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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <fractional-scale-v1-client-protocol.h>
#include "base/at_exit.h"
#include "base/command_line.h"
#include "base/logging.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 "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkSurface.h"
#include "ui/gfx/geometry/skia_conversions.h"
namespace exo {
namespace wayland {
namespace clients {
class FractionalScaleClient : public ClientBase {
public:
FractionalScaleClient() = default;
void Run(const ClientBase::InitParams& params);
void SetFractionalScale(double scale);
private:
void Paint();
bool needs_repaint_ = true;
double fractional_scale_ = 0.0;
int32_t drm_format_ = 0;
int32_t bo_usage_ = 0;
bool use_release_fences_ = false;
};
namespace {
void HandlePreferredScale(void* data,
struct wp_fractional_scale_v1* info,
uint32_t wire_scale) {
FractionalScaleClient* client = static_cast<FractionalScaleClient*>(data);
client->SetFractionalScale(wire_scale / 120.0);
}
} // namespace
void FractionalScaleClient::Run(const InitParams& params) {
if (!ClientBase::Init(params)) {
return;
}
drm_format_ = params.drm_format;
bo_usage_ = params.bo_usage;
use_release_fences_ = params.use_release_fences;
wp_fractional_scale_v1_listener fractional_scale_listener = {
HandlePreferredScale};
auto* fractional_scale_obj =
wp_fractional_scale_manager_v1_get_fractional_scale(
globals_.wp_fractional_scale_manager_v1.get(), surface_.get());
wp_fractional_scale_v1_add_listener(fractional_scale_obj,
&fractional_scale_listener, this);
auto* viewport =
wp_viewporter_get_viewport(globals_.wp_viewporter.get(), surface_.get());
wp_viewport_set_destination(viewport, surface_size_.width(),
surface_size_.height());
// Wait for initial fractional scale
while (wl_display_dispatch(display_.get()) != -1) {
if (fractional_scale_ > 0.0) {
break;
}
}
do {
if (needs_repaint_) {
Paint();
}
} while (wl_display_dispatch(display_.get()) != -1);
}
void FractionalScaleClient::SetFractionalScale(double scale) {
fractional_scale_ = scale;
needs_repaint_ = true;
}
void FractionalScaleClient::Paint() {
const gfx::Size buffer_size = {
static_cast<int>(round(size_.width() * fractional_scale_)),
static_cast<int>(round(size_.height() * fractional_scale_))};
auto buffer = CreateBuffer(buffer_size, drm_format_, bo_usage_,
/*add_buffer_listener=*/!use_release_fences_);
if (!buffer) {
return;
}
SkCanvas* canvas = buffer->sk_surface->getCanvas();
canvas->clear(SK_ColorWHITE);
gfx::Point point = {0, 0};
const gfx::Size square_size = {
static_cast<int>(round(buffer_size.width() / 8.0)),
static_cast<int>(round(buffer_size.height() / 8.0))};
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
const SkRect rect = gfx::RectToSkRect(gfx::Rect{point, square_size});
SkColor color;
if ((i + j) % 2) {
color = SK_ColorRED;
} else {
color = SK_ColorBLUE;
}
SkPaint paint;
paint.setColor(color);
canvas->drawRect(rect, paint);
point.SetPoint(point.x() + square_size.width(), point.y());
}
point.SetPoint(0, point.y() + square_size.height());
}
wl_surface_damage(surface_.get(), 0, 0, surface_size_.width(),
surface_size_.height());
wl_surface_attach(surface_.get(), buffer->buffer.get(), 0, 0);
wl_surface_commit(surface_.get());
wl_display_flush(display_.get());
needs_repaint_ = false;
}
} // 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;
}
if (params.use_drm) {
LOG(ERROR) << "Unsupported parameter --use-drm";
return 1;
}
if (params.scale != 1) {
LOG(ERROR) << "Unsupported parameter --scale";
return 1;
}
base::SingleThreadTaskExecutor main_task_executor(base::MessagePumpType::UI);
exo::wayland::clients::FractionalScaleClient client;
client.Run(params);
return 0;
}
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