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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/vr/graphics_delegate_android.h"
#include "base/android/android_hardware_buffer_compat.h"
#include "components/webxr/mailbox_to_surface_bridge_impl.h"
#include "device/vr/android/xr_image_transport_base.h"
#include "gpu/command_buffer/common/shared_image_usage.h"
#include "gpu/command_buffer/service/ahardwarebuffer_utils.h"
#include "gpu/ipc/common/android/android_hardware_buffer_utils.h"
#include "ui/gfx/color_space.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_surface.h"
#include "ui/gl/gl_utils.h"
#include "ui/gl/init/gl_factory.h"
namespace vr {
GraphicsDelegateAndroid::GraphicsDelegateAndroid() = default;
GraphicsDelegateAndroid::~GraphicsDelegateAndroid() = default;
void GraphicsDelegateAndroid::Initialize(base::OnceClosure on_initialized) {
// We can only share native GL resources with the runtimes, and they don't
// support ANGLE, so disable it.
// TODO(crbug.com/40744597): support ANGLE?
gl::DisableANGLE();
gl::GLDisplay* display = nullptr;
if (gl::GetGLImplementation() == gl::kGLImplementationNone) {
display = gl::init::InitializeGLOneOff(
/*gpu_preference=*/gl::GpuPreference::kDefault);
if (!display) {
LOG(ERROR) << "gl::init::InitializeGLOneOff failed";
return;
}
} else {
display = gl::GetDefaultDisplayEGL();
}
surface_ = gl::init::CreateOffscreenGLSurface(display, gfx::Size());
if (!surface_.get()) {
LOG(ERROR) << "gl::init::CreateOffscreenGLSurface failed";
return;
}
context_ = gl::init::CreateGLContext(nullptr, surface_.get(),
gl::GLContextAttribs());
if (!context_.get()) {
DLOG(ERROR) << "gl::init::CreateGLContext failed";
return;
}
if (!context_->MakeCurrent(surface_.get())) {
DLOG(ERROR) << "gl::GLContext::MakeCurrent() failed";
return;
}
mailbox_bridge_ = std::make_unique<webxr::MailboxToSurfaceBridgeImpl>();
mailbox_bridge_->CreateAndBindContextProvider(base::BindOnce(
&GraphicsDelegateAndroid::OnMailboxBridgeReady,
weak_ptr_factory_.GetWeakPtr(), std::move(on_initialized)));
}
void GraphicsDelegateAndroid::OnMailboxBridgeReady(
base::OnceClosure on_inititalized) {
DCHECK(mailbox_bridge_->IsConnected());
std::move(on_inititalized).Run();
}
bool GraphicsDelegateAndroid::BindContext() {
return true;
}
void GraphicsDelegateAndroid::ClearContext() {}
bool GraphicsDelegateAndroid::PreRender() {
BindContext();
// Create a memory buffer and a shared image referencing that memory buffer.
if (!EnsureMemoryBuffer()) {
DLOG(ERROR) << __func__ << " Failed to ensure memory buffer";
return false;
}
DVLOG(3) << __func__ << " mailbox: "
<< shared_buffer_->shared_image->mailbox().ToDebugString()
<< " sync_token: " << shared_buffer_->sync_token.ToDebugString();
GLenum target = shared_buffer_->local_texture.target;
glBindTexture(target, shared_buffer_->local_texture.id);
glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// Bind our image/texture/memory buffer as the draw framebuffer.
glGenFramebuffersEXT(1, &draw_frame_buffer_);
glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER, draw_frame_buffer_);
glFramebufferTexture2DEXT(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, target,
shared_buffer_->local_texture.id, 0);
return true;
}
void GraphicsDelegateAndroid::PostRender() {
// Unbind the drawing buffer.
glBindFramebufferEXT(GL_FRAMEBUFFER, 0);
glDeleteFramebuffersEXT(1, &draw_frame_buffer_);
glBindTexture(GL_TEXTURE_2D, 0);
draw_frame_buffer_ = 0;
// Generate a SyncToken after GPU is done accessing the texture.
