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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/webgpu/gpu_canvas_context.h"
#include "third_party/blink/renderer/bindings/modules/v8/rendering_context.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_gpu_swap_chain_descriptor.h"
#include "third_party/blink/renderer/modules/webgpu/dawn_conversions.h"
#include "third_party/blink/renderer/modules/webgpu/gpu_device.h"
namespace blink {
GPUCanvasContext::Factory::Factory() {}
GPUCanvasContext::Factory::~Factory() {}
CanvasRenderingContext* GPUCanvasContext::Factory::Create(
CanvasRenderingContextHost* host,
const CanvasContextCreationAttributesCore& attrs) {
CanvasRenderingContext* rendering_context =
MakeGarbageCollected<GPUCanvasContext>(host, attrs);
DCHECK(host);
rendering_context->RecordUKMCanvasRenderingAPI(
CanvasRenderingContext::CanvasRenderingAPI::kWebgpu);
return rendering_context;
}
CanvasRenderingContext::ContextType GPUCanvasContext::Factory::GetContextType()
const {
return CanvasRenderingContext::kContextGPUPresent;
}
GPUCanvasContext::GPUCanvasContext(
CanvasRenderingContextHost* host,
const CanvasContextCreationAttributesCore& attrs)
: CanvasRenderingContext(host, attrs) {}
GPUCanvasContext::~GPUCanvasContext() {}
void GPUCanvasContext::Trace(Visitor* visitor) const {
visitor->Trace(swapchain_);
CanvasRenderingContext::Trace(visitor);
}
const IntSize& GPUCanvasContext::CanvasSize() const {
return Host()->Size();
}
// CanvasRenderingContext implementation
CanvasRenderingContext::ContextType GPUCanvasContext::GetContextType() const {
return CanvasRenderingContext::kContextGPUPresent;
}
void GPUCanvasContext::SetCanvasGetContextResult(RenderingContext& result) {
result.SetGPUCanvasContext(this);
}
void GPUCanvasContext::Stop() {
if (swapchain_) {
swapchain_->Neuter();
swapchain_ = nullptr;
}
stopped_ = true;
}
cc::Layer* GPUCanvasContext::CcLayer() const {
if (swapchain_) {
return swapchain_->CcLayer();
}
return nullptr;
}
void GPUCanvasContext::SetFilterQuality(SkFilterQuality filter_quality) {
if (filter_quality != filter_quality_) {
filter_quality_ = filter_quality;
if (swapchain_) {
swapchain_->SetFilterQuality(filter_quality);
}
}
}
// gpu_canvas_context.idl
GPUSwapChain* GPUCanvasContext::configureSwapChain(
const GPUSwapChainDescriptor* descriptor,
ExceptionState& exception_state) {
if (stopped_) {
// This is probably not possible, or at least would only happen during page
// shutdown.
exception_state.ThrowDOMException(DOMExceptionCode::kUnknownError,
"canvas has been destroyed");
return nullptr;
}
if (swapchain_) {
// Tell any previous swapchain that it will no longer be used and can
// destroy all its resources (and produce errors when used).
swapchain_->Neuter();
}
WGPUTextureUsage usage = AsDawnEnum<WGPUTextureUsage>(descriptor->usage());
WGPUTextureFormat format =
AsDawnEnum<WGPUTextureFormat>(descriptor->format());
switch (format) {
case WGPUTextureFormat_BGRA8Unorm:
break;
case WGPUTextureFormat_RGBA8Unorm:
if ((usage & WGPUTextureUsage_OutputAttachment) != usage) {
exception_state.ThrowDOMException(
DOMExceptionCode::kOperationError,
"rgba8unorm can only support OUTPUT_ATTACHMENT usage");
}
descriptor->device()->AddConsoleWarning(
"rgba8unorm swap chain is deprecated (for now); use bgra8unorm");
break;
case WGPUTextureFormat_RGBA16Float:
exception_state.ThrowDOMException(
DOMExceptionCode::kUnknownError,
"rgba16float swap chain is not yet supported");
return nullptr;
default:
exception_state.ThrowDOMException(DOMExceptionCode::kOperationError,
"unsupported swap chain format");
return nullptr;
}
swapchain_ = MakeGarbageCollected<GPUSwapChain>(
this, descriptor->device(), usage, format, filter_quality_);
return swapchain_;
}
ScriptPromise GPUCanvasContext::getSwapChainPreferredFormat(
ScriptState* script_state,
const GPUDevice* device) {
ScriptPromiseResolver* resolver =
MakeGarbageCollected<ScriptPromiseResolver>(script_state);
ScriptPromise promise = resolver->Promise();
// TODO(crbug.com/1007166): Return actual preferred format for the swap chain.
resolver->Resolve("bgra8unorm");
return promise;
}
} // namespace blink
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