d3dfont.cpp

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	float x, float y, float z,
	float xScale, float yScale, D3DCOLOR color,
	const TCHAR* str, int flags )
{
	if( !mDevice )
		return E_FAIL;
	
	// Set up renderstate
	mBlockSaved->Capture();
	mBlockDrawText->Apply();
	mDevice->SetFVF( D3DFVF_FONT2DVERTEX );
	mDevice->SetPixelShader( NULL );
	mDevice->SetStreamSource( 0, mVB, 0, sizeof(SFont2DVertex) );
	
	// Set filter states
	if( flags & FILTERED ) {
		mDevice->SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR );
		mDevice->SetSamplerState( 0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR );
	}
	
	D3DVIEWPORT9 vp;
	mDevice->GetViewport( &vp );
	float lineHeight = ( mTexCoords[0][3] - mTexCoords[0][1] ) * mTexHeight;
	
	// Center the text block in the viewport
	if( flags & CENTERED_X ) {
		const TCHAR* strTmp = str;
		float xFinal = 0.0f;
		
		while( *strTmp ) {
			TCHAR c = *strTmp++;
			
			if( c == _T('\n') )
				break;	// Isn't supported.  
			if( (c-32) < 0 || (c-32) >= 128-32 )
				continue;
			
			float tx1 = mTexCoords[c-32][0];
			float tx2 = mTexCoords[c-32][2];
			
			float w = (tx2-tx1)*mTexWidth;
			
			w *= (xScale*vp.Height)/lineHeight;
			
			xFinal += w - (2 * mSpacing) * (xScale*vp.Height)/lineHeight;
		}
		
		x = -xFinal/vp.Width;
	}
	if( flags & CENTERED_Y ) {
		y = -lineHeight/vp.Height;
	}
	
	float sx  = (x+1.0f)*vp.Width/2;
	float sy  = (y+1.0f)*vp.Height/2;
	float sz  = z;
	float rhw = 1.0f;
	
	// Adjust for character spacing
	sx -= mSpacing * (xScale*vp.Height)/lineHeight;
	float startX = sx;
	
	// Fill vertex buffer
	SFont2DVertex* pVertices;
	int numTris = 0;
	mVB->Lock( 0, 0, (void**)&pVertices, D3DLOCK_DISCARD );
	
	while( *str ) {
		TCHAR c = *str++;
		
		if( c == _T('\n') ) {
			sx	= startX;
			sy += yScale*vp.Height;
		}
		
		if( (c-32) < 0 || (c-32) >= 128-32 )
			continue;
		
		float tx1 = mTexCoords[c-32][0];
		float ty1 = mTexCoords[c-32][1];
		float tx2 = mTexCoords[c-32][2];
		float ty2 = mTexCoords[c-32][3];
		
		float w = (tx2-tx1)*mTexWidth;
		float h = (ty2-ty1)*mTexHeight;
		
		w *= (xScale*vp.Height)/lineHeight;
		h *= (yScale*vp.Height)/lineHeight;
		
		if( c != _T(' ') ) {
			*pVertices++ = gInitFont2DVertex( D3DXVECTOR4(sx+0-0.5f,sy+h-0.5f,sz,rhw), color, tx1, ty2 );
			*pVertices++ = gInitFont2DVertex( D3DXVECTOR4(sx+0-0.5f,sy+0-0.5f,sz,rhw), color, tx1, ty1 );
			*pVertices++ = gInitFont2DVertex( D3DXVECTOR4(sx+w-0.5f,sy+h-0.5f,sz,rhw), color, tx2, ty2 );
			*pVertices++ = gInitFont2DVertex( D3DXVECTOR4(sx+w-0.5f,sy+0-0.5f,sz,rhw), color, tx2, ty1 );
			*pVertices++ = gInitFont2DVertex( D3DXVECTOR4(sx+w-0.5f,sy+h-0.5f,sz,rhw), color, tx2, ty2 );
			*pVertices++ = gInitFont2DVertex( D3DXVECTOR4(sx+0-0.5f,sy+0-0.5f,sz,rhw), color, tx1, ty1 );
			numTris += 2;
			
			if( numTris*3 > (MAX_NUM_VERTICES-6) ) {
				// Unlock, render, and relock the vertex buffer
				mVB->Unlock();
				mDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 0, numTris );
				mVB->Lock( 0, 0, (void**)&pVertices, D3DLOCK_DISCARD );
				numTris = 0L;
			}
		}
		
		sx += w - (2 * mSpacing) * (xScale*vp.Height)/lineHeight;
	}
	
	// Unlock and render the vertex buffer
	mVB->Unlock();
	if( numTris > 0 )
		mDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 0, numTris );
	
