Using Win32 functions in Visual FoxPro Image Gallery
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GDI+: converting image file to another graphics format

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Before you begin:
The code is based on custom GDI+ class. Download the class module first and save it in gdiplus.prg file.

Make sure the source and target file names are valid. The source file can be in any of graphics formats supported by the GDI+: BMP, GIF, JPG, TIF, EMF...

SET PROCEDURE TO gdiplus ADDITIVE

* an instance of gdiplusinit should be created before
* and released after using any of gdi+ objects
PRIVATE gdiplus
gdiplus = CREATEOBJECT("gdiplusinit")

LOCAL img
img = CREATEOBJECT("gdiimage", "c:\windows\forest.bmp")
WITH img
    .SaveToFile("d:\temp\tmp.bmp")
    .SaveToFile("d:\temp\tmp.gif")
    .SaveToFile("d:\temp\tmp.jpg")
    .SaveToFile("d:\temp\tmp.png")
    .SaveToFile("d:\temp\tmp.tif")
ENDWITH



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452 bytes  
Created: 2004-07-05 19:40:43  
Modified: 2011-12-10 09:20:22  
Visits in 7 days: 160  
Listed functions:
Printer friendly API declarations
My comment:
The base class has encoder CLSIDs implemented as constants. Event though it works perfectly, in real-life programming I suggest using the GdipGetImageEncoders function to retrieve parameters of the image encoders currently available on the system.
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Last Topics Visited (54.82.112.193)
16 sec.Function: 'GdipInvertMatrix'
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48 sec.Example: 'Converting image file to .ICO file'
1.08 min.Function: 'GdipCreateFromHWND'
1.33 min.Function: 'GdipFillRectangle'
1.62 min.Function: 'DeleteObject'
1.85 min.Example: 'GDI+: enumerating fonts installed on the system'
2.15 min.Function: 'GdipGetImageGraphicsContext'
2.42 min.Function: 'GdipDeleteGraphics'
Function group: 'GDI+ Graphics'
2.7 min.Function: 'GdipScaleMatrix'
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