Mercurial > sdl-ios-xcode
annotate src/video/SDL_shape.c @ 4861:b67815cf9f25
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author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 22 Aug 2010 12:43:27 -0700 |
parents | 8f1994e8d886 4201864f77e7 |
children | 58265e606e4e |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 2010 Eli Gottlieb |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Lesser General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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18 |
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19 Eli Gottlieb |
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20 eligottlieb@gmail.com |
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21 */ |
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22 #include "SDL_config.h" |
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23 |
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24 #include "SDL.h" |
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25 #include "SDL_assert.h" |
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26 #include "SDL_video.h" |
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27 #include "SDL_sysvideo.h" |
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28 #include "SDL_pixels.h" |
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29 #include "SDL_surface.h" |
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30 #include "SDL_shape.h" |
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31 #include "SDL_shape_internals.h" |
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32 |
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33 SDL_Window* |
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34 SDL_CreateShapedWindow(const char *title,unsigned int x,unsigned int y,unsigned int w,unsigned int h,Uint32 flags) { |
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35 SDL_Window *result = NULL; |
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36 result = SDL_CreateWindow(title,-1000,-1000,w,h,(flags | SDL_WINDOW_BORDERLESS) & (~SDL_WINDOW_FULLSCREEN) & (~SDL_WINDOW_RESIZABLE) /*& (~SDL_WINDOW_SHOWN)*/); |
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37 if(result != NULL) { |
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38 result->shaper = result->display->device->shape_driver.CreateShaper(result); |
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39 if(result->shaper != NULL) { |
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40 result->shaper->userx = x; |
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41 result->shaper->usery = y; |
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42 result->shaper->mode.mode = ShapeModeDefault; |
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43 result->shaper->mode.parameters.binarizationCutoff = 1; |
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44 result->shaper->hasshape = SDL_FALSE; |
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45 return result; |
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46 } |
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47 else { |
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48 SDL_DestroyWindow(result); |
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49 return NULL; |
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50 } |
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51 } |
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52 else |
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53 return NULL; |
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54 } |
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55 |
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56 SDL_bool |
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57 SDL_IsShapedWindow(const SDL_Window *window) { |
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58 if(window == NULL) |
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59 return SDL_FALSE; |
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60 else |
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61 return (SDL_bool)(window->shaper != NULL); |
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62 } |
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63 |
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64 /* REQUIRES that bitmap point to a w-by-h bitmap with ppb pixels-per-byte. */ |
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65 void |
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66 SDL_CalculateShapeBitmap(SDL_WindowShapeMode mode,SDL_Surface *shape,Uint8* bitmap,Uint8 ppb) { |
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67 int x = 0; |
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68 int y = 0; |
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69 Uint8 r = 0,g = 0,b = 0,alpha = 0; |
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70 Uint8* pixel = NULL; |
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71 Uint32 bitmap_pixel,pixel_value = 0,mask_value = 0; |
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72 SDL_Color key; |
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73 if(SDL_MUSTLOCK(shape)) |
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74 SDL_LockSurface(shape); |
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75 pixel = (Uint8*)shape->pixels; |
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76 for(y = 0;y<shape->h;y++) { |
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77 for(x=0;x<shape->w;x++) { |
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78 alpha = 0; |
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79 pixel_value = 0; |
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80 pixel = (Uint8 *)(shape->pixels) + (y*shape->pitch) + (x*shape->format->BytesPerPixel); |
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81 switch(shape->format->BytesPerPixel) { |
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82 case(1): |
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83 pixel_value = *(Uint8*)pixel; |
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84 break; |
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85 case(2): |
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86 pixel_value = *(Uint16*)pixel; |
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87 break; |
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88 case(3): |
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89 pixel_value = *(Uint32*)pixel & (~shape->format->Amask); |
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90 break; |
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91 case(4): |
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92 pixel_value = *(Uint32*)pixel; |
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93 break; |
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94 } |
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95 SDL_GetRGBA(pixel_value,shape->format,&r,&g,&b,&alpha); |
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96 bitmap_pixel = y*shape->w + x; |
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97 switch(mode.mode) { |
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98 case(ShapeModeDefault): |
