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_GDIPlus_PicSetGradient()

taz742

By taz742
in AutoIt Example Scripts

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taz742 Seeker

taz742

Posted
Posted (edited)

I've play with GDIPlus User fonction and finally I wrote this one from other.

It fill a Pic Control with a gradient color linear or not.

Capture:

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#include <GDIPlus.au3>
#include <GuiConstants.au3>
#include <WindowsConstants.au3>

$hGui = GUICreate("Pic Gradients", 670, 450)
GUISetState()

Global $picW = 100, $picH = 100

Dim $aBlends3[3] = [0xFFFFFFFF, 0xFFAA0000, 0xFF000000];3 colors gradient set
Dim $aBlends4[4] = [0xFF00FF00, 0xFFFFFF00, 0xFF00FFFF, 0xFFFF0000];4 colors gradient set
Dim $aPositions3[3] = [0, 0.8, 1];custom positions array for 3 colors
Dim $aPositions4[4] = [0, 0.2, 0.4, 1]; custom positions array for 4 colors

$Pic1 = GUICtrlCreatePic("", 10+($picW+10)*0, 10+($picH+10)*0, $picW, $picH)
$Pic2 = GUICtrlCreatePic("", 10+($picW+10)*1, 10+($picH+10)*0, $picW, $picH)
$Pic3 = GUICtrlCreatePic("", 10+($picW+10)*0, 10+($picH+10)*1, $picW, $picH)
$Pic4 = GUICtrlCreatePic("", 10+($picW+10)*1, 10+($picH+10)*1, $picW, $picH)
_GDIPlus_PicSetGradient($Pic1, $aBlends3, 0x00000000);Linear Gradient Horizontal 3 colors
_GDIPlus_PicSetGradient($Pic2, $aBlends3, 0x00000001);Linear Gradient Vertical 3 colors
_GDIPlus_PicSetGradient($Pic3, $aBlends3, 0x00000002);Linear Gradient ForwardDiagonal 3 colors
_GDIPlus_PicSetGradient($Pic4, $aBlends3, 0x00000003);Linear Gradient BackwardDiagonal 3 colors

$Pic5 = GUICtrlCreatePic("", 10+($picW+10)*3, 10+($picH+10)*0, $picW, $picH)
$Pic6 = GUICtrlCreatePic("", 10+($picW+10)*4, 10+($picH+10)*0, $picW, $picH)
$Pic7 = GUICtrlCreatePic("", 10+($picW+10)*3, 10+($picH+10)*1, $picW, $picH)
$Pic8 = GUICtrlCreatePic("", 10+($picW+10)*4, 10+($picH+10)*1, $picW, $picH)
_GDIPlus_PicSetGradient($Pic5, $aBlends3, 0x00000000, $aPositions3);Custom Gradient Horizontal 3 colors
_GDIPlus_PicSetGradient($Pic6, $aBlends3, 0x00000001, $aPositions3);Custom Gradient Vertical 3 colors
_GDIPlus_PicSetGradient($Pic7, $aBlends3, 0x00000002, $aPositions3);Custom Gradient ForwardDiagonal 3 colors
_GDIPlus_PicSetGradient($Pic8, $aBlends3, 0x00000003, $aPositions3);Custom Gradient BackwardDiagonal 3 colors

$Pic9 = GUICtrlCreatePic("", 10+($picW+10)*0, 10+($picH+10)*2, $picW, $picH)
$Pic10 = GUICtrlCreatePic("", 10+($picW+10)*1, 10+($picH+10)*2, $picW, $picH)
$Pic11 = GUICtrlCreatePic("", 10+($picW+10)*0, 10+($picH+10)*3, $picW, $picH)
$Pic12 = GUICtrlCreatePic("", 10+($picW+10)*1, 10+($picH+10)*3, $picW, $picH)
_GDIPlus_PicSetGradient($Pic9, $aBlends4, 0x00000000);Linear Gradient Horizontal 4 colors
_GDIPlus_PicSetGradient($Pic10, $aBlends4, 0x00000001);Linear Gradient Vertical 4 colors
_GDIPlus_PicSetGradient($Pic11, $aBlends4, 0x00000002);Linear Gradient ForwardDiagonal 4 colors
_GDIPlus_PicSetGradient($Pic12, $aBlends4, 0x00000003);Linear Gradient BackwardDiagonal 4 colors

