1using?System;
??2using?JJBase.FILE;
??3namespace?JJBase.Image
??4{
??5????/**////?<summary>
??6????///?BMP?的摘要說明。
??7????///?</summary>
??8????public?class?BMP
??9????{
?10????????
?11????????public?BMP()
?12????????{
?13????????????//
?14????????????//TODO:?在此處添加構造函數邏輯
?15????????????//作者：梁俊杰
?16????????????//時間：2005-9-29
?17????????????//功能：分析bmp文件格式
?18????????????//本文參考了林福宗老師的有關BMP文件格式的文章
?19????????????//參考鏈接：http://www.chinahacker.net/article/showarticle.asp?articleid=20809
?20????????????//參考鏈接：http://www.moon-soft.com/program/FORMAT/graphics/Bmp.html
?21????????????//
?22????????}
?23????????/**//*BMP(BitMap-File)圖形文件是Windows采用的圖形文件格式，在Windows環境
?24?????????*?下運行的所有圖象處理軟件都支持BMP圖象文件格式。Windows系統內部各
?25?????????*?圖像繪制操作都是以BMP為基礎的。Windows?3.0以前的BMP圖文件格式與
?26?????????*?顯示設備有關，因此把這種BMP圖象文件格式稱為設備相關位圖DDB
?27?????????*?(device-dependent?BitMap)文件格式。Windows?3.0以后的BMP圖象文件與
?28?????????*?顯示設備無關，因此把這種BMP圖象文件格式稱為設備無關位圖DIB
?29?????????*?(device-independent?BitMap)格式（注：Windows?3.0以后，在系統中仍
?30?????????*?然存在DDB位圖，象BitBlt()這種函數就是基于DDB位圖的，只不過如果你想將
?31?????????*?圖像以BMP格式保存到磁盤文件中時，微軟極力推薦你以DIB格式保存），目的
?32?????????*?是為了讓Windows能夠在任何類型的顯示設備上顯示所存儲的圖象。BMP位圖文件
?33?????????*?默認的文件擴展名是BMP或者bmp（有時它也會以.DIB或.RLE作擴展名）。
?34?????????*?*/
?35????????public?struct?StructBMP
?36????????{
?37????????????public?BMPHeader?Header;
?38????????????public?BMPPalette?Palette;
?39????????????public?BMPData?Data;
?40????????}
?41????????public?struct?BMPHeader
?42????????{
?43????????????/**//*位圖文件可看成由4個部分組成：位圖文件頭(BitMap-file?header)、
?44?????????????*?位圖信息頭(BitMap-information?header)、彩色表(color?table)和
?45?????????????*?定義位圖的字節陣列，
?46?????????????*?*/
?47????????????public?string?Identifier;/**//*2?bytes,識別位圖的類型：?
?48????????????‘BM’?：?Windows?3.1x,?95,?NT,?…?
?49????????????‘BA’?：OS/2?BitMap?Array?
?50????????????‘CI’?：OS/2?Color?Icon?
?51????????????‘CP’?：OS/2?Color?Pointer?
?52????????????‘IC’?：?OS/2?Icon?
?53????????????‘PT’?：OS/2?Pointer?
?54????????????注：因為OS/2系統并沒有被普及開，所以在編程時，你只需判斷第一個標識“BM”就行。
?55????????????*/?
?56????????????public?System.Int32?FileSize;//1?dword,用字節表示的整個文件的大小?
?57????????????public?byte[]?Reserved;//1?dword,保留，必須設置為0?
?58????????????public?System.Int32?BitMapDataOffset;//1?dword,從文件開始到位圖數據開始之間的數據(BitMap?data)之間的偏移量
?59????????????public?System.Int32?BitMapHeaderSize;/**//*1?dword
?60????????????位圖信息頭(BitMap?Info?Header)的長度，用來描述位圖的顏色、壓縮方法等。下面的長度表示：?
?61????????????28h?-?windows?3.1x,?95,?nt,?…
?62????????????0ch?-?os/2?1.x
?63????????????f0h?-?os/2?2.x
?64????????????注：在Windows95、98、2000等操作系統中，位圖信息頭的長度并不一定是28h，因為微軟已經制定出了新的BMP文件格式，其中的信息頭結構變化比較大，長度加長。所以最好不要直接使用常數28h，而是應該從具體的文件中讀取這個值。這樣才能確保程序的兼容性。?
?65?????????????*/
?66????????????public?System.Int32?Width;//1?dword,位圖的寬度，以象素為單位
?67????????????public?System.Int32?Height;//1?dword,位圖的高度，以象素為單位?
?68????????????public?System.Int16?Planes;//1?word,位圖的位面數（注：該值將總是1）?
?69????????????public?System.Int16?BitsPerPixel;
?70????????????/**//*1?word
?71????????????每個象素的位數?
