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Classic: implement screen tilting by 180 degrees without quality loss.

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BUILD_LUNATIC.

git-svn-id: https://svn.eduke32.com/eduke32@4364 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
helixhorned 2014-03-05 21:12:59 +00:00
parent c405a13bbd
commit 73b3199b7c
2 changed files with 99 additions and 58 deletions
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8
polymer/eduke32/build/include/pragmas.h
View file

@ -2293,6 +2293,14 @@ void copybufreverse(const void *S, void *D, int32_t c);
#endif #endif
static inline void swapbufreverse(void *s, void *d, int32_t c)
{
uint8_t *src = (uint8_t*)s, *dst = (uint8_t*)d;
while (c--) {
swapchar(dst++, src--);
}
}
#ifdef EXTERNC #ifdef EXTERNC
} }
#endif #endif

149
polymer/eduke32/source/game.c
View file

@ -4418,7 +4418,7 @@ void G_DrawRooms(int32_t snum, int32_t smoothratio)
int32_t tiltcx, tiltcy, tiltcs=0; // JBF 20030807 int32_t tiltcx, tiltcy, tiltcs=0; // JBF 20030807
const int32_t vr = divscale22(1,sprite[p->i].yrepeat+28); const int32_t vr = divscale22(1,sprite[p->i].yrepeat+28);
const int32_t software_screen_tilting = int32_t software_screen_tilting =
(getrendermode() == REND_CLASSIC && ((ud.screen_tilting && p->rotscrnang (getrendermode() == REND_CLASSIC && ((ud.screen_tilting && p->rotscrnang
#ifdef SPLITSCREEN_MOD_HACKS #ifdef SPLITSCREEN_MOD_HACKS
&& !g_fakeMultiMode && !g_fakeMultiMode
@ -4452,61 +4452,68 @@ void G_DrawRooms(int32_t snum, int32_t smoothratio)
int32_t oviewingrange = viewingrange; // save it from setaspect() int32_t oviewingrange = viewingrange; // save it from setaspect()
const int16_t tang = (ud.screen_tilting) ? p->rotscrnang : 0; const int16_t tang = (ud.screen_tilting) ? p->rotscrnang : 0;
// To render a tilted screen in high quality, we need at least if (tang == 1024)
// 640 pixels of *Y* dimension.
#if MAXYDIM >= 640
if (xres > 320 || yres > 240)
{ {
tiltcs = 2; software_screen_tilting = 2;
tiltcx = 640;
tiltcy = 400;
} }
else else
#endif
{ {
// JBF 20030807: Increased tilted-screen quality // To render a tilted screen in high quality, we need at least
tiltcs = 1; // 640 pixels of *Y* dimension.
tiltcx = 320; #if MAXYDIM >= 640
tiltcy = 200; if (xres > 320 || yres > 240)
}
{
// If the view is rotated (not 0 or 180 degrees modulo 360 degrees),
// we render onto a square tile and display a portion of that
// rotated on-screen later on.
const int32_t viewtilexsiz = (tang&1023) ? tiltcx : tiltcy;
const int32_t viewtileysiz = tiltcx;
walock[TILE_TILT] = 255;
if (waloff[TILE_TILT] == 0)
allocache(&waloff[TILE_TILT], viewtilexsiz*viewtileysiz, &walock[TILE_TILT]);
setviewtotile(TILE_TILT, viewtilexsiz, viewtileysiz);
}
if ((tang&1023) == 512)
{
//Block off unscreen section of 90ø tilted screen
j = tiltcx-(60*tiltcs);
