/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
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licensors of this Program grant you additional
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You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
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*==LICENSE==*/
///////////////////////////////////////////////////////////////////////////////
//																			 //
//	plTextGenerator Class Functions											 //
//	Cyan, Inc.																 //
//																			 //
//// Version History //////////////////////////////////////////////////////////
//																			 //
//	12.13.2001 mcn - Created.  												 //
//																			 //
///////////////////////////////////////////////////////////////////////////////

#include "hsWindows.h"
#include "hsTypes.h"
#include "hsMatrix44.h"
#include "../pnKeyedObject/hsKeyedObject.h"
#include "plTextGenerator.h"
#include "../plGImage/plMipmap.h"
#include "../plPipeline/hsGDeviceRef.h"
#include "../pnMessage/plRefMsg.h"

#include "plgDispatch.h"
#include "hsResMgr.h"

// Because tempKeys haven't been fixed yet (mf says to blame Eric Ellis), reffing
// objects when we have a tempKey (or they have a tempKey) just don't work. In
// fact, it will do nasty things like crashing on shutdown. Until then, we simply
// won't do the refs. Note that this is BAD, but given the only time we currently
// use these objects are very limited, controlled cases that *should* be okay
// for now, we should be reasonably safe. For now.
//#define MCN_DO_REFS

//// Constructor & Destructor /////////////////////////////////////////////////

plTextGenerator::plTextGenerator()
{
	fHost = nil;
}

plTextGenerator::plTextGenerator( plMipmap *host, UInt16 width, UInt16 height )
{
	fHost = nil;
	Attach( host, width, height );
}

plTextGenerator::~plTextGenerator()
{
	// This also won't work until tempKeys work, since the mipmap will be gone by 
	// this time, in which case, calling Detach() crashes
#ifdef MCN_DO_REFS
	Detach();
#endif
}

//// Attach ///////////////////////////////////////////////////////////////////
//	Grab onto a plMipmap, suck the texture out of it and replace it with our
//	own.		

void	plTextGenerator::Attach( plMipmap *host, UInt16 width, UInt16 height )
{
	UInt16		textWidth, textHeight;


	hsAssert( fHost == nil, "Attempting to attach an already attached plTextGenerator" );

	fHost = host;

	/// Suck the old texture data out
	fHost->Reset();

	/// Make some new

	// Note that we need POW-2 textures, so we go for the next one up that will
	// fit what we need
	for( textWidth = 1; textWidth < width; textWidth <<= 1 );
	for( textHeight = 1; textHeight < height; textHeight <<= 1 );

	fWidth = width;
	fHeight = height;
	fHost->fImage = (void *)IAllocateOSSurface( textWidth, textHeight );
	fHost->SetConfig( plMipmap::kARGB32Config );
	fHost->fWidth = textWidth;
	fHost->fHeight = textHeight;
	fHost->fPixelSize = 32;
	fHost->fRowBytes = textWidth * 4;
	fHost->fNumLevels = 1;
	fHost->fFlags |= plMipmap::kUserOwnsBitmap | plMipmap::kDontThrowAwayImage;
	fHost->fCompressionType = plMipmap::kUncompressed;
	fHost->fUncompressedInfo.fType = plMipmap::UncompressedInfo::kRGB8888;
	fHost->IBuildLevelSizes();
	fHost->fTotalSize = fHost->GetLevelSize( 0 );

	// Destroy the old texture ref, since it's probably completely nutsoid at this point.
	// This should force the pipeline to recreate one more suitable for our use
	fHost->SetDeviceRef( nil );

	// Some init color
	hsColorRGBA	color;
	color.Set( 0.f, 0.f, 0.f, 1.f );
	ClearToColor( color );
	FlushToHost();

#ifdef MCN_DO_REFS
	/// Of course, brilliantly enough, if we did an attach on the constructor, we don't have a key
	/// yet, so we better give ourselves one before we can call AddViaNotify()
	if( GetKey() == nil )
	{
		char	str[ 256 ];
		sprintf( str, "plTextGen:%s", fHost->GetKeyName() );
		hsgResMgr::ResMgr()->NewKey( str, this, plLocation::kGlobalFixedLoc );
	}

	/// Send ourselves a passive ref of the mipmap, so we get notified if and when it goes away
	hsgResMgr::ResMgr()->AddViaNotify( fHost->GetKey(), TRACKED_NEW plGenRefMsg( GetKey(), plRefMsg::kOnCreate, 0, 0 ), plRefFlags::kActiveRef );
#endif
	/// All done!
}

//// IAllocateOSSurface ///////////////////////////////////////////////////////
//	OS-specific. Allocates a rectangular bitmap of the given dimensions that
//	the OS can draw text into. Returns a pointer to the pixels.

