// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the License "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:

// Overview:

// Test the video driver kernel extension that provides chunk handle to access video memory. 

// API Information:

// HAL, UserSvr

// Details:

// - Check that the "old" GetMemoryAddress function still works, for legacy compatibility.

// - Check that we can get a chunk and that we can read/write the memory belonging to that chunk. 

// - Check that asking for a DisplayMemoryHandle twice gives the same piece of memory.  

// - Test that the same memory is available to a second process, by starting second process and

// the second process can write to memory. Validate by confirming that the value in the second process 

// is changed.

// Platforms/Drives/Compatibility:

// All.

// Assumptions/Requirement/Pre-requisites:

// Failures and causes:

// Base Port information:

// 

//

#include <e32test.h>

#include <videodriver.h>

#include <hal.h>

#include <e32svr.h>

#include <dispchannel.h>

#include "t_videomemory.h"

LOCAL_D RTest test(_L("T_VIDEOMEMORY"));

#ifndef __WINS__

#define DUMP(x) test.Printf(_L(#x"= %d =0x%08x\n"), x, x)

#endif

LOCAL_C void RunTestsForScreen(TInt aScreenID)

	{

	TInt ret = KErrNone;

#ifdef __WINS__

	RDisplayChannel displayChannel;

	test.Next(_L("Open Display Driver"));

    _LIT(KDisplayDriver, "display0");

    ret = User::LoadLogicalDevice(KDisplayDriver);

    test(KErrNone == ret || KErrAlreadyExists == ret);

	ret = displayChannel.Open(aScreenID);

    test(KErrNone == ret);

#endif

	test.Next(_L("Checking Display Memory Address"));

	// This is the real basic form of test:

	// Get the display memory address from the HAL.

	// Check that it's not zero - that would be invalid memory.

	// Try to write to the memory - it should not give a page-fault/crash.

	// Try to read the memory - we should get the same value as we wrote. 

	TInt memoryAddress=0;

	volatile TUint32 *pMemory = 0;

	ret = HAL::Get(aScreenID, HAL::EDisplayMemoryAddress, memoryAddress);

	test (KErrNone == ret || KErrNotSupported == ret);

	if (KErrNone == ret)

		{

		test.Printf(_L("Display Memory Address = %08x\n"), memoryAddress);

		// Now check that we can write to memoryAddress:

		test (memoryAddress != 0);

		pMemory = reinterpret_cast<TUint32 *>(memoryAddress);

		*pMemory = KTestValue1;

		test(KTestValue1 == *pMemory);

		}

	else

		{

		test.Printf(_L("Memory Address not available from HAL\n"));

		}

	// Second basic test. Use the HAL to fetch a handle

	// to the display memory. 

	// Check that the handle is not zero. 

	// Get the base-address of the chunk. 

	// Write this base address with a new value.

	// Read with the chunk base address to see that teh new value is there. 

	// Read the memory address from the above test and check that it changed 

	// to the new value.

	// Note that the memory address from above test MAY NOT BE SET - so 

	// check to see if it's non-zero first.

	test.Next(_L("Checking Display Handle"));

	TInt handle = 0;

	volatile TUint32 *pChunkBase = 0;

	RChunk chunk;

	ret = HAL::Get(aScreenID, HALData::EDisplayMemoryHandle, handle);

	test ((KErrNone == ret || KErrNotSupported == ret));

	if (KErrNone == ret)

		{

		// Handle should not be zero. 

		test(0 != handle);

		ret = chunk.SetReturnedHandle(handle);

		test(KErrNone == ret);

		pChunkBase = reinterpret_cast<TUint32 *>(chunk.Base());

		test.Printf(_L("Display Memory Address = %08x\n"), reinterpret_cast<TUint>(pChunkBase));

		*pChunkBase = KTestValue2;

		test(KTestValue2 == *pChunkBase);

		// We should see the new value through the pMemory pointer!

		if (pMemory)

			{

			test(KTestValue2 == *pMemory);

			}

		}

	else

		{

		test.Printf(_L("Memory Handle not available from HAL - no point in further testing\n"));

		return;

		}

	// Check that we can write to more than the first bit of memory. 

	test.Next(_L("Check that we can write to \"all\" of the memory"));

	// First, find the mode with the biggest number of bits per pixel:

	TInt totalModes;

	ret = HAL::Get(aScreenID, HAL::EDisplayNumModes, totalModes);

	test (KErrNone == ret);

	TInt biggestMode = 0;

	TInt maxBitsPerPixel = 0;

	for(TInt mode = 0; mode < totalModes; mode++)

