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Clean up a bunch of v_video.c functions that previously exhibited unfortunate side effects when run in non-green resolutions.

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* V_DrawFixedPatch and ilk:
	* Change the offset of V_FLIP so it's not one screen-pixel off where its non-flipped sprite would have started being drawn from.
	* Write to x and y as well as desttop so that anti-screen-overflow checks later in the function behave properly with non-green resolutions.

* V_DrawFill:
	* Reduce number of operations performed upon `c`.

* V_DrawString and ilk:
	* Offset the left and right boundary checks in non-green resolutions such that you can actually draw stuff to the left of basevid screen x coordinate 0.
This commit is contained in:
toaster 2018-08-25 19:52:17 +01:00
parent 9d3aad9036
commit 80ac2366ba
1 changed files with 84 additions and 58 deletions
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142
src/v_video.c
View file

@ -418,7 +418,7 @@ void V_DrawFixedPatch(fixed_t x, fixed_t y, fixed_t pscale, INT32 scrn, patch_t
if (scrn & V_FLIP) if (scrn & V_FLIP)
{ {
flip = true; flip = true;
x -= FixedMul((SHORT(patch->width) - SHORT(patch->leftoffset))<<FRACBITS, pscale); x -= FixedMul((SHORT(patch->width) - SHORT(patch->leftoffset))<<FRACBITS, pscale) + 1;
} }
else else
x -= FixedMul(SHORT(patch->leftoffset)<<FRACBITS, pscale); x -= FixedMul(SHORT(patch->leftoffset)<<FRACBITS, pscale);
@ -446,30 +446,10 @@ void V_DrawFixedPatch(fixed_t x, fixed_t y, fixed_t pscale, INT32 scrn, patch_t
y = FixedMul(y,dupy<<FRACBITS); y = FixedMul(y,dupy<<FRACBITS);
x >>= FRACBITS; x >>= FRACBITS;
y >>= FRACBITS; y >>= FRACBITS;
desttop += (y*vid.width) + x;
// Center it if necessary // Center it if necessary
if (!(scrn & V_SCALEPATCHMASK)) if (!(scrn & V_SCALEPATCHMASK))
{ {
if (vid.width != BASEVIDWIDTH * dupx)
{
// dupx adjustments pretend that screen width is BASEVIDWIDTH * dupx,
// so center this imaginary screen
if (scrn & V_SNAPTORIGHT)
desttop += (vid.width - (BASEVIDWIDTH * dupx));
else if (!(scrn & V_SNAPTOLEFT))
desttop += (vid.width - (BASEVIDWIDTH * dupx)) / 2;
}
if (vid.height != BASEVIDHEIGHT * dupy)
{
// same thing here
if ((scrn & (V_SPLITSCREEN|V_SNAPTOBOTTOM)) == (V_SPLITSCREEN|V_SNAPTOBOTTOM))
desttop += (vid.height/2 - (BASEVIDHEIGHT/2 * dupy)) * vid.width;
else if (scrn & V_SNAPTOBOTTOM)
desttop += (vid.height - (BASEVIDHEIGHT * dupy)) * vid.width;
else if (!(scrn & V_SNAPTOTOP))
desttop += (vid.height - (BASEVIDHEIGHT * dupy)) * vid.width / 2;
}
// if it's meant to cover the whole screen, black out the rest // if it's meant to cover the whole screen, black out the rest
if (x == 0 && SHORT(patch->width) == BASEVIDWIDTH && y == 0 && SHORT(patch->height) == BASEVIDHEIGHT) if (x == 0 && SHORT(patch->width) == BASEVIDWIDTH && y == 0 && SHORT(patch->height) == BASEVIDHEIGHT)
{ {
@ -477,6 +457,27 @@ void V_DrawFixedPatch(fixed_t x, fixed_t y, fixed_t pscale, INT32 scrn, patch_t
source = (const UINT8 *)(column) + 3; source = (const UINT8 *)(column) + 3;
V_DrawFill(0, 0, BASEVIDWIDTH, BASEVIDHEIGHT, (column->topdelta == 0xff ? 31 : source[0])); V_DrawFill(0, 0, BASEVIDWIDTH, BASEVIDHEIGHT, (column->topdelta == 0xff ? 31 : source[0]));
} }
if (vid.width != BASEVIDWIDTH * dupx)
{
// dupx adjustments pretend that screen width is BASEVIDWIDTH * dupx,
