Source/Text.cpp

   1 /*
   2 Copyright (C) 2003, 2010 - Wolfire Games
   3
   4 This file is part of Lugaru.
   5
   6 Lugaru is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU General Public License
   8 as published by the Free Software Foundation; either version 2
   9 of the License, or (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  14
  15 See the GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20 */
  21
  22 /**> HEADER FILES <**/
  23 #include "Text.h"
  24 #include "Game.h"
  25 extern TGAImageRec texture;
  26
  27 void Text::LoadFontTexture(const char *fileName)
  28 {
  29         GLuint          type;
  30
  31         LOGFUNC;
  32
  33         LOG(std::string("Loading font texture...") + fileName);
  34
  35         Game::LoadTexture(fileName, &FontTexture, false, false);
  36 /*
  37         //Load Image
  38         //LoadTGA( fileName );
  39         unsigned char fileNamep[256];
  40         CopyCStringToPascal(fileName,fileNamep);
  41         //Load Image
  42         upload_image( fileNamep ,1);
  43
  44         //Is it valid?
  45         if(1==1){
  46                 //Alpha channel?
  47                 if ( texture.bpp == 24 )
  48                         type = GL_RGB;
  49                 else
  50                         type = GL_RGBA;
  51
  52                 glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
  53
  54                 if(!FontTexture)glGenTextures( 1, &FontTexture );
  55                 glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
  56
  57                 glBindTexture( GL_TEXTURE_2D, FontTexture);
  58                 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
  59                 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
  60
  61                 gluBuild2DMipmaps( GL_TEXTURE_2D, type, texture.sizeX, texture.sizeY, type, GL_UNSIGNED_BYTE, texture.data );
  62         }
  63 */
  64         if (base)
  65         {
  66                 glDeleteLists(base, 512);
  67                 base = 0;
  68         }
  69 }
  70
  71 void Text::BuildFont()                                                          // Build Our Font Display List
  72 {
  73         float   cx;                                                                                     // Holds Our X Character Coord
  74         float   cy;                                                                                     // Holds Our Y Character Coord
  75         int loop;
  76
  77         LOGFUNC;
  78
  79         if (base)
  80         {
  81                 LOG("Font already created...");
  82                 return;
  83         }
  84
  85 //      base=glGenLists(256);                                                           // Creating 256 Display Lists
  86         base=glGenLists(512);                                                           // Creating 256 Display Lists
  87         glBindTexture(GL_TEXTURE_2D, FontTexture);                      // Select Our Font Texture
  88         for (loop=0; loop<512; loop++)                                          // Loop Through All 256 Lists
  89         {
  90                 if (loop < 256)
  91                 {
  92                         cx=float(loop%16)/16.0f;                                                // X Position Of Current Character
  93                         cy=float(loop/16)/16.0f;                                                // Y Position Of Current Character
  94                 }
  95                 else
  96                 {
  97                         cx=float((loop-256)%16)/16.0f;                                          // X Position Of Current Character
  98                         cy=float((loop-256)/16)/16.0f;                                          // Y Position Of Current Character
  99                 }
 100                 glNewList(base+loop,GL_COMPILE);                                // Start Building A List
 101                 glBegin(GL_QUADS);                                                      // Use A Quad For Each Character
 102                 glTexCoord2f(cx,1-cy-0.0625f+.001);                     // Texture Coord (Bottom Left)
 103                 glVertex2i(0,0);                                                // Vertex Coord (Bottom Left)
 104                 glTexCoord2f(cx+0.0625f,1-cy-0.0625f+.001);     // Texture Coord (Bottom Right)
 105                 glVertex2i(16,0);                                               // Vertex Coord (Bottom Right)
 106                 glTexCoord2f(cx+0.0625f,1-cy-.001);                     // Texture Coord (Top Right)
 107                 glVertex2i(16,16);                                              // Vertex Coord (Top Right)
 108                 glTexCoord2f(cx,1-cy-+.001);                                    // Texture Coord (Top Left)
 109                 glVertex2i(0,16);                                               // Vertex Coord (Top Left)
 110                 glEnd();                                                                        // Done Building Our Quad (Character)
 111                 if (loop < 256)
 112                         glTranslated(10,0,0);                                           // Move To The Right Of The Character
 113                 else
