Is alpha transparent supported in NewPagFromCanvDC : cathylin, I have had a quick...

Wed, 18 Sep 2013 04:48:36 +0000

Author: AndrewC
Subject: 2733
Posted: 18 Sep 13 at 4:48AM

cathylin,

I have had a quick look at the source code. The Gradient fills are supported but brush transparency is not supported.

This could get quite complex to implement as it is not always easy to map GDI+ calls to PDF. I will add it to the todo list for the GDI+ metafile code.

Andrew.

Is alpha transparent supported in NewPagFromCanvDC : Hi, I am tring to use gdiplus...

Tue, 17 Sep 2013 16:37:45 +0000

Author: cathyling
Subject: 2733
Posted: 17 Sep 13 at 4:37PM

Hi, I am tring to use gdiplus create a transparent brush. The NewPageFromCanvasDC can't fill if the Color alpha value <255.

Codes:

HDC dc = QP.GetCanvasDC(1000,800);
Graphics myGraphics(dc);
Color colors[] = {
      Color(255, 255, 0, 0),   // red
      Color(155, 0, 0, 255),   // blue
      Color(55, 0, 255, 0)}; // green

REAL positions[] = { 0.0f, 0.3f, 1.0f};

LinearGradientBrush linGrBrush3( Point(0, 0), Point(300, 0),Color(255, 0, 0, 0), Color(255, 255, 255, 255));

linGrBrush3.SetInterpolationColors(colors, positions, 3);
myGraphics.FillRectangle(&linGrBrush3, 220, 220, 500, 650);

QP.NewPageFromCanvasDC(300, -1);

Can anyone help me? Thanks.

Debenu Quick PDF Library - PDF SDK Community Forum : Is alpha transparent supported in NewPagFromCanvDC

Is alpha transparent supported in NewPagFromCanvDC : cathylin, I have had a quick...

Is alpha transparent supported in NewPagFromCanvDC : Hi, I am tring to use gdiplus...