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Optimise pixel drawing

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This commit is contained in:
Jaime Passos 2020-01-26 22:52:15 -03:00
parent d08929b3d7
commit ba6018aea4
1 changed files with 14 additions and 6 deletions
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20
src/am_map.c
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@ -205,6 +205,7 @@ static boolean followplayer = true; // specifies whether to follow the player ar
typedef void (*AMDRAWFLINEFUNC) (const fline_t *fl, INT32 color);
static AMDRAWFLINEFUNC AM_drawFline;
static void AM_drawPixel(INT32 xx, INT32 yy, INT32 cc);
static void AM_drawFline_soft(const fline_t *fl, INT32 color);
static void AM_activateNewScale(void)
@ -712,6 +713,17 @@ static boolean AM_clipMline(const mline_t *ml, fline_t *fl)
}
#undef DOOUTCODE
//
// Draws a pixel.
//
static void AM_drawPixel(INT32 xx, INT32 yy, INT32 cc)
{
UINT8 *dest = screens[0];
if (xx < 0 || yy < 0 || xx >= vid.width || yy >= vid.height)
return; // off the screen
dest[(yy*vid.rowbytes) + (xx * vid.bpp)] = (cc & 0xFF);
}
//
// Classic Bresenham w/ whatever optimizations needed for speed
//
@ -733,8 +745,6 @@ static void AM_drawFline_soft(const fline_t *fl, INT32 color)
}
#endif
#define PUTDOT(xx,yy,cc) V_DrawFill(xx,yy,1,1,cc|V_NOSCALESTART);
dx = fl->b.x - fl->a.x;
ax = 2 * (dx < 0 ? -dx : dx);
sx = dx < 0 ? -1 : 1;
@ -751,7 +761,7 @@ static void AM_drawFline_soft(const fline_t *fl, INT32 color)
d = ay - ax/2;
for (;;)
{
PUTDOT(x, y, color)
AM_drawPixel(x, y, color);
if (x == fl->b.x)
return;
if (d >= 0)
@ -768,7 +778,7 @@ static void AM_drawFline_soft(const fline_t *fl, INT32 color)
d = ax - ay/2;
for (;;)
{
PUTDOT(x, y, color)
AM_drawPixel(x, y, color);
if (y == fl->b.y)
return;
if (d >= 0)
@ -780,8 +790,6 @@ static void AM_drawFline_soft(const fline_t *fl, INT32 color)
d += ax;
}
}
#undef PUTDOT
}
//