[3478] | 1 | /* |
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| 2 | orxonox - the future of 3D-vertical-scrollers |
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| 3 | |
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| 4 | Copyright (C) 2004 orx |
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| 5 | |
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| 6 | This program is free software; you can redistribute it and/or modify |
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| 7 | it under the terms of the GNU General Public License as published by |
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| 8 | the Free Software Foundation; either version 2, or (at your option) |
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| 9 | any later version. |
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| 10 | |
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| 11 | ### File Specific: |
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| 12 | main-programmer: Benjamin Grauer |
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| 13 | co-programmer: ... |
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| 14 | |
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| 15 | *** |
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| 16 | * This file is extended to the needs of the orxonox-project. * |
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| 17 | * the Copyright of the original file is below this copyright * |
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| 18 | * *** |
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| 19 | |
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| 20 | */ |
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| 21 | |
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| 22 | /* |
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| 23 | glfont: An example of using the SDL_ttf library with OpenGL. |
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| 24 | Copyright (C) 1997-2004 Sam Lantinga |
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| 25 | |
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| 26 | This library is free software; you can redistribute it and/or |
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| 27 | modify it under the terms of the GNU Library General Public |
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| 28 | License as published by the Free Software Foundation; either |
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| 29 | version 2 of the License, or (at your option) any later version. |
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| 30 | |
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| 31 | This library is distributed in the hope that it will be useful, |
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| 32 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 33 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 34 | Library General Public License for more details. |
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| 35 | |
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| 36 | You should have received a copy of the GNU Library General Public |
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| 37 | License along with this library; if not, write to the Free |
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| 38 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 39 | |
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| 40 | The SDL_GL_* functions in this file are available in the public domain. |
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| 41 | |
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| 42 | Sam Lantinga |
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| 43 | slouken@libsdl.org |
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| 44 | */ |
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| 45 | |
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| 46 | #include "glfont.h" |
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| 47 | |
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| 48 | |
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| 49 | |
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| 50 | #include <stdlib.h> |
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| 51 | #include <stdio.h> |
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| 52 | #include <string.h> |
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| 53 | |
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| 54 | #include <SDL/SDL.h> |
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| 55 | #include <SDL/SDL_ttf.h> |
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| 56 | |
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| 57 | #include "../glincl.h" |
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| 58 | #include "../debug.h" |
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| 59 | |
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| 60 | |
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| 61 | #define DEFAULT_PTSIZE 18 |
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| 62 | #define DEFAULT_TEXT "orxonox 1234567890" |
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| 63 | #define NUM_COLORS 256 |
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| 64 | |
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| 65 | |
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| 66 | |
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| 67 | GLFont::GLFont() |
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| 68 | { |
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| 69 | this->init(""); |
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| 70 | |
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| 71 | } |
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| 72 | GLFont::GLFont(const char* fontFile) |
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| 73 | { |
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| 74 | this->init(fontFile); |
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| 75 | } |
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| 76 | GLFont::~GLFont() |
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| 77 | { |
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| 78 | |
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| 79 | } |
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| 80 | |
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| 81 | bool GLFont::init(const char* fontFile) |
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| 82 | { |
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| 83 | // setting default values. |
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| 84 | renderStyle = TTF_STYLE_NORMAL; |
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| 85 | |
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| 86 | |
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| 87 | // Initializing lib-TTF if necesary. |
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| 88 | if (TTF_WasInit() && TTF_Init() < 0 ) |
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| 89 | { |
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| 90 | PRINTF(1)("Couldn't initialize TTF: %s\n", SDL_GetError()); |
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| 91 | return false; |
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| 92 | } |
