GdipTransformPathfunction

Multiplies each of this path's data points by a specified matrix.

Syntax

FUNCTION GdipTransformPath (BYVAL path AS GpPath PTR, BYVAL matrix AS GpMatrix PTR) AS GpStatus

Parameters

Description

Multiplies each of this path's data points by a specified matrix.

Example

' ======================================================================================== ' This example moves and rotates a GraphicsPath using GdipTransformPath. ' ======================================================================================== SUB Example_TransformPath (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)

DIM path AS GpPath PTR hStatus = GdipCreatePath(FillModeAlternate, @path) hStatus = GdipAddPathRectangle(path, 100, 10, 200, 50)

' // Draw the path in blue before applying a transformation. DIM bluePen AS GpPen PTR hStatus = GdipCreatePen1(ARGB_BLUE, 1, UnitWorld, bluePen) hStatus = GdipDrawPath(graphics, bluePen, path)

' // Transform the path. DIM matrix AS GpMatrix PTR hStatus = GdipCreateMatrix(@matrix) hStatus = GdipRotateMatrix(matrix, 30, MatrixOrderPrepend) hStatus = GdipTransformPath(path, matrix) DIM redPen AS GpPen PTR hStatus = GdipCreatePen1(ARGB_RED, 1, UnitWorld, @redPen) hStatus = GdipDrawPath(graphics, redPen, path)

' // Cleanup IF bluePen THEN GdipDeletePen(bluePen) IF redPen THEN GdipDeletePen(redPen) IF matrix THEN GdipDeleteMatrix(matrix) IF path THEN GdipDeletePath(path) IF graphics THEN GdipDeleteGraphics(graphics)

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

Reference

• Defined in AfxNova/AfxGdiPlus.bi:2055
• Documented in Graphics/GdiPlus Flat Api/GdiPlusGraphicsPath.md
• Topic: GraphicsPath Functions