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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#include "base/at_exit.h"
#include "base/command_line.h"
#include "base/message_loop/message_pump_type.h"
#include "base/task/single_thread_task_executor.h"
#include "components/exo/wayland/clients/client_base.h"
#include "components/exo/wayland/clients/client_helper.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkSurface.h"
#include "third_party/skia/include/gpu/ganesh/GrDirectContext.h"
#include "ui/gl/gl_bindings.h"
namespace exo {
namespace wayland {
namespace clients {
namespace {
void FrameCallback(void* data, wl_callback* callback, uint32_t time) {
bool* callback_pending = static_cast<bool*>(data);
*callback_pending = false;
}
} // namespace
// This demo testes subsurface features of exo.
// For the first 200 frames: we animate parent surface, child_surface and
// child_surface's position.
// For 200-400 frames: we animate parent surface and child_surface's position.
// For 400-600 frames: we only animate child_surface's position.
// After 600 frames: we still animate child_surface's position, but don't call
// commit on parent surface. So the window will stop updating.
class SubSurfaceClient : public ClientBase {
public:
SubSurfaceClient() = default;
SubSurfaceClient(const SubSurfaceClient&) = delete;
SubSurfaceClient& operator=(const SubSurfaceClient&) = delete;
~SubSurfaceClient() override = default;
void Run(const ClientBase::InitParams& params);
};
void SubSurfaceClient::Run(const ClientBase::InitParams& params) {
if (!ClientBase::Init(params))
return;
std::unique_ptr<wl_surface> child_surface(static_cast<wl_surface*>(
wl_compositor_create_surface(globals_.compositor.get())));
std::unique_ptr<wl_subsurface> subsurface(
static_cast<wl_subsurface*>(wl_subcompositor_get_subsurface(
globals_.subcompositor.get(), child_surface.get(), surface_.get())));
if (!child_surface || !subsurface) {
LOG(ERROR) << "Can't create subsurface";
return;
}
constexpr int32_t kSubsurfaceWidth = 128;
constexpr int32_t kSubsurfaceHeight = 128;
auto subbuffer =
CreateBuffer(gfx::Size(kSubsurfaceWidth, kSubsurfaceHeight),
params.drm_format, params.bo_usage,
/*add_buffer_listener=*/!params.use_release_fences);
if (!subbuffer) {
LOG(ERROR) << "Failed to create subbuffer";
return;
}
bool callback_pending = false;
std::unique_ptr<wl_callback> frame_callback;
wl_callback_listener frame_listener = {FrameCallback};
size_t frame_count = 0;
do {
if (callback_pending && frame_count < 600)
continue;
// Only generate frames to child surface for the first 200 frames.
if (frame_count < 200) {
SkScalar half_width = SkScalarHalf(kSubsurfaceWidth);
SkScalar half_height = SkScalarHalf(kSubsurfaceHeight);
SkIRect rect = SkIRect::MakeXYWH(-SkScalarHalf(half_width),
-SkScalarHalf(half_height), half_width,
half_height);
// Rotation speed (degrees/frame).
const double kRotationSpeed = 5.;
SkScalar rotation = frame_count * kRotationSpeed;
SkCanvas* canvas = subbuffer->sk_surface->getCanvas();
canvas->save();
canvas->clear(SK_ColorBLACK);
SkPaint paint;
paint.setColor(SkColorSetA(SK_ColorYELLOW, 0xA0));
canvas->translate(half_width, half_height);
canvas->rotate(rotation);
canvas->drawIRect(rect, paint);
canvas->restore();
if (gr_context_) {
gr_context_->flushAndSubmit();
glFinish();
}
wl_surface_damage(child_surface.get(), 0, 0, kSubsurfaceWidth,
kSubsurfaceHeight);
wl_surface_attach(child_surface.get(), subbuffer->buffer.get(), 0, 0);
wl_surface_commit(child_surface.get());
}
// Only generate frames to parent surface for the first 400 frames.
if (frame_count < 400) {
Buffer* buffer = buffers_.front().get();
SkCanvas* canvas = buffer->sk_surface->getCanvas();
static const SkColor kColors[] = {SK_ColorRED, SK_ColorBLACK};
canvas->clear(kColors[frame_count % std::size(kColors)]);
if (gr_context_) {
gr_context_->flushAndSubmit();
glFinish();
}
wl_surface_set_buffer_scale(surface_.get(), scale_);
wl_surface_set_buffer_transform(surface_.get(), transform_);
wl_surface_damage(surface_.get(), 0, 0, surface_size_.width(),
surface_size_.height());
wl_surface_attach(surface_.get(), buffer->buffer.get(), 0, 0);
callback_pending = true;
frame_callback.reset(wl_surface_frame(surface_.get()));
wl_callback_add_listener(frame_callback.get(), &frame_listener,
&callback_pending);
}
// Always animate subsurface position.
wl_subsurface_set_position(subsurface.get(), frame_count % 50,
frame_count % 50);
// Only commit changes for the first 600 frames.
if (frame_count < 600)
wl_surface_commit(surface_.get());
wl_display_flush(display_.get());
++frame_count;
} while (wl_display_dispatch(display_.get()) != -1);
}
} // namespace clients
} // namespace wayland
} // namespace exo
int main(int argc, char* argv[]) {
base::AtExitManager exit_manager;
base::CommandLine::Init(argc, argv);
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
exo::wayland::clients::ClientBase::InitParams params;
if (!params.FromCommandLine(*command_line))
return 1;
base::SingleThreadTaskExecutor main_task_executor(base::MessagePumpType::UI);
exo::wayland::clients::SubSurfaceClient client;
client.Run(params);
return 1;
}
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