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Classic: implement screen tilting by 180 degrees without quality loss.
BUILD_LUNATIC. git-svn-id: https://svn.eduke32.com/eduke32@4364 1a8010ca-5511-0410-912e-c29ae57300e0
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c405a13bbd
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2 changed files with 99 additions and 58 deletions
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@ -2293,6 +2293,14 @@ void copybufreverse(const void *S, void *D, int32_t c);
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#endif
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static inline void swapbufreverse(void *s, void *d, int32_t c)
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{
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uint8_t *src = (uint8_t*)s, *dst = (uint8_t*)d;
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while (c--) {
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swapchar(dst++, src--);
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}
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}
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#ifdef EXTERNC
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}
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#endif
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@ -4418,7 +4418,7 @@ void G_DrawRooms(int32_t snum, int32_t smoothratio)
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int32_t tiltcx, tiltcy, tiltcs=0; // JBF 20030807
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const int32_t vr = divscale22(1,sprite[p->i].yrepeat+28);
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const int32_t software_screen_tilting =
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int32_t software_screen_tilting =
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(getrendermode() == REND_CLASSIC && ((ud.screen_tilting && p->rotscrnang
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#ifdef SPLITSCREEN_MOD_HACKS
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&& !g_fakeMultiMode
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@ -4452,6 +4452,12 @@ void G_DrawRooms(int32_t snum, int32_t smoothratio)
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int32_t oviewingrange = viewingrange; // save it from setaspect()
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const int16_t tang = (ud.screen_tilting) ? p->rotscrnang : 0;
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if (tang == 1024)
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{
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software_screen_tilting = 2;
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}
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else
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{
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// To render a tilted screen in high quality, we need at least
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// 640 pixels of *Y* dimension.
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#if MAXYDIM >= 640
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@ -4508,6 +4514,7 @@ void G_DrawRooms(int32_t snum, int32_t smoothratio)
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tmpvr = i>>1;
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tmpyx = (65536*ydim*8)/(xdim*5);
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}
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}
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else if (getrendermode() >= REND_POLYMOST && (ud.screen_tilting
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#ifdef SPLITSCREEN_MOD_HACKS
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&& !g_fakeMultiMode
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@ -4681,6 +4688,31 @@ void G_DrawRooms(int32_t snum, int32_t smoothratio)
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{
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const int16_t tang = (ud.screen_tilting) ? p->rotscrnang : 0;
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if (software_screen_tilting == 2) // tang == 1024
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{
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begindrawing();
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{
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const int32_t height = windowy2-windowy1+1;
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const int32_t width = windowx2-windowx1+1;
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uint8_t *f = (uint8_t *)(frameplace + ylookup[windowy1]);
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int32_t x, y;
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for (y=0; y < (height>>1); y++)
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swapbufreverse(f + y*bytesperline + windowx2,
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f + (height-1-y)*bytesperline + windowx1,
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width);
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f += (height>>1)*bytesperline + windowx1;
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if (height&1)
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for (x=0; x<(width>>1); x++)
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swapchar(&f[x], &f[width-1-x]);
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}
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enddrawing();
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}
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else
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{
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setviewback();
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picanm[TILE_TILT].xofs = picanm[TILE_TILT].yofs = 0;
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@ -4693,6 +4725,7 @@ void G_DrawRooms(int32_t snum, int32_t smoothratio)
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rotatesprite_win(160<<16,100<<16,i,tang+512,TILE_TILT,0,0,4+2+64+1024);
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walock[TILE_TILT] = 199;
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}
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}
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else if (pixelDoubling)
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{
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Bassert(g_halfScreen.xdimen!=0);
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