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- // Emacs style mode select -*- C++ -*-
- //-----------------------------------------------------------------------------
- //
- // $Id:$
- //
- // Copyright (C) 1993-1996 by id Software, Inc.
- //
- // This source is available for distribution and/or modification
- // only under the terms of the DOOM Source Code License as
- // published by id Software. All rights reserved.
- //
- // The source is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
- // for more details.
- //
- // $Log:$
- //
- // DESCRIPTION:
- // Gamma correction LUT stuff.
- // Functions to draw patches (by post) directly to screen.
- // Functions to blit a block to the screen.
- //
- //-----------------------------------------------------------------------------
-
-
- static const char
- rcsid[] = "$Id: v_video.c,v 1.5 1997/02/03 22:45:13 b1 Exp $";
-
- #include <exec/exec.h>
- #include <powerup/clib/ppc_protos.h>
- #include <powerup/ppclib/memory.h>
-
- #include "i_system.h"
- #include "i_video.h"
- #include "r_local.h"
-
- #include "doomdef.h"
- #include "doomstat.h"
- #include "doomdata.h"
-
- #include "m_bbox.h"
- #include "m_swap.h"
- #include "m_argv.h"
- #include "am_map.h"
- #include "r_draw.h"
-
- #include "v_video.h"
-
- #include "st_stuff.h"
-
- // Screen buffer memory
- byte *vid_mem;
-
- // Each screen is [SCREENWIDTH*SCREENHEIGHT];
- byte* screens[5];
-
- int dirtybox[4];
-
-
-
- // Now where did these came from?
- byte gammatable[5][256] =
- {
- {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,
- 17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,
- 33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,
- 49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,
- 65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,
- 81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,
- 97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,
- 113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,
- 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
- 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
- 160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,
- 176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,
- 192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,
- 208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
- 224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,
- 240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255},
-
- {2,4,5,7,8,10,11,12,14,15,16,18,19,20,21,23,24,25,26,27,29,30,31,
- 32,33,34,36,37,38,39,40,41,42,44,45,46,47,48,49,50,51,52,54,55,
- 56,57,58,59,60,61,62,63,64,65,66,67,69,70,71,72,73,74,75,76,77,
- 78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,
- 99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,
- 115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,129,
- 130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,
- 146,147,148,148,149,150,151,152,153,154,155,156,157,158,159,160,
- 161,162,163,163,164,165,166,167,168,169,170,171,172,173,174,175,
- 175,176,177,178,179,180,181,182,183,184,185,186,186,187,188,189,
- 190,191,192,193,194,195,196,196,197,198,199,200,201,202,203,204,
- 205,205,206,207,208,209,210,211,212,213,214,214,215,216,217,218,
- 219,220,221,222,222,223,224,225,226,227,228,229,230,230,231,232,
- 233,234,235,236,237,237,238,239,240,241,242,243,244,245,245,246,
- 247,248,249,250,251,252,252,253,254,255},
-
- {4,7,9,11,13,15,17,19,21,22,24,26,27,29,30,32,33,35,36,38,39,40,42,
- 43,45,46,47,48,50,51,52,54,55,56,57,59,60,61,62,63,65,66,67,68,69,
- 70,72,73,74,75,76,77,78,79,80,82,83,84,85,86,87,88,89,90,91,92,93,
- 94,95,96,97,98,100,101,102,103,104,105,106,107,108,109,110,111,112,
- 113,114,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,
