发信人: lanhaitao (蓝天－大海－波涛－你和我), 信区: VR_3D       
标  题: OpenGL中汉字显示方法例程
发信站: BBS 水木清华站 (Fri Feb 11 14:06:04 2000)

//编译好马上、就可以显示！

#include <windows.h>
#include <GL/gl.h>
#include <GL/glaux.h>
#pragma warning(disable:4244)
void myinit(void);
void makeStringFont(char *);
void printString(void);
void CALLBACK myReshape(GLsizei w, GLsizei h);
void CALLBACK display(void);
#define CHN_TEXT_LIST 1
void getBitmap(BITMAP *bmp, LONG width, LONG height)
{
   FillMemory(bmp, sizeof(*bmp), 0);
   bmp->bmWidth = width;
   bmp->bmHeight = height;
   bmp->bmWidthBytes = ((width + 7) / 8 + 1) & (~1);
   bmp->bmPlanes = 1;
   bmp->bmBitsPixel = 1;
   bmp->bmBits = GlobalAlloc(GMEM_FIXED, bmp->bmWidthBytes*height);
}
unsigned char *getGLmonoBits(HDC hDC, HBITMAP hBmp, int* size)
{
   BITMAP bi;
   unsigned char   *bits;
   struct {
       BITMAPINFOHEADER bih;
       RGBQUAD col[2];
   }bic;
   BITMAPINFO *binf = (BITMAPINFO *)&bic;
   GetObject(hBmp, sizeof(bi), &bi);
   *size = bi.bmHeight*(((bi.bmWidth + 31) & (~31)) / 8);
   bits = (unsigned char *)GlobalAlloc(GPTR, *size);
   binf->bmiHeader.biSize = sizeof(binf->bmiHeader);
   binf->bmiHeader.biWidth = bi.bmWidth;
   binf->bmiHeader.biHeight = bi.bmHeight;
   binf->bmiHeader.biPlanes = 1;
   binf->bmiHeader.biBitCount = 1;
   binf->bmiHeader.biCompression = BI_RGB;
   binf->bmiHeader.biSizeImage = *size;
   binf->bmiHeader.biXPelsPerMeter = 1;
   binf->bmiHeader.biYPelsPerMeter = 1;
   binf->bmiHeader.biClrUsed = 0;
   binf->bmiHeader.biClrImportant = 0;
   GetDIBits(hDC, hBmp, 0, bi.bmHeight, bits, binf, DIB_RGB_COLORS);
   return bits;
}
unsigned char *createStringBitmapFont(HDC hDC, HFONT hFont, char *str, PSIZE
L size)
{
   BITMAP  bmp;
   HBITMAP hbmp;
   unsigned char    *pbm;
   int     len = lstrlen(str);
   HFONT   hFontOld = SelectObject(hDC, hFont);
   GetTextExtentPoint32(hDC, str, len, size);
   getBitmap(&bmp, size->cx, size->cy);
   hbmp = CreateBitmapIndirect(&bmp);
   GlobalFree(bmp.bmBits);
   if(hbmp){
       HDC hMemDC = CreateCompatibleDC(hDC);
       if(hMemDC){
           HBITMAP hPrevBmp = SelectObject(hMemDC, hbmp);
           HFONT   hPrevFont;
           int     size0;
           BITMAP  bi;
           SetBkColor(hMemDC, RGB(0,0,0));
           SetTextColor(hMemDC, RGB(255,255,255));
           SetBkMode(hMemDC, OPAQUE);
           hPrevFont = SelectObject(hMemDC, hFont);
           TextOut(hMemDC, 0, 0, str, len);
           GetObject(hbmp, sizeof(bi), &bi);
           pbm =getGLmonoBits(hMemDC, hbmp, &size0);
           size->cx = ((bi.bmWidth+31)&(~31));
           size->cy = bi.bmHeight;
           SelectObject(hMemDC, hPrevFont);
           SelectObject(hMemDC, hPrevBmp);
           DeleteDC(hMemDC);
       }
       else{
           DeleteObject(hbmp);
       }
   }
   SelectObject(hDC, hFontOld);
   return pbm;
}
void makeStringFont(char *str)
{
   SIZE    size;
   LOGFONT lf;
   HFONT   hFont;
   unsigned char *lpBitmap;
   HDC     hDC = GetDC(GetFocus());
   FillMemory(&lf, sizeof(lf), 0);
   lf.lfHeight = 20* GetDeviceCaps(hDC, LOGPIXELSY) / 70;
   lf.lfCharSet = GB2312_CHARSET;
   lf.lfWeight = 1;
   lf.lfOutPrecision = OUT_STROKE_PRECIS;
   lf.lfClipPrecision = CLIP_CHARACTER_PRECIS;
   lstrcpy(lf.lfFaceName, "");
   hFont = CreateFontIndirect(&lf);
   lpBitmap = createStringBitmapFont(hDC, hFont, str, &size);
   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
   glBitmap(size.cx, size.cy, 0.0, 2.0, size.cx+2, 0.0, lpBitmap);
   GlobalFree(lpBitmap);
}
void CALLBACK display(void)
{
   glClear(GL_COLOR_BUFFER_BIT);
   glRasterPos2i(50, 150);
makeStringFont("这就是汉字!");
glRasterPos2i(50, 100);
makeStringFont("你不识汉字?");
glRasterPos2i(50, 50);
makeStringFont("靠!!我服了你!");
glFlush();
}
void CALLBACK myReshape(GLsizei w, GLsizei h)
{
   glViewport(0, 0, w, h);
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
   glOrtho (0.0, w, 0.0, h, -1.0, 1.0);
   glMatrixMode(GL_MODELVIEW);
}
int APIENTRY WinMain(HINSTANCE hInstance,
                    HINSTANCE hPrevInstance,
                    LPSTR     lpCmdLine,
                    int       nCmdShow)
{
   auxInitDisplayMode (AUX_SINGLE | AUX_RGB);
   auxInitPosition (0, 0, 400,200);
   auxInitWindow ("Chinese Text");
 glShadeModel (GL_FLAT);
   auxReshapeFunc (myReshape);
   auxMainLoop(display);
   return(0);
}

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