diff options
author | Clément Foucault <foucault.clem@gmail.com> | 2022-03-16 10:42:12 +0300 |
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committer | Clément Foucault <foucault.clem@gmail.com> | 2022-03-18 22:59:20 +0300 |
commit | 7ee816e32f3655d4ca8abb555f885d8de9ba0520 (patch) | |
tree | 50190c369e80c20fadc1bc55d56f160188a1ff90 /source/blender/gpu/opengl | |
parent | 5bd38f3be8542f09ece0d936b04dba3f8854cb51 (diff) |
GPU: StorageBuf: Add method to clear the buffer in place.
This is a faster way to clear a buffer instead of reuploading new data.
It is equivalent to `memset` and runs directly on the GPU.
This is better to clear huge buffers and to avoid the sync cost of data upload.
Diffstat (limited to 'source/blender/gpu/opengl')
-rw-r--r-- | source/blender/gpu/opengl/gl_storage_buffer.cc | 25 | ||||
-rw-r--r-- | source/blender/gpu/opengl/gl_storage_buffer.hh | 1 |
2 files changed, 26 insertions, 0 deletions
diff --git a/source/blender/gpu/opengl/gl_storage_buffer.cc b/source/blender/gpu/opengl/gl_storage_buffer.cc index 12f942439ca..9cdde0b5734 100644 --- a/source/blender/gpu/opengl/gl_storage_buffer.cc +++ b/source/blender/gpu/opengl/gl_storage_buffer.cc @@ -112,6 +112,31 @@ void GLStorageBuf::unbind() slot_ = 0; } +void GLStorageBuf::clear(eGPUTextureFormat internal_format, eGPUDataFormat data_format, void *data) +{ + if (ssbo_id_ == 0) { + this->init(); + } + + if (GLContext::direct_state_access_support) { + glClearNamedBufferData(ssbo_id_, + to_gl_internal_format(internal_format), + to_gl_data_format(internal_format), + to_gl(data_format), + data); + } + else { + /* WATCH(@fclem): This should be ok since we only use clear outside of drawing functions. */ + glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo_id_); + glClearBufferData(GL_SHADER_STORAGE_BUFFER, + to_gl_internal_format(internal_format), + to_gl_data_format(internal_format), + to_gl(data_format), + data); + glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0); + } +} + /** \} */ } // namespace blender::gpu diff --git a/source/blender/gpu/opengl/gl_storage_buffer.hh b/source/blender/gpu/opengl/gl_storage_buffer.hh index 106d2158273..d657a4de09c 100644 --- a/source/blender/gpu/opengl/gl_storage_buffer.hh +++ b/source/blender/gpu/opengl/gl_storage_buffer.hh @@ -35,6 +35,7 @@ class GLStorageBuf : public StorageBuf { void update(const void *data) override; void bind(int slot) override; void unbind() override; + void clear(eGPUTextureFormat internal_format, eGPUDataFormat data_format, void *data) override; private: void init(); |