UInt32		*plTextGenerator::IAllocateOSSurface( UInt16 width, UInt16 height )
{
#if HS_BUILD_FOR_WIN32

	BITMAPINFO	bmi;


	// Create a new DC and bitmap that we can draw characters to
	memset( &bmi.bmiHeader, 0, sizeof( BITMAPINFOHEADER ) );
	bmi.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
	bmi.bmiHeader.biWidth = width;
	bmi.bmiHeader.biHeight = -(int)height;
	bmi.bmiHeader.biPlanes = 1;
	bmi.bmiHeader.biCompression = BI_RGB;
	bmi.bmiHeader.biBitCount = 32;
	
	fWinRGBDC = CreateCompatibleDC( nil );
	fWinRGBBitmap = CreateDIBSection( fWinRGBDC, &bmi, DIB_RGB_COLORS, (void **)&fWinRGBBits, nil, 0 );
	SetMapMode( fWinRGBDC, MM_TEXT );
	SetBkMode( fWinRGBDC, TRANSPARENT );
	SetTextAlign( fWinRGBDC, TA_TOP | TA_LEFT );

	SelectObject( fWinRGBDC, fWinRGBBitmap );

	// Now create a second DC/bitmap combo, this one for writing alpha values to
	memset( &bmi.bmiHeader, 0, sizeof( BITMAPINFOHEADER ) );
	bmi.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
	bmi.bmiHeader.biWidth = width;
	bmi.bmiHeader.biHeight = -(int)height;
	bmi.bmiHeader.biPlanes = 1;
	bmi.bmiHeader.biCompression = BI_RGB;
	bmi.bmiHeader.biBitCount = 8;
	
	fWinAlphaDC = CreateCompatibleDC( nil );
	fWinAlphaBitmap = CreateDIBSection( fWinAlphaDC, &bmi, DIB_RGB_COLORS, (void **)&fWinAlphaBits, nil, 0 );
	SetMapMode( fWinAlphaDC, MM_TEXT );
	SetBkMode( fWinAlphaDC, TRANSPARENT );
	SetTextAlign( fWinAlphaDC, TA_TOP | TA_LEFT );

	SelectObject( fWinAlphaDC, fWinAlphaBitmap );

	return (UInt32 *)fWinRGBBits;
#endif
}

//// Detach ///////////////////////////////////////////////////////////////////
//	Release the mipmap unto itself.

void	plTextGenerator::Detach( void )
{
	if( fHost == nil )
		return;
//	hsAssert( fHost != nil, "Attempting to detach unattached host" );

	SetFont( nil, 0 );
	IDestroyOSSurface();

	fHost->Reset();
	fHost->fFlags &= ~( plMipmap::kUserOwnsBitmap | plMipmap::kDontThrowAwayImage );

	// Destroy the old texture ref, since we're no longer using it
	fHost->SetDeviceRef( nil );

	plMipmap	*oldHost = fHost;

	fHost = nil;

#ifdef MCN_DO_REFS
	// Now send ourselves a unref msg, just in case we were called directly (if this was done by 
	// message, we'll get called a few times, but that's ok, we're set up to handle that, and it
	// won't happen 'cept on destruction so the speed penalty shouldn't be a problem)
	GetKey()->Release( oldHost->GetKey() );
#endif
}

//// IDestroyOSSurface ////////////////////////////////////////////////////////
//	Opposite of allocate. DUH!

void	plTextGenerator::IDestroyOSSurface( void )
{
#if HS_BUILD_FOR_WIN32

	fHost->fImage = nil;	// DeleteObject() will get rid of it for us
	DeleteObject( fWinRGBBitmap );
	DeleteDC( fWinRGBDC );

	DeleteObject( fWinAlphaBitmap );
	DeleteDC( fWinAlphaDC );
	
#endif
}

//// ClearToColor /////////////////////////////////////////////////////////////

void	plTextGenerator::ClearToColor( hsColorRGBA &color )
{
	int		i;
	UInt32	*data = (UInt32 *)fHost->fImage;
	UInt32	hexColor = color.ToARGB32();