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| 93 | } |
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| 94 | |
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| 95 | bool GLFont::ttfInitialized = false; |
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| 96 | |
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| 97 | bool GLFont::setFont(const char* fonFile) |
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| 98 | { |
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| 99 | |
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| 100 | } |
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| 101 | void GLFont::setText(const char* text) |
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| 102 | { |
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| 103 | |
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| 104 | } |
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| 105 | |
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| 106 | void GLFont::setStyle(char* style) |
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| 107 | { |
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| 108 | renderStyle = TTF_STYLE_NORMAL; |
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| 109 | |
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| 110 | for (int i = 0; i < strlen(style); i++) |
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| 111 | if (strncmp(style+i, "b", 1) == 0) |
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| 112 | this->renderStyle |= TTF_STYLE_BOLD; |
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| 113 | else if (strncmp(style+i, "i", 1) == 0) |
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| 114 | this->renderStyle |= TTF_STYLE_ITALIC; |
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| 115 | else if (strncmp(style+i, "u", 1) == 0) |
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| 116 | this->renderStyle |= TTF_STYLE_UNDERLINE; |
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| 117 | |
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| 118 | // TTF_SetFontStyle(font, renderstyle); |
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| 119 | |
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| 120 | } |
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| 121 | void GLFont::setSize(void) |
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| 122 | { |
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| 123 | |
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| 124 | } |
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| 125 | void GLFont::setPosition(int x, int y) |
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| 126 | { |
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| 127 | |
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| 128 | } |
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| 129 | |
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| 130 | void GLFont::renderText(void) |
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| 131 | { |
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| 132 | |
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| 133 | } |
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| 134 | void GLFont::renderText(const char* text, int x, int y) |
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| 135 | { |
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| 136 | // enter the 2D-Mode |
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| 137 | |
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| 138 | SDL_Surface *screen = SDL_GetVideoSurface(); |
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| 139 | |
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| 140 | /* Note, there may be other things you need to change, |
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| 141 | depending on how you have your OpenGL state set up. |
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| 142 | */ |
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| 143 | glPushAttrib(GL_ENABLE_BIT); |
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| 144 | glDisable(GL_DEPTH_TEST); |
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| 145 | glDisable(GL_CULL_FACE); |
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| 146 | glEnable(GL_TEXTURE_2D); |
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| 147 | |
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| 148 | /* This allows alpha blending of 2D textures with the scene */ |
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| 149 | glEnable(GL_BLEND); |
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| 150 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
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| 151 | |
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| 152 | glViewport(0, 0, screen->w, screen->h); |
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| 153 | |
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| 154 | glMatrixMode(GL_PROJECTION); |
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| 155 | glPushMatrix(); |
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| 156 | glLoadIdentity(); |
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| 157 | |
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| 158 | glOrtho(0.0, (GLdouble)screen->w, (GLdouble)screen->h, 0.0, 0.0, 1.0); |
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| 159 | |
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| 160 | glMatrixMode(GL_MODELVIEW); |
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| 161 | glPushMatrix(); |
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| 162 | glLoadIdentity(); |
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| 163 | |
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| 164 | glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
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| 165 | |
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| 166 | |
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| 167 | |
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| 168 | |
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| 169 | |
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| 170 | // Leave the 2D-Mode |
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| 171 | glMatrixMode(GL_MODELVIEW); |
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| 172 | glPopMatrix(); |
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| 173 | |
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| 174 | glMatrixMode(GL_PROJECTION); |
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| 175 | glPopMatrix(); |
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| 176 | |
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| 177 | glPopAttrib(); |
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| 178 | } |
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| 179 | |
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| 180 | |
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| 181 | bool GLFont::loadTexture() |
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| 182 | { |
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| 183 | int w, h; |
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| 184 | SDL_Surface *image; |
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| 185 | SDL_Rect area; |
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| 186 | Uint32 saved_flags; |
