png转bmp源码
BMP是最简单的图形存储格式，在c++里有朋友封装了一个类CDib.
只要把图片使用附件中编辑--粘贴来源找到图画打开另存为选择你想要的格式保存就可以了。也可以右键点击选择打开方式使用图画打开相同的方法。另外photoshop 和office2003的picture manage也有这个功能。
Private Sub mnuconvertBMPtoJPG_Click()
Dim tmpimage As imgdes ' Image descriptors
Dim tmp2image As imgdes
Dim rcode As Long
Dim quality As Long
Dim vbitcount As Long
Dim bdat As BITMAPINFOHEADER ' Reserve space for BMP struct
Dim bmp_fname As String
Dim jpg_fname As String
bmp_fname = "test.bmp"
jpg_fname = "test.jpg"
quality = 75
' Get info on the file we're to load
rcode = bmpinfo(bmp_fname, bdat)
If (rcode <> NO_ERROR) Then
MsgBox "Cannot find file", 0, "Error encountered!"
Exit Sub
End If
vbitcount = bdat.biBitCount
If (vbitcount >= 16) Then ' 16-, 24-, or 32-bit image is loaded into 24-bit buffer
vbitcount = 24
End If
' Allocate space for an image
rcode = allocimage(tmpimage, bdat.biWidth, bdat.biHeight, vbitcount)
If (rcode <> NO_ERROR) Then
MsgBox "Not enough memory", 0, "Error encountered!"
Exit Sub
End If
' Load image
rcode = loadbmp(bmp_fname, tmpimage)
If (rcode <> NO_ERROR) Then
freeimage tmpimage ' Free image on error
MsgBox "Cannot load file", 0, "Error encountered!"
Exit Sub
End If
If (vbitcount = 1) Then ' If we loaded a 1-bit image, convert to 8-bit grayscale
' because jpeg only supports 8-bit grayscale or 24-bit color images
rcode = allocimage(tmp2image, bdat.biWidth, bdat.biHeight, 8)
If (rcode = NO_ERROR) Then
rcode = convert1bitto8bit(tmpimage, tmp2image)
freeimage tmpimage ' Replace 1-bit image with grayscale image
imgdes tmp2image, tmpimage
End If
End If
' Save image
rcode = savejpg(jpg_fname, tmpimage, quality)
freeimage tmpimage
End Sub
........... Add these defines and declarations to your Global mole ...........
' Image descriptor
Type imgdes
ibuff As Long
stx As Long
sty As Long
endx As Long
endy As Long
buffwidth As Long
palette As Long
colors As Long
imgtype As Long
bmh As Long
hBitmap As Long
End Type
Type BITMAPINFOHEADER
biSize As Long
biWidth As Long
biHeight As Long
biPlanes As Integer
biBitCount As Integer
biCompression As Long
biSizeImage As Long
biXPelsPerMeter As Long
biYPelsPerMeter As Long
biClrUsed As Long
biClrImportant As Long
End Type
Declare Function bmpinfo Lib "VIC32.DLL" (ByVal Fname As String, bdat As BITMAPINFOHEADER) As Long
Declare Function allocimage Lib "VIC32.DLL" (image As imgdes, ByVal wid As Long, ByVal leng As Long, ByVal BPPixel As Long) As Long
Declare Function loadbmp Lib "VIC32.DLL" (ByVal Fname As String, desimg As imgdes) As Long
Declare Sub freeimage Lib "VIC32.DLL" (image As imgdes)
Declare Function convert1bitto8bit Lib "VIC32.DLL" (srcimg As imgdes, desimg As imgdes) As Long
Declare Sub imgdes Lib "VIC32.DLL" (srcimg As imgdes, desimg As imgdes)
Declare Function savejpg Lib "VIC32.DLL" (ByVal Fname As String, srcimg As imgdes, ByVal quality As Long) As Long
《图像处理----做一个自己的photoshop》
大部分都是源码，其中有bmp<-->jgep<-->GIF的代码.
B. 如何把png格式图片批量转成bmp图片，需要批量转
批量将图片格式转成bmp的方法，支持png批量转成bmp:
步骤1，打开工具中的软件，点击左边功能区中最上面的“格式转换”按钮。
C. 怎么将png格式转换成bmp格式
最简单的方法就是用【画图】工具打开图片，然后另存为，即可选择bmp格式，
D. 怎么讲png图像转换为bmp
打开ps软件另存为，选择好格式为bmp的就行了。
E. 怎么将png格式图片转成bmp的
图片格式批量转成bmp的方法：
工具软件：优速图片格式转换器
步骤1，打开工具软件，点击左边功能区中最上面的“格式转换”按钮。
F. 如何将.png文件转换为.bmp文件
直接改后缀也可以；或者将图片导入到Fileworks中以BMP格式的图片再到处一遍！
G. png转bmp怎么转
你可以试一下用迅捷图片转换器来操作。它是一款功能丰富、操作简单的转换工具。我们只需将png格式的图片添加进来∞再设置好转换成bmp格式，软件就会自行运作，将其转换为bmp格式。
H. 请问怎么将PNG形式的图像转换成BMP形式
如果是WINXP，就把PNG格式的图象用“画图”打开，然后点“文件”→“另存为”，把“保存类型”改成BMP格式。
如果不是WINXP，那么就把图片用Photoshop之类的画图软件打开，然后再改格式。
I. png图片怎么转换成bmp
图片转换器。或者用电脑系统自带的绘图工具，打开png格式的图片，然后另存为bmp格式就可以了