- 129,130,131,132,133,133,134,135,136,137,138,139,140,141,142,143,144,
- 144,145,146,147,148,149,150,151,152,153,153,154,155,156,157,158,159,
- 160,160,161,162,163,164,165,166,166,167,168,169,170,171,172,172,173,
- 174,175,176,177,178,178,179,180,181,182,183,183,184,185,186,187,188,
- 188,189,190,191,192,193,193,194,195,196,197,197,198,199,200,201,201,
- 202,203,204,205,206,206,207,208,209,210,210,211,212,213,213,214,215,
- 216,217,217,218,219,220,221,221,222,223,224,224,225,226,227,228,228,
- 229,230,231,231,232,233,234,235,235,236,237,238,238,239,240,241,241,
- 242,243,244,244,245,246,247,247,248,249,250,251,251,252,253,254,254,
- 255},
-
- {8,12,16,19,22,24,27,29,31,34,36,38,40,41,43,45,47,49,50,52,53,55,
- 57,58,60,61,63,64,65,67,68,70,71,72,74,75,76,77,79,80,81,82,84,85,
- 86,87,88,90,91,92,93,94,95,96,98,99,100,101,102,103,104,105,106,107,
- 108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,
- 125,126,127,128,129,130,131,132,133,134,135,135,136,137,138,139,140,
- 141,142,143,143,144,145,146,147,148,149,150,150,151,152,153,154,155,
- 155,156,157,158,159,160,160,161,162,163,164,165,165,166,167,168,169,
- 169,170,171,172,173,173,174,175,176,176,177,178,179,180,180,181,182,
- 183,183,184,185,186,186,187,188,189,189,190,191,192,192,193,194,195,
- 195,196,197,197,198,199,200,200,201,202,202,203,204,205,205,206,207,
- 207,208,209,210,210,211,212,212,213,214,214,215,216,216,217,218,219,
- 219,220,221,221,222,223,223,224,225,225,226,227,227,228,229,229,230,
- 231,231,232,233,233,234,235,235,236,237,237,238,238,239,240,240,241,
- 242,242,243,244,244,245,246,246,247,247,248,249,249,250,251,251,252,
- 253,253,254,254,255},
-
- {16,23,28,32,36,39,42,45,48,50,53,55,57,60,62,64,66,68,69,71,73,75,76,
- 78,80,81,83,84,86,87,89,90,92,93,94,96,97,98,100,101,102,103,105,106,
- 107,108,109,110,112,113,114,115,116,117,118,119,120,121,122,123,124,
- 125,126,128,128,129,130,131,132,133,134,135,136,137,138,139,140,141,
- 142,143,143,144,145,146,147,148,149,150,150,151,152,153,154,155,155,
- 156,157,158,159,159,160,161,162,163,163,164,165,166,166,167,168,169,
- 169,170,171,172,172,173,174,175,175,176,177,177,178,179,180,180,181,
- 182,182,183,184,184,185,186,187,187,188,189,189,190,191,191,192,193,
- 193,194,195,195,196,196,197,198,198,199,200,200,201,202,202,203,203,
- 204,205,205,206,207,207,208,208,209,210,210,211,211,212,213,213,214,
- 214,215,216,216,217,217,218,219,219,220,220,221,221,222,223,223,224,
- 224,225,225,226,227,227,228,228,229,229,230,230,231,232,232,233,233,
- 234,234,235,235,236,236,237,237,238,239,239,240,240,241,241,242,242,
- 243,243,244,244,245,245,246,246,247,247,248,248,249,249,250,250,251,
- 251,252,252,253,254,254,255,255}
- };
-
-
-
- int usegamma;
-
- //
- // V_MarkRect
- //
- /*
- void
- V_MarkRect
- ( int x,
- int y,
- int width,
- int height )
- {
- M_AddToBox (dirtybox, x, y);
- M_AddToBox (dirtybox, x+width-1, y+height-1);
- }
- */
-
-
- //
- // V_CopyRect
- //
- void
- V_CopyRect
- ( int srcx,
- int srcy,
- int srcscrn,
- int width,
- int height,
- int destx,
- int desty,
- int destscrn )
- {
- byte* src;
- byte* dest;
-
- #ifdef RANGECHECK
- if (srcx<0
- ||srcx+width >SCREENWIDTH
- || srcy<0
- || srcy+height>SCREENHEIGHT
- ||destx<0||destx+width >SCREENWIDTH
- || desty<0
- || desty+height>SCREENHEIGHT
- || (unsigned)srcscrn>4
- || (unsigned)destscrn>4)
- {
- I_Error ("Bad V_CopyRect");
- }
- #endif
- src = screens[srcscrn]+SCREENWIDTH*srcy+srcx;
- dest = screens[destscrn]+SCREENWIDTH*desty+destx;
-
- for ( ; height>0 ; height--)
- {
- memcpy (dest, src, width);
- src += SCREENWIDTH;
- dest += SCREENWIDTH;
- }
-
- if (destscrn == 0)
- I_MarkRect (destx, desty, width, height);
- }
-
-
- //
- // V_DrawPatch
- // Masks a column based masked pic to the screen.
