Drawing Bitmaps Using  Assembly Language
     Here is some information and examples about drawing 
bitmaps with pure assembly language.  

LIBRARY : GRAPHICS.ZIP

; /// MACRO AND PROCEDURE DEFINITIONS USED IN THE Graphics.Asm FILE //// 
;;/////////////////////////////////////////////////////////////////////////////////////////////////////// 
SET320X400              PROC 
*
;setmode	calling sequence
;	mode_data   dw 16,0a7h,9
;            dw 0011h,6b00h,5901h,5a02h,8e03h,5f04h,8d05h,8511h,2d13h
;            dw 720,350
;	mov   si, offset mode_data
SETMODE	     PROC 

; initilializes video graphic mode 13
GVID	     MACRO 

GCLS	     MACRO 	COLOR
GOFFSET2RC	     MACRO 	POS

GRC2OFFSET	     MACRO 	ROW,COL

; puts a linefeed on the current screen position
; di will point to the next screen offset address
; pos is the current position
GCRLF	     MACRO 	POS,RELPOS

GBOX	     MACRO 	X1,Y1,X2,Y2,COLOR
GCUTBOX	     MACRO 	SEGMENT,X1,Y1,X2,Y2
GPASTEBOX		     MACRO 	FROMSEG,TOSEG,X1,Y1,X2,Y2

GFORM	     MACRO 	X1,Y1,WID,HEIGHT,COLOR
GCUTFORM	     MACRO 	SEGMENT,X1,Y1,WID,HEIGHT
GCOPYFORM	     MACRO 	SEGMENT,X1,Y1,WID,HEIGHT
GPASTEFORM	     MACRO 	FROMSEG,TOSEG,X1,Y1,WID,HEIGHT
GCREATEFORM	     MACRO 	XFORM,CAPTION
GCLOSEFORM	     MACRO 	FORMX
GMOVEFORM	     MACRO 	XFORM,X2,Y2
GCREATEFORM2	     MACRO 	SEGMENT1,SEGMENT2,X1,Y1,
WID,HEIGHT,COLOR1,FORMNO1,CAPTION
GMOVEFORM2	     MACRO 	FROMSEG,TOSEG,X1,Y1,WID,HEIGHT,X2,Y2
GCLOSEFORM2	     MACRO 	SEGMENT1,X1,Y1,WID,HEIGHT
GRESTOREFORM		     MACRO 	FORMX
GACTIVATEFORM		     MACRO 	FORMX
GVERTLINE	     MACRO 	X1,Y1,HEIGHT,COLOR
GHORZLINE      MACRO  	X1,Y1,WIDTH,COLOR

GRECT	     MACRO 	X1,Y1,WIDTH,HEIGHT,COLOR
GVERTLINEEX	     MACRO 	X1,Y1,X2,Y2,COLOR
GHORZLINEEX      MACRO  X1,Y1,X2,Y2,COLOR

GRECTEX	     MACRO 	X1,Y1,X2,Y2,COLOR
	ENDM
; ///////////////////////////////////////////////////////////////////////////
; ///////////////////////////////////////////////////////////////////////////
CROSSLINE	     MACRO 	X1,Y1,WIDTH,COLOR
CROSSLINEEX	     MACRO 	X1,Y1,WIDTH,COLOR

LINE	     MACRO   X1,Y1,X2,Y2,COLOR
CIRCLE	     MACRO 	X,Y,RAD,COLOR
PUTPIXEL      MACRO  ROW,COL,COLOR
DRAWCANVAS		     MACRO 	STARTBANK,STARTPOS,
WIDTH,HEIGHT,RR,GG,BB

; ////////////////////////////////////////////////////////////////////////////////////////////////
; /////////////////  scan bitmap macro ////////////////////////////////////////
GETBMPPARAMS	     MACRO 	BITMAP
GETFONTPARAMS	     MACRO 	FONTINDEX1
BMPSCAN1ROW	     MACRO 	BITMAP,ROW,BITMAPSIZE,
BMPWIDTH,BITMAPDD,BITMAPLASTBITS
BMPSCAN1COLUMN	     MACRO 	BITMAP,ROW,COL,
BITMAPSIZE,BITMAPWIDTH,FONTHEIGHT
BMPSCANROW	     MACRO 	BITMAP,FROMROW,TOROW,
BITMAPSIZE,BMPWIDTH,BITMAPDD,BITMAPLASTBITS
BMPSCANCOLUMN	     MACRO 	BITMAP,ROW1,FROMCOL,TOCOL,
BITMAPSIZE,BMPWIDTH,BITMAPDD,BITMAPLASTBITS

LOADFONT	     MACRO 	FONTINDEX
	ENDM
; ////////////////////////////////////////////////////////////////////////////////////////////////////////
; //////////////// compare font  ////////////////////////////////////////////////////////////////
COMPAREBITS		     MACRO 	BITMAP,BITMAPSIZE,BITMAPWIDTH,
FONTINDEX1,STARTROW1,STARTCOL1,FONTROW1

; /////////////////////////////////////////////////////////////////////////////////////////
; //////////////// graphics mouse macros  /////////////////////////
DRAWMOUSE	     MACRO 	MPTR,X,Y

; resets mouse and checks if it is atteched
RESETMOUSE	     MACRO