c1bc70b711
A lot of files were missing copyright field in the header and
the Blender Foundation contributed to them in a sense of bug
fixing and general maintenance.
This change makes it explicit that those files are at least
partially copyrighted by the Blender Foundation.
Note that this does not make it so the Blender Foundation is
the only holder of the copyright in those files, and developers
who do not have a signed contract with the foundation still
hold the copyright as well.
Another aspect of this change is using SPDX format for the
header. We already used it for the license specification,
and now we state it for the copyright as well, following the
FAQ:
https://reuse.software/faq/
90 lines
2.1 KiB
C++
90 lines
2.1 KiB
C++
/* SPDX-FileCopyrightText: 2020 Blender Foundation
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup gpu
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*/
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#include "gl_context.hh"
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#include "gl_index_buffer.hh"
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namespace blender::gpu {
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GLIndexBuf::~GLIndexBuf()
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{
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GLContext::buf_free(ibo_id_);
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}
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void GLIndexBuf::bind()
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{
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if (is_subrange_) {
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static_cast<GLIndexBuf *>(src_)->bind();
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return;
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}
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const bool allocate_on_device = ibo_id_ == 0;
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if (allocate_on_device) {
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glGenBuffers(1, &ibo_id_);
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}
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo_id_);
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if (data_ != nullptr || allocate_on_device) {
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size_t size = this->size_get();
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/* Sends data to GPU. */
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, data_, GL_STATIC_DRAW);
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/* No need to keep copy of data in system memory. */
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MEM_SAFE_FREE(data_);
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}
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}
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void GLIndexBuf::bind_as_ssbo(uint binding)
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{
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if (ibo_id_ == 0 || data_ != nullptr) {
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/* Calling `glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo_id_)` changes the index buffer
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* of the currently bound VAO.
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*
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* In the OpenGL backend, the VAO state persists even after `GLVertArray::update_bindings`
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* is called.
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*
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* NOTE: For safety, we could call `glBindVertexArray(0)` right after drawing a `GPUBatch`.
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* However, for performance reasons, we have chosen not to do so. */
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glBindVertexArray(0);
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bind();
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}
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BLI_assert(ibo_id_ != 0);
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glBindBufferBase(GL_SHADER_STORAGE_BUFFER, binding, ibo_id_);
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}
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void GLIndexBuf::read(uint32_t *data) const
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{
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BLI_assert(is_active());
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void *buffer = glMapBuffer(GL_ELEMENT_ARRAY_BUFFER, GL_READ_ONLY);
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memcpy(data, buffer, size_get());
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glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER);
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}
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bool GLIndexBuf::is_active() const
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{
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if (!ibo_id_) {
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return false;
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}
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int active_ibo_id = 0;
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glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &active_ibo_id);
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return ibo_id_ == active_ibo_id;
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}
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void GLIndexBuf::upload_data()
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{
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bind();
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}
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void GLIndexBuf::update_sub(uint start, uint len, const void *data)
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{
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glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, start, len, data);
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}
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} // namespace blender::gpu
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