0,0 → 1,493 |
// 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. |
// |
//----------------------------------------------------------------------------- |
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static const char |
rcsid[] = "$Id: v_video.c,v 1.5 1997/02/03 22:45:13 b1 Exp $"; |
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#include "m_swap.h" |
#include "i_system.h" |
#include "r_local.h" |
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#include "doomdef.h" |
#include "doomdata.h" |
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#include "m_bbox.h" |
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#include "v_video.h" |
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// Each screen is [SCREENWIDTH*SCREENHEIGHT]; |
byte* screens[5]; |
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int dirtybox[4]; |
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// 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} |
}; |
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int usegamma; |
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// |
// 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); |
} |
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// |
// 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; |
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#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 |
V_MarkRect (destx, desty, width, height); |
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src = screens[srcscrn]+SCREENWIDTH*srcy+srcx; |
dest = screens[destscrn]+SCREENWIDTH*desty+destx; |
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for ( ; height>0 ; height--) |
{ |
memcpy (dest, src, width); |
src += SCREENWIDTH; |
dest += SCREENWIDTH; |
} |
} |
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// |
// V_DrawPatch |
// Masks a column based masked pic to the screen. |
// |
void |
V_DrawPatch |
( int x, |
int y, |
int scrn, |
patch_t* patch ) |
{ |
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int count; |
int col; |
column_t* column; |
byte* desttop; |
byte* dest; |
byte* source; |
int w; |
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y -= SHORT(patch->topoffset); |
x -= SHORT(patch->leftoffset); |
#ifdef RANGECHECK |
if (x<0 |
||x+SHORT(patch->width) >SCREENWIDTH |
|| y<0 |
|| y+SHORT(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 |
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if (!scrn) |
V_MarkRect (x, y, SHORT(patch->width), SHORT(patch->height)); |
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col = 0; |
desttop = screens[scrn]+y*SCREENWIDTH+x; |
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w = SHORT(patch->width); |
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for ( ; col<w ; x++, col++, desttop++) |
{ |
column = (column_t *)((byte *)patch + LONG(patch->columnofs[col])); |
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// step through the posts in a column |
while (column->topdelta != 0xff ) |
{ |
source = (byte *)column + 3; |
dest = desttop + column->topdelta*SCREENWIDTH; |
count = column->length; |
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while (count--) |
{ |
*dest = *source++; |
dest += SCREENWIDTH; |
} |
column = (column_t *)( (byte *)column + column->length |
+ 4 ); |
} |
} |
} |
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// |
// 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 ) |
{ |
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int count; |
int col; |
column_t* column; |
byte* desttop; |
byte* dest; |
byte* source; |
int w; |
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y -= SHORT(patch->topoffset); |
x -= SHORT(patch->leftoffset); |
#ifdef RANGECHECK |
if (x<0 |
||x+SHORT(patch->width) >SCREENWIDTH |
|| y<0 |
|| y+SHORT(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 |
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if (!scrn) |
V_MarkRect (x, y, SHORT(patch->width), SHORT(patch->height)); |
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col = 0; |
desttop = screens[scrn]+y*SCREENWIDTH+x; |
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w = SHORT(patch->width); |
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for ( ; col<w ; x++, col++, desttop++) |
{ |
column = (column_t *)((byte *)patch + LONG(patch->columnofs[w-1-col])); |
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// step through the posts in a column |
while (column->topdelta != 0xff ) |
{ |
source = (byte *)column + 3; |
dest = desttop + column->topdelta*SCREENWIDTH; |
count = column->length; |
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while (count--) |
{ |
*dest = *source++; |
dest += SCREENWIDTH; |
} |
column = (column_t *)( (byte *)column + column->length |
+ 4 ); |
} |
} |
} |
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// |
// 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); |
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/* |
int count; |
int col; |
column_t* column; |
byte* desttop; |
byte* dest; |
byte* source; |
int w; |
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y -= SHORT(patch->topoffset); |
x -= SHORT(patch->leftoffset); |
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#ifdef RANGECHECK |
if (x<0 |
||x+SHORT(patch->width) >SCREENWIDTH |
|| y<0 |
|| y+SHORT(patch->height)>SCREENHEIGHT |
|| (unsigned)scrn>4) |
{ |
I_Error ("Bad V_DrawPatchDirect"); |
} |
#endif |
|
// V_MarkRect (x, y, SHORT(patch->width), SHORT(patch->height)); |
desttop = destscreen + y*SCREENWIDTH/4 + (x>>2); |
|
w = SHORT(patch->width); |
for ( col = 0 ; col<w ; col++) |
{ |
outp (SC_INDEX+1,1<<(x&3)); |
column = (column_t *)((byte *)patch + LONG(patch->columnofs[col])); |
|
// step through the posts in a column |
|
while (column->topdelta != 0xff ) |
{ |
source = (byte *)column + 3; |
dest = desttop + column->topdelta*SCREENWIDTH/4; |
count = column->length; |
|
while (count--) |
{ |
*dest = *source++; |
dest += SCREENWIDTH/4; |
} |
column = (column_t *)( (byte *)column + column->length |
+ 4 ); |
} |
if ( ((++x)&3) == 0 ) |
desttop++; // go to next byte, not next plane |
}*/ |
} |
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// |
// 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; |
|
#ifdef RANGECHECK |
if (x<0 |
||x+width >SCREENWIDTH |
|| y<0 |
|| y+height>SCREENHEIGHT |
|| (unsigned)scrn>4 ) |
{ |
I_Error ("Bad V_DrawBlock"); |
} |
#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--) |
{ |
memcpy (dest, src, width); |
src += width; |
dest += SCREENWIDTH; |
} |
} |
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// |
// 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 |
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src = screens[scrn] + y*SCREENWIDTH+x; |
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while (height--) |
{ |
memcpy (dest, src, width); |
src += SCREENWIDTH; |
dest += width; |
} |
} |
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// |
// V_Init |
// |
void V_Init (void) |
{ |
int i; |
byte* base; |
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// stick these in low dos memory on PCs |
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base = _aligned_malloc(SCREENWIDTH*SCREENHEIGHT*4, 128);I_AllocLow (SCREENWIDTH*SCREENHEIGHT*4); |
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for (i=0 ; i<4 ; i++) |
screens[i] = base + i*SCREENWIDTH*SCREENHEIGHT; |
} |