1 // Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 

    17 #include "eglenvironment.h"

    18 #include "egldefs.h"

    19 #include "eglerror.h"

    20 

    21 #include <gdi.h>

    22 

    23 

    24 _LIT(KErrEgl, "EGL error");

    25 //_LIT(KErrDisplayMode, "Unsupported display mode");

    26 

    27 

    28 /** 

    29  * Report any error that occurs.

    30  */

    31 void ProcessEglError()

    32 	{

    33 	User::Panic(KErrEgl, eglGetError());

    34 	}

    35 

    36 CEglEnvironment* CEglEnvironment::NewL(RWindow& aWindow)

    37 	{

    38 	CEglEnvironment* self = new(ELeave) CEglEnvironment(aWindow);

    39 	CleanupStack::PushL(self);

    40 	self->ConstructL();

    41 	CleanupStack::Pop(self);

    42 	return self;

    43 	}

    44 

    45 CEglEnvironment::CEglEnvironment(RWindow& aWindow) : iWindow(aWindow)

    46 	{

    47 	// empty

    48 	}

    49 

    50 CEglEnvironment::~CEglEnvironment()

    51 	{

    52 	// Make sure that this egl status is active

    53     eglMakeCurrent(iDisplay, iSurface, iSurface, iContext);

    54     if (iContext != EGL_NO_CONTEXT)

    55         {

    56         eglDestroyContext(iDisplay,iContext);

    57         }

    58     if (iSurface != EGL_NO_SURFACE)

    59         {

    60         eglDestroySurface(iDisplay,iSurface);

    61         }   

    62     // Call eglMakeCurrent() to ensure the surfaces and contexts are truly destroyed. 

    63     eglMakeCurrent(iDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);

    64     //eglTerminate(iDisplay);

    65     eglReleaseThread();

    66 	}

    67 

    68 void CEglEnvironment::ConstructL()

    69 	{

    70 	// Create display object

    71 	iDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);

    72 	if (iDisplay == EGL_NO_DISPLAY)

    73 		{

    74 		ProcessEglError();

    75 		}

    76 

    77 	// Initialize display object

    78 	if (!eglInitialize(iDisplay, NULL, NULL))

    79 		{

    80 		ProcessEglError();

    81 		}

    82 

    83 	// Query number of configs available

    84 	EGLint numConfigs;

    85 	if (!eglGetConfigs(iDisplay, iConfig, KMaxConfigs, &numConfigs))

    86 		{

    87 		ProcessEglError();

    88 		}

    89 

    90 	const TDisplayMode dispMode = iWindow.DisplayMode();

    91 	const EGLint* attribList = NULL;

    92 	// Select attribs based on current display mode

    93 	switch (dispMode)

    94 		{

    95     case EColor4K:	

    96         attribList = KColor4KAttribList;

    97         break;

    98     case EColor64K:	

    99          attribList = KColor64KAttribList;

   100         break;

   101     case EColor16M:	

   102         attribList = KColor16MAttribList;

   103         break;

   104     case EColor16MA: 

   105         attribList = KColor16MAAttribList;

   106         break;

   107     default:

   108         attribList = KColor16MAAttribList;

   109         //todo: check why this can panic (which displaymode is used)

   110         //User::Panic(KErrDisplayMode, KErrNotSupported);

   111 		}

   112 	// Choose the config to use

   113 	if (!eglChooseConfig(iDisplay, attribList, iConfig, 1, &numConfigs))

   114 		{

   115 		ProcessEglError();

   116 		}

   117 	

   118 	// Create window surface to draw direct to

   119 	iSurface = eglCreateWindowSurface(iDisplay, iConfig[0], &iWindow, NULL);

   120 	if (iSurface == EGL_NO_SURFACE)

   121 		{

   122 		ProcessEglError();

   123 		}

   124 	

   125 	iContext = eglCreateContext(iDisplay, iConfig[0], EGL_NO_CONTEXT, NULL);

   126 	if(!iContext)

   127         {

   128         ProcessEglError();

   129         }

   130 	}

   131 

   132 void CEglEnvironment::DrawToWindow() const

   133     {

   134     if(!eglMakeCurrent(iDisplay, iSurface, iSurface, iContext))

   135         {

   136         ProcessEglError();

   137         }

   138     // Flush colour buffer to the window surface

   139     if(!eglSwapBuffers(iDisplay, iSurface))

   140         {

   141         ProcessEglError();

   142         }

   143     }

   144 

   145 EGLSurface CEglEnvironment::Surface() const

   146 	{

   147 	return iSurface;

   148 	}

   149 

   150 EGLDisplay CEglEnvironment::Display() const

   151 	{

   152 	return iDisplay;

   153 	}