[4662] | 1 | /* |
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[3341] | 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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[3590] | 16 | #define DEBUG_SPECIAL_MODULE DEBUG_MODULE_IMPORTER |
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| 17 | |
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[3341] | 18 | #include "texture.h" |
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| 19 | |
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[4357] | 20 | #include "debug.h" |
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[3622] | 21 | |
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[5858] | 22 | // INCLUDING SDL_Image |
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[4662] | 23 | #ifdef HAVE_SDL_IMAGE_H |
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[4357] | 24 | #include <SDL_image.h> |
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[4662] | 25 | #else |
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| 26 | #include <SDL/SDL_image.h> |
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| 27 | #endif |
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[4357] | 28 | |
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[3341] | 29 | /** |
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[4836] | 30 | * Constructor for a Texture |
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[3344] | 31 | */ |
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[3655] | 32 | Texture::Texture(const char* imageName) |
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| 33 | { |
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[5304] | 34 | this->setClassID(CL_TEXTURE, "Texture"); |
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| 35 | |
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[5212] | 36 | this->bAlpha = false; |
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[3655] | 37 | this->texture = 0; |
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[5753] | 38 | this->image = NULL; |
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[6129] | 39 | this->priority = 0.5; |
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[5754] | 40 | |
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[5305] | 41 | if (imageName != NULL) |
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[5769] | 42 | { |
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| 43 | this->setName(imageName); |
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[3905] | 44 | this->loadImage(imageName); |
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[5769] | 45 | } |
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[4662] | 46 | } |
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[3655] | 47 | |
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[5863] | 48 | |
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[3655] | 49 | /** |
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[4836] | 50 | * Destructor of a Texture |
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[4662] | 51 | |
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[3344] | 52 | Frees Data, and deletes the textures from GL |
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| 53 | */ |
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[4746] | 54 | Texture::~Texture() |
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[3344] | 55 | { |
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[5211] | 56 | if (this->texture != 0) |
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[3344] | 57 | glDeleteTextures(1, &this->texture); |
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[5753] | 58 | if (this->image != NULL) |
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| 59 | SDL_FreeSurface(this->image); |
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[3344] | 60 | } |
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| 61 | |
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[5863] | 62 | |
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[3863] | 63 | /** |
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[4836] | 64 | * loads an Image from a file to a Texture |
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| 65 | * @param imageName The image to load |
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[3863] | 66 | */ |
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[3655] | 67 | bool Texture::loadImage(const char* imageName) |
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[3341] | 68 | { |
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[5858] | 69 | if (Texture::texturesEnabled) |
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[3341] | 70 | { |
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[5754] | 71 | if (this->image != NULL) |
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[5768] | 72 | { |
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| 73 | SDL_FreeSurface(this->image); |
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| 74 | this->image = NULL; |
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| 75 | } |
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[5754] | 76 | if (this->texture != 0) |
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[5768] | 77 | { |
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| 78 | glDeleteTextures(1, &this->texture); |
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| 79 | this->texture = 0; |
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| 80 | } |
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[5305] | 81 | if (imageName != NULL) |
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[4662] | 82 | { |
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| 83 | SDL_Surface* tmpSurf; |
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[5856] | 84 | if (this->texture != 0 && glIsTexture(this->texture)) |
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[4662] | 85 | glDeleteTextures(1, &this->texture); |
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| 86 | // load the new Image to memory |
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| 87 | tmpSurf = IMG_Load(imageName); |
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[5753] | 88 | if(tmpSurf != NULL) |
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| 89 | { |
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[5754] | 90 | PRINTF(4)("loading Image %s\n", imageName); |
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[5859] | 91 | bool hasAlpha; |
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| 92 | SDL_Surface* newSurf = this->prepareSurface(tmpSurf, hasAlpha); |
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| 93 | if (newSurf != NULL) |
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| 94 | { |
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| 95 | this->setSurface(newSurf); |
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| 96 | this->setAlpha(hasAlpha); |
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| 97 | this->setTexture(Texture::loadTexToGL(newSurf)); |
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| 98 | } |
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[5856] | 99 | |
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[5753] | 100 | SDL_FreeSurface(tmpSurf); |
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| 101 | return true; |
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| 102 | } |
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| 103 | else |
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[4662] | 104 | { |
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| 105 | PRINTF(1)("IMG_Load: %s\n", IMG_GetError()); |
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[5305] | 106 | this->texture = 0; |