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| 187 | Uint8 saved_alpha; |
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| 188 | |
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| 189 | /* Use the surface width and height expanded to powers of 2 */ |
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| 190 | w = powerOfTwo(surface->w); |
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| 191 | h = powerOfTwo(surface->h); |
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| 192 | texcoord[0] = 0.0f; /* Min X */ |
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| 193 | texcoord[1] = 0.0f; /* Min Y */ |
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| 194 | texcoord[2] = (GLfloat)surface->w / w; /* Max X */ |
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| 195 | texcoord[3] = (GLfloat)surface->h / h; /* Max Y */ |
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| 196 | |
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| 197 | image = SDL_CreateRGBSurface( |
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| 198 | SDL_SWSURFACE, |
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| 199 | w, h, |
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| 200 | 32, |
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| 201 | #if SDL_BYTEORDER == SDL_LIL_ENDIAN /* OpenGL RGBA masks */ |
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| 202 | 0x000000FF, |
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| 203 | 0x0000FF00, |
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| 204 | 0x00FF0000, |
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| 205 | 0xFF000000 |
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| 206 | #else |
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| 207 | 0xFF000000, |
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| 208 | 0x00FF0000, |
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| 209 | 0x0000FF00, |
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| 210 | 0x000000FF |
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| 211 | #endif |
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| 212 | ); |
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| 213 | if ( image == NULL ) { |
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| 214 | return 0; |
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| 215 | } |
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| 216 | |
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| 217 | /* Save the alpha blending attributes */ |
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| 218 | saved_flags = surface->flags&(SDL_SRCALPHA|SDL_RLEACCELOK); |
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| 219 | saved_alpha = surface->format->alpha; |
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| 220 | if ( (saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { |
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| 221 | SDL_SetAlpha(surface, 0, 0); |
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| 222 | } |
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| 223 | |
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| 224 | /* Copy the surface into the GL texture image */ |
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| 225 | area.x = 0; |
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| 226 | area.y = 0; |
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| 227 | area.w = surface->w; |
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| 228 | area.h = surface->h; |
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| 229 | SDL_BlitSurface(surface, &area, image, &area); |
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| 230 | |
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| 231 | /* Restore the alpha blending attributes */ |
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| 232 | if ( (saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { |
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| 233 | SDL_SetAlpha(surface, saved_flags, saved_alpha); |
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| 234 | } |
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| 235 | |
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| 236 | /* Create an OpenGL texture for the image */ |
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| 237 | glGenTextures(1, &texture); |
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| 238 | glBindTexture(GL_TEXTURE_2D, texture); |
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| 239 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
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| 240 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
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| 241 | glTexImage2D(GL_TEXTURE_2D, |
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| 242 | 0, |
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| 243 | GL_RGBA, |
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| 244 | w, h, |
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| 245 | 0, |
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| 246 | GL_RGBA, |
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| 247 | GL_UNSIGNED_BYTE, |
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| 248 | image->pixels); |
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| 249 | SDL_FreeSurface(image); /* No longer needed */ |
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| 250 | |
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| 251 | // return texture; |
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| 252 | } |
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| 253 | |
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| 254 | /* Quick utility function for texture creation */ |
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| 255 | int GLFont::powerOfTwo(int input) |
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| 256 | { |
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| 257 | int value = 1; |
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| 258 | |
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| 259 | while ( value < input ) { |
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| 260 | value <<= 1; |
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| 261 | } |
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| 262 | return value; |
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| 263 | } |
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| 264 | |
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| 265 | |
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| 266 | /* |
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| 267 | private: |
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| 268 | char* fontFile; |
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| 269 | char* text; |
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| 270 | int positionX; |
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| 271 | int positionY; |
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| 272 | */ |
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| 273 | |
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| 274 | |
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| 275 | |
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| 276 | |
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| 277 | char Usage[100] = "orxonox test" ; |