mailbox_bridge_->GenSyncToken(&shared_buffer_->sync_token);
ClearContext();
glFlush();
}
gfx::GpuMemoryBufferHandle GraphicsDelegateAndroid::GetTexture() {
if (!shared_buffer_) {
return gfx::GpuMemoryBufferHandle();
}
return gfx::GpuMemoryBufferHandle(shared_buffer_->scoped_ahb_handle.Clone());
}
gpu::SyncToken GraphicsDelegateAndroid::GetSyncToken() {
if (!shared_buffer_) {
return gpu::SyncToken();
}
return shared_buffer_->sync_token;
}
bool GraphicsDelegateAndroid::EnsureMemoryBuffer() {
// The code here is very similar to that used in both XrImageTransportBase
// and OpenXrGraphicsDelegateOpenGLES's ResizeShardBuffer methods. However,
// they all have subtly different uses.
// TODO(https://crbug.com/40909689): Consolidate this usage.
gfx::Size buffer_size = GetTextureSize();
if (shared_buffer_ && shared_buffer_->shared_image &&
shared_buffer_->shared_image->size() == buffer_size) {
return true;
}
if (!shared_buffer_) {
shared_buffer_ = std::make_unique<device::WebXrSharedBuffer>();
shared_buffer_->local_texture.target = GL_TEXTURE_2D;
glGenTextures(1, &shared_buffer_->local_texture.id);
}
if (shared_buffer_->shared_image) {
mailbox_bridge_->DestroySharedImage(
shared_buffer_->sync_token, std::move(shared_buffer_->shared_image));
}
// Remove reference to previous image (if any).
shared_buffer_->local_eglimage.reset();
static constexpr gfx::BufferFormat format = gfx::BufferFormat::RGBA_8888;
static constexpr gfx::BufferUsage usage = gfx::BufferUsage::SCANOUT;
gpu::SharedImageUsageSet shared_image_usage =
gpu::SHARED_IMAGE_USAGE_SCANOUT | gpu::SHARED_IMAGE_USAGE_DISPLAY_READ |
gpu::SHARED_IMAGE_USAGE_GLES2_READ | gpu::SHARED_IMAGE_USAGE_GLES2_WRITE;
shared_buffer_->scoped_ahb_handle =
gpu::CreateScopedHardwareBufferHandle(buffer_size, format, usage);
// Create a GMB Handle from AHardwareBuffer handle.
gfx::GpuMemoryBufferHandle gmb_handle;
gmb_handle.type = gfx::ANDROID_HARDWARE_BUFFER;
// GpuMemoryBufferId is not used in this case and hence hardcoding it to 1
// here.
gmb_handle.id = gfx::GpuMemoryBufferId(1);
gmb_handle.android_hardware_buffer =
shared_buffer_->scoped_ahb_handle.Clone();
shared_buffer_->shared_image = mailbox_bridge_->CreateSharedImage(
std::move(gmb_handle), format, buffer_size, gfx::ColorSpace(),
shared_image_usage, shared_buffer_->sync_token);
DVLOG(2) << ": CreateSharedImage, mailbox="
<< shared_buffer_->shared_image->mailbox().ToDebugString()
<< ", SyncToken=" << shared_buffer_->sync_token.ToDebugString()
<< ", size=" << buffer_size.ToString();
// Create an EGLImage for the buffer.
auto egl_image = gpu::CreateEGLImageFromAHardwareBuffer(
shared_buffer_->scoped_ahb_handle.get());
if (!egl_image.is_valid()) {
return false;
}
glBindTexture(shared_buffer_->local_texture.target,
shared_buffer_->local_texture.id);
glEGLImageTargetTexture2DOES(shared_buffer_->local_texture.target,
egl_image.get());
shared_buffer_->local_eglimage = std::move(egl_image);
return true;
}
void GraphicsDelegateAndroid::ResetMemoryBuffer() {
// Stop using a memory buffer if we had an error submitting with it.
if (shared_buffer_ && shared_buffer_->shared_image) {
DCHECK(mailbox_bridge_);
DVLOG(2) << ": DestroySharedImage, mailbox="
<< shared_buffer_->shared_image->mailbox().ToDebugString();
mailbox_bridge_->DestroySharedImage(
shared_buffer_->sync_token, std::move(shared_buffer_->shared_image));
}
}
void GraphicsDelegateAndroid::ClearBufferToBlack() {
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT);
}
} // namespace vr
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