Index: third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h |
diff --git a/third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h b/third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h |
index d6169b58aeebc72104ed8a14f883ad644a14f644..448749834dc3de612cadf1e6d9245b192a01cd42 100644 |
--- a/third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h |
+++ b/third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h |
@@ -301,6 +301,12 @@ class PLATFORM_EXPORT ImageDecoder { |
// returns that number. |
virtual size_t decodeFrameCount() { return 1; } |
+ // Called to initialize the frame buffer with the given index, based on the |
+ // provided and previous frame's characteristics. Returns true on success. On |
+ // failure, this will mark the image as failed. Before calling this method, |
+ // the caller must verify that the frame exists. |
+ bool initFrameBuffer(size_t); |
+ |
// Performs any additional setup of the requested frame after it has been |
// initially created, e.g. setting a duration or disposal method. |
virtual void initializeNewFrame(size_t) {} |
@@ -341,6 +347,14 @@ class PLATFORM_EXPORT ImageDecoder { |
return total_size > ((1 << 29) - 1); |
} |
+ // This methods gets called at the end of initFrameBuffer. Subclasses can do |
+ // format specific initialization, for e.g. alpha settings, here. |
+ virtual void onInitFrameBuffer(size_t){}; |
+ |
+ // Called by initFrameBuffer to determine if it can take the bitmap of the |
+ // previous frame. This condition is different for GIF and WEBP. |
+ virtual bool canReusePreviousFrameBuffer(size_t) const { return false; } |
scroggo_chromium
2016/11/14 16:44:12
I think this will only get called by WEBP, GIF, an
joostouwerling
2016/11/14 16:54:13
I picked false for the last reason you mentioned.
|
+ |
IntSize m_size; |
bool m_sizeAvailable = false; |
bool m_isAllDataReceived = false; |