36 lines
771 B
C++
36 lines
771 B
C++
#include <osg/GLExtensions>
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#include <osg/TexEnv>
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using namespace osg;
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TexEnv::TexEnv()
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{
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_mode = MODULATE;
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_color.set(0.0f,0.0f,0.0f,0.0f);
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}
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TexEnv::~TexEnv()
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{
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}
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void TexEnv::apply(State&) const
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{
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if (_mode==ADD)
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{
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static bool isTexEnvAddSupported = isGLExtensionSupported("GL_ARB_texture_env_add");
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if (isTexEnvAddSupported)
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glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, ADD);
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else // fallback on OpenGL default.
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glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, MODULATE);
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}
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else
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{
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glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, _mode);
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if (_mode==TexEnv::BLEND)
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{
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glTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, _color.ptr());
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}
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}
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}
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