--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/guestrendering/guestegl/src/eglsgimage.cpp	Wed Sep 08 15:45:18 2010 +0100
@@ -0,0 +1,369 @@
+// Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// Implementation of SgImage functions exported through eglGetProcAddress
+
+
+#include "eglapi.h"
+
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// CEgLImage
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+#ifdef FAISALMEMON_S4_SGIMAGE
+CEglImage::CEglImage() : iSgHandle(), iDisplay(0), iSgImageInfo(), iPbufferHandle(0), iVgHandle(VG_INVALID_HANDLE),
+		iCreateCount(1), iOpenCount(0), iIsDestroyed(EFalse)
+	{
+	EGL_TRACE("CEglImage::CEglImage(0x%x)", this);
+	}
+
+CEglImage::~CEglImage()
+	{
+	EGL_TRACE("CEglImage::~CEglImage(0x%x) iCreateCount=%d, iOpenCount=%d", this, iCreateCount, iOpenCount);
+	EGLPANIC_ASSERT_DEBUG( (iCreateCount == 0) && (iOpenCount == 0), EEglPanicEglImageRefCountNonZero);
+	iSgHandle.Close();
+	}
+
+// initialise member data
+void CEglImage::Create(TSgDrawableId aSgImageId, EGLDisplay aDisplay, TSgImageInfo& aSgImageInfo, TInt aPbufferHandle,
+		VGHandle aVgHandle)
+	{
+	EGL_TRACE("CEglImage::Create iCreateCount=%d, iOpenCount=%d", iCreateCount, iOpenCount);
+	EGLPANIC_ASSERT_DEBUG(iCreateCount == 0, EEglPanicEglImageRefCountNonZero);
+	EGLPANIC_ASSERT_DEBUG(!iIsDestroyed, EEglPanicEglImageIsDestroyed);
+	EGLPANIC_ASSERT_DEBUG(aSgImageId != KSgNullDrawableId, EEglPanicTemp);
+	++iCreateCount;
+	TInt err = iSgHandle.Open(aSgImageId);
+	EGLPANIC_ASSERT_DEBUG(err == KErrNone, EEglPanicTemp);
+	iDisplay = aDisplay;
+	iSgImageInfo = aSgImageInfo;
+	iVgHandle = aVgHandle;
+	iPbufferHandle = aPbufferHandle;
+	}
+
+// Duplicate open
+void CEglImage::Duplicate()
+	{
+	EGL_TRACE("CEglImage::Duplicate iCreateCount=%d, iOpenCount=%d", iCreateCount, iOpenCount);
+	EGLPANIC_ASSERT_DEBUG( (iCreateCount > 0) && !iIsDestroyed, EEglPanicEglImageIsDestroyed);
+	++iCreateCount;
+	}
+
+
+// If successful increments reference count & returns ETrue. (Ultimtately called from e.g. vgCreateEGLImageTargetKHR.) 
+TBool CEglImage::OpenForVgImage(TSize& aSize, VGHandle& aVgHandle, TUint64& aSgImageId)
+	{
+	EGL_TRACE("CEglImage::OpenForVgImage iCreateCount=%d, iOpenCount=%d", iCreateCount, iOpenCount);
+	if ( (iCreateCount > 0) && (iSgImageInfo.iUsage & ESgUsageBitOpenVgImage) )
+		{
+		++iOpenCount;
+		aSize = iSgImageInfo.iSizeInPixels;
+		aVgHandle = iVgHandle;
+		aSgImageId = iSgHandle.Id().iId;
+		return ETrue;
+		}
+	return EFalse;
+	}
+
+// If successful decrements reference count & returns ETrue. (Ultimtately called from e.g. vgDestroyImage.) 