	// Restore the modified renderstates
	mBlockSaved->Apply();
	
	return S_OK;
}
*/

/** Draws 2D text. Note that sx and sy are in pixels. */
HRESULT CD3DFont::drawText( float sx, float sy, D3DCOLOR color, const TCHAR* str, int flags )
{
	CD3DDevice& device = CD3DDevice::getInstance();
	if( !device.isDevice() )
		return E_FAIL;
	
	// Setup renderstate
	mBlockSaved->Capture();
	mBlockDrawText->Apply();
	device.setDeclarationFVF( D3DFVF_FONT2DVERTEX );
	device.getDevice().SetPixelShader( NULL );
	device.getDevice().SetStreamSource( 0, mVB, 0, sizeof(SFont2DVertex) );
	
	// Set filter states
	if( flags & FILTERED ) {
		device.getDevice().SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR );
		device.getDevice().SetSamplerState( 0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR );
	}
	
	// Center the text block in the viewport
	if( flags & CENTERED_X ) {
		D3DVIEWPORT9 vp;
		device.getDevice().GetViewport( &vp );
		const TCHAR* strTmp = str;
		float xFinal = 0.0f;
		
		while( *strTmp ) {
			TCHAR c = *strTmp++;
			
			if( c == _T('\n') )
				break;	// Isn't supported.  
			if( (c-32) < 0 || (c-32) >= 128-32 )
				continue;
			
			float tx1 = mTexCoords[c-32][0];
			float tx2 = mTexCoords[c-32][2];
			
			float w = (tx2-tx1) *  mTexWidth / mTextScale;
			
			xFinal += w - (2 * mSpacing);
		}
		
		sx = (vp.Width-xFinal)/2.0f;
	}
	if( flags & CENTERED_Y ) {
		D3DVIEWPORT9 vp;
		device.getDevice().GetViewport( &vp );
		float lineHeight = ((mTexCoords[0][3]-mTexCoords[0][1])*mTexHeight);
		sy = (vp.Height-lineHeight)/2;
	}
	
	// Adjust for character spacing
	sx -= mSpacing;
	float startX = sx;
	
	// Fill vertex buffer
	SFont2DVertex* pVertices = NULL;
	int numTris = 0;
	mVB->Lock( 0, 0, (void**)&pVertices, D3DLOCK_DISCARD );
	
	while( *str ) {
		TCHAR c = *str++;
		
		if( c == _T('\n') ) {
			sx = startX;
			sy += (mTexCoords[0][3]-mTexCoords[0][1])*mTexHeight;
		}
		
		if( (c-32) < 0 || (c-32) >= 128-32 )
			continue;
		
		float tx1 = mTexCoords[c-32][0];
		float ty1 = mTexCoords[c-32][1];
		float tx2 = mTexCoords[c-32][2];
		float ty2 = mTexCoords[c-32][3];
		
		float w = (tx2-tx1) *  mTexWidth / mTextScale;
		float h = (ty2-ty1) * mTexHeight / mTextScale;
		
		if( c != _T(' ') ) {
			*pVertices++ = gInitFont2DVertex( D3DXVECTOR4(sx+0-0.5f,sy+h-0.5f,0.9f,1.0f), color, tx1, ty2 );
			*pVertices++ = gInitFont2DVertex( D3DXVECTOR4(sx+0-0.5f,sy+0-0.5f,0.9f,1.0f), color, tx1, ty1 );
			*pVertices++ = gInitFont2DVertex( D3DXVECTOR4(sx+w-0.5f,sy+h-0.5f,0.9f,1.0f), color, tx2, ty2 );
			*pVertices++ = gInitFont2DVertex( D3DXVECTOR4(sx+w-0.5f,sy+0-0.5f,0.9f,1.0f), color, tx2, ty1 );
			*pVertices++ = gInitFont2DVertex( D3DXVECTOR4(sx+w-0.5f,sy+h-0.5f,0.9f,1.0f), color, tx2, ty2 );
			*pVertices++ = gInitFont2DVertex( D3DXVECTOR4(sx+0-0.5f,sy+0-0.5f,0.9f,1.0f), color, tx1, ty1 );
			numTris += 2;
			
			if( numTris*3 > (MAX_NUM_VERTICES-6) ) {
				// Unlock, render, and relock the vertex buffer
				mVB->Unlock();
				device.getDevice().DrawPrimitive( D3DPT_TRIANGLELIST, 0, numTris );
				pVertices = NULL;
				mVB->Lock( 0, 0, (void**)&pVertices, D3DLOCK_DISCARD );
				numTris = 0L;
			}
		}
		
		sx += w - (2 * mSpacing);
	}
	
	// Unlock and render the vertex buffer
	mVB->Unlock();
	if( numTris > 0 )
		device.getDevice().DrawPrimitive( D3DPT_TRIANGLELIST, 0, numTris );
	
