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'*************************************************************************
'** 函 数 名 : funSaveImgToFile
'** 输 入 : pic(StdPicture) - 图象句柄
'** : FileName(String) - 保存路径
'** : Quality(Byte) - JPG图象质量
'** : TIFF_ColorDepth(Long) - TTF格式的颜色深度
'** : TIFF_Compression(Long) - TTF格式的压缩比
'** 输 出 : 成功与否
'** 功能描述 : 把图象保存为JPG、TIFF、PNG、GIF、BMP格式
'*************************************************************************
Public Function funSaveImgToFile(ByVal pict As StdPicture, ByVal FileName As String, ByVal PicType As String, _
Optional ByVal Quality As Byte = 100, _
Optional ByVal TIFF_ColorDepth As Long = 24, _
Optional ByVal TIFF_Compression As Long = 6) As Boolean
Dim tSI As GdiplusStartupInput
Dim lRes As Long
Dim lGDIP As Long
Dim lBitmap As Long
Dim aEncParams() As Byte
' 初始化 GDI+
tSI.GdiplusVersion = 1
lRes = GdiplusStartup(lGDIP, tSI, 0)
If lRes = 0 Then ' 从句柄创建 GDI+ 图像
lRes = GdipCreateBitmapFromHBITMAP(pict.handle, 0, lBitmap)
If lRes = 0 Then
Dim tJpgEncoder As GUID
Dim tParams As EncoderParameters '初始化解码器的GUID标识
Select Case LCase(PicType) '防止前面写文件格式是把小写搞成大写,如果是就转为小写字
Case "jpg"
CLSIDFromString StrPtr("{557CF401-1A04-11D3-9A73-0000F81EF32E}"), tJpgEncoder
tParams.Count = 1 ' 设置解码器参数
With tParams.Parameter ' Quality
CLSIDFromString StrPtr("{1D5BE4B5-FA4A-452D-9CDD-5DB35105E7EB}"), .GUID ' 得到Quality参数的GUID标识
.NumberOfValues = 1
.type = 4
.Value = VarPtr(Quality)
End With
ReDim aEncParams(1 To Len(tParams))
Call CopyMemory(aEncParams(1), tParams, Len(tParams))
Case "png"
CLSIDFromString StrPtr("{557CF406-1A04-11D3-9A73-0000F81EF32E}"), tJpgEncoder
ReDim aEncParams(1 To Len(tParams))
Case "gif"
CLSIDFromString StrPtr("{557CF402-1A04-11D3-9A73-0000F81EF32E}"), tJpgEncoder
ReDim aEncParams(1 To Len(tParams))
Case "tiff"
CLSIDFromString StrPtr("{557CF405-1A04-11D3-9A73-0000F81EF32E}"), tJpgEncoder
tParams.Count = 2
ReDim aEncParams(1 To Len(tParams) + Len(tParams.Parameter))
With tParams.Parameter
.NumberOfValues = 1
.type = 4
CLSIDFromString StrPtr("{E09D739D-CCD4-44EE-8EBA-3FBF8BE4FC58}"), .GUID ' 得到ColorDepth参数的GUID标识
.Value = VarPtr(TIFF_Compression)
End With
Call CopyMemory(aEncParams(1), tParams, Len(tParams))
With tParams.Parameter
.NumberOfValues = 1
.type = 4
CLSIDFromString StrPtr("{66087055-AD66-4C7C-9A18-38A2310B8337}"), .GUID ' 得到Compression参数的GUID标识
.Value = VarPtr(TIFF_ColorDepth)
End With
Call CopyMemory(aEncParams(Len(tParams) + 1), tParams.Parameter, Len(tParams.Parameter))
End Select
lRes = GdipSaveImageToFile(lBitmap, StrPtr(FileName), tJpgEncoder, aEncParams(1)) '保存图像
GdipDisposeImage lBitmap ' 销毁GDI+图像
End If
GdiplusShutdown lGDIP '销毁 GDI+
End If
Erase aEncParams
If lRes Then
funSaveImgToFile = False
Else
funSaveImgToFile = True
End If
Exit Function
End Function
#include <math.h>
#include <string.h>
#include <stdio.h>
#include <windows.h>
#include <gdiplus.h>
#pragma comment(lib, "gdiplus.lib")
using namespace Gdiplus;
wchar_t formats[5][11]={
L"image/bmp",
L"image/jpeg",
L"image/gif",
L"image/tiff",
L"image/png",
};
wchar_t exts[5][5]={
L".bmp",
L".jpg",
L".gif",
L".tif",
L".png",
};
