97 lines
2.2 KiB
C++
97 lines
2.2 KiB
C++
/*
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THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
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SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
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END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
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ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
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IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
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SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
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FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
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CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
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AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
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COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
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*/
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/*
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*
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* Graphical routines for drawing solid scanlines.
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*
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*/
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#include <string.h>
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#include "gr.h"
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#include "grdef.h"
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static void gr_linear_darken(ubyte * dest, int darkening_level, int count, ubyte * fade_table) {
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register int i;
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for (i=0;i<count;i++)
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{
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*dest = fade_table[(*dest)+(darkening_level*256)];
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dest++;
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}
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}
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static void gr_linear_stosd( ubyte * dest, unsigned char color, unsigned int nbytes) {
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memset(dest,color,nbytes);
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}
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void gr_uscanline( int x1, int x2, int y )
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{
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if (grd_curcanv->cv_fade_level >= GR_FADE_OFF) {
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switch(TYPE)
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{
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case BM_LINEAR:
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#ifdef OGL
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case BM_OGL:
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#endif
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gr_linear_stosd( DATA + ROWSIZE*y + x1, (unsigned char)COLOR, x2-x1+1);
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break;
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}
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} else {
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switch(TYPE)
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{
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case BM_LINEAR:
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#ifdef OGL
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case BM_OGL:
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#endif
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gr_linear_darken( DATA + ROWSIZE*y + x1, grd_curcanv->cv_fade_level, x2-x1+1, gr_fade_table);
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break;
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}
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}
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}
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void gr_scanline( int x1, int x2, int y )
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{
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if ((y<0)||(y>MAXY)) return;
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if (x2 < x1 ) x2 ^= x1 ^= x2;
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if (x1 > MAXX) return;
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if (x2 < MINX) return;
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if (x1 < MINX) x1 = MINX;
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if (x2 > MAXX) x2 = MAXX;
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if (grd_curcanv->cv_fade_level >= GR_FADE_OFF) {
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switch(TYPE)
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{
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case BM_LINEAR:
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#ifdef OGL
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case BM_OGL:
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#endif
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gr_linear_stosd( DATA + ROWSIZE*y + x1, (unsigned char)COLOR, x2-x1+1);
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break;
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}
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} else {
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switch(TYPE)
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{
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case BM_LINEAR:
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#ifdef OGL
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case BM_OGL:
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#endif
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gr_linear_darken( DATA + ROWSIZE*y + x1, grd_curcanv->cv_fade_level, x2-x1+1, gr_fade_table);
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break;
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}
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}
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}
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