Mercurial > sdl-ios-xcode

annotate src/video/SDL_shape.c @ 4802:f14a8c05f5bb

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Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
author Eli Gottlieb <eligottlieb@gmail.com>
date Sun, 18 Jul 2010 23:05:40 -0400
parents 506a9165491b
children 007567dbb8c1
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
5ff305de5834 Added stub files, working on sample program SDLeyes.
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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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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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24 #include "SDL.h"
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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25 #include "SDL_video.h"
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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26 #include "SDL_sysvideo.h"
4782
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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27 #include "SDL_pixels.h"
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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28 #include "SDL_surface.h"
4765
5ff305de5834 Added stub files, working on sample program SDLeyes.
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29 #include "SDL_shape.h"
4766
7b50faf23907 Moved SDL_shape.h, and building out the API as needed by SDL_Eyes.
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30
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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31 SDL_Window* SDL_CreateShapedWindow(const char *title,unsigned int x,unsigned int y,unsigned int w,unsigned int h,Uint32 flags) {
4782
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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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);
4796
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33 if(result != NULL) {
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34 result->shaper = result->display->device->shape_driver.CreateShaper(result);
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35 if(result->shaper != NULL) {
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36 result->shaper->usershownflag = flags & SDL_WINDOW_SHOWN;
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37 result->shaper->alphacutoff = 1;
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38 result->shaper->hasshape = SDL_FALSE;
e8caf178d082 Added in Visual Studio patch.
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39 return result;
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40 }
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41 else {
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42 SDL_DestroyWindow(result);
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43 return NULL;
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44 }
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45 }
e8caf178d082 Added in Visual Studio patch.
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46 else
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47 return NULL;
4766
7b50faf23907 Moved SDL_shape.h, and building out the API as needed by SDL_Eyes.
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48 }
7b50faf23907 Moved SDL_shape.h, and building out the API as needed by SDL_Eyes.
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49
4781
fc4c775b468a Added Andreas's fixes to the header and stub file for SDL_shape.
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50 SDL_bool SDL_IsShapedWindow(const SDL_Window *window) {
4782
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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51 if(window == NULL)
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52 return SDL_FALSE;
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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53 else
4789
a6bc01875d20 Fixed a pair of syntax errors.
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54 return (SDL_bool)(window->shaper != NULL);
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b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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55 }
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56
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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57 /* REQUIRES that bitmap point to a w-by-h bitmap with 1bpp. */
4785
ef8b32ef9793 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.
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parents: 4782
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58 void SDL_CalculateShapeBitmap(Uint8 alphacutoff,SDL_Surface *shape,Uint8* bitmap,Uint8 ppb,Uint8 value) {
4787
e25ad8d97027 Ported over, to the best of my ability, the code for Win32 shaped windows and patched in the correct C syntax and coding conventions of SDL.
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59 int x = 0;
e25ad8d97027 Ported over, to the best of my ability, the code for Win32 shaped windows and patched in the correct C syntax and coding conventions of SDL.
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60 int y = 0;
4795
6f0bc179771c Numerous bug fixes that keep testeyes from crashing and dying.
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61 Uint8 r = 0,g = 0,b = 0,alpha = 0;
4802
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
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parents: 4801
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62 Uint8* pixel = NULL;
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
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parents: 4801
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63 Uint32 bitmap_pixel,pixel_value = 0;
4782
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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parents: 4781
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64 if(SDL_MUSTLOCK(shape))
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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parents: 4781
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65 SDL_LockSurface(shape);
4799
a0e096916474 Rewrote test program for shaped windows. It definitely displays recognizable pictures now, but the resizing and shaping functionality isn't behaving correctly, possibly due to a miscalculation of alpha values.
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parents: 4796
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66 pixel = (Uint8*)shape->pixels;
a0e096916474 Rewrote test program for shaped windows. It definitely displays recognizable pictures now, but the resizing and shaping functionality isn't behaving correctly, possibly due to a miscalculation of alpha values.
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parents: 4796
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67 for(y = 0;y<shape->h;y++) {
a0e096916474 Rewrote test program for shaped windows. It definitely displays recognizable pictures now, but the resizing and shaping functionality isn't behaving correctly, possibly due to a miscalculation of alpha values.
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parents: 4796
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68 for(x=0;x<shape->w;x++) {
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e25ad8d97027 Ported over, to the best of my ability, the code for Win32 shaped windows and patched in the correct C syntax and coding conventions of SDL.