- //
- void
- V_DrawPatch
- ( int x,
- int y,
- int scrn,
- patch_t* patch )
- {
-
- int count;
- int col;
- column_t* column;
- byte* desttop;
- byte* dest;
- byte* source;
- int w;
- int x0;
-
- y -= SWAPSHORT(patch->topoffset);
- x -= SWAPSHORT(patch->leftoffset);
- #ifdef RANGECHECK
- if (x<0
- ||x+SWAPSHORT(patch->width) >SCREENWIDTH
- || y<0
- || y+SWAPSHORT(patch->height)>SCREENHEIGHT
- || (unsigned)scrn>4)
- {
- fprintf( stderr, "Patch at %d,%d exceeds LFB\n", x,y );
- // No I_Error abort - what is up with TNT.WAD?
- fprintf( stderr, "V_DrawPatch: bad patch (ignored)\n");
- return;
- }
- #endif
-
- x0 = x;
- col = 0;
- desttop = screens[scrn]+y*SCREENWIDTH+x;
-
- w = SWAPSHORT(patch->width);
-
- for ( ; col<w ; x++, col++, desttop++)
- {
- column = (column_t *)((byte *)patch + SWAPLONG(patch->columnofs[col]));
-
- // step through the posts in a column
- while (column->topdelta != 0xff )
- {
- source = (byte *)column + 3;
- dest = desttop + column->topdelta*SCREENWIDTH;
- count = column->length;
-
- while (count--)
- {
- *dest = *source++;
- dest += SCREENWIDTH;
- }
- column = (column_t *)( (byte *)column + column->length
- + 4 );
- }
- }
- if (scrn == 0)
- I_MarkRect (x0, y, SWAPSHORT(patch->width), SWAPSHORT(patch->height));
- }
-
- //
- // V_DrawPatchFlipped
- // Masks a column based masked pic to the screen.
- // Flips horizontally, e.g. to mirror face.
- //
- void
- V_DrawPatchFlipped
- ( int x,
- int y,
- int scrn,
- patch_t* patch )
- {
-
- int count;
- int col;
- column_t* column;
- byte* desttop;
- byte* dest;
- byte* source;
- int w;
- int x0;
-
- y -= SWAPSHORT(patch->topoffset);
- x -= SWAPSHORT(patch->leftoffset);
- #ifdef RANGECHECK
- if (x<0
- ||x+SWAPSHORT(patch->width) >SCREENWIDTH
- || y<0
- || y+SWAPSHORT(patch->height)>SCREENHEIGHT
- || (unsigned)scrn>4)
- {
- fprintf( stderr, "Patch origin %d,%d exceeds LFB\n", x,y );
- I_Error ("Bad V_DrawPatch in V_DrawPatchFlipped");
- }
- #endif
-
- x0 = x;
- col = 0;
- desttop = screens[scrn]+y*SCREENWIDTH+x;
-
- w = SWAPSHORT(patch->width);
-
- for ( ; col<w ; x++, col++, desttop++)
- {
- column = (column_t *)((byte *)patch + SWAPLONG(patch->columnofs[w-1-col]));
-
- // step through the posts in a column
- while (column->topdelta != 0xff )
- {
- source = (byte *)column + 3;
- dest = desttop + column->topdelta*SCREENWIDTH;
- count = column->length;
-
- while (count--)
- {
- *dest = *source++;
- dest += SCREENWIDTH;
- }
- column = (column_t *)( (byte *)column + column->length
- + 4 );
- }
- }
- if (scrn == 0)
- I_MarkRect (x0, y, SWAPSHORT(patch->width), SWAPSHORT(patch->height));
- }
-
-
-
- //
- // V_DrawPatchDirect
- // Draws directly to the screen on the pc.
- //
- void
- V_DrawPatchDirect
- ( int x,
- int y,
- int scrn,
- patch_t* patch )
- {
- V_DrawPatch (x,y,scrn, patch);
- }
-
- void //stretches bitmap to fill screen
- V_DrawPatchInDirect
- ( int x,
- int y,
- int scrn,
- patch_t* patch )
- {
- int count;
- int col;
- column_t* column;
- byte* desttop;
- byte* dest;
- byte* source;
- int w;
- int x0;
-
- int deltax,deltay,deltaxi,deltayi,stretchx,stretchy;
- int srccol,collen;
-
- y -= SWAPSHORT(patch->topoffset);
- x -= SWAPSHORT(patch->leftoffset);
-
- #ifdef RANGECHECK
- if (x<0
- ||x+SWAPSHORT(patch->width)>320
- || y<0
- || y+SWAPSHORT(patch->height)>200
- || (unsigned)scrn>4)
- {
- fprintf( stderr, "Patch at %d,%d exceeds LFB\n", x,y );
- // No I_Error abort - what is up with TNT.WAD?
