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123 lines
3.4 KiB
C++
123 lines
3.4 KiB
C++
/*
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** pskies.cpp
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** Handling Build skies
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**
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**---------------------------------------------------------------------------
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** Copyright 2019 Christoph Oelckers
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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 "psky.h"
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#include "buildtiles.h"
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#include "gamefuncs.h"
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#include "tarray.h"
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static TArray<SkyDefinition> skies;
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static SkyDefinition *FindSky(int tilenum)
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{
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for (auto& sky : skies)
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if (tilenum == sky.tilenum) return &sky;
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return nullptr;
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}
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static SkyDefinition *FindSkyCRC(int64_t crc)
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{
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for (auto& sky : skies)
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if (crc == sky.crc32) return &sky;
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return nullptr;
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}
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void addSky(SkyDefinition& sky, int tilenum)
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{
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SkyDefinition* old = FindSky(tilenum);
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sky.tilenum = tilenum;
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sky.crc32 = INT64_MAX;
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if (sky.scale == 0) sky.scale = 1.f;
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if (old) *old = sky;
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else skies.Push(sky);
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}
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void addSkyCRC(SkyDefinition& sky, int64_t crc32)
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{
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SkyDefinition* old = FindSkyCRC(crc32);
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sky.tilenum = -1;
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sky.crc32 = crc32;
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if (sky.scale == 0) sky.scale = 1.f;
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if (old) *old = sky;
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else skies.Push(sky);
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}
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SkyDefinition getSky(int tilenum)
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{
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SkyDefinition result;
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auto sky = FindSky(tilenum);
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if (sky) result = *sky;
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else
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{
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// todo: handle CRC.
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sky = FindSky(DEFAULTPSKY);
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if (sky)
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result = *sky;
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else
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{
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result = {};
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result.scale = 1.f;
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}
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int w = tileWidth(tilenum);
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if (result.lognumtiles == 0 || w >= 256)
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{
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int bits = sizeToBits(w);
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result.lognumtiles = 11 - bits;
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if ((1 << bits) < w) result.lognumtiles--; // round down if not a power of two
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}
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}
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return result;
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}
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void defineSky(int tilenum, int lognumtiles, const int16_t *tileofs, int yoff, float yscale, int yoff2)
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{
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SkyDefinition sky;
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sky.baselineofs = yoff2 == 0x7fffffff ? yoff : yoff2;
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sky.pmoffset = yoff;
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sky.lognumtiles = lognumtiles;
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sky.scale = yscale;
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memset(sky.offsets, 0, sizeof(sky.offsets));
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if (tileofs) memcpy(sky.offsets, tileofs, 2 << lognumtiles);
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addSky(sky, tilenum);
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}
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