deargui-vpl/ref/virtools/Samples/Behaviors/Interface/Sources/CKBitmapFont.cpp

#include "CKAll.h"
#include "CKBitmapFont.h"
//#include <fstream.h>


CKBitmapFont::CKBitmapFont():m_FontBitmap(0),m_Height(0)
{
	int i;
	for(i=0;i<256;i++) {
		m_CorrespondanceTable[i].pos=-1;
		m_CorrespondanceTable[i].width=0;
	}
}


DWORD 
readPixel(BYTE* data,int bpp) 
{
	DWORD col;
	switch(bpp) {
	case 1:
		col = *data;
		break;
	case 2:
		col = *(WORD*)data;
		break;
	case 3:
		col = *(DWORD*)data;
		col&=0x00FFFFFF;
		break;
	case 4:
		col = *(DWORD*)data;
		break;
	}
	return col;
}

void
verticalLine(BYTE* data,DWORD col,int bpp,int pitch,int height) 
{
	int i;
	for(i=0;i<height;i++) {
		switch(bpp) {
		case 1:
			*data = (BYTE)col;
			break;
		case 2:
			*(WORD*)data = (WORD)col;
			break;
		case 3:
			memcpy(data,&col,bpp);
			break;
		case 4:
			*(DWORD*)data = col;
			break;
		}
		data+=pitch;
	}
}

void
VerticalLine(CKSprite* sprite,int x,int height,DWORD col) 
{
	int i;
	for(i=0;i<height;i++) {
		sprite->SetPixel(x,i,col);
	}
}


int
CKBitmapFont::CreateFont(CK_ID sprite, CKContext *ctx)
{
	m_FontBitmap = sprite;
	CKSprite* fontBitmap = (CKSprite*)ctx->GetObject(sprite); 
	if(!fontBitmap) return 0;

	fontBitmap->GetCKContext()->OutputToConsole("Creating Font");

	// We get the height
	m_Height=fontBitmap->GetHeight();

	//We get the width
	int width  = fontBitmap->GetWidth();

	int x = 0;

	// First we must find the separating color
	DWORD col;
	m_SeparationColor = fontBitmap->GetPixel(x++,0);

	// it should be the space character there, so we take this color as color key...
	m_FillColor = fontBitmap->GetPixel(x,0);	

	// If the 2 colors are the same, the font is invalid
	if(m_SeparationColor == m_FillColor) {
		m_FontBitmap = 0;
		ctx->OutputToConsole("Wrong Bitmap Font");
		return 0;
	}

	// read all letters
	int pos=1;
	int cw;
	int i;
	for(i=32;i<'~'+1;i++) {
		// we advance till we found the other separator
		cw = -1;
		do {
			col = fontBitmap->GetPixel(x++,0);
			cw++;
		} while( col != m_SeparationColor);
		m_CorrespondanceTable[i].width=cw;
		m_CorrespondanceTable[i].pos=pos;
		pos+=(cw+1);
		if(pos>=width) break;
	}

	return 1;
}

CKBitmapFont::~CKBitmapFont()
{
}

void 
CKBitmapFont::MaskSeparationLines(CKBOOL mask, CKContext *ctx)
{
	// We test if there is a font attached
	CKSprite* fontBitmap = (CKSprite*)ctx->GetObject(m_FontBitmap); 
	if(!fontBitmap) return;

	DWORD col = 0;

	if(mask) { //we write these lines in black
		col = m_FillColor;
	} else { //we write these lines in separation color
		col = m_SeparationColor;
	}

	int i;
	for(i=32;i<'~'+1;i++) {
		VerticalLine(fontBitmap,m_CorrespondanceTable[i].pos-1,m_Height,col);
	}
}


int
CKBitmapFont::DrawCharacter(CKRenderContext* context,int i,int x,int y,Vx2DVector& scale)
{
	if(m_CorrespondanceTable[i].pos!=-1) {
		CKSprite* fontBitmap = (CKSprite*)context->GetCKContext()->GetObject(m_FontBitmap);
		if(!fontBitmap) return 0;
		VxRect srcrect;
		srcrect.left = (float)m_CorrespondanceTable[i].pos;
		srcrect.top = 0;
		srcrect.right = srcrect.left+m_CorrespondanceTable[i].width;
		srcrect.bottom = (float)m_Height;
		VxRect rect;
		rect.left	= (float)x;
		rect.top	= (float)y;
		rect.right	= (float)(x+(int)(m_CorrespondanceTable[i].width*scale.x));
		rect.bottom = (float)(y+(int)((m_Height)*scale.y));
		fontBitmap->SetSourceRect(srcrect);
		fontBitmap->SetRect(rect);
		fontBitmap->Render(context);
		return m_CorrespondanceTable[i].width;
	}
	return 0;
}


void
CKBitmapFont::DrawString(CKRenderContext* context,char* str,int x,int y,int s,Vx2DVector& scale)
{
	CKSprite* fontBitmap = (CKSprite*)context->GetCKContext()->GetObject(m_FontBitmap);
	if(!fontBitmap) return;

	fontBitmap->UseSourceRect(TRUE);
	fontBitmap->Show(CKSHOW);

	while(*str!='\0') {
		x+=(int)(scale.x*DrawCharacter(context,*str,x,y,scale));
		x+=(int)(scale.x*s);
		++str;
	}

	fontBitmap->UseSourceRect(FALSE);
	fontBitmap->Show(CKHIDE);
	VxRect rect;
	rect.left = 0;
	rect.top = 0;
	rect.right = (float)fontBitmap->GetWidth();
	rect.bottom = (float)fontBitmap->GetHeight();
	fontBitmap->SetRect(rect);
}



int
CKBitmapFont::StringWidth(char* str,int s,Vx2DVector& scale)
{
	int x=0;
	while(*str!='\0') {
		x+=(int)(scale.x*m_CorrespondanceTable[*str].width);
		x+=(int)(scale.x*s);
		str++;
	}

	return x;
}