From f8b9aba8214b9c1f6ccd5852879d6a1cbb16a304 Mon Sep 17 00:00:00 2001
From: janekptacijarabaci <janekptacijarabaci@seznam.cz>
Date: Sun, 15 Apr 2018 06:51:24 +0200
Subject: moebius#106: SVG - CanvasImageSource - allow using an SVGImageElement
 as a CanvasImageSource

---
 dom/canvas/CanvasRenderingContext2D.cpp | 24 ++++++++++++++++++------
 dom/canvas/CanvasRenderingContext2D.h   |  4 ++--
 2 files changed, 20 insertions(+), 8 deletions(-)

(limited to 'dom/canvas')

diff --git a/dom/canvas/CanvasRenderingContext2D.cpp b/dom/canvas/CanvasRenderingContext2D.cpp
index 15df2b337..a38c38293 100644
--- a/dom/canvas/CanvasRenderingContext2D.cpp
+++ b/dom/canvas/CanvasRenderingContext2D.cpp
@@ -105,6 +105,7 @@
 #include "mozilla/dom/CanvasPath.h"
 #include "mozilla/dom/HTMLImageElement.h"
 #include "mozilla/dom/HTMLVideoElement.h"
+#include "mozilla/dom/SVGImageElement.h"
 #include "mozilla/dom/SVGMatrix.h"
 #include "mozilla/dom/TextMetrics.h"
 #include "mozilla/dom/SVGMatrix.h"
@@ -2477,10 +2478,10 @@ CanvasRenderingContext2D::CreatePattern(const CanvasImageSource& aSource,
     return nullptr;
   }
 
-  Element* htmlElement;
+  Element* element;
   if (aSource.IsHTMLCanvasElement()) {
     HTMLCanvasElement* canvas = &aSource.GetAsHTMLCanvasElement();
-    htmlElement = canvas;
+    element = canvas;
 
     nsIntSize size = canvas->GetSize();
     if (size.width == 0 || size.height == 0) {
@@ -2505,7 +2506,7 @@ CanvasRenderingContext2D::CreatePattern(const CanvasImageSource& aSource,
       }
 
       RefPtr<CanvasPattern> pat =
-        new CanvasPattern(this, srcSurf, repeatMode, htmlElement->NodePrincipal(), canvas->IsWriteOnly(), false);
+        new CanvasPattern(this, srcSurf, repeatMode, element->NodePrincipal(), canvas->IsWriteOnly(), false);
 
       return pat.forget();
     }
@@ -2516,11 +2517,19 @@ CanvasRenderingContext2D::CreatePattern(const CanvasImageSource& aSource,
       return nullptr;
     }
 
-    htmlElement = img;
+    element = img;
+  } else if (aSource.IsSVGImageElement()) {
+    SVGImageElement* img = &aSource.GetAsSVGImageElement();
+    if (img->IntrinsicState().HasState(NS_EVENT_STATE_BROKEN)) {
+      aError.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+      return nullptr;
+    }
+
+    element = img;
   } else if (aSource.IsHTMLVideoElement()) {
     auto& video = aSource.GetAsHTMLVideoElement();
     video.MarkAsContentSource(mozilla::dom::HTMLVideoElement::CallerAPI::CREATE_PATTERN);
-    htmlElement = &video;
+    element = &video;
   } else {
     // Special case for ImageBitmap
     ImageBitmap& imgBitmap = aSource.GetAsImageBitmap();
@@ -2559,7 +2568,7 @@ CanvasRenderingContext2D::CreatePattern(const CanvasImageSource& aSource,
   // The canvas spec says that createPattern should use the first frame
   // of animated images
   nsLayoutUtils::SurfaceFromElementResult res =
-    nsLayoutUtils::SurfaceFromElement(htmlElement,
+    nsLayoutUtils::SurfaceFromElement(element,
       nsLayoutUtils::SFE_WANT_FIRST_FRAME, mTarget);
 
   if (!res.GetSourceSurface()) {
@@ -4949,6 +4958,9 @@ CanvasRenderingContext2D::DrawImage(const CanvasImageSource& aImage,
     if (aImage.IsHTMLImageElement()) {
       HTMLImageElement* img = &aImage.GetAsHTMLImageElement();
       element = img;
+    } else if (aImage.IsSVGImageElement()) {
+      SVGImageElement* img = &aImage.GetAsSVGImageElement();
+      element = img;
     } else {
       HTMLVideoElement* video = &aImage.GetAsHTMLVideoElement();
       video->MarkAsContentSource(mozilla::dom::HTMLVideoElement::CallerAPI::DRAW_IMAGE);
diff --git a/dom/canvas/CanvasRenderingContext2D.h b/dom/canvas/CanvasRenderingContext2D.h
index c3ee3bdcb..d5dff8f3b 100644
--- a/dom/canvas/CanvasRenderingContext2D.h
+++ b/dom/canvas/CanvasRenderingContext2D.h
@@ -38,8 +38,8 @@ class SourceSurface;
 } // namespace gl
 
 namespace dom {
-class HTMLImageElementOrHTMLCanvasElementOrHTMLVideoElementOrImageBitmap;
-typedef HTMLImageElementOrHTMLCanvasElementOrHTMLVideoElementOrImageBitmap CanvasImageSource;
+class HTMLImageElementOrSVGImageElementOrHTMLCanvasElementOrHTMLVideoElementOrImageBitmap;
+typedef HTMLImageElementOrSVGImageElementOrHTMLCanvasElementOrHTMLVideoElementOrImageBitmap CanvasImageSource;
 class ImageData;
 class StringOrCanvasGradientOrCanvasPattern;
 class OwningStringOrCanvasGradientOrCanvasPattern;
-- 
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