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Added support for explitly requesting DXT1a and DXT1c compression

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This commit is contained in:
Robert Osfield
2011-04-11 19:11:25 +00:00
parent f0f31e4a8c
commit e7e860b742
4 changed files with 41 additions and 2 deletions
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30
src/osg/Texture.cpp
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@@ -1299,6 +1299,36 @@ void Texture::computeInternalFormatWithImage(const osg::Image& image) const
else internalFormat = image.getInternalTextureFormat();
break;
case(USE_S3TC_DXT1c_COMPRESSION):
if (extensions->isTextureCompressionS3TCSupported())
{
switch(image.getPixelFormat())
{
case(3):
case(4):
case(GL_RGB):
case(GL_RGBA): internalFormat = GL_COMPRESSED_RGB_S3TC_DXT1_EXT; break;
default: internalFormat = image.getInternalTextureFormat(); break;
}
}
else internalFormat = image.getInternalTextureFormat();
break;
case(USE_S3TC_DXT1a_COMPRESSION):
if (extensions->isTextureCompressionS3TCSupported())
{
switch(image.getPixelFormat())
{
case(3):
case(4):
case(GL_RGB):
case(GL_RGBA): internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT; break;
default: internalFormat = image.getInternalTextureFormat(); break;
}
}
else internalFormat = image.getInternalTextureFormat();
break;
case(USE_S3TC_DXT3_COMPRESSION):
if (extensions->isTextureCompressionS3TCSupported())
{