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annotate libmlk-core/mlk/core/texture.c @ 646:7e1eb7f6c049 default tip @

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misc: remove .clang
author David Demelier <markand@malikania.fr>
date Sun, 04 Feb 2024 15:24:37 +0100
parents e16808365d42
children
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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 "err.h"
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24 #include "texture.h"
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25 #include "texture_p.h"
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26 #include "util.h"
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27 #include "window.h"
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28 #include "window_p.h"
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29
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30 int
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31 mlk_texture_init(struct mlk_texture *tex, unsigned int w, unsigned int h)
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32 {
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33 assert(tex);
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34 assert(w);
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35 assert(h);
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36
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37 tex->handle = SDL_CreateTexture(MLK__RENDERER(),
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38 SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, w, h);
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39
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40 if (!tex->handle) {
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41 tex->w = tex->h = 0;
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42 return mlk_errf("%s", SDL_GetError());
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43 }
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45 tex->w = w;
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46 tex->h = h;
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47
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48 return 0;
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49 }
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50
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51 int
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52 mlk_texture_set_blend_mode(struct mlk_texture *tex, enum mlk_texture_blend blend)
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53 {
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54 assert(tex);
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55 assert(blend >= MLK_TEXTURE_BLEND_NONE && blend < MLK_TEXTURE_BLEND_LAST);
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56
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57 static const SDL_BlendMode table[] = {
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58 [MLK_TEXTURE_BLEND_NONE] = SDL_BLENDMODE_NONE,
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59 [MLK_TEXTURE_BLEND_BLEND] = SDL_BLENDMODE_BLEND,
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60 [MLK_TEXTURE_BLEND_ADD] = SDL_BLENDMODE_ADD,
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61 [MLK_TEXTURE_BLEND_MODULATE] = SDL_BLENDMODE_MOD
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62 };
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64 if (SDL_SetTextureBlendMode(tex->handle, table[blend]) < 0)
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65 return mlk_errf("%s", SDL_GetError());
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66
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67 return 0;
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68 }
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69
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70 int
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71 mlk_texture_set_alpha_mod(struct mlk_texture *tex, unsigned int alpha)
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72 {
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73 assert(tex);
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74 assert(alpha <= 255);
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75
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76 if (SDL_SetTextureAlphaMod(tex->handle, alpha) < 0)
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77 return mlk_errf("%s", SDL_GetError());
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78
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79 return 0;
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80 }
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81
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82 int
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83 mlk_texture_set_color_mod(struct mlk_texture *tex, unsigned long color)
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84 {
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85 assert(tex);
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86
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87 if (SDL_SetTextureColorMod(tex->handle, MLK_COLOR_R(color), MLK_COLOR_G(color), MLK_COLOR_B(color)) < 0)
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88 return mlk_errf("%s", SDL_GetError());
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89
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90 return 0;
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91 }
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92
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93 int
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94 mlk_texture_draw(const struct mlk_texture *tex, int x, int y)
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95 {
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96 assert(tex);
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97
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98 SDL_FRect dst = {
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99 .x = x,
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100 .y = y,
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101 .w = tex->w,
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102 .h = tex->h
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103 };
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104
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105 if (SDL_RenderTexture(MLK__RENDERER(), tex->handle, NULL, &dst) < 0)
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106 return mlk_errf("%s", SDL_GetError());
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107
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108 return 0;
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109 }
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110
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111 int
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112 mlk_texture_scale(const struct mlk_texture *tex,
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113 int src_x,
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114 int src_y,
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115 unsigned src_w,
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116 unsigned src_h,
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117 int dst_x,
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118 int dst_y,
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119 unsigned dst_w,
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120 unsigned dst_h,
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121 double angle)
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122 {
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123 const SDL_FRect src = {
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124 .x = src_x,
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125 .y = src_y,
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126 .w = src_w,
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127 .h = src_h
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128 };
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129 const SDL_FRect dst = {
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130 .x = dst_x,
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131 .y = dst_y,
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132 .w = dst_w,
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133 .h = dst_h
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134 };
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135
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136 if (SDL_RenderTextureRotated(MLK__RENDERER(), tex->handle, &src, &dst, angle, NULL, SDL_FLIP_NONE) < 0)
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137 return mlk_errf("%s", SDL_GetError());
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138
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139 return 0;
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140 }
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141
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142 void
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143 mlk_texture_finish(struct mlk_texture *tex)
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144 {
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145 assert(tex);
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146
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147 if (tex->handle)
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148 SDL_DestroyTexture(tex->handle);
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149
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150 memset(tex, 0, sizeof (*tex));
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151 }
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152
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153 /* private */
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154
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155 int
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156 mlk__texture_from_surface(struct mlk_texture *tex, SDL_Surface *surface)
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157 {
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158 assert(tex);
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159 assert(surface);
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160
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161 if (!(tex->handle = SDL_CreateTextureFromSurface(MLK__RENDERER(), surface))) {
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162 tex->w = tex->h = 0;
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163 return mlk_errf("%s", SDL_GetError());
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164 }
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165
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166 tex->w = surface->w;
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167 tex->h = surface->h;
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168
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169 SDL_DestroySurface(surface);
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170
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171 return 0;
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172 }