlphaShift = 0; } else { // no clue! aBlackSurface->Unlock(); return NS_ERROR_FAILURE; } #endif // Create a temporary surface to hold the full-size image in cairo // image format. nsAutoArrayPtr tmpBuf(new PRUint8[aSurfaceSize.width*aSurfaceSize.height*4]); if (!tmpBuf) { aBlackSurface->Unlock(); return NS_ERROR_OUT_OF_MEMORY; } cairo_surface_t *tmpSurf = cairo_image_surface_create_for_data(tmpBuf.get(), CAIRO_FORMAT_ARGB32, aSurfaceSize.width, aSurfaceSize.height, aSurfaceSize.width*4); if (!tmpSurf) { aBlackSurface->Unlock(); return NS_ERROR_OUT_OF_MEMORY; } #ifdef IS_BIG_ENDIAN #define BLUE_BYTE 3 #define GREEN_BYTE 2 #define RED_BYTE 1 #define ALPHA_BYTE 0 #else #define BLUE_BYTE 0 #define GREEN_BYTE 1 #define RED_BYTE 2 #define ALPHA_BYTE 3 #endif // Mac surfaces are big endian. #if defined(IS_BIG_ENDIAN) || defined(XP_MACOSX) #define NATIVE_SURFACE_IS_BIG_ENDIAN #endif // OS/2 needs this painted the other way around #ifdef XP_OS2 #define NATIVE_SURFACE_IS_VERTICALLY_FLIPPED #endif // Convert the data PRUint8* dest = tmpBuf; PRInt32 index = 0; PRUint32 RScale = ComputeScaleFactor(format.mRedCount); PRUint32 GScale = ComputeScaleFactor(format.mGreenCount); PRUint32 BScale = ComputeScaleFactor(format.mBlueCount); for (PRInt32 i = 0; i < aSurfaceSize.height; ++i) { #ifdef NATIVE_SURFACE_IS_VERTICALLY_FLIPPED PRUint8* src = data + (aSurfaceSize.height-1 - i)*rowSpan; #else PRUint8* src = data + i*rowSpan; #endif for (PRInt32 j = 0; j < aSurfaceSize.width; ++j) { /* v is the pixel value */ #ifdef NATIVE_SURFACE_IS_BIG_ENDIAN PRUint32 v = (src[0] << 24) | (src[1] << 16) | (src[2] << 8) | src[3]; v >>= (32 - 8*bytesPerPix); #else PRUint32 v = src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24); #endif // Note that because aBlackSurface is the image rendered // onto black, the channel values we get here have // effectively been premultipled by the alpha value. dest[BLUE_BYTE] = (PRUint8)((((v & format.mBlueMask) >> format.mBlueShift)*BScale) >> 8); dest[GREEN_BYTE] = (PRUint8)((((v & format.mGreenMask) >> format.mGreenShift)*GScale) >> 8); dest[RED_BYTE] = (PRUint8)((((v & format.mRedMask) >> format.mRedShift)*RScale) >> 8); dest[ALPHA_BYTE] = alphas ? alphas[index++] : 0xFF; src += bytesPerPix; dest += 4; } } #undef RED_BYTE #undef GREEN_BYTE #undef BLUE_BYTE #undef ALPHA_BYTE cairo_set_source_surface(mCairo, tmpSurf, 0, 0); cairo_paint_with_alpha(mCairo, CurrentState().globalAlpha); cairo_surface_destroy(tmpSurf); aBlackSurface->Unlock(); return Redraw(); } // // device pixel getting/setting // // ImageData getImageData (in float x, in float y, in float width, in float height); NS_IMETHODIMP nsCanvasRenderingContext2D::GetImageData() { if (mCanvasElement->IsWriteOnly() && !nsContentUtils::IsCallerTrustedForRead()) { // not permitted to use DrawWindow // XXX ERRMSG we need to report an error to developers here! (bug 329026) return NS_ERROR_DOM_SECURITY_ERR; } nsCOMPtr ncc; nsresult rv = nsContentUtils::XPConnect()-> GetCurrentNativeCallContext(getter_AddRefs(ncc)); NS_ENSURE_SUCCESS(rv, rv); if (!ncc) return NS_ERROR_FAILURE; JSContext *ctx = nsnull; rv = ncc->GetJSContext(&ctx); NS_ENSURE_SUCCESS(rv, rv); PRUint32 argc; jsval *argv = nsnull; ncc->GetArgc(&argc); ncc->GetArgvPtr(&argv); int32 x, y, w, h; if (!JS_ConvertArguments (ctx, argc, argv, "jjjj", &x, &y, &w, &h)) return NS_ERROR_DOM_SYNTAX_ERR; if (!CheckSaneSubrectSize (x, y, w, h, mWidth, mHeight)) return NS_ERROR_DOM_SYNTAX_ERR; PRUint8 *surfaceData = mImageSurfaceData; nsAutoArrayPtr allocatedSurfaceData; int surfaceDataStride = mWidth * 4; int surfaceDataOffset = (surfaceDataStride * y) + (x * 4); if (!surfaceData) { allocatedSurfaceData = new PRUint8[w * h * 4]; if (!allocatedSurfaceData) return NS_ERROR_OUT_OF_MEMORY; surfaceData = allocatedSurfaceData.get(); cairo_surface_t *tmpsurf = cairo_image_surface_create_for_data (surfaceData, CAIRO_FORMAT_ARGB32, w, h, w*4); cairo_t *tmpcr = cairo_create (tmpsurf); cairo_set_operator (tmpcr, CAIRO_OPERATOR_SOURCE); cairo_set_source_surface (tmpcr, mSurface, -(int)x, -(int)y); cairo_paint (tmpcr); cairo_destroy (tmpcr); cairo_surface_destroy (tmpsurf); surfaceDataStride = w * 4; surfaceDataOffset = 0; } PRUint32 len = w * h * 4; if (len > (((PRUint32)0xfff00000)/sizeof(jsval))) return NS_ERROR_INVALID_ARG; nsAutoArrayPtr jsvector(new jsval[w * h * 4]); if (!jsvector) return NS_ERROR_OUT_OF_MEMORY; jsval *dest = jsvector.get(); PRUint8 *row; for (int j = 0; j < h; j++) { row = surfaceData + surfaceDataOffset + (surfaceDataStride * j); for (int i = 0; i < w; i++) { // XXX Is there some useful swizzle MMX we can use here? // I guess we have to INT_TO_JSVAL still #ifdef IS_LITTLE_ENDIAN PRUint8 b = *row++; PRUint8 g = *row++; PRUint8 r = *row++; PRUint8 a = *row++; #else PRUint8 a = *row++; PRUint8 r = *row++; PRUint8 g = *row++; PRUint8 b = *row++; #endif *dest++ = INT_TO_JSVAL(r); *dest++ = INT_TO_JSVAL(g); *dest++ = INT_TO_JSVAL(b); *dest++ = INT_TO_JSVAL(a); } } JSObject *dataArray = JS_NewArrayObject(ctx, w*h*4, jsvector.get()); if (!dataArray) return NS_ERROR_OUT_OF_MEMORY; nsAutoGCRoot arrayGCRoot(&dataArray, &rv); NS_ENSURE_SUCCESS(rv, rv); JSObject *result = JS_NewObject(ctx, NULL, NULL, NULL); if (!result) return NS_ERROR_OUT_OF_MEMORY; nsAutoGCRoot resultGCRoot(&result, &rv); NS_ENSURE_SUCCESS(rv, rv); if (!JS_DefineProperty(ctx, result, "width", INT_TO_JSVAL(w), NULL, NULL, 0) || !JS_DefineProperty(ctx, result, "height", INT_TO_JSVAL(h), NULL, NULL, 0) || !JS_DefineProperty(ctx, result, "data", OBJECT_TO_JSVAL(dataArray), NULL, NULL, 0)) return NS_ERROR_FAILURE; jsval *retvalPtr; ncc->GetRetValPtr(&retvalPtr); *retvalPtr = OBJECT_TO_JSVAL(result); ncc->SetReturnValueWasSet(PR_TRUE); return NS_OK; } // void putImageData (in ImageData d, in float x, in float y); NS_IMETHODIMP nsCanvasRenderingContext2D::PutImageData() { nsresult rv; nsCOMPtr ncc; rv = nsContentUtils::XPConnect()-> GetCurrentNativeCallContext(getter_AddRefs(ncc)); NS_ENSURE_SUCCESS(rv, rv); if (!ncc) return NS_ERROR_FAILURE; JSContext *ctx = nsnull; rv = ncc->GetJSContext(&ctx); NS_ENSURE_SUCCESS(rv, rv); PRUint32 argc; jsval *argv = nsnull; ncc->GetArgc(&argc); ncc->GetArgvPtr(&argv); JSObject *dataObject; int32 x, y; if (!JS_ConvertArguments (ctx, argc, argv, "ojj", &dataObject, &x, &y)) return NS_ERROR_DOM_SYNTAX_ERR; int32 w, h; JSObject *dataArray; jsval v; if (!JS_GetProperty(ctx, dataObject, "width", &v) || !JS_ValueToInt32(ctx, v, &w)) return NS_ERROR_DOM_SYNTAX_ERR; if (!JS_GetProperty(ctx, dataObject, "height", &v) || !JS_ValueToInt32(ctx, v, &h)) return NS_ERROR_DOM_SYNTAX_ERR; if (!JS_GetProperty(ctx, dataObject, "data", &v) || !JSVAL_IS_OBJECT(v)) return NS_ERROR_DOM_SYNTAX_ERR; dataArray = JSVAL_TO_OBJECT(v); if (!CheckSaneSubrectSize (x, y, w, h, mWidth, mHeight)) return NS_ERROR_DOM_SYNTAX_ERR; jsuint arrayLen; if (!JS_IsArrayObject(ctx, dataArray) || !JS_GetArrayLength(ctx, dataArray, &arrayLen) || arrayLen < (jsuint)(w * h * 4)) return NS_ERROR_DOM_SYNTAX_ERR; nsAutoArrayPtr imageBuffer(new PRUint8[w * h * 4]); cairo_surface_t *imgsurf; PRUint8 *imgPtr = imageBuffer.get(); jsval vr, vg, vb, va; PRUint8 ir, ig, ib, ia; for (int32 j = 0; j < h; j++) { for (int32 i = 0; i < w; i++) { if (!JS_GetElement(ctx, dataArray, (j*w*4) + i*4 + 0, &vr) || !JS_GetElement(ctx, dataArray, (j*w*4) + i*4 + 1, &vg) || !JS_GetElement(ctx, dataArray, (j*w*4) + i*4 + 2, &vb) || !JS_GetElement(ctx, dataArray, (j*w*4) + i*4 + 3, &va)) return NS_ERROR_DOM_SYNTAX_ERR; if (JSVAL_IS_INT(vr)) ir = (PRUint8) JSVAL_TO_INT(vr); else if (JSVAL_IS_DOUBLE(vr)) ir = (PRUint8) (*JSVAL_TO_DOUBLE(vr)); else return NS_ERROR_DOM_SYNTAX_ERR; if (JSVAL_IS_INT(vg)) ig = (PRUint8) JSVAL_TO_INT(vg); else if (JSVAL_IS_DOUBLE(vg)) ig = (PRUint8) (*JSVAL_TO_DOUBLE(vg)); else return NS_ERROR_DOM_SYNTAX_ERR; if (JSVAL_IS_INT(vb)) ib = (PRUint8) JSVAL_TO_INT(vb); else if (JSVAL_IS_DOUBLE(vb)) ib = (PRUint8) (*JSVAL_TO_DOUBLE(vb)); else return NS_ERROR_DOM_SYNTAX_ERR; if (JSVAL_IS_INT(va)) ia = (PRUint8) JSVAL_TO_INT(va); else if (JSVAL_IS_DOUBLE(va)) ia = (PRUint8) (*JSVAL_TO_DOUBLE(va)); else return NS_ERROR_DOM_SYNTAX_ERR; #ifdef IS_LITTLE_ENDIAN *imgPtr++ = ib; *imgPtr++ = ig; *imgPtr++ = ir; *imgPtr++ = ia; #else *imgPtr++ = ia; *imgPtr++ = ir; *imgPtr++ = ig; *imgPtr++ = ib; #endif } } if (mImageSurfaceData) { int stride = mWidth*4; PRUint8 *dest = mImageSurfaceData + stride*y + x*4; for (int32 i = 0; i < y; i++) { memcpy(dest, imgPtr + (w*4)*i, w*4); dest += stride; } } else { imgsurf = cairo_image_surface_create_for_data (imageBuffer.get(), CAIRO_FORMAT_ARGB32, w, h, w*4); cairo_save (mCairo); cairo_identity_matrix (mCairo); cairo_translate (mCairo, x, y); cairo_new_path (mCairo); cairo_rectangle (mCairo, 0, 0, w, h); cairo_set_source_surface (mCairo, imgsurf, 0, 0); cairo_set_operator (mCairo, CAIRO_OPERATOR_SOURCE); cairo_fill (mCairo); cairo_restore (mCairo); cairo_surface_destroy (imgsurf); } return Redraw(); }