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/*
* Descent 3
* Copyright (C) 2024 Parallax Software
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
--- HISTORICAL COMMENTS FOLLOW ---
* $Logfile: /DescentIII/Main/2dlib/pen.cpp $
* $Revision: 5 $
* $Date: 12/19/97 5:28p $
* $Author: Samir $
*
* line and rectangle drawing
*
* $Log: /DescentIII/Main/2dlib/pen.cpp $
*
* 5 12/19/97 5:28p Samir
* Took out old rasterization code. Moved to renderer library.
*
* 4 12/19/97 5:23p Samir
* Cleaned up a lot of code to call renderer code.
*
* 3 12/19/97 12:31p Samir
* Better renderer support.
*
* 21 6/16/97 4:45p Samir
* Added rendering line hooks.
*
* 20 6/12/97 6:29p Samir
*
* 19 6/06/97 12:18p Samir
* OpenGL HACKS to call renderer for some drawing functions. Must fix.
*
* 18 5/29/97 5:59p Samir
* Convert clipping from fix math to float math.
*
* 17 4/11/97 3:56 PM Jeremy
* replaced calls of ddgr_H/Vline to gr_h/vline
*
* 16 4/08/97 12:53p Samir
* Fixed hline clipping fuckup.
*
* 15 4/08/97 11:30a Jason
* made circles not draw if they are touching the edge ofthe viewport
*
* 14 4/08/97 10:42a Jason
* fixed bug with hline
*
* 13 4/01/97 4:37p Samir
* Simply better circle functions using viewport line and pixel functions.
* made an hline function that clips and a setpixel function that clips.
*
* 12 4/01/97 3:56p Samir
* Cheap clipping for scanlines. Should fix this so it's cleaner.
*
* 11 4/01/97 1:51p Samir
* Fixed clipping of circles.
*
* 10 4/01/97 1:40p Samir
* Circle functions
*
* 9 3/27/97 11:11a Samir
* Moved code from ddgr library to 2dlib because it was ANSI compliant and
* should work on all systems
*
* 8 2/28/97 2:52 PM Jeremy
* removed inline declaration of grViewport::clip_line
*
* 7 2/27/97 6:14p Samir
* moved higher level ddgr pen code to this library.
*
* 6 2/07/97 6:04p Matt
* Renamed vm_FixMulDiv() to FixMulDiv()
*
* 5 2/04/97 11:14a Samir
* Improved clipping system by adding a separate clipport based off of the
* viewport's rectangle in it's parent surface
*
* $NoKeywords: $
*/
#include "lib2d.h"
#include "pserror.h"
#define CLIP_LEFT (vp_InitLeft + vp_Left)
#define CLIP_TOP (vp_InitTop + vp_Top)
#define CLIP_RIGHT (vp_InitLeft + vp_Right)
#define CLIP_BOTTOM (vp_InitTop + vp_Bottom)
void grViewport::hline(ddgr_color col, int x1, int x2, int y1) {
ASSERT(vp_Locked);
x1 = global_x(x1);
y1 = global_y(y1);
x2 = global_x(x2);
if (x1 > x2) {
int t = x2;
x2 = x1;
x1 = t;
}
if (y1 < CLIP_TOP)
return;
if (y1 > CLIP_BOTTOM)
return;
if (x1 > CLIP_RIGHT)
return;
if (x2 < CLIP_LEFT)
return;
if (x1 < CLIP_LEFT)
x1 = CLIP_LEFT;
if (x2 > CLIP_RIGHT)
x2 = CLIP_RIGHT;
rend_SetFlatColor(col);
rend_DrawLine(x1, y1, x2, y1);
}
// grViewport::line
// draws a clipped line
void grViewport::line(ddgr_color color, int x1, int y1, int x2, int y2) {
int xa, ya, xb, yb;
ASSERT(vp_Locked);
xa = global_x(x1);
ya = global_y(y1);
xb = global_x(x2);
yb = global_y(y2);
rend_SetFlatColor(color);
rend_DrawLine(x1, y1, x2, y2);
}
void grViewport::rect(ddgr_color color, int l, int t, int r, int b) {
ASSERT(vp_Locked);
l = global_x(l);
t = global_y(t);
r = global_x(r);
b = global_y(b);
rend_SetFlatColor(color);
rend_DrawLine(l, t, r, t);
rend_DrawLine(r, t, r, b);
rend_DrawLine(l, b, r, b);
rend_DrawLine(l, t, l, b);
}
void grViewport::fillrect(ddgr_color color, int l, int t, int r, int b) {
ASSERT(vp_Locked);
l = global_x(l);
t = global_y(t);
r = global_x(r);
b = global_y(b);
rend_FillRect(color, l, t, r, b);
}
void grViewport::circle(ddgr_color col, int xc, int yc, int r) {
ASSERT(vp_Locked);
xc = global_x(xc);
yc = global_y(yc);
rend_SetFlatColor(col);
rend_DrawCircle(xc, yc, r);
}
void grViewport::fillcircle(ddgr_color col, int xc, int yc, int r) {
ASSERT(vp_Locked);
xc = global_x(xc);
yc = global_y(yc);
rend_FillCircle(col, xc, yc, r);
}
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