- fprintf( stderr, "V_DrawPatch: bad patch (ignored)\n");
- return;
- }
- #endif
-
- deltax=(SCREENWIDTH<<16)/320;
- deltaxi=(320<<16)/SCREENWIDTH;
- deltay=(SCREENHEIGHT<<16)/200;
- deltayi=(200<<16)/SCREENHEIGHT;
- stretchx=(x*deltax)>>16;
- stretchy=(y*deltay)>>16;
-
- x0 = x;
- col = 0;
- desttop = screens[scrn]+stretchy*SCREENWIDTH+stretchx;
-
- w = SWAPSHORT(patch->width)<<16;
-
- for ( ; col < w; x++, col += deltaxi, desttop++) {
- column = (column_t *)((byte *)patch + SWAPLONG(patch->columnofs[col>>16]));
-
- // step through the posts in a column
- while (column->topdelta != 0xff ) {
- source = (byte *)column + 3;
- dest = desttop+((column->topdelta*deltay)>>16)*SCREENWIDTH;
- collen = count = (column->length*deltay)>>16;
- srccol = 0;
- while (count--) {
- *dest = source[srccol>>16];
- dest += SCREENWIDTH;
- srccol += deltayi;
- }
- column = (column_t *)((byte *)column + (column->length)+4);
- }
- }
- if (scrn == 0)
- I_MarkRect (x0, y, SWAPSHORT(patch->width), SWAPSHORT(patch->height));
- }
-
-
- void //stretches bitmap to fill screen
- V_DrawPatchInDirectFlipped
- ( int x,
- int y,
- int scrn,
- patch_t* patch )
- {
- int count;
- int col;
- column_t* column;
- byte* desttop;
- byte* dest;
- byte* source;
- int w;
-
- int deltax,deltay,deltaxi,deltayi,stretchx,stretchy;
- int srccol,collen;
-
- y -= SWAPSHORT(patch->topoffset);
- x -= SWAPSHORT(patch->leftoffset);
- #ifdef RANGECHECK
- if (x<0
- ||x+SWAPSHORT(patch->width) >320
- || y<0
- || y+SWAPSHORT(patch->height)>200
- || (unsigned)scrn>4)
- {
- fprintf( stderr, "Patch at %d,%d exceeds LFB\n", x,y );
- // No I_Error abort - what is up with TNT.WAD?
- fprintf( stderr, "V_DrawPatch: bad patch (ignored)\n");
- return;
- }
- #endif
-
- deltax=(SCREENWIDTH<<16)/320;
- deltaxi=(320<<16)/SCREENWIDTH;
- deltay=(SCREENHEIGHT<<16)/200;
- deltayi=(200<<16)/SCREENHEIGHT;
- stretchx=(x*deltax)>>16;
- stretchy=(y*deltay)>>16;
-
- col = 0;
- desttop = screens[scrn]+stretchy*SCREENWIDTH+stretchx;
-
- w = SWAPSHORT(patch->width)<<16;
-
- for ( ; col < w; x++, col += deltaxi, desttop++) {
- column = (column_t *)((byte *)patch +
- SWAPLONG(patch->columnofs[SWAPSHORT(patch->width)-1-(col>>16)]));
-
- // step through the posts in a column
- while (column->topdelta != 0xff) {
- source = (byte *)column + 3;
- dest = desttop+((column->topdelta*deltay)>>16)*SCREENWIDTH;
- collen = count = (column->length*deltay)>>16;
- srccol=0;
- while (count--) {
- *dest=source[srccol>>16];
- dest += SCREENWIDTH;
- srccol+=deltayi;
- }
- column = (column_t *)((byte *)column+(column->length)+4);
- }
- }
- if (scrn == 0)
- I_MarkRect (stretchx,stretchy,(SWAPSHORT(patch->width)*deltax)>>16,
- (SWAPSHORT(patch->height)*deltax)>>16);
- }
-
-
-
- //
- // V_DrawBlock
- // Draw a linear block of pixels into the view buffer.
