Mercurial > sdl-ios-xcode

annotate src/video/x11/SDL_x11shape.c @ 5004:0c72ae7b7cb2

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Added native atomic operations for Windows, Mac OS X, and gcc compiler intrinsics. Changed the CAS return value to bool, so it's efficient with OSAtomicCompareAndSwap32Barrier() Added an atomic test adapted from code by Michael Davidsaver
author Sam Lantinga <slouken@libsdl.org>
date Sun, 16 Jan 2011 15:16:39 -0800
parents 5624fb0190b5
children
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
6e03d73054d7 Fixed names of driver-specific implementation files.
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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
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23 #include "SDL_assert.h"
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24 #include "SDL_x11video.h"
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25 #include "SDL_x11shape.h"
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26 #include "SDL_x11window.h"
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27
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28 SDL_Window*
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29 X11_CreateShapedWindow(const char *title,unsigned int x,unsigned int y,unsigned int w,unsigned int h,Uint32 flags) {
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30 return SDL_CreateWindow(title,x,y,w,h,flags);
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31 }
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32
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33 SDL_WindowShaper*
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34 X11_CreateShaper(SDL_Window* window) {
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35 SDL_WindowShaper* result = NULL;
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36
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37 #if SDL_VIDEO_DRIVER_X11_XSHAPE
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38 if (SDL_X11_HAVE_XSHAPE) { /* Make sure X server supports it. */
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39 result = malloc(sizeof(SDL_WindowShaper));
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40 result->window = window;
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41 result->mode.mode = ShapeModeDefault;
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42 result->mode.parameters.binarizationCutoff = 1;
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43 result->userx = result->usery = 0;
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44 SDL_ShapeData* data = SDL_malloc(sizeof(SDL_ShapeData));
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45 result->driverdata = data;
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46 data->bitmapsize = 0;
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47 data->bitmap = NULL;
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48 window->shaper = result;
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49 int resized_properly = X11_ResizeWindowShape(window);
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50 SDL_assert(resized_properly == 0);
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51 }
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52 #endif
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53
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54 return result;
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55 }
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56
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57 int
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58 X11_ResizeWindowShape(SDL_Window* window) {
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59 SDL_ShapeData* data = window->shaper->driverdata;
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60 SDL_assert(data != NULL);
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61
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62 unsigned int bitmapsize = window->w / 8;
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63 if(window->w % 8 > 0)
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64 bitmapsize += 1;
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65 bitmapsize *= window->h;
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66 if(data->bitmapsize != bitmapsize || data->bitmap == NULL) {
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67 data->bitmapsize = bitmapsize;
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68 if(data->bitmap != NULL)
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69 free(data->bitmap);
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70 data->bitmap = malloc(data->bitmapsize);
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71 if(data->bitmap == NULL) {
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72 SDL_SetError("Could not allocate memory for shaped-window bitmap.");
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73 return -1;
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74 }
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75 }
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76 memset(data->bitmap,0,data->bitmapsize);
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77
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78 window->shaper->userx = window->x;
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79 window->shaper->usery = window->y;
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80 SDL_SetWindowPosition(window,-1000,-1000);
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81
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82 return 0;
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83 }
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84
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85 int
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86 X11_SetWindowShape(SDL_WindowShaper *shaper,SDL_Surface *shape,SDL_WindowShapeMode *shape_mode) {
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87 if(shaper == NULL || shape == NULL || shaper->driverdata == NULL)
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88 return -1;
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89
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90 #if SDL_VIDEO_DRIVER_X11_XSHAPE
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91 if(shape->format->Amask == 0 && SDL_SHAPEMODEALPHA(shape_mode->mode))
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92 return -2;
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93 if(shape->w != shaper->window->w || shape->h != shaper->window->h)
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94 return -3;
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95 SDL_ShapeData *data = shaper->driverdata;
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97 /* Assume that shaper->alphacutoff already has a value, because SDL_SetWindowShape() should have given it one. */
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98 SDL_CalculateShapeBitmap(shaper->mode,shape,data->bitmap,8);
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99
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100 SDL_WindowData *windowdata = (SDL_WindowData*)(shaper->window->driverdata);
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101 Pixmap shapemask = XCreateBitmapFromData(windowdata->videodata->display,windowdata->xwindow,data->bitmap,shaper->window->w,shaper->window->h);
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102
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103 XShapeCombineMask(windowdata->videodata->display,windowdata->xwindow, ShapeBounding, 0, 0,shapemask, ShapeSet);
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104 XSync(windowdata->videodata->display,False);
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105
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106 XFreePixmap(windowdata->videodata->display,shapemask);
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107 #endif
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108
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109 return 0;
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110 }