$Pic13 = GUICtrlCreatePic("", 10+($picW+10)*3, 10+($picH+10)*2, $picW, $picH)
$Pic14 = GUICtrlCreatePic("", 10+($picW+10)*4, 10+($picH+10)*2, $picW, $picH)
$Pic15 = GUICtrlCreatePic("", 10+($picW+10)*3, 10+($picH+10)*3, $picW, $picH)
$Pic16 = GUICtrlCreatePic("", 10+($picW+10)*4, 10+($picH+10)*3, $picW, $picH)
_GDIPlus_PicSetGradient($Pic13, $aBlends4, 0x00000000, $aPositions4);Custom Gradient Horizontal 4 colors
_GDIPlus_PicSetGradient($Pic14, $aBlends4, 0x00000001, $aPositions4);Custom Gradient Vertical 4 colors
_GDIPlus_PicSetGradient($Pic15, $aBlends4, 0x00000002, $aPositions4);Custom Gradient ForwardDiagonal 4 colors
_GDIPlus_PicSetGradient($Pic16, $aBlends4, 0x00000003, $aPositions4);Custom Gradient BackwardDiagonal 4 colors
Do
    Sleep(25)
Until GUIGetMsg() = $GUI_EVENT_CLOSE

;==== _GDIPlus_PicSetGradient === Taz742 function
; Description  - Fill a Pic control with linear or custom gradient from a set of boundary points and boundary colors.
; ===========
; $cID         - Pic ControlID
;
; $aBlend      - Pointer to an array of ARGB colors that specify the colors to be interpolated
;                for this linear gradient brush. A color of a given index in the blend array
;                corresponds to the blend position of that same index in the positions array.
;
; $iDirection  - {Opt} GradientHorizontal       = 0x00000000 <Default>
;                      GradientVertical         = 0x00000001
;                      GradientForwardDiagonal  = 0x00000002
;                      GradientBackwardDiagonal = 0x00000003
;
; $aPositions  - {Opt} If non-array or non specified, a linear array will be internaly created.
;                Pointer to an array of real numbers that specify blend factors' positions. Each number in the array
;                indicates a percentage of the distance between the starting boundary and the ending boundary
;                and is in the range from 0.0 through 1.0, where 0.0 indicates the starting boundary of the
;                gradient and 1.0 indicates the ending boundary. There must be at least two positions
;                specified: the first position, which is always 0.0, and the last position, which is always
;                1.0. Otherwise, the behavior is undefined. A blend position between 0.0 and 1.0 indicates a
;                line, parallel to the boundary lines, that is a certain fraction of the distance from the
;                starting boundary to the ending boundary. For example, a blend position of 0.7 indicates
;                the line that is 70 percent of the distance from the starting boundary to the ending boundary.
;
; Requirement:  #include <GDIPlus.au3>
;=============  _GDIPlus_CreateLineBrushFromRect()
;               _GDIPlus_SetLinePresetBlend()
;=================================================
Func _GDIPlus_PicSetGradient($cID, $aBlends, $iDirection = 0x00000000, $aPositions = "")
    If Not IsArray($aBlends) Then Dim $aBlends[2] = [0xFFFFFFFF, 0xFF000000]
    If Not IsArray($aPositions) Then
        Local $BlendsDim = UBound($aBlends)
        Dim $aPositions[$BlendsDim]
        For $i=0 To $BlendsDim -1
            $aPositions[$i] = 1/($BlendsDim-1)*$i
        Next
    EndIf
    Local Const $STM_SETIMAGE = 0x0172
    Local Const $IMAGE_BITMAP = 0
    Local $hWnd, $cID_Pos, $hBitmap, $hImage, $hGraphic, $hBrushLin, $hbmp, $aBmp
    $hWnd = GUICtrlGetHandle($cID)
    $cID_Pos = ControlGetPos("", "", $hWnd)
    $hBitmap = _WinAPI_CreateBitmap($cID_Pos[2], $cID_Pos[3], 1, 32)
    _GDIPlus_Startup()
    $hImage = _GDIPlus_BitmapCreateFromHBITMAP($hBitmap)
    $hGraphic = _GDIPlus_ImageGetGraphicsContext($hImage)
    $hBrushLin = _GDIPlus_CreateLineBrushFromRect(0, 0, $cID_Pos[2], $cID_Pos[3], $aPositions, $aPositions, $aBlends[0], $aBlends[UBound($aBlends)-1], $iDirection)
    _GDIPlus_SetLinePresetBlend($hBrushLin, $aBlends, $aPositions)
    _GDIPlus_GraphicsFillRect($hGraphic, 0, 0, $cID_Pos[2], $cID_Pos[3], $hBrushLin)
    $hbmp = _GDIPlus_BitmapCreateHBITMAPFromBitmap($hImage)
    $aBmp = DllCall("user32.dll", "hwnd", "SendMessage", "hwnd", $hWnd, "int", $STM_SETIMAGE, "int", $IMAGE_BITMAP, "int", $hbmp)
    If $aBmp[0] <> 0 Then _WinAPI_DeleteObject($aBmp[0])
    _GDIPlus_ImageDispose($hImage)
    _GDIPlus_BrushDispose($hBrushLin)
    _GDIPlus_GraphicsDispose($hGraphic)
    _WinAPI_DeleteObject($hbmp)
    _WinAPI_DeleteObject($hBitmap)
    _GDIPlus_Shutdown()
EndFunc   ;==>_GDIPlus_PicSetGradient