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[4662] | 107 | return false; |
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| 108 | } |
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| 109 | } |
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[3622] | 110 | else |
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[4662] | 111 | { |
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[5768] | 112 | PRINTF(2)("Image-Name not specified\n"); |
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[4662] | 113 | return false; |
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| 114 | } |
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[3341] | 115 | } |
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[5754] | 116 | return false; |
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[3341] | 117 | } |
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[5753] | 118 | |
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[5863] | 119 | |
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| 120 | /** |
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| 121 | * rebuilds the texture. |
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| 122 | * reloads the Texture from Memory to OpenGL. |
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| 123 | */ |
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[5755] | 124 | bool Texture::rebuild() |
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[5754] | 125 | { |
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[5860] | 126 | if (this->texture != 0) |
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[5754] | 127 | { |
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[5860] | 128 | if (glIsTexture(this->texture)) |
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| 129 | glDeleteTextures(1,&this->texture); |
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[5859] | 130 | this->setTexture(0); |
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[5754] | 131 | } |
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| 132 | |
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| 133 | if (this->image != NULL) |
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[5755] | 134 | { |
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[5790] | 135 | PRINTF(3)("Reloading Texture of %s '%s'\n", this->getClassName(), this->getName()); |
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[5859] | 136 | this->setTexture(loadTexToGL(this->image)); |
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[5755] | 137 | } |
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[5863] | 138 | } |
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[5768] | 139 | |
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[5863] | 140 | |
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| 141 | /** |
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| 142 | * set the surface this Texture handles |
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| 143 | * @param newSurface the new Surface to set as the image for this Texture. |
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| 144 | * |
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| 145 | * This deletes the old version of the stored Texture, |
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| 146 | * and sets the newly given Surface as current. |
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| 147 | */ |
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| 148 | bool Texture::setSurface(SDL_Surface* newSurface) |
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| 149 | { |
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| 150 | if (this->image != NULL) |
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| 151 | SDL_FreeSurface(this->image); |
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| 152 | |
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| 153 | this->image = newSurface; |
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| 154 | |
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| 155 | return (this->image != NULL); |
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[5754] | 156 | } |
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| 157 | |
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[5863] | 158 | |
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| 159 | bool Texture::texturesEnabled = true; |
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| 160 | |
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[5754] | 161 | /** |
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[5863] | 162 | * enables, disables textures |
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| 163 | * @param texturesEnabled true if the textures should be enabled |
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| 164 | */ |
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| 165 | void Texture::setTextureEnableState(bool texturesEnabled) |
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| 166 | { |
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| 167 | Texture::texturesEnabled = texturesEnabled; |
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| 168 | } |
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| 169 | |
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| 170 | |
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| 171 | ////////////////////////////////////// |
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| 172 | // UTILITY FUNCTIONALITY OF TEXTURE // |
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| 173 | ////////////////////////////////////// |
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| 174 | /** |
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[5754] | 175 | * converts surface to a new SDL_Surface, that is loadable by openGL |
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| 176 | * @param surface the Surface to convert |
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[5859] | 177 | * @param hasAlpha if the newly created Surface has an alpha channel, true is returned otherwise false. |
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[5754] | 178 | * @returns a !!new!! Surface, that is loadable by openGL. |
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| 179 | */ |
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[5859] | 180 | SDL_Surface* Texture::prepareSurface(SDL_Surface* surface, bool& hasAlpha) |
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[5753] | 181 | { |
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| 182 | PRINTF(4)("Loading texture to OpenGL-Environment.\n"); |
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[5768] | 183 | |
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[5859] | 184 | SDL_Surface* retSurface; |
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[5753] | 185 | SDL_Rect area; |
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| 186 | Uint32 saved_flags; |
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| 187 | Uint8 saved_alpha; |
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[5768] | 188 | |
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[5859] | 189 | hasAlpha = false; |
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| 190 | retSurface = SDL_CreateRGBSurface(SDL_SWSURFACE, |
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[5863] | 191 | surface->w, surface->h, |
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| 192 | 32, |
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[5753] | 193 | #if SDL_BYTEORDER == SDL_LIL_ENDIAN /* OpenGL RGBA masks */ |
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[5768] | 194 | 0x000000FF, |
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| 195 | 0x0000FF00, |
