ObjReader Community
GDImage => The concept => Topic started by: Patrice Terrier on June 27, 2023, 06:13:16 pm
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Eighth post of a series, translated from the "WinDev and PowerBASIC",
to explain the use of GDImage64 in procedural* programming mode with Visual Studio 2022.
About Tutor_08
This tutor introduces the use of multiple overlapping transparent layers, working in DWM composited mode.
The "aero_glass.png" used at the top of the z-order is displayed in "ZS_INACTIVE" mode,
that means it is disabled, however, all WM_ messages are passed to the immediate underlaying sprites.
Even the layer shown at the bottom of the z-order is using variable opacity,
which makes it possible to discern the windows desktop in the background.
The fish animation is using 4 bitmaps, each bitmap being composed of multi frames.
See the DetectMultiframe() function.
Last but not least,
the size of the standalone binary EXE is only 13 Kb.
(http://www.objreader.com/download/images/Tutor_08.jpg)
* procedural programming mode, is based on direct use of the FLAT API (Windows SDK) that is the core meat of the OS.