?72????????????1?-?單色位圖（實際上可有兩種顏色，缺省情況下是黑色和白色。你可以自己定義這兩種顏色）?
?73????????????4?-?16?色位圖?
?74????????????8?-?256?色位圖?
?75????????????16?-?16bit?高彩色位圖?
?76????????????24?-?24bit?真彩色位圖?
?77????????????32?-?32bit?增強型真彩色位圖?
?78????????????*/?
?79????????????public?System.Int32?Compression;
?80????????????/**//*1?dword
?81????????????壓縮說明：?
?82????????????0?-?不壓縮?(使用BI_RGB表示)?
?83????????????1?-?RLE?8-使用8位RLE壓縮方式(用BI_RLE8表示)?
?84????????????2?-?RLE?4-使用4位RLE壓縮方式(用BI_RLE4表示)?
?85????????????3?-?Bitfields-位域存放方式(用BI_BITFIELDS表示)?
?86????????????*/
?87????????????public?System.Int32?BitMapDataSize;//1?dword,用字節數表示的位圖數據的大小。該數必須是4的倍數
?88????????????public?System.Int32?HResolution;//1?dword,用象素/米表示的水平分辨率
?89????????????public?System.Int32?VResolution;//1?dword,用象素/米表示的垂直分辨率
?90????????????public?System.Int32?Colors;//1?dword,位圖使用的顏色數。如8-比特/象素表示為100h或者?256.?
?91????????????public?System.Int32?ImportantColors;
?92????????????/**//*1?dword,指定重要的顏色數。當該域的值等于顏色數時（或者等于0時），表示所有顏色都一樣重要?
?93????????????*/
?94????????}
?95????????public?struct?BMPPalette
?96????????{
?97????????????public?byte[]?Palette;//new?byte[8192];//bmp規范沒有規定調色板最大81926字節，此處可以根據程序需要調節
?98????????????/**//*調色板數據根據BMP版本的不同而不同PaletteN?*?4?byte調色板規范。
?99????????????對于調色板中的每個表項，這4個字節用下述方法來描述RGB的值：?1字節用于藍色分量?
100????????????1字節用于綠色分量?
101????????????1字節用于紅色分量?
102????????????1字節用于填充符(設置為0)?
103????????????*/
104????????}
105????????public?struct?BMPData
106????????{
107????????????public?byte[]?BitMapData;//=new?byte[1024000];//bmp規范沒有規定bmp數據最多為1024000,此處可以根據需要調整
108????????????/**//*
109????????????圖象數據根據BMP版本及調色板尺寸的不同而不同BitMap?Dataxxx?bytes該域的大小取決
110????????????于壓縮方法及圖像的尺寸和圖像的位深度，它包含所有的位圖數據字節，這些數據可能是
111????????????彩色調色板的索引號，也可能是實際的RGB值，這將根據圖像信息頭中的位深度值來決定。
112????????????*/
113????????}
114????????public?void?ProcessBMP(ref?StructBMP?sbmp,byte[]?bytesFile)
115????????{
116????????????byte[]?word1=new?byte[2];
117????????????byte[]?word2=new?byte[4];
118????????????System.Int32?result;
119????????????string?str="";
120????????????word1[0]=bytesFile[0];
121????????????word1[1]=bytesFile[1];
122????????????str=FromBytesToString(word1);
123????????????sbmp.Header.Identifier=str;
124????????????word2[0]=bytesFile[2];
125????????????word2[1]=bytesFile[3];
126????????????word2[2]=bytesFile[4];
127????????????word2[3]=bytesFile[5];
128????????????result=this.FromBytesToInt32(word2);
129????????????sbmp.Header.FileSize=result;
130????????????word2[0]=bytesFile[10];
131????????????word2[1]=bytesFile[11];
132????????????word2[2]=bytesFile[12];
133????????????word2[3]=bytesFile[13];
134????????????result=this.FromBytesToInt32(word2);
135????????????sbmp.Header.BitMapDataOffset=result;
136????????????word2[0]=bytesFile[14];
137????????????word2[1]=bytesFile[15];
138????????????word2[2]=bytesFile[16];
139????????????word2[3]=bytesFile[17];
140????????????result=this.FromBytesToInt32(word2);
141????????????sbmp.Header.BitMapHeaderSize=result;
142????????????word2[0]=bytesFile[18];
143????????????word2[1]=bytesFile[19];
144????????????word2[2]=bytesFile[20];
145????????????word2[3]=bytesFile[21];
146????????????sbmp.Header.Width=result;
147????????????word2[0]=bytesFile[22];
148????????????word2[1]=bytesFile[23];
149????????????word2[2]=bytesFile[24];
150????????????word2[3]=bytesFile[25];
151????????????result=this.FromBytesToInt32(word2);
152????????????sbmp.Header.Height?=result;
153????????????word1[0]=bytesFile[26];
154????????????word1[1]=bytesFile[27];
155????????????sbmp.Header.Planes=(System.Int16)FromBytesToInt32(word1);
156????????????word1[0]=bytesFile[28];
157????????????word1[1]=bytesFile[29];
