blob: 7e17f2c315b46fb13ea40d5e73fca7ddfa22c39b [file] [log] [blame]
// 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=eb6f861ca1839146d26e40d56c2a001c
REG_FIDDLE(Bitmap_tryAllocPixels_4, 256, 100, false, 0) {
class LargePixelRef : public SkPixelRef {
public:
LargePixelRef(const SkImageInfo& info, char* storage, size_t rowBytes)
: SkPixelRef(info.width(), info.height(), storage, rowBytes) {
}
~LargePixelRef() override {
delete[] (char* ) this->pixels();
}
};
class LargeAllocator : public SkBitmap::Allocator {
public:
bool allocPixelRef(SkBitmap* bitmap) override {
const SkImageInfo& info = bitmap->info();
uint64_t rowBytes = info.minRowBytes64();
uint64_t size = info.height() * rowBytes;
char* addr = new char[size];
if (nullptr == addr) {
return false;
}
sk_sp<SkPixelRef> pr = sk_sp<SkPixelRef>(new LargePixelRef(info, addr, rowBytes));
if (!pr) {
return false;
}
bitmap->setPixelRef(std::move(pr), 0, 0);
return true;
}
};
void draw(SkCanvas* canvas) {
LargeAllocator largeAllocator;
SkBitmap bitmap;
int width = 100; // make this 20000
int height = 100; // and this 100000 to allocate 8 gigs on a 64-bit platform
bitmap.setInfo(SkImageInfo::MakeN32(width, height, kOpaque_SkAlphaType));
if (bitmap.tryAllocPixels(&largeAllocator)) {
bitmap.eraseColor(0xff55aa33);
canvas->drawImage(bitmap.asImage(), 0, 0);
}
}
} // END FIDDLE