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- // 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<SkCanvas> c2 =
- SkRasterHandleAllocator::MakeCanvas(std::unique_ptr<CustomAllocator>(
- new CustomAllocator()), info);
- char* context = (char*) c2->accessTopRasterHandle();
- SkDebugf("context = %.4s\n", context);
- }
- } // END FIDDLE
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