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

From Lukasz Izdebski, "Texture: added support for GL_EXT_texture_compression_rgtc, I added support (read and write ) for BC4 BC5 Block Compression to dds file format."

Browse Source
This commit is contained in:
Robert Osfield
2010-08-16 14:11:49 +00:00
parent fe6d590fc5
commit a171c88cf1
4 changed files with 140 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
src/osg/Image.cpp
View File

@@ -332,6 +332,10 @@ unsigned int Image::computeNumComponents(GLenum pixelFormat)
case(GL_COMPRESSED_RGBA_S3TC_DXT1_EXT): return 4;
case(GL_COMPRESSED_RGBA_S3TC_DXT3_EXT): return 4;
case(GL_COMPRESSED_RGBA_S3TC_DXT5_EXT): return 4;
case(GL_COMPRESSED_SIGNED_RED_RGTC1_EXT): return 1;
case(GL_COMPRESSED_RED_RGTC1_EXT): return 1;
case(GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT): return 2;
case(GL_COMPRESSED_RED_GREEN_RGTC2_EXT): return 2;
case(GL_COLOR_INDEX): return 1;
case(GL_STENCIL_INDEX): return 1;
case(GL_DEPTH_COMPONENT): return 1;
@@ -436,6 +440,12 @@ unsigned int Image::computePixelSizeInBits(GLenum format,GLenum type)
case(GL_COMPRESSED_RGBA_S3TC_DXT1_EXT): return 4;
case(GL_COMPRESSED_RGBA_S3TC_DXT3_EXT): return 8;
case(GL_COMPRESSED_RGBA_S3TC_DXT5_EXT): return 8;
case(GL_COMPRESSED_SIGNED_RED_RGTC1_EXT): return 4;
case(GL_COMPRESSED_RED_RGTC1_EXT): return 4;
case(GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT): return 8;
case(GL_COMPRESSED_RED_GREEN_RGTC2_EXT): return 8;
default: break;
}
@@ -588,6 +598,14 @@ unsigned int Image::getTotalSizeInBytesIncludingMipmaps() const
case(GL_COMPRESSED_RGBA_S3TC_DXT5_EXT):
sizeOfLastMipMap = maximum(sizeOfLastMipMap, 16u); // block size of 16
break;
case(GL_COMPRESSED_SIGNED_RED_RGTC1_EXT):
case(GL_COMPRESSED_RED_RGTC1_EXT):
sizeOfLastMipMap = maximum(sizeOfLastMipMap, 8u); // block size of 8
break;
case(GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT):
case(GL_COMPRESSED_RED_GREEN_RGTC2_EXT):
sizeOfLastMipMap = maximum(sizeOfLastMipMap, 16u); // block size of 8
break;
default: break;
}