font.cpp
上传用户:qccn516
上传日期:2013-05-02
资源大小:3382k
文件大小:5k
- /* Font
- *
- * Copyright (C) 2003-2004, Alexander Zaprjagaev <frustum@frustum.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #include <stdio.h>
- #include <stdarg.h>
- #include "texture.h"
- #include "font.h"
- #include "font_data.h"
- Font::Font() {
-
- int width = 256;
- int height = 256;
- unsigned char *data = new unsigned char[width * height];
-
- for(int i = 0, j = 0; i < width * height; i++) {
- if(font_data_rle[j] == font_data_rle[j + 1]) {
- int n = font_data_rle[j + 2];
- for(int k = 0; k < n + 2; k++) data[i++] = (unsigned char)font_data_rle[j];
- i -= 1;
- j += 3;
- } else {
- data[i] = (unsigned char)font_data_rle[j++];
- }
- }
-
- glGenTextures(1,&tex_id);
- glBindTexture(GL_TEXTURE_2D,tex_id);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP);
- glTexImage2D(GL_TEXTURE_2D,0,GL_LUMINANCE,width,height,0,GL_LUMINANCE,GL_UNSIGNED_BYTE,data);
-
- int size = width;
- step = size / 16;
- for(int y = 0, i = 0; y < 16; y++) {
- for(int x = 0; x < 16; x++, i++) {
- unsigned char *ptr;
- space[i][0] = 0;
- for(int j = 0; j < step; j++) {
- ptr = data + size * y * step + x * step + j;
- int k;
- for(k = 0; k < step; k++) {
- if(*ptr != 0) break;
- ptr += size;
- }
- if(k != step) break;
- space[i][0]++;
- }
- space[i][1] = 0;
- if(space[i][0] == step) continue;
- for(int j = step - 1; j >= 0; j--) {
- ptr = data + size * y * step + x * step + j;
- int k;
- for(k = 0; k < step; k++) {
- if(*ptr != 0) break;
- ptr += size;
- }
- if(k != step) break;
- space[i][1]++;
- }
- space[i][1] = step - space[i][0] - space[i][1];
- }
- }
- delete data;
-
- list_id = glGenLists(256);
- for(int y = 0, i = 0; y < 16; y++) {
- for(int x = 0; x < 16; x++, i++) {
- float s = (float)x / 16.0f + (float)space[i][0] / (float)size;
- float t = (float)y / 16.0f;
- float ds = (float)space[i][1] / (float)size;
- float dt = 1.0 / 16.0;
- glNewList(list_id + i,GL_COMPILE);
- glBegin(GL_QUADS);
- glTexCoord2f(s,t);
- glVertex2i(0,0);
- glTexCoord2f(s,t + dt);
- glVertex2i(0,step);
- glTexCoord2f(s + ds,t + dt);
- glVertex2i(space[i][1],step);
- glTexCoord2f(s + ds,t);
- glVertex2i(space[i][1],0);
- glEnd();
- glTranslatef(space[i][1],0,0);
- glEndList();
- }
- }
- }
- Font::~Font() {
- glDeleteTextures(1,&tex_id);
- glDeleteLists(256,list_id);
- }
- /*
- */
- void Font::enable(int w,int h) {
- width = w;
- height = h;
- glGetFloatv(GL_PROJECTION_MATRIX,projection);
- glGetFloatv(GL_MODELVIEW_MATRIX,modelview);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(0,width,height,0,-1,1);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glDisable(GL_DEPTH_TEST);
- glDepthMask(GL_FALSE);
- glEnable(GL_BLEND);
- glEnable(GL_TEXTURE_2D);
- glBindTexture(GL_TEXTURE_2D,tex_id);
- }
- void Font::disable() {
- glDisable(GL_TEXTURE_2D);
- glDisable(GL_BLEND);
- glDepthMask(GL_TRUE);
- glEnable(GL_DEPTH_TEST);
- glMatrixMode(GL_PROJECTION);
- glLoadMatrixf(projection);
- glMatrixMode(GL_MODELVIEW);
- glLoadMatrixf(modelview);
- }
- /*
- */
- void Font::puts(float x,float y,const char *str) {
- for(int i = 0; i < 2; i++) {
- if(i == 0) glBlendFunc(GL_ZERO,GL_ONE_MINUS_SRC_COLOR);
- else glBlendFunc(GL_ONE,GL_ONE);
- glPushMatrix();
- glTranslatef(x,y,0);
- char *s = (char*)str;
- for(int lines = 0; *s; s++) {
- if(*s == 'n') {
- lines++;
- glLoadIdentity();
- glTranslatef(x,y + step * lines,0);
- } else if(*s == 'r') {
- glLoadIdentity();
- glTranslatef(x,y + step * lines,0);
- } else if(*s == 't') {
- glTranslatef(step * 2,0,0);
- } else if(*s == ' ') {
- glTranslatef(step / 2,0,0);
- } else {
- glCallList(list_id + *(unsigned char*)s);
- }
- }
- glPopMatrix();
- }
- }
- /*
- */
- void Font::printf(float x,float y,const char *format,...) {
- char buf[1024];
- va_list argptr;
- va_start(argptr,format);
- vsprintf(buf,format,argptr);
- va_end(argptr);
- puts(x,y,buf);
- }
- /*
- */
- void Font::printfc(float x,float y,const char *format,...) {
- char buf[1024];
- va_list argptr;
- va_start(argptr,format);
- vsprintf(buf,format,argptr);
- va_end(argptr);
- char *s = buf;
- char *line = buf;
- for(int length = 0, lines = 0;; s++) {
- if(*s != 'n' && *s != ' ') {
- if(*s == ' ') length += step / 2;
- else if(*s == 't') length += step * 2;
- else length += space[*(unsigned char*)s][1];
- }
- else {
- if(*s == ' ') {
- printf(x - length / 2,y + step * lines,"%s",line);
- break;
- }
- *s = ' ';
- puts(x - length / 2,y + step * lines,line);
- line = s + 1;
- length = 0;
- lines++;
- }
- }
- }