 114                         glTranslated(8,0,0);                                            // Move To The Right Of The Character
 115                 glEndList();                                                                    // Done Building The Display List
 116         }                                                                                                       // Loop Until All 256 Are Built
 117 }
 118
 119 void Text::glPrint(float x, float y, const char *string, int set, float size, float width, float height)        // Where The Printing Happens
 120 {
 121         glPrint(x, y, string, set, size, width, height, 0, strlen(string));
 122 }
 123
 124 void Text::_glPrint(float x, float y, const char *string, int set, float size, float width, float height,int start,int end, int offset) // Where The Printing Happens
 125 {
 126         if (set>1)
 127         {
 128                 set=1;
 129         }
 130         glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 131         glBindTexture(GL_TEXTURE_2D, FontTexture);                      // Select Our Font Texture
 132         glDisable(GL_DEPTH_TEST);                                                       // Disables Depth Testing
 133         glDisable(GL_LIGHTING);
 134         glEnable(GL_BLEND);
 135         glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
 136         glMatrixMode(GL_PROJECTION);                                            // Select The Projection Matrix
 137         glPushMatrix();                                                                         // Store The Projection Matrix
 138                 glLoadIdentity();                                                                       // Reset The Projection Matrix
 139                 glOrtho(0,width,0,height,-100,100);                                             // Set Up An Ortho Screen
 140                 glMatrixMode(GL_MODELVIEW);                                                     // Select The Modelview Matrix
 141                 glPushMatrix();                                                                         // Store The Modelview Matrix
 142                         glLoadIdentity();
 143                         glTranslated(x,y,0);                                                            // Position The Text (0,0 - Bottom Left)
 144                         glScalef(size,size,1);                                                                  // Reset The Modelview Matrix
 145                         glListBase(base-32+(128*set) + offset);                                         // Choose The Font Set (0 or 1)
 146                         glCallLists(end-start,GL_BYTE,&string[start]);                  // Write The Text To The Screen
 147                         glMatrixMode(GL_PROJECTION);                                            // Select The Projection Matrix
 148                 glPopMatrix();                                                                          // Restore The Old Projection Matrix
 149                 glMatrixMode(GL_MODELVIEW);                                                     // Select The Modelview Matrix
 150         glPopMatrix();                                                                          // Restore The Old Projection Matrix
 151         glEnable(GL_DEPTH_TEST);                                                        // Enables Depth Testing
 152         glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 153 }
 154
 155 void Text::glPrint(float x, float y, const char *string, int set, float size, float width, float height,int start,int end)      // Where The Printing Happens
 156 {
 157         _glPrint(x, y, string, set, size, width, height, start, end, 0);
 158 }
 159
 160 void Text::glPrintOutline(float x, float y, const char *string, int set, float size, float width, float height) // Where The Printing Happens
 161 {
 162         glPrintOutline(x, y, string, set, size, width, height, 0, strlen(string));
 163 }
 164
 165 void Text::glPrintOutline(float x, float y, const char *string, int set, float size, float width, float height,int start,int end)       // Where The Printing Happens
 166 {
 167         _glPrint(x, y, string, set, size, width, height, start, end, 256);
 168 }
 169 void Text::glPrintOutlined(float x, float y, const char *string, int set, float size, float width, float height)        // Where The Printing Happens
 170 {
 171         glPrintOutlined(1, 1, 1, x, y, string, set, size, width, height);
 172 }
 173
 174 void Text::glPrintOutlined(float r, float g, float b, float x, float y, const char *string, int set, float size, float width, float height)     // Where The Printing Happens
 175 {
 176         glColor4f(0,0,0,1);
 177         glPrintOutline( x-2*size,  y-2*size, string,  set,  size*2.5/2,  width,  height);
 178         glColor4f(r,g,b,1);
 179         glPrint( x,  y, string,  set,  size,  width,  height);
 180 }
 181
 182 Text::Text()
 183 {
 184         base = 0;
 185         FontTexture = 0;
 186 }
 187 Text::~Text()
 188 {
 189         if (base)
 190         {
 191                 glDeleteLists(base, 512);
 192                 base = 0;
 193         }
 194         if (FontTexture) glDeleteTextures( 1, &FontTexture );
 195 }
 196