int GetEncoderClsid(const WCHAR* format, CLSID* pClsid) {
UINT num = 0; // number of image encoders
UINT size = 0; // size of the image encoder array in bytes
ImageCodecInfo* pImageCodecInfo = NULL;
GetImageEncodersSize(&num, &size);
if(size == 0) return -1; // Failure
pImageCodecInfo = (ImageCodecInfo*)(malloc(size));
if(pImageCodecInfo == NULL) return -1; // Failure
GetImageEncoders(num, size, pImageCodecInfo);
for (UINT j = 0; j < num; ++j) {
if ( wcscmp(pImageCodecInfo[j].MimeType, format) == 0 ) {
*pClsid = pImageCodecInfo[j].Clsid;
free(pImageCodecInfo);
return j; // Success
}
}
free(pImageCodecInfo);
return -1; // Failure
}
int wmain(int argc,wchar_t *argv[]) {
int r=1;
if (argc<4) {
USAGE:
wprintf(L"%s srcimg.{bmp|jpg|gif|tif|png|wmf|emf|ico} desimg.{bmp|jpg|gif|tif|png} angle\n",argv[0]);
return r;
}
int i;
for (i=0;i<5;i++) {
if (0==_wcsicmp(argv[1]+wcslen(argv[1])-4,exts[i])) break;
}
if (i>=5) goto USAGE;
for (i=0;i<5;i++) {
if (0==_wcsicmp(argv[2]+wcslen(argv[2])-4,exts[i])) break;
}
if (i>=5) goto USAGE;
GdiplusStartupInput gdiplusstartupinput;
ULONG_PTR gdiplustoken;
GdiplusStartup(&gdiplustoken, &gdiplusstartupinput, NULL);
{
Image img(argv[1]);
if (Ok==img.GetLastStatus()) {
UINT height = img.GetHeight();
UINT width = img.GetWidth();
REAL angle;
if (1==swscanf_s(argv[3],L"%f",&angle)) {
REAL size;
size=(REAL)sqrt(1.0*width*width+1.0*height*height);
Matrix mat;
mat.Translate(size / -2.0f, size / -2.0f);
mat.Rotate(-angle, MatrixOrderAppend);
mat.Translate(size / 2.0f, size / 2.0f, MatrixOrderAppend);
PointF pfTL((size-width)/2.0f ,(size-height)/2.0f );
PointF pfTR((size-width)/2.0f+width,(size-height)/2.0f );
PointF pfBL((size-width)/2.0f ,(size-height)/2.0f+height);
PointF pfBR((size-width)/2.0f+width,(size-height)/2.0f+height);
Graphics tgp(&img);
Bitmap bmp((UINT)size,(UINT)size,&tgp);//Let bmp Resolution equal to img Resolution
Graphics gp(&bmp);
gp.SetTransform(&mat);
gp.DrawImage(&img,pfTL);
REAL xmin,ymin,xmax,ymax,x,y,rw,rh;
mat.TransformPoints(&pfTL);
xmin=xmax=pfTL.X;
ymin=ymax=pfTL.Y;
mat.TransformPoints(&pfTR);
if (xmin>pfTR.X) xmin=pfTR.X;
if (xmax<pfTR.X) xmax=pfTR.X;
if (ymin>pfTR.Y) ymin=pfTR.Y;
if (ymax<pfTR.Y) ymax=pfTR.Y;
mat.TransformPoints(&pfBL);
if (xmin>pfBL.X) xmin=pfBL.X;
if (xmax<pfBL.X) xmax=pfBL.X;
if (ymin>pfBL.Y) ymin=pfBL.Y;
if (ymax<pfBL.Y) ymax=pfBL.Y;
mat.TransformPoints(&pfBR);
if (xmin>pfBR.X) xmin=pfBR.X;
if (xmax<pfBR.X) xmax=pfBR.X;
if (ymin>pfBR.Y) ymin=pfBR.Y;
if (ymax<pfBR.Y) ymax=pfBR.Y;
x=xmin;
y=ymin;
rw=xmax-x;
rh=ymax-y;
Bitmap* clone;
clone = bmp.Clone(x,y,rw,rh,PixelFormat24bppRGB);//bmp.GetPixelFormat()
CLSID encoderClsid;
if (0<=GetEncoderClsid(formats[i],&encoderClsid)) {
if (Ok==clone->Save(argv[2],&encoderClsid)) {
wprintf(L"OK to %s %s %s %s\n",argv[0],argv[1],argv[2],argv[3]);
r=0;
} else {
wprintf(L"Error to save %s\n",argv[2]);
r=4;
}
} else {
wprintf(L"Error to GetEncoderClsid(%s,...)\n",formats[i]);
r=3;
}
delete clone;
} else {
wprintf(L"Error to get angle %s\n",argv[3]);
r=2;
}
} else {
wprintf(L"Error to load %s\n",argv[1]);
r=5;
}
}
GdiplusShutdown(gdiplustoken);
return r;
}