1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/********************************************************************************
* *
* G I F I m a g e O b j e c t *
* *
*********************************************************************************
* Copyright (C) 1998,2022 by Jeroen van der Zijp. All Rights Reserved. *
*********************************************************************************
* 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 3 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 program. If not, see <http://www.gnu.org/licenses/> *
********************************************************************************/
#ifndef FXGIFIMAGE_H
#define FXGIFIMAGE_H
#ifndef FXIMAGE_H
#include "FXImage.h"
#endif
namespace FX {
/// GIF Image class
class FXAPI FXGIFImage : public FXImage {
FXDECLARE(FXGIFImage)
protected:
FXGIFImage(){}
private:
FXGIFImage(const FXGIFImage&);
FXGIFImage &operator=(const FXGIFImage&);
public:
static const FXchar fileExt[];
static const FXchar mimeType[];
public:
/// Construct an image from memory stream formatted as CompuServe GIF format
FXGIFImage(FXApp* a,const FXuchar *pix=nullptr,FXuint opts=0,FXint w=1,FXint h=1);
/// Save pixels into stream in [un]GIF format
virtual FXbool savePixels(FXStream& store) const;
/// Load pixels from stream in CompuServe GIF format
virtual FXbool loadPixels(FXStream& store);
/// Destroy
virtual ~FXGIFImage();
};
#ifndef FXLOADGIF
#define FXLOADGIF
/**
* Check if stream contains a GIF, return true if so.
*/
extern FXAPI FXbool fxcheckGIF(FXStream& store);
/**
* Load an GIF (Graphics Interchange Format) file from a stream; if the flag
* flag is true, the background color is considered transparent. Upon successful return,
* the pixel array and size are returned. If an error occurred, the pixel array is set to NULL.
*/
extern FXAPI FXbool fxloadGIF(FXStream& store,FXColor*& data,FXint& width,FXint& height,FXbool flag=true);
/**
* Save an GIF (Graphics Interchange Format) file to a stream. If flag
* is true, the faster Floyd-Steinberg dither method instead of the slower Wu
* quantization algorithm.
*/
extern FXAPI FXbool fxsaveGIF(FXStream& store,const FXColor *data,FXint width,FXint height,FXbool flag=true);
#endif
}
#endif
|
