SDL 2.0
SDL_x11shape.c
Go to the documentation of this file.
1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2019 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. */
40 result->window = window;
41 result->mode.mode = ShapeModeDefault;
42 result->mode.parameters.binarizationCutoff = 1;
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
57int
59 SDL_ShapeData* data = window->shaper->driverdata;
60 unsigned int bitmapsize = window->w / 8;
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
84int
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 */
#define SDL_assert(condition)
Definition: SDL_assert.h:169
#define SDL_SetError
#define SDL_SetWindowPosition
#define SDL_malloc
SDL_EventEntry * free
Definition: SDL_events.c:82
#define memset
Definition: SDL_malloc.c:627
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
GLuint64EXT * result
#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
@ ShapeModeDefault
The default mode, a binarized alpha cutoff of 1.
Definition: SDL_shape.h:82
#define SDL_SHAPEMODEALPHA(mode)
Definition: SDL_shape.h:91
int X11_ResizeWindowShape(SDL_Window *window)
int X11_SetWindowShape(SDL_WindowShaper *shaper, SDL_Surface *shape, SDL_WindowShapeMode *shapeMode)
SDL_WindowShaper * X11_CreateShaper(SDL_Window *window)
#define NULL
Definition: begin_code.h:167
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
A collection of pixels used in software blitting.
Definition: SDL_surface.h:71
SDL_PixelFormat * format
Definition: SDL_surface.h:73
struct wl_display * display
struct SDL_VideoData * videodata
The type used to identify a window.
Definition: SDL_sysvideo.h:74
void * driverdata
Definition: SDL_sysvideo.h:111
A struct that tags the SDL_WindowShapeParams union with an enum describing the type of its contents.
Definition: SDL_shape.h:101
WindowShapeMode mode
The mode of these window-shape parameters.
Definition: SDL_shape.h:103
SDL_Window * window
Definition: SDL_sysvideo.h:43
SDL_WindowShapeMode mode
Definition: SDL_sysvideo.h:49