// Copyright 2019 Google LLC. // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. #include "tools/fiddle/examples.h" // HASH=4486d0c0b22ad2931db130f42da4c80c REG_FIDDLE(Canvas_accessTopRasterHandle, 256, 256, true, 0) { static void DeleteCallback(void*, void* context) { delete (char*) context; } class CustomAllocator : public SkRasterHandleAllocator { public: bool allocHandle(const SkImageInfo& info, Rec* rec) override { char* context = new char[4]{'s', 'k', 'i', 'a'}; rec->fReleaseProc = DeleteCallback; rec->fReleaseCtx = context; rec->fHandle = context; rec->fPixels = context; rec->fRowBytes = 4; return true; } void updateHandle(Handle handle, const SkMatrix& ctm, const SkIRect& clip_bounds) override { // apply canvas matrix and clip to custom environment } }; void draw(SkCanvas* canvas) { const SkImageInfo info = SkImageInfo::MakeN32Premul(1, 1); std::unique_ptr c2 = SkRasterHandleAllocator::MakeCanvas(std::unique_ptr( new CustomAllocator()), info); char* context = (char*) c2->accessTopRasterHandle(); SkDebugf("context = %.4s\n", context); } } // END FIDDLE