Story Category: ttransparentcanvas

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TTransparentCanvas: changing the background color of glowing text

Dave Dave You have probably already seen how to use DrawThemeTextEx on Vista and above to draw text with a white blurry ‘glow’ effect behind it. It’s commonly used when drawing on glass, to ensure that text… … Read more 11 years ago in alpha transparency, alphablend, Delphi, drawthemetextex, ttransparentcanvas 0

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Transparent graphics with pure GDI (Part 2) – and introducing the TTransparentCanvas class

Dave Dave This is part 2 of a short series that examines alpha-aware graphics using native GDI only – not GDI+, not DirectX, and not with any other custom non-GDI graphics implementation. This post will cover: Non-rectangular… … Read more 13 years ago in alpha transparency, alphablend, Delphi, ttransparentcanvas 0

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Transparent graphics with pure GDI (Part 1)

Dave Dave Transparent graphics are used everywhere these days.  Half the UIs you will have used today will have made some use of composited graphics, overlays, or something similar.  You’ve probably seen: Selections with transparent rectangles or… … Read more 13 years ago in alpha transparency, alphablend, Delphi, ttransparentcanvas 0