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annotate src/video/SDL_shape.c @ 4801:506a9165491b

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Added #define's for error codes returned from SDL shaped-window API.
author Eli Gottlieb <eligottlieb@gmail.com>
date Sun, 18 Jul 2010 22:24:52 -0400
parents a0e096916474
children f14a8c05f5bb
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
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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 */
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"
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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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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"
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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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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) {
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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);
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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;
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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 }
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46 else
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47 return NULL;
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48 }
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49
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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) {
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51 if(window == NULL)
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52 return SDL_FALSE;
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53 else
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a6bc01875d20 Fixed a pair of syntax errors.
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54 return (SDL_bool)(window->shaper != NULL);
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55 }
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56
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57 /* REQUIRES that bitmap point to a w-by-h bitmap with 1bpp. */
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58 void SDL_CalculateShapeBitmap(Uint8 alphacutoff,SDL_Surface *shape,Uint8* bitmap,Uint8 ppb,Uint8 value) {
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59 int x = 0;
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60 int y = 0;
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61 Uint8 r = 0,g = 0,b = 0,alpha = 0;
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62 Uint8* pixel;
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63 Uint32 bitmap_pixel;
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64 if(SDL_MUSTLOCK(shape))
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65 SDL_LockSurface(shape);
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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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66 pixel = (Uint8*)shape->pixels;
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67 for(y = 0;y<shape->h;y++) {
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68 pixel = (Uint8 *)(shape->pixels) + y * shape->pitch;
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69 for(x=0;x<shape->w;x++) {
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70 alpha = 0;
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71 SDL_GetRGBA(*(Uint32*)pixel,shape->format,&r,&g,&b,&alpha);
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72 bitmap_pixel = y*shape->w + x;
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73 bitmap[bitmap_pixel / ppb] |= (alpha >= alphacutoff ? value : 0) << ((ppb - 1) - (bitmap_pixel % ppb));
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74 pixel += shape->format->BytesPerPixel;
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75 }
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76 }
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77 if(SDL_MUSTLOCK(shape))
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78 SDL_UnlockSurface(shape);
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79 }
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80
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81 int SDL_SetWindowShape(SDL_Window *window,SDL_Surface *shape,SDL_WindowShapeMode *shapeMode) {
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82 int result;
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83 if(window == NULL || !SDL_IsShapedWindow(window))
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84 //The window given was not a shapeable window.
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85 return SDL_NONSHAPEABLE_WINDOW;
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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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86 if(shape == NULL)
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87 //Invalid shape argument.
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88 return SDL_INVALID_SHAPE_ARGUMENT;
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89
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90 if(shapeMode != NULL) {
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91 switch(shapeMode->mode) {
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92 case ShapeModeDefault: {
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93 window->shaper->alphacutoff = 1;
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94 break;
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95 }
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96 case ShapeModeBinarizeAlpha: {
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97 window->shaper->alphacutoff = shapeMode->parameters.binarizationCutoff;
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98 break;
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99 }
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100 }
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101 }
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102 //TODO: Platform-specific implementations of SetWindowShape. X11 is finished. Win32 is in progress.
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103 result = window->display->device->shape_driver.SetWindowShape(window->shaper,shape,shapeMode);
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104 window->shaper->hasshape = SDL_TRUE;
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105 if((window->shaper->usershownflag & SDL_WINDOW_SHOWN) == SDL_WINDOW_SHOWN) {
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106 SDL_ShowWindow(window);
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107 window->shaper->usershownflag &= !SDL_WINDOW_SHOWN;
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108 }
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109 return result;
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110 }
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111
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112 SDL_bool SDL_WindowHasAShape(SDL_Window *window) {
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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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113 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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114 return SDL_FALSE;
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115 return window->shaper->hasshape;
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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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116 }
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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117
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118 int SDL_GetShapedWindowMode(SDL_Window *window,SDL_WindowShapeMode *shapeMode) {
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119 if(window != NULL && SDL_IsShapedWindow(window)) {
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120 if(shapeMode == NULL) {
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121 if(SDL_WindowHasAShape(window))
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122 //The window given has a shape.
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123 return 0;
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124 else
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125 //The window given is shapeable but lacks a shape.
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126 return SDL_WINDOW_LACKS_SHAPE;
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127 }
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128 else {
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129 if(window->shaper->alphacutoff != 1) {
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130 shapeMode->mode = ShapeModeBinarizeAlpha;
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131 shapeMode->parameters.binarizationCutoff = window->shaper->alphacutoff;
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132 }
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133 else
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134 shapeMode->mode = ShapeModeDefault;
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135 return 0;
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136 }
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137 }
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138 else
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Eli Gottlieb <eligottlieb@gmail.com>
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139 //The window given is not a valid shapeable window.
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140 return SDL_NONSHAPEABLE_WINDOW;
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Eli Gottlieb <eligottlieb@gmail.com>
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141 }