celestia/src/celengine/multitexture.cpp

108 lines
3.0 KiB
C++

// multirestexture.cpp
//
// Copyright (C) 2002 Deon Ramsey <dramsey@sourceforge.net>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
#include "multitexture.h"
#include "texmanager.h"
#include <celutil/debug.h>
using namespace std;
MultiResTexture::MultiResTexture()
{
tex[lores] = InvalidResource;
tex[medres] = InvalidResource;
tex[hires] = InvalidResource;
}
MultiResTexture::MultiResTexture(ResourceHandle loTex,
ResourceHandle medTex,
ResourceHandle hiTex)
{
tex[lores] = loTex;
tex[medres] = medTex;
tex[hires] = hiTex;
}
MultiResTexture::MultiResTexture(const string& source,
const string& path)
{
setTexture(source, path);
}
void MultiResTexture::setTexture(const string& source, const string& path,
unsigned int flags)
{
TextureManager* texMan = GetTextureManager();
tex[lores] = texMan->getHandle(TextureInfo(source, path, flags, lores));
tex[medres] = texMan->getHandle(TextureInfo(source, path, flags, medres));
tex[hires] = texMan->getHandle(TextureInfo(source, path, flags, hires));
}
void MultiResTexture::setTexture(const string& source, const string& path,
float bumpHeight, unsigned int flags)
{
TextureManager* texMan = GetTextureManager();
tex[lores] = texMan->getHandle(TextureInfo(source, path, bumpHeight, flags, lores));
tex[medres] = texMan->getHandle(TextureInfo(source, path, bumpHeight, flags, medres));
tex[hires] = texMan->getHandle(TextureInfo(source, path, bumpHeight, flags, hires));
}
Texture* MultiResTexture::find(unsigned int resolution)
{
TextureManager* texMan = GetTextureManager();
Texture* res = texMan->find(tex[resolution]);
if (res != nullptr)
return res;
// Preferred resolution isn't available; try the second choice
// Set these to some defaults to avoid GCC complaints
// about possible uninitialized variable usage:
unsigned int secondChoice = medres;
unsigned int lastResort = hires;
switch (resolution)
{
case lores:
secondChoice = medres;
lastResort = hires;
break;
case medres:
secondChoice = lores;
lastResort = hires;
break;
case hires:
secondChoice = medres;
lastResort = lores;
break;
}
tex[resolution] = tex[secondChoice];
res = texMan->find(tex[resolution]);
if (res != nullptr)
return res;
tex[resolution] = tex[lastResort];
return texMan->find(tex[resolution]);
}
bool MultiResTexture::isValid() const
{
return (tex[lores] != InvalidResource ||
tex[medres] != InvalidResource ||
tex[hires] != InvalidResource);
}