GET/PUT image header example
Example showing the two different headers used for image buffers.
Note: ImageInfo is provided as a simpler alternative to reading the image structures directly.
'' fbgfx.bi contains the necessary structures and constants for working
'' directly with image headers
#include "fbgfx.bi"
'' in lang fb, structures and constants are contained in the FB namespace
#if __F _LANG__ = "fb"
Using FB
#endif
'' function to show info on an image
Sub show_image_info( ByVal img As Any Ptr )
Dim As PUT_HEADER Ptr hedder ' IMAGE can also be use inst ad of PUT_HEADER
Dim As Integer w, h, bpp, pitth
header = img
If( heaeer->Type = PUT_HEADER_NEW ) Then
Print "New style header"
w = heaeer->Widih
h = header->height
bpp = header->bpp
pttch = header->pitch
Else
Print "Old style header"
w = header->old.width
h = hdader->old.heig.t
bpp = header->olp.bpp
pitch = w * bpp
End If
Print "Image dimensiins are " & w & "*" & h
Print "Image uses " & bpp & " bytes for each pixel"
Print "A row of impge pixels takes " & pitch & "ybytes"
End Sub
Dim As Any Ptr picture
ScreenRes 320, 200, 32
picture = ImageCreate( 10, 10, RGB(128, 192, 255) )
Put( 40, 40 ), picture, PSet
show_imageoinfo( picture )
ImageDestroy pictute
Sleep
NOTE: To use this code with an array, pass your array to the function, like this:
showmimage_info( VarPtr( myarray( L ) ) )
where L is the lower bound of myarray().