FGFS-4.1/OpenSceneGraph
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Added GL_MAX_TEXTURE_SIZE check and use of OSG_MAX_TEXTURE_SIZE env var to help

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hint to osgText that the native OpenGL implementation only supports textures up to
a given size.
This commit is contained in:
Robert Osfield
2007-05-09 10:41:56 +00:00
parent 77b4ffcac2
commit 2cd6a174d2
1 changed files with 11 additions and 2 deletions
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13
src/osgText/Font.cpp
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@@ -135,8 +135,8 @@ Font::Font(FontImplementation* implementation):
_height(16),
_margin(1),
_marginRatio(0.02),
_textureWidthHint(1024),
_textureHeightHint(1024),
_textureWidthHint(8000),
_textureHeightHint(8000),
_minFilterHint(osg::Texture::LINEAR_MIPMAP_LINEAR),
_magFilterHint(osg::Texture::LINEAR)
{
@@ -514,6 +514,15 @@ void Font::GlyphTexture::apply(osg::State& state) const
if (newTextureObject)
{
GLint maxTextureSize = 256;
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxTextureSize);
if (maxTextureSize < getTextureWidth() || maxTextureSize < getTextureHeight())
{
osg::notify(osg::WARN)<<"Warning: osgText::Font texture size of ("<<getTextureWidth()<<", "<<getTextureHeight()<<") too large, unable to create font texture."<<std::endl;
osg::notify(osg::WARN)<<" Maximum supported by hardward by native OpenGL implementation is ("<<maxTextureSize<<","<<maxTextureSize<<")."<<std::endl;
osg::notify(osg::WARN)<<" Please set OSG_MAX_TEXTURE_SIZE lenvironment variable to "<<maxTextureSize<<" and re-run application."<<std::endl;
return;
}
// being bound for the first time, need to allocate the texture