;====_GDIPlus_CreateLineBrushFromRect === Malkey's function
;Description - Creates a LinearGradientBrush object from a set of boundary points and boundary colors.
; $aFactors - If non-array, default array will be used.
;           Pointer to an array of real numbers that specify blend factors. Each number in the array
;           specifies a percentage of the ending color and should be in the range from 0.0 through 1.0.
;$aPositions - If non-array, default array will be used.
;            Pointer to an array of real numbers that specify blend factors' positions. Each number in the array
;            indicates a percentage of the distance between the starting boundary and the ending boundary
;            and is in the range from 0.0 through 1.0, where 0.0 indicates the starting boundary of the
;            gradient and 1.0 indicates the ending boundary. There must be at least two positions
;            specified: the first position, which is always 0.0, and the last position, which is always
;            1.0. Otherwise, the behavior is undefined. A blend position between 0.0 and 1.0 indicates a
;            line, parallel to the boundary lines, that is a certain fraction of the distance from the
;            starting boundary to the ending boundary. For example, a blend position of 0.7 indicates
;            the line that is 70 percent of the distance from the starting boundary to the ending boundary.
;            The color is constant on lines that are parallel to the boundary lines.
; $iArgb1    - First Top color in 0xAARRGGBB format
; $iArgb2    - Second color in 0xAARRGGBB format
; $LinearGradientMode -  LinearGradientModeHorizontal       = 0x00000000,
;                        LinearGradientModeVertical         = 0x00000001,
;                        LinearGradientModeForwardDiagonal  = 0x00000002,
;                        LinearGradientModeBackwardDiagonal = 0x00000003
; $WrapMode  - WrapModeTile       = 0,
;              WrapModeTileFlipX  = 1,
;              WrapModeTileFlipY  = 2,
;              WrapModeTileFlipXY = 3,
;              WrapModeClamp      = 4
; GdipCreateLineBrushFromRect(GDIPCONST GpRectF* rect, ARGB color1, ARGB color2,
;             LinearGradientMode mode, GpWrapMode wrapMode, GpLineGradient **lineGradient)
; Reference:  http://msdn.microsoft.com/en-us/library/ms534043(VS.85).aspx

Func _GDIPlus_CreateLineBrushFromRect($iX, $iY, $iWidth, $iHeight, $aFactors, $aPositions, _
        $iArgb1 = 0xFF0000FF, $iArgb2 = 0xFFFF0000, $LinearGradientMode = 0x00000001, $WrapMode = 0)

    Local $tRect, $pRect, $aRet, $tFactors, $pFactors, $tPositions, $pPositions, $iCount

    If $iArgb1 = Default Then $iArgb1 = 0xFF0000FF
    If $iArgb2 = Default Then $iArgb2 = 0xFFFF0000
    If $LinearGradientMode = -1 Or $LinearGradientMode = Default Then $LinearGradientMode = 0x00000001
    If $WrapMode = -1 Or $LinearGradientMode = Default Then $WrapMode = 1

    $tRect = DllStructCreate("float X;float Y;float Width;float Height")
    $pRect = DllStructGetPtr($tRect)
    DllStructSetData($tRect, "X", $iX)
    DllStructSetData($tRect, "Y", $iY)
    DllStructSetData($tRect, "Width", $iWidth)
    DllStructSetData($tRect, "Height", $iHeight)

