videomanrendererogl.cpp

VideoMan is a very easy image acquisition library. It is able to manage many video inputs at the sam

			int iniC = screenSize.right * despC;
			int finC = screenSize.right * despCs;
			int iniF = screenSize.top * despF;
			int finF = screenSize.top * despFs;
			float tamX = finC - iniC;
			float tamY = finF - iniF;

			float aspectX = (float)tamX / (float)inputList[v].width;
			float aspectY = (float)tamY / (float)inputList[v].height;
			if ( aspectX < aspectY )
			{
				inputList[v].screenCoords.left = iniC;
				inputList[v].screenCoords.right = tamX;
				inputList[v].screenCoords.top = (float)inputList[v].height * aspectX;
				inputList[v].screenCoords.bottom = iniF;//+((float)tamY - (float)videoList[v].screenCoords.top)*0.5f;
			}
			else
			{
				inputList[v].screenCoords.bottom = iniF;
				inputList[v].screenCoords.top = tamY;
				inputList[v].screenCoords.right = (float)inputList[v].width * aspectY;
				inputList[v].screenCoords.left = iniC + ( (float)tamX - (float)inputList[v].screenCoords.right ) * 0.5f;
			}
			inputList[v].activated = true;
		
			v++;
		}
	}*/
}

void VideoManRendererOGL::activateVideoInput( size_t v )
{
	assert( v >= 0  &&  v < inputList.size() && "activateVideoInput: Index out of range");

	if ( inputList[v].activated || !inputList[v].supported )
		return;

	activatedInputs++;
	inputList[v].activated = true;
	changeScreenSize( screenSize.left,screenSize.bottom,screenSize.width,screenSize.height  );	
}

void VideoManRendererOGL::deactivateAllVideoInputs()
{
	activatedInputs = 0;
	for( size_t v = 0; v < inputList.size(); v++ )
	{
		inputList[v].activated = false;
	}
	changeScreenSize( screenSize.left,screenSize.bottom,screenSize.width,screenSize.height  );
}

void VideoManRendererOGL::deactivateVideoInput( size_t v )
{
	assert ( v >= 0  &&  v < inputList.size() && "deactivateVideoInput: Index out of range");

	if ( !inputList[v].activated )
		return;
	activatedInputs--;
	inputList[v].activated=false;
	changeScreenSize( screenSize.left,screenSize.bottom,screenSize.width,screenSize.height  );
}

bool VideoManRendererOGL::isActivated( size_t v )
{
	assert ( v >= 0  &&  v < inputList.size() && "deactivateVideoInput: Index out of range");

	return ( inputList[v].activated );
}

void VideoManRendererOGL::changeVisualizationMode( int vM )
{
	visualizationMode = vM;
	changeScreenSize( screenSize.left, screenSize.bottom, screenSize.width, screenSize.height  );	
}

void VideoManRendererOGL::changeMainVisualizationInput( const size_t &v )
{
	assert ( v >= 0  &&  v < inputList.size() && "changeMainVisualizationInput: Index out of range");
	if ( inputList[v].activated )
	{
		mainVisualizationInput = v;
		changeScreenSize( screenSize.left, screenSize.bottom, screenSize.width, screenSize.height  );	
	}
}

void VideoManRendererOGL::changeScreenSize( int left, int bottom, int width, int height )
{
	screenSize.init( left, bottom, width, height );
	if ( screenSize.height <= 0 || screenSize.width <= 0 )
		return;
	if ( inputList.size() == 0 || activatedInputs == 0 )
		return;

	switch ( visualizationMode )
	{
		case 0:
		default:
		{
			changeScreenSizeV0( left, bottom, width, height );
			break;
		}
		case 1:
		{
			if ( activatedInputs <= 1 )
				changeScreenSizeV0( left, bottom, width, height );
			else
				changeScreenSizeV1( left, bottom, width, height );
			break;
		}
	}
}


