Mercurial > sdl-ios-xcode

annotate src/video/SDL_shape.c @ 4852:c19c729eb201

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Added hiding-as-positioning trick and finally fixed flags.
author egottlieb
date Sun, 15 Aug 2010 21:46:04 -0400
parents 5624fb0190b5
children 6d4d6605a0d3
rev   line source
4765
5ff305de5834 Added stub files, working on sample program SDLeyes.
Eli Gottlieb <eligottlieb@gmail.com>
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1 /*
5ff305de5834 Added stub files, working on sample program SDLeyes.
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2 SDL - Simple DirectMedia Layer
5ff305de5834 Added stub files, working on sample program SDLeyes.
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3 Copyright (C) 2010 Eli Gottlieb
5ff305de5834 Added stub files, working on sample program SDLeyes.
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4
5ff305de5834 Added stub files, working on sample program SDLeyes.
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5 This library is free software; you can redistribute it and/or
5ff305de5834 Added stub files, working on sample program SDLeyes.
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6 modify it under the terms of the GNU Lesser General Public
5ff305de5834 Added stub files, working on sample program SDLeyes.
Eli Gottlieb <eligottlieb@gmail.com>
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7 License as published by the Free Software Foundation; either
5ff305de5834 Added stub files, working on sample program SDLeyes.
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8 version 2.1 of the License, or (at your option) any later version.
5ff305de5834 Added stub files, working on sample program SDLeyes.
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9
5ff305de5834 Added stub files, working on sample program SDLeyes.
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10 This library is distributed in the hope that it will be useful,
5ff305de5834 Added stub files, working on sample program SDLeyes.
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
5ff305de5834 Added stub files, working on sample program SDLeyes.
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
5ff305de5834 Added stub files, working on sample program SDLeyes.
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13 Lesser General Public License for more details.
5ff305de5834 Added stub files, working on sample program SDLeyes.
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14
5ff305de5834 Added stub files, working on sample program SDLeyes.
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15 You should have received a copy of the GNU Lesser General Public
5ff305de5834 Added stub files, working on sample program SDLeyes.
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16 License along with this library; if not, write to the Free Software
5ff305de5834 Added stub files, working on sample program SDLeyes.
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
5ff305de5834 Added stub files, working on sample program SDLeyes.
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18
5ff305de5834 Added stub files, working on sample program SDLeyes.
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19 Eli Gottlieb
5ff305de5834 Added stub files, working on sample program SDLeyes.
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20 eligottlieb@gmail.com
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21 */
4769
83f9b95da263 Added the standard headers and footers that make SDL_shape.h and SDL_shape.c integrate properly into the build.
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22 #include "SDL_config.h"
4776
29dcad9c58b3 Removed and added back SDL_shape.{c,h} wholesale. Will this get them tracked properly?
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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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c19c729eb201 Added hiding-as-positioning trick and finally fixed flags.
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35 SDL_Window *result = SDL_CreateWindow(title,x,y,w,h,flags | SDL_WINDOW_BORDERLESS & ~SDL_WINDOW_FULLSCREEN & ~SDL_WINDOW_RESIZABLE);
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36 if(result != NULL) {
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37 result->shaper = result->display->device->shape_driver.CreateShaper(result);
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38 if(result->shaper != NULL) {
4851
5624fb0190b5 Changed flags and positioning (for the fake-hiding) as Andreas recommended.
