void
SDL_FreeShapeTree(SDL_ShapeTree** shape_tree) {
if((*shape_tree)->kind == QuadShape) {
SDL_FreeShapeTree((SDL_ShapeTree **)&(*shape_tree)->data.children.upleft);
SDL_FreeShapeTree((SDL_ShapeTree **)&(*shape_tree)->data.children.upright);
SDL_FreeShapeTree((SDL_ShapeTree **)&(*shape_tree)->data.children.downleft);
SDL_FreeShapeTree((SDL_ShapeTree **)&(*shape_tree)->data.children.downright);
}
SDL_free(*shape_tree);
*shape_tree = NULL;
}
int
Win32_SetWindowShape(SDL_WindowShaper *shaper,SDL_Surface *shape,SDL_WindowShapeMode *shape_mode) {
SDL_ShapeData *data;
HRGN mask_region = NULL;
if( (shaper == NULL) ||
(shape == NULL) ||
((shape->format->Amask == 0) && (shape_mode->mode != ShapeModeColorKey)) ||
(shape->w != shaper->window->w) ||
(shape->h != shaper->window->h) ) {
return SDL_INVALID_SHAPE_ARGUMENT;
}
data = (SDL_ShapeData*)shaper->driverdata;
if(data->mask_tree != NULL)
SDL_FreeShapeTree(&data->mask_tree);
data->mask_tree = SDL_CalculateShapeTree(*shape_mode,shape);
SDL_TraverseShapeTree(data->mask_tree,&CombineRectRegions,&mask_region);
SDL_assert(mask_region != NULL);
SetWindowRgn(((SDL_WindowData *)(shaper->window->driverdata))->hwnd, mask_region, TRUE);
return 0;
}
int
Win32_ResizeWindowShape(SDL_Window *window) {
SDL_ShapeData* data;
if (window == NULL)
return -1;
data = (SDL_ShapeData *)window->shaper->driverdata;
if (data == NULL)
return -1;
if(data->mask_tree != NULL)
SDL_FreeShapeTree(&data->mask_tree);
if(window->shaper->hasshape == SDL_TRUE) {
window->shaper->userx = window->x;
window->shaper->usery = window->y;
SDL_SetWindowPosition(window,-1000,-1000);
}
return 0;
}