// so center this imaginary screen
if (scrn & V_SNAPTORIGHT)
x += (vid.width - (BASEVIDWIDTH * dupx));
else if (!(scrn & V_SNAPTOLEFT))
x += (vid.width - (BASEVIDWIDTH * dupx)) / 2;
}
if (vid.height != BASEVIDHEIGHT * dupy)
{
// same thing here
if ((scrn & (V_SPLITSCREEN|V_SNAPTOBOTTOM)) == (V_SPLITSCREEN|V_SNAPTOBOTTOM))
y += (vid.height/2 - (BASEVIDHEIGHT/2 * dupy)) * vid.width;
else if (scrn & V_SNAPTOBOTTOM)
y += (vid.height - (BASEVIDHEIGHT * dupy));
else if (!(scrn & V_SNAPTOTOP))
y += (vid.height - (BASEVIDHEIGHT * dupy)) / 2;
}
desttop += (y*vid.width) + x;
} }
} }
@ -583,28 +584,10 @@ void V_DrawCroppedPatch(fixed_t x, fixed_t y, fixed_t pscale, INT32 scrn, patch_
y = FixedMul(y,dupy<<FRACBITS); y = FixedMul(y,dupy<<FRACBITS);
x >>= FRACBITS; x >>= FRACBITS;
y >>= FRACBITS; y >>= FRACBITS;
desttop += (y*vid.width) + x;
// Center it if necessary // Center it if necessary
if (!(scrn & V_SCALEPATCHMASK)) if (!(scrn & V_SCALEPATCHMASK))
{ {
if (vid.width != BASEVIDWIDTH * dupx)
{
// dupx adjustments pretend that screen width is BASEVIDWIDTH * dupx,
// so center this imaginary screen
if (scrn & V_SNAPTORIGHT)
desttop += (vid.width - (BASEVIDWIDTH * dupx));
else if (!(scrn & V_SNAPTOLEFT))
desttop += (vid.width - (BASEVIDWIDTH * dupx)) / 2;
}
if (vid.height != BASEVIDHEIGHT * dupy)
{
// same thing here
if (scrn & V_SNAPTOBOTTOM)
desttop += (vid.height - (BASEVIDHEIGHT * dupy)) * vid.width;
else if (!(scrn & V_SNAPTOTOP))
desttop += (vid.height - (BASEVIDHEIGHT * dupy)) * vid.width / 2;
}
// if it's meant to cover the whole screen, black out the rest // if it's meant to cover the whole screen, black out the rest
if (x == 0 && SHORT(patch->width) == BASEVIDWIDTH && y == 0 && SHORT(patch->height) == BASEVIDHEIGHT) if (x == 0 && SHORT(patch->width) == BASEVIDWIDTH && y == 0 && SHORT(patch->height) == BASEVIDHEIGHT)
{ {
@ -612,7 +595,26 @@ void V_DrawCroppedPatch(fixed_t x, fixed_t y, fixed_t pscale, INT32 scrn, patch_
source = (const UINT8 *)(column) + 3; source = (const UINT8 *)(column) + 3;
V_DrawFill(0, 0, BASEVIDWIDTH, BASEVIDHEIGHT, (column->topdelta == 0xff ? 31 : source[0])); V_DrawFill(0, 0, BASEVIDWIDTH, BASEVIDHEIGHT, (column->topdelta == 0xff ? 31 : source[0]));
} }
if (vid.width != BASEVIDWIDTH * dupx)
{
// dupx adjustments pretend that screen width is BASEVIDWIDTH * dupx,
// so center this imaginary screen
if (scrn & V_SNAPTORIGHT)
x += (vid.width - (BASEVIDWIDTH * dupx));
else if (!(scrn & V_SNAPTOLEFT))
x += (vid.width - (BASEVIDWIDTH * dupx)) / 2;
}
if (vid.height != BASEVIDHEIGHT * dupy)
{
// same thing here
if (scrn & V_SNAPTOBOTTOM)
y += (vid.height - (BASEVIDHEIGHT * dupy));
else if (!(scrn & V_SNAPTOTOP))
y += (vid.height - (BASEVIDHEIGHT * dupy)) / 2;
}
} }
desttop += (y*vid.width) + x;
} }
for (col = sx<<FRACBITS; (col>>FRACBITS) < SHORT(patch->width) && (col>>FRACBITS) < w; col += colfrac, ++x, desttop++) for (col = sx<<FRACBITS; (col>>FRACBITS) < SHORT(patch->width) && (col>>FRACBITS) < w; col += colfrac, ++x, desttop++)
@ -776,7 +778,7 @@ void V_DrawFill(INT32 x, INT32 y, INT32 w, INT32 h, INT32 c)
if (x == 0 && y == 0 && w == BASEVIDWIDTH && h == BASEVIDHEIGHT) if (x == 0 && y == 0 && w == BASEVIDWIDTH && h == BASEVIDHEIGHT)
{ // Clear the entire screen, from dest to deststop. Yes, this really works. { // Clear the entire screen, from dest to deststop. Yes, this really works.
