SDL  2.0
SDL_x11shape.c
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
4 
5  This software is provided 'as-is', without any express or implied
6  warranty. In no event will the authors be held liable for any damages
7  arising from the use of this software.
8 
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12 
13  1. The origin of this software must not be misrepresented; you must not
14  claim that you wrote the original software. If you use this software
15  in a product, an acknowledgment in the product documentation would be
16  appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18  misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20 */
21 #include "../../SDL_internal.h"
22 
23 #if SDL_VIDEO_DRIVER_X11
24 
25 #include "SDL_assert.h"
26 #include "SDL_x11video.h"
27 #include "SDL_x11shape.h"
28 #include "SDL_x11window.h"
29 #include "../SDL_shape_internals.h"
30 
35  int resized_properly;
36 
37 #if SDL_VIDEO_DRIVER_X11_XSHAPE
38  if (SDL_X11_HAVE_XSHAPE) { /* Make sure X server supports it. */
39  result = malloc(sizeof(SDL_WindowShaper));
40  result->window = window;
41  result->mode.mode = ShapeModeDefault;
43  result->userx = result->usery = 0;
44  data = SDL_malloc(sizeof(SDL_ShapeData));
45  result->driverdata = data;
46  data->bitmapsize = 0;
47  data->bitmap = NULL;
48  window->shaper = result;
49  resized_properly = X11_ResizeWindowShape(window);
50  SDL_assert(resized_properly == 0);
51  }
52 #endif
53 
54  return result;
55 }
56 
57 int
59  SDL_ShapeData* data = window->shaper->driverdata;
60  unsigned int bitmapsize = window->w / 8;
61  SDL_assert(data != NULL);
62 
63  if(window->w % 8 > 0)
64  bitmapsize += 1;
65  bitmapsize *= window->h;
66  if(data->bitmapsize != bitmapsize || data->bitmap == NULL) {
67  data->bitmapsize = bitmapsize;
68  if(data->bitmap != NULL)
69  free(data->bitmap);
70  data->bitmap = malloc(data->bitmapsize);
71  if(data->bitmap == NULL) {
72  return SDL_SetError("Could not allocate memory for shaped-window bitmap.");
73  }
74  }
75  memset(data->bitmap,0,data->bitmapsize);
76 
77  window->shaper->userx = window->x;
78  window->shaper->usery = window->y;
79  SDL_SetWindowPosition(window,-1000,-1000);
80 
81  return 0;
82 }
83 
84 int
86  SDL_ShapeData *data = NULL;
87  SDL_WindowData *windowdata = NULL;
88  Pixmap shapemask;
89 
90  if(shaper == NULL || shape == NULL || shaper->driverdata == NULL)
91  return -1;
92 
93 #if SDL_VIDEO_DRIVER_X11_XSHAPE
94  if(shape->format->Amask == 0 && SDL_SHAPEMODEALPHA(shape_mode->mode))
95  return -2;
96  if(shape->w != shaper->window->w || shape->h != shaper->window->h)
97  return -3;
98  data = shaper->driverdata;
99 
100  /* Assume that shaper->alphacutoff already has a value, because SDL_SetWindowShape() should have given it one. */
101  SDL_CalculateShapeBitmap(shaper->mode,shape,data->bitmap,8);
102 
103  windowdata = (SDL_WindowData*)(shaper->window->driverdata);
104  shapemask = X11_XCreateBitmapFromData(windowdata->videodata->display,windowdata->xwindow,data->bitmap,shaper->window->w,shaper->window->h);
105 
106  X11_XShapeCombineMask(windowdata->videodata->display,windowdata->xwindow, ShapeBounding, 0, 0,shapemask, ShapeSet);
107  X11_XSync(windowdata->videodata->display,False);
108 
109  X11_XFreePixmap(windowdata->videodata->display,shapemask);
110 #endif
111 
112  return 0;
113 }
114 
115 #endif /* SDL_VIDEO_DRIVER_X11 */
int X11_ResizeWindowShape(SDL_Window *window)
GLuint64EXT * result
Uint32 bitmapsize
Definition: SDL_x11shape.h:32
struct wl_display * display
int X11_SetWindowShape(SDL_WindowShaper *shaper, SDL_Surface *shape, SDL_WindowShapeMode *shapeMode)
SDL_EventEntry * free
Definition: SDL_events.c:84
A collection of pixels used in software blitting.
Definition: SDL_surface.h:69
#define memset
Definition: SDL_malloc.c:619
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
#define SDL_SHAPEMODEALPHA(mode)
Definition: SDL_shape.h:91
SDL_WindowShapeMode mode
Definition: SDL_sysvideo.h:49
SDL_WindowShaper * shaper
Definition: SDL_sysvideo.h:104
struct SDL_VideoData * videodata
SDL_Window * window
Definition: SDL_sysvideo.h:43
The default mode, a binarized alpha cutoff of 1.
Definition: SDL_shape.h:82
SDL_WindowShapeParams parameters
Window-shape parameters.
Definition: SDL_shape.h:105
SDL_WindowShaper * X11_CreateShaper(SDL_Window *window)
#define SDL_assert(condition)
Definition: SDL_assert.h:169
#define NULL
Definition: begin_code.h:164
SDL_PixelFormat * format
Definition: SDL_surface.h:72
#define SDL_SetError
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
The type used to identify a window.
Definition: SDL_sysvideo.h:73
Uint8 binarizationCutoff
A cutoff alpha value for binarization of the window shape&#39;s alpha channel.
Definition: SDL_shape.h:96
#define SDL_malloc
A struct that tags the SDL_WindowShapeParams union with an enum describing the type of its contents...
Definition: SDL_shape.h:101
void * driverdata
Definition: SDL_sysvideo.h:111
WindowShapeMode mode
The mode of these window-shape parameters.
Definition: SDL_shape.h:103
#define SDL_SetWindowPosition
#define malloc
Definition: SDL_qsort.c:47
void SDL_CalculateShapeBitmap(SDL_WindowShapeMode mode, SDL_Surface *shape, Uint8 *bitmap, Uint8 ppb)
Definition: SDL_shape.c:71