Mercurial > molko
annotate libmlk-core/mlk/core/texture.c @ 547:c7664b679a95
misc: remove error codes for now
author | David Demelier <markand@malikania.fr> |
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date | Mon, 06 Mar 2023 20:03:00 +0100 |
parents | 80242343d152 |
children | 76ce31b0151f |
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1 /* |
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2 * texture.c -- basic texture management |
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3 * |
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4 * Copyright (c) 2020-2023 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 #include <string.h> |
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21 |
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22 #include "color.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 mlk_texture_new(struct mlk_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 assert(w); |
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34 assert(h); |
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35 |
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36 tex->handle = SDL_CreateTexture(MLK__RENDERER(), |
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37 SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, w, h); |
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38 |
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39 if (!tex->handle) { |
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40 tex->w = tex->h = 0; |
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41 return mlk_errf("%s", SDL_GetError()); |
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42 } |
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43 |
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44 tex->w = w; |
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45 tex->h = h; |
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46 |
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47 return 0; |
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48 } |
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49 |
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50 int |
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51 mlk_texture_ok(const struct mlk_texture *tex) |
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52 { |
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53 return tex && tex->handle && tex->w && tex->h; |
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54 } |
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55 |
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56 int |
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57 mlk_texture_set_blend_mode(struct mlk_texture *tex, enum mlk_texture_blend blend) |
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58 { |
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59 assert(tex); |
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60 assert(blend >= MLK_TEXTURE_BLEND_NONE && blend < MLK_TEXTURE_BLEND_LAST); |
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61 |
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62 static const SDL_BlendMode table[] = { |
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63 [MLK_TEXTURE_BLEND_NONE] = SDL_BLENDMODE_NONE, |
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64 [MLK_TEXTURE_BLEND_BLEND] = SDL_BLENDMODE_BLEND, |
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65 [MLK_TEXTURE_BLEND_ADD] = SDL_BLENDMODE_ADD, |
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66 [MLK_TEXTURE_BLEND_MODULATE] = SDL_BLENDMODE_MOD |
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67 }; |
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68 |
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69 if (SDL_SetTextureBlendMode(tex->handle, table[blend]) < 0) |
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70 return mlk_errf("%s", SDL_GetError()); |
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71 |
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72 return 0; |
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73 } |
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74 |
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75 int |
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76 mlk_texture_set_alpha_mod(struct mlk_texture *tex, unsigned int alpha) |
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77 { |
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78 assert(mlk_texture_ok(tex)); |
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79 assert(alpha <= 255); |
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80 |
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81 if (SDL_SetTextureAlphaMod(tex->handle, alpha) < 0) |
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82 return mlk_errf("%s", SDL_GetError()); |
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83 |
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84 return 0; |
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85 } |
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86 |
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87 int |
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88 mlk_texture_set_color_mod(struct mlk_texture *tex, unsigned long color) |
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89 { |
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90 assert(mlk_texture_ok(tex)); |
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91 |
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92 if (SDL_SetTextureColorMod(tex->handle, MLK_COLOR_R(color), MLK_COLOR_G(color), MLK_COLOR_B(color)) < 0) |
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93 return mlk_errf("%s", SDL_GetError()); |
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94 |
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95 return 0; |
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96 } |
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97 |
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98 int |
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99 mlk_texture_draw(const struct mlk_texture *tex, int x, int y) |
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100 { |
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101 assert(tex); |
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102 |
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103 SDL_Rect dst = { |
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104 .x = x, |
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105 .y = y, |
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106 .w = tex->w, |
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107 .h = tex->h |
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108 }; |
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109 |
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110 if (SDL_RenderCopy(MLK__RENDERER(), tex->handle, NULL, &dst) < 0) |
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111 return mlk_errf("%s", SDL_GetError()); |
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112 |
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113 return 0; |
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114 } |
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115 |
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116 int |
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117 mlk_texture_scale(const struct mlk_texture *tex, |
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118 int src_x, |
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119 int src_y, |
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120 unsigned src_w, |
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121 unsigned src_h, |
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122 int dst_x, |
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123 int dst_y, |
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124 unsigned dst_w, |
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125 unsigned dst_h, |
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126 double angle) |
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127 { |
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128 const SDL_Rect src = { |
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129 .x = src_x, |
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130 .y = src_y, |
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131 .w = src_w, |
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132 .h = src_h |
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133 }; |
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134 const SDL_Rect dst = { |
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135 .x = dst_x, |
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136 .y = dst_y, |
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137 .w = dst_w, |
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138 .h = dst_h |
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139 }; |
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140 |
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141 if (SDL_RenderCopyEx(MLK__RENDERER(), tex->handle, &src, &dst, angle, NULL, SDL_FLIP_NONE) < 0) |
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142 return mlk_errf("%s", SDL_GetError()); |
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143 |
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144 return 0; |
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145 } |
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146 |
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147 void |
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148 mlk_texture_finish(struct mlk_texture *tex) |
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149 { |
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150 assert(tex); |
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151 |
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152 if (tex->handle) |
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153 SDL_DestroyTexture(tex->handle); |
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154 |
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155 memset(tex, 0, sizeof (*tex)); |
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156 } |
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157 |
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158 /* private */ |
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159 |
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160 int |
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161 mlk__texture_from_surface(struct mlk_texture *tex, SDL_Surface *surface) |
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162 { |
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163 assert(tex); |
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164 assert(surface); |
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165 |
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166 if (!(tex->handle = SDL_CreateTextureFromSurface(MLK__RENDERER(), surface))) { |
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167 tex->w = tex->h = 0; |
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168 return mlk_errf("%s", SDL_GetError()); |
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169 } |
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170 |
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171 tex->w = surface->w; |
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172 tex->h = surface->h; |
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173 |
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174 SDL_FreeSurface(surface); |
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175 |
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176 return 0; |
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177 } |