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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "skia/ext/platform_canvas.h"
#include "base/check.h"
#include "base/memory/ptr_util.h"
#include "build/build_config.h"
#include "third_party/skia/include/core/SkTypes.h"
namespace skia {
SkBitmap ReadPixels(SkCanvas* canvas) {
SkBitmap bitmap;
bitmap.allocPixels(canvas->imageInfo());
if (!canvas->readPixels(bitmap, 0, 0))
bitmap.reset();
return bitmap;
}
bool GetWritablePixels(SkCanvas* canvas, SkPixmap* result) {
if (!canvas || !result) {
return false;
}
SkImageInfo info;
size_t row_bytes;
void* pixels = canvas->accessTopLayerPixels(&info, &row_bytes);
if (!pixels) {
result->reset();
return false;
}
result->reset(info, pixels, row_bytes);
return true;
}
std::unique_ptr<SkCanvas> CreatePlatformCanvasWithPixels(
int width,
int height,
bool is_opaque,
uint8_t* data,
size_t bytes_per_row,
OnFailureType failureType) {
SkBitmap bitmap;
bitmap.setInfo(
SkImageInfo::MakeN32(
width, height, is_opaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType),
bytes_per_row);
if (data) {
bitmap.setPixels(data);
} else {
if (!bitmap.tryAllocPixels()) {
CHECK(failureType != CRASH_ON_FAILURE);
return nullptr;
}
// Follow the logic in SkCanvas::createDevice(), initialize the bitmap if
// it is not opaque.
if (!is_opaque)
bitmap.eraseARGB(0, 0, 0, 0);
}
return std::make_unique<SkCanvas>(bitmap);
}
} // namespace skia
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