+TBool CEglImage::Close()
+	{
+	EGL_TRACE("CEglImage::Close iCreateCount=%d, iOpenCount=%d", iCreateCount, iOpenCount);
+	if (iOpenCount > 0)
+		{
+		--iOpenCount;
+		if ( RefCount() == 0 )
+			{
+			iSgHandle.Close();
+			}
+		return ETrue;
+		}
+	return EFalse;
+	}
+
+// If not already destroyed: mark EglImage as destroyed, dec reference count, return ETrue. (Called from eglDestroyImageKHR.) 
+TBool CEglImage::Destroy()
+	{
+	EGL_TRACE("CEglImage::Destroy iCreateCount=%d, iOpenCount=%d", iCreateCount, iOpenCount);
+	if (!iIsDestroyed)
+		{
+		--iCreateCount;
+		if (iCreateCount == 0)
+			{
+			iIsDestroyed = ETrue;
+			if ( RefCount() == 0 )
+				{
+				iSgHandle.Close();
+				}
+			return ETrue;
+			}
+		}
+	return EFalse;
+	}
+
+// Reference Count: count of unbalanced Create() plus Open() calls.
+TInt CEglImage::RefCount()
+	{
+	return iOpenCount + iCreateCount;
+	}
+
+TSgDrawableId CEglImage::SgImageId() const
+	{
+	return iSgHandle.Id();
+	}
+
+EGLDisplay CEglImage::Display() const
+	{
+	return iDisplay;
+	}
+
+TBool CEglImage::IsDestroyed() const
+	{
+	return iIsDestroyed;
+	}
+#else
+void CEglImage::Duplicate() {}
+TBool CEglImage::OpenForVgImage(TSize& aSize, VGHandle& aVgHandle, TUint64& aSgImageId) {}
+TBool CEglImage::Close() {}
+TBool CEglImage::Destroy() {}
+TBool CEglImage::IsDestroyed() const {}
+TInt CEglImage::RefCount() {}
+EGLDisplay CEglImage::Display() const {}
+#endif
+
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// SgImage stuff in CGuestEGL
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+
+EGLint CGuestEGL::ValidateEglImageTarget(EGLDisplay aDisplay, EGLContext aContext, EGLenum aTarget,
+		EGLClientBuffer aBuffer, const EGLint *aAttribList, TSymbianPixmapTypeId aTargetPixmapType)
+	{
+	if (!IsDisplayInitialized(aDisplay)) // ToDo just check display is valid, don't care if it is initialised
+		{
+		return EGL_BAD_DISPLAY;
+		}
+	if ( (aContext != EGL_NO_CONTEXT) || (aTarget != EGL_NATIVE_PIXMAP_KHR) )
+		{
+		return EGL_BAD_PARAMETER;
+		}
+	aTargetPixmapType = EglInternalFunction_GetNativePixmapType((EGLNativePixmapType) aBuffer);
+	if ( (aTargetPixmapType != EPixmapTypeSgImage) || !EglInternalFunction_IsValidNativePixmap((EGLNativePixmapType) aBuffer, aTargetPixmapType) )
+		{
+		return EGL_BAD_PARAMETER;
+		}
+	// ToDo check Attrib List is valid
+	return EGL_SUCCESS;
+	}
+
+#ifdef FAISALMEMON_S4_SGIMAGE
+EGLImageKHR CGuestEGL::DuplicateEglImageIfItExists(EGLDisplay aDisplay, TSgDrawableId aSgId)
+	{ // ToDo something smarter with a Hash Map ?
