blob: ec7f31e44313e0a8320445b6b8476c1cf05b8eed [file] [log] [blame]
Hal Canary87515122019-03-15 14:22:51 -04001// Copyright 2019 Google LLC.
2// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
Mike Kleinc0bd9f92019-04-23 12:05:21 -05003#include "tools/fiddle/examples.h"
Hal Canary87515122019-03-15 14:22:51 -04004// HASH=eb6f861ca1839146d26e40d56c2a001c
Hal Canarya7181e7c2019-03-18 16:06:34 -04005REG_FIDDLE(Bitmap_tryAllocPixels_4, 256, 100, false, 0) {
Hal Canary87515122019-03-15 14:22:51 -04006class LargePixelRef : public SkPixelRef {
7public:
8 LargePixelRef(const SkImageInfo& info, char* storage, size_t rowBytes)
9 : SkPixelRef(info.width(), info.height(), storage, rowBytes) {
10 }
11 ~LargePixelRef() override {
12 delete[] (char* ) this->pixels();
13 }
14};
15class LargeAllocator : public SkBitmap::Allocator {
16public:
17 bool allocPixelRef(SkBitmap* bitmap) override {
18 const SkImageInfo& info = bitmap->info();
19 uint64_t rowBytes = info.minRowBytes64();
20 uint64_t size = info.height() * rowBytes;
21 char* addr = new char[size];
22 if (nullptr == addr) {
23 return false;
24 }
25 sk_sp<SkPixelRef> pr = sk_sp<SkPixelRef>(new LargePixelRef(info, addr, rowBytes));
26 if (!pr) {
27 return false;
28 }
29 bitmap->setPixelRef(std::move(pr), 0, 0);
30 return true;
31 }
32};
33
34void draw(SkCanvas* canvas) {
35 LargeAllocator largeAllocator;
36 SkBitmap bitmap;
37 int width = 100; // make this 20000
38 int height = 100; // and this 100000 to allocate 8 gigs on a 64-bit platform
39 bitmap.setInfo(SkImageInfo::MakeN32(width, height, kOpaque_SkAlphaType));
40 if (bitmap.tryAllocPixels(&largeAllocator)) {
41 bitmap.eraseColor(0xff55aa33);
42 canvas->drawBitmap(bitmap, 0, 0);
43 }
44}
45} // END FIDDLE