FGFS-4.1/OpenSceneGraph
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Added support for the texture_env_dot3 extension.

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This commit is contained in:
Robert Osfield
2002-08-24 21:11:07 +00:00
parent 239068f223
commit d87dee5a75
3 changed files with 25 additions and 5 deletions
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20
src/osg/TexEnvCombine.cpp
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@@ -31,18 +31,30 @@ TexEnvCombine::~TexEnvCombine()
void TexEnvCombine::apply(State&) const
{
static bool isTexEnvCombineSupported =
static bool s_isTexEnvCombineSupported =
isGLExtensionSupported("GL_ARB_texture_env_combine");
static bool isTexEnvCrossbarSupported =
static bool s_isTexEnvCrossbarSupported =
isGLExtensionSupported("GL_ARB_texture_env_crossbar");
if (isTexEnvCrossbarSupported || (!_needsTexEnvCrossbar && isTexEnvCombineSupported))
static bool s_isTexEnvDot3Supported =
isGLExtensionSupported("GL_ARB_texture_env_dot3");
bool needsTexEnvDot3 = (_combine_RGB==DOT3_RGB) ||
(_combine_RGB==DOT3_RGBA);
bool supported = s_isTexEnvCombineSupported;
if (_needsTexEnvCrossbar && !s_isTexEnvCrossbarSupported) supported = false;
if (needsTexEnvDot3 && !s_isTexEnvDot3Supported) supported = false;
if (supported)
{
glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);
glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, _combine_RGB);
glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, _combine_Alpha);
if (_combine_RGB!=DOT3_RGBA)
glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, _combine_Alpha);
glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB,_source0_RGB );
glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, _source1_RGB);