qzdoom-gpl/src/textures/warptexture.cpp

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/*
** warptexture.cpp
** Texture class for warped textures
**
**---------------------------------------------------------------------------
** Copyright 2004-2006 Randy Heit
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
**
*/
#include "doomtype.h"
#include "files.h"
#include "r_data.h"
#include "templates.h"
FWarpTexture::FWarpTexture (FTexture *source)
: SourcePic (source), Pixels (0), Spans (0), GenTime (0), Speed (0.f)
{
CopySize(source);
bNoDecals = source->bNoDecals;
Rotations = source->Rotations;
bWarped = 1;
}
FWarpTexture::~FWarpTexture ()
{
Unload ();
if (Spans != NULL)
{
FreeSpans (Spans);
Spans = NULL;
}
delete SourcePic;
}
void FWarpTexture::Unload ()
{
if (Pixels != NULL)
{
delete[] Pixels;
Pixels = NULL;
}
if (Spans != NULL)
{
FreeSpans (Spans);
Spans = NULL;
}
SourcePic->Unload ();
}
bool FWarpTexture::CheckModified ()
{
return r_FrameTime != GenTime;
}
const BYTE *FWarpTexture::GetPixels ()
{
DWORD time = r_FrameTime;
if (Pixels == NULL || time != GenTime)
{
MakeTexture (time);
}
return Pixels;
}
const BYTE *FWarpTexture::GetColumn (unsigned int column, const Span **spans_out)
{
DWORD time = r_FrameTime;
if (Pixels == NULL || time != GenTime)
{
MakeTexture (time);
}
if ((unsigned)column >= (unsigned)Width)
{
if (WidthMask + 1 == Width)
{
column &= WidthMask;
}
else
{
column %= Width;
}
}
if (spans_out != NULL)
{
if (Spans == NULL)
{
Spans = CreateSpans (Pixels);
}
*spans_out = Spans[column];
}
return Pixels + column*Height;
}
void FWarpTexture::MakeTexture (DWORD time)
{
const BYTE *otherpix = SourcePic->GetPixels ();
if (Pixels == NULL)
{
Pixels = new BYTE[Width * Height];
}
if (Spans != NULL)
{
FreeSpans (Spans);
Spans = NULL;
}
GenTime = time;
BYTE *buffer = (BYTE *)alloca (MAX (Width, Height));
int xsize = Width;
int ysize = Height;
int xmask = WidthMask;
int ymask = Height - 1;
int ybits = HeightBits;
int x, y;
if ((1 << ybits) > Height)
{
ybits--;
}
DWORD timebase = DWORD(time * Speed * 32 / 28);
for (y = ysize-1; y >= 0; y--)
{
int xt, xf = (finesine[(timebase+y*128)&FINEMASK]>>13) & xmask;
const BYTE *source = otherpix + y;
BYTE *dest = Pixels + y;
for (xt = xsize; xt; xt--, xf = (xf+1)&xmask, dest += ysize)
*dest = source[xf << ybits];
}
timebase = DWORD(time * Speed * 23 / 28);
for (x = xsize-1; x >= 0; x--)
{
int yt, yf = (finesine[(time+(x+17)*128)&FINEMASK]>>13) & ymask;
const BYTE *source = Pixels + (x << ybits);
BYTE *dest = buffer;
for (yt = ysize; yt; yt--, yf = (yf+1)&ymask)
*dest++ = source[yf];
memcpy (Pixels+(x<<ybits), buffer, ysize);
}
}
// [GRB] Eternity-like warping
FWarp2Texture::FWarp2Texture (FTexture *source)
: FWarpTexture (source)
{
bWarped = 2;
}
void FWarp2Texture::MakeTexture (DWORD time)
{
const BYTE *otherpix = SourcePic->GetPixels ();
if (Pixels == NULL)
{
Pixels = new BYTE[Width * Height];
}
if (Spans != NULL)
{
FreeSpans (Spans);
Spans = NULL;
}
GenTime = time;
int xsize = Width;
int ysize = Height;
int xmask = WidthMask;
int ymask = Height - 1;
int ybits = HeightBits;
int x, y;
if ((1 << ybits) > Height)
{
ybits--;
}
DWORD timebase = DWORD(time * Speed * 40 / 28);
for (x = 0; x < xsize; ++x)
{
BYTE *dest = Pixels + (x << ybits);
for (y = 0; y < ysize; ++y)
{
int xt = (x + 128
+ ((finesine[(y*128 + timebase*5 + 900) & FINEMASK]*2)>>FRACBITS)
+ ((finesine[(x*256 + timebase*4 + 300) & FINEMASK]*2)>>FRACBITS)) & xmask;
int yt = (y + 128
+ ((finesine[(y*128 + timebase*3 + 700) & FINEMASK]*2)>>FRACBITS)
+ ((finesine[(x*256 + timebase*4 + 1200) & FINEMASK]*2)>>FRACBITS)) & ymask;
*dest++ = otherpix[(xt << ybits) + yt];
}
}
}