Sets the colors to be interpolated for a linear gradient brush and their corresponding blend positions
#include <GDIPlus.au3>
_GDIPlus_LineBrushSetPresetBlend ( $hLineGradientBrush, $aInterpolations )
| $hLineGradientBrush | Pointer to a LinearGradientBrush object |
| $aInterpolations | Array of blend colors and blend positions: [0][0] - Number of blend colors and blend positions, must be at least 2 [1][0] - Color 1 [1][1] - Position 1 [2][0] - Color 2 [2][1] - Position 2 [n][0] - Color n [n][1] - Position n |
| Success: | True. |
| Failure: | False and sets the @error flag to non-zero, @extended may contain GPSTATUS error code ($GPIP_ERR* see GPIPlusConstants.au3). |
Search GdipSetLinePresetBlend in MSDN Library.
#include <GDIPlus.au3>
#include <GUIConstantsEx.au3>
Example()
Func Example()
_GDIPlus_Startup() ;initialize GDI+
Local Const $iWidth = 600, $iHeight = 300, $iBgColor = 0x303030 ;$iBgColor format RRGGBB
Local $hGUI = GUICreate("GDI+ Example (" & @ScriptName & ")", $iWidth, $iHeight) ;create a test GUI
GUISetBkColor($iBgColor, $hGUI) ;set GUI background color
GUISetState(@SW_SHOW)
Local $hGraphics = _GDIPlus_GraphicsCreateFromHWND($hGUI) ;create a graphics object from a window handle
_GDIPlus_GraphicsSetSmoothingMode($hGraphics, $GDIP_SMOOTHINGMODE_HIGHQUALITY) ;sets the graphics object rendering quality (antialiasing)
Local $hBrush = _GDIPlus_LineBrushCreate(0, 0, 580, 280, 0, 0, 1) ;create line brush
Local $aInterpolations[5][2] ;define the interpolated colors and positions
$aInterpolations[0][0] = 4
$aInterpolations[1][0] = 0xFFFF0000 ;Red
$aInterpolations[1][1] = 0 ;0% from the left
$aInterpolations[2][0] = 0xFF00FF00 ;Green
$aInterpolations[2][1] = 0.3 ;To 30% from the left
$aInterpolations[3][0] = 0xFF0000FF ;Blue
$aInterpolations[3][1] = 0.7 ;To 70% from the left
$aInterpolations[4][0] = 0xFFFFFF00 ;Yellow
$aInterpolations[4][1] = 1 ;To 100% from the left
_GDIPlus_LineBrushSetPresetBlend($hBrush, $aInterpolations) ;set the linear gradient brush colors and position
_GDIPlus_GraphicsFillRect($hGraphics, 10, 10, 580, 280, $hBrush) ;draw bitmap to screen
Do
Until GUIGetMsg() = $GUI_EVENT_CLOSE
;cleanup GDI+ resources
_GDIPlus_BrushDispose($hBrush)
_GDIPlus_GraphicsDispose($hGraphics)
_GDIPlus_Shutdown()
GUIDelete($hGUI)
EndFunc ;==>Example