60   WebPPicture* curr_canvas_;          // Only pointer; we don't own memory.
63   WebPPicture curr_canvas_copy_;      // Possibly modified current canvas.
67   WebPPicture prev_canvas_;           // Previous canvas.
68   WebPPicture prev_canvas_disposed_;  // Previous canvas disposed to background.
196 static void ClearRectangle(WebPPicture* const picture,  in ClearRectangle()
208 static void WebPUtilClearPic(WebPPicture* const picture,  in WebPUtilClearPic()
414 static void MinimizeChangeRectangle(const WebPPicture* const src,  in MinimizeChangeRectangle()
415                                     const WebPPicture* const dst,  in MinimizeChangeRectangle()
512   WebPPicture sub_frame_ll_;     // Sub-frame pic for lossless compression.
516   WebPPicture sub_frame_lossy_;  // Sub-frame pic for lossless compression.
538 static int GetSubRect(const WebPPicture* const prev_canvas,  in GetSubRect()
539                       const WebPPicture* const curr_canvas, int is_key_frame,  in GetSubRect()
543                       WebPPicture* const sub_frame) {  in GetSubRect()
569 static int GetSubRects(const WebPPicture* const prev_canvas,  in GetSubRects()
570                        const WebPPicture* const curr_canvas, int is_key_frame,  in GetSubRects()
595     const WebPPicture* const prev_canvas, const WebPPicture* const curr_canvas,  in WebPAnimEncoderRefineRect()
625                                   WebPPicture* const curr_canvas) {  in DisposeFrameRectangle()
636 static int IsLosslessBlendingPossible(const WebPPicture* const src,  in IsLosslessBlendingPossible()
637                                       const WebPPicture* const dst,  in IsLosslessBlendingPossible()
658 static int IsLossyBlendingPossible(const WebPPicture* const src,  in IsLossyBlendingPossible()
659                                    const WebPPicture* const dst,  in IsLossyBlendingPossible()
686 static int IncreaseTransparency(const WebPPicture* const src,  in IncreaseTransparency()
688                                 WebPPicture* const dst) {  in IncreaseTransparency()
712 static int FlattenSimilarBlocks(const WebPPicture* const src,  in FlattenSimilarBlocks()
714                                 WebPPicture* const dst, float quality) {  in FlattenSimilarBlocks()
767 static int EncodeFrame(const WebPConfig* const config, WebPPicture* const pic,  in EncodeFrame()
787 static WebPEncodingError EncodeCandidate(WebPPicture* const sub_frame,  in EncodeCandidate()
863   WebPPicture* const curr_canvas = &enc->curr_canvas_copy_;  in GenerateCandidates()
864   const WebPPicture* const prev_canvas =  in GenerateCandidates()
1065   const WebPPicture* const curr_canvas = &enc->curr_canvas_copy_;  in SetFrame()
1066   const WebPPicture* const prev_canvas = &enc->prev_canvas_;  in SetFrame()
1128     WebPPicture* const prev_canvas_disposed = &enc->prev_canvas_disposed_;  in SetFrame()
1337 int WebPAnimEncoderAdd(WebPAnimEncoder* enc, WebPPicture* frame, int timestamp,  in WebPAnimEncoderAdd()
1418                                  WebPPicture* const canvas) {  in DecodeFrameOntoCanvas()
1420   WebPPicture sub_image;  in DecodeFrameOntoCanvas()
1447   WebPPicture* const canvas_buf = &enc->curr_canvas_copy_;  in FrameToFullCanvas()