memset(screens[0], (UINT8)(c&255), vid.width * vid.height * vid.bpp); memset(screens[0], (c&255), vid.width * vid.height * vid.bpp);
return; return;
} }
@ -831,7 +833,7 @@ void V_DrawFill(INT32 x, INT32 y, INT32 w, INT32 h, INT32 c)
c &= 255; c &= 255;
for (;(--h >= 0) && dest < deststop; dest += vid.width) for (;(--h >= 0) && dest < deststop; dest += vid.width)
memset(dest, (UINT8)(c&255), w * vid.bpp); memset(dest, c, w * vid.bpp);
} }
// //
@ -1129,7 +1131,7 @@ char *V_WordWrap(INT32 x, INT32 w, INT32 option, const char *string)
// //
void V_DrawString(INT32 x, INT32 y, INT32 option, const char *string) void V_DrawString(INT32 x, INT32 y, INT32 option, const char *string)
{ {
INT32 w, c, cx = x, cy = y, dupx, dupy, scrwidth = BASEVIDWIDTH, center = 0; INT32 w, c, cx = x, cy = y, dupx, dupy, scrwidth, center = 0, left = 0;
const char *ch = string; const char *ch = string;
INT32 charflags = 0; INT32 charflags = 0;
const UINT8 *colormap = NULL; const UINT8 *colormap = NULL;
@ -1145,7 +1147,12 @@ void V_DrawString(INT32 x, INT32 y, INT32 option, const char *string)
scrwidth = vid.width; scrwidth = vid.width;
} }
else else
{
dupx = dupy = 1; dupx = dupy = 1;
scrwidth = vid.width/vid.dupx;
left = (scrwidth - BASEVIDWIDTH)/2;
scrwidth -= left;
}
charflags = (option & V_CHARCOLORMASK); charflags = (option & V_CHARCOLORMASK);
@ -1206,9 +1213,9 @@ void V_DrawString(INT32 x, INT32 y, INT32 option, const char *string)
else else
w = SHORT(hu_font[c]->width) * dupx; w = SHORT(hu_font[c]->width) * dupx;
if (cx + w > scrwidth) if (cx > scrwidth)
break; break;
if (cx < 0) //left boundary check if (cx+left + w < 0) //left boundary check
{ {
cx += w; cx += w;
continue; continue;
@ -1239,7 +1246,7 @@ void V_DrawRightAlignedString(INT32 x, INT32 y, INT32 option, const char *string
// //
void V_DrawSmallString(INT32 x, INT32 y, INT32 option, const char *string) void V_DrawSmallString(INT32 x, INT32 y, INT32 option, const char *string)
{ {
INT32 w, c, cx = x, cy = y, dupx, dupy, scrwidth = BASEVIDWIDTH, center = 0; INT32 w, c, cx = x, cy = y, dupx, dupy, scrwidth, center = 0, left = 0;
const char *ch = string; const char *ch = string;
INT32 charflags = 0; INT32 charflags = 0;
const UINT8 *colormap = NULL; const UINT8 *colormap = NULL;
@ -1255,7 +1262,12 @@ void V_DrawSmallString(INT32 x, INT32 y, INT32 option, const char *string)
scrwidth = vid.width; scrwidth = vid.width;
} }
else else
{
dupx = dupy = 1; dupx = dupy = 1;
scrwidth = vid.width/vid.dupx;
left = (scrwidth - BASEVIDWIDTH)/2;
scrwidth -= left;
}
charflags = (option & V_CHARCOLORMASK); charflags = (option & V_CHARCOLORMASK);
@ -1314,9 +1326,9 @@ void V_DrawSmallString(INT32 x, INT32 y, INT32 option, const char *string)
} }
else else
w = SHORT(hu_font[c]->width) * dupx / 2; w = SHORT(hu_font[c]->width) * dupx / 2;
if (cx + w > scrwidth) if (cx > scrwidth)
break; break;
if (cx < 0) //left boundary check if (cx+left + w < 0) //left boundary check
{ {
cx += w; cx += w;
continue; continue;
@ -1341,7 +1353,7 @@ void V_DrawRightAlignedSmallString(INT32 x, INT32 y, INT32 option, const char *s
// //
void V_DrawThinString(INT32 x, INT32 y, INT32 option, const char *string) void V_DrawThinString(INT32 x, INT32 y, INT32 option, const char *string)
{ {
INT32 w, c, cx = x, cy = y, dupx, dupy, scrwidth = BASEVIDWIDTH; INT32 w, c, cx = x, cy = y, dupx, dupy, scrwidth, left = 0;
const char *ch = string; const char *ch = string;
INT32 charflags = 0; INT32 charflags = 0;
const UINT8 *colormap = NULL; const UINT8 *colormap = NULL;
