[已解决]如何使用GDI画图？

mbdnmt

如何使用GDI画图？ 有没有带源码的例子？

帮助文档里关于GDI画图有这么个例子(见代码1)，但好像是还使用了一个GUIRegisterMsg， 不使用这个是否可以正常使用GDI来画图？

尝试[代码2]为何不成功？

========= [代码2] ========

$hGUI = GUICreate("Toolbar", 400, 300)

_GDIPlus_Startup()

;---> Create an image object based on a file,   Return Success - Handle to the new image object
$hImage = _GDIPlus_ImageLoadFromFile("authimg.png")
ConsoleWrite("$hImage is " & $hImage & @CRLF)

;---> Create a Graphics object from a window handle,   Success - Handle to a Graphics object
$hGraphic = _GDIPlus_GraphicsCreateFromHWND($hGUI)
ConsoleWrite("$hGraphic is " & $hGraphic & @CRLF)

;--->Draw an Image object,    Success - True
$sRtn = _GDIPlus_GraphicsDrawImage($hGraphic, $hImage, 20, 20)
ConsoleWrite("$sRtn is " & $sRtn & @CRLF)

;---> Creates a Bitmap object based on a Graphics object, a width, and a height,   Success - Handle to a Bitmap object
$sRtn = _GDIPlus_BitmapCreateFromGraphics(50, 50, $hGraphic)
ConsoleWrite("$sRtn is " & $sRtn & @CRLF)

GUISetState(@SW_SHOW, $hGUI)
Sleep(6000)

========= [代码1] ========

#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <GDIPlus.au3>
#include <WinAPI.au3>

Global $hGUI, $hImage, $hGraphic, $hImage1

; 创建 GUI
$hGUI = GUICreate("显示 PNG 图片", 250, 250)

; 加载 PNG 图像
_GDIPlus_Startup()
$hImage = _GDIPlus_ImageLoadFromFile("authimg.png")
$hGraphic = _GDIPlus_GraphicsCreateFromHWND($hGUI)

GUIRegisterMsg($WM_PAINT, "MY_WM_PAINT")
GUISetState()

; 循环到用户退出
Do
Until GUIGetMsg() = $GUI_EVENT_CLOSE

; 清理资源
_GDIPlus_GraphicsDispose($hGraphic)
_GDIPlus_ImageDispose($hImage)
_GDIPlus_Shutdown()

; 绘制 PNG 图像
Func MY_WM_PAINT($hWnd, $msg, $wParam, $lParam)
    #forceref $hWnd, $Msg, $wParam, $lParam
    _WinAPI_RedrawWindow($hGUI, 0, 0, $RDW_UPDATENOW)
    _GDIPlus_GraphicsDrawImage($hGraphic, $hImage, 0, 0)
    _WinAPI_RedrawWindow($hGUI, 0, 0, $RDW_VALIDATE)
    Return $GUI_RUNDEFMSG
EndFunc   ;==>MY_WM_PAINT

afan

[代码2] ：第21行移至第2行
[代码1] ：GUIRegisterMsg($WM_PAINT, "MY_WM_PAINT") 窗口需要重绘时通知

mbdnmt

回复 2# afan

多谢A版~