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