以VC++。NET为平台，实现BMP格式图片的打开，保存，显示以及BMP转PCX，求代码~~
以VC++。NET为平台，实现BMP格式图片的打开，保存，显示以及BMP转PCX，求代码
那位高人指点一下，或发到我的E-MAIL：
lxf1984lxf@yahoo.com.cn
问题点数：100、回复次数：17Top
1 楼lxf1984lxf（）回复于 2006-05-01 16:15:58 得分 0
知道的高人请指点一下啊，很急~~~~
谢谢了~~~Top
2 楼cainiaoxuefei（萍水相逢,尽是他人之妻）回复于 2006-05-01 17:51:03 得分 0
给钱不？Top
3 楼lxf1984lxf（）回复于 2006-05-01 19:50:45 得分 0
要多少啊？？Top
4 楼lxf1984lxf（）回复于 2006-05-03 11:26:07 得分 0
那个高手指点一下啊 ！！！
急急急啊~~~~~~~~Top
5 楼ChrisAK（LOLICON）回复于 2006-05-03 14:28:02 得分 0
Bmp打开,显示,保存靠GDI+就OK了..
至于那个PCX...
恐怕要自己写转换程序了Top
6 楼lxf1984lxf（）回复于 2006-05-03 22:38:12 得分 0
问题是必须要用VC++啊~~
转换的程序不会啊~~
下面是：PCX文件格式
ZSoft PCX File Format Technical Reference Manual
Introduction 2
Image File (.PCX) Format 3
ZSoft .PCX FILE HEADER FORMAT 4
Decoding .PCX Files 6
Palette Information Description 7
EGA/VGA 16 Color Palette Information 7
VGA 256 Color Palette Information 7
24-Bit .PCX Files 8
CGA Color Palette Information 8
CGA Color Map 8
PC Paintbrush Bitmap Character Format 9
Sample "C" Routines 10
FRIEZE Technical Information 14
General FRIEZE Information 14
7.00 and Later FRIEZE 14
FRIEZE Function Calls 15
FRIEZE Error Codes 18
Introduction
This booklet was designed to aid developers and users in understanding
the technical aspects of the .PCX file format and the use of FRIEZE.
Any comments, questions or suggestions about this booklet should be
sent to:
ZSoft Corporation
Technical Services
ATTN: Code Librarian
450 Franklin Rd. Suite 100
Marietta, GA 30067
Technical Reference Manual information compiled by:
Dean Ansley
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7 楼lxf1984lxf（）回复于 2006-05-03 22:38:42 得分 0
Revision 5
To down load additional information and the source for a complete
Turbo Pascal program to show .PCX files on a CGA/EGA/VGA graphics
display, call our BBS at (404)427-1045. You may use a 9600 baud
modem or a 2400 baud standard modem. Your modem should be set for
8 data bits, 1 stop bit, and NO parity.
Image File (.PCX) Format
If you have technical questions on the format, please do not call
technical support. ZSoft provides this document as a courtesy to
its users and developers. It is not the function of Technical Support
to provide programming assistance. If something is not clear, leave a
message on our BBS, Compuserve, or write us a letter at the above address.
The information in this section will be useful if you want to write a
program to read or write PCX files (images). If you want to write a
special case program for one particular image format you should be able
to produce something that runs twice as fast as "Load from..." in
PC Paintbrush.
Image files used by PC Paintbrush product family and FRIEZE (those with a
.PCX extension) begin with a 128 byte header. Usually you can ignore this
header, since your images will probably all have the same resolution. If
you want to process different resolutions or colors, you will need to
interpret the header correctly. The remainder of the image file consists
of encoded graphic data. The encoding method is a simple byte oriented
run-length technique. We reserve the right to change this method to
improve space efficiency. When more than one color plane is stored in
the file, each line of the image is stored by color plane (generally ordered
red, green, blue, intensity), As shown below.
Scan line 0: RRR... (Plane 0)
GGG... (Plane 1)
BBB... (Plane 2)
III... (Plane 3)
Scan line 1: RRR...
GGG...
BBB...
III... (etc.)
The encoding method is:
FOR each byte, X, read from the file
IF the top two bits of X are 1's then
count = 6 lowest bits of X
data = next byte following X
ELSE
count = 1
data = X
Since the overhead this technique requires is, on average, 25% of
the non-repeating data and is at least offset whenever bytes are repeated,
the file storage savings are usually considerable.