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39 result->shaper->userx = x;
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40 result->shaper->usery = y;
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41 result->shaper->mode.mode = ShapeModeDefault;
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42 result->shaper->mode.parameters.binarizationCutoff = 1;
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43 result->shaper->hasshape = SDL_FALSE;
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44 return result;
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45 }
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46 else {
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47 SDL_DestroyWindow(result);
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48 return NULL;
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49 }
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50 }
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51 else
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52 return NULL;
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53 }
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54
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55 SDL_bool
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56 SDL_IsShapedWindow(const SDL_Window *window) {
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57 if(window == NULL)
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58 return SDL_FALSE;
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59 else
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60 return (SDL_bool)(window->shaper != NULL);
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61 }
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62
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5b4c7d7d8953 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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63 /* REQUIRES that bitmap point to a w-by-h bitmap with ppb pixels-per-byte. */
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64 void
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65 SDL_CalculateShapeBitmap(SDL_WindowShapeMode mode,SDL_Surface *shape,Uint8* bitmap,Uint8 ppb) {
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66 int x = 0;
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67 int y = 0;
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68 Uint8 r = 0,g = 0,b = 0,alpha = 0;
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69 Uint8* pixel = NULL;
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70 Uint32 bitmap_pixel,pixel_value = 0,mask_value = 0;
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71 SDL_Color key;
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72 if(SDL_MUSTLOCK(shape))
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73 SDL_LockSurface(shape);
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74 pixel = (Uint8*)shape->pixels;
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75 for(y = 0;y<shape->h;y++) {
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76 for(x=0;x<shape->w;x++) {
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77 alpha = 0;
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78 pixel_value = 0;
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79 pixel = (Uint8 *)(shape->pixels) + (y*shape->pitch) + (x*shape->format->BytesPerPixel);
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80 switch(shape->format->BytesPerPixel) {
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81 case(1):
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82 pixel_value = *(Uint8*)pixel;
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83 break;
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84 case(2):
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85 pixel_value = *(Uint16*)pixel;
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86 break;
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87 case(3):
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88 pixel_value = *(Uint32*)pixel & (~shape->format->Amask);
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89 break;
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90 case(4):
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91 pixel_value = *(Uint32*)pixel;
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92 break;
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93 }
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94 SDL_GetRGBA(pixel_value,shape->format,&r,&g,&b,&alpha);
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95 bitmap_pixel = y*shape->w + x;
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96 switch(mode.mode) {
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97 case(ShapeModeDefault):
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98 mask_value = (alpha >= 1 ? 1 : 0);
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99 break;
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100 case(ShapeModeBinarizeAlpha):
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101 mask_value = (alpha >= mode.parameters.binarizationCutoff ? 1 : 0);
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102 break;
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103 case(ShapeModeReverseBinarizeAlpha):
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104 mask_value = (alpha <= mode.parameters.binarizationCutoff ? 1 : 0);
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105 break;
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106 case(ShapeModeColorKey):
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107 key = mode.parameters.colorKey;
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108 mask_value = ((key.r != r || key.g != g || key.b != b) ? 1 : 0);
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109 break;
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110 }
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111 bitmap[bitmap_pixel / ppb] |= mask_value << (7 - ((ppb - 1) - (bitmap_pixel % ppb)));
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112 }
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113 }
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114 if(SDL_MUSTLOCK(shape))
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115 SDL_UnlockSurface(shape);
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116 }
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117
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118 SDL_ShapeTree*
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119 RecursivelyCalculateShapeTree(SDL_WindowShapeMode mode,SDL_Surface* mask,SDL_Rect dimensions) {
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120 int x = 0,y = 0;
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121 Uint8* pixel = NULL;
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122 Uint32 pixel_value = 0;
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123 Uint8 r = 0,g = 0,b = 0,a = 0;
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124 SDL_bool pixel_opaque = SDL_FALSE;
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125 int last_opaque = -1;
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126 SDL_Color key;
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127 SDL_ShapeTree* result = (SDL_ShapeTree*)SDL_malloc(sizeof(SDL_ShapeTree));
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128 SDL_Rect next = {0,0,0,0};
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129 for(y=dimensions.y;y<dimensions.y + dimensions.h;y++) {
4843
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130 for(x=dimensions.x;x<dimensions.x + dimensions.w;x++) {
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131 pixel_value = 0;
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132 pixel = (Uint8 *)(mask->pixels) + (y*mask->pitch) + (x*mask->format->BytesPerPixel);
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133 switch(mask->format->BytesPerPixel) {
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134 case(1):
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135 pixel_value = *(Uint8*)pixel;
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136 break;
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137 case(2):
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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138 pixel_value = *(Uint16*)pixel;
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139 break;
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140 case(3):
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141 pixel_value = *(Uint32*)pixel & (~mask->format->Amask);
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142 break;
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143 case(4):
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144 pixel_value = *(Uint32*)pixel;
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145 break;
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146 }
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147 SDL_GetRGBA(pixel_value,mask->format,&r,&g,&b,&a);
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148 switch(mode.mode) {
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149 case(ShapeModeDefault):
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150 pixel_opaque = (a >= 1 ? SDL_TRUE : SDL_FALSE);
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151 break;
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152 case(ShapeModeBinarizeAlpha):
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153 pixel_opaque = (a >= mode.parameters.binarizationCutoff ? SDL_TRUE : SDL_FALSE);
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154 break;
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155 case(ShapeModeReverseBinarizeAlpha):
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156 pixel_opaque = (a <= mode.parameters.binarizationCutoff ? SDL_TRUE : SDL_FALSE);
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157 break;
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158 case(ShapeModeColorKey):
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159 key = mode.parameters.colorKey;
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160 pixel_opaque = ((key.r != r || key.g != g || key.b != b) ? SDL_TRUE : SDL_FALSE);
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161 break;
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162 }
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163 if(last_opaque == -1)
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164 last_opaque = pixel_opaque;
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165 if(last_opaque != pixel_opaque) {
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166 result->kind = QuadShape;
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167 //These will stay the same.
