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Git Commits -> Revision 3d36489

Revision 3d36489 by Sergey Sharybin (master)
July 20, 2015, 20:29 (GMT)
OpenSubdiv: Commit of OpenSubdiv integration into Blender

This commit contains all the remained parts needed for initial integration of
OpenSubdiv into Blender's subdivision surface code. Includes both GPU and CPU
backends which works in the following way:

- When SubSurf modifier is the last in the modifiers stack then GPU pipeline
of OpenSubdiv is used, making viewport performance as fast as possible.

This also requires graphscard with GLSL 1.5 support. If this requirement is
not met, then no GPU pipeline is used at all.

- If SubSurf is not a last modifier or if DerivesMesh is being evaluated for
rendering then CPU limit evaluation API from OpenSubdiv is used. This only
replaces the legacy evaluation code from CCGSubSurf_legacy, but keeps CCG
structures exactly the same as they used to be for ages now.

This integration is fully covered with ifdef and not enabled by default
because there are several TODOs to be solved first:

- Face varying data interpolation is not really cleanly implemented for GPU
in OpenSubdiv 3.0. It is also not implemented for limit evaluation API.

This basically means we'll have really hard time supporting UVs.

- Limit evaluation only works with adaptivly subdivided meshes so far, which
basically means all the points of CCG are pushed to the limit. This gives
different result from old code.

- There are some serious optimizations possible on the topology refiner
creation, which would speed up initial OpenSubdiv mesh creation.

- There are some hardcoded asumptions in the GPU and DerivedMesh areas which
could be generalized.

That's something where Antony and Campbell can help, making it so the code
is structured in a way which is reusable by all planned viewport projects.

- There are also some workarounds in the dependency graph to make sure OpenGL
buffers are only freed from the main thread.

Those who'll be wanting to make experiments with this code should grab dev
branch (NOT master) from

https://github.com/Nazg-Gul/OpenSubdiv/tree/dev

There are some patches applied in there which we're working on on getting
into upstream.

Commit Details:

Full Hash: 3d364896725db8336d785ba6cf977b62c0f2c0ce
Parent Commit: 2466c4f
Lines Changed: +1556, -190

53 Modified Paths:

/build_files/cmake/macros.cmake (+14, -0) (Diff)
/build_files/scons/config/darwin-config.py (+6, -0) (Diff)
/build_files/scons/config/linux-config.py (+8, -0) (Diff)
/build_files/scons/config/win32-mingw-config.py (+6, -0) (Diff)
/build_files/scons/config/win32-vc-config.py (+6, -0) (Diff)
/build_files/scons/config/win64-mingw-config.py (+6, -0) (Diff)
/build_files/scons/config/win64-vc-config.py (+6, -0) (Diff)
/build_files/scons/tools/Blender.py (+12, -0) (Diff)
/build_files/scons/tools/btools.py (+10, -1) (Diff)
/CMakeLists.txt (+32, -0) (Diff)
/extern/CMakeLists.txt (+1, -1) (Diff)
/extern/SConscript (+1, -1) (Diff)
/intern/CMakeLists.txt (+4, -1) (Diff)
/intern/opensubdiv/opensubdiv_converter.cc (+5, -0) (Diff)
/intern/opensubdiv/opensubdiv_gpu_capi.cc (+2, -7) (Diff)
/intern/SConscript (+2, -0) (Diff)
/release/scripts/startup/bl_ui/space_userpref.py (+4, -0) (Diff)
/SConstruct (+3, -0) (Diff)
/source/blender/blenkernel/BKE_modifier.h (+6, -0) (Diff)
/source/blender/blenkernel/BKE_subsurf.h (+3, -2) (Diff)
/source/blender/blenkernel/CMakeLists.txt (+10, -0) (Diff)
/source/blender/blenkernel/intern/CCGSubSurf.c (+94, -4) (Diff)
/source/blender/blenkernel/intern/CCGSubSurf.h (+46, -0) (Diff)
/source/blender/blenkernel/intern/CCGSubSurf_intern.h (+57, -0) (Diff)
/source/blender/blenkernel/intern/DerivedMesh.c (+54, -12) (Diff)
/source/blender/blenkernel/intern/scene.c (+45, -0) (Diff)
/source/blender/blenkernel/intern/subsurf_ccg.c (+496, -113) (Diff)
/source/blender/blenkernel/SConscript (+5, -0) (Diff)
/source/blender/gpu/CMakeLists.txt (+4, -0) (Diff)
/source/blender/gpu/GPU_draw.h (+5, -0) (Diff)
/source/blender/gpu/GPU_material.h (+8, -2) (Diff)
/source/blender/gpu/intern/gpu_codegen.c (+169, -9) (Diff)
/source/blender/gpu/intern/gpu_codegen.h (+2, -1) (Diff)
/source/blender/gpu/intern/gpu_draw.c (+66, -7) (Diff)
/source/blender/gpu/intern/gpu_extensions.c (+90, -10) (Diff)
/source/blender/gpu/intern/gpu_material.c (+78, -11) (Diff)
/source/blender/gpu/intern/gpu_simple_shader.c (+2, -1) (Diff)
/source/blender/gpu/SConscript (+4, -0) (Diff)
/source/blender/gpu/shaders/gpu_shader_material.glsl (+5, -0) (Diff)
/source/blender/gpu/shaders/gpu_shader_vertex.glsl (+19, -2) (Diff)
/source/blender/makesdna/DNA_userdef_types.h (+13, -0) (Diff)
/source/blender/makesrna/intern/CMakeLists.txt (+7, -0) (Diff)
/source/blender/makesrna/intern/rna_userdef.c (+75, -0) (Diff)
/source/blender/makesrna/intern/SConscript (+4, -0) (Diff)
/source/blender/makesrna/SConscript (+4, -0) (Diff)
/source/blender/modifiers/CMakeLists.txt (+4, -0) (Diff)
/source/blender/modifiers/intern/MOD_subsurf.c (+28, -3) (Diff)
/source/blender/windowmanager/CMakeLists.txt (+7, -0) (Diff)
/source/blender/windowmanager/intern/wm_init_exit.c (+8, -0) (Diff)
/source/blender/windowmanager/SConscript (+4, -0) (Diff)
/source/blenderplayer/CMakeLists.txt (+4, -0) (Diff)
/source/gameengine/Ketsji/BL_BlenderShader.cpp (+1, -1) (Diff)
/source/gameengine/Rasterizer/RAS_OpenGLRasterizer/RAS_StorageIM.cpp (+1, -1) (Diff)
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