1 | // |
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2 | // Deus Hax (working title) |
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3 | // Copyright (c) 2010 Sam Hocevar <sam@hocevar.net> |
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4 | // |
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5 | |
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6 | #if defined HAVE_CONFIG_H |
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7 | # include "config.h" |
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8 | #endif |
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9 | |
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10 | #include <cstdlib> |
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11 | #include <cmath> |
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12 | |
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13 | #ifdef WIN32 |
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14 | # define WIN32_LEAN_AND_MEAN |
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15 | # include <windows.h> |
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16 | #endif |
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17 | #if defined __APPLE__ && defined __MACH__ |
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18 | # include <OpenGL/gl.h> |
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19 | #else |
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20 | # define GL_GLEXT_PROTOTYPES |
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21 | # include <GL/gl.h> |
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22 | #endif |
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23 | |
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24 | #include <SDL.h> |
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25 | #include <SDL_image.h> |
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26 | |
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27 | #include "core.h" |
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28 | |
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29 | /* |
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30 | * TileSet implementation class |
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31 | */ |
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32 | |
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33 | class TileSetData |
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34 | { |
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35 | friend class TileSet; |
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36 | |
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37 | private: |
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38 | char *name; |
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39 | int *tiles; |
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40 | int nw, nh, ntiles; |
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41 | float tx, ty; |
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42 | |
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43 | SDL_Surface *img; |
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44 | GLuint texture; |
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45 | }; |
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46 | |
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47 | /* |
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48 | * Public TileSet class |
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49 | */ |
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50 | |
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51 | TileSet::TileSet(char const *path) |
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52 | { |
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53 | data = new TileSetData(); |
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54 | data->name = strdup(path); |
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55 | data->tiles = NULL; |
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56 | data->img = NULL; |
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57 | data->texture = 0; |
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58 | |
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59 | for (char const *name = path; *name; name++) |
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60 | if ((data->img = IMG_Load(name))) |
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61 | break; |
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62 | |
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63 | if (!data->img) |
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64 | { |
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65 | SDL_Quit(); |
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66 | exit(1); |
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67 | } |
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68 | |
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69 | data->nw = data->img->w / 32; |
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70 | data->nh = data->img->h / 32; |
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71 | data->ntiles = data->nw * data->nh; |
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72 | data->tx = 32.0f / data->img->w; |
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73 | data->ty = 32.0f / data->img->h; |
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74 | |
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75 | drawgroup = DRAWGROUP_BEFORE; |
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76 | } |
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77 | |
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78 | TileSet::~TileSet() |
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79 | { |
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80 | free(data->tiles); |
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81 | free(data->name); |
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82 | delete data; |
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83 | } |
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84 | |
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85 | void TileSet::TickDraw(float deltams) |
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86 | { |
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87 | Entity::TickDraw(deltams); |
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88 | |
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89 | if (destroy) |
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90 | { |
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91 | if (data->img) |
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92 | SDL_FreeSurface(data->img); |
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93 | else |
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94 | glDeleteTextures(1, &data->texture); |
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95 | } |
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96 | else if (data->img) |
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97 | { |
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98 | glGenTextures(1, &data->texture); |
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99 | glBindTexture(GL_TEXTURE_2D, data->texture); |
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100 | |
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101 | glTexImage2D(GL_TEXTURE_2D, 0, 4, data->img->w, data->img->h, 0, |
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102 | GL_RGBA, GL_UNSIGNED_BYTE, data->img->pixels); |
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103 | |
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104 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
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105 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
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106 | |
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107 | SDL_FreeSurface(data->img); |
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108 | data->img = NULL; |
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109 | } |
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110 | } |
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111 | |
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112 | char const *TileSet::GetName() |
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113 | { |
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114 | return data->name; |
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115 | } |
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116 | |
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117 | void TileSet::BlitTile(uint32_t id, int x, int y, int z, int o) |
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118 | { |
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119 | float tx = data->tx * ((id & 0xffff) % data->nw); |
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120 | float ty = data->ty * ((id & 0xffff) / data->nw); |
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121 | |
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122 | float sqrt2 = sqrtf(2.0f); |
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123 | int off = o ? 32 : 0; |
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124 | |
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125 | if (!data->img) |
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126 | { |
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127 | glBindTexture(GL_TEXTURE_2D, data->texture); |
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128 | glBegin(GL_QUADS); |
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129 | glTexCoord2f(tx, ty); |
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130 | glVertex3f(x, sqrt2 * (y - 38 - off), sqrt2 * (z + off)); |
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131 | glTexCoord2f(tx + data->tx, ty); |
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132 | glVertex3f(x + 32, sqrt2 * (y - 38 - off), sqrt2 * (z + off)); |
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133 | glTexCoord2f(tx + data->tx, ty + data->ty); |
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134 | glVertex3f(x + 32, sqrt2 * (y - 70), sqrt2 * z); |
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135 | glTexCoord2f(tx, ty + data->ty); |
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136 | glVertex3f(x, sqrt2 * (y - 70), sqrt2 * z); |
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137 | glEnd(); |
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138 | } |
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139 | } |
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140 | |
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