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annotate src/video/SDL_shape.c @ 4787:e25ad8d97027

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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.
author Eli Gottlieb <eligottlieb@gmail.com>
date Thu, 08 Jul 2010 22:52:49 -0400
parents 175da36d1342
children a6bc01875d20
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.
Eli Gottlieb <eligottlieb@gmail.com>
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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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parents:
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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.
Eli Gottlieb <eligottlieb@gmail.com>
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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.
Eli Gottlieb <eligottlieb@gmail.com>
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
5ff305de5834 Added stub files, working on sample program SDLeyes.
Eli Gottlieb <eligottlieb@gmail.com>
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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.
Eli Gottlieb <eligottlieb@gmail.com>
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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"
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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"
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29 #include "SDL_shape.h"
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7b50faf23907 Moved SDL_shape.h, and building out the API as needed by SDL_Eyes.
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30
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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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parents: 4766
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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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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);
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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parents: 4781
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33 result->shaper = result->display->device->shape_driver.CreateShaper(result);
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parents: 4781
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34 result->shaper->usershownflag = flags & SDL_WINDOW_SHOWN;
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parents: 4781
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35 result->shaper->alphacutoff = 1;
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parents: 4781
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36 result->shaper->hasshape = SDL_FALSE;
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parents: 4781
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37 return result;
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7b50faf23907 Moved SDL_shape.h, and building out the API as needed by SDL_Eyes.
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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;
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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43 else
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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parents: 4786
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44 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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45 }
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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46
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
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47 /* 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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48 void SDL_CalculateShapeBitmap(Uint8 alphacutoff,SDL_Surface *shape,Uint8* bitmap,Uint8 ppb,Uint8 value) {
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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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49 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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50 int y = 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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parents: 4786
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51 Uint8 alpha = 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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parents: 4786
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52 Uint8* pixel;
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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53 Uint32 bitmap_pixel;
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54 if(SDL_MUSTLOCK(shape))
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55 SDL_LockSurface(shape);
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56 for(x = 0;x<shape->w;x++)
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57 for(y = 0;y<shape->h;y++) {
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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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58 pixel = shape->pixels + (y*shape->pitch) + (x*shape->format->BytesPerPixel);
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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59 alpha = 0;
4782
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60 SDL_GetRGBA(*(Uint32*)pixel,shape->format,NULL,NULL,NULL,&alpha);
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61 Uint32 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.
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parents: 4782
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62 bitmap[bitmap_pixel / ppb] |= (alpha >= alphacutoff ? value : 0) << ((ppb - 1) - (bitmap_pixel % ppb));
4782
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63 }
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64 if(SDL_MUSTLOCK(shape))
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65 SDL_UnlockSurface(shape);
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66 }
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67
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68 int SDL_SetWindowShape(SDL_Window *window,SDL_Surface *shape,SDL_WindowShapeMode *shapeMode) {
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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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69 int result;
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175da36d1342 Fixed up shape files as best I can.
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70 if(window == NULL || !SDL_IsShapedWindow(window))
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parents: 4781
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71 //The window given was not a shapeable window.
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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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72 return -2;
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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73 if(shape == NULL)
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74 //Invalid shape argument.
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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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75 return -1;
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76
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77 if(shapeMode != NULL) {
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78 switch(shapeMode->mode) {
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79 case ShapeModeDefault: {
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80 window->shaper->alphacutoff = 1;
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81 break;
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82 }
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83 case ShapeModeBinarizeAlpha: {
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84 window->shaper->alphacutoff = shapeMode->parameters.binarizationCutoff;
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85 break;
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86 }
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87 }
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parents: 4781
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88 }
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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89 //TODO: Platform-specific implementations of SetWindowShape. X11 is finished. Win32 is in progress.
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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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90 result = window->display->device->shape_driver.SetWindowShape(window->shaper,shape,shapeMode);
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91 window->shaper->hasshape = SDL_TRUE;
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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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92 if((window->shaper->usershownflag & SDL_WINDOW_SHOWN) == SDL_WINDOW_SHOWN) {
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93 SDL_ShowWindow(window);
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94 window->shaper->usershownflag &= !SDL_WINDOW_SHOWN;
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95 }
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96 return result;
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97 }
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98
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99 SDL_bool SDL_WindowHasAShape(SDL_Window *window) {
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100 if (window == NULL && !SDL_IsShapedWindow(window))
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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101 return SDL_FALSE;
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102 return window->shaper->hasshape;
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parents: 4776
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103 }
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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104
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105 int SDL_GetShapedWindowMode(SDL_Window *window,SDL_WindowShapeMode *shapeMode) {
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106 if(window != NULL && SDL_IsShapedWindow(window)) {
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107 if(shapeMode == NULL) {
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parents: 4781
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108 if(SDL_WindowHasAShape(window))
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parents: 4781
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109 //The window given has a shape.
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110 return 0;
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parents: 4781
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111 else
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112 //The window given is shapeable but lacks a shape.
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113 return -2;
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Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
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114 }
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
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115 else {
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
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116 if(window->shaper->alphacutoff != 1) {
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
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117 shapeMode->mode = ShapeModeBinarizeAlpha;
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
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118 shapeMode->parameters.binarizationCutoff = window->shaper->alphacutoff;
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
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119 }
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
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120 else
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
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121 shapeMode->mode = ShapeModeDefault;
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
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122 return 0;
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
diff changeset
123 }
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
diff changeset
124 }
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
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125 else
b6930aefd008 Finished X11 shaped-window functionality and removed ellipse+polygon rendering.
Eli Gottlieb <eligottlieb@gmail.com>
parents: 4781
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126 //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
127 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
128 }