1 | // |
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2 | // Lol Engine |
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3 | // |
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4 | // Copyright: (c) 2010-2011 Sam Hocevar <sam@hocevar.net> |
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5 | // This program is free software; you can redistribute it and/or |
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6 | // modify it under the terms of the Do What The Fuck You Want To |
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7 | // Public License, Version 2, as published by Sam Hocevar. See |
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8 | // http://sam.zoy.org/projects/COPYING.WTFPL for more details. |
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9 | // |
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10 | |
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11 | #if defined HAVE_CONFIG_H |
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12 | # include "config.h" |
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13 | #endif |
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14 | |
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15 | #include <cstdlib> |
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16 | #include <cstdio> |
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17 | #include <cmath> |
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18 | |
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19 | #ifdef WIN32 |
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20 | # define WIN32_LEAN_AND_MEAN |
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21 | # include <windows.h> |
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22 | #endif |
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23 | |
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24 | #if defined USE_SDL |
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25 | # include <SDL.h> |
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26 | # include <SDL_image.h> |
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27 | #endif |
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28 | |
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29 | #include "core.h" |
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30 | #include "lolgl.h" |
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31 | |
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32 | namespace lol |
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33 | { |
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34 | |
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35 | /* |
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36 | * TileSet implementation class |
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37 | */ |
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38 | |
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39 | class TileSetData |
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40 | { |
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41 | friend class TileSet; |
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42 | |
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43 | private: |
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44 | char *name, *path; |
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45 | int *tiles, ntiles; |
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46 | vec2i size, count; |
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47 | float dilate, tx, ty; |
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48 | |
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49 | #if defined USE_SDL |
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50 | SDL_Surface *img; |
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51 | #endif |
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52 | GLuint texture; |
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53 | }; |
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54 | |
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55 | /* |
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56 | * Public TileSet class |
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57 | */ |
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58 | |
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59 | TileSet::TileSet(char const *path, vec2i size, vec2i count, float dilate) |
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60 | : data(new TileSetData()) |
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61 | { |
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62 | data->name = (char *)malloc(10 + strlen(path) + 1); |
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63 | data->path = data->name + 10; |
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64 | sprintf(data->name, "<tileset> %s", path); |
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65 | |
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66 | data->tiles = NULL; |
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67 | #if defined USE_SDL |
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68 | data->img = NULL; |
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69 | #endif |
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70 | data->texture = 0; |
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71 | |
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72 | #if defined USE_SDL |
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73 | for (char const *name = path; *name; name++) |
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74 | if ((data->img = IMG_Load(name))) |
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75 | break; |
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76 | |
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77 | if (!data->img) |
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78 | { |
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79 | #if !LOL_RELEASE |
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80 | fprintf(stderr, "ERROR: could not load %s\n", path); |
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81 | #endif |
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82 | SDL_Quit(); |
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83 | exit(1); |
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84 | } |
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85 | |
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86 | if (count.i > 0 && count.j > 0) |
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87 | { |
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88 | data->count = count; |
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89 | data->size = vec2i(data->img->w, data->img->h) / count; |
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90 | } |
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91 | else |
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92 | { |
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93 | if (size.x <= 0 || size.y <= 0) |
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94 | size = 32; |
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95 | data->count.i = data->img->w > size.i ? data->img->w / size.i : 1; |
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96 | data->count.j = data->img->h > size.j ? data->img->h / size.j : 1; |
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97 | data->size = size; |
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98 | } |
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99 | |
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100 | data->tx = (float)data->size.x / PotUp(data->img->w); |
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101 | data->ty = (float)data->size.y / PotUp(data->img->h); |
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102 | #endif |
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103 | |
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104 | data->dilate = dilate; |
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105 | data->ntiles = data->count.i * data->count.j; |
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106 | |
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107 | drawgroup = DRAWGROUP_BEFORE; |
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108 | } |
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109 | |
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110 | TileSet::~TileSet() |
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111 | { |
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112 | free(data->tiles); |
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113 | free(data->name); |
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114 | delete data; |
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115 | } |
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116 | |
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117 | void TileSet::TickDraw(float deltams) |
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118 | { |
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119 | Entity::TickDraw(deltams); |
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120 | |
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121 | #if defined USE_SDL |
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122 | if (IsDestroying()) |
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123 | { |
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124 | if (data->img) |
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125 | SDL_FreeSurface(data->img); |
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126 | else |
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127 | glDeleteTextures(1, &data->texture); |
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128 | } |
