分类： C/C++
2009-01-08 23:41:51
#include
#include
#include
#include
#include "gl\glu.h"
#include "glut.h"
#include
#include
#include
#include
#include
//#pragma comment(lib , "lib/glut32.lib")
#pragma comment(lib , "lib/freetype2110.lib")
//opengl32.lib glu32.lib glaux.lib freetype235_D.lib odbc32.lib odbccp32.lib
#define MAX_NO_TEXTURES 1
#define CUBE_TEXTURE 0
GLuint texture_id[MAX_NO_TEXTURES];
struct xCharTexture
{
GLuint m_texID;
wchar_t m_chaID;
int m_Width;
int m_Height;
int m_adv_x;
int m_adv_y;
int m_delta_x;
int m_delta_y;
public:
xCharTexture()
{
m_texID = 0;
m_chaID = 0;
m_Width = 0;
m_Height = 0;
}
}g_TexID[65536];
class xFreeTypeLib
{
FT_Library m_FT2Lib;
FT_Face m_FT_Face;
public:
int m_w;
int m_h;
void load(const char* font_file , int _w , int _h);
GLuint loadChar(wchar_t ch);
};
void xFreeTypeLib::load(const char* font_file , int _w , int _h)
{
FT_Library library;
if (FT_Init_FreeType( &library) )
exit(0);
//加载一个字体,取默认的Face,一般为Regualer
if (FT_New_Face( library, font_file, 0, &m_FT_Face ))
exit(0);
FT_Select_Charmap(m_FT_Face, FT_ENCODING_UNICODE);
m_w = _w ; m_h = _h;
m_FT_Face->num_fixed_sizes;
//大小要乘64.这是规定。照做就可以了。
//FT_Set_Char_Size( m_FT_Face , 0 , m_w << 6, 96, 96);
FT_Set_Pixel_Sizes(m_FT_Face,m_w, m_h);
}
GLuint xFreeTypeLib::loadChar(wchar_t ch)
{
if(g_TexID[ch].m_texID)
return g_TexID[ch].m_texID;
if(FT_Load_Char(m_FT_Face, ch, /*FT_LOAD_RENDER|*/FT_LOAD_FORCE_AUTOHINT|
(TRUE ? FT_LOAD_TARGET_NORMAL : FT_LOAD_MONOCHROME | FT_LOAD_TARGET_MONO) ) )
{
return 0;
}
/*if(FT_Load_Glyph( m_FT_Face, FT_Get_Char_Index( m_FT_Face, ch ), FT_LOAD_FORCE_AUTOHINT ))
throw std::runtime_error("FT_Load_Glyph failed");*/
xCharTexture& charTex = g_TexID[ch];
//得到字模
FT_Glyph glyph;
if(FT_Get_Glyph( m_FT_Face->glyph, &glyph ))
return 0;
//转化成位图
FT_Render_Glyph( m_FT_Face->glyph, FT_RENDER_MODE_LCD );//FT_RENDER_MODE_NORMAL );
FT_Glyph_To_Bitmap( &glyph, ft_render_mode_normal, 0, 1 );
FT_BitmapGlyph bitmap_glyph = (FT_BitmapGlyph)glyph;
//取道位图数据
FT_Bitmap& bitmap=bitmap_glyph->bitmap;
//把位图数据拷贝自己定义的数据区里.这样旧可以画到需要的东西上面了。
int width = bitmap.width;
int height = bitmap.rows;
m_FT_Face->size->metrics.y_ppem;
m_FT_Face->glyph->metrics.horiAdvance;
charTex.m_Width = width;
charTex.m_Height = height;
charTex.m_adv_x = m_FT_Face->glyph->advance.x / 64.0f;
charTex.m_adv_y = m_FT_Face->size->metrics.y_ppem; //m_FT_Face->glyph->metrics.horiBearingY / 64.0f;
charTex.m_delta_x = (float)bitmap_glyph->left;
charTex.m_delta_y = (float)bitmap_glyph->top - height;
glGenTextures(1,&charTex.m_texID);
glBindTexture(GL_TEXTURE_2D,charTex.m_texID);
char* pBuf = new char[width * height * 4];
for(int j=0; j < height ; j++)
{
for(int i=0; i < width; i++)
{
unsigned char _vl = (i>=bitmap.width || j>=bitmap.rows) ? 0 : bitmap.buffer[i + bitmap.width*j];
pBuf[(4*i + (height - j - 1) * width * 4) ] = 0xFF;
pBuf[(4*i + (height - j - 1) * width * 4)+1] = 0xFF;
