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/*
* Copyright © Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 or 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "sw_splash.h"
#include "wayland_app.h"
#include "wayland_surface.h"
#include "wayland_shm.h"
#include <wayland-client.h>
#include <chrono>
#include <cstring>
#include <thread>
#include <mutex>
using namespace mir::geometry;
namespace
{
struct DrawContext
{
struct wl_display* display;
std::unique_ptr<WaylandShm> shm;
std::unique_ptr<WaylandSurface> surface;
uint8_t pattern[4] = { 0x14, 0x48, 0xDD, 0xFF };
};
void draw_new_stuff(DrawContext* ctx)
{
Size const size{ctx->surface->configured_size()};
auto const width = size.width.as_int();
auto const height = size.height.as_int();
auto const stride = width * 4;
auto const buffer = ctx->shm->get_buffer(size, Stride{stride});
char* row = static_cast<decltype(row)>(buffer->data());
for (int j = 0; j < height; j++)
{
uint32_t* pixel = (uint32_t*)row;
for (int i = 0; i < width; i++)
memcpy(pixel + i, ctx->pattern, sizeof pixel[i]);
row += stride;
}
ctx->surface->add_frame_callback([ctx]()
{
draw_new_stuff(ctx);
});
ctx->surface->attach_buffer(buffer->use(), 1);
ctx->surface->commit();
}
}
struct SwSplash::Self : SplashSession
{
Self()
{
}
bool show_splash=true;
DrawContext ctx;
std::mutex mutable mutex;
std::weak_ptr<mir::scene::Session> session_;
std::shared_ptr<mir::scene::Session> session() const override
{
std::lock_guard lock{mutex};
return session_.lock();
}
void operator()(struct wl_display* display);
};
SwSplash::SwSplash() : self{std::make_shared<Self>()} {}
SwSplash::~SwSplash() = default;
void SwSplash::enable (bool show_splash_opt){
self->show_splash = show_splash_opt;
}
void SwSplash::operator()(std::weak_ptr<mir::scene::Session> const& session)
{
std::lock_guard lock{self->mutex};
self->session_ = session;
}
SwSplash::operator std::shared_ptr<SplashSession>() const
{
return self;
}
void SwSplash::Self::operator()(struct wl_display* display)
{
if (!show_splash)
return;
WaylandApp app{display};
ctx.display = display;
ctx.shm = std::make_unique<WaylandShm>(app.shm());
ctx.surface = std::make_unique<WaylandSurface>(&app);
ctx.surface->set_fullscreen(nullptr);
ctx.surface->commit();
app.roundtrip();
WaylandCallback::create(wl_display_sync(display), [this]()
{
draw_new_stuff(&ctx);
});
auto const time_limit = std::chrono::steady_clock::now() + std::chrono::seconds(2);
//this is the splash screen
do
{
wl_display_dispatch(display);
for (auto& x : ctx.pattern)
{
x = 3*x/4;
}
std::this_thread::sleep_for(std::chrono::milliseconds(200));
}
while (std::chrono::steady_clock::now() < time_limit);
app.roundtrip();
ctx.surface.reset();
ctx.shm.reset();
}
void SwSplash::operator()(struct wl_display* display)
{
(*self)(display);
}
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