#if HS_BUILD_FOR_WIN32
	GdiFlush();
#endif

	for( i = 0; i < fHost->fWidth * fHost->fHeight; i++ )
		data[ i ] = hexColor;

	// Fill our alpha bitmap as well, since we use that too
#if HS_BUILD_FOR_WIN32
	memset( fWinAlphaBits, (UInt8)( color.a * 255.f ), fHost->fWidth * fHost->fHeight );
#endif
}

//// SetFont //////////////////////////////////////////////////////////////////
//	OS-specific. Load the given font for drawing the text with.

void	plTextGenerator::SetFont( const char *face, UInt16 size, hsBool antiAliasRGB )
{
#if HS_BUILD_FOR_WIN32
	if( fWinFont != nil )
	{
		DeleteObject( fWinFont );
		fWinFont = nil;
	}
	if( fWinAlphaFont != nil )
	{
		DeleteObject( fWinAlphaFont );
		fWinAlphaFont = nil;
	}

	if( face != nil )
	{
		int nHeight = -MulDiv( size, GetDeviceCaps( fWinRGBDC, LOGPIXELSY ), 72 );
		fWinFont = CreateFont( nHeight, 0, 0, 0, FW_NORMAL, FALSE, FALSE, FALSE, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS,
								CLIP_DEFAULT_PRECIS, antiAliasRGB ? ANTIALIASED_QUALITY : DEFAULT_QUALITY, VARIABLE_PITCH, face );
		hsAssert( fWinFont != nil, "Cannot create Windows font for plTextGenerator" );

		// The font for the alpha channel is identical except that it's antialiased, whereas the RGB version isn't.
		fWinAlphaFont = CreateFont( nHeight, 0, 0, 0, FW_NORMAL, FALSE, FALSE, FALSE, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS,
								CLIP_DEFAULT_PRECIS, (!antiAliasRGB) ? ANTIALIASED_QUALITY : DEFAULT_QUALITY, VARIABLE_PITCH, face );
		hsAssert( fWinAlphaFont != nil, "Cannot create Windows font for plTextGenerator" );

		SelectObject( fWinRGBDC, fWinFont );
		SelectObject( fWinAlphaDC, fWinAlphaFont );
	}
#endif
}

//// SetTextColor /////////////////////////////////////////////////////////////
//	blockRGB basically forces the RGB channel to write in blocks instead of
//	actual characters. This isn't useful unless you're relying on the alpha
//	channel to do the text (opaque text and transparent background), in which
//	case you want plenty of block color in your RGB channel because it'll get
//	alpha-ed out by the alpha channel.

void	plTextGenerator::SetTextColor( hsColorRGBA &color, hsBool blockRGB )
{
#if HS_BUILD_FOR_WIN32
	int r = (int)(color.r * 255.f);
	int g = (int)(color.g * 255.f);
	int b = (int)(color.b * 255.f);
	int a = (int)(color.a * 255.f);

	if( blockRGB )
	{
		::SetBkColor( fWinRGBDC, RGB( r, g, b ) );
		::SetBkMode( fWinRGBDC, OPAQUE );
	}
	else
		::SetBkMode( fWinRGBDC, TRANSPARENT );

	::SetTextColor( fWinRGBDC, RGB( r, g, b ) );
	::SetTextColor( fWinAlphaDC, RGB( a, a, a ) );
#endif
}

//// DrawString ///////////////////////////////////////////////////////////////

void	plTextGenerator::DrawString( UInt16 x, UInt16 y, const char *text )
{
	wchar_t *wText = hsStringToWString(text);
	DrawString(x,y,wText);
	delete [] wText;
}

void	plTextGenerator::DrawString( UInt16 x, UInt16 y, const wchar_t *text )
{
#if HS_BUILD_FOR_WIN32
	
	::TextOutW( fWinRGBDC, x, y, text, wcslen( text ) );
	::TextOutW( fWinAlphaDC, x, y, text, wcslen( text ) );

#endif
}

//// DrawClippedString ////////////////////////////////////////////////////////

void	plTextGenerator::DrawClippedString( Int16 x, Int16 y, const char *text, UInt16 width, UInt16 height )
{
	wchar_t *wText = hsStringToWString(text);
	DrawClippedString(x,y,wText,width,height);
	delete [] wText;
}

void	plTextGenerator::DrawClippedString( Int16 x, Int16 y, const wchar_t *text, UInt16 width, UInt16 height )
{
#if HS_BUILD_FOR_WIN32
	
