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/
163 lines
3.6 KiB
C++
163 lines
3.6 KiB
C++
/* SPDX-FileCopyrightText: 2016 by Mike Erwin. All rights reserved.
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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 "GPU_texture.h"
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#include "gl_context.hh"
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#include "gl_vertex_buffer.hh"
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namespace blender::gpu {
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void GLVertBuf::acquire_data()
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{
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if (usage_ == GPU_USAGE_DEVICE_ONLY) {
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return;
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}
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/* Discard previous data if any. */
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MEM_SAFE_FREE(data);
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data = (uchar *)MEM_mallocN(sizeof(uchar) * this->size_alloc_get(), __func__);
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}
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void GLVertBuf::resize_data()
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{
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if (usage_ == GPU_USAGE_DEVICE_ONLY) {
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return;
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}
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data = (uchar *)MEM_reallocN(data, sizeof(uchar) * this->size_alloc_get());
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}
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void GLVertBuf::release_data()
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{
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if (is_wrapper_) {
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return;
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}
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if (vbo_id_ != 0) {
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GPU_TEXTURE_FREE_SAFE(buffer_texture_);
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GLContext::buf_free(vbo_id_);
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vbo_id_ = 0;
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memory_usage -= vbo_size_;
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}
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MEM_SAFE_FREE(data);
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}
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void GLVertBuf::duplicate_data(VertBuf *dst_)
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{
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BLI_assert(GLContext::get() != nullptr);
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GLVertBuf *src = this;
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GLVertBuf *dst = static_cast<GLVertBuf *>(dst_);
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dst->buffer_texture_ = nullptr;
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if (src->vbo_id_ != 0) {
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dst->vbo_size_ = src->size_used_get();
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glGenBuffers(1, &dst->vbo_id_);
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glBindBuffer(GL_COPY_WRITE_BUFFER, dst->vbo_id_);
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glBufferData(GL_COPY_WRITE_BUFFER, dst->vbo_size_, nullptr, to_gl(dst->usage_));
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glBindBuffer(GL_COPY_READ_BUFFER, src->vbo_id_);
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glCopyBufferSubData(GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER, 0, 0, dst->vbo_size_);
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memory_usage += dst->vbo_size_;
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}
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if (data != nullptr) {
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dst->data = (uchar *)MEM_dupallocN(src->data);
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}
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}
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void GLVertBuf::upload_data()
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{
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this->bind();
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}
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void GLVertBuf::bind()
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{
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BLI_assert(GLContext::get() != nullptr);
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if (vbo_id_ == 0) {
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glGenBuffers(1, &vbo_id_);
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}
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glBindBuffer(GL_ARRAY_BUFFER, vbo_id_);
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if (flag & GPU_VERTBUF_DATA_DIRTY) {
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vbo_size_ = this->size_used_get();
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/* Orphan the vbo to avoid sync then upload data. */
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glBufferData(GL_ARRAY_BUFFER, vbo_size_, nullptr, to_gl(usage_));
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/* Do not transfer data from host to device when buffer is device only. */
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if (usage_ != GPU_USAGE_DEVICE_ONLY) {
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glBufferSubData(GL_ARRAY_BUFFER, 0, vbo_size_, data);
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}
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memory_usage += vbo_size_;
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if (usage_ == GPU_USAGE_STATIC) {
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MEM_SAFE_FREE(data);
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}
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flag &= ~GPU_VERTBUF_DATA_DIRTY;
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flag |= GPU_VERTBUF_DATA_UPLOADED;
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}
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}
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void GLVertBuf::bind_as_ssbo(uint binding)
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{
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bind();
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BLI_assert(vbo_id_ != 0);
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glBindBufferBase(GL_SHADER_STORAGE_BUFFER, binding, vbo_id_);
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}
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void GLVertBuf::bind_as_texture(uint binding)
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{
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bind();
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BLI_assert(vbo_id_ != 0);
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if (buffer_texture_ == nullptr) {
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buffer_texture_ = GPU_texture_create_from_vertbuf("vertbuf_as_texture", wrap(this));
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}
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GPU_texture_bind(buffer_texture_, binding);
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}
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void GLVertBuf::read(void *data) const
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{
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BLI_assert(is_active());
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void *result = glMapBuffer(GL_ARRAY_BUFFER, GL_READ_ONLY);
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memcpy(data, result, size_used_get());
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glUnmapBuffer(GL_ARRAY_BUFFER);
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}
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void GLVertBuf::wrap_handle(uint64_t handle)
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{
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BLI_assert(vbo_id_ == 0);
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BLI_assert(glIsBuffer(uint(handle)));
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is_wrapper_ = true;
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vbo_id_ = uint(handle);
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/* We assume the data is already on the device, so no need to allocate or send it. */
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flag = GPU_VERTBUF_DATA_UPLOADED;
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}
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bool GLVertBuf::is_active() const
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{
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if (!vbo_id_) {
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return false;
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}
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int active_vbo_id = 0;
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glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &active_vbo_id);
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return vbo_id_ == active_vbo_id;
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}
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void GLVertBuf::update_sub(uint start, uint len, const void *data)
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{
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glBufferSubData(GL_ARRAY_BUFFER, start, len, data);
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}
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} // namespace blender::gpu
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