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+/*
+ * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef SurfaceOpenVG_h
+#define SurfaceOpenVG_h
+
+#if PLATFORM(EGL)
+#include <egl.h>
+#endif
+
+#include <wtf/Noncopyable.h>
+#include <wtf/Platform.h>
+
+namespace WebCore {
+
+#if PLATFORM(EGL)
+class EGLDisplayOpenVG;
+#endif
+class PainterOpenVG;
+class IntSize;
+
+/**
+ * SurfaceOpenVG provides the functionality of surfaces and contexts that are
+ * underlying the OpenVG implementation. In the vast majority of cases, that
+ * underlying technology is EGL, but OpenVG doesn't depend on EGL per se.
+ * Wrapping surface/context functionality into a separate class avoids lots
+ * of #ifdefs and should make it easy to add different surface/context
+ * implementations than EGL.
+ */
+class SurfaceOpenVG : public Noncopyable {
+public:
+ enum MakeCurrentMode {
+ ApplyPainterStateOnSurfaceSwitch,
+ DontApplyPainterState,
+ };
+
+ static SurfaceOpenVG* currentSurface();
+
+#if PLATFORM(EGL)
+ friend class EGLDisplayOpenVG;
+
+ /**
+ * Create a new EGL pbuffer surface with the specified size and config on
+ * the given display. If config is not specified, the display's default
+ * pbuffer config is used.
+ *
+ * This constructor will trigger an assertion if creation of the surface
+ * fails, unless you pledge to manually process the error code by passing
+ * a non-zero pointer as errorCode parameter. The error code returned by
+ * eglGetError() will be written to that variable.
+ */
+ SurfaceOpenVG(const IntSize& size, const EGLDisplay& display, EGLConfig* config = 0, EGLint* errorCode = 0);
+
+ /**
+ * Create a new EGL window surface with the specified native window handle
+ * and config on the given display. If config is not specified, the
+ * display's default window config is used.
+ */
+ SurfaceOpenVG(EGLNativeWindowType window, const EGLDisplay& display, EGLConfig* config = 0);
+
+ EGLDisplay eglDisplay() const { return m_eglDisplay; }
+ EGLSurface eglSurface() const { return m_eglSurface; }
+ EGLContext eglContext() const { return m_eglContext; }
+#endif
+
+ ~SurfaceOpenVG();
+
+ /**
+ * If a surface is invalid (could not be created), all method calls will
+ * crash horribly.
+ */
+ bool isValid() const;
+
+ int width() const;
+ int height() const;
+
+ SurfaceOpenVG* sharedSurface() const;
+
+ /**
+ * Make the associated GL/EGL context the current one, so that subsequent
+ * OpenVG commands apply to it.
+ */
+ void makeCurrent(MakeCurrentMode mode = ApplyPainterStateOnSurfaceSwitch);
+
+ /**
+ * Make a surface/context combination current that is "compatible"
+ * (i.e. can access its shared resources) to the given one. If no
+ * surface/context is current, the given one is made current.
+ *
+ * This method is meant to avoid context changes if they're not
+ * necessary, particularly tailored for the case where something
+ * compatible to the shared surface is requested while actual painting
+ * happens on another surface.
+ */
+ void makeCompatibleCurrent();
+
+ /**
+ * Empty the OpenVG pipeline and make sure all the performed paint
+ * operations show up on the surface as actual drawn pixels.
+ */
+ void flush();
+
+ void setActivePainter(PainterOpenVG*);
+ PainterOpenVG* activePainter();
+
+private:
+ PainterOpenVG* m_activePainter;
+ static PainterOpenVG* s_currentPainter; // global currently active painter
+
+#if PLATFORM(EGL)
+ SurfaceOpenVG(); // for EGLDisplayOpenVG
+
+ EGLDisplay m_eglDisplay;
+ EGLSurface m_eglSurface;
+ EGLContext m_eglContext;
+#endif
+};
+
+}
+
+#endif