158????????????sbmp.Header.BitsPerPixel=(System.Int16)FromBytesToInt32(word1);
159????????????word2[0]=bytesFile[30];
160????????????word2[1]=bytesFile[31];
161????????????word2[2]=bytesFile[32];
162????????????word2[3]=bytesFile[33];
163????????????result=this.FromBytesToInt32(word2);
164????????????sbmp.Header.Compression?=result;
165????????????word2[0]=bytesFile[34];
166????????????word2[1]=bytesFile[35];
167????????????word2[2]=bytesFile[36];
168????????????word2[3]=bytesFile[37];
169????????????result=this.FromBytesToInt32(word2);
170????????????sbmp.Header.BitMapDataSize??=result;
171????????????word2[0]=bytesFile[38];
172????????????word2[1]=bytesFile[39];
173????????????word2[2]=bytesFile[40];
174????????????word2[3]=bytesFile[41];
175????????????result=this.FromBytesToInt32(word2);
176????????????sbmp.Header.HResolution??=result;
177????????????word2[0]=bytesFile[42];
178????????????word2[1]=bytesFile[43];
179????????????word2[2]=bytesFile[44];
180????????????word2[3]=bytesFile[45];
181????????????result=this.FromBytesToInt32(word2);
182????????????sbmp.Header.VResolution?=result;
183????????????word2[0]=bytesFile[46];
184????????????word2[1]=bytesFile[47];
185????????????word2[2]=bytesFile[48];
186????????????word2[3]=bytesFile[49];
187????????????result=this.FromBytesToInt32(word2);
188????????????sbmp.Header.Colors?=result;
189????????????word2[0]=bytesFile[50];
190????????????word2[1]=bytesFile[51];
191????????????word2[2]=bytesFile[52];
192????????????word2[3]=bytesFile[53];
193????????????result=this.FromBytesToInt32(word2);
194????????????sbmp.Header.ImportantColors?=result;
195????????????//計算位圖數據的開始位置
196????????????//sbmp.Header.BitMapDataSize是位圖數據的大小，sbmp.Header.FileSize是整個文件的大小
197????????????//sbmp.Header.FileSize－sbmp.Header.BitMapDataSize－1就是位圖數據的開始位置
198????????????//0x36到sbmp.Header.FileSize－sbmp.Header.BitMapDataSize－2就是調色板數據
199????????????result=sbmp.Header.FileSize-sbmp.Header.BitMapDataSize;
200????????????int?j=0;
201????????????byte[]?b=new?byte[sbmp.Header.BitMapDataSize];
202????????????for(int?i=result;i<sbmp.Header.FileSize;i++)
203????????????{
204????????????????b[j]=bytesFile[i];j++;
205????????????}
206????????????sbmp.Data.BitMapData=b;
207????????????j=0;
208????????????b=new?byte[result-sbmp.Header.BitMapDataOffset];
209????????????for(int?i=sbmp.Header.BitMapDataOffset;i<result;i++)
210????????????{
211????????????????b[j]=bytesFile[i];j++;
212????????????}
213????????????sbmp.Palette.Palette=b;
214????????}
215????????public?void?ProcessBMP(ref?StructBMP?sbmp,string?File)
216????????{
217????????????//先讀取文件成字節數組，統一由ProcessBMP(StructBMP?sbmp,byte[]?bytesFile)處理
218????????????JJBase.FILE.ReadAndWrite??f=new?ReadAndWrite();
219????????????byte[]?result=f.ReadBytesFromFile(File);
220????????????ProcessBMP(ref?sbmp,result);
221????????}
222????????private?System.Int32?FromBytesToInt32(byte[]?b)
223????????{
224????????????System.Int32?result=0;
225????????????System.Int32?t=0;
226????????????for(int?i=b.Length-1;i>=0;i--)
227????????????{
228????????????????
229????????????????if((int)b[i]!=0)
230????????????????{
231????????????????????t=(int)Math.Pow(256,i);
232????????????????????result+=(int)b[i]*t;
233????????????????}
234????????????????
235????????????}
236????????????return?result;
237????????}
238????????private?string?FromBytesToString(byte[]?b)
239????????{
240????????????string?result="";
241????????????for(int?i=0;i<b.Length;i++)
242????????????{
243????????????????result+=Convert.ToChar((int)(b[i])).ToString();
244????????????}
245????????????return?result;
246????????}
247????????
248????}
249}

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