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47a3341e07
Bug: dawn:22 Change-Id: I00b3cd65ac4eb494b05918251f4b3b2bcaf24f71 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/22200 Commit-Queue: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Kai Ninomiya <kainino@chromium.org>
91 lines
3.0 KiB
C++
91 lines
3.0 KiB
C++
// Copyright 2017 The Dawn Authors
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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 express 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 "dawn_native/opengl/BufferGL.h"
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#include "dawn_native/opengl/DeviceGL.h"
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namespace dawn_native { namespace opengl {
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// Buffer
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Buffer::Buffer(Device* device, const BufferDescriptor* descriptor)
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: BufferBase(device, descriptor) {
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device->gl.GenBuffers(1, &mBuffer);
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device->gl.BindBuffer(GL_ARRAY_BUFFER, mBuffer);
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device->gl.BufferData(GL_ARRAY_BUFFER, GetSize(), nullptr, GL_STATIC_DRAW);
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}
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Buffer::~Buffer() {
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DestroyInternal();
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}
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GLuint Buffer::GetHandle() const {
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return mBuffer;
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}
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bool Buffer::IsMapWritable() const {
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// TODO(enga): All buffers in GL can be mapped. Investigate if mapping them will cause the
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// driver to migrate it to shared memory.
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return true;
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}
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MaybeError Buffer::MapAtCreationImpl(uint8_t** mappedPointer) {
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const OpenGLFunctions& gl = ToBackend(GetDevice())->gl;
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gl.BindBuffer(GL_ARRAY_BUFFER, mBuffer);
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mMappedData = gl.MapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
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*mappedPointer = reinterpret_cast<uint8_t*>(mMappedData);
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return {};
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}
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MaybeError Buffer::MapReadAsyncImpl(uint32_t serial) {
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const OpenGLFunctions& gl = ToBackend(GetDevice())->gl;
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// TODO(cwallez@chromium.org): this does GPU->CPU synchronization, we could require a high
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// version of OpenGL that would let us map the buffer unsynchronized.
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gl.BindBuffer(GL_ARRAY_BUFFER, mBuffer);
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mMappedData = gl.MapBuffer(GL_ARRAY_BUFFER, GL_READ_ONLY);
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return {};
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}
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MaybeError Buffer::MapWriteAsyncImpl(uint32_t serial) {
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const OpenGLFunctions& gl = ToBackend(GetDevice())->gl;
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// TODO(cwallez@chromium.org): this does GPU->CPU synchronization, we could require a high
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// version of OpenGL that would let us map the buffer unsynchronized.
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gl.BindBuffer(GL_ARRAY_BUFFER, mBuffer);
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mMappedData = gl.MapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
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return {};
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}
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void* Buffer::GetMappedPointerImpl() {
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return mMappedData;
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}
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void Buffer::UnmapImpl() {
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const OpenGLFunctions& gl = ToBackend(GetDevice())->gl;
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gl.BindBuffer(GL_ARRAY_BUFFER, mBuffer);
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gl.UnmapBuffer(GL_ARRAY_BUFFER);
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mMappedData = nullptr;
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}
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void Buffer::DestroyImpl() {
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ToBackend(GetDevice())->gl.DeleteBuffers(1, &mBuffer);
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mBuffer = 0;
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}
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}} // namespace dawn_native::opengl
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