Mercurial > sdl-ios-xcode

annotate src/video/win32/SDL_win32shape.c @ 4838:1f9915666afd

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Reformatting code to match the rest of SDL. Variable names seem OK; replaced tabs with 4 spaces each for indentation.
author Eli Gottlieb <eligottlieb@gmail.com>
date Mon, 09 Aug 2010 15:37:20 -0400
parents 55f32099a4b5
children 05d172e92b52
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
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23 #include "SDL_win32shape.h"
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24 #include "SDL_win32video.h"
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25
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26 SDL_WindowShaper*
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27 Win32_CreateShaper(SDL_Window * window) {
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28 int resized_properly;
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29 SDL_WindowShaper* result = (SDL_WindowShaper *)SDL_malloc(sizeof(SDL_WindowShaper));
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30 result->window = window;
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31 result->mode.mode = ShapeModeDefault;
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32 result->mode.parameters.binarizationCutoff = 1;
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33 result->usershownflag = 0;
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34 result->driverdata = (SDL_ShapeData*)SDL_malloc(sizeof(SDL_ShapeData));
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35 ((SDL_ShapeData*)result->driverdata)->mask_tree = NULL;
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36 //Put some driver-data here.
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37 window->shaper = result;
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38 resized_properly = Win32_ResizeWindowShape(window);
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39 if (resized_properly != 0)
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40 return NULL;
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41
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42 return result;
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43 }
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44
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45 void
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46 CombineRectRegions(SDL_ShapeTree* node, void* closure) {
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47 HRGN* mask_region = (HRGN *)closure;
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48 if(node->kind == OpaqueShape) {
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49 HRGN temp_region = CreateRectRgn(node->data.shape.x,node->data.shape.y,node->data.shape.w,node->data.shape.h);
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50 CombineRgn(*mask_region,*mask_region,temp_region, RGN_OR);
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51 DeleteObject(temp_region);
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52 }
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53 }
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54
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55 int
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56 Win32_SetWindowShape(SDL_WindowShaper *shaper,SDL_Surface *shape,SDL_WindowShapeMode *shapeMode) {
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57 SDL_ShapeData *data;
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58 HRGN mask_region;
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59 SDL_WindowData *windowdata;
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60 HWND hwnd;
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61
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62 if (shaper == NULL || shape == NULL)
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63 return SDL_INVALID_SHAPE_ARGUMENT;
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64 if(shape->format->Amask == 0 && shapeMode->mode != ShapeModeColorKey || shape->w != shaper->window->w || shape->h != shaper->window->h)
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65 return SDL_INVALID_SHAPE_ARGUMENT;
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66
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67 data = (SDL_ShapeData*)shaper->driverdata;
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68 if(data->mask_tree != NULL)
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69 SDL_FreeShapeTree(&data->mask_tree);
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70 data->mask_tree = SDL_CalculateShapeTree(*shapeMode,shape,SDL_FALSE);
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71
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72 /*
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73 * Start with empty region
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74 */
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75 mask_region = CreateRectRgn(0, 0, 0, 0);
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76
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77 SDL_TraverseShapeTree(data->mask_tree,&CombineRectRegions,&mask_region);
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78
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79 /*
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80 * Set the new region mask for the window
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81 */
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82 windowdata=(SDL_WindowData *)(shaper->window->driverdata);
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83 hwnd = windowdata->hwnd;
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84 SetWindowRgn(hwnd, mask_region, TRUE);
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85
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86 return 0;
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87 }
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88
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89 int
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90 Win32_ResizeWindowShape(SDL_Window *window) {
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91 SDL_ShapeData* data;
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93 if (window == NULL)
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94 return -1;
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95 data = (SDL_ShapeData *)window->shaper->driverdata;
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96 if (data == NULL)
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97 return -1;
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98
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99 if(data->mask_tree != NULL)
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100 SDL_FreeShapeTree(&data->mask_tree);
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101
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102 window->shaper->usershownflag |= window->flags & SDL_WINDOW_SHOWN;
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103
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104 return 0;
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105 }