Clément Foucault
53a806f6df
This also make the validation quicker by tracking the currently bound slots.
133 lines
3.2 KiB
C++
133 lines
3.2 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2020 Blender Foundation.
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* All rights reserved.
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*/
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/** \file
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* \ingroup gpu
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*/
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#include "BKE_global.h"
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#include "BLI_string.h"
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#include "GPU_extensions.h"
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#include "gpu_backend.hh"
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#include "gpu_context_private.hh"
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#include "gl_backend.hh"
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#include "gl_uniform_buffer.hh"
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namespace blender::gpu {
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/* -------------------------------------------------------------------- */
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/** \name Creation & Deletion
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* \{ */
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GLUniformBuf::GLUniformBuf(size_t size, const char *name) : UniformBuf(size, name)
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{
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/* Do not create ubo GL buffer here to allow allocation from any thread. */
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}
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GLUniformBuf::~GLUniformBuf()
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{
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GLBackend::get()->buf_free(ubo_id_);
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}
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/** \} */
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/* -------------------------------------------------------------------- */
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/** \name Data upload / update
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* \{ */
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void GLUniformBuf::init(void)
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{
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BLI_assert(GPU_context_active_get());
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glGenBuffers(1, &ubo_id_);
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glBindBuffer(GL_UNIFORM_BUFFER, ubo_id_);
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glBufferData(GL_UNIFORM_BUFFER, size_in_bytes_, NULL, GL_DYNAMIC_DRAW);
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#ifndef __APPLE__
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if ((G.debug & G_DEBUG_GPU) && (GLEW_VERSION_4_3 || GLEW_KHR_debug)) {
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char sh_name[64];
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SNPRINTF(sh_name, "UBO-%s", name_);
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glObjectLabel(GL_BUFFER, ubo_id_, -1, sh_name);
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}
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#endif
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}
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void GLUniformBuf::update(const void *data)
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{
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if (ubo_id_ == 0) {
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this->init();
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}
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glBindBuffer(GL_UNIFORM_BUFFER, ubo_id_);
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glBufferSubData(GL_UNIFORM_BUFFER, 0, size_in_bytes_, data);
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glBindBuffer(GL_UNIFORM_BUFFER, 0);
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}
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/** \} */
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/* -------------------------------------------------------------------- */
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/** \name Usage
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* \{ */
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void GLUniformBuf::bind(int slot)
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{
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if (slot >= GPU_max_ubo_binds()) {
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fprintf(stderr,
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"Error: Trying to bind \"%s\" ubo to slot %d which is above the reported limit of %d.",
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name_,
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slot,
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GPU_max_ubo_binds());
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return;
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}
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if (ubo_id_ == 0) {
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this->init();
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}
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if (data_ != NULL) {
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this->update(data_);
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MEM_SAFE_FREE(data_);
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}
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slot_ = slot;
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glBindBufferBase(GL_UNIFORM_BUFFER, slot_, ubo_id_);
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#ifdef DEBUG
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BLI_assert(slot < 16);
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static_cast<GLContext *>(GPU_context_active_get())->bound_ubo_slots |= 1 << slot;
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#endif
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}
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void GLUniformBuf::unbind(void)
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{
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#ifdef DEBUG
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/* NOTE: This only unbinds the last bound slot. */
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glBindBufferBase(GL_UNIFORM_BUFFER, slot_, 0);
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/* Hope that the context did not change. */
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static_cast<GLContext *>(GPU_context_active_get())->bound_ubo_slots &= ~(1 << slot_);
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#endif
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slot_ = 0;
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}
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/** \} */
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} // namespace blender::gpu
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