@ -1357,7 +1369,12 @@ void V_DrawThinString(INT32 x, INT32 y, INT32 option, const char *string)
scrwidth = vid.width; scrwidth = vid.width;
} }
else else
{
dupx = dupy = 1; dupx = dupy = 1;
scrwidth = vid.width/vid.dupx;
left = (scrwidth - BASEVIDWIDTH)/2;
scrwidth -= left;
}
charflags = (option & V_CHARCOLORMASK); charflags = (option & V_CHARCOLORMASK);
@ -1414,9 +1431,9 @@ void V_DrawThinString(INT32 x, INT32 y, INT32 option, const char *string)
else else
w = (SHORT(tny_font[c]->width) * dupx); w = (SHORT(tny_font[c]->width) * dupx);
if (cx + w > scrwidth) if (cx > scrwidth)
break; break;
if (cx < 0) //left boundary check if (cx+left + w < 0) //left boundary check
{ {
cx += w; cx += w;
continue; continue;
@ -1439,7 +1456,7 @@ void V_DrawRightAlignedThinString(INT32 x, INT32 y, INT32 option, const char *st
void V_DrawStringAtFixed(fixed_t x, fixed_t y, INT32 option, const char *string) void V_DrawStringAtFixed(fixed_t x, fixed_t y, INT32 option, const char *string)
{ {
fixed_t cx = x, cy = y; fixed_t cx = x, cy = y;
INT32 w, c, dupx, dupy, scrwidth = BASEVIDWIDTH, center = 0; INT32 w, c, dupx, dupy, scrwidth, center = 0, left = 0;
const char *ch = string; const char *ch = string;
INT32 spacewidth = 4, charwidth = 0; INT32 spacewidth = 4, charwidth = 0;
@ -1453,7 +1470,12 @@ void V_DrawStringAtFixed(fixed_t x, fixed_t y, INT32 option, const char *string)
scrwidth = vid.width; scrwidth = vid.width;
} }
else else
{
dupx = dupy = 1; dupx = dupy = 1;
scrwidth = vid.width/vid.dupx;
left = (scrwidth - BASEVIDWIDTH)/2;
scrwidth -= left;
}
switch (option & V_SPACINGMASK) switch (option & V_SPACINGMASK)
{ {
@ -1507,9 +1529,9 @@ void V_DrawStringAtFixed(fixed_t x, fixed_t y, INT32 option, const char *string)
else else
w = SHORT(hu_font[c]->width) * dupx; w = SHORT(hu_font[c]->width) * dupx;
if ((cx>>FRACBITS) + w > scrwidth) if ((cx>>FRACBITS) > scrwidth)
break; break;
if (cx < 0) //left boundary check if ((cx>>FRACBITS)+left + w < 0) //left boundary check
{ {
cx += w<<FRACBITS; cx += w<<FRACBITS;
continue; continue;
@ -1609,7 +1631,7 @@ void V_DrawCreditString(fixed_t x, fixed_t y, INT32 option, const char *string)
} }
w = SHORT(cred_font[c]->width) * dupx; w = SHORT(cred_font[c]->width) * dupx;
if ((cx>>FRACBITS) + w > scrwidth) if ((cx>>FRACBITS) > scrwidth)
break; break;
V_DrawSciencePatch(cx, cy, option, cred_font[c], FRACUNIT); V_DrawSciencePatch(cx, cy, option, cred_font[c], FRACUNIT);
@ -1645,7 +1667,7 @@ INT32 V_CreditStringWidth(const char *string)
// //
void V_DrawLevelTitle(INT32 x, INT32 y, INT32 option, const char *string) void V_DrawLevelTitle(INT32 x, INT32 y, INT32 option, const char *string)
{ {
INT32 w, c, cx = x, cy = y, dupx, dupy, scrwidth = BASEVIDWIDTH; INT32 w, c, cx = x, cy = y, dupx, dupy, scrwidth, left = 0;
const char *ch = string; const char *ch = string;
if (option & V_NOSCALESTART) if (option & V_NOSCALESTART)
@ -1655,7 +1677,12 @@ void V_DrawLevelTitle(INT32 x, INT32 y, INT32 option, const char *string)
scrwidth = vid.width; scrwidth = vid.width;
} }
else else
{
dupx = dupy = 1; dupx = dupy = 1;
scrwidth = vid.width/vid.dupx;
left = (scrwidth - BASEVIDWIDTH)/2;
scrwidth -= left;
}
for (;;) for (;;)
{ {
@ -1677,11 +1704,10 @@ void V_DrawLevelTitle(INT32 x, INT32 y, INT32 option, const char *string)
} }
w = SHORT(lt_font[c]->width) * dupx; w = SHORT(lt_font[c]->width) * dupx;
if (cx + w > scrwidth) if (cx > scrwidth)
break; break;
if (cx+left + w < 0) //left boundary check
//left boundary check
if (cx < 0)
{ {
cx += w; cx += w;
continue; continue;