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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/os_feedback/os_feedback_screenshot_manager.h"
#include <utility>
#include "ash/shell.h"
#include "base/barrier_callback.h"
#include "base/functional/bind.h"
#include "base/logging.h"
#include "base/memory/ref_counted.h"
#include "base/memory/ref_counted_memory.h"
#include "base/memory/singleton.h"
#include "chrome/browser/android/compose_bitmaps_helper.h"
#include "third_party/skia/include/core/SkImageInfo.h"
#include "third_party/skia/include/core/SkPixmap.h"
#include "ui/aura/window.h"
#include "ui/gfx/image/image.h"
#include "ui/snapshot/snapshot.h"
namespace ash {
namespace {
// Helper method to collect all png_data before calling OnAllScreenshotsTaken
// function to handle them.
void OnOneScreenshotTaken(
base::OnceCallback<void(scoped_refptr<base::RefCountedMemory>)>
barrier_callback,
scoped_refptr<base::RefCountedMemory> png_data) {
std::move(barrier_callback).Run(png_data);
}
// Helper method to combine all the screenshots in the screenshot_data_set in
// horizontal direction.
scoped_refptr<base::RefCountedMemory> GetCombinedBitmap(
const std::vector<scoped_refptr<base::RefCountedMemory>>&
screenshot_data_set) {
// If we only have one displays, skip combining.
if (screenshot_data_set.size() == 1) {
return screenshot_data_set[0];
}
int32_t total_width = 0;
int32_t total_height = 0;
std::vector<SkBitmap> bitmaps;
for (const auto& data : screenshot_data_set) {
auto image = gfx::Image::CreateFrom1xPNGBytes(data);
auto bitmap = std::move(*image.ToSkBitmap());
total_width += bitmap.width();
total_height = std::max(total_height, bitmap.height());
bitmaps.push_back(bitmap);
}
SkImageInfo image_info = bitmaps[0]
.info()
.makeWH(total_width, total_height)
.makeAlphaType(kPremul_SkAlphaType);
SkBitmap combined_bitmap;
combined_bitmap.setInfo(image_info);
combined_bitmap.allocPixels();
int32_t next_start_pixel = 0;
for (auto& bitmap : bitmaps) {
combined_bitmap.writePixels(bitmap.pixmap(), next_start_pixel, 0);
next_start_pixel += bitmap.dimensions().width();
}
return gfx::Image::CreateFrom1xBitmap(std::move(combined_bitmap))
.As1xPNGBytes();
}
} // namespace
OsFeedbackScreenshotManager::OsFeedbackScreenshotManager() = default;
OsFeedbackScreenshotManager::~OsFeedbackScreenshotManager() = default;
// Static.
OsFeedbackScreenshotManager* OsFeedbackScreenshotManager::GetInstance() {
return base::Singleton<OsFeedbackScreenshotManager>::get();
}
OsFeedbackScreenshotManager* OsFeedbackScreenshotManager::GetIfExists() {
return base::Singleton<OsFeedbackScreenshotManager>::GetIfExists();
}
void OsFeedbackScreenshotManager::TakeScreenshot(ScreenshotCallback callback) {
// Skip taking if one has been taken already. Although the feedback tool only
// allows one instance, the user could request it multiple times while one
// instance is still running.
if (screenshot_png_data_ != nullptr) {
std::move(callback).Run(false);
return;
}
aura::Window::Windows all_windows;
// In unit tests, shell is not created.
if (ash::Shell::HasInstance()) {
all_windows = ash::Shell::GetAllRootWindows();
}
if (all_windows.size() == 0) {
std::move(callback).Run(false);
return;
}
auto barrier_callback =
base::BarrierCallback<scoped_refptr<base::RefCountedMemory>>(
all_windows.size(),
base::BindOnce(&OsFeedbackScreenshotManager::OnAllScreenshotsTaken,
weak_ptr_factory_.GetWeakPtr(), std::move(callback)));
for (aura::Window* root_window : all_windows) {
gfx::Rect rect = root_window->bounds();
ui::GrabWindowSnapshotAsPNG(
root_window, rect,
base::BindOnce(OnOneScreenshotTaken, barrier_callback));
}
}
scoped_refptr<base::RefCountedMemory>
OsFeedbackScreenshotManager::GetScreenshotData() {
return screenshot_png_data_;
}
void OsFeedbackScreenshotManager::OnAllScreenshotsTaken(
ScreenshotCallback callback,
std::vector<scoped_refptr<base::RefCountedMemory>> all_data) {
std::vector<scoped_refptr<base::RefCountedMemory>> screenshot_data_set;
for (scoped_refptr<base::RefCountedMemory> data : all_data) {
if (data && data.get()) {
screenshot_data_set.push_back(data);
}
}
if (screenshot_data_set.size() > 0) {
screenshot_png_data_ = GetCombinedBitmap(screenshot_data_set);
std::move(callback).Run(true);
} else {
LOG(ERROR) << "failed to take screenshot.";
std::move(callback).Run(false);
}
}
void OsFeedbackScreenshotManager::DeleteScreenshotData() {
// TODO(xiangdongkong): See whether we can delete this.
screenshot_png_data_ = nullptr;
}
} // namespace ash
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