fonttexture.cpp

3D游戏展示程序

//--------------------------------------------------
//  Desc: Font Texture 512*32
//  Author: artsylee/2006.11.02
//--------------------------------------------------
#include "../stdafx.h"
#include "FontTexture.h"
#include "Log.h"

CFontTexture::CFontTexture()
{
	m_bEmpty = true;
	m_bInit = false;
	m_Width = FONT_TEXTURE_WIDTH;
	m_Height = FONT_TEXTURE_HEIGHT;
}

//---------------------------------------------------
// 创建字体纹理
//---------------------------------------------------
void CFontTexture::CreateFontTexture(int width, int height)
{
	CTexture::CreateTexture(width, height, D3DFMT_A4R4G4B4);
}

CFontTexture::~CFontTexture()
{
	Release();
}

void CFontTexture::Release()
{
	// Destroy(); virtual function destroy
	DeleteObject(m_BmpInfo.m_hDC);
	DeleteObject(m_BmpInfo.m_hBitMap);
	m_bInit = false;
	Clear();
}

//---------------------------------------------------
// 输出文字到纹理
//---------------------------------------------------
void CFontTexture::WriteString(const char *szText, HFONT hFont)
{
	if(szText == NULL || szText[0] == '\0')
	{
		return;
	}
	if(!m_bInit)
	{
		BITMAPINFO bmi;
		ZeroMemory(&bmi.bmiHeader,  sizeof(BITMAPINFOHEADER));
		bmi.bmiHeader.biSize        = sizeof(BITMAPINFOHEADER);
		bmi.bmiHeader.biWidth       =  (int)m_Width;
		bmi.bmiHeader.biHeight      = -(int)m_Height;
		bmi.bmiHeader.biPlanes      = 1;
		bmi.bmiHeader.biCompression = BI_RGB;
		bmi.bmiHeader.biBitCount    = 32;

		m_BmpInfo.m_hDC = CreateCompatibleDC(NULL);
		m_BmpInfo.m_hBitMap	= CreateDIBSection(m_BmpInfo.m_hDC, &bmi, DIB_RGB_COLORS, 
			(void **)&m_BmpInfo.m_pData, NULL, 0);
		if(m_BmpInfo.m_pData==NULL)
		{
			WriteLog(INFO_ERROR, "Can't create font bitmap!");
		}
		m_bInit = true;
	}

	memset(m_BmpInfo.m_pData, 0, sizeof(DWORD)*m_Width*m_Height);

	HBITMAP OldBitmap=(HBITMAP)SelectObject(m_BmpInfo.m_hDC, m_BmpInfo.m_hBitMap);
	HFONT OldFont=(HFONT)SelectObject(m_BmpInfo.m_hDC, hFont);

	SetMapMode(m_BmpInfo.m_hDC, MM_TEXT);
	SetTextColor(m_BmpInfo.m_hDC, RGB(255,255,255));
	SetBkColor(m_BmpInfo.m_hDC, 0x00000000);
	SetTextAlign(m_BmpInfo.m_hDC, TA_TOP);

	int len = strlen(szText);
	::TextOut(m_BmpInfo.m_hDC, 0, 0, szText, strlen(szText));
	//RECT	rtPos = { 0, 0, FONT_TEXTURE_WIDTH, FONT_TEXTURE_HEIGHT };
	//::DrawText(m_BmpInfo.m_hDC, szText, len, &rtPos, DT_SINGLELINE | DT_NOPREFIX);

	int count = 0;
	int total = m_Width * m_Height;

	D3DLOCKED_RECT d3dlr;
	m_pTexture->LockRect(0, &d3dlr, 0, 0);
	WORD *pASMDst = (WORD *)d3dlr.pBits;
	DWORD *pBitmapBits = (DWORD *)m_BmpInfo.m_pData;

	__asm
	{
		push	esi
			push	edi

			mov		esi, pBitmapBits	
			mov		edi, pASMDst
loop1:	
		lodsd
			cmp		eax, 0
			jz		zero
			mov		eax, 0x0000ffff
zero:
		stosw
			inc		count
			mov		eax, count
			cmp		eax, total
			jnz		loop1

			pop		edi
			pop		esi
	};

	m_pTexture->UnlockRect(0);

	SelectObject(m_BmpInfo.m_hDC, OldBitmap);
	SelectObject(m_BmpInfo.m_hDC, OldFont);

	m_szText = szText;
	m_bEmpty = false;
}

void CFontTexture::Clear()
{
	m_szText	= "";
	m_bEmpty	= true;
}

bool CFontTexture::Compare(const char *szText) const
{
	return m_szText == szText;
}

bool CFontTexture::IsEmpty() const
{
	return m_bEmpty;
}