- //
- void
- V_DrawBlock
- ( int x,
- int y,
- int scrn,
- int width,
- int height,
- byte* src )
- {
- byte* dest;
- int height0;
-
- #ifdef RANGECHECK
- if (x<0
- ||x+width >SCREENWIDTH
- || y<0
- || y+height>SCREENHEIGHT
- || (unsigned)scrn>4 )
- {
- I_Error ("Bad V_DrawBlock");
- }
- #endif
-
- height0 = height;
- dest = screens[scrn] + y*SCREENWIDTH+x;
-
- while (height--)
- {
- memcpy (dest, src, width);
- src += width;
- dest += SCREENWIDTH;
- }
- if (scrn == 0)
- I_MarkRect (x, y, width, height0);
- }
-
-
-
- //
- // V_GetBlock
- // Gets a linear block of pixels from the view buffer.
- //
- void
- V_GetBlock
- ( int x,
- int y,
- int scrn,
- int width,
- int height,
- byte* dest )
- {
- byte* src;
-
- #ifdef RANGECHECK
- if (x<0
- ||x+width >SCREENWIDTH
- || y<0
- || y+height>SCREENHEIGHT
- || (unsigned)scrn>4 )
- {
- I_Error ("Bad V_DrawBlock");
- }
- #endif
-
- src = screens[scrn] + y*SCREENWIDTH+x;
-
- while (height--)
- {
- memcpy (dest, src, width);
- src += SCREENWIDTH;
- dest += width;
- }
- }
-
-
- #ifdef GRAFFITI
- extern int video_graffiti;
- #endif
-
-
- //
- // V_Init
- //
- void V_Init (void)
- {
- int i;
- int p;
- int vid_flags;
- int vid_size;
-
- #ifdef GRAFFITI
- video_graffiti = 0;
- if (M_CheckParm ("-graffitilo")) {
- video_graffiti = 1;
- SCREENWIDTH = 320;
- SCREENHEIGHT = 200;
- } else if (M_CheckParm ("-graffitihi")) {
- video_graffiti = 2;
- SCREENWIDTH = 640;
- SCREENHEIGHT = 400;
- } else {
- #endif
-
- p = M_CheckParm ("-width");
- if (p && p < myargc-1)
- SCREENWIDTH = atoi(myargv[p+1]);
- else
- SCREENWIDTH = 320;
-
- p = M_CheckParm ("-height");
- if (p && p < myargc-1)
- SCREENHEIGHT = atoi(myargv[p+1]);
- else
- SCREENHEIGHT = 200;
-
- #ifdef GRAFFITI
- }
- #endif
-
- printf ("Resolution: %d x %d\n", SCREENWIDTH, SCREENHEIGHT);
-
- if (SCREENWIDTH < 320 || SCREENWIDTH > MAXSCREENWIDTH ||
- SCREENWIDTH % 32 != 0 ||
- SCREENHEIGHT < 200 || SCREENHEIGHT > MAXSCREENHEIGHT)
- I_Error ("Resolution out of range or width is not a multiple of 32");
-
- if ((SCREENHEIGHT*8) == (SCREENWIDTH*5)) // 640x400, 320x200
- weirdaspect = 1;
- else if ((SCREENHEIGHT*4) == (SCREENWIDTH*3)) // 640x480, 320x240
- weirdaspect = 0;
- else {
- weirdaspect = 0;
- printf("Warning: Bad aspect ratio, things might look screwy\n");
- }
-
-
- //allocate all the res-dependant vars
- resinit_r_plane ();
- resinit_am_map ();
- resinit_r_draw ();
- xtoviewangle = (angle_t *)I_calloc (SCREENWIDTH+1, sizeof(angle_t));
- negonearray = (short *)I_calloc (SCREENWIDTH, sizeof(short));
- screenheightarray = (short *)I_calloc (SCREENWIDTH, sizeof(short));
-
- // stick these in low dos memory on PCs
-
- vid_flags = MEMF_FAST+MEMF_PUBLIC;
- if (M_CheckParm ("-mmu"))
- vid_flags += MEMF_NOCACHESYNCPPC+MEMF_NOCACHESYNCM68K;
- vid_size = SCREENWIDTH*SCREENHEIGHT*4+SCREENWIDTH*ST_HEIGHT;
- vid_mem = PPCAllocVec (vid_size, vid_flags);
- if (vid_mem == NULL)
- I_Error ("Couldn't allocate memory for screens\n");
- printf ("Screen memory located at $%08x\n", vid_mem);
-
- for (i=0 ; i<4 ; i++)
- screens[i] = vid_mem + i*SCREENWIDTH*SCREENHEIGHT;
- screens[4] = vid_mem + SCREENWIDTH*SCREENHEIGHT*4;
- }
-