forked from KolibriOS/kolibrios
471 lines
11 KiB
C++
Executable File
471 lines
11 KiB
C++
Executable File
#include "wl_def.h"
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pictabletype *pictable;
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SDL_Surface *latchpics[NUMLATCHPICS];
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int px,py;
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byte fontcolor,backcolor;
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int fontnumber;
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//==========================================================================
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void VWB_DrawPropString(const char* string)
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{
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fontstruct *font;
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int width, step, height;
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byte *source, *dest;
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byte ch;
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int i;
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unsigned sx, sy;
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byte *vbuf = VL_LockSurface(curSurface);
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if(vbuf == NULL) return;
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font = (fontstruct *) grsegs[STARTFONT+fontnumber];
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height = font->height;
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dest = vbuf + scaleFactor * (py * curPitch + px);
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while ((ch = (byte)*string++)!=0)
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{
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width = step = font->width[ch];
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source = ((byte *)font)+font->location[ch];
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while (width--)
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{
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for(i=0; i<height; i++)
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{
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if(source[i*step])
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{
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for(sy=0; sy<scaleFactor; sy++)
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for(sx=0; sx<scaleFactor; sx++)
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dest[(scaleFactor*i+sy)*curPitch+sx]=fontcolor;
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}
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}
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source++;
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px++;
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dest+=scaleFactor;
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}
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}
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VL_UnlockSurface(curSurface);
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}
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/*
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=================
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=
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= VL_MungePic
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=
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=================
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*/
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void VL_MungePic (byte *source, unsigned width, unsigned height)
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{
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unsigned x,y,plane,size,pwidth;
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byte *temp, *dest, *srcline;
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size = width*height;
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if (width&3)
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Quit ("VL_MungePic: Not divisable by 4!");
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//
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// copy the pic to a temp buffer
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//
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temp=(byte *) malloc(size);
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CHECKMALLOCRESULT(temp);
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memcpy (temp,source,size);
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//
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// munge it back into the original buffer
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//
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dest = source;
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pwidth = width/4;
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for (plane=0;plane<4;plane++)
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{
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srcline = temp;
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for (y=0;y<height;y++)
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{
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for (x=0;x<pwidth;x++)
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*dest++ = *(srcline+x*4+plane);
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srcline+=width;
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}
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}
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free(temp);
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}
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void VWL_MeasureString (const char *string, word *width, word *height, fontstruct *font)
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{
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*height = font->height;
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for (*width = 0;*string;string++)
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*width += font->width[*((byte *)string)]; // proportional width
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}
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void VW_MeasurePropString (const char *string, word *width, word *height)
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{
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VWL_MeasureString(string,width,height,(fontstruct *)grsegs[STARTFONT+fontnumber]);
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}
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/*
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=============================================================================
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Double buffer management routines
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=============================================================================
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*/
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void VH_UpdateScreen()
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{
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SDL_BlitSurface(screenBuffer, NULL, screen, NULL);
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SDL_Flip(screen);
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}
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void VWB_DrawTile8 (int x, int y, int tile)
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{
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LatchDrawChar(x,y,tile);
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}
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void VWB_DrawTile8M (int x, int y, int tile)
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{
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VL_MemToScreen (((byte *)grsegs[STARTTILE8M])+tile*64,8,8,x,y);
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}
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void VWB_DrawPic (int x, int y, int chunknum)
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{
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int picnum = chunknum - STARTPICS;
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unsigned width,height;
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x &= ~7;
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width = pictable[picnum].width;
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height = pictable[picnum].height;
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VL_MemToScreen (grsegs[chunknum],width,height,x,y);
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}
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void VWB_DrawPicScaledCoord (int scx, int scy, int chunknum)
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{
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int picnum = chunknum - STARTPICS;
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unsigned width,height;
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width = pictable[picnum].width;
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height = pictable[picnum].height;
