Merging r5975 through r6036 from trunk to ogl-es branch.

GLES drivers adapted, but only did make compile-tests.


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/branches/ogl-es@6038 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CEGLManager.h

@@ -0,0 +1,119 @@
+// Copyright (C) 2013 Patryk Nadrowski
+// This file is part of the "Irrlicht Engine".
+// For conditions of distribution and use, see copyright notice in Irrlicht.h
+
+#ifndef __C_EGL_MANAGER_H_INCLUDED__
+#define __C_EGL_MANAGER_H_INCLUDED__
+
+#include "IrrCompileConfig.h"
+
+#ifdef _IRR_COMPILE_WITH_EGL_MANAGER_
+
+#include <EGL/egl.h>
+
+#include "SIrrCreationParameters.h"
+#include "SExposedVideoData.h"
+#include "IContextManager.h"
+
+#ifdef _MSC_VER
+#pragma comment(lib, "libEGL.lib")
+#endif
+
+namespace irr
+{
+namespace video
+{
+	// EGL manager.
+	class CEGLManager : public IContextManager
+	{
+	public:
+		//! Constructor.
+		CEGLManager();
+
+		//! Destructor.
+		virtual ~CEGLManager();
+
+		// Initialize EGL.
+		/* This method initialize EGLand create EGL display, anyway surface and context
+		aren't create. */
+		virtual bool initialize(const SIrrlichtCreationParameters& params, const SExposedVideoData& data) _IRR_OVERRIDE_;
+
+		// Terminate EGL.
+		/* Terminate EGL context. This method break both existed surface and context. */
+		virtual void terminate() _IRR_OVERRIDE_;
+
+		// Create EGL surface.
+		/* This method create EGL surface. On some platforms eg. Android, we must
+		recreate surface on each resume, because WindowID may change, so existed
+		surface may not be valid. If EGL context already exist, this method
+		automatically activates it. */
+		virtual bool generateSurface() _IRR_OVERRIDE_;
+
+		// Destroy EGL surface.
+		/* This method destroy EGL. On some platforms eg. Android, we should call
+		this method on each pause, because after resume this surface may not be valid.
+		Hovewer this method doesn'r break EGL context. */
+		virtual void destroySurface() _IRR_OVERRIDE_;
+
+		// Create EGL context.
+		/* This method create and activate EGL context. */
+		virtual bool generateContext() _IRR_OVERRIDE_;
+
+		// Destroy EGL context.
+		/* This method destroy EGL context. */
+		virtual void destroyContext() _IRR_OVERRIDE_;
+
+		virtual const SExposedVideoData& getContext() const _IRR_OVERRIDE_;
+
+		virtual bool activateContext(const SExposedVideoData& videoData, bool restorePrimaryOnZero) _IRR_OVERRIDE_;
+
+		// Swap buffers.
+		virtual bool swapBuffers() _IRR_OVERRIDE_;
+
+	protected:
+		enum EConfigStyle
+		{
+			//! Get first result of eglChooseConfigs and if that fails try again by requesting simpler attributes
+			ECS_EGL_CHOOSE_FIRST_LOWER_EXPECTATIONS,
+
+			//! We select our own best fit and avoid using eglChooseConfigs
+			ECS_IRR_CHOOSE,
+		};
+
+		EGLConfig chooseConfig(EConfigStyle confStyle);
+
+		//! Check how close this config is to the parameters we requested
+		//! returns 0 is perfect, larger values are worse and < 0 is unusable.
+		irr::s32 rateConfig(EGLConfig config, EGLint eglOpenGLBIT, bool log=false);
+
+		// Helper to sort EGLConfig's. (because we got no std::pair....)
+		struct SConfigRating
+		{
+			EGLConfig config;
+			irr::s32 rating;
+			bool operator<(const SConfigRating& other) const
+			{
+				return rating < other.rating;
+			}
+		};
+
+	private:
+		bool testEGLError();
+
+		NativeWindowType EglWindow;
+		EGLDisplay EglDisplay;
+		EGLSurface EglSurface;
+		EGLContext EglContext;
+
+		EGLConfig EglConfig;
+
+		SIrrlichtCreationParameters Params;
+		SExposedVideoData Data;
+
+		EGLint MajorVersion;
+		EGLint MinorVersion;
+	};
+}
+}
+#endif
+#endif