diff options
author | Clément Foucault <foucault.clem@gmail.com> | 2020-08-31 16:14:47 +0300 |
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committer | Clément Foucault <foucault.clem@gmail.com> | 2020-08-31 16:14:47 +0300 |
commit | 1804eb57fd27fceb0ed113e3ef2f4a55db0d03c8 (patch) | |
tree | 003ceca6cdb280e5f6fc408b6833dea8b36f2bd6 /source/blender/gpu/opengl/gl_immediate.hh | |
parent | 1b3a0ae2316063d9817210a8fe5fd4588cee47cf (diff) |
GPUImmediate: GL backend isolation
This is part of the Vulkan backend task T68990.
This is mostly a cleanup, however, there is a small change:
We don't use a special Vertex Array binding function for Immediate
anymore and just reuse the one for batches.
This might create a bit more state changes but this could be fixed
easily if it causes perf regression.
# Conflicts:
# source/blender/gpu/intern/gpu_context.cc
Diffstat (limited to 'source/blender/gpu/opengl/gl_immediate.hh')
-rw-r--r-- | source/blender/gpu/opengl/gl_immediate.hh | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/source/blender/gpu/opengl/gl_immediate.hh b/source/blender/gpu/opengl/gl_immediate.hh new file mode 100644 index 00000000000..2b9b90d692b --- /dev/null +++ b/source/blender/gpu/opengl/gl_immediate.hh @@ -0,0 +1,81 @@ +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * The Original Code is Copyright (C) 2016 by Mike Erwin. + * All rights reserved. + */ + +/** \file + * \ingroup gpu + * + * Mimics old style opengl immediate mode drawing. + */ + +#pragma once + +#include "MEM_guardedalloc.h" + +#include "glew-mx.h" + +#include "gpu_immediate_private.hh" + +namespace blender::gpu { + +/* size of internal buffer */ +#define DEFAULT_INTERNAL_BUFFER_SIZE (4 * 1024 * 1024) + +class GLImmediate : public Immediate { + private: + /* Use two buffers for strict and unstrict vertex count to + * avoid some huge driver slowdown (see T70922). + * Use accessor functions to get / modify. */ + struct { + /** Opengl Handle for this buffer. */ + GLuint vbo_id = 0; + /** Offset of the mapped data in data. */ + size_t buffer_offset = 0; + /** Size of the whole buffer in bytes. */ + size_t buffer_size = 0; + } buffer, buffer_strict; + /** Size in bytes of the mapped region. */ + size_t bytes_mapped_ = 0; + /** Vertex array for this immediate mode instance. */ + GLuint vao_id_ = 0; + + public: + GLImmediate(); + ~GLImmediate(); + + uchar *begin(void) override; + void end(void) override; + + private: + GLuint &vbo_id(void) + { + return strict_vertex_len ? buffer_strict.vbo_id : buffer.vbo_id; + }; + + size_t &buffer_offset(void) + { + return strict_vertex_len ? buffer_strict.buffer_offset : buffer.buffer_offset; + }; + + size_t &buffer_size(void) + { + return strict_vertex_len ? buffer_strict.buffer_size : buffer.buffer_size; + }; +}; + +} // namespace blender::gpu
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