pBuf[(4*i + (height - j - 1) * width * 4)+2] = 0xFF;
pBuf[(4*i + (height - j - 1) * width * 4)+3] = _vl;
}
}
glTexImage2D( GL_TEXTURE_2D,0,GL_RGBA,width, height,0,GL_RGBA,GL_UNSIGNED_BYTE,pBuf);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
glTexEnvi(GL_TEXTURE_2D,GL_TEXTURE_ENV_MODE,GL_REPLACE);
/*gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA, width, height, GL_RGBA, GL_UNSIGNED_BYTE, pBuf);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
glTexEnvi(GL_TEXTURE_2D,GL_TEXTURE_ENV_MODE,GL_REPLACE);*/
delete[] pBuf;
return charTex.m_chaID;
}
xFreeTypeLib g_FreeTypeLib;
float ratio;
xCharTexture* getTextChar(wchar_t ch)
{
g_FreeTypeLib.loadChar(ch);
return &g_TexID[ch];
}
LPWSTR AnsiToUnicode(LPCSTR lpcstr) //参数lpcstr类型也可是char*
{
LPWSTR Pwstr;
int i;
i=MultiByteToWideChar(CP_ACP,0,lpcstr,-1,NULL,0);
Pwstr=new WCHAR[i];
MultiByteToWideChar(CP_ACP,0,lpcstr,-1,Pwstr,i);
return (Pwstr);
}
//wchar_t g_UnicodeString[]=L"aaabb\x4E2D\x6587\x0031\x0032\x0033";
const char g_UnicodeString[]="aaa VB文件格式：\n\
若不明确就标为未知\n\
表演者： 若不明确就标为未知\n\
专辑： 若不明确就标为未知\n\
持续时间：01:01:00超过1小时；\n\
09:09不足小时；00:09不足1分钟\n\
glBindTexture(GL_TEXTURE_2D,pCharTex->m_texID);\n\
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );\n\
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );\n\
glEnable(GL_BLEND);\n\
glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA)" ;
void drawText(wchar_t* _strText,int x , int y, int maxW , int h)
{
int sx = x;
int sy = y;
int maxH = h;
size_t nLen = wcslen(_strText);
for(int i = 0 ; i
if(_strText[i] =='\n')
{
sx = x ; sy += maxH + 12;
continue;
}
xCharTexture* pCharTex = getTextChar(_strText[i]);
glBindTexture(GL_TEXTURE_2D,pCharTex->m_texID);
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
//glDisable(GL_TEXTURE_2D);
int w = pCharTex->m_Width;
int h = pCharTex->m_Height;
int ch_x = sx + pCharTex->m_delta_x;
int ch_y = sy - h - pCharTex->m_delta_y;
if(maxH < h) maxH = h;
glBegin ( GL_QUADS );
{
glTexCoord2f(0.0f, 1.0f); glVertex3f(ch_x , ch_y , 1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f(ch_x + w, ch_y , 1.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f(ch_x + w, ch_y + h, 1.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f(ch_x , ch_y + h, 1.0f);
}
glEnd();
sx += pCharTex->m_adv_x;
if(sx > x + maxW)
{
sx = x ; sy += maxH + 12;
}
}
}
void init(void)
{
glShadeModel(GL_SMOOTH|GL_FLAT); // Enable Smooth Shading
glClearColor(0.0f, 0.0f, 0.0f, 0.5f); // Black Background
glEnable ( GL_COLOR_MATERIAL_FACE );
glColorMaterial ( GL_FRONT, GL_AMBIENT_AND_DIFFUSE );
//g_FreeTypeLib.load("simhei.ttf",14,14);
// g_FreeTypeLib.load("c:\\windows\\fonts\\simhei.ttf",14,14);
g_FreeTypeLib.load("c:\\windows\\fonts\\simhei.ttf",12,12);
glDisable ( GL_CULL_FACE );
//glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
}
void reshape( int w, int h )
{
// Prevent a divide by zero, when window is too short
// (you cant make a window of zero width).