+	TInt imageCount = iEglImageArray.Count();
+	for (TInt index = 0; index < imageCount; ++index)
+		{
+		CEglImage* imagePtr = iEglImageArray[index];
+		if ( !imagePtr->IsDestroyed() && (imagePtr->SgImageId() == aSgId)  && (imagePtr->Display() == aDisplay) )
+			{
+			imagePtr->Duplicate();
+			EGL_TRACE("CGuestEGL::DuplicateEglImageIfItExists SgImage already used for eglImage=0x%x", imagePtr);
+			return (EGLImageKHR)imagePtr;
+			}
+		}
+	return EGL_NO_IMAGE_KHR;
+	}
+
+
+
+EGLImageKHR CGuestEGL::CreateNewEglImage(TEglThreadState& aThreadState, EGLDisplay aDisplay, TSgDrawableId aSgId, TSgImageInfo aSgImageInfo)
+	{
+	RHeap* oldHeap = CVghwUtils::SwitchToVghwHeap();
+	CEglImage* newImage = new CEglImage();
+	if (newImage)
+		{
+		if (KErrNone != iEglImageArray.InsertInAddressOrder(newImage))
+			{
+			delete newImage;
+			newImage = NULL;
+			}
+		}
+	CVghwUtils::SwitchFromVghwHeap(oldHeap);
+	if (newImage == NULL)
+		{
+		EGL_TRACE("CGuestEGL::CreateNewEglImage 1.a error creating new CEglImage");
+		return EGL_NO_IMAGE_KHR;
+		}
+
+	// success ...
+	EGL_TRACE("CGuestEGL::CreateNewEglImage 1.b Created new eglImage=0x%x", newImage);
+	TInt pbufferHandle;
+	TInt vgImageHandle;
+	TUint64 sgHandles;
+    EGLint hostResult = CVghwUtils::EglGetSgHandles(aSgId.iId, &sgHandles);
+    pbufferHandle = (TInt)(sgHandles&0xFFFFFFFF);
+    vgImageHandle = (TInt)((sgHandles>>32)&0xFFFFFFFF);
+	EGL_TRACE("CGuestEGL::CreateNewEglImage 2. CVghwUtils::EglGetSgHandles result=%d, pbufferHandle=0x%x, vgImageHandle=0x%x", 
+			hostResult, pbufferHandle, vgImageHandle);
+	EGLPANIC_ASSERT(KErrNone == hostResult, EEglPanicTemp);
+
+	newImage->Create(aSgId, aDisplay, aSgImageInfo, pbufferHandle, vgImageHandle);
+
+	return (EGLImageKHR)newImage;
+	}
+
+#endif // FAISALMEMON_S4_SGIMAGE
+
+
+/*
+ * eglCreateImageKHR supports Khronos EGL extension #8, "KHR_image_base"
+ *
+ * Supported values for target parameter:
+ * EGL_NATIVE_PIXMAP_KHR for Khronos EGL extension #9, "KHR_image_pixmap"
+ */
+EGLImageKHR CGuestEGL::eglCreateImageKHR(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLContext aContext, EGLenum aTarget,
+		EGLClientBuffer aBuffer, const EGLint *aAttribList)
+	{
+	// ToDo lock aDisplay
+	EGLImageKHR eglImage = EGL_NO_IMAGE_KHR;
+	iEglImageLock.Wait();
+	TSymbianPixmapTypeId targetPixmapType = EPixmapTypeNone;
+	EGLint error = ValidateEglImageTarget(aDisplay, aContext, aTarget, aBuffer, aAttribList, targetPixmapType);
+	EGL_TRACE("CGuestEGL::eglCreateImageKHR 1. validate error=%d, targetPixmapType=%d", error, targetPixmapType);
+
+	if (error == EGL_SUCCESS)
+		{
+		switch(targetPixmapType)
+			{
+			case EPixmapTypeSgImage:
+				{
+#ifdef FAISALMEMON_S4_SGIMAGE
+				// try to lock SgImage from disappearing by opening a temporary handle
+				RSgImage* sgImagePtr = reinterpret_cast<RSgImage*>(aBuffer);
+				TSgDrawableId sgId = sgImagePtr->Id();
+				RSgDrawable sgHandle;
+				TSgImageInfo imgInfo;
+				// ToDo ensure SgImage has correct suitable usage bits 