	// Restore the modified renderstates
	mBlockSaved->Apply();
	
	return S_OK;
}


/** Renders 3D text. */
/*
HRESULT CD3DFont::render3DText( const TCHAR* str, int flags )
{
	if( mDevice == NULL )
		return E_FAIL;
	
	// Setup renderstate
	mBlockSaved->Capture();
	mBlockDrawText->Apply();
	mDevice->SetFVF( D3DFVF_FONT3DVERTEX );
	mDevice->SetPixelShader( NULL );
	mDevice->SetStreamSource( 0, mVB, 0, sizeof(SFont3DVertex) );
	
	// Set filter states
	if( flags & FILTERED ) {
		mDevice->SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR );
		mDevice->SetSamplerState( 0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR );
	}
	
	// Position for each text element
	float x = 0.0f;
	float y = 0.0f;
	
	// Center the text block at the origin (not the viewport)
	if( flags & CENTERED_X ) {
		SIZE sz;
		getTextExtent( str, sz );
		x = -(((float)sz.cx)/10.0f)/2.0f;
	}
	if( flags & CENTERED_Y ) {
		SIZE sz;
		getTextExtent( str, sz );
		y = -(((float)sz.cy)/10.0f)/2.0f;
	}
	
	// Turn off culling for two-sided text
	if( flags & TWO_SIDED )
		mDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );
	
	// Adjust for character spacing
	x -= mSpacing / 10.0f;
	float startX = x;
	TCHAR c;
	
	// Fill vertex buffer
	SFont3DVertex* pVertices;
	int numTris = 0;
	mVB->Lock( 0, 0, (void**)&pVertices, D3DLOCK_DISCARD );
	
	while( (c = *str++) != 0 ) {
		if( c == '\n' ) {
			x = startX;
			y -= (mTexCoords[0][3]-mTexCoords[0][1])*mTexHeight/10.0f;
		}
		
		if( (c-32) < 0 || (c-32) >= 128-32 )
			continue;
		
		float tx1 = mTexCoords[c-32][0];
		float ty1 = mTexCoords[c-32][1];
		float tx2 = mTexCoords[c-32][2];
		float ty2 = mTexCoords[c-32][3];
		
		float w = (tx2-tx1) * mTexWidth  / ( 10.0f * mTextScale );
		float h = (ty2-ty1) * mTexHeight / ( 10.0f * mTextScale );
		
		if( c != _T(' ') ) {
			*pVertices++ = gInitFont3DVertex( D3DXVECTOR3(x+0,y+0,0), D3DXVECTOR3(0,0,-1), tx1, ty2 );
			*pVertices++ = gInitFont3DVertex( D3DXVECTOR3(x+0,y+h,0), D3DXVECTOR3(0,0,-1), tx1, ty1 );
			*pVertices++ = gInitFont3DVertex( D3DXVECTOR3(x+w,y+0,0), D3DXVECTOR3(0,0,-1), tx2, ty2 );
			*pVertices++ = gInitFont3DVertex( D3DXVECTOR3(x+w,y+h,0), D3DXVECTOR3(0,0,-1), tx2, ty1 );
			*pVertices++ = gInitFont3DVertex( D3DXVECTOR3(x+w,y+0,0), D3DXVECTOR3(0,0,-1), tx2, ty2 );
			*pVertices++ = gInitFont3DVertex( D3DXVECTOR3(x+0,y+h,0), D3DXVECTOR3(0,0,-1), tx1, ty1 );
			numTris += 2;
			
			if( numTris*3 > (MAX_NUM_VERTICES-6) ) {
				// Unlock, render, and relock the vertex buffer
				mVB->Unlock();
				mDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 0, numTris );
				mVB->Lock( 0, 0, (void**)&pVertices, D3DLOCK_DISCARD );
				numTris = 0;
			}
		}
		
		x += w - (2 * mSpacing) / 10.0f;
	}
	
	// Unlock and render the vertex buffer
	mVB->Unlock();
	if( numTris > 0 )
		mDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 0, numTris );
	
	// Restore the modified renderstates
	mBlockSaved->Apply();
	
	return S_OK;
}
*/