if(h == 0)
h = 1;
ratio = 1.0f * w / h;
// Reset the coordinate system before modifying
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
// Set the viewport to be the entire window
glViewport(0, 0, w, h);
glOrtho(0,w,h,0,-100,200);
// Set the clipping volume
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(0, 0, 30 ,0 , 0 ,10 , 0.0f , 1.0f , 0.0f);
}
void display( void )
{
glClearColor(0.0f , 0.0f , 0.6f , 1.0f);
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
/*glLoadIdentity ( );
glPushMatrix();
glTranslatef ( 0.0, 0.0, -5.0 );
*/
glEnable ( GL_TEXTURE_2D );
wchar_t *wstr = AnsiToUnicode(g_UnicodeString);
drawText(wstr, 50, 50, 900,25);
//glPopMatrix();
glutSwapBuffers();
}
void keyboard ( unsigned char key, int x, int y ) // Create Keyboard Function
{
switch ( key ) {
case 27: // When Escape Is Pressed...
exit ( 0 ); // Exit The Program
break; // Ready For Next Case
default: // Now Wrap It Up
break;
}
}
void arrow_keys ( int a_keys, int x, int y ) // Create Special Function (required for arrow keys)
{
switch ( a_keys ) {
case GLUT_KEY_UP: // When Up Arrow Is Pressed...
glutFullScreen ( ); // Go Into Full Screen Mode
break;
case GLUT_KEY_DOWN: // When Down Arrow Is Pressed...
glutReshapeWindow ( 900, 500 ); // Go Into A 500 By 500 Window
break;
default:
break;
}
}
using namespace std;
int main ( int argc, char** argv ) // Create Main Function For Bringing It All Together
{
// ANSI 字符串，内容长度 7 字节
char sz[20] = "中文123";
// UNICODE 字符串，内容长度 5 个 wchar_t（10 字节）
wchar_t wsz[20] = L"\x4E2D\x6587\x0031\x0032\x0033";
// 运行时设定当前 ANSI 编码，VC 格式
setlocale(LC_ALL, ".936");
// GCC 中格式
setlocale(LC_ALL, "zh_CN.GBK");
// Visual C++ 中使用小写 %s，按照 setlocale 指定编码输出到文件
// GCC 中使用大写 %S
// 把 UNICODE 字符串按照 setlocale 指定的编码转换成字节
wcstombs(sz, wsz, 20);
// 把字节串按照 setlocale 指定的编码转换成 UNICODE 字符串
mbstowcs(wsz, sz, 20);
glutInit ( &argc, argv ); // Erm Just Write It =)
glutInitDisplayMode ( GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA ); // Display Mode
glutInitWindowPosition (0,0);
glutInitWindowSize ( 900, 500 ); // If glutFullScreen wasn't called this is the window size
glutCreateWindow ( "NeHe Lesson 6- Ported by Rustad" ); // Window Title (argv[0] for current directory as title)
init ();
//glutFullScreen ( ); // Put Into Full Screen
glutDisplayFunc ( display ); // Matching Earlier Functions To Their Counterparts
glutReshapeFunc ( reshape );
glutKeyboardFunc ( keyboard );
glutSpecialFunc ( arrow_keys );
glutIdleFunc ( display );
glutMainLoop ( ); // Initialize The Main Loop
return 1;
}
