Decrease level of mip-map texture if texture with given size and leve…

…l can't be created by OpenGL.

Fixed shadows of empire: black triangles (regression!) #1612

src/Textures.cpp

@@ -3,6 +3,7 @@
 #include <algorithm>
 #include <thread> // std::this_thread::sleep_for
 #include <chrono> // std::chrono::seconds
+#include "Platform.h"
 #include "Textures.h"
 #include "GBI.h"
 #include "RSP.h"
@@ -1147,8 +1148,16 @@ void TextureCache::_load(u32 _tile, CachedTexture *_pTexture)
  s32 mipLevel = 0;
  _pTexture->max_level = 0;
 
- if (config.generalEmulation.enableLOD != 0 && gSP.texture.level > 1)
- _pTexture->max_level = static_cast<u8>(_tile == 0 ? 0 : gSP.texture.level - 1);
+ if (config.generalEmulation.enableLOD != 0 && gSP.texture.level > 1) {
+ if (_tile == 0) {
+ _pTexture->max_level = 0;
+ } else {
+ _pTexture->max_level = static_cast<u8>(gSP.texture.level - 1);
+ const u16 dim = std::max(_pTexture->width, _pTexture->height);
+ while (dim < static_cast<u16>(1 << _pTexture->max_level))
+ --_pTexture->max_level;
+ }
+ }
 
  ObjectHandle name;
  CachedTexture tmptex(name);