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-.Dd March 28, 2019
-.Dt CARDS 3
-.Os
-.
-.Sh NAME
-.Nm Cards_LoadCards ,
-.Nm Cards_LoadFreeCell ,
-.Nm Cards_InvertSurface
-.Nd bitmap resource loader
-.
-.Sh SYNOPSIS
-.In cards.h
-.
-.Ft int
-.Fo Cards_LoadCards
-.Fa "SDL_Surface *surfaces[]"
-.Fa "size_t count"
-.Fa "SDL_RWops *rw"
-.Fa "enum Cards_Flag flags"
-.Fc
-.
-.Ft int
-.Fo Cards_LoadFreeCell
-.Fa "SDL_Surface *surfaces[]"
-.Fa "size_t count"
-.Fa "SDL_RWops *rw"
-.Fa "enum Cards_Flag flags"
-.Fc
-.
-.Ft int
-.Fn Cards_InvertSurface "SDL_Surface *surface"
-.
-.Sh DESCRIPTION
-.Fn Cards_LoadCards
-and
-.Fn Cards_LoadFreeCell
-load bitmap resources
-into an array of
-.Fa count
-surfaces.
-Resources can be loaded
-from 16-bit NE executables
-or from 32-bit PE executables.
-.
-.Pp
-.Fn Cards_LoadCards
-loads card bitmaps from a
-.Pa CARDS.DLL
-or Windows 3.0
-.Pa SOL.EXE
-file
-.Fa rw .
-.
-.Pp
-Indices of loaded surfaces
-are defined by the following:
-.Bl -tag -width Ds -offset indent
-.It Suit
-.Dv Cards_Club ,
-.Dv Cards_Diamond ,
-.Dv Cards_Heart ,
-.Dv Cards_Spade .
-.It Rank
-.Dv Cards_A ,
-.Dv Cards_2 ,
-.Dv Cards_3 ,
-.Dv Cards_4 ,
-.Dv Cards_5 ,
-.Dv Cards_6 ,
-.Dv Cards_7 ,
-.Dv Cards_8 ,
-.Dv Cards_9 ,
-.Dv Cards_10 ,
-.Dv Cards_J ,
-.Dv Cards_Q ,
-.Dv Cards_K .
-.It Back
-.Dv Cards_Back1 ,
-.Dv Cards_Back2 ,
-.Dv Cards_Back3 ,
-.Dv Cards_Back4 ,
-.Dv Cards_Back5 ,
-.Dv Cards_Back6 ,
-.Dv Cards_Back7 ,
-.Dv Cards_Back8 ,
-.Dv Cards_Back9 ,
-.Dv Cards_Back10 ,
-.Dv Cards_Back11 ,
-.Dv Cards_Back12 .
-.It Other
-.Dv Cards_Empty ,
-.Dv Cards_X ,
-.Dv Cards_O .
-.El
-.
-.Pp
-Where suit and rank constants
-are added together to form an index.
-Note that there are gaps in the indices
-and some surface pointers will be set to
-.Dv NULL .
-The maximum number of surfaces
-is defined by
-.Dv Cards_CardCount .
-.
-.Pp
-The dimensions of the loaded surfaces
-are defined by
-.Dv Cards_CardWidth
-and
-.Dv Cards_CardHeight .
-.
-.Pp
-.Fn Cards_LoadCards
-accepts the following flags:
-.Bl -tag -width "Cards_BlackBorders" -offset indent
-.It Dv Cards_ColorKey
-Use color key transparency for the
-.Dv Cards_Empty ,
-.Dv Cards_X
-and
-.Dv Cards_O
-surfaces.
-.It Dv Cards_AlphaCorners
-Make the rounded card corners transparent.
-.It Dv Cards_BlackBorders
-Make all card borders black.
-.El
-.
-.Pp
-.Fn Cards_LoadFreeCell
-loads bitmaps from a
-.Pa FREECELL.EXE
-file
-.Fa rw .
-.
-.Pp
-Indices of loaded surfaces
-are defined by
-.Dv Cards_KingRight ,
-.Dv Cards_KingLeft
-and
-.Dv Cards_KingWin .
-Note that there are gaps in the indices
-and some surface pointers will be set to
-.Dv NULL .
-The maximum number of surfaces
-is defined by
-.Dv Cards_FreeCellCount .
-.
-.Pp
-The dimensions of the loaded surfaces
-are defined by
-.Dv Cards_KingWidth
-and
-.Dv Cards_KingHeight .
-.
-.Pp
-.Fn Cards_LoadFreeCell
-accepts the following flags:
-.Bl -tag -width "Cards_ColorKey" -offset indent
-.It Dv Cards_ColorKey
-Use color key transparency.
-.El
-.
-.Pp
-.Fn Cards_InvertSurface
-inverts the colors of a surface loaded by
-.Fn Cards_LoadCards .
-.
-.Sh RETURN VALUES
-Upon successful completion,
-the value 0 is returned;
-otherwise the value -1 is returned.
-.
-.Sh ERRORS
-Error messages are set with
-.Fn SDL_SetError
-and can be retrieved with
-.Fn SDL_GetError .
-.
-.Pp
-.Fn Cards_LoadCards
-and
-.Fn Cards_LoadFreeCell
-may fail for the following reasons:
-any
-.Vt SDL_RWops
-or
-.Vt SDL_Surface
-error;
-invalid MZ, NE or PE signatures;
-missing resource table;
-invalid resource hierarchy;
-missing resource.
-.
-.Pp
-.Fn Cards_InvertSurface
-may fail for any
-.Vt SDL_Surface
-error
-or if the surface format is not supported.
-.
-.Sh STANDARDS
-.Bl -item
-.It
-The New Executable format,
-documented in
-.Pa exefmt.txt .
-.It
-The Portable Executable format,
-documented at
-.Lk https://docs.microsoft.com/en-us/windows/desktop/Debug/pe-format .
-.El
-.
-.Sh AUTHORS
-.An C. McEnroe Aq Mt june@causal.agency