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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/screen_capturer_fake.h"
#include "base/logging.h"
#include "base/time/time.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
namespace remoting {
// ScreenCapturerFake generates a white picture of size kWidth x kHeight
// with a rectangle of size kBoxWidth x kBoxHeight. The rectangle moves kSpeed
// pixels per frame along both axes, and bounces off the sides of the screen.
static const int kWidth = ScreenCapturerFake::kWidth;
static const int kHeight = ScreenCapturerFake::kHeight;
static const int kBoxWidth = 140;
static const int kBoxHeight = 140;
static const int kSpeed = 20;
COMPILE_ASSERT(kBoxWidth < kWidth && kBoxHeight < kHeight, bad_box_size);
COMPILE_ASSERT((kBoxWidth % kSpeed == 0) && (kWidth % kSpeed == 0) &&
(kBoxHeight % kSpeed == 0) && (kHeight % kSpeed == 0),
sizes_must_be_multiple_of_kSpeed);
ScreenCapturerFake::ScreenCapturerFake()
: callback_(NULL),
mouse_shape_observer_(NULL),
bytes_per_row_(0),
box_pos_x_(0),
box_pos_y_(0),
box_speed_x_(kSpeed),
box_speed_y_(kSpeed) {
ScreenConfigurationChanged();
}
ScreenCapturerFake::~ScreenCapturerFake() {
}
void ScreenCapturerFake::Start(Callback* callback) {
DCHECK(!callback_);
DCHECK(callback);
callback_ = callback;
}
void ScreenCapturerFake::Capture(const webrtc::DesktopRegion& region) {
base::Time capture_start_time = base::Time::Now();
queue_.MoveToNextFrame();
if (!queue_.current_frame()) {
int buffer_size = size_.height() * bytes_per_row_;
webrtc::SharedMemory* shared_memory =
callback_->CreateSharedMemory(buffer_size);
scoped_ptr<webrtc::DesktopFrame> frame;
webrtc::DesktopSize frame_size(size_.width(), size_.height());
if (shared_memory) {
frame.reset(new webrtc::SharedMemoryDesktopFrame(
frame_size, bytes_per_row_, shared_memory));
} else {
frame.reset(new webrtc::BasicDesktopFrame(frame_size));
}
queue_.ReplaceCurrentFrame(frame.release());
}
DCHECK(queue_.current_frame());
GenerateImage();
queue_.current_frame()->mutable_updated_region()->SetRect(
webrtc::DesktopRect::MakeSize(size_));
queue_.current_frame()->set_capture_time_ms(
(base::Time::Now() - capture_start_time).InMillisecondsRoundedUp());
callback_->OnCaptureCompleted(queue_.current_frame()->Share());
}
void ScreenCapturerFake::SetMouseShapeObserver(
MouseShapeObserver* mouse_shape_observer) {
DCHECK(!mouse_shape_observer_);
DCHECK(mouse_shape_observer);
mouse_shape_observer_ = mouse_shape_observer;
}
void ScreenCapturerFake::GenerateImage() {
webrtc::DesktopFrame* frame = queue_.current_frame();
const int kBytesPerPixel = webrtc::DesktopFrame::kBytesPerPixel;
memset(frame->data(), 0xff,
size_.width() * size_.height() * kBytesPerPixel);
uint8* row = frame->data() +
(box_pos_y_ * size_.width() + box_pos_x_) * kBytesPerPixel;
box_pos_x_ += box_speed_x_;
if (box_pos_x_ + kBoxWidth >= size_.width() || box_pos_x_ == 0)
box_speed_x_ = -box_speed_x_;
box_pos_y_ += box_speed_y_;
if (box_pos_y_ + kBoxHeight >= size_.height() || box_pos_y_ == 0)
box_speed_y_ = -box_speed_y_;
// Draw rectangle with the following colors in its corners:
// cyan....yellow
// ..............
// blue.......red
for (int y = 0; y < kBoxHeight; ++y) {
for (int x = 0; x < kBoxWidth; ++x) {
int r = x * 255 / kBoxWidth;
int g = y * 255 / kBoxHeight;
int b = 255 - (x * 255 / kBoxWidth);
row[x * kBytesPerPixel] = r;
row[x * kBytesPerPixel + 1] = g;
row[x * kBytesPerPixel + 2] = b;
row[x * kBytesPerPixel + 3] = 0xff;
}
row += bytes_per_row_;
}
}
void ScreenCapturerFake::ScreenConfigurationChanged() {
size_.set(kWidth, kHeight);
queue_.Reset();
bytes_per_row_ = size_.width() * webrtc::DesktopFrame::kBytesPerPixel;
}
} // namespace remoting
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