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VL_MemToScreenScaledCoord (grsegs[chunknum],width,height,scx,scy);
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}
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void VWB_Bar (int x, int y, int width, int height, int color)
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{
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VW_Bar (x,y,width,height,color);
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}
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void VWB_Plot (int x, int y, int color)
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{
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if(scaleFactor == 1)
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VW_Plot(x,y,color);
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else
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VW_Bar(x, y, 1, 1, color);
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}
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void VWB_Hlin (int x1, int x2, int y, int color)
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{
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if(scaleFactor == 1)
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VW_Hlin(x1,x2,y,color);
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else
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VW_Bar(x1, y, x2-x1+1, 1, color);
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}
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void VWB_Vlin (int y1, int y2, int x, int color)
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{
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if(scaleFactor == 1)
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VW_Vlin(y1,y2,x,color);
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else
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VW_Bar(x, y1, 1, y2-y1+1, color);
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}
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/*
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=============================================================================
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WOLFENSTEIN STUFF
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=============================================================================
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*/
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/*
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=====================
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=
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= LatchDrawPic
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=
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=====================
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*/
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void LatchDrawPic (unsigned x, unsigned y, unsigned picnum)
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{
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VL_LatchToScreen (latchpics[2+picnum-LATCHPICS_LUMP_START], x*8, y);
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}
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void LatchDrawPicScaledCoord (unsigned scx, unsigned scy, unsigned picnum)
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{
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VL_LatchToScreenScaledCoord (latchpics[2+picnum-LATCHPICS_LUMP_START], scx*8, scy);
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}
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//==========================================================================
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void FreeLatchMem()
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{
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int i;
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for(i = 0; i < 2 + LATCHPICS_LUMP_END - LATCHPICS_LUMP_START; i++)
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{
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SDL_FreeSurface(latchpics[i]);
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latchpics[i] = NULL;
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}
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}
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/*
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===================
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=
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= LoadLatchMem
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=
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===================
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*/
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void LoadLatchMem (void)
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{
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int i,width,height,start,end;
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byte *src;
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SDL_Surface *surf;
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//
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// tile 8s
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//
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surf = SDL_CreateRGBSurface(SDL_HWSURFACE, 8*8,
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((NUMTILE8 + 7) / 8) * 8, 8, 0, 0, 0, 0);
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if(surf == NULL)
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{
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Quit("Unable to create surface for tiles!");
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}
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SDL_SetColors(surf, gamepal, 0, 256);
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latchpics[0] = surf;
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CA_CacheGrChunk (STARTTILE8);
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src = grsegs[STARTTILE8];
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for (i=0;i<NUMTILE8;i++)
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{
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VL_MemToLatch (src, 8, 8, surf, (i & 7) * 8, (i >> 3) * 8);
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src += 64;
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}
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UNCACHEGRCHUNK (STARTTILE8);
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latchpics[1] = NULL; // not used
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//
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// pics
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//
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start = LATCHPICS_LUMP_START;
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end = LATCHPICS_LUMP_END;
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for (i=start;i<=end;i++)
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{
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width = pictable[i-STARTPICS].width;
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height = pictable[i-STARTPICS].height;
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surf = SDL_CreateRGBSurface(SDL_HWSURFACE, width, height, 8, 0, 0, 0, 0);
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if(surf == NULL)
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{
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Quit("Unable to create surface for picture!");
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}
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SDL_SetColors(surf, gamepal, 0, 256);
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latchpics[2+i-start] = surf;
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CA_CacheGrChunk (i);
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VL_MemToLatch (grsegs[i], width, height, surf, 0, 0);
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UNCACHEGRCHUNK(i);
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}
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}
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//==========================================================================
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/*
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===================
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=
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= FizzleFade
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=
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= returns true if aborted
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=
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= It uses maximum-length Linear Feedback Shift Registers (LFSR) counters.
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= You can find a list of them with lengths from 3 to 168 at:
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= http://www.xilinx.com/support/documentation/application_notes/xapp052.pdf
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= Many thanks to Xilinx for this list!!!
