1 | |
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2 | #ifdef WIN32 |
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3 | # define WIN32_LEAN_AND_MEAN |
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4 | # include <windows.h> |
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5 | #endif |
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6 | #if defined __APPLE__ && defined __MACH__ |
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7 | # include <OpenGL/gl.h> |
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8 | #else |
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9 | # define GL_GLEXT_PROTOTYPES |
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10 | # include <GL/gl.h> |
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11 | # include <GL/glext.h> |
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12 | #endif |
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13 | |
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14 | #include <SDL.h> |
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15 | #include <SDL_image.h> |
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16 | |
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17 | #include <malloc.h> |
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18 | |
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19 | #include "tileset.h" |
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20 | |
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21 | /* |
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22 | * TileSet implementation class |
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23 | */ |
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24 | |
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25 | class TileSetData |
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26 | { |
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27 | friend class TileSet; |
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28 | |
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29 | private: |
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30 | static int Compare(void const *p1, void const *p2) |
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31 | { |
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32 | int const *n1 = (int const *)p1; |
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33 | int const *n2 = (int const *)p2; |
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34 | |
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35 | return n1[2] + 32 * n1[3] - (n2[2] + 32 * n2[3]); |
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36 | } |
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37 | |
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38 | char *name; |
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39 | int ref; |
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40 | int *tiles; |
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41 | int ntiles; |
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42 | |
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43 | GLuint texture[1]; |
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44 | }; |
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45 | |
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46 | /* |
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47 | * Public TileSet class |
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48 | */ |
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49 | |
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50 | TileSet::TileSet(char const *path) |
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51 | { |
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52 | SDL_Surface *img = NULL; |
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53 | |
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54 | data = new TileSetData(); |
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55 | data->name = strdup(path); |
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56 | data->ref = 0; |
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57 | data->tiles = NULL; |
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58 | data->ntiles = 0; |
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59 | |
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60 | /* One tile texture */ |
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61 | for (char const *name = path; *name; name++) |
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62 | if ((img = IMG_Load(name))) |
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63 | break; |
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64 | |
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65 | if (!img) |
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66 | { |
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67 | SDL_Quit(); |
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68 | exit(1); |
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69 | } |
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70 | |
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71 | glGenTextures(1, data->texture); |
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72 | glBindTexture(GL_TEXTURE_2D, data->texture[0]); |
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73 | |
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74 | glTexImage2D(GL_TEXTURE_2D, 0, 4, img->w, img->h, 0, |
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75 | GL_RGBA, GL_UNSIGNED_BYTE, img->pixels); |
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76 | |
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77 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
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78 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
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79 | } |
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80 | |
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81 | TileSet::~TileSet() |
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82 | { |
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83 | glDeleteTextures(1, data->texture); |
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84 | |
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85 | free(data->tiles); |
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86 | free(data->name); |
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87 | delete data; |
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88 | } |
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89 | |
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90 | void TileSet::Ref() |
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91 | { |
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92 | data->ref++; |
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93 | } |
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94 | |
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95 | int TileSet::Unref() |
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96 | { |
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97 | return --data->ref; |
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98 | } |
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99 | |
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100 | char const *TileSet::GetName() |
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101 | { |
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102 | return data->name; |
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103 | } |
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104 | |
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105 | void TileSet::BlitTile(uint32_t id, int x, int y) |
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106 | { |
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107 | float tx = .0625f * (id & 0xf); |
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108 | float ty = .0625f * ((id >> 4) & 0xf); |
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109 | |
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110 | glBindTexture(GL_TEXTURE_2D, data->texture[0]); |
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111 | glBegin(GL_QUADS); |
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112 | glTexCoord2f(tx, ty); |
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113 | glVertex2f(x, y); |
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114 | glTexCoord2f(tx + .0625f, ty); |
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115 | glVertex2f(x + 32, y); |
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116 | glTexCoord2f(tx + .0625f, ty + .0625f); |
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117 | glVertex2f(x + 32, y + 32); |
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118 | glTexCoord2f(tx, ty + .0625f); |
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119 | glVertex2f(x, y + 32); |
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120 | glEnd(); |
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121 | } |
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122 | |
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