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This is often used to make a window semitransparent while it is being moved. Uniform Translucency controls the opacity of the window by applying a single alpha blend value to the whole window. Color Key transparency does not support alpha blending, but it can be combined with Uniform Translucency to soften the edges of the image.ĭelphi support Color Key transparency with the TForm.TransparentColor and TForm.TransparentColorValue properties. Transparency is accomplished by defining one color that wont be drawn when the window is rendered onto the screen. Different Kinds of Transparency Color Key transparencyĬolor Key transparency is the simplest form of transparency.
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In other words Opaque is the opposite of transparent. Impenetrable by light neither transparent nor translucent. Semi transparent is the same as translucent. In other words: Translucent means partially transparent. Permitting light to pass through but diffusing it so that persons, objects, etc., on the opposite side are not clearly visible. In other words Transparent means invisible. ent Ĭapable of transmitting light so that objects or images can be seen as if there were no intervening material.Before we get our hands dirty with some code, I will introduce the most common kinds of transparency, but first we need to define some terms (definitions courtesy of ): Transparent trans In this tutorial we will use only one kind of transparency Alpha Blending, and one implementation The UpdateLayeredWindow API. There are many different ways to implement and use transparency. Part 2 has been posted: Alpha Blended Splash Screen in Delphi - Part 2 Transparency, Opacity, Translucency In this first of two articles, I will demonstrate how to easily create an alpha blended translucent splash screen using Delphi.Īlthough I use Delphi 2007 and PhotoShop here, the techniques apply equally well to other versions of Delphi and other image editing tools.
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