1cb93a386Sopenharmony_ci// Copyright 2019 Google LLC. 2cb93a386Sopenharmony_ci// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. 3cb93a386Sopenharmony_ci#include <memory> 4cb93a386Sopenharmony_ci 5cb93a386Sopenharmony_ci#include "tools/fiddle/examples.h" 6cb93a386Sopenharmony_ci// HASH=4486d0c0b22ad2931db130f42da4c80c 7cb93a386Sopenharmony_ciREG_FIDDLE(Canvas_accessTopRasterHandle, 256, 256, true, 0) { 8cb93a386Sopenharmony_cistatic void DeleteCallback(void*, void* context) { 9cb93a386Sopenharmony_ci delete (char*) context; 10cb93a386Sopenharmony_ci} 11cb93a386Sopenharmony_ciclass CustomAllocator : public SkRasterHandleAllocator { 12cb93a386Sopenharmony_cipublic: 13cb93a386Sopenharmony_ci bool allocHandle(const SkImageInfo& info, Rec* rec) override { 14cb93a386Sopenharmony_ci char* context = new char[4]{'s', 'k', 'i', 'a'}; 15cb93a386Sopenharmony_ci rec->fReleaseProc = DeleteCallback; 16cb93a386Sopenharmony_ci rec->fReleaseCtx = context; 17cb93a386Sopenharmony_ci rec->fHandle = context; 18cb93a386Sopenharmony_ci rec->fPixels = context; 19cb93a386Sopenharmony_ci rec->fRowBytes = 4; 20cb93a386Sopenharmony_ci return true; 21cb93a386Sopenharmony_ci } 22cb93a386Sopenharmony_ci void updateHandle(Handle handle, const SkMatrix& ctm, const SkIRect& clip_bounds) override { 23cb93a386Sopenharmony_ci // apply canvas matrix and clip to custom environment 24cb93a386Sopenharmony_ci } 25cb93a386Sopenharmony_ci}; 26cb93a386Sopenharmony_ci 27cb93a386Sopenharmony_civoid draw(SkCanvas* canvas) { 28cb93a386Sopenharmony_ci const SkImageInfo info = SkImageInfo::MakeN32Premul(1, 1); 29cb93a386Sopenharmony_ci std::unique_ptr<SkCanvas> c2 = 30cb93a386Sopenharmony_ci SkRasterHandleAllocator::MakeCanvas(std::make_unique<CustomAllocator>(), info); 31cb93a386Sopenharmony_ci char* context = (char*) c2->accessTopRasterHandle(); 32cb93a386Sopenharmony_ci SkDebugf("context = %.4s\n", context); 33cb93a386Sopenharmony_ci} 34cb93a386Sopenharmony_ci} // END FIDDLE 35