; $Id: tmap_inc.asm,v 1.4 2003-12-08 21:21:16 btb Exp $
;THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
;SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
;END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
;ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
;IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
;SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
;FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
;CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
;AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
;COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
;
;
; Mike's include file for the texture mapper library.
;
; Old Log:
; Revision 1.10  1995/02/20  18:22:52  john
; Put all the externs in the assembly modules into tmap_inc.asm.
; Also, moved all the C versions of the inner loops into a new module,
; scanline.c.
;
; Revision 1.9  1994/12/02  23:29:45  mike
; Add y_pointers.
;
; Revision 1.8  1994/11/12  16:39:36  mike
; jae to ja.
;
; Revision 1.7  1994/10/26  23:27:39  john
; Took out references to gr_inverse_table.
;
; Revision 1.6  1994/10/26  23:21:55  mike
; kill unused stuff.
;
; Revision 1.5  1994/07/27  18:39:20  john
; Took out references to blend table
;
; Revision 1.4  1994/01/31  15:40:17  mike
; Add window_height.
;
; Revision 1.3  1993/12/07  12:27:48  john
; Moved bmd_palette to gr_palette
;
; Revision 1.2  1993/11/22  10:24:10  mike
; *** empty log message ***
;
; Revision 1.1  1993/09/08  17:29:47  mike
; Initial revision
;
;
;

; VESA in this file must be the same as VESA in tmap.h
VESA	equ	0

direct_to_video	equ	0
%if direct_to_video
  %if VESA

; for vesa mode
WINDOW_LEFT	=	0
WINDOW_RIGHT	=	300
WINDOW_TOP	=	0
WINDOW_BOTTOM	=	200
WINDOW_WIDTH	=	WINDOW_RIGHT - WINDOW_LEFT
BYTES_PER_ROW	=	300*2

  %else

; for non-vesa mode
WINDOW_LEFT	=	58
WINDOW_RIGHT	=	262
WINDOW_TOP	=	34
WINDOW_BOTTOM	=	167
WINDOW_WIDTH	=	WINDOW_RIGHT - WINDOW_LEFT
BYTES_PER_ROW	=	320		; number of bytes between rows

  %endif

; for vesa, 15 bit color, 640x480x2
SCREEN_WIDTH	=	640
SCREEN_HEIGHT	=	480
BYTES_PER_PIXEL	=	2
%endif

%ifdef __ELF__
; It appears that ELF C compilers do not prefix symbols with '_', so here we
; cater for them...
%define _gr_fade_table  gr_fade_table
%define _write_buffer   write_buffer
%define _window_left    window_left
%define _window_right   window_right
%define _window_top     window_top
%define _window_bottom  window_bottom
%define _window_width   window_width
%define _window_height  window_height
%define _bytes_per_row  bytes_per_row
%define _y_pointers     y_pointers

%define _per2_flag      per2_flag
%define _tmap_flat_cthru_table          tmap_flat_cthru_table
%define _tmap_flat_color                tmap_flat_color
%define _tmap_flat_shade_value          tmap_flat_shade_value
%define _dither_intensity_lighting      dither_intensity_lighting
%define _Lighting_on                    Lighting_on

%define _Transparency_on        Transparency_on
%define _fx_u                   fx_u
%define _fx_v                   fx_v
%define _fx_z                   fx_z
%define _fx_l                   fx_l
%define _fx_du_dx               fx_du_dx
%define _fx_dv_dx               fx_dv_dx
%define _fx_dz_dx               fx_dz_dx
%define _fx_dl_dx               fx_dl_dx
%define _fx_y                   fx_y
%define _fx_xleft               fx_xleft
%define _fx_xright              fx_xright
%define _pixptr                 pixptr
%endif

        extern	_gr_fade_table;:byte
;NO_INVERSE_TABLE	extrn	_gr_inverse_table:byte
	extern	_write_buffer;:dword
	extern	_window_left;:dword
	extern _window_right;:dword
	extern _window_top;:dword
	extern _window_bottom;:dword,
	extern _window_width;:dword,
	extern _bytes_per_row;:dword,
	extern _window_height;:dword
	extern	_y_pointers;:dword

;NO_INVERSE_TABLE _rgb_to_palette	equ	_gr_inverse_table
;NO_INVERSE_TABLE _pixel_average	equ 	_gr_inverse_table		; should be blend table, but i took it out -john

max_window_width	equ	800
num_iters	equ 	max_window_width

%if num_iters & 1
%assign num_iters num_iters+1
%endif
	extern _per2_flag;:dword
	extern _tmap_flat_cthru_table;:dword
	extern _tmap_flat_color;:byte
	extern _tmap_flat_shade_value;:byte
	extern _dither_intensity_lighting;:dword
	extern _Lighting_on;:dword

; DPH: Selectors are about as portable as a rock.
;        extern _pixel_data_selector;:word
;        extern _gr_fade_table_selector;:word

	extern _Transparency_on;:dword
	extern _fx_u;:dword
	extern _fx_v;:dword
	extern _fx_z;:dword
	extern _fx_l;:dword
	extern _fx_du_dx;:dword
	extern _fx_dv_dx;:dword
	extern _fx_dz_dx;:dword
	extern _fx_dl_dx;:dword
	extern _fx_y;:dword
	extern _fx_xleft;:dword
	extern _fx_xright;:dword
	extern _pixptr;:dword