' error codes for all codecs, returned via imageinfo->thumbnail
' note: 2 to 9 are not used, we start at 10
'
' if negative it's a standard gemdos error code
' if positive it's related the content of the file
'
'
' standard gemdos error codes, these are just here for my reference
' codecs return gemdos error codes where it makes sense
LET ec_fwrite&=-10      !fwrite failed, size in/out didn't match, or negative error code
LET ec_fread&=-11       !fread failed, size in/out didn't match, or negative error code
LET ec_fopen&=-33       !fopen failed, image file not found
LET ec_fcreate&=-36     !fcreate failed
LET ec_fclose&=-37      !fclose failed
LET ec_malloc&=-39      !malloc failed
LET ec_mfree&=-40       !mfree failed
LET ec_fseek&=-64       !fseek failed, truncated file?
'
'
' error codes related to file content
' these will be used in multiple codecs and maybe new codecs in the future
LET ec_comptype&=10             !header -> unsupported compression type
LET ec_decomperror&=11          !error during decompression phase
LET ec_resolutiontype&=12       !header -> unsupported mode code neo/degas
LET ec_imagetype&=13            !header -> unsupported image type
LET ec_pixeldepth&=14           !header -> unsupported pixel depth
LET ec_colormapdepth&=15        !header -> unsupported color map depth
LET ec_colormaptype&=16         !header -> unsupported color map type
LET ec_filelength&=17           !incorrect file length
LET ec_fileid&=18               !header -> unknown file identifier
LET ec_headerlength&=19         !header -> unsupported header length
LET ec_widthnegative&=20        !header -> image width < 0
LET ec_heightnegative&=21       !header -> image height < 0
LET ec_internalerror&=22        !non-specific, subfunction failure: png/gif
LET ec_colorspace&=23           !header -> unsupported color space
LET ec_colormaplength&=24       !header -> unsupported color map length
LET ec_masktype&=25             !header -> unsupported mask type
LET ec_chunkid&=26              !unsupported chunk identifier: iff
LET ec_filetype&=27             !received wrong file type
LET ec_framecount&=28           !frame count exceeds limit
LET ec_colorcount&=29           !header -> unsupported color count
LET ec_bitmaplength&=30         !header -> calc'd length doesn't match
LET ec_headerversion&=31        !header -> unsupported version
LET ec_heightsmall&=32          !header -> unsupported height, to small: fnt
LET ec_complength&=33           !header -> incorrect compressed size: spx
LET ec_frametype&=34            !header -> unsupported frame type: seq
LET ec_requiresnvdi&=35         !NVDI not installed
LET ec_funcnotdefined&=36       !function not implemented
' new error codes will be added to the end of this list as needed