AcceleratedSurfaceWPE.cpp

/*
 * Copyright (C) 2017 Igalia S.L.
 *
 * Redistribution and use in source and binary forms, with or without
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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#include "config.h"
#include "AcceleratedSurfaceWPE.h"

#include "WebPage.h"
#include <WebCore/PlatformDisplayWPE.h>
#include <wpe/renderer-backend-egl.h>

using namespace WebCore;

namespace WebKit {

std::unique_ptr<AcceleratedSurfaceWPE> AcceleratedSurfaceWPE::create(WebPage& webPage, Client& client)
{
    return std::unique_ptr<AcceleratedSurfaceWPE>(new AcceleratedSurfaceWPE(webPage, client));
}

AcceleratedSurfaceWPE::AcceleratedSurfaceWPE(WebPage& webPage, Client& client)
    : AcceleratedSurface(webPage, client)
{
    m_compositingManager.establishConnection(webPage);
}

AcceleratedSurfaceWPE::~AcceleratedSurfaceWPE()
{
    ASSERT(!m_backend);
}

void AcceleratedSurfaceWPE::initialize()
{
    m_backend = wpe_renderer_backend_egl_target_create(m_compositingManager.releaseConnectionFd());
    static struct wpe_renderer_backend_egl_target_client s_client = {
        // frame_complete
        [](void* data)
        {
            auto& surface = *reinterpret_cast<AcceleratedSurfaceWPE*>(data);
            surface.m_client.frameComplete();
        },
    };
    wpe_renderer_backend_egl_target_set_client(m_backend, &s_client, this);
    wpe_renderer_backend_egl_target_initialize(m_backend, downcast<PlatformDisplayWPE>(PlatformDisplay::sharedDisplay()).backend(),
        std::max(0, m_size.width()), std::max(0, m_size.height()));
}

void AcceleratedSurfaceWPE::finalize()
{
    wpe_renderer_backend_egl_target_destroy(m_backend);
    m_backend = nullptr;
}

uint64_t AcceleratedSurfaceWPE::window() const
{
    ASSERT(m_backend);
    // EGLNativeWindowType changes depending on the EGL implementation: reinterpret_cast works
    // for pointers (only if they are 64-bit wide and not for other cases), and static_cast for
    // numeric types (and when needed they get extended to 64-bit) but not for pointers. Using
    // a plain C cast expression in this one instance works in all cases.
    static_assert(sizeof(EGLNativeWindowType) <= sizeof(uint64_t), "EGLNativeWindowType must not be longer than 64 bits.");
    return (uint64_t) wpe_renderer_backend_egl_target_get_native_window(m_backend);
}

uint64_t AcceleratedSurfaceWPE::surfaceID() const
{
    return m_webPage.pageID();
}

bool AcceleratedSurfaceWPE::resize(const IntSize& size)
{
    ASSERT(m_backend);
    if (!AcceleratedSurface::resize(size))
        return false;

    wpe_renderer_backend_egl_target_resize(m_backend, std::max(0, m_size.width()), std::max(0, m_size.height()));

    return true;
}

void AcceleratedSurfaceWPE::willRenderFrame()
{
    ASSERT(m_backend);
    wpe_renderer_backend_egl_target_frame_will_render(m_backend);
}

void AcceleratedSurfaceWPE::didRenderFrame()
{
    ASSERT(m_backend);
    wpe_renderer_backend_egl_target_frame_rendered(m_backend);
}

} // namespace WebKit