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Q40351: Call _setvideomode before Calling _imagesize

Article: Q40351
Product(s): See article
Version(s): 5.00 5.10
Operating System(s): MS-DOS
Keyword(s): ENDUSER | S_QuickC | mspl13_c
Last Modified: 16-JAN-1989

Problem:

I am using the _imagesize function to determine the size required to
store a graphics image. However, this function is not returning the
expected result.

Response:

The _imagesize function calls _getvideoconfig to determine the number
of bits required to store a pixel given the CURRENT video mode. If you
are calling _imagesize prior to calling _setvideomode, an unexpected
result is returned by _imagesize.

In summary, do the following in order:

1. _setvideomode

2. _imagesize

3. _getimage and putimage

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