mirror of
https://github.com/scp-fs2open/fs2open.github.com.git
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taylor
7a1d701bc7
git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@3624 387891d4-d844-0410-90c0-e4c51a9137d3
233 lines
12 KiB
C
233 lines
12 KiB
C
/*
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* Copyright (C) Volition, Inc. 1999. All rights reserved.
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*
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* All source code herein is the property of Volition, Inc. You may not sell
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* or otherwise commercially exploit the source or things you created based on the
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* source.
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*
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*/
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/*
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* $Logfile: /Freespace2/code/Graphics/Line.h $
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* $Revision: 2.4 $
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* $Date: 2006-10-06 09:56:42 $
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* $Author: taylor $
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*
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* Header file for line.cpp
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*
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* $Log: not supported by cvs2svn $
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* Revision 2.3 2005/07/13 03:15:51 Goober5000
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* remove PreProcDefine #includes in FS2
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* --Goober5000
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*
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* Revision 2.2 2004/08/11 05:06:24 Kazan
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* added preprocdefines.h to prevent what happened with fred -- make sure to make all fred2 headers include this file as the _first_ include -- i have already modified fs2 files to do this
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*
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* Revision 2.1 2004/03/08 15:03:27 Kazan
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* *crosses fingers*
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*
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* Revision 2.0 2002/06/03 04:02:23 penguin
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* Warpcore CVS sync
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*
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* Revision 1.1 2002/05/02 18:03:07 mharris
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* Initial checkin - converted filenames and includes to lower case
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*
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*
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* 2 10/07/98 10:53a Dave
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* Initial checkin.
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*
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* 1 10/07/98 10:49a Dave
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*
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* 10 5/06/98 5:30p John
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* Removed unused cfilearchiver. Removed/replaced some unused/little used
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* graphics functions, namely gradient_h and _v and pixel_sp. Put in new
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* DirectX header files and libs that fixed the Direct3D alpha blending
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* problems.
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*
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* 9 3/10/98 4:18p John
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* Cleaned up graphics lib. Took out most unused gr functions. Made D3D
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* & Glide have popups and print screen. Took out all >8bpp software
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* support. Made Fred zbuffer. Made zbuffer allocate dynamically to
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* support Fred. Made zbuffering key off of functions rather than one
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* global variable.
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*
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* 8 10/03/97 9:10a John
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* added better antialiased line drawer
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*
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* 7 6/13/97 5:35p John
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* added some antialiased bitmaps and lines
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*
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* 6 11/26/96 6:50p John
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* Added some more hicolor primitives. Made windowed mode run as current
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* bpp, if bpp is 8,16,or 32.
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*
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* 5 10/26/96 2:56p John
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* Got gradient code working.
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*
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* 4 10/26/96 1:40p John
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* Added some now primitives to the 2d library and
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* cleaned up some old ones.
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*
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* $NoKeywords: $
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*/
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#ifndef _LINE_H
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#define _LINE_H
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//void gr8_line(int x1,int y1,int x2,int y2, bool b);
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//void gr8_aaline(vertex *v1, vertex *v2);
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#define INT_EXCHG(a,b) do { \
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int __temp__ = (a); \
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(a) = (b); \
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(b) = __temp__; \
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} while(0)
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//#define INT_SCALE(var,arg,num,den) ((var) = ((arg) * (num)) / (den))
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#define INT_SCALE(var,arg,num,den) ((var) = MulDiv(arg, num, den))
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#define INT_CLIPLINE(x1,y1,x2,y2,XMIN,YMIN,XMAX,YMAX,WHEN_OUTSIDE,WHEN_CLIPPED,WHEN_SWAPPED) do { \
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int temp; \
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\
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if(y1 > y2) \
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{ INT_EXCHG(y1,y2); INT_EXCHG(x1,x2); WHEN_SWAPPED; } \
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if((y2 < YMIN) || (y1 > YMAX)) \
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{ WHEN_OUTSIDE; } \
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if(x1 < x2) { \
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if((x2 < XMIN) || (x1 > XMAX)) { \
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WHEN_OUTSIDE; \
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} \
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if(x1 < XMIN) { \
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INT_SCALE(temp,(y2 - y1),(XMIN - x1),(x2 - x1)); \
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if((y1 += temp) > YMAX) { WHEN_OUTSIDE; } \
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x1 = XMIN; \
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WHEN_CLIPPED; \
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} \
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if(x2 > XMAX) { \
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INT_SCALE(temp,(y2 - y1),(x2 - XMAX),(x2 - x1)); \
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if((y2 -= temp) < YMIN) { WHEN_OUTSIDE; } \
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x2 = XMAX; \
