Creates and initializes a scaling color matrix
#include <GDIPlus.au3>
_GDIPlus_ColorMatrixCreateScale ( $fRed, $fGreen, $fBlue [, $fAlpha = 1] )
| $fRed | Red component scaling factor |
| $fGreen | Green component scaling factor |
| $fBlue | Blue component scaling factor |
| $fAlpha | [optional] Alpha component scaling factor |
A scaling color matrix is used to multiply components of a color by multiplier factors.
Search ColorMatrix in MSDN Library.
#include <GDIPlus.au3>
#include <GUIConstantsEx.au3>
#include <ScreenCapture.au3>
#include <WinAPIHObj.au3>
Example()
Func Example()
_GDIPlus_Startup() ;initialize GDI+
Local Const $iWidth = 600, $iHeight = 600
Local $hGUI = GUICreate("GDI+ Example (" & @ScriptName & ")", $iWidth, $iHeight) ;create a test GUI
GUISetState(@SW_SHOW)
Local $hGraphics = _GDIPlus_GraphicsCreateFromHWND($hGUI) ;create a graphics object from a window handle
Local $hIA = _GDIPlus_ImageAttributesCreate() ;create an ImageAttribute object
Local $tColorMatrix = _GDIPlus_ColorMatrixCreateScale(0.5, 0.5, 0.5) ;create the scale factor color matrix for RGB color channel
_GDIPlus_ImageAttributesSetColorMatrix($hIA, 0, True, $tColorMatrix) ;decrease each color (RGB) level by 50% (darken)
Local $hHBmp = _ScreenCapture_Capture("", 0, 0, $iWidth, $iHeight) ;create a GDI bitmap by capturing an area on desktop
Local $hBitmap = _GDIPlus_BitmapCreateFromHBITMAP($hHBmp) ;convert GDI to GDI+ bitmap
_WinAPI_DeleteObject($hHBmp) ;release GDI bitmap resource because not needed anymore
_GDIPlus_GraphicsDrawImageRectRect($hGraphics, $hBitmap, 0, 0, $iWidth, $iHeight, 0, 0, $iWidth, $iHeight, $hIA) ;draw the bitmap while applying the color adjustment
Do
Until GUIGetMsg() = $GUI_EVENT_CLOSE
;cleanup GDI+ resources
_GDIPlus_ImageAttributesDispose($hIA)
_GDIPlus_GraphicsDispose($hGraphics)
_GDIPlus_BitmapDispose($hBitmap)
_GDIPlus_Shutdown()
GUIDelete($hGUI)
EndFunc ;==>Example