    ;Note: Withn _GDIPlus_Startup(), $ghGDIPDll is defined
    $aRet = DllCall($ghGDIPDll, "int", "GdipCreateLineBrushFromRect", "ptr", $pRect, "int", $iArgb1, _
            "int", $iArgb2, "int", $LinearGradientMode, "int", $WrapMode, "int*", 0)

    If IsArray($aFactors) = 0 Then Dim $aFactors[4] = [0.0, 0.4, 0.6, 1.0]
    If IsArray($aPositions) = 0 Then Dim $aPositions[4] = [0.0, 0.3, 0.7, 1.0]

    $iCount = UBound($aPositions)
    $tFactors = DllStructCreate("float[" & $iCount & "]")
    $pFactors = DllStructGetPtr($tFactors)
    For $iI = 0 To $iCount - 1
        DllStructSetData($tFactors, 1, $aFactors[$iI], $iI + 1)
    Next
    $tPositions = DllStructCreate("float[" & $iCount & "]")
    $pPositions = DllStructGetPtr($tPositions)
    For $iI = 0 To $iCount - 1
        DllStructSetData($tPositions, 1, $aPositions[$iI], $iI + 1)
    Next

    $hStatus = DllCall($ghGDIPDll, "int", "GdipSetLineBlend", "hwnd", $aRet[6], _
            "ptr", $pFactors, "ptr", $pPositions, "int", $iCount)
    Return $aRet[6] ; Handle of Line Brush
EndFunc   ;==>_GDIPlus_CreateLineBrushFromRect

;===========================================================
; Description:  Sets the colors to be interpolated for this linear gradient brush and their
;            corresponding blend positions.
; Parameters
; $hBrush    [in] Pointer to the LinearGradientBrush object.
; $aBlend   [in] Pointer to an array of ARGB colors that specify the colors to be interpolated
;            for this linear gradient brush. A color of a given index in the blend array
;            corresponds to the blend position of that same index in the positions array.
; $aPositions [in] Pointer to an array of real numbers that specify the blend positions.
;               Each number in the array specifies a percentage of the distance between
;               the starting boundary and the ending boundary and is in the range from
;               0.0 through 1.0, where 0.0 indicates the starting boundary of the gradient
;               and 1.0 indicates the ending boundary. There must be at least two positions
;               specified: the first position, which is always 0.0f, and the last position,
;               which is always 1.0f. Otherwise, the behavior is undefined. A blend position
;               between 0.0 and 1.0 indicates the line, parallel to the boundary lines,
;               that is a certain fraction of the distance from the starting boundary to the
;               ending boundary. For example, a blend position of 0.7 indicates the line that
;               is 70 percent of the distance from the starting boundary to the ending boundary.
;               The color is constant on lines that are parallel to the boundary lines.
; GdipSetLinePresetBlend(GpLineGradient *brush, GDIPCONST ARGB *blend, GDIPCONST REAL* positions, INT count)
; Reference:  http://msdn.microsoft.com/en-us/library/ms534043(VS.85).aspx

Func _GDIPlus_SetLinePresetBlend($hBrush, $aBlend = 0, $aPositions = 0)
    Local $iCount, $tBlend, $pBlend, $tPositions, $pPositions, $hStatus, $res
   
    ;                                      Red,      Yellow,      Green,      Blue
    If IsArray($aBlend) = 0 Then Dim $aBlend[4] = [0xFFFF0000, 0xffffff00, 0xFF00FF00, 0xFF0000FF]
    If IsArray($aPositions) = 0 Then Dim $aPositions[4] = [0.0, 0.3, 0.7, 1.0]

    $iCount = UBound($aPositions)
    $tBlend = DllStructCreate("int[" & $iCount & "]")
    $pBlend = DllStructGetPtr($tBlend)
    For $iI = 0 To $iCount - 1
        DllStructSetData($tBlend, 1, $aBlend[$iI], $iI + 1)
    Next
    $tPositions = DllStructCreate("float[" & $iCount & "]")
    $pPositions = DllStructGetPtr($tPositions)
    For $iI = 0 To $iCount - 1
        DllStructSetData($tPositions, 1, $aPositions[$iI], $iI + 1)
    Next

    $hStatus = DllCall($ghGDIPDll, "int", "GdipSetLinePresetBlend", "hwnd", $hBrush, _
            "int", $pBlend, "ptr", $pPositions, "int", $iCount)
    Return
EndFunc   ;==>_GDIPlus_SetLinePresetBlend
Edited by taz742
torels Universalist

torels

Posted
Posted

very well done!

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