for (i=(60*tiltcs)-1; i>=0; i--)
{ {
startumost[i] = 1; tiltcs = 2;
startumost[i+j] = 1; tiltcx = 640;
startdmost[i] = 0; tiltcy = 400;
startdmost[i+j] = 0;
} }
else
#endif
{
// JBF 20030807: Increased tilted-screen quality
tiltcs = 1;
tiltcx = 320;
tiltcy = 200;
}
{
// If the view is rotated (not 0 or 180 degrees modulo 360 degrees),
// we render onto a square tile and display a portion of that
// rotated on-screen later on.
const int32_t viewtilexsiz = (tang&1023) ? tiltcx : tiltcy;
const int32_t viewtileysiz = tiltcx;
walock[TILE_TILT] = 255;
if (waloff[TILE_TILT] == 0)
allocache(&waloff[TILE_TILT], viewtilexsiz*viewtileysiz, &walock[TILE_TILT]);
setviewtotile(TILE_TILT, viewtilexsiz, viewtileysiz);
}
if ((tang&1023) == 512)
{
//Block off unscreen section of 90ø tilted screen
j = tiltcx-(60*tiltcs);
for (i=(60*tiltcs)-1; i>=0; i--)
{
startumost[i] = 1;
startumost[i+j] = 1;
startdmost[i] = 0;
startdmost[i+j] = 0;
}
}
i = (tang&511);
if (i > 256)
i = 512-i;
i = sintable[i+512]*8 + sintable[i]*5;
// setaspect(i>>1, yxaspect);
setaspect(mulscale16(oviewingrange,i>>1), yxaspect);
tmpvr = i>>1;
tmpyx = (65536*ydim*8)/(xdim*5);
} }
i = (tang&511);
if (i > 256)
i = 512-i;
i = sintable[i+512]*8 + sintable[i]*5;
// setaspect(i>>1, yxaspect);
setaspect(mulscale16(oviewingrange,i>>1), yxaspect);
tmpvr = i>>1;
tmpyx = (65536*ydim*8)/(xdim*5);
} }
else if (getrendermode() >= REND_POLYMOST && (ud.screen_tilting else if (getrendermode() >= REND_POLYMOST && (ud.screen_tilting
#ifdef SPLITSCREEN_MOD_HACKS #ifdef SPLITSCREEN_MOD_HACKS
@ -4681,17 +4688,43 @@ void G_DrawRooms(int32_t snum, int32_t smoothratio)
{ {
const int16_t tang = (ud.screen_tilting) ? p->rotscrnang : 0; const int16_t tang = (ud.screen_tilting) ? p->rotscrnang : 0;
setviewback(); if (software_screen_tilting == 2) // tang == 1024
picanm[TILE_TILT].xofs = picanm[TILE_TILT].yofs = 0; {
begindrawing();
{
const int32_t height = windowy2-windowy1+1;
const int32_t width = windowx2-windowx1+1;
i = (tang&511); uint8_t *f = (uint8_t *)(frameplace + ylookup[windowy1]);
if (i > 256) int32_t x, y;
i = 512-i;
i = sintable[i+512]*8 + sintable[i]*5;
i >>= tiltcs; // JBF 20030807
rotatesprite_win(160<<16,100<<16,i,tang+512,TILE_TILT,0,0,4+2+64+1024); for (y=0; y < (height>>1); y++)
walock[TILE_TILT] = 199; swapbufreverse(f + y*bytesperline + windowx2,
f + (height-1-y)*bytesperline + windowx1,
width);
f += (height>>1)*bytesperline + windowx1;
if (height&1)
for (x=0; x<(width>>1); x++)
swapchar(&f[x], &f[width-1-x]);
}
enddrawing();
}
else
{
setviewback();
picanm[TILE_TILT].xofs = picanm[TILE_TILT].yofs = 0;
i = (tang&511);
if (i > 256)
i = 512-i;
i = sintable[i+512]*8 + sintable[i]*5;
i >>= tiltcs; // JBF 20030807
rotatesprite_win(160<<16,100<<16,i,tang+512,TILE_TILT,0,0,4+2+64+1024);
walock[TILE_TILT] = 199;
}
} }
else if (pixelDoubling) else if (pixelDoubling)
{ {