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129 | else if (data->img) |
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130 | { |
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131 | GLuint format = data->img->format->Amask ? GL_RGBA : GL_RGB; |
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132 | int planes = data->img->format->Amask ? 4 : 3; |
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133 | |
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134 | int w = PotUp(data->img->w); |
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135 | int h = PotUp(data->img->h); |
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136 | |
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137 | uint8_t *pixels = (uint8_t *)data->img->pixels; |
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138 | if (w != data->img->w || h != data->img->h) |
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139 | { |
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140 | uint8_t *tmp = (uint8_t *)malloc(planes * w * h); |
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141 | for (int line = 0; line < data->img->h; line++) |
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142 | memcpy(tmp + planes * w * line, |
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143 | pixels + planes * data->img->w * line, |
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144 | planes * data->img->w); |
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145 | pixels = tmp; |
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146 | } |
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147 | |
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148 | glGenTextures(1, &data->texture); |
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149 | glBindTexture(GL_TEXTURE_2D, data->texture); |
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150 | |
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151 | glTexImage2D(GL_TEXTURE_2D, 0, planes, w, h, 0, |
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152 | format, GL_UNSIGNED_BYTE, pixels); |
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153 | |
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154 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
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155 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
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156 | |
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157 | if (pixels != data->img->pixels) |
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158 | free(pixels); |
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159 | SDL_FreeSurface(data->img); |
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160 | data->img = NULL; |
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161 | } |
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162 | #endif |
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163 | } |
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164 | |
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165 | char const *TileSet::GetName() |
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166 | { |
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167 | return data->name; |
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168 | } |
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169 | |
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170 | vec2i TileSet::GetSize() const |
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171 | { |
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172 | return data->size; |
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173 | } |
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174 | |
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175 | vec2i TileSet::GetCount() const |
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176 | { |
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177 | return data->count; |
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178 | } |
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179 | |
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180 | void TileSet::Bind() |
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181 | { |
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182 | #if defined USE_SDL |
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183 | if (!data->img) |
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184 | glBindTexture(GL_TEXTURE_2D, data->texture); |
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185 | #endif |
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186 | } |
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187 | |
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188 | void TileSet::BlitTile(uint32_t id, int x, int y, int z, int o, |
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189 | float *vertex, float *texture) |
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190 | { |
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191 | float tx = data->tx * ((id & 0xffff) % data->count.i); |
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192 | float ty = data->ty * ((id & 0xffff) / data->count.i); |
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193 | float dilate = data->dilate; |
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194 | |
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195 | int dx = data->size.x; |
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196 | int dy = o ? 0 : data->size.y; |
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197 | int dz = o ? data->size.y : 0; |
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198 | |
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199 | #if defined USE_SDL |
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200 | if (!data->img) |
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201 | { |
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202 | float tmp[10]; |
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203 | |
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204 | *vertex++ = tmp[0] = x; |
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205 | *vertex++ = tmp[1] = dilate * (y + dy); |
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206 | *vertex++ = tmp[2] = dilate * (z + dz); |
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207 | *texture++ = tmp[3] = tx; |
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208 | *texture++ = tmp[4] = ty; |
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209 | |
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210 | *vertex++ = x + dx; |
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211 | *vertex++ = dilate * (y + dy); |
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212 | *vertex++ = dilate * (z + dz); |
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213 | *texture++ = tx + data->tx; |
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214 | *texture++ = ty; |
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215 | |
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216 | *vertex++ = tmp[5] = x + dx; |
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217 | *vertex++ = tmp[6] = dilate * y; |
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218 | *vertex++ = tmp[7] = dilate * z; |
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219 | *texture++ = tmp[8] = tx + data->tx; |
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220 | *texture++ = tmp[9] = ty + data->ty; |
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221 | |
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222 | *vertex++ = tmp[0]; |
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223 | *vertex++ = tmp[1]; |
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224 | *vertex++ = tmp[2]; |
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225 | *texture++ = tmp[3]; |
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226 | *texture++ = tmp[4]; |
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227 | |
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228 | *vertex++ = tmp[5]; |
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229 | *vertex++ = tmp[6]; |
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230 | *vertex++ = tmp[7]; |
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231 | *texture++ = tmp[8]; |
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232 | *texture++ = tmp[9]; |
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233 | |
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234 | *vertex++ = x; |
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235 | *vertex++ = dilate * y; |
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236 | *vertex++ = dilate * z; |
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237 | *texture++ = tx; |
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238 | *texture++ = ty + data->ty; |
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239 | } |
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240 | else |
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241 | #endif |
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242 | { |
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243 | memset(vertex, 0, 3 * sizeof(float)); |
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244 | memset(texture, 0, 2 * sizeof(float)); |
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245 | } |
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246 | } |
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247 | |
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248 | } /* namespace lol */ |
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249 | |
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