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Print a sensible error message when S3TC support is missing (Fixes #2800)

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This commit is contained in:
scrawl 2015-07-28 23:35:10 +02:00
parent 3a7d0d8dc8
commit d7ad0ee148
1 changed files with 32 additions and 1 deletions
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33
components/resource/texturemanager.cpp
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@ -1,6 +1,7 @@
#include "texturemanager.hpp"
#include <osgDB/Registry>
#include <osg/GLExtensions>
#include <stdexcept>
@ -73,7 +74,7 @@ namespace Resource
{
osg::ref_ptr<osg::Texture2D> tex = it->second;
// Keep mip-mapping disabled if the texture creator explicitely requested it.
// Keep mip-mapping disabled if the texture creator explicitely requested no mipmapping.
osg::Texture::FilterMode oldMin = tex->getFilter(osg::Texture::MIN_FILTER);
if (oldMin == osg::Texture::LINEAR || oldMin == osg::Texture::NEAREST)
{
@ -108,6 +109,32 @@ namespace Resource
}
*/
bool checkSupported(osg::Image* image, const std::string& filename)
{
switch(image->getPixelFormat())
{
case(GL_COMPRESSED_RGB_S3TC_DXT1_EXT):
case(GL_COMPRESSED_RGBA_S3TC_DXT1_EXT):
case(GL_COMPRESSED_RGBA_S3TC_DXT3_EXT):
case(GL_COMPRESSED_RGBA_S3TC_DXT5_EXT):
{
osg::Texture::Extensions* exts = osg::Texture::getExtensions(0, false);
if (exts && !exts->isTextureCompressionS3TCSupported()
// This one works too. Should it be included in isTextureCompressionS3TCSupported()? Submitted as a patch to OSG.
&& !osg::isGLExtensionSupported(0, "GL_S3_s3tc"))
{
std::cerr << "Error loading " << filename << ": no S3TC texture compression support installed" << std::endl;
return false;
}
break;
}
// not bothering with checks for other compression formats right now, we are unlikely to ever use those anyway
default:
return true;
}
return true;
}
osg::ref_ptr<osg::Texture2D> TextureManager::getTexture2D(const std::string &filename, osg::Texture::WrapMode wrapS, osg::Texture::WrapMode wrapT)
{
std::string normalized = filename;
@ -152,6 +179,10 @@ namespace Resource
}
osg::Image* image = result.getImage();
if (!checkSupported(image, filename))
{
return mWarningTexture;
}
// We need to flip images, because the Morrowind texture coordinates use the DirectX convention (top-left image origin),
// but OpenGL uses bottom left as the image origin.