作者：龍飛
注意：請使用支持中文的TTF字庫。
5.1：構建可以正確顯示中文的SDL_ttf函數
世界終于又充滿了光明！任何事情都是有答案的，不知道僅僅是因為我們還沒有找到。解決了以上一系列問題，我們終于可以不依賴MFC，完全使用自由開源的資源，讓SDL顯示中文了！我們通過TTF_RenderUNICODE_Xxx()來構建這些函數：
//FileName: font.h
#ifndef FONT_H_
#define FONT_H_
#include "gb2312_to_Unicode.h"
#include "SDL/SDL_ttf.h"
SDL_Surface* myTTF_RenderString_Blended(TTF_Font* font, const std::string& str, SDL_Color fg);
SDL_Surface* myTTF_RenderString_Solid(TTF_Font* font, const std::string& str, SDL_Color fg);
SDL_Surface* myTTF_RenderString_Shaded(TTF_Font* font, const std::string& str, SDL_Color fg, SDL_Color bg);
#endif
三種顯示模式的實現文件：
#include "font.h"
SDL_Surface* myTTF_RenderString_Blended(TTF_Font* font, const std::string& str, SDL_Color fg)
{
SDL_Surface* textbuf;
//Get Unicode
std::vector<Uint16> unicodeUnit = getUnicode(str);
int arraySize = unicodeUnit.size();
Uint16* perOne = new Uint16[arraySize+1];
for ( int i = 0; i < arraySize; i++ )
perOne[i] = unicodeUnit[i];
perOne[arraySize] = 0;
//Render the new text
textbuf = TTF_RenderUNICODE_Blended(font, perOne, fg);
//Free the text buffer and return
delete [] perOne;
return textbuf;
}
SDL_Surface* myTTF_RenderString_Solid(TTF_Font* font, const std::string& str, SDL_Color fg)
{
SDL_Surface* textbuf;
//Get Unicode
std::vector<Uint16> unicodeUnit = getUnicode(str);
int arraySize = unicodeUnit.size();
Uint16* perOne = new Uint16[arraySize+1];
for ( int i = 0; i < arraySize; i++ )
perOne[i] = unicodeUnit[i];
perOne[arraySize] = 0;
//Render the new text
textbuf = TTF_RenderUNICODE_Solid(font, perOne, fg);
//Free the text buffer and return
delete [] perOne;
return textbuf;
}
SDL_Surface* myTTF_RenderString_Shaded(TTF_Font* font, const std::string& str, SDL_Color fg, SDL_Color bg)
{
SDL_Surface* textbuf;
//Get Unicode
std::vector<Uint16> unicodeUnit = getUnicode(str);
int arraySize = unicodeUnit.size();
Uint16* perOne = new Uint16[arraySize+1];
for ( int i = 0; i < arraySize; i++ )
perOne[i] = unicodeUnit[i];
perOne[arraySize] = 0;
//Render the new text
textbuf = TTF_RenderUNICODE_Shaded(font, perOne, fg, bg);
//Free the text buffer and return
delete [] perOne;
return textbuf;
}
5.2：修改DisplaySurface的類方法
其它接口都是不需要改動的，我們僅僅把類方法中，原來用于構建文本面的函數換成我們自己的函數就可以了。當然，先把這些函數#include進來：
#include "SurfaceClass.h"
#include "font.h"
//
DisplaySurface::DisplaySurface(const std::string& msg_name, const std::string& message, const ScreenSurface& screen,
Uint8 r, Uint8 g , Uint8 b,
int ttf_size, const std::string& ttf_fileName):
fileName(msg_name)
{
if ( textNum == 0 )
if ( TTF_Init() < 0 )
throw ErrorInfo("TTF_Init() failed!");
SDL_Color textColor;
textColor.r = r;
textColor.g = g;
textColor.b = b;
pFont = TTF_OpenFont(ttf_fileName.c_str(), ttf_size);
if ( pFont == 0 )
throw ErrorInfo("TTF_OpenFont() failed!");
pSurface = myTTF_RenderString_Blended(pFont, message, textColor);
if ( pSurface == 0 )
throw ErrorInfo("myTTF_RenderString_Blended() failed!");
pScreen = screen.point();
textNum++;
}
5.3：StringData在主程序中的調用
最后，我們演示一下StringData在主程序中的調用方法。
//must #include "string_data.h"
//Load a textSurface
StringData myData;
const std::string uInfo = myData[0];
const std::string dInfo = myData[1];
const std::string lInfo = myData[2];
const std::string rInfo = myData[3];
const std::string oInfo = myData[4];
TextSurface upMessage("upMsg", uInfo, screen);
TextSurface downMessage("downMsg", dInfo, screen, 0xFF, 0, 0);
TextSurface leftMessage("leftMsg", lInfo, screen, 0, 0xFF, 0);
TextSurface rightMessage("rightMsg", rInfo, screen, 0, 0, 0xFF);
TextSurface otherMessage("otherMsg", oInfo, screen, 100, 100, 100, 35);
嘿嘿，就這么簡單！
5.4：本章演示程序和完整源代碼下載
包含SDL顯示中文的演示程序（win32）以及完整的源代碼。
http://www.fs2you.com/zh-cn/files/62f0acf0-ff11-11dc-a4f4-0014221b798a/
posted on 2008-03-31 11:59
lf426 閱讀(8350)
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