Mercurial > molko
annotate src/libmlk-core/core/texture.c @ 341:0c18acf4517e
js: add music bindings
author | David Demelier <markand@malikania.fr> |
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date | Sat, 16 Oct 2021 09:45:45 +0200 |
parents | 8f9937403749 |
children | 12367bfc2df6 |
rev | line source |
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1 /* |
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2 * texture.c -- basic texture management |
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3 * |
314 | 4 * Copyright (c) 2020-2021 David Demelier <markand@malikania.fr> |
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5 * |
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6 * Permission to use, copy, modify, and/or distribute this software for any |
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7 * purpose with or without fee is hereby granted, provided that the above |
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8 * copyright notice and this permission notice appear in all copies. |
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9 * |
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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17 */ |
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18 |
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19 #include <assert.h> |
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20 |
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21 #include "color.h" |
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22 #include "error.h" |
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23 #include "texture.h" |
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24 #include "texture_p.h" |
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25 #include "util.h" |
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26 #include "window.h" |
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27 #include "window_p.h" |
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28 |
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29 int |
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30 texture_new(struct texture *tex, unsigned int w, unsigned int h) |
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31 { |
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32 assert(tex); |
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33 |
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34 tex->handle = SDL_CreateTexture(RENDERER(), |
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35 SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, w, h); |
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36 |
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37 if (!tex->handle) { |
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38 tex->w = tex->h = 0; |
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39 return errorf("%s", SDL_GetError()); |
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40 } |
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41 |
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42 tex->w = w; |
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43 tex->h = h; |
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44 |
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45 return 0; |
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46 } |
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47 |
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48 int |
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49 texture_ok(const struct texture *tex) |
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50 { |
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51 return tex && tex->handle && tex->w && tex->h; |
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52 } |
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53 |
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54 int |
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55 texture_set_blend_mode(struct texture *tex, enum texture_blend blend) |
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56 { |
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57 assert(tex); |
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58 assert(blend >= TEXTURE_BLEND_NONE && blend <= TEXTURE_BLEND_MODULATE); |
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59 |
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60 static const SDL_BlendMode table[] = { |
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61 [TEXTURE_BLEND_NONE] = SDL_BLENDMODE_NONE, |
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62 [TEXTURE_BLEND_BLEND] = SDL_BLENDMODE_BLEND, |
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63 [TEXTURE_BLEND_ADD] = SDL_BLENDMODE_ADD, |
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64 [TEXTURE_BLEND_MODULATE] = SDL_BLENDMODE_MOD |
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65 }; |
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66 |
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67 if (SDL_SetTextureBlendMode(tex->handle, table[blend]) < 0) |
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68 return errorf("%s", SDL_GetError()); |
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69 |
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70 return 0; |
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71 } |
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72 |
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73 int |
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74 texture_set_alpha_mod(struct texture *tex, unsigned int alpha) |
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75 { |
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76 assert(texture_ok(tex)); |
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77 assert(alpha <= 255); |
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78 |
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79 if (SDL_SetTextureAlphaMod(tex->handle, alpha) < 0) |
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80 return errorf("%s", SDL_GetError()); |
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81 |
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82 return 0; |
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83 } |
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84 |
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85 int |
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86 texture_set_color_mod(struct texture *tex, unsigned long color) |
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87 { |
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88 assert(texture_ok(tex)); |
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89 |
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90 if (SDL_SetTextureColorMod(tex->handle, COLOR_R(color), COLOR_G(color), COLOR_B(color)) < 0) |
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91 return errorf("%s", SDL_GetError()); |
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92 |
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93 return 0; |
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94 } |
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95 |
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96 int |
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97 texture_draw(const struct texture *tex, int x, int y) |
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98 { |
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99 assert(tex); |
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100 |
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101 SDL_Rect dst = { |
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102 .x = x, |
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103 .y = y, |
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104 .w = tex->w, |
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105 .h = tex->h |
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106 }; |
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107 |
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108 if (SDL_RenderCopy(RENDERER(), tex->handle, NULL, &dst) < 0) |
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109 return errorf("%s", SDL_GetError()); |
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110 |
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111 return 0; |
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112 } |
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113 |
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114 int |
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115 texture_scale(const struct texture *tex, |
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116 int src_x, |
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117 int src_y, |
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118 unsigned src_w, |
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119 unsigned src_h, |
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120 int dst_x, |
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121 int dst_y, |
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122 unsigned dst_w, |
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123 unsigned dst_h, |
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124 double angle) |
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125 { |
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126 const SDL_Rect src = { |
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127 .x = src_x, |
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128 .y = src_y, |
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129 .w = src_w, |
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130 .h = src_h |
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131 }; |
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132 const SDL_Rect dst = { |
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133 .x = dst_x, |
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134 .y = dst_y, |
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135 .w = dst_w, |
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136 .h = dst_h |
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137 }; |
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138 |
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139 if (SDL_RenderCopyEx(RENDERER(), tex->handle, &src, &dst, angle, NULL, SDL_FLIP_NONE) < 0) |
169
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140 return errorf("%s", SDL_GetError()); |
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141 |
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142 return 0; |
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143 } |
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144 |
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145 void |
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146 texture_finish(struct texture *tex) |
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147 { |
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148 assert(tex); |
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149 |
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150 if (tex->handle) |
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151 SDL_DestroyTexture(tex->handle); |
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152 |
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153 memset(tex, 0, sizeof (*tex)); |
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154 } |
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155 |
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156 /* private */ |
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157 |
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158 int |
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159 texture_from_surface(struct texture *tex, SDL_Surface *surface) |
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160 { |
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161 assert(tex); |
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162 assert(surface); |
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163 |
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164 if (!(tex->handle = SDL_CreateTextureFromSurface(RENDERER(), surface))) { |
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165 tex->w = tex->h = 0; |
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166 return errorf("%s", SDL_GetError()); |
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167 } |
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168 |
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169 tex->w = surface->w; |
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170 tex->h = surface->h; |
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171 |
126
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172 SDL_FreeSurface(surface); |
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173 |
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174 return 0; |
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175 } |