void VideoManRendererOGL::changeScreenSizeV0( int left, int bottom, int width, int height )
{
	float numColsF = sqrt( ( (float)screenSize.width / (float)screenSize.height ) * 1.33333f * (float) activatedInputs );
	int numCols = static_cast<int>( floor( numColsF ) );
	if ( numCols == 0 ) numCols = 1;
	if ( numCols > activatedInputs ) numCols = activatedInputs;
	//if ((numColsF-numCols)>(numColsF-(numCols+1)))
	//	numCols=numCols+1;
	int numFils = static_cast<int>( ceil( (float)activatedInputs / (float)numCols ) );

	float despC = 0.0f;
	float despF = 0.0f;
	float despCs = 0.0f;
	float despFs = 0.0f;	
	int actual = 0;
	for ( int i = 0; i < (int)inputList.size(); i++ )
	{
		if ( inputList[i].activated )
		{
			//Calculate Which is its row
			int row = static_cast<int>( floor( (float)actual / (float)numCols ) );
			//Calculate Which is its column
			int col = actual % numCols;
			despC = (float)col / (float)numCols;
			despF = (float)row / (float)numFils;
			despCs = (float)(col+1) / (float)numCols;
			despFs = (float)(row+1) / (float)numFils;
			int iniC = static_cast<int>( screenSize.width * despC );
			int finC = static_cast<int>( screenSize.width * despCs );
			int iniF = static_cast<int>( screenSize.height - screenSize.height * despFs );
			int finF = static_cast<int>( screenSize.height - screenSize.height * despF);
			int tamX = finC - iniC;
			int tamY = finF - iniF;

			calculateAspectRatio( iniC, iniF, tamX, tamY, i );
			
			actual++;
		}
	}	
}

void VideoManRendererOGL::calculateAspectRatio( int left, int bottom, int width, int height, size_t index )
{
	float aspectX = (float)width / (float)inputList[index].width;
	float aspectY = (float)height / (float)inputList[index].height;
	if ( aspectX < aspectY )
	{
		inputList[index].screenCoords.left = left;
		inputList[index].screenCoords.width = static_cast<long>( width );
		inputList[index].screenCoords.height = static_cast<long>( (float)inputList[index].height * aspectX );
		//inputList[i].screenCoords.bottom = iniF;//+((float)tamY - (float)videoList[v].screenCoords.top)*0.5f;
		inputList[index].screenCoords.bottom = static_cast<long>( bottom + (height - aspectX*inputList[index].height)*0.5f );		
		
	}
	else
	{
		inputList[index].screenCoords.bottom = bottom;
		inputList[index].screenCoords.height = static_cast<long>( height );
		inputList[index].screenCoords.width = static_cast<long>( (float)inputList[index].width * aspectY );
		inputList[index].screenCoords.left = static_cast<long>( left + ( (float)width - (float)inputList[index].screenCoords.width ) * 0.5f );
	}
}


void VideoManRendererOGL::changeScreenSizeV1( int left, int bottom, int width, int height )
{
	int despY = height / static_cast<int>( inputList.size() );
	for ( int i = 0; i < (int)inputList.size(); i++ )
	{
		if ( inputList[i].activated )
		{
			if ( mainVisualizationInput == i )
			{
				calculateAspectRatio( left + width * 1 / 4, bottom, width * 3 / 4, height, i );								
			}
			else
			{
				calculateAspectRatio( left, bottom +  despY * i, width * 1 / 4, despY, i );				
			}
		}
	}
}



int VideoManRendererOGL::screenToImageCoords( float &x, float &y )
{
	size_t i = 0;
	int selected = -1;
	y = screenSize.height - y;
	while( selected == -1 && i<inputList.size() )
	{	
		if ( inputList[i].activated )
		{
			float dY = y - inputList[i].screenCoords.bottom;
			float dX = x - inputList[i].screenCoords.left;
			if ( dX >= 0 && dX <= inputList[i].screenCoords.width &&
				dY >= 0 && dY <= inputList[i].screenCoords.height )
			{
				selected = static_cast<int>( i );
			}
		}
		i++;
	}
	if ( selected != -1 )
	{
		x = static_cast<float>( inputList[selected].width ) * ( x - static_cast<float>( inputList[selected].screenCoords.left ) ) / static_cast<float>( inputList[selected].screenCoords.width );	
		y = static_cast<float>( inputList[selected].height ) * ( y - static_cast<float>( inputList[selected].screenCoords.bottom ) ) / static_cast<float>( inputList[selected].screenCoords.height );
		y = static_cast<float>( inputList[selected].height ) - y;
		if ( x >= 0 && x < inputList[selected].width && y >= 0 && y < inputList[selected].height )
			return selected;
		else
			return -1;