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99 mask_value = (alpha >= 1 ? 1 : 0); |
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100 break; |
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101 case(ShapeModeBinarizeAlpha): |
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102 mask_value = (alpha >= mode.parameters.binarizationCutoff ? 1 : 0); |
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103 break; |
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104 case(ShapeModeReverseBinarizeAlpha): |
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105 mask_value = (alpha <= mode.parameters.binarizationCutoff ? 1 : 0); |
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106 break; |
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107 case(ShapeModeColorKey): |
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108 key = mode.parameters.colorKey; |
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109 mask_value = ((key.r != r || key.g != g || key.b != b) ? 1 : 0); |
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110 break; |
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111 } |
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112 bitmap[bitmap_pixel / ppb] |= mask_value << (7 - ((ppb - 1) - (bitmap_pixel % ppb))); |
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113 } |
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114 } |
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115 if(SDL_MUSTLOCK(shape)) |
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116 SDL_UnlockSurface(shape); |
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117 } |
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118 |
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119 SDL_ShapeTree* |
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120 RecursivelyCalculateShapeTree(SDL_WindowShapeMode mode,SDL_Surface* mask,SDL_Rect dimensions) { |
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121 int x = 0,y = 0; |
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122 Uint8* pixel = NULL; |
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123 Uint32 pixel_value = 0; |
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124 Uint8 r = 0,g = 0,b = 0,a = 0; |
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125 SDL_bool pixel_opaque = SDL_FALSE; |
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126 int last_opaque = -1; |
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127 SDL_Color key; |
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128 SDL_ShapeTree* result = (SDL_ShapeTree*)SDL_malloc(sizeof(SDL_ShapeTree)); |
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129 SDL_Rect next = {0,0,0,0}; |
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130 for(y=dimensions.y;y<dimensions.y + dimensions.h;y++) { |
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131 for(x=dimensions.x;x<dimensions.x + dimensions.w;x++) { |
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132 pixel_value = 0; |
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133 pixel = (Uint8 *)(mask->pixels) + (y*mask->pitch) + (x*mask->format->BytesPerPixel); |
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134 switch(mask->format->BytesPerPixel) { |
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135 case(1): |
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136 pixel_value = *(Uint8*)pixel; |
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137 break; |
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138 case(2): |
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139 pixel_value = *(Uint16*)pixel; |
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140 break; |
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141 case(3): |
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142 pixel_value = *(Uint32*)pixel & (~mask->format->Amask); |
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143 break; |
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144 case(4): |
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145 pixel_value = *(Uint32*)pixel; |
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146 break; |
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147 } |
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148 SDL_GetRGBA(pixel_value,mask->format,&r,&g,&b,&a); |
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149 switch(mode.mode) { |
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150 case(ShapeModeDefault): |
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151 pixel_opaque = (a >= 1 ? SDL_TRUE : SDL_FALSE); |
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152 break; |
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153 case(ShapeModeBinarizeAlpha): |
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154 pixel_opaque = (a >= mode.parameters.binarizationCutoff ? SDL_TRUE : SDL_FALSE); |
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155 break; |
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156 case(ShapeModeReverseBinarizeAlpha): |
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157 pixel_opaque = (a <= mode.parameters.binarizationCutoff ? SDL_TRUE : SDL_FALSE); |
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158 break; |
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159 case(ShapeModeColorKey): |
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160 key = mode.parameters.colorKey; |
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161 pixel_opaque = ((key.r != r || key.g != g || key.b != b) ? SDL_TRUE : SDL_FALSE); |
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162 break; |
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163 } |
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164 if(last_opaque == -1) |
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165 last_opaque = pixel_opaque; |
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166 if(last_opaque != pixel_opaque) { |
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167 result->kind = QuadShape; |
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168 //These will stay the same. |
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169 next.w = dimensions.w / 2; |
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170 next.h = dimensions.h / 2; |
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171 //These will change from recursion to recursion. |
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172 next.x = dimensions.x; |
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173 next.y = dimensions.y; |
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174 result->data.children.upleft = (struct SDL_ShapeTree *)RecursivelyCalculateShapeTree(mode,mask,next); |
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175 next.x += next.w; |
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176 //Unneeded: next.y = dimensions.y; |
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177 result->data.children.upright = (struct SDL_ShapeTree *)RecursivelyCalculateShapeTree(mode,mask,next); |
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178 next.x = dimensions.x; |
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179 next.y += next.h; |