		{

		TInt bitsPerPixel = mode;

		ret = HAL::Get(aScreenID, HAL::EDisplayBitsPerPixel, bitsPerPixel);

		test (KErrNone == ret);

		if (bitsPerPixel > maxBitsPerPixel)

			{

			maxBitsPerPixel = bitsPerPixel;

			biggestMode = mode;

			}

		}

	TInt offsetToFirstPixel = biggestMode;

	ret = HAL::Get(aScreenID, HALData::EDisplayOffsetToFirstPixel, offsetToFirstPixel);

	test(KErrNone == ret);

	TInt stride = biggestMode;

	ret = HAL::Get(aScreenID, HALData::EDisplayOffsetBetweenLines, stride);

	test(KErrNone == ret);

	TInt yPixels = biggestMode;

	ret = HAL::Get(aScreenID, HALData::EDisplayYPixels, yPixels);

	test(KErrNone == ret);

	// Note this is no attempt to be precise. xPixels is not 

	TUint maxByte = offsetToFirstPixel + stride * yPixels - sizeof(TUint32);

	volatile TUint32 *memPtr = reinterpret_cast<volatile TUint32 *>(reinterpret_cast<volatile TUint8 *>(pChunkBase) + maxByte);

	*memPtr = KTestValue1;

	test(KTestValue1 == *memPtr);

	// Ask for a second handle and see that this also points to the same bit of memory.

	test.Next(_L("Checking Display Handle second time"));

	volatile TUint32 *pChunkBase2 = 0;

	ret = HAL::Get(aScreenID, HALData::EDisplayMemoryHandle, handle);

	test ((KErrNone == ret || KErrNotSupported == ret));

	if (KErrNone == ret)

		{

		// Handle should not be zero!

		test(0 != handle);

		RChunk chunk2;

		ret = chunk2.SetReturnedHandle(handle);

		test(KErrNone == ret);

		pChunkBase2 = reinterpret_cast<TUint32 *>(chunk2.Base());

		test.Printf(_L("Display Memory Address = %08x\n"), reinterpret_cast<TUint>(pChunkBase));

		test(KTestValue2 == *pChunkBase2);

		*pChunkBase2 = KTestValue3;

		test(KTestValue3 == *pChunkBase2);

		chunk2.Close();

		}

	test.Next(_L("Checking Display Handle using second process"));

	// Create a process, let it find the handle of the memory, then read it, and write it.

	// Check that the value we have is the new value: KTestValue3.

	_LIT(KProcName, "t_videomemprocess.exe");

	RProcess process;

	ret = process.Create(KProcName, KNullDesC);

	test(KErrNone == ret);

	TRequestStatus procStatus;

	process.Logon(procStatus);

	process.SetParameter(12, aScreenID);

	process.Resume();

	User::WaitForRequest(procStatus);

	test.Next(_L("Checking that second process updated video memory"));

	// Check that we got the new value. 

	test(KTestValue4 == *pChunkBase);

	chunk.Close();

#ifdef __WINS__

	displayChannel.Close();

#endif

	// Now for some negative tests: Attempt to get a handle for a closes display.

	test.Next(_L("Negative test: Check that we CAN NOT use closed screen"));

	ret = HAL::Get(aScreenID, HALData::EDisplayMemoryHandle, handle);

	test (KErrNone != ret);

	}

LOCAL_C void NegativeTests(TInt aMaxScreens)

	{

	TInt handle;

	TInt ret;

	// Another few negative tests: Try invalid screen numbers.

	test.Next(_L("Negative tests: Invalid screen ID's"));

	ret = HAL::Get(aMaxScreens, HALData::EDisplayMemoryHandle, handle);

	test (KErrNone != ret);

	ret = HAL::Get(aMaxScreens+1, HALData::EDisplayMemoryHandle, handle);

	test (KErrNone != ret);

	ret = HAL::Get(4718, HALData::EDisplayMemoryHandle, handle);

	test (KErrNone != ret);

	ret = HAL::Get(-1, HALData::EDisplayMemoryHandle, handle);

	test (KErrNone != ret);

	}

GLDEF_C TInt E32Main()

//

//

    {

	test.Title();

//

#if defined(__EPOC32__) && defined(__CPU_X86)

	test.Printf(_L("Doesn't run on X86\n"));

#else

	test.Start(_L("Testing Video Memory HAL interfaces"));

	TInt screens = 0;	

	TInt ret=HAL::Get(HAL::EDisplayNumberOfScreens, screens);

	test((KErrNone == ret));

	// We expect that there is at least ONE screen. 

	test((screens > 0));

	for(TInt i=0;i<screens;i++)

		{

		RunTestsForScreen(i);

		}

	NegativeTests(screens);

#endif

	return KErrNone;

}