SDL  2.0
SDL_x11shape.c
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2016 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 
32 X11_CreateShapedWindow(const char *title,unsigned int x,unsigned int y,unsigned int w,unsigned int h,Uint32 flags) {
33  return SDL_CreateWindow(title,x,y,w,h,flags);
34 }
35 
40  int resized_properly;
41 
42 #if SDL_VIDEO_DRIVER_X11_XSHAPE
43  if (SDL_X11_HAVE_XSHAPE) { /* Make sure X server supports it. */
44  result = malloc(sizeof(SDL_WindowShaper));
45  result->window = window;
46  result->mode.mode = ShapeModeDefault;
48  result->userx = result->usery = 0;
49  data = SDL_malloc(sizeof(SDL_ShapeData));
50  result->driverdata = data;
51  data->bitmapsize = 0;
52  data->bitmap = NULL;
53  window->shaper = result;
54  resized_properly = X11_ResizeWindowShape(window);
55  SDL_assert(resized_properly == 0);
56  }
57 #endif
58 
59  return result;
60 }
61 
62 int
64  SDL_ShapeData* data = window->shaper->driverdata;
65  unsigned int bitmapsize = window->w / 8;
66  SDL_assert(data != NULL);
67 
68  if(window->w % 8 > 0)
69  bitmapsize += 1;
70  bitmapsize *= window->h;
71  if(data->bitmapsize != bitmapsize || data->bitmap == NULL) {
72  data->bitmapsize = bitmapsize;
73  if(data->bitmap != NULL)
74  free(data->bitmap);
75  data->bitmap = malloc(data->bitmapsize);
76  if(data->bitmap == NULL) {
77  return SDL_SetError("Could not allocate memory for shaped-window bitmap.");
78  }
79  }
80  memset(data->bitmap,0,data->bitmapsize);
81 
82  window->shaper->userx = window->x;
83  window->shaper->usery = window->y;
84  SDL_SetWindowPosition(window,-1000,-1000);
85 
86  return 0;
87 }
88 
89 int
91  SDL_ShapeData *data = NULL;
92  SDL_WindowData *windowdata = NULL;
93  Pixmap shapemask;
94 
95  if(shaper == NULL || shape == NULL || shaper->driverdata == NULL)
96  return -1;
97 
98 #if SDL_VIDEO_DRIVER_X11_XSHAPE
99  if(shape->format->Amask == 0 && SDL_SHAPEMODEALPHA(shape_mode->mode))
100  return -2;
101  if(shape->w != shaper->window->w || shape->h != shaper->window->h)
102  return -3;
103  data = shaper->driverdata;
104 
105  /* Assume that shaper->alphacutoff already has a value, because SDL_SetWindowShape() should have given it one. */
106  SDL_CalculateShapeBitmap(shaper->mode,shape,data->bitmap,8);
107 
108  windowdata = (SDL_WindowData*)(shaper->window->driverdata);
109  shapemask = X11_XCreateBitmapFromData(windowdata->videodata->display,windowdata->xwindow,data->bitmap,shaper->window->w,shaper->window->h);
110 
111  X11_XShapeCombineMask(windowdata->videodata->display,windowdata->xwindow, ShapeBounding, 0, 0,shapemask, ShapeSet);
112  X11_XSync(windowdata->videodata->display,False);
113 
114  X11_XFreePixmap(windowdata->videodata->display,shapemask);
115 #endif
116 
117  return 0;
118 }
119 
120 #endif /* SDL_VIDEO_DRIVER_X11 */
121 
int X11_ResizeWindowShape(SDL_Window *window)
GLuint64EXT * result
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1567
Uint32 bitmapsize
Definition: SDL_x11shape.h:32
struct wl_display * display
static SDL_Window * window
int X11_SetWindowShape(SDL_WindowShaper *shaper, SDL_Surface *shape, SDL_WindowShapeMode *shapeMode)
SDL_EventEntry * free
Definition: SDL_events.c:81
A collection of pixels used in software blitting.
Definition: SDL_surface.h:69
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1967
#define memset
Definition: SDL_malloc.c:639
#define SDL_CreateWindow
#define SDL_SHAPEMODEALPHA(mode)
Definition: SDL_shape.h:90
uint32_t Uint32
An unsigned 32-bit integer type.
Definition: SDL_stdinc.h:159
SDL_Window * X11_CreateShapedWindow(const char *title, unsigned int x, unsigned int y, unsigned int w, unsigned int h, Uint32 flags)
SDL_WindowShapeMode mode
Definition: SDL_sysvideo.h:47
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1567
SDL_WindowShaper * shaper
Definition: SDL_sysvideo.h:102
struct SDL_VideoData * videodata
SDL_Window * window
Definition: SDL_sysvideo.h:41
The default mode, a binarized alpha cutoff of 1.
Definition: SDL_shape.h:81
SDL_WindowShapeParams parameters
Window-shape parameters.
Definition: SDL_shape.h:104
SDL_WindowShaper * X11_CreateShaper(SDL_Window *window)
#define SDL_assert(condition)
Definition: SDL_assert.h:167
#define NULL
Definition: begin_code.h:143
SDL_PixelFormat * format
Definition: SDL_surface.h:72
#define malloc
Definition: SDL_malloc.c:641
#define SDL_SetError
The type used to identify a window.
Definition: SDL_sysvideo.h:71
Uint8 binarizationCutoff
a cutoff alpha value for binarization of the window shape&#39;s alpha channel.
Definition: SDL_shape.h:95
GLbitfield flags
#define SDL_malloc
A struct that tags the SDL_WindowShapeParams union with an enum describing the type of its contents...
Definition: SDL_shape.h:100
GLubyte GLubyte GLubyte GLubyte w
void * driverdata
Definition: SDL_sysvideo.h:109
WindowShapeMode mode
The mode of these window-shape parameters.
Definition: SDL_shape.h:102
#define SDL_SetWindowPosition
GLfloat GLfloat GLfloat GLfloat h
void SDL_CalculateShapeBitmap(SDL_WindowShapeMode mode, SDL_Surface *shape, Uint8 *bitmap, Uint8 ppb)
Definition: SDL_shape.c:67