diff options
author | Clément Foucault <foucault.clem@gmail.com> | 2022-07-30 14:28:05 +0300 |
---|---|---|
committer | Clément Foucault <foucault.clem@gmail.com> | 2022-08-02 22:53:17 +0300 |
commit | 1e5ab041d79224a634268e0b80f114b5566387c4 (patch) | |
tree | 59e6622029b7c03b469ee193d50acb464ba1a80e /source/blender/gpu | |
parent | 72206195542369a231a40cf4428cef2508321404 (diff) |
GPUBatch: Add GPU_batch_draw_indirect
This allows rendering a batch with parameters computed by the GPU.
Contains GL backend implementation.
Diffstat (limited to 'source/blender/gpu')
-rw-r--r-- | source/blender/gpu/GPU_batch.h | 9 | ||||
-rw-r--r-- | source/blender/gpu/intern/gpu_batch.cc | 9 | ||||
-rw-r--r-- | source/blender/gpu/intern/gpu_batch_private.hh | 1 | ||||
-rw-r--r-- | source/blender/gpu/opengl/gl_batch.cc | 24 | ||||
-rw-r--r-- | source/blender/gpu/opengl/gl_batch.hh | 1 |
5 files changed, 43 insertions, 1 deletions
diff --git a/source/blender/gpu/GPU_batch.h b/source/blender/gpu/GPU_batch.h index 7fad8dd23be..7ef2d81ac31 100644 --- a/source/blender/gpu/GPU_batch.h +++ b/source/blender/gpu/GPU_batch.h @@ -14,6 +14,7 @@ #include "GPU_index_buffer.h" #include "GPU_shader.h" +#include "GPU_storage_buffer.h" #include "GPU_uniform_buffer.h" #include "GPU_vertex_buffer.h" @@ -171,7 +172,13 @@ void GPU_batch_draw_instanced(GPUBatch *batch, int i_count); /** * This does not bind/unbind shader and does not call GPU_matrix_bind(). */ -void GPU_batch_draw_advanced(GPUBatch *, int v_first, int v_count, int i_first, int i_count); +void GPU_batch_draw_advanced(GPUBatch *batch, int v_first, int v_count, int i_first, int i_count); + +/** + * Issue a draw call using GPU computed arguments. The argument are expected to be valid for the + * type of geometry drawn (index or non-indexed). + */ +void GPU_batch_draw_indirect(GPUBatch *batch, GPUStorageBuf *indirect_buf); #if 0 /* future plans */ diff --git a/source/blender/gpu/intern/gpu_batch.cc b/source/blender/gpu/intern/gpu_batch.cc index 1b34b6e6c69..0b47a7b2952 100644 --- a/source/blender/gpu/intern/gpu_batch.cc +++ b/source/blender/gpu/intern/gpu_batch.cc @@ -270,6 +270,15 @@ void GPU_batch_draw_advanced( batch->draw(v_first, v_count, i_first, i_count); } +void GPU_batch_draw_indirect(GPUBatch *gpu_batch, GPUStorageBuf *indirect_buf) +{ + BLI_assert(Context::get()->shader != nullptr); + BLI_assert(indirect_buf != nullptr); + Batch *batch = static_cast<Batch *>(gpu_batch); + + batch->draw_indirect(indirect_buf); +} + /** \} */ /* -------------------------------------------------------------------- */ diff --git a/source/blender/gpu/intern/gpu_batch_private.hh b/source/blender/gpu/intern/gpu_batch_private.hh index 23052f601d2..8ca19884fd7 100644 --- a/source/blender/gpu/intern/gpu_batch_private.hh +++ b/source/blender/gpu/intern/gpu_batch_private.hh @@ -29,6 +29,7 @@ class Batch : public GPUBatch { virtual ~Batch() = default; virtual void draw(int v_first, int v_count, int i_first, int i_count) = 0; + virtual void draw_indirect(GPUStorageBuf *indirect_buf) = 0; /* Convenience casts. */ IndexBuf *elem_() const diff --git a/source/blender/gpu/opengl/gl_batch.cc b/source/blender/gpu/opengl/gl_batch.cc index fde2a53bb0f..4ec86b98cbe 100644 --- a/source/blender/gpu/opengl/gl_batch.cc +++ b/source/blender/gpu/opengl/gl_batch.cc @@ -18,6 +18,7 @@ #include "gl_debug.hh" #include "gl_index_buffer.hh" #include "gl_primitive.hh" +#include "gl_storage_buffer.hh" #include "gl_vertex_array.hh" #include "gl_batch.hh" @@ -326,4 +327,27 @@ void GLBatch::draw(int v_first, int v_count, int i_first, int i_count) } } +void GLBatch::draw_indirect(GPUStorageBuf *indirect_buf) +{ + GL_CHECK_RESOURCES("Batch"); + + this->bind(0); + + dynamic_cast<GLStorageBuf *>(unwrap(indirect_buf))->bind_as(GL_DRAW_INDIRECT_BUFFER); + /* This barrier needs to be here as it only work on the currently bound indirect buffer. */ + glMemoryBarrier(GL_COMMAND_BARRIER_BIT); + + GLenum gl_type = to_gl(prim_type); + if (elem) { + const GLIndexBuf *el = this->elem_(); + GLenum index_type = to_gl(el->index_type_); + glDrawElementsIndirect(gl_type, index_type, (GLvoid *)nullptr); + } + else { + glDrawArraysIndirect(gl_type, (GLvoid *)nullptr); + } + /* Unbind. */ + glBindBuffer(GL_DRAW_INDIRECT_BUFFER, 0); +} + /** \} */ diff --git a/source/blender/gpu/opengl/gl_batch.hh b/source/blender/gpu/opengl/gl_batch.hh index 1a18572c683..bb53d9b31f1 100644 --- a/source/blender/gpu/opengl/gl_batch.hh +++ b/source/blender/gpu/opengl/gl_batch.hh @@ -93,6 +93,7 @@ class GLBatch : public Batch { public: void draw(int v_first, int v_count, int i_first, int i_count) override; + void draw_indirect(GPUStorageBuf *indirect_buf) override; void bind(int i_first); /* Convenience getters. */ |