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comparison window/SDL_rotozoom.h @ 0:223b71206888

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Initial import
author thib
date Fri, 01 Aug 2008 16:32:45 +0000
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-1:000000000000 0:223b71206888
1
2 /*
3
4 SDL_rotozoom - rotozoomer
5
6 LGPL (c) A. Schiffler
7
8 */
9
10 #ifndef _SDL_rotozoom_h
11 #define _SDL_rotozoom_h
12
13 #include <math.h>
14
15 /* Set up for C function definitions, even when using C++ */
16 #ifdef __cplusplus
17 extern "C" {
18 #endif
19
20 #ifndef M_PI
21 #define M_PI 3.141592654
22 #endif
23
24 #include <SDL.h>
25
26 /* ---- Defines */
27
28 #define SMOOTHING_OFF 0
29 #define SMOOTHING_ON 1
30
31 /* ---- Structures */
32
33 typedef struct tColorRGBA {
34 Uint8 r;
35 Uint8 g;
36 Uint8 b;
37 Uint8 a;
38 } tColorRGBA;
39
40 typedef struct tColorY {
41 Uint8 y;
42 } tColorY;
43
44
45 /* ---- Prototypes */
46
47 #ifdef WIN32
48 #ifdef BUILD_DLL
49 #define DLLINTERFACE __declspec(dllexport)
50 #else
51 #define DLLINTERFACE __declspec(dllimport)
52 #endif
53 #else
54 #define DLLINTERFACE
55 #endif
56
57 /*
58
59 rotozoomSurface()
60
61 Rotates and zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface.
62 'angle' is the rotation in degrees. 'zoom' a scaling factor. If 'smooth' is 1
63 then the destination 32bit surface is anti-aliased. If the surface is not 8bit
64 or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
65
66 */
67
68 DLLINTERFACE SDL_Surface *rotozoomSurface(SDL_Surface * src, double angle, double zoom, int smooth);
69
70
71 /* Returns the size of the target surface for a rotozoomSurface() call */
72
73 DLLINTERFACE void rotozoomSurfaceSize(int width, int height, double angle, double zoom, int *dstwidth,
74 int *dstheight);
75
76 /*
77
78 zoomSurface()
79
80 Zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface.
81 'zoomx' and 'zoomy' are scaling factors for width and height. If 'smooth' is 1
82 then the destination 32bit surface is anti-aliased. If the surface is not 8bit
83 or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
84
85 */
86
87 DLLINTERFACE SDL_Surface *zoomSurface(SDL_Surface * src, double zoomx, double zoomy, int smooth);
88
89 /* Returns the size of the target surface for a zoomSurface() call */
90
91 DLLINTERFACE void zoomSurfaceSize(int width, int height, double zoomx, double zoomy, int *dstwidth, int *dstheight);
92
93
94 /* Ends C function definitions when using C++ */
95 #ifdef __cplusplus
96 };
97 #endif
98
99 #endif /* _SDL_rotozoom_h */