ZSoft .PCX FILE HEADER FORMAT
Byte Item Size Description/Comments
0 Manufacturer 1 Constant Flag, 10 = ZSoft .pcx
1 Version 1 Version information
0 = Version 2.5 of PC Paintbrush
2 = Version 2.8 w/palette information
3 = Version 2.8 w/o palette information
4 = PC Paintbrush for Windows(Plus for
Windows uses Ver 5)
5 = Version 3.0 and > of PC Paintbrush
and PC Paintbrush +, includes
Publisher's Paintbrush . Includes
24-bit .PCX files
2 Encoding 1 1 = .PCX run length encoding
3 BitsPerPixel 1 Number of bits to represent a pixel
(per Plane) - 1, 2, 4, or 8
4 Window 8 Image Dimensions: Xmin,Ymin,Xmax,Ymax
12 HDpi 2 Horizontal Resolution of image in DPI*
14 VDpi 2 Vertical Resolution of image in DPI*
16 Colormap 48 Color palette setting, see text
64 Reserved 1 Should be set to 0.
65 NPlanes 1 Number of color planes
66 BytesPerLine 2 Number of bytes to allocate for a scanline
plane. MUST be an EVEN number. Do NOT
calculate from Xmax-Xmin.
68 PaletteInfo 2 How to interpret palette- 1 = Color/BW,
2 = Grayscale (ignored in PB IV/ IV +)
70 HscreenSize 2 Horizontal screen size in pixels. New field
found only in PB IV/IV Plus
72 VscreenSize 2 Vertical screen size in pixels. New field
found only in PB IV/IV Plus
74 Filler 54 Blank to fill out 128 byte header. Set all
bytes to 0
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8 楼lxf1984lxf（）回复于 2006-05-03 22:39:16 得分 0
NOTES:
All sizes are measured in BYTES.
All variables of SIZE 2 are integers.
*HDpi and VDpi represent the Horizontal and Vertical resolutions which the
image was created (either printer or scanner); i.e. an image which was
scanned might have 300 and 300 in each of these fields.
Decoding .PCX Files
First, find the pixel dimensions of the image by calculating
[XSIZE = Xmax - Xmin + 1] and [YSIZE = Ymax - Ymin + 1]. Then calculate
how many bytes are required to hold one complete uncompressed scan line:
TotalBytes = NPlanes * BytesPerLine
Note that since there are always an even number of bytes per scan line,
there will probably be unused data at the end of each scan line. TotalBytes
shows how much storage must be available to decode each scan line, including
any blank area on the right side of the image. You can now begin decoding
the first scan line - read the first byte of data from the file. If the
top two bits are set, the remaining six bits in the byte show how many times
to duplicate the next byte in the file. If the top two bits are not set,
the first byte is the data itself, with a count of one.
Continue decoding the rest of the line. Keep a running subtotal of how
many bytes are moved and duplicated into the output buffer. When the
subtotal equals TotalBytes, the scan line is complete. There should always
be a decoding break at the end of each scan line. But there will not be a
decoding break at the end of each plane within each scan line. When the
scan line is completed, there may be extra blank data at the end of each
plane within the scan line. Use the XSIZE and YSIZE values to find where
the valid image data is. If the data is multi-plane, BytesPerLine shows
where each plane ends within the scan line.
Continue decoding the remainder of the scan lines (do not just read to
end-of-file). There may be additional data after the end of the image
(palette, etc.)
Palette Information Description
EGA/VGA 16 Color Palette Information
In standard RGB format (IBM EGA, IBM VGA) the data is stored as 16 triples.
Each triple is a 3 byte quantity of Red, Green, Blue values. The values can
range from 0-255, so some interpretation may be necessary. On an IBM EGA,
for example, there are 4 possible levels of RGB for each color. Since
256/4 = 64, the following is a list of the settings and levels:
Setting Level
0-63 0
64-127 1
128-192 2
193-254 3
VGA 256 Color Palette Information
ZSoft has recently added the capability to store palettes containing more
than 16 colors in the .PCX image file. The 256 color palette is formatted
and treated the same as the 16 color palette, except that it is substantially
longer. The palette (number of colors x 3 bytes in length) is appended to
the end of the .PCX file, and is preceded by a 12 decimal. Since the VGA
device expects a palette value to be 0-63 instead of 0-255, you need to
divide the values read in the palette by 4.
To access a 256 color palette:
First, check the version number in the header; if it contains a 5 there is
a palette.
Second, read to the end of the file and count back 769 bytes. The value
you find should be a 12 decimal, showing the presence of a 256 color palette.
