Mercurial > sdl-ios-xcode

annotate src/video/SDL_shape.c @ 4785:ef8b32ef9793

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Updated test code, updated win32 code a bit (still not complete, but hopefully tonight), and removed the last vestiges of ellipse and polygon drawing support.
author Eli Gottlieb <eligottlieb@gmail.com>
date Tue, 06 Jul 2010 22:05:22 -0400
parents b6930aefd008
children 175da36d1342
rev   line source
4765
5ff305de5834 Added stub files, working on sample program SDLeyes.
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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.
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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 */
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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_video.h"
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26 #include "SDL_sysvideo.h"
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27 #include "SDL_pixels.h"
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28 #include "SDL_surface.h"
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29 #include "SDL_shape.h"
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30
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31 SDL_Window* SDL_CreateShapedWindow(const char *title,unsigned int x,unsigned int y,unsigned int w,unsigned int h,Uint32 flags) {
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32 SDL_Window *result = SDL_CreateWindow(title,x,y,w,h,SDL_WINDOW_BORDERLESS | flags & !SDL_WINDOW_FULLSCREEN & !SDL_WINDOW_SHOWN);
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33 result->shaper = result->display->device->shape_driver.CreateShaper(result);
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34 result->shaper->usershownflag = flags & SDL_WINDOW_SHOWN;
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35 result->shaper->alphacutoff = 1;
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36 result->shaper->hasshape = SDL_FALSE;
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37 return result;
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38 }
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39
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40 SDL_bool SDL_IsShapedWindow(const SDL_Window *window) {
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41 if(window == NULL)
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42 return SDL_FALSE;
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43 else
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44 return window->shaper != NULL;
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45 }
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46
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47 /* REQUIRES that bitmap point to a w-by-h bitmap with 1bpp. */
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48 void SDL_CalculateShapeBitmap(Uint8 alphacutoff,SDL_Surface *shape,Uint8* bitmap,Uint8 ppb,Uint8 value) {
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49 if(SDL_MUSTLOCK(shape))
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50 SDL_LockSurface(shape);
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51 int x = 0,y = 0;
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52 for(x = 0;x<shape->w;x++)
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53 for(y = 0;y<shape->h;y++) {
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54 void* pixel = shape->pixels + (y*shape->pitch) + (x*shape->format->BytesPerPixel);
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55 Uint8 alpha = 0;
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56 SDL_GetRGBA(*(Uint32*)pixel,shape->format,NULL,NULL,NULL,&alpha);
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57 Uint32 bitmap_pixel = y*shape->w + x;
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58 bitmap[bitmap_pixel / ppb] |= (alpha >= alphacutoff ? value : 0) << ((ppb - 1) - (bitmap_pixel % ppb));
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59 }
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60 if(SDL_MUSTLOCK(shape))
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61 SDL_UnlockSurface(shape);
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62 }
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63
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64 int SDL_SetWindowShape(SDL_Window *window,SDL_Surface *shape,SDL_WindowShapeMode *shapeMode) {
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65 if(window == NULL || !SDL_WindowIsShaped(window))
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66 //The window given was not a shapeable window.
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67 return -2;
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68 if(shape == NULL)
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69 //Invalid shape argument.
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70 return -1;
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71
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72 if(shapeMode != NULL) {
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73 switch(shapeMode->mode) {
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74 case ShapeModeDefault: {
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75 window->shaper->alphacutoff = 1;
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76 break;
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77 }
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78 case ShapeModeBinarizeAlpha: {
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79 window->shaper->alphacutoff = shapeMode->parameters.binarizationCutoff;
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80 break;
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81 }
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82 }
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83 }
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84 //TODO: Platform-specific implementations of SetWindowShape. X11 is finished. Win32 is in progress.
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85 int result = window->display->device->shape_driver.SetWindowShape(window->shaper,shape,shapeMode);
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86 window->shaper->hasshape = SDL_TRUE;
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87 if(window->shaper->usershownflag & SDL_WINDOW_SHOWN == SDL_WINDOW_SHOWN) {
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88 SDL_ShowWindow(window);
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89 window->shaper->usershownflag &= !SDL_WINDOW_SHOWN;
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90 }
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91 return result;
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92 }
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93
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94 SDL_bool SDL_WindowHasAShape(SDL_Window *window) {
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95 assert(window != NULL && SDL_IsShapedWindow(window));
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96 return window->shaper->hasshape;
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97 }
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98
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99 int SDL_GetShapedWindowMode(SDL_Window *window,SDL_WindowShapeMode *shapeMode) {
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100 if(window != NULL && SDL_IsShapedWindow(window)) {
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101 if(shapeMode == NULL) {
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102 if(SDL_WindowHasAShape(window))
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103 //The window given has a shape.
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104 return 0;
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105 else
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106 //The window given is shapeable but lacks a shape.
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107 return -2;
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108 }
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109 else {
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110 if(window->shaper->alphacutoff != 1) {
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111 shapeMode->mode = ShapeModeBinarizeAlpha;
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112 shapeMode->parameters.binarizationCutoff = window->shaper->alphacutoff;
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113 }
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114 else
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115 shapeMode->mode = ShapeModeDefault;
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116 return 0;
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
diff changeset
117 }
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
diff changeset
118 }
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
diff changeset
119 else
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
diff changeset
120 //The window given is not a valid shapeable 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
121 return -1;
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
122 }