GDI 如何创建一幅jpg图片，并使用graphics进行操作后保存？
本帖最后由 lsf1012 于 2013-12-26 13:44 编辑如题，整了好久，搞不成。。。
下面用的ScreenCapture是可以的。但BitmapCreateFromFile是不行的。#include <GDIPlus.au3>
#include <ScreenCapture.au3>
Example()
Func Example()
Local $hBitmap,$hImage
; Initialize GDI+ library
_GDIPlus_Startup()
$hBitmap = _ScreenCapture_Capture("")
;$hBitmap=_GDIPlus_BitmapCreateFromFile(@MyDocumentsDir & "\XX.JPG")
$hImage = _GDIPlus_BitmapCreateFromHBITMAP($hBitmap)
$hGraphic = _GDIPlus_ImageGetGraphicsContext($hImage)
_GDIPlus_GraphicsClear($hGraphic,0xFFFF0FFF)
; Save bitmap to file
_GDIPlus_ImageSaveToFile($hImage, @MyDocumentsDir & "\GDIPlus_Image.jpg")
; Clean up resources
_GDIPlus_ImageDispose($hImage)
_WinAPI_DeleteObject($hBitmap)
; Shut down GDI+ library
_GDIPlus_Shutdown()
EndFunc ;==>Example
什么意思?是这个意思吗#include <WinAPIEx.au3>
#include <APIConstants.au3>
#include <GDIPLus.au3>
#include <ScreenCapture.au3>
_ScreenCapture_Capture(@MyDocumentsDir & "\GDIPlus_Image.jpg", 0, 0, 600, 400)
_GDIPlus_Startup()
Local $Image=_GDIPlus_BitmapCreateFromFile(@MyDocumentsDir & "\GDIPlus_Image.jpg")
Local $hImage=_GDIPlus_BitmapCreateFromScan0(400, 300,0, $GDIP_PXF32ARGB)
Local $hGraphics=_GDIPlus_ImageGetGraphicsContext($hImage)
_GDIPlus_GraphicsDrawImageRectRect($hGraphics,$Image,100,50,400,300,0,0,400,300)
_GDIPlus_GraphicsDispose($hGraphics)
_GDIPlus_ImageSaveToFile($hImage,@MyDocumentsDir & "\GDIPlus_Image2.jpg")
_GDIPlus_BitmapDispose($hImage)
_GDIPlus_BitmapDispose($Image)
_GDIPlus_Shutdown()
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