// Copyright (c) 2007-2009 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:

//

/**

 @file

 @test

 @internalComponent

*/

#include "t_pseudoappopenglanimation.h"

/** Vertex co-ordinates for a cube */

const GLfloat KVertexArray[] = {	-10.0f,  10.0f,  10.0f,

									 10.0f,  10.0f,  10.0f,

									-10.0f, -10.0f,  10.0f,

									 10.0f, -10.0f,  10.0f,

									-10.0f,  10.0f, -10.0f,

									 10.0f,  10.0f, -10.0f,

									-10.0f, -10.0f, -10.0f,

									 10.0f, -10.0f, -10.0f };

/** Left, near, top co-ordinate index */

const GLubyte LNT = 0;

/** Right, near, top co-ordinate index */

const GLubyte RNT = 1;

/** Left, far, top co-ordinate index */

const GLubyte LFT = 2;

/** Right, far, top co-ordinate index */

const GLubyte RFT = 3;

/** Left, near, bottom co-ordinate index */

const GLubyte LNB = 4;

/** Right, near, bottom co-ordinate index */

const GLubyte RNB = 5;

/** Left, far, bottom co-ordinate index */

const GLubyte LFB = 6;

/** Right, far, bottom co-ordinate index */

const GLubyte RFB = 7;

/** Number of indicies per face */

const TInt KNumFaceIndices = 6;

/** Array of indicies into vertex array to define a cube */

const GLubyte KIndexArray[] = {	RNB, LNB, LFB, RNB, LFB, RFB,

								RNB, RFB, RFT, RNB, RFT, RNT,

								LNB, RNB, RNT, LNB, RNT, LNT,

								LFB, LNB, LNT, LFB, LNT, LFT,

								RFB, LFB, LFT, RFB, LFT, RFT,

								LNT, RNT, RFT, LNT, RFT, LFT };

COpenGLAnimation* COpenGLAnimation::NewL(RWindow* aWin, const TDisplayMode& aMode, const TSize& aSurfaceSize,

																		  const TInt aHorizontalRate,

																		  const TInt aVerticalRate)

	{

	RDebug::Print(_L("Creating COpenGLAnimation class\n"));

    COpenGLAnimation* self = new (ELeave) COpenGLAnimation(aMode,aSurfaceSize,aHorizontalRate,aVerticalRate);

    CleanupStack::PushL(self);

    self->ConstructL(aWin);

    CleanupStack::Pop(); // self;

    return self;

	}

COpenGLAnimation::COpenGLAnimation(const TDisplayMode& aMode, const TSize& aSurfaceSize, const TInt aHorizontalRate, const TInt aVerticalRate)

: CEglBase(aMode,aSurfaceSize,aHorizontalRate,aVerticalRate)

	{

	}

void COpenGLAnimation::ConstructL(RWindow* aWin)

	{

	BaseConstructL(aWin);

	// eglBindAPI

	TInt ret = eglBindAPI(EGL_OPENGL_ES_API);

	TestL(ret, _L("eglBindAPI failed"));

	__ASSERT_DEBUG(iUseConfig>0, User::Panic(_L("COpenGLAnimation"), KErrArgument));

	// eglCreateContext

	iContext = eglCreateContext(iDisplay, iUseConfig, EGL_NO_CONTEXT, NULL);

	TestL(iContext!=EGL_NO_CONTEXT, _L("eglCreateContext failed"));

	// Make surface and context current on the display object

	ret = eglMakeCurrent(iDisplay, iSurface, iSurface, iContext);

	TestL(ret, _L("eglMakeCurrent failed"));

	CheckGlErrorL(_L("GL_Problems creating second surface"));

	}

COpenGLAnimation::~COpenGLAnimation()

	{

	}

/** Draws a cube using OpenGLES commands */

void COpenGLAnimation::DrawToEglL()

	{

	// Increment rotation variable

	iRotAngle += 15;

	// Set half-transparent drawing value

	const GLfloat KAlphaValue = 0.5f;

	// Remove hidden faces

	glEnable(GL_CULL_FACE);

	glCullFace(GL_FRONT);

	// Use a flat shading model

	glShadeModel(GL_FLAT);

	// Set the projection parameters

	glMatrixMode(GL_PROJECTION);

	glLoadIdentity();

	glFrustumf(-0.154f, 0.154f, -0.0577f, 0.0577f, 0.1f, 100.0f);

	// Set the cube position

	glMatrixMode(GL_MODELVIEW);

	glLoadIdentity();

	// Move position away from viewpoitn

	glTranslatef(iX+=iHorizontalRate, 0.0f, -50.0f);

	// Rotate 45 degrees about the z-axis

	glRotatef(45.0f, 0.0f, 0.0f, 1.0f);

	// Rotate iX degrees about the y- and z-axes

	glRotatef(iRotAngle, 0.0f, 1.0f, 1.0f);

	// Clear the buffer

	glClearColor(0.0f, 0.0f, 0.0f, 0.0f);

	glClear(GL_COLOR_BUFFER_BIT);

	// Enable vertex processing

	glEnableClientState(GL_VERTEX_ARRAY);

	// Set the vertex array to use

	glVertexPointer(3, GL_FLOAT, 0, KVertexArray);

	const GLubyte* faceIndex = KIndexArray;

	// Process cube faces

	for (TInt face = 1; face <= 6; face++)

		{

		const GLfloat red = (face < 2 || face > 4) ? 1.0f : 0;

		const GLfloat green = (face > 0 && face < 4) ? 1.0f : 0;

		const GLfloat blue = (face > 2) ? 1.0f : 0;

		// Set colour to draw in

		glColor4f(red, green, blue, KAlphaValue);

		// Draw the vertices that make up each face as two triangles

		glDrawElements(GL_TRIANGLES, KNumFaceIndices, GL_UNSIGNED_BYTE, faceIndex);

		faceIndex += KNumFaceIndices;

		}

	// Flush colour buffer to the window surface

	eglSwapBuffers(iDisplay, iSurface);

	}

void COpenGLAnimation::DrawL(CTestSurfaceRasterizer*  /*aSurfaceRasterizer*/, SurfaceDetails& /*aSurfDetails*/)

	{

	DrawToEglL();

	}

void COpenGLAnimation::CheckGlErrorL(const TDesC& aMessage)

	{

	GLenum err=glGetError();

	if ( err != GL_NO_ERROR )

		{

		RDebug::Print(_L("Error:0x%x - %S"),err,&aMessage);

		User::Leave(KErrUnknown);

		}

	}