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| 196 | 0x00FF0000, |
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| 197 | 0xFF000000 |
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[5753] | 198 | #else |
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[5863] | 199 | 0xFF000000, |
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[5768] | 200 | 0x00FF0000, |
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| 201 | 0x0000FF00, |
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| 202 | 0x000000FF |
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[5753] | 203 | #endif |
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[5863] | 204 | ); |
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[5859] | 205 | if ( retSurface == NULL ) |
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[5768] | 206 | { |
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[5859] | 207 | return NULL; |
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[5768] | 208 | } |
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| 209 | |
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[5753] | 210 | /* Save the alpha blending attributes */ |
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| 211 | saved_flags = surface->flags&(SDL_SRCALPHA|SDL_RLEACCELOK); |
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| 212 | saved_alpha = surface->format->alpha; |
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| 213 | if ( (saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { |
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| 214 | SDL_SetAlpha(surface, 0, 0); |
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| 215 | } |
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[5768] | 216 | |
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[5753] | 217 | /* Copy the surface into the GL texture image */ |
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| 218 | area.x = 0; |
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| 219 | area.y = 0; |
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| 220 | area.w = surface->w; |
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| 221 | area.h = surface->h; |
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[5859] | 222 | SDL_BlitSurface(surface, &area, retSurface, &area); |
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[5768] | 223 | |
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[5753] | 224 | /* Restore the alpha blending attributes */ |
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[5768] | 225 | if ( (saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) |
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| 226 | { |
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| 227 | SDL_SetAlpha(surface, saved_flags | SDL_OPENGL, saved_alpha); |
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[5859] | 228 | hasAlpha = true; |
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[5768] | 229 | } |
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| 230 | |
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[5859] | 231 | return (retSurface); |
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[5753] | 232 | } |
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| 233 | |
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| 234 | |
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| 235 | /** |
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| 236 | * Loads a Texture to the openGL-environment. |
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| 237 | * @param surface the Image to load to openGL |
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| 238 | * @returns The ID of the texture. |
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| 239 | */ |
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[5856] | 240 | GLuint Texture::loadTexToGL (const SDL_Surface* surface) |
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[5753] | 241 | { |
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[5856] | 242 | // if (this->texture != 0 && glIsTexture(this->texture)) |
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| 243 | // glDeleteTextures(1, &this->texture); |
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| 244 | // this->texture = 0; |
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[5768] | 245 | |
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[5856] | 246 | GLuint texture; |
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| 247 | |
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| 248 | if (surface == NULL) |
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[5768] | 249 | return 0; |
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| 250 | |
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[5753] | 251 | /* Create an OpenGL texture for the image */ |
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[5856] | 252 | glGenTextures(1, &texture); |
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| 253 | glBindTexture(GL_TEXTURE_2D, texture); |
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[6129] | 254 | |
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| 255 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, /*GL_LINEAR*/ GL_LINEAR_MIPMAP_LINEAR); |
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| 256 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, /*GL_LINEAR*/ GL_LINEAR); |
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| 257 | /* control the mipmap levels */ |
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| 258 | glTexParameterf(GL_TEXTURE_ENV, GL_TEXTURE_MIN_LOD, -100); |
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| 259 | glTexParameterf(GL_TEXTURE_ENV, GL_TEXTURE_MAX_LOD, 0); |
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| 260 | glTexParameterf(GL_TEXTURE_ENV, GL_TEXTURE_PRIORITY, this->priority); |
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| 261 | |
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[5753] | 262 | // build the Texture |
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| 263 | glTexImage2D(GL_TEXTURE_2D, |
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[5768] | 264 | 0, |
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| 265 | GL_RGBA, |
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[5856] | 266 | surface->w, surface->h, |
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[5768] | 267 | 0, |
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| 268 | GL_RGBA, |
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| 269 | GL_UNSIGNED_BYTE, |
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[5856] | 270 | surface->pixels); |
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[6129] | 271 | |
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| 272 | // build the MipMaps automaticaly |
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[5753] | 273 | gluBuild2DMipmaps(GL_TEXTURE_2D, |
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[5768] | 274 | GL_RGBA, |
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[5856] | 275 | surface->w, |
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| 276 | surface->h, |
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[5768] | 277 | GL_RGBA, |
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| 278 | GL_UNSIGNED_BYTE, |
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[5856] | 279 | surface->pixels); |
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[5753] | 280 | glBindTexture(GL_TEXTURE_2D, 0); |
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[5856] | 281 | return texture; |
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[5753] | 282 | } |
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[6129] | 283 | |
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