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Viewing changes to examples/miral-kiosk/sw_splash.cpp

  • Committer: Christopher James Halse Rogers
  • Date: 2017-09-07 05:58:13 UTC
  • mfrom: (4242 development-branch)
  • mto: (4243.1.1 mir3)
  • mto: This revision was merged to the branch mainline in revision 4244.
  • Revision ID: christopher.halse.rogers@canonical.com-20170907055813-4qsg25nirybc8jj3
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examples/miral-kiosk/sw_splash.cpp
 
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/*
 
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 * Copyright © 2016 Canonical Ltd.
 
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 *
 
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 * This program is free software: you can redistribute it and/or modify it
 
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 * under the terms of the GNU General Public License version 2 or 3 as
 
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 * published by the Free Software Foundation.
 
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 *
 
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 * This program is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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 * GNU General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU General Public License
 
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 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
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 *
 
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 * Authored by: Alan Griffiths <alan@octopull.co.uk>
 
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 */
 
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#include "sw_splash.h"
 
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#include <mir/client/display_config.h>
 
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#include <mir/client/surface.h>
 
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#include <mir/client/window.h>
 
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#include <mir/client/window_spec.h>
 
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#include <mir_toolkit/mir_buffer_stream.h>
 
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#include <chrono>
 
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#include <cstring>
 
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#include <thread>
 
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#include <mutex>
 
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namespace
 
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{
 
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MirPixelFormat find_8888_format(MirConnection* connection)
 
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{
 
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    unsigned int const num_formats = 32;
 
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    MirPixelFormat pixel_formats[num_formats];
 
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    unsigned int valid_formats;
 
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    mir_connection_get_available_surface_formats(connection, pixel_formats, num_formats, &valid_formats);
 
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    for (unsigned int i = 0; i < num_formats; ++i)
 
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    {
 
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        MirPixelFormat cur_pf = pixel_formats[i];
 
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        if (cur_pf == mir_pixel_format_abgr_8888 ||
 
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            cur_pf == mir_pixel_format_argb_8888)
 
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        {
 
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            return cur_pf;
 
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        }
 
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    }
 
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    for (unsigned int i = 0; i < num_formats; ++i)
 
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    {
 
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        MirPixelFormat cur_pf = pixel_formats[i];
 
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        if (cur_pf == mir_pixel_format_xbgr_8888 ||
 
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            cur_pf == mir_pixel_format_xrgb_8888)
 
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        {
 
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            return cur_pf;
 
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        }
 
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    }
 
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    return *pixel_formats;
 
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}
 
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auto create_window(MirConnection* connection, mir::client::Surface const& surface) -> mir::client::Window
 
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{
 
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    int id = 0;
 
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    int width = 0;
 
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    int height = 0;
 
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    mir::client::DisplayConfig{connection}.for_each_output([&](MirOutput const* output)
 
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        {
 
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            if (mir_output_get_connection_state(output) == mir_output_connection_state_connected &&
 
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                mir_output_is_enabled(output))
 
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            {
 
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                id = mir_output_get_id(output);
 
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                MirOutputMode const* mode = mir_output_get_current_mode(output);
 
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                width = mir_output_mode_get_width(mode);
 
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                height = mir_output_mode_get_height(mode);
 
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            }
 
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        });
 
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    return mir::client::WindowSpec::for_normal_window(connection, width, height)
 
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        .set_name("splash")
 
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        .set_fullscreen_on_output(id)
 
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        .add_surface(surface, width, height, 0, 0)
 
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        .create_window();
 
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}
 
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void render_pattern(MirGraphicsRegion *region, uint8_t pattern[])
 
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{
 
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    char *row = region->vaddr;
 
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    for (int j = 0; j < region->height; j++)
 
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    {
 
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        uint32_t *pixel = (uint32_t*)row;
 
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        for (int i = 0; i < region->width; i++)
 
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            memcpy(pixel+i, pattern, sizeof pixel[i]);
 
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        row += region->stride;
 
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    }
 
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}
 
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}
 
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struct SwSplash::Self
 
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{
 
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    std::mutex mutex;
 
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    std::weak_ptr<mir::scene::Session> session;
 
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};
 
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SwSplash::SwSplash() : self{std::make_shared<Self>()} {}
 
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SwSplash::~SwSplash() = default;
 
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void SwSplash::operator()(std::weak_ptr<mir::scene::Session> const& session)
 
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{
 
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    std::lock_guard<decltype(self->mutex)> lock{self->mutex};
 
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    self->session = session;
 
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}
 
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auto SwSplash::session() const -> std::weak_ptr<mir::scene::Session>
 
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{
 
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    std::lock_guard<decltype(self->mutex)> lock{self->mutex};
 
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    return self->session;
 
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}
 
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void SwSplash::operator()(MirConnection* connection)
 
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{
 
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    MirPixelFormat pixel_format = find_8888_format(connection);
 
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    uint8_t pattern[4] = { 0x14, 0x48, 0xDD, 0xFF };
 
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    switch(pixel_format)
 
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    {
 
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    case mir_pixel_format_abgr_8888:
 
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    case mir_pixel_format_xbgr_8888:
 
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        std::swap(pattern[2],pattern[0]);
 
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        break;
 
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    case mir_pixel_format_argb_8888:
 
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    case mir_pixel_format_xrgb_8888:
 
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        break;
 
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    default:
 
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        return;
 
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    };
 
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    mir::client::Surface surface{mir_connection_create_render_surface_sync(connection, 42, 42)};
 
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    MirBufferStream* buffer_stream = mir_render_surface_get_buffer_stream(surface, 42, 42, pixel_format);
 
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    auto const window = create_window(connection, surface);
 
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    MirGraphicsRegion graphics_region;
 
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    auto const time_limit = std::chrono::steady_clock::now() + std::chrono::seconds(2);
 
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    do
 
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    {
 
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        mir_buffer_stream_get_graphics_region(buffer_stream, &graphics_region);
 
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        render_pattern(&graphics_region, pattern);
 
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        mir_buffer_stream_swap_buffers_sync(buffer_stream);
 
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        for (auto& x : pattern)
 
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            x =  3*x/4;
 
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        std::this_thread::sleep_for(std::chrono::milliseconds(200));
 
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    }
 
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    while (std::chrono::steady_clock::now() < time_limit);
 
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}