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- moved render style and border drawing code out of r_draw.cpp.

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SVN r3251 (trunk)
This commit is contained in:
Christoph Oelckers 2011-07-05 20:41:53 +00:00
commit 5bf6398d85
18 changed files with 364 additions and 311 deletions
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src/resources/renderstyle.cpp Normal file
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/*
** r_data.cpp
**
**---------------------------------------------------------------------------
** Copyright 2008-2011 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 "farchive.h"
#include "templates.h"
#include "renderstyle.h"
#include "c_cvars.h"
CVAR (Bool, r_drawtrans, true, 0)
CVAR (Int, r_drawfuzz, 1, CVAR_ARCHIVE)
// Convert legacy render styles to flexible render styles.
// Apple's GCC 4.0.1 apparently wants to initialize the AsDWORD member of FRenderStyle
// rather than the struct before it, which goes against the standard.
#ifndef __APPLE__
FRenderStyle LegacyRenderStyles[STYLE_Count] =
{
/* STYLE_None */ {{ STYLEOP_None, STYLEALPHA_Zero, STYLEALPHA_Zero, 0 }},
/* STYLE_Normal */ {{ STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, STYLEF_Alpha1 }},
/* STYLE_Fuzzy */ {{ STYLEOP_Fuzz, STYLEALPHA_Src, STYLEALPHA_InvSrc, 0 }},
/* STYLE_SoulTrans */ {{ STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, STYLEF_TransSoulsAlpha }},
/* STYLE_OptFuzzy */ {{ STYLEOP_FuzzOrAdd, STYLEALPHA_Src, STYLEALPHA_InvSrc, 0 }},
/* STYLE_Stencil */ {{ STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, STYLEF_Alpha1 | STYLEF_ColorIsFixed }},
/* STYLE_Translucent */ {{ STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, 0 }},
/* STYLE_Add */ {{ STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_One, 0 }},
/* STYLE_Shaded */ {{ STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, STYLEF_RedIsAlpha | STYLEF_ColorIsFixed }},
/* STYLE_TranslucentStencil */{{ STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, STYLEF_ColorIsFixed }},
/* STYLE_Shadow */{{ STYLEOP_Shadow, 0, 0, 0 }},
};
#else
FRenderStyle LegacyRenderStyles[STYLE_Count];
static const BYTE Styles[STYLE_Count * 4] =
{
STYLEOP_None, STYLEALPHA_Zero, STYLEALPHA_Zero, 0,
STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, STYLEF_Alpha1,
STYLEOP_Fuzz, STYLEALPHA_Src, STYLEALPHA_InvSrc, 0,
STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, STYLEF_TransSoulsAlpha,
STYLEOP_FuzzOrAdd, STYLEALPHA_Src, STYLEALPHA_InvSrc, 0,
STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, STYLEF_Alpha1 | STYLEF_ColorIsFixed,
STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, 0,
STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_One, 0,
STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, STYLEF_RedIsAlpha | STYLEF_ColorIsFixed,
STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, STYLEF_ColorIsFixed,
STYLEOP_Shadow, 0, 0, 0
};
static struct LegacyInit
{
LegacyInit()
{
for (int i = 0; i < STYLE_Count; ++i)
{
LegacyRenderStyles[i].BlendOp = Styles[i*4];
LegacyRenderStyles[i].SrcAlpha = Styles[i*4+1];
LegacyRenderStyles[i].DestAlpha = Styles[i*4+2];
LegacyRenderStyles[i].Flags = Styles[i*4+3];
}
}
} DoLegacyInit;
#endif
FArchive &operator<< (FArchive &arc, FRenderStyle &style)
{
arc << style.BlendOp << style.SrcAlpha << style.DestAlpha << style.Flags;
return arc;
}
//==========================================================================
//
// FRenderStyle :: IsVisible
//
// Coupled with the given alpha, will this render style produce something
// visible on-screen?
//
//==========================================================================
bool FRenderStyle::IsVisible(fixed_t alpha) const throw()
{
if (BlendOp == STYLEOP_None)
{
return false;
}
if (BlendOp == STYLEOP_Add || BlendOp == STYLEOP_RevSub)
{
if (Flags & STYLEF_Alpha1)
{
alpha = FRACUNIT;
}
else
{
alpha = clamp(alpha, 0, FRACUNIT);
}
return GetAlpha(SrcAlpha, alpha) != 0 || GetAlpha(DestAlpha, alpha) != FRACUNIT;
}
// Treat anything else as visible.
return true;
}
//==========================================================================
//
// FRenderStyle :: CheckFuzz
//
// Adjusts settings based on r_drawfuzz CVAR
//
//==========================================================================
void FRenderStyle::CheckFuzz()
{
switch (BlendOp)
{
default:
return;
case STYLEOP_FuzzOrAdd:
if (r_drawtrans && r_drawfuzz == 0)
{
BlendOp = STYLEOP_Add;
return;
}
break;
case STYLEOP_FuzzOrSub:
if (r_drawtrans && r_drawfuzz == 0)
{
BlendOp = STYLEOP_Sub;
return;
}
break;
case STYLEOP_FuzzOrRevSub:
if (r_drawtrans && r_drawfuzz == 0)
{
BlendOp = STYLEOP_RevSub;
return;
}
break;
}
if (r_drawfuzz == 2)
{
BlendOp = STYLEOP_Shadow;
}
else
{
BlendOp = STYLEOP_Fuzz;
}
}
fixed_t GetAlpha(int type, fixed_t alpha)
{
switch (type)
{
case STYLEALPHA_Zero: return 0;
case STYLEALPHA_One: return FRACUNIT;
case STYLEALPHA_Src: return alpha;
case STYLEALPHA_InvSrc: return FRACUNIT - alpha;
default: return 0;
}
}