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WHEN_CLIPPED; \
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} \
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if(y1 < YMIN) { \
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INT_SCALE(temp,(x2 - x1),(YMIN - y1),(y2 - y1)); \
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x1 += temp; \
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y1 = YMIN; \
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WHEN_CLIPPED; \
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} \
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if(y2 > YMAX) { \
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INT_SCALE(temp,(x2 - x1),(y2 - YMAX),(y2 - y1)); \
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x2 -= temp; \
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y2 = YMAX; \
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WHEN_CLIPPED; \
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} \
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} \
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else { \
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if((x1 < XMIN) || (x2 > XMAX)) { \
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WHEN_OUTSIDE; \
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} \
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if(x1 > XMAX) { \
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INT_SCALE(temp,(y2 - y1),(x1 - XMAX),(x1 - x2)); \
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if((y1 += temp) > YMAX) { WHEN_OUTSIDE; } \
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x1 = XMAX; \
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WHEN_CLIPPED; \
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} \
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if(x2 < XMIN) { \
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INT_SCALE(temp,(y2 - y1),(XMIN - x2),(x1 - x2)); \
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if((y2 -= temp) < YMIN) { WHEN_OUTSIDE; } \
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x2 = XMIN; \
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WHEN_CLIPPED; \
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} \
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if(y1 < YMIN) { \
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INT_SCALE(temp,(x1 - x2),(YMIN - y1),(y2 - y1)); \
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x1 -= temp; \
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y1 = YMIN; \
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WHEN_CLIPPED; \
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} \
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if(y2 > YMAX) { \
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INT_SCALE(temp,(x1 - x2),(y2 - YMAX),(y2 - y1)); \
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x2 += temp; \
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y2 = YMAX; \
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WHEN_CLIPPED; \
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} \
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} \
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} while(0)
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#define FL_EXCHG(a,b) do { \
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float __temp__ = (a); \
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(a) = (b); \
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(b) = __temp__; \
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} while(0)
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#define FL_SCALE(var,arg,num,den) ((var) = ((arg) * (num)) / (den))
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#define FL_CLIPLINE(x1,y1,x2,y2,XMIN,YMIN,XMAX,YMAX,WHEN_OUTSIDE,WHEN_CLIPPED,WHEN_SWAPPED) do { \
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float temp; \
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\
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if(y1 > y2) \
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{ FL_EXCHG(y1,y2); FL_EXCHG(x1,x2); WHEN_SWAPPED; } \
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if((y2 < YMIN) || (y1 > YMAX)) \
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{ WHEN_OUTSIDE; } \
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if(x1 < x2) { \
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if((x2 < XMIN) || (x1 > XMAX)) { \
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WHEN_OUTSIDE; \
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} \
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if(x1 < XMIN) { \
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FL_SCALE(temp,(y2 - y1),(XMIN - x1),(x2 - x1)); \
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if((y1 += temp) > YMAX) { WHEN_OUTSIDE; } \
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x1 = XMIN; \
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WHEN_CLIPPED; \
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} \
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if(x2 > XMAX) { \
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FL_SCALE(temp,(y2 - y1),(x2 - XMAX),(x2 - x1)); \
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if((y2 -= temp) < YMIN) { WHEN_OUTSIDE; } \
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x2 = XMAX; \
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WHEN_CLIPPED; \
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} \
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if(y1 < YMIN) { \
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FL_SCALE(temp,(x2 - x1),(YMIN - y1),(y2 - y1)); \
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x1 += temp; \
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y1 = YMIN; \
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WHEN_CLIPPED; \
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} \
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if(y2 > YMAX) { \
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FL_SCALE(temp,(x2 - x1),(y2 - YMAX),(y2 - y1)); \
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x2 -= temp; \
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y2 = YMAX; \
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WHEN_CLIPPED; \
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} \
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} \
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else { \
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if((x1 < XMIN) || (x2 > XMAX)) { \
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WHEN_OUTSIDE; \
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} \
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if(x1 > XMAX) { \
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FL_SCALE(temp,(y2 - y1),(x1 - XMAX),(x1 - x2)); \
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if((y1 += temp) > YMAX) { WHEN_OUTSIDE; } \
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x1 = XMAX; \
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WHEN_CLIPPED; \
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} \
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if(x2 < XMIN) { \
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FL_SCALE(temp,(y2 - y1),(XMIN - x2),(x1 - x2)); \
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if((y2 -= temp) < YMIN) { WHEN_OUTSIDE; } \
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x2 = XMIN; \
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WHEN_CLIPPED; \
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} \
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if(y1 < YMIN) { \
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FL_SCALE(temp,(x1 - x2),(YMIN - y1),(y2 - y1)); \
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x1 -= temp; \
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y1 = YMIN; \
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WHEN_CLIPPED; \
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} \
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if(y2 > YMAX) { \
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FL_SCALE(temp,(x1 - x2),(y2 - YMAX),(y2 - y1)); \
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x2 += temp; \
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y2 = YMAX; \
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WHEN_CLIPPED; \
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} \
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} \
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} while(0)
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#endif
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