SetImageMaskCMYK

影像處理、色彩、頁面版面

描述

設定所選影像的遮罩，可用來在以 DrawImage 或 DrawScaledImage 函式繪製時讓影像局部透明。指定的顏色範圍會變成透明。加入的影像是 CMYK 影像時用此函式；RGB 影像請用 SetImageMask 函式。顏色參數值域為 0 到 1，0 代表 0%、1 代表 100%

語法

Delphi

Function TPDFlib.SetImageMaskCMYK(FromC, FromM, FromY, FromK, ToC, ToM, ToY, ToK: Double): Integer;

ActiveX

Function PDFlib::SetImageMaskCMYK(FromC As Double, FromM As Double, FromY As Double, FromK As Double, ToC As Double, ToM As Double, ToY As Double, ToK As Double) As Long

DLL

int DLSetImageMaskCMYK(int InstanceID, double FromC, double FromM, double FromY, double FromK, double ToC, double ToM, double ToY, double ToK);

參數

FromC	遮罩起始顏色的青成分
FromM	遮罩起始顏色的洋紅成分
FromY	遮罩起始顏色的黃成分
FromK	遮罩起始顏色的黑成分
ToC	遮罩結束顏色的紅成分
ToM	遮罩結束顏色的洋紅成分遮罩結束顏色的黃成分
ToY	遮罩結束顏色的黑成分
ToK

傳回值

0	No image was selected
1	影像遮罩設定成功 double ToY, double ToK);