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| 278 | void SDL_GL_Enter2DMode() |
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| 279 | { |
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| 280 | } |
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| 281 | |
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| 282 | void SDL_GL_Leave2DMode() |
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| 283 | { |
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| 284 | } |
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| 285 | |
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| 286 | /* Quick utility function for texture creation */ |
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| 287 | static int power_of_two(int input) |
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| 288 | { |
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| 289 | } |
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| 290 | |
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| 291 | |
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| 292 | |
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| 293 | GLuint SDL_GL_LoadTexture(SDL_Surface *surface, GLfloat *texcoord) |
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| 294 | { |
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| 295 | |
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| 296 | } |
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| 297 | |
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| 298 | int setup(int argc, char *argv[]) |
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| 299 | { |
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| 300 | char *argv0 = argv[0]; |
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| 301 | SDL_Surface *screen; |
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| 302 | TTF_Font *font; |
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| 303 | SDL_Surface *text; |
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| 304 | int ptsize; |
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| 305 | int i, done; |
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| 306 | SDL_Color white = { 0xFF, 0xFF, 0xFF, 0 }; |
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| 307 | SDL_Color black = { 0x00, 0x00, 0x00, 0 }; |
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| 308 | SDL_Color *forecol; |
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| 309 | SDL_Color *backcol; |
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| 310 | GLenum gl_error; |
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| 311 | GLuint texture; |
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| 312 | int x, y, w, h; |
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| 313 | GLfloat texcoord[4]; |
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| 314 | GLfloat texMinX, texMinY; |
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| 315 | GLfloat texMaxX, texMaxY; |
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| 316 | |
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| 317 | int renderstyle; |
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| 318 | int dump; |
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| 319 | enum { |
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| 320 | RENDER_LATIN1, |
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| 321 | RENDER_UTF8, |
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| 322 | RENDER_UNICODE |
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| 323 | } rendertype; |
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| 324 | char *message; |
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| 325 | |
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| 326 | /* Look for special execution mode */ |
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| 327 | dump = 0; |
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| 328 | /* Look for special rendering types */ |
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| 329 | rendertype = RENDER_LATIN1; |
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| 330 | /* Default is black and white */ |
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| 331 | forecol = &black; |
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| 332 | backcol = &white; |
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| 333 | for ( i=1; argv[i] && argv[i][0] == '-'; ++i ) { |
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| 334 | if ( strcmp(argv[i], "-utf8") == 0 ) { |
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| 335 | rendertype = RENDER_UTF8; |
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| 336 | } else |
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| 337 | if ( strcmp(argv[i], "-unicode") == 0 ) { |
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| 338 | rendertype = RENDER_UNICODE; |
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| 339 | } else |
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| 340 | if ( strcmp(argv[i], "-b") == 0 ) { |
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| 341 | renderstyle |= TTF_STYLE_BOLD; |
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| 342 | } else |
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| 343 | if ( strcmp(argv[i], "-i") == 0 ) { |
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| 344 | renderstyle |= TTF_STYLE_ITALIC; |
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| 345 | } else |
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| 346 | if ( strcmp(argv[i], "-u") == 0 ) { |
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| 347 | renderstyle |= TTF_STYLE_UNDERLINE; |
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| 348 | } else |
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| 349 | if ( strcmp(argv[i], "-dump") == 0 ) { |
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| 350 | dump = 1; |
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| 351 | } else |
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| 352 | if ( strcmp(argv[i], "-fgcol") == 0 ) { |
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| 353 | int r, g, b; |
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| 354 | if ( sscanf (argv[++i], "%d,%d,%d", &r, &g, &b) != 3 ) { |
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| 355 | fprintf(stderr, Usage, argv0); |
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| 356 | return(1); |
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| 357 | } |
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| 358 | forecol->r = (Uint8)r; |
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| 359 | forecol->g = (Uint8)g; |
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| 360 | forecol->b = (Uint8)b; |
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| 361 | } else |
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| 362 | if ( strcmp(argv[i], "-bgcol") == 0 ) { |
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| 363 | int r, g, b; |
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| 364 | if ( sscanf (argv[++i], "%d,%d,%d", &r, &g, &b) != 3 ) { |
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| 365 | fprintf(stderr, Usage, argv0); |
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| 366 | return(1); |
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| 367 | } |
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| 368 | backcol->r = (Uint8)r; |
