source: liacs/MIR2010/SourceCode/cximage/ximaska.cpp@ 247

Last change on this file since 247 was 95, checked in by Rick van der Zwet, 15 years ago

Bad boy, improper move of directory
File size: 3.5 KB
Line 
1/*
2 * File: ximaska.cpp
3 * Purpose: Platform Independent SKA Image Class Loader and Writer
4 * 25/Sep/2007 Davide Pizzolato - www.xdp.it
5 * CxImage version 6.0.0 02/Feb/2008
6 */
7
8#include "ximaska.h"
9
10#if CXIMAGE_SUPPORT_SKA
11
12////////////////////////////////////////////////////////////////////////////////
13#if CXIMAGE_SUPPORT_DECODE
14////////////////////////////////////////////////////////////////////////////////
15bool CxImageSKA::Decode(CxFile *hFile)
16{
17 if (hFile==NULL)
18 return false;
19
20 // read the header
21 SKAHEADER ska_header;
22 hFile->Read(&ska_header,sizeof(SKAHEADER),1);
23
24 ska_header.Width = ntohs(ska_header.Width);
25 ska_header.Height = ntohs(ska_header.Height);
26 ska_header.dwUnknown = ntohl(ska_header.dwUnknown);
27
28 // check header
29 if (ska_header.dwUnknown != 0x01000000 ||
30 ska_header.Width > 0x7FFF || ska_header.Height > 0x7FFF ||
31 ska_header.BppExp != 3)
32 return false;
33
34 if (info.nEscape == -1){
35 head.biWidth = ska_header.Width ;
36 head.biHeight= ska_header.Height;
37 info.dwType = CXIMAGE_FORMAT_SKA;
38 return true;
39 }
40
41 int bpp = 1<<ska_header.BppExp;
42
43 Create(ska_header.Width,ska_header.Height,bpp,CXIMAGE_FORMAT_SKA);
44 if (!IsValid())
45 return false;
46
47 // read the palette
48 int nColors = 1<<bpp;
49 rgb_color* ppal = (rgb_color*)malloc(nColors*sizeof(rgb_color));
50 if (!ppal) return false;
51 hFile->Read(ppal,nColors*sizeof(rgb_color),1);
52 SetPalette(ppal,nColors);
53 free(ppal);
54
55 //read the image
56 hFile->Read(GetBits(),ska_header.Width*ska_header.Height,1);
57
58 //reorder rows
59 if (GetEffWidth() != ska_header.Width){
60 BYTE *src,*dst;
61 src = GetBits() + ska_header.Width*(ska_header.Height-1);
62 dst = GetBits(ska_header.Height-1);
63 for(int y=0;y<ska_header.Height;y++){
64 memcpy(dst,src,ska_header.Width);
65 src -= ska_header.Width;
66 dst -= GetEffWidth();
67 }
68 }
69
70 Flip();
71
72 return true;
73}
74////////////////////////////////////////////////////////////////////////////////
75#endif //CXIMAGE_SUPPORT_DECODE
76////////////////////////////////////////////////////////////////////////////////
77#if CXIMAGE_SUPPORT_ENCODE
78////////////////////////////////////////////////////////////////////////////////
79bool CxImageSKA::Encode(CxFile * hFile)
80{
81 if (EncodeSafeCheck(hFile)) return false;
82
83 if(head.biBitCount > 8) {
84 strcpy(info.szLastError,"SKA Images must be 8 bit or less");
85 return false;
86 }
87
88 SKAHEADER ska_header;
89
90 ska_header.Width = (unsigned short)GetWidth();
91 ska_header.Height = (unsigned short)GetHeight();
92 ska_header.BppExp = 3;
93 ska_header.dwUnknown = 0x01000000;
94
95 ska_header.Width = ntohs(ska_header.Width);
96 ska_header.Height = ntohs(ska_header.Height);
97 ska_header.dwUnknown = ntohl(ska_header.dwUnknown);
98
99 hFile->Write(&ska_header,sizeof(SKAHEADER),1);
100
101 ska_header.Width = ntohs(ska_header.Width);
102 ska_header.Height = ntohs(ska_header.Height);
103 ska_header.dwUnknown = ntohl(ska_header.dwUnknown);
104
105 if (head.biBitCount<8) IncreaseBpp(8);
106
107 rgb_color pal[256];
108 for(int idx=0; idx<256; idx++){
109 GetPaletteColor(idx,&(pal[idx].r),&(pal[idx].g),&(pal[idx].b));
110 }
111
112 hFile->Write(pal,256*sizeof(rgb_color),1);
113
114 BYTE* src = GetBits(ska_header.Height-1);
115 for(int y=0;y<ska_header.Height;y++){
116 hFile->Write(src,ska_header.Width,1);
117 src -= GetEffWidth();
118 }
119
120 return true;
121}
122////////////////////////////////////////////////////////////////////////////////
123#endif // CXIMAGE_SUPPORT_ENCODE
124////////////////////////////////////////////////////////////////////////////////
125#endif // CXIMAGE_SUPPORT_SKA
126
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