/*

SDL - Simple DirectMedia Layer

Copyright (C) 2010 Eli Gottlieb

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Eli Gottlieb

eligottlieb@gmail.com

*/

#include "SDL_win32shape.h"

#include "SDL_win32video.h"

int resized_properly;

SDL_WindowShaper* result = (SDL_WindowShaper *)SDL_malloc(sizeof(SDL_WindowShaper));

result->mode.mode = ShapeModeDefault;

result->mode.parameters.binarizationCutoff = 1;

result->usershownflag = 0;

//Put some driver-data here.

window->shaper = result;

resized_properly = Win32_ResizeWindowShape(window);

if (resized_properly != 0)

return NULL;

return result;

}

void CombineRectRegions(SDL_ShapeTree* node, void* closure) {

HRGN* mask_region = (HRGN *)closure;

if(node->kind == OpaqueShape) {

HRGN temp_region = CreateRectRgn(node->data.shape.x,node->data.shape.y,node->data.shape.w,node->data.shape.h);

CombineRgn(*mask_region,*mask_region,temp_region, RGN_OR);

DeleteObject(temp_region);

}

}

SDL_ShapeData *data;

HRGN mask_region;

SDL_WindowData *windowdata;

HWND hwnd;

if (shaper == NULL || shape == NULL)

return SDL_INVALID_SHAPE_ARGUMENT;

if(!SDL_ISPIXELFORMAT_ALPHA(SDL_MasksToPixelFormatEnum(shape->format->BitsPerPixel,shape->format->Rmask,shape->format->Gmask,shape->format->Bmask,shape->format->Amask)) && shapeMode->mode != ShapeModeColorKey || shape->w != shaper->window->w || shape->h != shaper->window->h)

return SDL_INVALID_SHAPE_ARGUMENT;

data = (SDL_ShapeData*)shaper->driverdata;

data->mask_tree = SDL_CalculateShapeTree(*shapeMode,shape,SDL_FALSE);

/*

* Set the new region mask for the window

*/

windowdata=(SDL_WindowData *)(shaper->window->driverdata);

hwnd = windowdata->hwnd;

SetWindowRgn(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);

return 0;

}