106 lines
3.8 KiB
C++
106 lines
3.8 KiB
C++
// Copyright 2022 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either expresso or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "BufferGl.h"
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namespace gfxstream {
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namespace gl {
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BufferGl::BufferGl(uint64_t size, HandleType handle, ContextHelper* helper)
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: mSize(size), mHandle(handle), mContextHelper(helper) {}
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// static
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std::unique_ptr<BufferGl> BufferGl::create(uint64_t size, HandleType handle, ContextHelper* helper) {
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RecursiveScopedContextBind bind(helper);
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if (!bind.isOk()) {
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return NULL;
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}
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std::unique_ptr<BufferGl> buffer(new BufferGl(size, handle, helper));
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/*
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// TODO: GL_EXT_external_buffer
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s_gles2.glGenBuffers(1, &buffer->m_buffer);
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s_gles2.glBindBuffer(GL_ARRAY_BUFFER, buffer->m_buffer);
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s_gles2.glBufferData(GL_ARRAY_BUFFER, size, nullptr, GL_DYNAMIC_DRAW);
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*/
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return buffer;
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}
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void BufferGl::read(uint64_t offset, uint64_t size, void* bytes) {
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RecursiveScopedContextBind bind(mContextHelper);
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if (!bind.isOk()) {
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return;
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}
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// Note: Gfxstream does not yet support GL_EXT_external_buffer so BufferGl reads are
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// currently a no-op from the host point-of-view when the guest is not using ANGLE.
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// Instead, the guest shadow buffer contains the source of truth of the buffer
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// contents.
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//
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// For completeness, this is not fully correct as a guest that is not using ANGLE
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// could still have native users of Vulkan. In such cases, the guest shadow buffer
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// contents are not yet sync'ed with the Vulkan contents. However, this has not yet
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// been observed to be an issue.
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/*
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// TODO: GL_EXT_external_buffer
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s_gles2.glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
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void* mapped = s_gles2.glMapBufferRange(GL_ARRAY_BUFFER, offset, size, GL_MAP_READ_BIT);
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std::memcpy(bytes, mapped, size);
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s_gles2.glUnmapBuffer(GL_ARRAY_BUFFER);
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s_gles2.glBindBuffer(GL_ARRAY_BUFFER, 0);
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*/
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}
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void BufferGl::subUpdate(uint64_t offset, uint64_t size, const void* bytes) {
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RecursiveScopedContextBind bind(mContextHelper);
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if (!bind.isOk()) {
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return;
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}
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// Note: Gfxstream does not yet support GL_EXT_external_buffer so BufferGl writes are
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// currently a no-op from the host point-of-view when the guest is not using ANGLE.
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// Instead, the guest shadow buffer contains the source of truth of the buffer
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// contents.
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//
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// For completeness, this is not fully correct as a guest that is not using ANGLE
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// could still have native users of Vulkan. In such cases, the guest shadow buffer
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// contents are not yet sync'ed with the Vulkan contents. However, this has not yet
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// been observed to be an issue.
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/*
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// TODO: GL_EXT_external_buffer
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s_gles2.glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
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s_gles2.glBufferSubData(GL_ARRAY_BUFFER, offset, size, bytes);
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s_gles2.glBindBuffer(GL_ARRAY_BUFFER, 0);
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*/
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}
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/*static*/
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std::unique_ptr<BufferGl> BufferGl::onLoad(android::base::Stream* stream, ContextHelper* helper) {
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const auto size = static_cast<uint64_t>(stream->getBe64());
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const auto handle = static_cast<HandleType>(stream->getBe32());
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return std::unique_ptr<BufferGl>(new BufferGl(size, handle, helper));
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}
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void BufferGl::onSave(android::base::Stream* stream) {
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stream->putBe64(mSize);
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stream->putBe32(mHandle);
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}
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} // namespace gl
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} // namespace gfxstream
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