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/*
* Copyright (C) 2012,2023 Igalia S.L.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#pragma once
#if USE(EGL)
#include "IntSize.h"
#include "PlatformDisplay.h"
#include <wtf/Noncopyable.h>
#if !PLATFORM(GTK) && !PLATFORM(WPE)
#include <EGL/eglplatform.h>
typedef EGLNativeWindowType GLNativeWindowType;
#else
typedef uint64_t GLNativeWindowType;
#endif
#if PLATFORM(X11)
#include "XUniqueResource.h"
#endif
#if PLATFORM(WAYLAND)
#include "WlUniquePtr.h"
struct wl_egl_window;
#endif
#if USE(WPE_RENDERER)
struct wpe_renderer_backend_egl_offscreen_target;
#endif
typedef void* GCGLContext;
typedef void* EGLConfig;
typedef void* EGLContext;
typedef void* EGLDisplay;
typedef void* EGLSurface;
// X11 headers define a bunch of macros with common terms, interfering with WebCore and WTF enum values.
// As a workaround, we explicitly undef them here.
#if defined(None)
#undef None
#endif
#if defined(Above)
#undef Above
#endif
#if defined(Below)
#undef Below
#endif
#if defined(Success)
#undef Success
#endif
#if defined(False)
#undef False
#endif
#if defined(True)
#undef True
#endif
#if defined(Bool)
#undef Bool
#endif
#if defined(Always)
#undef Always
#endif
#if defined(Status)
#undef Status
#endif
#if defined(Continue)
#undef Continue
#endif
#if defined(Region)
#undef Region
#endif
namespace WebCore {
class GLContext {
WTF_MAKE_NONCOPYABLE(GLContext); WTF_MAKE_FAST_ALLOCATED;
public:
WEBCORE_EXPORT static std::unique_ptr<GLContext> create(GLNativeWindowType, PlatformDisplay&);
static std::unique_ptr<GLContext> createOffscreen(PlatformDisplay&);
static std::unique_ptr<GLContext> createSharing(PlatformDisplay&);
static GLContext* current();
static bool isExtensionSupported(const char* extensionList, const char* extension);
static const char* errorString(int statusCode);
static const char* lastErrorString();
enum EGLSurfaceType { PbufferSurface, WindowSurface, PixmapSurface, Surfaceless };
GLContext(PlatformDisplay&, EGLContext, EGLSurface, EGLConfig, EGLSurfaceType);
#if PLATFORM(X11)
GLContext(PlatformDisplay&, EGLContext, EGLSurface, EGLConfig, XUniquePixmap&&);
#endif
#if PLATFORM(WAYLAND)
GLContext(PlatformDisplay&, EGLContext, EGLSurface, EGLConfig, WlUniquePtr<struct wl_surface>&&, struct wl_egl_window*);
#endif
#if USE(WPE_RENDERER)
GLContext(PlatformDisplay&, EGLContext, EGLSurface, EGLConfig, struct wpe_renderer_backend_egl_offscreen_target*);
#endif
WEBCORE_EXPORT ~GLContext();
PlatformDisplay& display() const { return m_display; }
unsigned version();
EGLConfig config() const { return m_config; }
WEBCORE_EXPORT bool makeContextCurrent();
bool unmakeContextCurrent();
WEBCORE_EXPORT void swapBuffers();
GCGLContext platformContext() const;
class ScopedGLContext {
WTF_MAKE_NONCOPYABLE(ScopedGLContext);
public:
explicit ScopedGLContext(std::unique_ptr<GLContext>&&);
~ScopedGLContext();
private:
struct {
EGLDisplay display { nullptr };
EGLContext context { nullptr };
EGLSurface readSurface { nullptr };
EGLSurface drawSurface { nullptr };
} m_previous;
std::unique_ptr<GLContext> m_context;
};
class ScopedGLContextCurrent {
WTF_MAKE_NONCOPYABLE(ScopedGLContextCurrent);
public:
explicit ScopedGLContextCurrent(GLContext&);
~ScopedGLContextCurrent();
private:
struct {
GLContext* glContext { nullptr };
EGLDisplay display { nullptr };
EGLContext context { nullptr };
EGLSurface readSurface { nullptr };
EGLSurface drawSurface { nullptr };
} m_previous;
GLContext& m_context;
};
private:
static EGLContext createContextForEGLVersion(PlatformDisplay&, EGLConfig, EGLContext);
static std::unique_ptr<GLContext> createWindowContext(GLNativeWindowType, PlatformDisplay&, EGLContext sharingContext = nullptr);
static std::unique_ptr<GLContext> createPbufferContext(PlatformDisplay&, EGLContext sharingContext = nullptr);
static std::unique_ptr<GLContext> createSurfacelessContext(PlatformDisplay&, EGLContext sharingContext = nullptr);
#if PLATFORM(X11)
static std::unique_ptr<GLContext> createPixmapContext(PlatformDisplay&, EGLContext sharingContext = nullptr);
static EGLSurface createWindowSurfaceX11(EGLDisplay, EGLConfig, GLNativeWindowType);
#endif
#if PLATFORM(WAYLAND)
static std::unique_ptr<GLContext> createWaylandContext(PlatformDisplay&, EGLContext sharingContext = nullptr);
static EGLSurface createWindowSurfaceWayland(EGLDisplay, EGLConfig, GLNativeWindowType);
void destroyWaylandWindow();
#endif
#if USE(WPE_RENDERER)
static std::unique_ptr<GLContext> createWPEContext(PlatformDisplay&, EGLContext sharingContext = nullptr);
static EGLSurface createWindowSurfaceWPE(EGLDisplay, EGLConfig, GLNativeWindowType);
void destroyWPETarget();
#endif
static bool getEGLConfig(PlatformDisplay&, EGLConfig*, EGLSurfaceType, Function<bool(int)>&& = nullptr);
PlatformDisplay& m_display;
unsigned m_version { 0 };
EGLContext m_context { nullptr };
EGLSurface m_surface { nullptr };
EGLConfig m_config { nullptr };
EGLSurfaceType m_type;
#if PLATFORM(X11)
XUniquePixmap m_pixmap;
#endif
#if PLATFORM(WAYLAND)
WlUniquePtr<struct wl_surface> m_wlSurface;
struct wl_egl_window* m_wlWindow { nullptr };
#endif
#if USE(WPE_RENDERER)
struct wpe_renderer_backend_egl_offscreen_target* m_wpeTarget { nullptr };
#endif
};
} // namespace WebCore
#endif // USE(EGL)
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