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180 result->data.children.downleft = (struct SDL_ShapeTree *)RecursivelyCalculateShapeTree(mode,mask,next); |
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181 next.x += next.w; |
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182 //Unneeded: next.y = dimensions.y + dimensions.h /2; |
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183 result->data.children.downright = (struct SDL_ShapeTree *)RecursivelyCalculateShapeTree(mode,mask,next); |
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184 return result; |
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185 } |
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186 } |
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187 } |
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188 //If we never recursed, all the pixels in this quadrant have the same "value". |
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189 result->kind = (last_opaque == SDL_TRUE ? OpaqueShape : TransparentShape); |
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190 result->data.shape = dimensions; |
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191 return result; |
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192 } |
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193 |
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194 SDL_ShapeTree* |
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195 SDL_CalculateShapeTree(SDL_WindowShapeMode mode,SDL_Surface* shape) { |
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196 SDL_Rect dimensions = {0,0,shape->w,shape->h}; |
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197 SDL_ShapeTree* result = NULL; |
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198 if(SDL_MUSTLOCK(shape)) |
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199 SDL_LockSurface(shape); |
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200 result = RecursivelyCalculateShapeTree(mode,shape,dimensions); |
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201 if(SDL_MUSTLOCK(shape)) |
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202 SDL_UnlockSurface(shape); |
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203 return result; |
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204 } |
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205 |
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206 void |
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207 SDL_TraverseShapeTree(SDL_ShapeTree *tree,SDL_TraversalFunction function,void* closure) { |
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208 SDL_assert(tree != NULL); |
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209 if(tree->kind == QuadShape) { |
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210 SDL_TraverseShapeTree((SDL_ShapeTree *)tree->data.children.upleft,function,closure); |
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211 SDL_TraverseShapeTree((SDL_ShapeTree *)tree->data.children.upright,function,closure); |
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212 SDL_TraverseShapeTree((SDL_ShapeTree *)tree->data.children.downleft,function,closure); |
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213 SDL_TraverseShapeTree((SDL_ShapeTree *)tree->data.children.downright,function,closure); |
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214 } |
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215 else |
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216 function(tree,closure); |
4813
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217 } |
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218 |
4843
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219 void |
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14870d46ee2d
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220 SDL_FreeShapeTree(SDL_ShapeTree** shape_tree) { |
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221 if((*shape_tree)->kind == QuadShape) { |
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Mostly seem to have fixed SDL_CalculateShapeTree. Mostly. There still seem to be some rendering artifacts, stepping effects, and such on Windows -- which indicates subtle logic errors in SDL_CalculateShapeTree().
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222 SDL_FreeShapeTree((SDL_ShapeTree **)&(*shape_tree)->data.children.upleft); |
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Mostly seem to have fixed SDL_CalculateShapeTree. Mostly. There still seem to be some rendering artifacts, stepping effects, and such on Windows -- which indicates subtle logic errors in SDL_CalculateShapeTree().
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223 SDL_FreeShapeTree((SDL_ShapeTree **)&(*shape_tree)->data.children.upright); |
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Mostly seem to have fixed SDL_CalculateShapeTree. Mostly. There still seem to be some rendering artifacts, stepping effects, and such on Windows -- which indicates subtle logic errors in SDL_CalculateShapeTree().
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224 SDL_FreeShapeTree((SDL_ShapeTree **)&(*shape_tree)->data.children.downleft); |
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225 SDL_FreeShapeTree((SDL_ShapeTree **)&(*shape_tree)->data.children.downright); |
4843
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226 } |
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Mostly seem to have fixed SDL_CalculateShapeTree. Mostly. There still seem to be some rendering artifacts, stepping effects, and such on Windows -- which indicates subtle logic errors in SDL_CalculateShapeTree().
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227 SDL_free(*shape_tree); |
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Mostly seem to have fixed SDL_CalculateShapeTree. Mostly. There still seem to be some rendering artifacts, stepping effects, and such on Windows -- which indicates subtle logic errors in SDL_CalculateShapeTree().
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228 *shape_tree = NULL; |
4813
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229 } |
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Wrote out the system for breaking shape-masks into quad-trees of rectangles, and added code to conglomerate those quad-trees of rectangles into regions for setting shapes under Win32.
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230 |
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Fixed formatting of SDL_shape.c post-merge again.
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231 int |
4847 | 232 SDL_SetWindowShape(SDL_Window *window,SDL_Surface *shape,SDL_WindowShapeMode *shape_mode) { |
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Fixed formatting of SDL_shape.c post-merge again.
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233 int result; |
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234 if(window == NULL || !SDL_IsShapedWindow(window)) |
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235 //The window given was not a shapeable window. |
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Fixed formatting of SDL_shape.c post-merge again.