24-Bit .PCX Files
24 bit images are stored as version 5 or above as 8 bit, 3 plane images.
24 bit images do not contain a palette.
Bit planes are ordered as lines of red, green, blue in that order.
CGA Color Palette Information
NOTE: This is no longer supported for PC Paintbrush IV/IV Plus.
For a standard IBM CGA board, the palette settings are a bit more complex.
Only the first byte of the triple is used. The first triple has a valid
first byte which represents the background color. To find the background,
take the (unsigned) byte value and divide by 16. This will give a result
between 0-15, hence the background color. The second triple has a valid
first byte, which represents the foreground palette. PC Paintbrush supports
8 possible CGA palettes, so when the foreground setting is encoded between
0 and 255, there are 8 ranges of numbers and the divisor is 32.
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9 楼jiangsheng（蒋晟.Net[MVP]）回复于 2006-05-04 00:26:46 得分 0
www.codeproject.com/bitmap/cximage.aspTop
10 楼lxf1984lxf（）回复于 2006-05-10 20:05:01 得分 0
难到没人给个具体点的么？？
愚昧~~~Top
11 楼leon1983（）回复于 2006-05-18 20:21:10 得分 0
急 求求那位大哥了啊Top
12 楼wawowawoo（）回复于 2006-05-18 22:39:17 得分 0
帮顶Top
13 楼candlelight（candlelight）回复于 2006-05-20 16:45:20 得分 0
无聊，写了个打开bmp的程序，一下是核心代码：
void CViewBmpDlg::OnOpen()
{
// TODO: Add your control notification handler code here
CFileDialog file(TRUE);
if(!file.DoModal())
return;
HANDLE hFile=::CreateFile(file.GetFileName(),GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
if(hFile==INVALID_HANDLE_VALUE)
{
::AfxMessageBox(_T("读取文件出错!"));
return;
}
//创建内存映射对象
HANDLE hMap=::CreateFileMapping(hFile,NULL,PAGE_READONLY,NULL,NULL,NULL);
LPVOID lpBase=::MapViewOfFile(hMap,FILE_MAP_READ,0,0,0);
BITMAPFILEHEADER *pFileHeader;
BITMAPINFO *pInfoHeader;
pFileHeader=(BITMAPFILEHEADER*) lpBase;
if(pFileHeader->bfType!=MAKEWORD('B','M'))
{
::AfxMessageBox(_T("不是bmp文件,请重新选择!^_^"));
::UnmapViewOfFile(lpBase);
::CloseHandle(hMap);
::CloseHandle(hFile);
return;
}
BYTE *pBits=(BYTE *)lpBase+pFileHeader->bfOffBits;
pInfoHeader=(BITMAPINFO *)((BYTE *)lpBase+sizeof(BITMAPFILEHEADER));
m_nHeight=pInfoHeader->bmiHeader.biHeight;
m_nWidth=pInfoHeader->bmiHeader.biWidth;
CClientDC dc(this);
HBITMAP hBitMap=::CreateCompatibleBitmap(dc,m_nWidth,m_nHeight);
::SelectObject(m_hMemDC,hBitMap);
int nRet=::SetDIBitsToDevice(m_hMemDC,
0,
0,
m_nWidth,
m_nHeight,
0,
0,
0,
m_nHeight,
pBits,
pInfoHeader,
DIB_RGB_COLORS);
::InvalidateRect(m_hWnd,NULL,TRUE);
::DeleteObject(hBitMap);
::UnmapViewOfFile(lpBase);
::CloseHandle(hMap);
::CloseHandle(hFile);
}
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14 楼candlelight（candlelight）回复于 2006-05-20 16:46:25 得分 0
保存的应该不是好难
上面用的是内存映射显示bmp文件Top
15 楼renjwjx（神刀）回复于 2006-05-24 14:15:09 得分 0
我这里有个<图像编程>书的光盘,上面的程序不错,不知你要哪一块啊?
说详细点啊,
renjwjx@163.comTop
16 楼Muf（沐枫）回复于 2006-05-24 21:37:39 得分 0
抄书的好多啊。
Image* img = Image::FromFile("c:\\test.bmp");
Graphics* g = Graphics::FromHDC(dc);
g.DrawImage(img, 0, 0);
...
img->Save("C:\\test.pcx");Top
17 楼Muf（沐枫）回复于 2006-05-24 21:37:56 得分 0
Using GDI+Top