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| 369 | backcol->g = (Uint8)g; |
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| 370 | backcol->b = (Uint8)b; |
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| 371 | } else { |
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| 372 | fprintf(stderr, Usage, argv0); |
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| 373 | return(1); |
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| 374 | } |
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| 375 | } |
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| 376 | argv += i; |
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| 377 | argc -= i; |
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| 378 | |
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| 379 | /* Check usage */ |
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| 380 | if ( ! argv[0] ) { |
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| 381 | fprintf(stderr, Usage, argv0); |
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| 382 | return(1); |
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| 383 | } |
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| 384 | |
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| 385 | /* Initialize SDL */ |
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| 386 | if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { |
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| 387 | fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); |
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| 388 | return(2); |
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| 389 | } |
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| 390 | atexit(SDL_Quit); |
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| 391 | |
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| 392 | /* Initialize the TTF library */ |
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| 393 | if ( TTF_Init() < 0 ) { |
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| 394 | fprintf(stderr, "Couldn't initialize TTF: %s\n",SDL_GetError()); |
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| 395 | return(2); |
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| 396 | } |
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| 397 | atexit(TTF_Quit); |
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| 398 | |
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| 399 | /* Open the font file with the requested point size */ |
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| 400 | ptsize = 0; |
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| 401 | if ( argc > 1 ) { |
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| 402 | ptsize = atoi(argv[1]); |
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| 403 | } |
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| 404 | if ( ptsize == 0 ) { |
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| 405 | i = 2; |
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| 406 | ptsize = DEFAULT_PTSIZE; |
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| 407 | } else { |
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| 408 | i = 3; |
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| 409 | } |
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| 410 | font = TTF_OpenFont(argv[0], ptsize); |
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| 411 | if ( font == NULL ) { |
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| 412 | fprintf(stderr, "Couldn't load %d pt font from %s: %s\n", |
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| 413 | ptsize, argv[0], SDL_GetError()); |
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| 414 | return(2); |
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| 415 | } |
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| 416 | |
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| 417 | if( dump ) { |
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| 418 | |
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| 419 | for( i = 48; i < 123; i++ ) { |
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| 420 | SDL_Surface* glyph = NULL; |
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| 421 | |
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| 422 | glyph = TTF_RenderGlyph_Shaded( font, i, *forecol, *backcol ); |
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| 423 | |
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| 424 | if( glyph ) { |
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| 425 | char outname[64]; |
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| 426 | sprintf( outname, "glyph-%d.bmp", i ); |
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| 427 | SDL_SaveBMP( glyph, outname ); |
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| 428 | } |
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| 429 | |
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| 430 | } |
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| 431 | |
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| 432 | return( 0 ); |
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| 433 | } |
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| 434 | |
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| 435 | /* Set a 640x480 video mode */ |
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| 436 | screen = SDL_SetVideoMode(640, 480, 0, SDL_OPENGL); |
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| 437 | if ( screen == NULL ) { |
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| 438 | fprintf(stderr, "Couldn't set 640x480 OpenGL mode: %s\n", |
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| 439 | SDL_GetError()); |
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| 440 | return(2); |
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| 441 | } |
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| 442 | |
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| 443 | /* Render and center the message */ |
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| 444 | if ( argc > 2 ) { |
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| 445 | message = argv[2]; |
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| 446 | } else { |
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| 447 | message = DEFAULT_TEXT; |
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| 448 | } |
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| 449 | switch (rendertype) { |
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| 450 | case RENDER_LATIN1: |
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| 451 | text = TTF_RenderText_Blended(font, message, *forecol); |
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| 452 | break; |
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| 453 | |
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| 454 | case RENDER_UTF8: |
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| 455 | text = TTF_RenderUTF8_Blended(font, message, *forecol); |
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| 456 | break; |
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| 457 | |
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| 458 | case RENDER_UNICODE: |
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| 459 | { |
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| 460 | /* This doesn't actually work because you can't pass |