	}
	return selected;
}

bool VideoManRendererOGL::imageToScreenCoords( const size_t &v, float &x, float &y )
{
	assert( v >= 0  &&  v < inputList.size() && "imageToScreenCoords: Index out of range");

	//x = static_cast<float>( inputList[selected].width ) * ( x - static_cast<float>( inputList[selected].screenCoords.left ) ) / static_cast<float>( inputList[selected].screenCoords.right );	
	x = static_cast<float>( inputList[v].screenCoords.left ) + static_cast<float>( inputList[v].screenCoords.width ) * x / static_cast<float>( inputList[v].width );	
	//y = static_cast<float>( inputList[selected].height ) * ( y - static_cast<float>( inputList[selected].screenCoords.bottom ) ) / static_cast<float>( inputList[selected].screenCoords.top );
	y = static_cast<float>( inputList[v].screenCoords.bottom ) + static_cast<float>( inputList[v].screenCoords.height ) * y / static_cast<float>( inputList[v].height );		

	return true;
}

bool VideoManRendererOGL::getScreenCoords( const size_t &v, int &left, int &bottom, int &width, int &height )
{
	assert( v >= 0  &&  v < inputList.size() && "getScreenCoords: Index out of range");
	if ( !inputList[v].activated )
		return false;
	left = inputList[v].screenCoords.left;
	bottom = inputList[v].screenCoords.bottom;
	width = inputList[v].screenCoords.width;
	height = inputList[v].screenCoords.height;
	return true;
}

void VideoManRendererOGL::getTextureCoords( const size_t &input, float &left, float &bottom, float &right, float &up )
{
	assert( input >= 0  &&  input < inputList.size() && "getTextureCoords: Index out of range");
	left = inputList[input].tu1;
	right = inputList[input].tu2;
	up = inputList[input].tv2;
	bottom = inputList[input].tv1;

}

inline void VideoManRendererOGL::activateViewport( const size_t &v )
{
	assert( v >= 0  &&  v < inputList.size() && "activateViewport: Index out of range");
	glViewport( inputList[v].screenCoords.left, inputList[v].screenCoords.bottom, inputList[v].screenCoords.width, inputList[v].screenCoords.height);
}


inline void VideoManRendererOGL::activateTexture( const size_t &v )
{
	assert( v >= 0  &&  v < inputList.size() && "activateTexture: Index out of range");
	glBindTexture(GL_TEXTURE_2D, inputList[v].texture);
}

void VideoManRendererOGL::setVerticalFlip( const size_t &v, bool value )
{
	assert( v >= 0  &&  v < inputList.size() && "setVerticalFlip: Index out of range");
	
	if ( value != inputList[v].verticalFlip )
	{
		inputList[v].verticalFlip = value;	
		float aux = inputList[v].tv1;
		inputList[v].tv1 = inputList[v].tv2; 
		inputList[v].tv2 = aux;
	}
}

bool VideoManRendererOGL::getVerticalFlip( const size_t &v )
{
	assert( v >= 0  &&  v < inputList.size() && "getVerticalFlip: Index out of range");
	return inputList[v].verticalFlip;
}

void VideoManRendererOGL::setHorizontalFlip( const size_t &v, bool value )
{
	assert( v >= 0  &&  v < inputList.size() && "setHorizontalFlip: Index out of range");

	if ( value != inputList[v].horizontalFlip )
	{
		inputList[v].horizontalFlip = value;

		float aux = inputList[v].tu1;
		inputList[v].tu1 = inputList[v].tu2;
		inputList[v].tu2 = aux;
	}
}

bool VideoManRendererOGL::getHorizontalFlip( const size_t &v )
{
	assert( v >= 0  &&  v < inputList.size() && "getHorizontalFlip: Index out of range");
	return inputList[v].horizontalFlip;
}