	RECT	r;
	::SetRect( &r, x, y, x + width, y + height );

	::ExtTextOutW( fWinRGBDC, x, y, ETO_CLIPPED, &r, text, wcslen( text ), nil );
	::ExtTextOutW( fWinAlphaDC, x, y, ETO_CLIPPED, &r, text, wcslen( text ), nil );

#endif
}

//// DrawClippedString ////////////////////////////////////////////////////////

void	plTextGenerator::DrawClippedString( Int16 x, Int16 y, const char *text, UInt16 clipX, UInt16 clipY, UInt16 width, UInt16 height )
{
	wchar_t *wText = hsStringToWString(text);
	DrawClippedString(x,y,wText,clipX,clipY,width,height);
	delete [] wText;
}

void	plTextGenerator::DrawClippedString( Int16 x, Int16 y, const wchar_t *text, UInt16 clipX, UInt16 clipY, UInt16 width, UInt16 height )
{
#if HS_BUILD_FOR_WIN32
	
	RECT	r;
	::SetRect( &r, clipX, clipY, clipX + width, clipY + height );

	::ExtTextOutW( fWinRGBDC, x, y, ETO_CLIPPED, &r, text, wcslen( text ), nil );
	::ExtTextOutW( fWinAlphaDC, x, y, ETO_CLIPPED, &r, text, wcslen( text ), nil );

#endif
}

//// DrawWrappedString ////////////////////////////////////////////////////////

void	plTextGenerator::DrawWrappedString( UInt16 x, UInt16 y, const char *text, UInt16 width, UInt16 height )
{
	wchar_t *wText = hsStringToWString(text);
	DrawWrappedString(x,y,wText,width,height);
	delete [] wText;
}

void	plTextGenerator::DrawWrappedString( UInt16 x, UInt16 y, const wchar_t *text, UInt16 width, UInt16 height )
{
#if HS_BUILD_FOR_WIN32
	
	RECT	r;
	::SetRect( &r, x, y, x + width, y + height );

//	HBRUSH brush = ::CreateSolidBrush( RGB( 255, 255, 255 ) );
//	::FillRect( fWinRGBDC, &r, brush );
//	::DeleteObject( brush );
	::DrawTextW( fWinRGBDC, text, wcslen( text ), &r, 
				DT_TOP | DT_LEFT | DT_NOPREFIX | DT_WORDBREAK );
	::DrawTextW( fWinAlphaDC, text, wcslen( text ), &r, 
				DT_TOP | DT_LEFT | DT_NOPREFIX | DT_WORDBREAK );

#endif
}

//// CalcStringWidth //////////////////////////////////////////////////////////

UInt16		plTextGenerator::CalcStringWidth( const char *text, UInt16 *height )
{
	wchar_t *wText = hsStringToWString(text);
	UInt16 retVal = CalcStringWidth(wText,height);
	delete [] wText;
	return retVal;
}

UInt16		plTextGenerator::CalcStringWidth( const wchar_t *text, UInt16 *height )
{
#if HS_BUILD_FOR_WIN32

	SIZE size;
	::GetTextExtentPoint32W( fWinRGBDC, text, wcslen( text ), &size );

	if( height != nil )
		*height = (UInt16)size.cy;

	return (UInt16)size.cx;
#endif
}

//// CalcWrappedStringSize ////////////////////////////////////////////////////

void	plTextGenerator::CalcWrappedStringSize( const char *text, UInt16 *width, UInt16 *height )
{
	wchar_t *wText = hsStringToWString(text);
	CalcWrappedStringSize(wText,width,height);
	delete [] wText;
}

void	plTextGenerator::CalcWrappedStringSize( const wchar_t *text, UInt16 *width, UInt16 *height )
{
#if HS_BUILD_FOR_WIN32

	RECT	r;
	::SetRect( &r, 0, 0, *width, 0 );

	::DrawTextW( fWinRGBDC, text, wcslen( text ), &r, DT_TOP | DT_LEFT | DT_NOPREFIX | DT_WORDBREAK | DT_CALCRECT );

	*width = (UInt16)(r.right);
	if( height != nil )
		*height = (UInt16)r.bottom;
#endif
}

//// FillRect /////////////////////////////////////////////////////////////////

void	plTextGenerator::FillRect( UInt16 x, UInt16 y, UInt16 width, UInt16 height, hsColorRGBA &color )
{
#if HS_BUILD_FOR_WIN32