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parents: 4786
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69 alpha = 0;
4802
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
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parents: 4801
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70 pixel_value = 0;
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
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parents: 4801
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71 pixel = shape->pixels + y * shape->pitch + x * shape->format->BytesPerPixel;
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
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parents: 4801
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72 switch(shape->format->BytesPerPixel) {
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4801
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73 case(1):
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
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parents: 4801
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74 pixel_value = *(Uint8*)pixel;
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
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parents: 4801
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75 break;
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
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parents: 4801
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76 case(2):
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
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parents: 4801
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77 pixel_value = *(Uint16*)pixel;
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
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parents: 4801
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78 break;
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
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parents: 4801
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79 case(4):
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
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parents: 4801
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80 pixel_value = *(Uint32*)pixel;
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
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parents: 4801
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81 break;
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
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parents: 4801
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82 }
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
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parents: 4801
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83 SDL_GetRGBA(pixel_value,shape->format,&r,&g,&b,&alpha);
4796
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84 bitmap_pixel = y*shape->w + x;
4785
ef8b32ef9793 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.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4782
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85 bitmap[bitmap_pixel / ppb] |= (alpha >= alphacutoff ? value : 0) << ((ppb - 1) - (bitmap_pixel % ppb));
4782
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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86 }
4799
a0e096916474 Rewrote test program for shaped windows. It definitely displays recognizable pictures now, but the resizing and shaping functionality isn't behaving correctly, possibly due to a miscalculation of alpha values.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4796
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87 }
4782
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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88 if(SDL_MUSTLOCK(shape))
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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89 SDL_UnlockSurface(shape);
4766
7b50faf23907 Moved SDL_shape.h, and building out the API as needed by SDL_Eyes.
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parents: 4765
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90 }
7b50faf23907 Moved SDL_shape.h, and building out the API as needed by SDL_Eyes.
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91
4781
fc4c775b468a Added Andreas's fixes to the header and stub file for SDL_shape.
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92 int SDL_SetWindowShape(SDL_Window *window,SDL_Surface *shape,SDL_WindowShapeMode *shapeMode) {
4787
e25ad8d97027 Ported over, to the best of my ability, the code for Win32 shaped windows and patched in the correct C syntax and coding conventions of SDL.
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93 int result;
4786
175da36d1342 Fixed up shape files as best I can.
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94 if(window == NULL || !SDL_IsShapedWindow(window))
4782
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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95 //The window given was not a shapeable window.
4801
506a9165491b Added #define's for error codes returned from SDL shaped-window API.
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96 return SDL_NONSHAPEABLE_WINDOW;
4780
4f915a47b995 Replaced the model of treating a window's shape as a render target with treating a window's shape as a surface passed into an SDL_SetWindowShape() function. I'll send this off to Andreas and Sam and start coding.
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parents: 4778
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97 if(shape == NULL)
4782
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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98 //Invalid shape argument.
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506a9165491b Added #define's for error codes returned from SDL shaped-window API.
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99 return SDL_INVALID_SHAPE_ARGUMENT;
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100
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101 if(shapeMode != NULL) {
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102 switch(shapeMode->mode) {
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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103 case ShapeModeDefault: {
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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104 window->shaper->alphacutoff = 1;
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105 break;
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106 }
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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parents: 4781
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107 case ShapeModeBinarizeAlpha: {
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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parents: 4781
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108 window->shaper->alphacutoff = shapeMode->parameters.binarizationCutoff;
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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109 break;
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110 }
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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111 }
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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112 }
4802
f14a8c05f5bb Minor bugfixes. testshape now draws a shaped window with bizarre, pixellated gashes of transparency across it, and in doing so seems to hog a system resource and slow the rest of the video system down.
Eli Gottlieb <eligottlieb@gmail.com>
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113 //TODO: Platform-specific implementations of SetWindowShape. X11 is finished. Win32 is finished. Debugging is in progress on both.
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114 result = window->display->device->shape_driver.SetWindowShape(window->shaper,shape,shapeMode);
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115 window->shaper->hasshape = SDL_TRUE;
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116 if((window->shaper->usershownflag & SDL_WINDOW_SHOWN) == SDL_WINDOW_SHOWN) {
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117 SDL_ShowWindow(window);
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118 window->shaper->usershownflag &= !SDL_WINDOW_SHOWN;
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119 }
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120 return result;
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121 }
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122
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123 SDL_bool SDL_WindowHasAShape(SDL_Window *window) {
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124 if (window == NULL && !SDL_IsShapedWindow(window))
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125 return SDL_FALSE;
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126 return window->shaper->hasshape;
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127 }
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128
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129 int SDL_GetShapedWindowMode(SDL_Window *window,SDL_WindowShapeMode *shapeMode) {
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130 if(window != NULL && SDL_IsShapedWindow(window)) {
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131 if(shapeMode == NULL) {
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132 if(SDL_WindowHasAShape(window))
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133 //The window given has a shape.
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134 return 0;
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135 else
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136 //The window given is shapeable but lacks a shape.
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137 return SDL_WINDOW_LACKS_SHAPE;
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138 }
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139 else {
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140 if(window->shaper->alphacutoff != 1) {
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141 shapeMode->mode = ShapeModeBinarizeAlpha;
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142 shapeMode->parameters.binarizationCutoff = window->shaper->alphacutoff;
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143 }
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144 else
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145 shapeMode->mode = ShapeModeDefault;
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146 return 0;
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147 }
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148 }
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149 else
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150 //The window given is not a valid shapeable window.
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151 return SDL_NONSHAPEABLE_WINDOW;
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152 }