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=
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===================
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*/
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// XOR masks for the pseudo-random number sequence starting with n=17 bits
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static const uint32_t rndmasks[] = {
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// n XNOR from (starting at 1, not 0 as usual)
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0x00012000, // 17 17,14
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0x00020400, // 18 18,11
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0x00040023, // 19 19,6,2,1
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0x00090000, // 20 20,17
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0x00140000, // 21 21,19
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0x00300000, // 22 22,21
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0x00420000, // 23 23,18
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0x00e10000, // 24 24,23,22,17
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0x01200000, // 25 25,22 (this is enough for 8191x4095)
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};
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static unsigned int rndbits_y;
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static unsigned int rndmask;
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extern SDL_Color curpal[256];
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// Returns the number of bits needed to represent the given value
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static int log2_ceil(uint32_t x)
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{
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int n = 0;
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uint32_t v = 1;
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while(v < x)
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{
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n++;
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v <<= 1;
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}
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return n;
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}
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void VH_Startup()
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{
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int rndbits_x = log2_ceil(screenWidth);
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rndbits_y = log2_ceil(screenHeight);
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int rndbits = rndbits_x + rndbits_y;
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if(rndbits < 17)
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rndbits = 17; // no problem, just a bit slower
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else if(rndbits > 25)
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rndbits = 25; // fizzle fade will not fill whole screen
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rndmask = rndmasks[rndbits - 17];
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}
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boolean FizzleFade (SDL_Surface *source, int x1, int y1,
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unsigned width, unsigned height, unsigned frames, boolean abortable)
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{
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unsigned x, y, frame, pixperframe;
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int32_t rndval, lastrndval;
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int first = 1;
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lastrndval = 0;
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pixperframe = width * height / frames;
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IN_StartAck ();
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frame = GetTimeCount();
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byte *srcptr = VL_LockSurface(source);
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if(srcptr == NULL) return false;
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do
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{
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IN_ProcessEvents();
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if(abortable && IN_CheckAck ())
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{
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VL_UnlockSurface(source);
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SDL_BlitSurface(source, NULL, screen, NULL);
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SDL_Flip(screen);
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return true;
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}
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byte *destptr = VL_LockSurface(screen);
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if(destptr != NULL)
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{
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rndval = lastrndval;
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// When using double buffering, we have to copy the pixels of the last AND the current frame.
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// Only for the first frame, there is no "last frame"
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for(int i = first; i < 2; i++)
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{
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for(unsigned p = 0; p < pixperframe; p++)
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{
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//
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// seperate random value into x/y pair
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//
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x = rndval >> rndbits_y;
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y = rndval & ((1 << rndbits_y) - 1);
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//
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// advance to next random element
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//
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rndval = (rndval >> 1) ^ (rndval & 1 ? 0 : rndmask);
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if(x >= width || y >= height)
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{
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if(rndval == 0) // entire sequence has been completed
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goto finished;
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p--;
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continue;
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}
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//
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// copy one pixel
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//
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if(screenBits == 8)
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{
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*(destptr + (y1 + y) * screen->pitch + x1 + x)
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= *(srcptr + (y1 + y) * source->pitch + x1 + x);
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}
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else
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{
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byte col = *(srcptr + (y1 + y) * source->pitch + x1 + x);
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uint32_t fullcol = SDL_MapRGB(screen->format, curpal[col].r, curpal[col].g, curpal[col].b);
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memcpy(destptr + (y1 + y) * screen->pitch + (x1 + x) * screen->format->BytesPerPixel,
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&fullcol, screen->format->BytesPerPixel);
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}
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if(rndval == 0) // entire sequence has been completed
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goto finished;
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}
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if(!i || first) lastrndval = rndval;
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}
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// If there is no double buffering, we always use the "first frame" case
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if(usedoublebuffering) first = 0;
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VL_UnlockSurface(screen);
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SDL_Flip(screen);
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}
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else
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{
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// No surface, so only enhance rndval
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for(int i = first; i < 2; i++)
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{
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for(unsigned p = 0; p < pixperframe; p++)
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{
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rndval = (rndval >> 1) ^ (rndval & 1 ? 0 : rndmask);
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if(rndval == 0)
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goto finished;
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}
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}
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}
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frame++;
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Delay(frame - GetTimeCount()); // don't go too fast
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} while (1);
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finished:
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VL_UnlockSurface(source);
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VL_UnlockSurface(screen);
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SDL_BlitSurface(source, NULL, screen, NULL);
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SDL_Flip(screen);
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return false;
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}
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