4 * Bitmap and stroke fonts displaying.
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6 * Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
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7 * Written by Pawel W. Olszta, <olszta@sourceforge.net>
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8 * Creation date: Thu Dec 16 1999
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10 * Permission is hereby granted, free of charge, to any person obtaining a
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11 * copy of this software and associated documentation files (the "Software"),
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12 * to deal in the Software without restriction, including without limitation
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13 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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14 * and/or sell copies of the Software, and to permit persons to whom the
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15 * Software is furnished to do so, subject to the following conditions:
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17 * The above copyright notice and this permission notice shall be included
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18 * in all copies or substantial portions of the Software.
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20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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23 * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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24 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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25 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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28 #include <GL/freeglut.h>
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29 #include "freeglut_internal.h"
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32 * TODO BEFORE THE STABLE RELEASE:
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34 * Test things out ...
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37 /* -- IMPORT DECLARATIONS -------------------------------------------------- */
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40 * These are the font faces defined in freeglut_font_data.c file:
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42 extern SFG_Font fgFontFixed8x13;
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43 extern SFG_Font fgFontFixed9x15;
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44 extern SFG_Font fgFontHelvetica10;
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45 extern SFG_Font fgFontHelvetica12;
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46 extern SFG_Font fgFontHelvetica18;
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47 extern SFG_Font fgFontTimesRoman10;
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48 extern SFG_Font fgFontTimesRoman24;
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49 extern SFG_StrokeFont fgStrokeRoman;
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50 extern SFG_StrokeFont fgStrokeMonoRoman;
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53 /* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
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56 * Matches a font ID with a SFG_Font structure pointer.
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57 * This was changed to match the GLUT header style.
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59 static SFG_Font* fghFontByID( void* font )
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61 if( font == GLUT_BITMAP_8_BY_13 )
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62 return &fgFontFixed8x13;
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63 if( font == GLUT_BITMAP_9_BY_15 )
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64 return &fgFontFixed9x15;
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65 if( font == GLUT_BITMAP_HELVETICA_10 )
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66 return &fgFontHelvetica10;
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67 if( font == GLUT_BITMAP_HELVETICA_12 )
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68 return &fgFontHelvetica12;
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69 if( font == GLUT_BITMAP_HELVETICA_18 )
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70 return &fgFontHelvetica18;
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71 if( font == GLUT_BITMAP_TIMES_ROMAN_10 )
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72 return &fgFontTimesRoman10;
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73 if( font == GLUT_BITMAP_TIMES_ROMAN_24 )
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74 return &fgFontTimesRoman24;
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76 fgWarning( "font 0x%08x not found", font );
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81 * Matches a font ID with a SFG_StrokeFont structure pointer.
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82 * This was changed to match the GLUT header style.
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84 static SFG_StrokeFont* fghStrokeByID( void* font )
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86 if( font == GLUT_STROKE_ROMAN )
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87 return &fgStrokeRoman;
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88 if( font == GLUT_STROKE_MONO_ROMAN )
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89 return &fgStrokeMonoRoman;
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91 fgWarning( "stroke font 0x%08x not found", font );
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96 /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
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99 * Draw a bitmap character
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101 void FGAPIENTRY glutBitmapCharacter( void* fontID, int character )
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103 const GLubyte* face;
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105 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutBitmapCharacter" );
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106 font = fghFontByID( fontID );
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107 freeglut_return_if_fail( ( character >= 1 )&&( character < 256 ) );
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108 freeglut_return_if_fail( font );
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111 * Find the character we want to draw (???)
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113 face = font->Characters[ character ];
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115 glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT );
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116 glPixelStorei( GL_UNPACK_SWAP_BYTES, GL_FALSE );
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117 glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE );
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118 glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
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119 glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
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120 glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
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121 glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
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123 face[ 0 ], font->Height, /* The bitmap's width and height */
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124 font->xorig, font->yorig, /* The origin in the font glyph */
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125 ( float )( face[ 0 ] ), 0.0, /* The raster advance -- inc. x,y */
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126 ( face + 1 ) /* The packed bitmap data... */
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128 glPopClientAttrib( );
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131 void FGAPIENTRY glutBitmapString( void* fontID, const unsigned char *string )
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136 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutBitmapString" );
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137 font = fghFontByID( fontID );
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138 freeglut_return_if_fail( font );
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139 if ( !string || ! *string )
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142 glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT );
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143 glPixelStorei( GL_UNPACK_SWAP_BYTES, GL_FALSE );
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144 glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE );
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145 glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
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146 glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
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147 glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
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148 glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
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151 * Step through the string, drawing each character.
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152 * A newline will simply translate the next character's insertion
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153 * point back to the start of the line and down one line.