+				if ( (sgId != KSgNullDrawableId) && (KErrNone == sgHandle.Open(sgId)) && (KErrNone == sgImagePtr->GetInfo(imgInfo)) )
+					{
+					EGL_TRACE("CGuestEGL::eglCreateImageKHR 2. SgImage PixelFormat=%d; size=%d,%d; Usage=0x%x",
+							imgInfo.iPixelFormat, imgInfo.iSizeInPixels.iWidth, imgInfo.iSizeInPixels.iHeight, imgInfo.iUsage);
+
+					// find / create CEglImage
+					if (error == EGL_SUCCESS)
+						{ // SgImage may already be used for an EglImage
+						eglImage = DuplicateEglImageIfItExists(aDisplay, sgId);
+						if (eglImage == EGL_NO_IMAGE_KHR)
+							{ // first use
+							eglImage = CreateNewEglImage(aThreadState, aDisplay, sgId, imgInfo);
+							if (eglImage == EGL_NO_IMAGE_KHR)
+								{
+								error = EGL_BAD_ALLOC;
+								}
+							}
+						}
+					}
+				else
+					{
+					error = EGL_BAD_PARAMETER;
+					}
+				sgHandle.Close();
+#endif
+				}
+				break;
+
+			case EPixmapTypeFbsBitmap:
+			case EPixmapTypeNone:
+			default: // pixmap type not supported by this API
+				error = EGL_BAD_PARAMETER;
+				break;
+			}
+		}
+
+	iEglImageLock.Signal();
+	aThreadState.SetEglError(error);
+
+	// we either failed or should have a non-NULL handle
+	EGLPANIC_ASSERT_DEBUG( (error != EGL_SUCCESS) || (eglImage != EGL_NO_IMAGE_KHR), EEglPanicTemp);
+
+	return eglImage;
+	}
+
+/*
+ * eglDestroyImageKHR supports Khronos EGL extension #8, "KHR_image_base"
+ */
+EGLBoolean CGuestEGL::eglDestroyImageKHR(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLImageKHR aImage)
+	{
+	// ToDo lock aDisplay
+	EGLBoolean result = EGL_FALSE;
+	iEglImageLock.Wait();
+	TInt index = iEglImageArray.FindInAddressOrder((CEglImage*)aImage);
+	if (index >= 0)
+		{
+		CEglImage* eglImage = iEglImageArray[index];
+		if ( (eglImage->Display() && aDisplay) && eglImage->Destroy())
+			{
+			result = EGL_TRUE;
+			if (eglImage->RefCount() == 0)
+				{
+				iEglImageArray.Remove(index);
+				delete eglImage;
+				}
+			}
+		}
+	iEglImageLock.Signal();
+
+	// set EGL Error appropriately
+	aThreadState.SetEglError( result ? EGL_SUCCESS : EGL_BAD_PARAMETER);
+	return result;
+	}
+
+
+TBool CGuestEGL::EglImageOpenForVgImage(EGLImageKHR aImage, TSize& aSize, VGHandle& aVgHandle, TUint64& aSgImageId)
+	{
+	EGLBoolean result = EGL_FALSE;
+	iEglImageLock.Wait();
+	TInt index = iEglImageArray.FindInAddressOrder((CEglImage*)aImage);
+	if (index >= 0)
+		{
+		CEglImage* eglImage = iEglImageArray[index];
+		if (eglImage->OpenForVgImage(aSize, aVgHandle, aSgImageId))
+			{
+			result = EGL_TRUE;
+			}
+		}
+	iEglImageLock.Signal();
+	return result;
+	}
+
+void CGuestEGL::EglImageClose(EGLImageKHR aImage)
+	{
+	iEglImageLock.Wait();
+	TInt index = iEglImageArray.FindInAddressOrder((CEglImage*)aImage);
+	if (index >= 0)
+		{
+		CEglImage* eglImage = iEglImageArray[index];
+		if (eglImage->Close())
+			{
+			if (eglImage->RefCount() == 0)
+				{
+				iEglImageArray.Remove(index);
+				delete eglImage;
+				}
+			}
+		}
+	iEglImageLock.Signal();
+	}
+
+// end of file eglsgimage.cpp