mirror of
https://github.com/ZDoom/Raze.git
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2fa5e339fc
So that for anything new I don't have to bother with the awful 2D interface Build provides.
158 lines
5.3 KiB
C++
158 lines
5.3 KiB
C++
/*
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** r_data.cpp
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**
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**---------------------------------------------------------------------------
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** Copyright 2008-2011 Randy Heit
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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**
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*/
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#include "templates.h"
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#include "renderstyle.h"
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#include "c_cvars.h"
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CVAR (Bool, r_drawtrans, true, 0)
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CVAR (Int, r_drawfuzz, 1, CVAR_ARCHIVE)
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// Convert legacy render styles to flexible render styles.
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FRenderStyle LegacyRenderStyles[STYLE_Count] =
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{
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{ { STYLEOP_None, STYLEALPHA_Zero, STYLEALPHA_Zero, 0 } }, /* STYLE_None */
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{ { STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, STYLEF_Alpha1 } }, /* STYLE_Normal */
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{ { STYLEOP_Fuzz, STYLEALPHA_Src, STYLEALPHA_InvSrc, 0 } }, /* STYLE_Fuzzy */
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{ { STYLEOP_FuzzOrAdd, STYLEALPHA_Src, STYLEALPHA_InvSrc, 0 } }, /* STYLE_OptFuzzy */
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{ { STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, STYLEF_Alpha1 | STYLEF_ColorIsFixed } }, /* STYLE_Stencil */
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{ { STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, 0 } }, /* STYLE_Translucent */
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{ { STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_One, 0 } }, /* STYLE_Add */
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{ { STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, STYLEF_RedIsAlpha | STYLEF_ColorIsFixed } }, /* STYLE_Shaded */
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{ { STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_InvSrc, STYLEF_ColorIsFixed } }, /* STYLE_TranslucentStencil */
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{ { STYLEOP_Shadow, 0, 0, 0 } }, /* STYLE_Shadow */
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{ { STYLEOP_RevSub, STYLEALPHA_Src, STYLEALPHA_One, 0 } }, /* STYLE_Subtract*/
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{ { STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_One, STYLEF_ColorIsFixed } }, /* STYLE_AddStencil */
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{ { STYLEOP_Add, STYLEALPHA_Src, STYLEALPHA_One, STYLEF_RedIsAlpha | STYLEF_ColorIsFixed } }, /* STYLE_AddShaded */
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{ { STYLEOP_Add, STYLEALPHA_DstCol, STYLEALPHA_Zero, 0 } }, /* STYLE_Multiply */
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{ { STYLEOP_Add, STYLEALPHA_InvDstCol, STYLEALPHA_Zero, 0 } }, /* STYLE_InverseMultiply */
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{ { STYLEOP_Add, STYLEALPHA_SrcCol, STYLEALPHA_InvSrcCol, 0 } }, /* STYLE_ColorBlend */
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{ { STYLEOP_Add, STYLEALPHA_One, STYLEALPHA_Zero, 0 } }, /* STYLE_Source */
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{ { STYLEOP_Add, STYLEALPHA_SrcCol, STYLEALPHA_One, 0 } }, /* STYLE_ColorAdd */
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};
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double GetAlpha(int type, double alpha)
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{
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switch (type)
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{
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case STYLEALPHA_Zero: return 0;
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case STYLEALPHA_One: return 1.;
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case STYLEALPHA_Src: return alpha;
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case STYLEALPHA_InvSrc: return 1. - alpha;
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default: return 0.5; // undeterminable
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}
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}
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//==========================================================================
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//
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// FRenderStyle :: IsVisible
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//
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// Coupled with the given alpha, will this render style produce something
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// visible on-screen?
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//
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//==========================================================================
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bool FRenderStyle::IsVisible(double alpha) const throw()
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{
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if (BlendOp == STYLEOP_None)
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{
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return false;
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}
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if (BlendOp == STYLEOP_Add || BlendOp == STYLEOP_RevSub)
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{
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if (Flags & STYLEF_Alpha1)
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{
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alpha = 1.;
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}
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else
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{
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alpha = clamp(alpha, 0., 1.);
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}
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return GetAlpha(SrcAlpha, alpha) != 0 || GetAlpha(DestAlpha, alpha) != 1;
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}
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// Treat anything else as visible.
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return true;
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}
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//==========================================================================
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//
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// FRenderStyle :: CheckFuzz
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//
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// Adjusts settings based on r_drawfuzz CVAR
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//
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//==========================================================================
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void FRenderStyle::CheckFuzz()
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{
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switch (BlendOp)
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{
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default:
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return;
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case STYLEOP_FuzzOrAdd:
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if (r_drawtrans && r_drawfuzz == 0)
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{
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BlendOp = STYLEOP_Add;
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return;
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}
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break;
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case STYLEOP_FuzzOrSub:
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if (r_drawtrans && r_drawfuzz == 0)
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{
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BlendOp = STYLEOP_Sub;
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return;
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}
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break;
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case STYLEOP_FuzzOrRevSub:
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if (r_drawtrans && r_drawfuzz == 0)
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{
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BlendOp = STYLEOP_RevSub;
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return;
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}
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break;
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}
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if (r_drawfuzz == 2)
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{
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BlendOp = STYLEOP_Shadow;
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}
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else
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{
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BlendOp = STYLEOP_Fuzz;
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}
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}
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