mirror of
https://github.com/Relintai/sdl2_frt.git
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116 lines
3.9 KiB
C
116 lines
3.9 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if SDL_VIDEO_DRIVER_X11
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#include "SDL_assert.h"
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#include "SDL_x11video.h"
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#include "SDL_x11shape.h"
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#include "SDL_x11window.h"
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#include "../SDL_shape_internals.h"
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SDL_WindowShaper*
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X11_CreateShaper(SDL_Window* window) {
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SDL_WindowShaper* result = NULL;
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SDL_ShapeData* data = NULL;
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int resized_properly;
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#if SDL_VIDEO_DRIVER_X11_XSHAPE
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if (SDL_X11_HAVE_XSHAPE) { /* Make sure X server supports it. */
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result = malloc(sizeof(SDL_WindowShaper));
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result->window = window;
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result->mode.mode = ShapeModeDefault;
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result->mode.parameters.binarizationCutoff = 1;
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result->userx = result->usery = 0;
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data = SDL_malloc(sizeof(SDL_ShapeData));
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result->driverdata = data;
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data->bitmapsize = 0;
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data->bitmap = NULL;
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window->shaper = result;
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resized_properly = X11_ResizeWindowShape(window);
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SDL_assert(resized_properly == 0);
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}
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#endif
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return result;
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}
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int
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X11_ResizeWindowShape(SDL_Window* window) {
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SDL_ShapeData* data = window->shaper->driverdata;
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unsigned int bitmapsize = window->w / 8;
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SDL_assert(data != NULL);
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if(window->w % 8 > 0)
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bitmapsize += 1;
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bitmapsize *= window->h;
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if(data->bitmapsize != bitmapsize || data->bitmap == NULL) {
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data->bitmapsize = bitmapsize;
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if(data->bitmap != NULL)
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free(data->bitmap);
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data->bitmap = malloc(data->bitmapsize);
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if(data->bitmap == NULL) {
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return SDL_SetError("Could not allocate memory for shaped-window bitmap.");
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}
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}
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memset(data->bitmap,0,data->bitmapsize);
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window->shaper->userx = window->x;
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window->shaper->usery = window->y;
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SDL_SetWindowPosition(window,-1000,-1000);
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return 0;
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}
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int
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X11_SetWindowShape(SDL_WindowShaper *shaper,SDL_Surface *shape,SDL_WindowShapeMode *shape_mode) {
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SDL_ShapeData *data = NULL;
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SDL_WindowData *windowdata = NULL;
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Pixmap shapemask;
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if(shaper == NULL || shape == NULL || shaper->driverdata == NULL)
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return -1;
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#if SDL_VIDEO_DRIVER_X11_XSHAPE
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if(shape->format->Amask == 0 && SDL_SHAPEMODEALPHA(shape_mode->mode))
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return -2;
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if(shape->w != shaper->window->w || shape->h != shaper->window->h)
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return -3;
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data = shaper->driverdata;
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/* Assume that shaper->alphacutoff already has a value, because SDL_SetWindowShape() should have given it one. */
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SDL_CalculateShapeBitmap(shaper->mode,shape,data->bitmap,8);
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windowdata = (SDL_WindowData*)(shaper->window->driverdata);
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shapemask = X11_XCreateBitmapFromData(windowdata->videodata->display,windowdata->xwindow,data->bitmap,shaper->window->w,shaper->window->h);
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X11_XShapeCombineMask(windowdata->videodata->display,windowdata->xwindow, ShapeBounding, 0, 0,shapemask, ShapeSet);
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X11_XSync(windowdata->videodata->display,False);
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X11_XFreePixmap(windowdata->videodata->display,shapemask);
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#endif
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return 0;
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}
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#endif /* SDL_VIDEO_DRIVER_X11 */
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