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236 return SDL_NONSHAPEABLE_WINDOW; |
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237 if(shape == NULL) |
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238 //Invalid shape argument. |
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239 return SDL_INVALID_SHAPE_ARGUMENT; |
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Fixed formatting of SDL_shape.c post-merge again.
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240 |
4847 | 241 if(shape_mode != NULL) |
242 window->shaper->mode = *shape_mode; | |
243 result = window->display->device->shape_driver.SetWindowShape(window->shaper,shape,shape_mode); | |
4843
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Fixed formatting of SDL_shape.c post-merge again.
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244 window->shaper->hasshape = SDL_TRUE; |
4852
c19c729eb201
Added hiding-as-positioning trick and finally fixed flags.
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4851
diff
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245 if(window->shaper->userx != 0 && window->shaper->usery != 0) { |
4851
5624fb0190b5
Changed flags and positioning (for the fake-hiding) as Andreas recommended.
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246 SDL_SetWindowPosition(window,window->shaper->userx,window->shaper->usery); |
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Changed flags and positioning (for the fake-hiding) as Andreas recommended.
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247 window->shaper->userx = 0; |
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248 window->shaper->usery = 0; |
4843
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249 } |
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Fixed formatting of SDL_shape.c post-merge again.
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250 return result; |
4782
b6930aefd008
Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
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diff
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251 } |
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Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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252 |
4843
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253 SDL_bool |
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254 SDL_WindowHasAShape(SDL_Window *window) { |
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255 if (window == NULL || !SDL_IsShapedWindow(window)) |
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256 return SDL_FALSE; |
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Fixed formatting of SDL_shape.c post-merge again.
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257 return window->shaper->hasshape; |
4778
9838d3525a1b
Stubbed out the new get/set parameter functions, added the start of the enum, union, and struct for those parameters themselves, and added doxygen comments throughout the SDL_shape.h header.
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258 } |
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Stubbed out the new get/set parameter functions, added the start of the enum, union, and struct for those parameters themselves, and added doxygen comments throughout the SDL_shape.h header.
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259 |
4843
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Fixed formatting of SDL_shape.c post-merge again.
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260 int |
4847 | 261 SDL_GetShapedWindowMode(SDL_Window *window,SDL_WindowShapeMode *shape_mode) { |
4843
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Fixed formatting of SDL_shape.c post-merge again.
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262 if(window != NULL && SDL_IsShapedWindow(window)) { |
4847 | 263 if(shape_mode == NULL) { |
4843
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Fixed formatting of SDL_shape.c post-merge again.
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|
264 if(SDL_WindowHasAShape(window)) |
0998d1b5dd23
Fixed formatting of SDL_shape.c post-merge again.
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265 //The window given has a shape. |
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Fixed formatting of SDL_shape.c post-merge again.
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266 return 0; |
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267 else |
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Fixed formatting of SDL_shape.c post-merge again.
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268 //The window given is shapeable but lacks a shape. |
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269 return SDL_WINDOW_LACKS_SHAPE; |
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Fixed formatting of SDL_shape.c post-merge again.
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|
270 } |
0998d1b5dd23
Fixed formatting of SDL_shape.c post-merge again.
Eli Gottlieb <eligottlieb@gmail.com>
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|
271 else { |
4847 | 272 *shape_mode = window->shaper->mode; |
4843
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Fixed formatting of SDL_shape.c post-merge again.
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273 return 0; |
0998d1b5dd23
Fixed formatting of SDL_shape.c post-merge again.
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274 } |
0998d1b5dd23
Fixed formatting of SDL_shape.c post-merge again.
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|
275 } |
0998d1b5dd23
Fixed formatting of SDL_shape.c post-merge again.
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276 else |
0998d1b5dd23
Fixed formatting of SDL_shape.c post-merge again.
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|
277 //The window given is not a valid shapeable window. |
0998d1b5dd23
Fixed formatting of SDL_shape.c post-merge again.
Eli Gottlieb <eligottlieb@gmail.com>
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|
278 return SDL_NONSHAPEABLE_WINDOW; |
4778
9838d3525a1b
Stubbed out the new get/set parameter functions, added the start of the enum, union, and struct for those parameters themselves, and added doxygen comments throughout the SDL_shape.h header.
Eli Gottlieb <eligottlieb@gmail.com>
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4776
diff
changeset
|
279 } |