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multitexture.cpp
Package: celestia-1.6.0.tar.gz　[view]
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Upload Date: 2022-07-26
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Code Size: 3k
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OpenGL program

Development Platform:

Visual C++

multitexture.cpp：Code Content
  1. // multirestexture.cpp
  2. //
  3. // Copyright (C) 2002 Deon Ramsey <dramsey@sourceforge.net>
  4. //
  5. // This program is free software; you can redistribute it and/or
  6. // modify it under the terms of the GNU General Public License
  7. // as published by the Free Software Foundation; either version 2
  8. // of the License, or (at your option) any later version.
  10. #include "multitexture.h"
  11. #include "texmanager.h"
  12. #include <celutil/debug.h>
  14. using namespace std;
  17. MultiResTexture::MultiResTexture()
  18. {
  19.     tex[lores] = InvalidResource;
  20.     tex[medres] = InvalidResource;
  21.     tex[hires] = InvalidResource;
  22. }
  25. MultiResTexture::MultiResTexture(ResourceHandle loTex,
  26.                                  ResourceHandle medTex,
  27.                                  ResourceHandle hiTex)
  28. {
  29.     tex[lores] = loTex;
  30.     tex[medres] = medTex;
  31.     tex[hires] = hiTex;
  32. }
  35. MultiResTexture::MultiResTexture(const string& source,
  36.                                  const string& path)
  37. {
  38.     setTexture(source, path);
  39. }
  42. void MultiResTexture::setTexture(const string& source, const string& path,
  43.                                  unsigned int flags)
  44. {
  45.     TextureManager* texMan = GetTextureManager();
  46.     tex[lores] = texMan->getHandle(TextureInfo(source, path, flags, lores));
  47.     tex[medres] = texMan->getHandle(TextureInfo(source, path, flags, medres));
  48.     tex[hires] = texMan->getHandle(TextureInfo(source, path, flags, hires));
  49. }
  52. void MultiResTexture::setTexture(const string& source, const string& path,
  53.                                  float bumpHeight, unsigned int flags)
  54. {
  55.     TextureManager* texMan = GetTextureManager();
  56.     tex[lores] = texMan->getHandle(TextureInfo(source, path, bumpHeight, flags, lores));
  57.     tex[medres] = texMan->getHandle(TextureInfo(source, path, bumpHeight, flags, medres));
  58.     tex[hires] = texMan->getHandle(TextureInfo(source, path, bumpHeight, flags, hires));
  59. }
  62. Texture* MultiResTexture::find(unsigned int resolution)
  63. {
  64.     TextureManager* texMan = GetTextureManager();
  66.     Texture* res = texMan->find(tex[resolution]);
  67.     if (res != NULL)
  68.         return res;
  70.     // Preferred resolution isn't available; try the second choice
  71.     // Set these to some defaults to avoid GCC complaints
  72.     // about possible uninitialized variable usage:
  73.     unsigned int secondChoice   = medres;
  74.     unsigned int lastResort     = hires;
  75.     switch (resolution)
  76.     {
  77.     case lores:
  78.         secondChoice = medres;
  79.         lastResort = hires;
  80.         break;
  81.     case medres:
  82.         secondChoice = lores;
  83.         lastResort = hires;
  84.         break;
  85.     case hires:
  86.         secondChoice = medres;
  87.         lastResort = lores;
  88.         break;
  89.     }
  91.     tex[resolution] = tex[secondChoice];
  92.     res = texMan->find(tex[resolution]);
  93.     if (res != NULL)
  94.         return res;
  96.     tex[resolution] = tex[lastResort];
  98.     return texMan->find(tex[resolution]);
  99. }
  102. bool MultiResTexture::isValid() const
  103. {
  104.     return (tex[lores] != InvalidResource ||
  105.             tex[medres] != InvalidResource ||
  106.             tex[hires] != InvalidResource);
  107. }