FGFS-4.1/OpenSceneGraph
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Changed the minimum tile image size to be 4x4 to avoid problems in mipmap generation

Browse Source 
that was occuring at sizes of 2x2, seemingly somewhere in the OpenGL driver.
This commit is contained in:
Robert Osfield
2005-10-26 20:00:10 +00:00
parent 026fba54b4
commit e66fd1dc70
1 changed files with 5 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/osgTerrain/DataSet.cpp
View File

@@ -1451,8 +1451,10 @@ bool DataSet::DestinationTile::computeImageResolution(unsigned int layer, unsign
unsigned int numColumnsRequired = osg::minimum(_imagery_maxNumColumns,numColumnsAtFullRes);
unsigned int numRowsRequired = osg::minimum(_imagery_maxNumRows,numRowsAtFullRes);
numColumns = 1;
numRows = 1;
// use a minimum image size of 4x4 to avoid mipmap generation problems in OpenGL at sizes at 2x2.
numColumns = 4;
numRows = 4;
// round to nearest power of two above or equal to the required resolution
while (numColumns<numColumnsRequired) numColumns *= 2;
while (numRows<numRowsRequired) numRows *= 2;
@@ -2246,7 +2248,7 @@ osg::StateSet* DataSet::DestinationTile::createStateSet()
bool inlineImageFile = _dataSet->getDestinationTileExtension()==".ive";
bool compressedImageSupported = inlineImageFile || imageExension==".dds";
bool mipmapImageSupported = inlineImageFile;
bool mipmapImageSupported = compressedImageSupported; // inlineImageFile;
int minumCompressedTextureSize = 64;
int minumDXT3CompressedTextureSize = 256;