	RECT	rc;
	::SetRect( &rc, x, y, x + width, y + height );

	int r = (int)(color.r * 255.f);
	int g = (int)(color.g * 255.f);
	int b = (int)(color.b * 255.f);
	int a = (int)(color.a * 255.f);

	HBRUSH brush = ::CreateSolidBrush( RGB( r, g, b ) );
	::FillRect( fWinRGBDC, &rc, brush );
	::DeleteObject( brush );

	brush = ::CreateSolidBrush( RGB( a, a, a ) );
	::FillRect( fWinAlphaDC, &rc, brush );
	::DeleteObject( brush );
#endif
}

//// FrameRect ////////////////////////////////////////////////////////////////

void	plTextGenerator::FrameRect( UInt16 x, UInt16 y, UInt16 width, UInt16 height, hsColorRGBA &color )
{
#if HS_BUILD_FOR_WIN32

	RECT	rc;
	::SetRect( &rc, x, y, x + width, y + height );

	int r = (int)(color.r * 255.f);
	int g = (int)(color.g * 255.f);
	int b = (int)(color.b * 255.f);
	int a = (int)(color.a * 255.f);

	HBRUSH brush = ::CreateSolidBrush( RGB( r, g, b ) );
	::FrameRect( fWinRGBDC, &rc, brush );
	::DeleteObject( brush );

	brush = ::CreateSolidBrush( RGB( a, a, a ) );
	::FrameRect( fWinAlphaDC, &rc, brush );
	::DeleteObject( brush );
#endif
}

//// FlushToHost //////////////////////////////////////////////////////////////

void	plTextGenerator::FlushToHost( void )
{
#if HS_BUILD_FOR_WIN32
	// Flush the GDI first, to make sure it's done
	GdiFlush();

	// Now copy our alpha channel over. I hate the GDI
	UInt32		i = fHost->fWidth * fHost->fHeight;
	UInt32		*dest = fWinRGBBits;
	UInt8		*src = fWinAlphaBits;

/*	while( i-- )
	{
		*dest &= 0x00ffffff;
		*dest |= ( *src ) << 24;
//		*dest |= ( *dest << 16 ) & 0xff000000;
		dest++;
		src++;
	}
*/
	do
	{
		i--;
		dest[ i ] &= 0x00ffffff;
		dest[ i ] |= src[ i ] << 24;
	} while( i );
#endif

	// Dirty the mipmap's deviceRef, if there is one
	if( fHost->GetDeviceRef() != nil )
		fHost->GetDeviceRef()->SetDirty( true );
}

//// GetTextWidth/Height //////////////////////////////////////////////////////

UInt16	plTextGenerator::GetTextWidth( void )
{
	return ( fHost != nil ) ? (UInt16)(fHost->fWidth) : 0;
}

UInt16	plTextGenerator::GetTextHeight( void )
{
	return ( fHost != nil ) ? (UInt16)(fHost->fHeight) : 0;
}

//// GetLayerTransform ////////////////////////////////////////////////////////
//	Since the textGen can actually create a texture bigger than you were expecting,
//	you want to be able to apply a layer texture transform that will compensate. This
//	function will give you that transform. Just feed it into plLayer->SetTransform().

hsMatrix44	plTextGenerator::GetLayerTransform( void )
{
	hsMatrix44	xform;
	hsVector3	scale;

	scale.Set( (float)GetWidth() / (float)GetTextWidth(), 
			   (float)GetHeight() / (float)GetTextHeight(), 1.f );

	xform.MakeScaleMat( &scale );
	return xform;
}

//// MsgReceive ///////////////////////////////////////////////////////////////

hsBool	plTextGenerator::MsgReceive( plMessage *msg )
{
#ifdef MCN_DO_REFS
	plGenRefMsg	*refMsg = plGenRefMsg::ConvertNoRef( msg );
	if( refMsg != nil )
	{
		if( refMsg->GetContext() & ( plRefMsg::kOnCreate | plRefMsg::kOnRequest ) )
		{
			// Don't do anything--already did an attach
		}
		else if( refMsg->GetContext() & ( plRefMsg::kOnDestroy | plRefMsg::kOnRemove ) )
		{
			Detach();
		}
		return true;
	}
#endif

	return hsKeyedObject::MsgReceive( msg );
}