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168 next.w = dimensions.w / 2;
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169 next.h = dimensions.h / 2;
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170 //These will change from recursion to recursion.
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171 next.x = dimensions.x;
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172 next.y = dimensions.y;
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173 result->data.children.upleft = (struct SDL_ShapeTree *)RecursivelyCalculateShapeTree(mode,mask,next);
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174 next.x += next.w;
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0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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175 //Unneeded: next.y = dimensions.y;
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176 result->data.children.upright = (struct SDL_ShapeTree *)RecursivelyCalculateShapeTree(mode,mask,next);
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177 next.x = dimensions.x;
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14870d46ee2d 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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178 next.y += next.h;
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179 result->data.children.downleft = (struct SDL_ShapeTree *)RecursivelyCalculateShapeTree(mode,mask,next);
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14870d46ee2d 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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180 next.x += next.w;
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181 //Unneeded: next.y = dimensions.y + dimensions.h /2;
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182 result->data.children.downright = (struct SDL_ShapeTree *)RecursivelyCalculateShapeTree(mode,mask,next);
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183 return result;
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184 }
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185 }
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186 }
4843
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187 //If we never recursed, all the pixels in this quadrant have the same "value".
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188 result->kind = (last_opaque == SDL_TRUE ? OpaqueShape : TransparentShape);
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189 result->data.shape = dimensions;
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190 return result;
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191 }
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192
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193 SDL_ShapeTree*
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194 SDL_CalculateShapeTree(SDL_WindowShapeMode mode,SDL_Surface* shape) {
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195 SDL_Rect dimensions = {0,0,shape->w,shape->h};
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196 SDL_ShapeTree* result = NULL;
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diff changeset
197 if(SDL_MUSTLOCK(shape))
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diff changeset
198 SDL_LockSurface(shape);
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diff changeset
199 result = RecursivelyCalculateShapeTree(mode,shape,dimensions);
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diff changeset
200 if(SDL_MUSTLOCK(shape))
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
201 SDL_UnlockSurface(shape);
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diff changeset
202 return result;
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203 }
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204
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diff changeset
205 void
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diff changeset
206 SDL_TraverseShapeTree(SDL_ShapeTree *tree,SDL_TraversalFunction function,void* closure) {
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diff changeset
207 SDL_assert(tree != NULL);
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
208 if(tree->kind == QuadShape) {
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
209 SDL_TraverseShapeTree((SDL_ShapeTree *)tree->data.children.upleft,function,closure);
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diff changeset
210 SDL_TraverseShapeTree((SDL_ShapeTree *)tree->data.children.upright,function,closure);
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diff changeset
211 SDL_TraverseShapeTree((SDL_ShapeTree *)tree->data.children.downleft,function,closure);
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diff changeset
212 SDL_TraverseShapeTree((SDL_ShapeTree *)tree->data.children.downright,function,closure);
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diff changeset
213 }
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
214 else
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diff changeset
215 function(tree,closure);
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216 }
5b4c7d7d8953 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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diff changeset
217
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diff changeset
218 void
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219 SDL_FreeShapeTree(SDL_ShapeTree** shape_tree) {
14870d46ee2d 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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diff changeset
220 if((*shape_tree)->kind == QuadShape) {
14870d46ee2d 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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diff changeset
221 SDL_FreeShapeTree((SDL_ShapeTree **)&(*shape_tree)->data.children.upleft);
14870d46ee2d 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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diff changeset
222 SDL_FreeShapeTree((SDL_ShapeTree **)&(*shape_tree)->data.children.upright);
14870d46ee2d 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().
egottlieb
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diff changeset
223 SDL_FreeShapeTree((SDL_ShapeTree **)&(*shape_tree)->data.children.downleft);
14870d46ee2d 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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diff changeset
224 SDL_FreeShapeTree((SDL_ShapeTree **)&(*shape_tree)->data.children.downright);
4843
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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225 }
4850
14870d46ee2d 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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diff changeset
226 SDL_free(*shape_tree);
14870d46ee2d 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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diff changeset
227 *shape_tree = NULL;
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228 }
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229
4843
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diff changeset
230 int
4849
0b918c186938 Finally got the Win32 API code for shaping to work! Just need to fix SDL_CalculateShapeTree() now!
