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annotate src/video/SDL_shape.c @ 4953:4f40b11e1045

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Fixed prototype for SDL_main() FIXME: Still need to pass some arguments - can we get them from the Java class?
author Sam Lantinga <slouken@libsdl.org>
date Tue, 04 Jan 2011 11:39:52 -0800
parents b67815cf9f25
children 58265e606e4e
rev   line source
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5ff305de5834 Added stub files, working on sample program SDLeyes.
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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
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.
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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.
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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.
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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
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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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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"
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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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35 SDL_Window *result = NULL;
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8f1994e8d886 Create all shaped windows at -1000,-1000 and save the real coordinates.
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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++) {
4843
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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):
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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136 pixel_value = *(Uint8*)pixel;
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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137 break;
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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138 case(2):
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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139 pixel_value = *(Uint16*)pixel;
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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140 break;
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141 case(3):
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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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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diff changeset
173 next.y = dimensions.y;
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diff changeset
174 result->data.children.upleft = (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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175 next.x += next.w;
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176 //Unneeded: next.y = dimensions.y;
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diff changeset
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 }
4843
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188 //If we never recursed, all the pixels in this quadrant have the same "value".
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diff changeset
189 result->kind = (last_opaque == SDL_TRUE ? OpaqueShape : TransparentShape);
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diff changeset
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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diff changeset
195 SDL_CalculateShapeTree(SDL_WindowShapeMode mode,SDL_Surface* shape) {
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diff changeset
196 SDL_Rect dimensions = {0,0,shape->w,shape->h};
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diff changeset
197 SDL_ShapeTree* result = NULL;
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diff changeset
198 if(SDL_MUSTLOCK(shape))
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
199 SDL_LockSurface(shape);
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diff changeset
200 result = RecursivelyCalculateShapeTree(mode,shape,dimensions);
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diff changeset
201 if(SDL_MUSTLOCK(shape))
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
202 SDL_UnlockSurface(shape);
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diff changeset
203 return result;
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204 }
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diff changeset
205
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diff changeset
206 void
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diff changeset
207 SDL_TraverseShapeTree(SDL_ShapeTree *tree,SDL_TraversalFunction function,void* closure) {
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diff changeset
208 SDL_assert(tree != NULL);
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
209 if(tree->kind == QuadShape) {
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
210 SDL_TraverseShapeTree((SDL_ShapeTree *)tree->data.children.upleft,function,closure);
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
211 SDL_TraverseShapeTree((SDL_ShapeTree *)tree->data.children.upright,function,closure);
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diff changeset
212 SDL_TraverseShapeTree((SDL_ShapeTree *)tree->data.children.downleft,function,closure);
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diff changeset
213 SDL_TraverseShapeTree((SDL_ShapeTree *)tree->data.children.downright,function,closure);
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
214 }
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
215 else
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
216 function(tree,closure);
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217 }
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
218
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diff changeset
219 void
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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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diff changeset
220 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().
egottlieb
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diff changeset
221 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().
egottlieb
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diff changeset
222 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().
egottlieb
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diff changeset
223 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
224 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().
egottlieb
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diff changeset
225 SDL_FreeShapeTree((SDL_ShapeTree **)&(*shape_tree)->data.children.downright);
4843
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diff changeset
226 }
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().
egottlieb
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diff changeset
227 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
228 *shape_tree = NULL;
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229 }
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diff changeset
230
4843
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diff changeset
231 int
4847
4201864f77e7 Fixing variable naming style.
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diff changeset
232 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
233 int result;
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
234 if(window == NULL || !SDL_IsShapedWindow(window))
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
235 //The window given was not a shapeable window.
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diff changeset
236 return SDL_NONSHAPEABLE_WINDOW;
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diff changeset
237 if(shape == NULL)
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
238 //Invalid shape argument.
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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diff changeset
239 return SDL_INVALID_SHAPE_ARGUMENT;
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diff changeset
240
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diff changeset
241 if(shape_mode != NULL)
4201864f77e7 Fixing variable naming style.
egottlieb
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diff changeset
242 window->shaper->mode = *shape_mode;
4201864f77e7 Fixing variable naming style.
egottlieb
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diff changeset
243 result = window->display->device->shape_driver.SetWindowShape(window->shaper,shape,shape_mode);
4843
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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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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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parents: 4850
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246 SDL_SetWindowPosition(window,window->shaper->userx,window->shaper->usery);
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247 window->shaper->userx = 0;
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248 window->shaper->usery = 0;
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249 }
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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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251 }
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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parents: 4781
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252
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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))
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
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256 return SDL_FALSE;
0998d1b5dd23 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.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4776
diff changeset
258 }
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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parents: 4776
diff changeset
259
4843
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parents: 4841
diff changeset
260 int
4847
4201864f77e7 Fixing variable naming style.
egottlieb
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diff changeset
261 SDL_GetShapedWindowMode(SDL_Window *window,SDL_WindowShapeMode *shape_mode) {
4843
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parents: 4841
diff changeset
262 if(window != NULL && SDL_IsShapedWindow(window)) {
4847
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egottlieb
parents: 4846
diff changeset
263 if(shape_mode == NULL) {
4843
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parents: 4841
diff changeset
264 if(SDL_WindowHasAShape(window))
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
diff changeset
265 //The window given has a shape.
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
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266 return 0;
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
diff changeset
267 else
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
diff changeset
268 //The window given is shapeable but lacks a shape.
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diff changeset
269 return SDL_WINDOW_LACKS_SHAPE;
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diff changeset
270 }
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
diff changeset
271 else {
4847
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diff changeset
272 *shape_mode = window->shaper->mode;
4843
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diff changeset
273 return 0;
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
diff changeset
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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parents: 4841
diff changeset
276 else
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
diff changeset
277 //The window given is not a valid shapeable window.
0998d1b5dd23 Fixed formatting of SDL_shape.c post-merge again.
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parents: 4841
diff changeset
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>
parents: 4776
diff changeset
279 }