FGFS-4.1/OpenSceneGraph
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From Marcin Hajder, "This submission contains Texture2DMultisample osg implementation.

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Texture2DMultismaple as name suggests provides means to directly access subsamples of rendered FBO target. (GLSL 1.5 texelFetch call).

Recently I was working on deferred renderer with OSG, during that I noticed there is no support for multisampled textures (GL_ARB_texture_multisample extension). After consultations with Paul Martz and Wojtek Lewandowski I added Texture2DMultisample class and made few necessary changes around osg::FrameBufferObject, osg::Texture and osgUtil::RenderStage classes."

and from follow email:

"Fixed. According to ARB_texture_multisample extension specification multisample textures  don't need TexParameters since they can only be fetched with  texelFetch."
This commit is contained in:
Robert Osfield
2010-04-22 17:02:22 +00:00
parent 3f7454fd8c
commit 5d0b84edd0
8 changed files with 291 additions and 4 deletions
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6
src/osg/Texture.cpp
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@@ -2187,6 +2187,8 @@ Texture::Extensions::Extensions(unsigned int contextID)
_isTextureBorderClampSupported = OSG_GL3_FEATURES || isGLExtensionOrVersionSupported(contextID,"GL_ARB_texture_border_clamp", 1.3f);
_isGenerateMipMapSupported = builtInSupport || isGLExtensionOrVersionSupported(contextID,"GL_SGIS_generate_mipmap", 1.4f);
_isTextureMultisampledSupported = isGLExtensionSupported(contextID,"GL_ARB_texture_multisample");
_isShadowSupported = OSG_GL3_FEATURES || isGLExtensionSupported(contextID,"GL_ARB_shadow");
@@ -2251,10 +2253,12 @@ Texture::Extensions::Extensions(unsigned int contextID)
setGLExtensionFuncPtr(_glCompressedTexImage2D,"glCompressedTexImage2D","glCompressedTexImage2DARB");
setGLExtensionFuncPtr(_glCompressedTexSubImage2D,"glCompressedTexSubImage2D","glCompressedTexSubImage2DARB");
setGLExtensionFuncPtr(_glGetCompressedTexImage,"glGetCompressedTexImage","glGetCompressedTexImageARB");;
setGLExtensionFuncPtr(_glTexImage2DMultisample, "glTexImage2DMultisample", "glTexImage2DMultisampleARB");
setGLExtensionFuncPtr(_glTexParameterIiv, "glTexParameterIiv", "glTexParameterIivARB");
setGLExtensionFuncPtr(_glTexParameterIuiv, "glTexParameterIuiv", "glTexParameterIuivARB");
if (_glTexParameterIiv == NULL) setGLExtensionFuncPtr(_glTexParameterIiv, "glTexParameterIivEXT");
if (_glTexParameterIuiv == NULL) setGLExtensionFuncPtr(_glTexParameterIuiv, "glTexParameterIuivEXT");