source: liacs/MIR2010/SourceCode/cximage/ximawbmp.cpp@ 184

Last change on this file since 184 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: ximawbmp.cpp
3 * Purpose: Platform Independent WBMP Image Class Loader and Writer
4 * 12/Jul/2002 Davide Pizzolato - www.xdp.it
5 * CxImage version 6.0.0 02/Feb/2008
6 */
7
8#include "ximawbmp.h"
9
10#if CXIMAGE_SUPPORT_WBMP
11
12#include "ximaiter.h"
13
14////////////////////////////////////////////////////////////////////////////////
15#if CXIMAGE_SUPPORT_DECODE
16////////////////////////////////////////////////////////////////////////////////
17bool CxImageWBMP::Decode(CxFile *hFile)
18{
19 if (hFile == NULL) return false;
20
21 WBMPHEADER wbmpHead;
22
23 cx_try
24 {
25 ReadOctet(hFile, &wbmpHead.Type);
26
27 DWORD dat;
28 ReadOctet(hFile, &dat);
29 wbmpHead.FixHeader = (BYTE)dat;
30
31 ReadOctet(hFile, &wbmpHead.ImageWidth);
32 ReadOctet(hFile, &wbmpHead.ImageHeight);
33
34 if (hFile->Eof())
35 cx_throw("Not a WBMP");
36
37 if (wbmpHead.Type != 0)
38 cx_throw("Unsupported WBMP type");
39
40 head.biWidth = wbmpHead.ImageWidth;
41 head.biHeight= wbmpHead.ImageHeight;
42
43 if (head.biWidth<=0 || head.biHeight<=0)
44 cx_throw("Corrupted WBMP");
45
46 if (info.nEscape == -1){
47 info.dwType = CXIMAGE_FORMAT_WBMP;
48 return true;
49 }
50
51 Create(head.biWidth, head.biHeight, 1, CXIMAGE_FORMAT_WBMP);
52 if (!IsValid()) cx_throw("WBMP Create failed");
53 SetGrayPalette();
54
55 int linewidth=(head.biWidth+7)/8;
56 CImageIterator iter(this);
57 iter.Upset();
58 for (long y=0; y < head.biHeight; y++){
59 hFile->Read(iter.GetRow(),linewidth,1);
60 iter.PrevRow();
61 }
62
63 } cx_catch {
64 if (strcmp(message,"")) strncpy(info.szLastError,message,255);
65 return FALSE;
66 }
67 return true;
68}
69////////////////////////////////////////////////////////////////////////////////
70bool CxImageWBMP::ReadOctet(CxFile * hFile, DWORD *data)
71{
72 BYTE c;
73 *data = 0;
74 do {
75 if (hFile->Eof()) return false;
76 c = (BYTE)hFile->GetC();
77 *data <<= 7;
78 *data |= (c & 0x7F);
79 } while ((c&0x80)!=0);
80 return true;
81}
82////////////////////////////////////////////////////////////////////////////////
83#endif //CXIMAGE_SUPPORT_DECODE
84////////////////////////////////////////////////////////////////////////////////
85#if CXIMAGE_SUPPORT_ENCODE
86////////////////////////////////////////////////////////////////////////////////
87bool CxImageWBMP::Encode(CxFile * hFile)
88{
89 if (EncodeSafeCheck(hFile)) return false;
90
91 //check format limits
92 if (head.biBitCount!=1){
93 strcpy(info.szLastError,"Can't save this image as WBMP");
94 return false;
95 }
96
97 WBMPHEADER wbmpHead;
98 wbmpHead.Type=0;
99 wbmpHead.FixHeader=0;
100 wbmpHead.ImageWidth=head.biWidth;
101 wbmpHead.ImageHeight=head.biHeight;
102
103 // Write the file header
104 hFile->PutC('\0');
105 hFile->PutC('\0');
106 WriteOctet(hFile,wbmpHead.ImageWidth);
107 WriteOctet(hFile,wbmpHead.ImageHeight);
108 // Write the pixels
109 int linewidth=(wbmpHead.ImageWidth+7)/8;
110 CImageIterator iter(this);
111 iter.Upset();
112 for (DWORD y=0; y < wbmpHead.ImageHeight; y++){
113 hFile->Write(iter.GetRow(),linewidth,1);
114 iter.PrevRow();
115 }
116 return true;
117}
118////////////////////////////////////////////////////////////////////////////////
119bool CxImageWBMP::WriteOctet(CxFile * hFile, const DWORD data)
120{
121 int ns = 0;
122 while (data>>(ns+7)) ns+=7;
123 while (ns>0){
124 if (!hFile->PutC(0x80 | (BYTE)(data>>ns))) return false;
125 ns-=7;
126 }
127 if (!(hFile->PutC((BYTE)(0x7F & data)))) return false;
128 return true;
129}
130////////////////////////////////////////////////////////////////////////////////
131#endif // CXIMAGE_SUPPORT_ENCODE
132////////////////////////////////////////////////////////////////////////////////
133#endif // CXIMAGE_SUPPORT_WBMP
134
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