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155 while( ( c = *string++) )
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158 glBitmap ( 0, 0, 0, 0, -x, (float) -font->Height, NULL );
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161 else /* Not an EOL, draw the bitmap character */
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163 const GLubyte* face = font->Characters[ c ];
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166 face[ 0 ], font->Height, /* Bitmap's width and height */
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167 font->xorig, font->yorig, /* The origin in the font glyph */
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168 ( float )( face[ 0 ] ), 0.0, /* The raster advance; inc. x,y */
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169 ( face + 1 ) /* The packed bitmap data... */
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172 x += ( float )( face[ 0 ] );
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175 glPopClientAttrib( );
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179 * Returns the width in pixels of a font's character
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181 int FGAPIENTRY glutBitmapWidth( void* fontID, int character )
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184 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutBitmapWidth" );
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185 font = fghFontByID( fontID );
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186 freeglut_return_val_if_fail( character > 0 && character < 256, 0 );
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187 freeglut_return_val_if_fail( font, 0 );
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188 return *( font->Characters[ character ] );
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192 * Return the width of a string drawn using a bitmap font
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194 int FGAPIENTRY glutBitmapLength( void* fontID, const unsigned char* string )
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197 int length = 0, this_line_length = 0;
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199 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutBitmapLength" );
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200 font = fghFontByID( fontID );
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201 freeglut_return_val_if_fail( font, 0 );
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202 if ( !string || ! *string )
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205 while( ( c = *string++) )
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207 if( c != '\n' )/* Not an EOL, increment length of line */
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208 this_line_length += *( font->Characters[ c ]);
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209 else /* EOL; reset the length of this line */
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211 if( length < this_line_length )
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212 length = this_line_length;
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213 this_line_length = 0;
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216 if ( length < this_line_length )
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217 length = this_line_length;
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223 * Returns the height of a bitmap font
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225 int FGAPIENTRY glutBitmapHeight( void* fontID )
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228 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutBitmapHeight" );
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229 font = fghFontByID( fontID );
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230 freeglut_return_val_if_fail( font, 0 );
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231 return font->Height;
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235 * Draw a stroke character
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237 void FGAPIENTRY glutStrokeCharacter( void* fontID, int character )
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239 const SFG_StrokeChar *schar;
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240 const SFG_StrokeStrip *strip;
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242 SFG_StrokeFont* font;
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243 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutStrokeCharacter" );
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244 font = fghStrokeByID( fontID );
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245 freeglut_return_if_fail( character >= 0 );
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246 freeglut_return_if_fail( character < font->Quantity );
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247 freeglut_return_if_fail( font );
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249 schar = font->Characters[ character ];
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250 freeglut_return_if_fail( schar );
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251 strip = schar->Strips;
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253 for( i = 0; i < schar->Number; i++, strip++ )
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255 glBegin( GL_LINE_STRIP );
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256 for( j = 0; j < strip->Number; j++ )
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257 glVertex2f( strip->Vertices[ j ].X, strip->Vertices[ j ].Y );
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259 glBegin( GL_POINTS );
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260 for( j = 0; j < strip->Number; j++ )
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261 glVertex2f( strip->Vertices[ j ].X, strip->Vertices[ j ].Y );
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264 glTranslatef( schar->Right, 0.0, 0.0 );
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267 void FGAPIENTRY glutStrokeString( void* fontID, const unsigned char *string )
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271 float length = 0.0;
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272 SFG_StrokeFont* font;
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273 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutStrokeString" );
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274 font = fghStrokeByID( fontID );
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275 freeglut_return_if_fail( font );
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276 if ( !string || ! *string )
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280 * Step through the string, drawing each character.
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281 * A newline will simply translate the next character's insertion
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282 * point back to the start of the line and down one line.
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284 while( ( c = *string++) )
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285 if( c < font->Quantity )
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289 glTranslatef ( -length, -( float )( font->Height ), 0.0 );
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292 else /* Not an EOL, draw the bitmap character */
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294 const SFG_StrokeChar *schar = font->Characters[ c ];
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297 const SFG_StrokeStrip *strip = schar->Strips;
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299 for( i = 0; i < schar->Number; i++, strip++ )
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301 glBegin( GL_LINE_STRIP );
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302 for( j = 0; j < strip->Number; j++ )
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303 glVertex2f( strip->Vertices[ j ].X,
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304 strip->Vertices[ j ].Y);
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309 length += schar->Right;
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310 glTranslatef( schar->Right, 0.0, 0.0 );
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317 * Return the width in pixels of a stroke character
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319 int FGAPIENTRY glutStrokeWidth( void* fontID, int character )
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321 const SFG_StrokeChar *schar;
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322 SFG_StrokeFont* font;
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323 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutStrokeWidth" );
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324 font = fghStrokeByID( fontID );
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325 freeglut_return_val_if_fail( ( character >= 0 ) &&
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326 ( character < font->Quantity ),
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329 freeglut_return_val_if_fail( font, 0 );
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330 schar = font->Characters[ character ];
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331 freeglut_return_val_if_fail( schar, 0 );
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333 return ( int )( schar->Right + 0.5 );
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337 * Return the width of a string drawn using a stroke font
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339 int FGAPIENTRY glutStrokeLength( void* fontID, const unsigned char* string )
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342 float length = 0.0;
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343 float this_line_length = 0.0;
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344 SFG_StrokeFont* font;
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345 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutStrokeLength" );
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346 font = fghStrokeByID( fontID );
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347 freeglut_return_val_if_fail( font, 0 );
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348 if ( !string || ! *string )
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351 while( ( c = *string++) )
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352 if( c < font->Quantity )
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354 if( c == '\n' ) /* EOL; reset the length of this line */
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356 if( length < this_line_length )
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357 length = this_line_length;
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358 this_line_length = 0.0;
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360 else /* Not an EOL, increment the length of this line */
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362 const SFG_StrokeChar *schar = font->Characters[ c ];
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364 this_line_length += schar->Right;
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367 if( length < this_line_length )
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368 length = this_line_length;
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369 return( int )( length + 0.5 );
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373 * Returns the height of a stroke font
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375 GLfloat FGAPIENTRY glutStrokeHeight( void* fontID )
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377 SFG_StrokeFont* font;
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378 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutStrokeHeight" );
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379 font = fghStrokeByID( fontID );
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380 freeglut_return_val_if_fail( font, 0.0 );
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381 return font->Height;
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384 /*** END OF FILE ***/
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