Delphi Coloring Pages

Abstract: Several pages in efg's Computer Lab and Reference Library contain a number of resources about color, including examples and projects in Delphi. This article is a summary of these color resources.

Information about using color in Delphi can be found on the Delphi Graphics Algorithms: Color page. Some of the topics on that page include:

Alpha Blending
Color Gradients
Color Quantization/Color Reduction
Color Spaces, Conversions
Display Mode Colors
Gamma Correction
GetDeviceCaps
Color Conversion
Gray Scale
Hue / Saturation
Palettes (Creation, Examples)
Spectrum/Rainbow
System Colors

Information about color-related Run Time Library (RTL) routines (e.g., ColorToRGB, GetRValue, PaletteRGB, etc.) is on the Delphi Graphics: VCL and RTL page in the Delphi Reference Library

Several Lab Reports, complete with Delphi source code, deal with various aspects of color:

Palettes

Palette Lab

The Gervautz-Purgathofer Octree Color Quantization algorithm was adapted from Jeff Prosise's "Wicked Code" in the October 1997 Microsoft Systems Journal in the ShowDemoOne and ShowDemoMany Lab Reports. (These projects only display pf24bit bitmaps in 256 color mode -- they do not convert a bitmap to pf8bit PixelFormat.)