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GdipSetImageAttributesNoOpfunction

Turns off color adjustment for a specified category.

Graphicsfunctiondocumented

Syntax

FUNCTION GdipSetImageAttributesNoOp (BYVAL imageattr AS GpImageAttributes PTR, BYVAL type AS ColorAdjustType, BYVAL enableFlag AS BOOL) AS GpStatus

Parameters

Name		Description
`imageattr`		[in] Pointer to the ImageAttributes object.
`type`		[in] Element of the ColorAdjustType enumeration that specifies the category for which color correction is turned off. The default value is ColorAdjustTypeDefault.
`enableFlag`		[in] Boolean value that specifies whether a color adjustment is enabled for the category specified by the type parameter.

Description

Turns off color adjustment for a specified category.

Example

' ======================================================================================== ' This example applies a grayscale matrix, then disables it using GdipSetImageAttributesNoOp. ' ======================================================================================== SUB Example_SetNoOp (BYVAL hdc AS HDC)

DIM hStatus AS LONG

' // Create a graphics object from the device context DIM graphics AS GpGraphics PTR hStatus = GdipCreateFromHDC(hdc, @graphics)

' // Get the DPI scaling ratios DIM dpiX AS SINGLE hStatus = GdipGetDpiX(graphics, @dpiX) DIM rxRatio AS SINGLE = dpiX / 96 DIM dpiY AS SINGLE hStatus = GdipGetDpiY(graphics, @dpiY) Dim ryRatio AS SINGLE = dpiY / 96 ' // Set the scale transform hStatus = GdipScaleWorldTransform(graphics, rxRatio, ryRatio, MatrixOrderPrepend)

' Load image DIM image AS GpImage PTR GdipLoadImageFromFile("climber.jpg", @image)

' Get image dimensions DIM nWidth AS UINT DIM nHeight AS UINT GdipGetImageWidth(image, @nWidth) GdipGetImageHeight(image, @nHeight)

' Create ImageAttributes DIM imgAttr AS GpImageAttributes PTR GdipCreateImageAttributes(@imgAttr)

' Define grayscale matrix DIM grayMatrix AS ColorMatrix grayMatrix.m(0,0) = 0.3 : grayMatrix.m(0,1) = 0.3 : grayMatrix.m(0,2) = 0.3 grayMatrix.m(1,0) = 0.59: grayMatrix.m(1,1) = 0.59: grayMatrix.m(1,2) = 0.59 grayMatrix.m(2,0) = 0.11: grayMatrix.m(2,1) = 0.11: grayMatrix.m(2,2) = 0.11 grayMatrix.m(3,3) = 1 grayMatrix.m(4,4) = 1

' Apply grayscale matrix GdipSetImageAttributesColorMatrix(imgAttr, ColorAdjustTypeBitmap, TRUE, @grayMatrix, NULL, ColorMatrixFlagsDefault)

' Draw grayscale image GdipDrawImageRectRect(graphics, image, 10, 10, nWidth, nHeight, 0, 0, nWidth, nHeight, UnitPixel, imgAttr, NULL, NULL)

' Disable color adjustments using GdipSetImageAttributesNoOp GdipSetImageAttributesNoOp(imgAttr, ColorAdjustTypeBitmap, TRUE)

' Draw original image (no color matrix applied) GdipDrawImageRectRect(graphics, image, 210, 10, nWidth, nHeight, 0, 0, nWidth, nHeight, UnitPixel, imgAttr, NULL, NULL)

' Cleanup GdipDisposeImage(image) GdipDeleteGraphics(graphics) GdipDisposeImageAttributes(imgAttr)

END SUB ' ========================================================================================

Reference

Defined in AfxNova/AfxGdiPlus.bi:2139
Documented in Graphics/GdiPlus Flat Api/GdiPlusImageAttributes.md
Topic: ImageAttributes Functions