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diff changeset
231 SDL_SetWindowShape(SDL_Window *window,SDL_Surface *shape,SDL_WindowShapeMode *shape_mode) {
4843
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
232 int result;
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
233 if(window == NULL || !SDL_IsShapedWindow(window))
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
234 //The window given was not a shapeable window.
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diff changeset
235 return SDL_NONSHAPEABLE_WINDOW;
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diff changeset
236 if(shape == NULL)
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diff changeset
237 //Invalid shape argument.
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diff changeset
238 return SDL_INVALID_SHAPE_ARGUMENT;
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diff changeset
239
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0b918c186938 Finally got the Win32 API code for shaping to work! Just need to fix SDL_CalculateShapeTree() now!
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diff changeset
240 if(shape_mode != NULL)
0b918c186938 Finally got the Win32 API code for shaping to work! Just need to fix SDL_CalculateShapeTree() now!
egottlieb
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diff changeset
241 window->shaper->mode = *shape_mode;
0b918c186938 Finally got the Win32 API code for shaping to work! Just need to fix SDL_CalculateShapeTree() now!
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diff changeset
242 result = window->display->device->shape_driver.SetWindowShape(window->shaper,shape,shape_mode);
4843
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diff changeset
243 window->shaper->hasshape = SDL_TRUE;
4852
c19c729eb201 Added hiding-as-positioning trick and finally fixed flags.
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diff changeset
244 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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parents: 4850
diff changeset
245 SDL_SetWindowPosition(window,window->shaper->userx,window->shaper->usery);
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parents: 4850
diff changeset
246 window->shaper->userx = 0;
5624fb0190b5 Changed flags and positioning (for the fake-hiding) as Andreas recommended.
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parents: 4850
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247 window->shaper->usery = 0;
4843
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
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248 }
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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249 return result;
4782
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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parents: 4781
diff changeset
250 }
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
diff changeset
251
4843
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
diff changeset
252 SDL_bool
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
diff changeset
253 SDL_WindowHasAShape(SDL_Window *window) {
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
diff changeset
254 if (window == NULL || !SDL_IsShapedWindow(window))
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
diff changeset
255 return SDL_FALSE;
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
diff changeset
256 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.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4776
diff changeset
257 }
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>
parents: 4776
diff changeset
258
4843
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4841
diff changeset
259 int
4849
0b918c186938 Finally got the Win32 API code for shaping to work! Just need to fix SDL_CalculateShapeTree() now!
egottlieb
parents: 4848
diff changeset
260 SDL_GetShapedWindowMode(SDL_Window *window,SDL_WindowShapeMode *shape_mode) {
4843
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4841
diff changeset
261 if(window != NULL && SDL_IsShapedWindow(window)) {
4849
0b918c186938 Finally got the Win32 API code for shaping to work! Just need to fix SDL_CalculateShapeTree() now!
egottlieb
parents: 4848
diff changeset
262 if(shape_mode == NULL) {
4843
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
diff changeset
263 if(SDL_WindowHasAShape(window))
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4841
diff changeset
264 //The window given has a shape.
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4841
diff changeset
265 return 0;
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4841
diff changeset
266 else
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
diff changeset
267 //The window given is shapeable but lacks a shape.
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
diff changeset
268 return SDL_WINDOW_LACKS_SHAPE;
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
diff changeset
269 }
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4841
diff changeset
270 else {
4849
0b918c186938 Finally got the Win32 API code for shaping to work! Just need to fix SDL_CalculateShapeTree() now!
egottlieb
parents: 4848
diff changeset
271 *shape_mode = window->shaper->mode;
4843
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4841
diff changeset
272 return 0;
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4841
diff changeset
273 }
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4841
diff changeset
274 }
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4841
diff changeset
275 else
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4841
diff changeset
276 //The window given is not a valid shapeable window.
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4841
diff changeset
277 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>
parents: 4776
diff changeset
278 }