SDL_x11shape.c
Go to the documentation of this file.
/*
Simple DirectMedia Layer
Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if SDL_VIDEO_DRIVER_X11
#include "SDL_assert.h"
#include "SDL_x11video.h"
#include "SDL_x11shape.h"
#include "SDL_x11window.h"
#include "../SDL_shape_internals.h"
SDL_WindowShaper*
X11_CreateShaper(SDL_Window* window) {
SDL_WindowShaper* result = NULL;
SDL_ShapeData* data = NULL;
int resized_properly;
#if SDL_VIDEO_DRIVER_X11_XSHAPE
if (SDL_X11_HAVE_XSHAPE) { /* Make sure X server supports it. */
result = malloc(sizeof(SDL_WindowShaper));
result->window = window;
result->mode.mode = ShapeModeDefault;
result->mode.parameters.binarizationCutoff = 1;
result->userx = result->usery = 0;
data = SDL_malloc(sizeof(SDL_ShapeData));
result->driverdata = data;
data->bitmapsize = 0;
data->bitmap = NULL;
window->shaper = result;
resized_properly = X11_ResizeWindowShape(window);
SDL_assert(resized_properly == 0);
}
#endif
return result;
}
int
X11_ResizeWindowShape(SDL_Window* window) {
SDL_ShapeData* data = window->shaper->driverdata;
unsigned int bitmapsize = window->w / 8;
SDL_assert(data != NULL);
if(window->w % 8 > 0)
bitmapsize += 1;
bitmapsize *= window->h;
if(data->bitmapsize != bitmapsize || data->bitmap == NULL) {
data->bitmapsize = bitmapsize;
if(data->bitmap != NULL)
free(data->bitmap);
data->bitmap = malloc(data->bitmapsize);
if(data->bitmap == NULL) {
return SDL_SetError("Could not allocate memory for shaped-window bitmap.");
}
}
memset(data->bitmap,0,data->bitmapsize);
window->shaper->userx = window->x;
window->shaper->usery = window->y;
SDL_SetWindowPosition(window,-1000,-1000);
return 0;
}
int
X11_SetWindowShape(SDL_WindowShaper *shaper,SDL_Surface *shape,SDL_WindowShapeMode *shape_mode) {
SDL_ShapeData *data = NULL;
SDL_WindowData *windowdata = NULL;
Pixmap shapemask;
if(shaper == NULL || shape == NULL || shaper->driverdata == NULL)
return -1;
#if SDL_VIDEO_DRIVER_X11_XSHAPE
if(shape->format->Amask == 0 && SDL_SHAPEMODEALPHA(shape_mode->mode))
return -2;
if(shape->w != shaper->window->w || shape->h != shaper->window->h)
return -3;
data = shaper->driverdata;
/* Assume that shaper->alphacutoff already has a value, because SDL_SetWindowShape() should have given it one. */
SDL_CalculateShapeBitmap(shaper->mode,shape,data->bitmap,8);
windowdata = (SDL_WindowData*)(shaper->window->driverdata);
shapemask = X11_XCreateBitmapFromData(windowdata->videodata->display,windowdata->xwindow,data->bitmap,shaper->window->w,shaper->window->h);
X11_XShapeCombineMask(windowdata->videodata->display,windowdata->xwindow, ShapeBounding, 0, 0,shapemask, ShapeSet);
X11_XSync(windowdata->videodata->display,False);
X11_XFreePixmap(windowdata->videodata->display,shapemask);
#endif
return 0;
}
#endif /* SDL_VIDEO_DRIVER_X11 */
malloc
#define malloc
Definition: SDL_qsort.c:47
X11_SetWindowShape
int X11_SetWindowShape(SDL_WindowShaper *shaper, SDL_Surface *shape, SDL_WindowShapeMode *shapeMode)
SDL_x11video.h
SDL_Surface
A collection of pixels used in software blitting.
Definition: SDL_surface.h:70
NULL
#define NULL
Definition: begin_code.h:167
SDL_Surface::w
int w
Definition: SDL_surface.h:74
SDL_WindowData
Definition: SDL_androidwindow.h:38
SDL_x11shape.h
SDL_SHAPEMODEALPHA
#define SDL_SHAPEMODEALPHA(mode)
Definition: SDL_shape.h:91
result
GLuint64EXT * result
Definition: SDL_opengl_glext.h:9432
SDL_x11window.h
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
SDL_WindowShaper::window
SDL_Window * window
Definition: SDL_sysvideo.h:43
SDL_Window
The type used to identify a window.
Definition: SDL_sysvideo.h:73
SDL_WindowShapeMode
A struct that tags the SDL_WindowShapeParams union with an enum describing the type of its contents.
Definition: SDL_shape.h:101
SDL_ShapeData
Definition: SDL_cocoashape.h:32
SDL_WindowShapeMode::mode
WindowShapeMode mode
The mode of these window-shape parameters.
Definition: SDL_shape.h:103
SDL_Window::w
int w
Definition: SDL_sysvideo.h:80
SDL_WindowData::xwindow
Window xwindow
Definition: SDL_x11window.h:46
window
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
SDL_assert.h
SDL_PixelFormat::Amask
Uint32 Amask
Definition: SDL_pixels.h:325
SDL_assert
#define SDL_assert(condition)
Definition: SDL_assert.h:169
SDL_Window::h
int h
Definition: SDL_sysvideo.h:80
SDL_WindowShaper
Definition: SDL_sysvideo.h:40
SDL_WindowShaper::mode
SDL_WindowShapeMode mode
Definition: SDL_sysvideo.h:49
SDL_Surface::h
int h
Definition: SDL_surface.h:74
SDL_VideoData::display
struct wl_display * display
Definition: SDL_waylandvideo.h:50
SDL_Window::driverdata
void * driverdata
Definition: SDL_sysvideo.h:111
memset
#define memset
Definition: SDL_malloc.c:627
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:30
SDL_WindowData::videodata
struct SDL_VideoData * videodata
Definition: SDL_cocoawindow.h:121
SDL_malloc
#define SDL_malloc
Definition: SDL_dynapi_overrides.h:374
ShapeModeDefault
@ ShapeModeDefault
The default mode, a binarized alpha cutoff of 1.
Definition: SDL_shape.h:82
SDL_WindowShaper::driverdata
void * driverdata
Definition: SDL_sysvideo.h:54
X11_CreateShaper
SDL_WindowShaper * X11_CreateShaper(SDL_Window *window)
SDL_CalculateShapeBitmap
void SDL_CalculateShapeBitmap(SDL_WindowShapeMode mode, SDL_Surface *shape, Uint8 *bitmap, Uint8 ppb)
Definition: SDL_shape.c:71
SDL_SetWindowPosition
#define SDL_SetWindowPosition
Definition: SDL_dynapi_overrides.h:524
free
SDL_EventEntry * free
Definition: SDL_events.c:82
SDL_Surface::format
SDL_PixelFormat * format
Definition: SDL_surface.h:73
X11_ResizeWindowShape
int X11_ResizeWindowShape(SDL_Window *window)