1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2021 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#ifndef SDL_shape_internals_h_
24#define SDL_shape_internals_h_
25
26#include "SDL_rect.h"
27#include "SDL_shape.h"
28#include "SDL_surface.h"
29
30#include "begin_code.h"
31/* Set up for C function definitions, even when using C++ */
32#ifdef __cplusplus
33/* *INDENT-OFF* */
34extern "C" {
35/* *INDENT-ON* */
36#endif
37
38struct SDL_ShapeTree;
39
40typedef struct {
41 struct SDL_ShapeTree *upleft,*upright,*downleft,*downright;
42} SDL_QuadTreeChildren;
43
44typedef union {
45 SDL_QuadTreeChildren children;
46 SDL_Rect shape;
47} SDL_ShapeUnion;
48
49typedef enum { QuadShape,TransparentShape,OpaqueShape } SDL_ShapeKind;
50
51typedef struct SDL_ShapeTree {
52 SDL_ShapeKind kind;
53 SDL_ShapeUnion data;
54} SDL_ShapeTree;
55
56typedef void(*SDL_TraversalFunction)(SDL_ShapeTree*,void*);
57
58extern void SDL_CalculateShapeBitmap(SDL_WindowShapeMode mode,SDL_Surface *shape,Uint8* bitmap,Uint8 ppb);
59extern SDL_ShapeTree* SDL_CalculateShapeTree(SDL_WindowShapeMode mode,SDL_Surface* shape);
60extern void SDL_TraverseShapeTree(SDL_ShapeTree *tree,SDL_TraversalFunction function,void* closure);
61extern void SDL_FreeShapeTree(SDL_ShapeTree** shape_tree);
62
63/* Ends C function definitions when using C++ */
64#ifdef __cplusplus
65/* *INDENT-OFF* */
66}
67/* *INDENT-ON* */
68#endif
69#include "close_code.h"
70
71#endif
72