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| 461 | UNICODE text in via command line, AFAIK, but... |
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| 462 | */ |
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| 463 | Uint16 unicode_text[BUFSIZ]; |
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| 464 | int index; |
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| 465 | for ( index = 0; (message[0] || message[1]); ++index ) { |
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| 466 | unicode_text[index] = ((Uint8 *)message)[0]; |
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| 467 | unicode_text[index] <<= 8; |
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| 468 | unicode_text[index] |= ((Uint8 *)message)[1]; |
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| 469 | message += 2; |
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| 470 | } |
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| 471 | text = TTF_RenderUNICODE_Blended(font, |
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| 472 | unicode_text, *forecol); |
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| 473 | } |
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| 474 | break; |
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| 475 | default: |
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| 476 | text = NULL; /* This shouldn't happen */ |
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| 477 | break; |
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| 478 | } |
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| 479 | if ( text == NULL ) { |
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| 480 | fprintf(stderr, "Couldn't render text: %s\n", SDL_GetError()); |
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| 481 | TTF_CloseFont(font); |
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| 482 | return(2); |
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| 483 | } |
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| 484 | x = (screen->w - text->w)/2; |
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| 485 | y = (screen->h - text->h)/2; |
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| 486 | w = text->w; |
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| 487 | h = text->h; |
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| 488 | printf("Font is generally %d big, and string is %hd big\n", |
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| 489 | TTF_FontHeight(font), text->h); |
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| 490 | |
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| 491 | /* Convert the text into an OpenGL texture */ |
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| 492 | glGetError(); |
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| 493 | texture = SDL_GL_LoadTexture(text, texcoord); |
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| 494 | if ( (gl_error = glGetError()) != GL_NO_ERROR ) { |
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| 495 | /* If this failed, the text may exceed texture size limits */ |
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| 496 | printf("Warning: Couldn't create texture: 0x%x\n", gl_error); |
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| 497 | } |
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| 498 | |
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| 499 | /* Make texture coordinates easy to understand */ |
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| 500 | texMinX = texcoord[0]; |
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| 501 | texMinY = texcoord[1]; |
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| 502 | texMaxX = texcoord[2]; |
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| 503 | texMaxY = texcoord[3]; |
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| 504 | |
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| 505 | /* We don't need the original text surface anymore */ |
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| 506 | SDL_FreeSurface(text); |
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| 507 | |
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| 508 | /* Initialize the GL state */ |
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| 509 | glViewport( 0, 0, screen->w, screen->h ); |
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| 510 | glMatrixMode( GL_PROJECTION ); |
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| 511 | glLoadIdentity( ); |
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| 512 | |
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| 513 | glOrtho( -2.0, 2.0, -2.0, 2.0, -20.0, 20.0 ); |
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| 514 | |
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| 515 | glMatrixMode( GL_MODELVIEW ); |
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| 516 | glLoadIdentity( ); |
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| 517 | |
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| 518 | glEnable(GL_DEPTH_TEST); |
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| 519 | |
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| 520 | glDepthFunc(GL_LESS); |
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| 521 | |
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| 522 | glShadeModel(GL_SMOOTH); |
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| 523 | |
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| 524 | /* Wait for a keystroke, and blit text on mouse press */ |
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| 525 | done = 0; |
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| 526 | while ( ! done ) { |
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| 527 | |
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| 528 | /* Show the text on the screen */ |
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| 529 | SDL_GL_Enter2DMode(); |
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| 530 | glBindTexture(GL_TEXTURE_2D, texture); |
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| 531 | glBegin(GL_QUADS); |
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| 532 | glTexCoord2f(texMinX, texMinY); glVertex2i(x, y ); |
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| 533 | glTexCoord2f(texMaxX, texMinY); glVertex2i(x+w, y ); |
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| 534 | glTexCoord2f(texMinX, texMaxY); glVertex2i(x, y+h); |
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| 535 | glTexCoord2f(texMaxX, texMaxY); glVertex2i(x+w, y+h); |
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| 536 | glEnd(); |
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| 537 | SDL_GL_Leave2DMode(); |
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| 538 | |
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| 539 | /* Swap the buffers so everything is visible */ |
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| 540 | SDL_GL_SwapBuffers( ); |
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| 541 | } |
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| 542 | TTF_CloseFont(font); |
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| 543 | return(0); |
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| 544 | } |
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| 545 | |
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