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// Copyright 2018 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/webgl/webgl2_compute_rendering_context.h"
#include <memory>
#include "gpu/command_buffer/client/gles2_interface.h"
#include "third_party/blink/public/platform/platform.h"
#include "third_party/blink/public/platform/web_graphics_context_3d_provider.h"
#include "third_party/blink/renderer/bindings/modules/v8/offscreen_rendering_context.h"
#include "third_party/blink/renderer/bindings/modules/v8/rendering_context.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/frame/local_frame_client.h"
#include "third_party/blink/renderer/core/frame/settings.h"
#include "third_party/blink/renderer/core/loader/frame_loader.h"
#include "third_party/blink/renderer/modules/webgl/ext_color_buffer_float.h"
#include "third_party/blink/renderer/modules/webgl/ext_disjoint_timer_query_webgl2.h"
#include "third_party/blink/renderer/modules/webgl/ext_texture_filter_anisotropic.h"
#include "third_party/blink/renderer/modules/webgl/oes_texture_float_linear.h"
#include "third_party/blink/renderer/modules/webgl/webgl_compressed_texture_astc.h"
#include "third_party/blink/renderer/modules/webgl/webgl_compressed_texture_etc.h"
#include "third_party/blink/renderer/modules/webgl/webgl_compressed_texture_etc1.h"
#include "third_party/blink/renderer/modules/webgl/webgl_compressed_texture_pvrtc.h"
#include "third_party/blink/renderer/modules/webgl/webgl_compressed_texture_s3tc.h"
#include "third_party/blink/renderer/modules/webgl/webgl_compressed_texture_s3tc_srgb.h"
#include "third_party/blink/renderer/modules/webgl/webgl_context_attribute_helpers.h"
#include "third_party/blink/renderer/modules/webgl/webgl_context_event.h"
#include "third_party/blink/renderer/modules/webgl/webgl_debug_renderer_info.h"
#include "third_party/blink/renderer/modules/webgl/webgl_debug_shaders.h"
#include "third_party/blink/renderer/modules/webgl/webgl_lose_context.h"
#include "third_party/blink/renderer/platform/graphics/gpu/drawing_buffer.h"
namespace blink {
// An helper function for the two create() methods. The return value is an
// indicate of whether the create() should return nullptr or not.
static bool ShouldCreateWebGL2ComputeContext(
WebGraphicsContext3DProvider* context_provider,
CanvasRenderingContextHost* host) {
if (!context_provider) {
host->HostDispatchEvent(WebGLContextEvent::Create(
EventTypeNames::webglcontextcreationerror,
"Failed to create a WebGL2 Compute context."));
return false;
}
gpu::gles2::GLES2Interface* gl = context_provider->ContextGL();
std::unique_ptr<Extensions3DUtil> extensions_util =
Extensions3DUtil::Create(gl);
if (!extensions_util)
return false;
if (extensions_util->SupportsExtension("GL_EXT_debug_marker")) {
String context_label(
String::Format("WebGL2ComputeRenderingContext-%p", context_provider));
gl->PushGroupMarkerEXT(0, context_label.Ascii().data());
}
return true;
}
CanvasRenderingContext* WebGL2ComputeRenderingContext::Factory::Create(
CanvasRenderingContextHost* host,
const CanvasContextCreationAttributesCore& attrs) {
bool using_gpu_compositing;
std::unique_ptr<WebGraphicsContext3DProvider> context_provider(
CreateWebGraphicsContext3DProvider(host, attrs,
Platform::kWebGL2ComputeContextType,
&using_gpu_compositing));
if (!ShouldCreateWebGL2ComputeContext(context_provider.get(), host))
return nullptr;
WebGL2ComputeRenderingContext* rendering_context =
new WebGL2ComputeRenderingContext(host, std::move(context_provider),
using_gpu_compositing, attrs);
if (!rendering_context->GetDrawingBuffer()) {
host->HostDispatchEvent(WebGLContextEvent::Create(
EventTypeNames::webglcontextcreationerror,
"Could not create a WebGL2 Compute context."));
return nullptr;
}
rendering_context->InitializeNewContext();
rendering_context->RegisterContextExtensions();
return rendering_context;
}
void WebGL2ComputeRenderingContext::Factory::OnError(HTMLCanvasElement* canvas,
const String& error) {
canvas->DispatchEvent(WebGLContextEvent::Create(
EventTypeNames::webglcontextcreationerror, error));
}
WebGL2ComputeRenderingContext::WebGL2ComputeRenderingContext(
CanvasRenderingContextHost* host,
std::unique_ptr<WebGraphicsContext3DProvider> context_provider,
bool using_gpu_compositing,
const CanvasContextCreationAttributesCore& requested_attributes)
: WebGL2ComputeRenderingContextBase(host,
std::move(context_provider),
using_gpu_compositing,
requested_attributes) {}
void WebGL2ComputeRenderingContext::SetCanvasGetContextResult(
RenderingContext& result) {
result.SetWebGL2ComputeRenderingContext(this);
}
void WebGL2ComputeRenderingContext::SetOffscreenCanvasGetContextResult(
OffscreenRenderingContext& result) {
result.SetWebGL2ComputeRenderingContext(this);
}
ImageBitmap* WebGL2ComputeRenderingContext::TransferToImageBitmap(
ScriptState* script_state) {
return TransferToImageBitmapBase(script_state);
}
void WebGL2ComputeRenderingContext::RegisterContextExtensions() {
// Register extensions.
RegisterExtension<EXTColorBufferFloat>(ext_color_buffer_float_);
RegisterExtension<EXTDisjointTimerQueryWebGL2>(
ext_disjoint_timer_query_web_gl2_);
RegisterExtension<EXTTextureFilterAnisotropic>(
ext_texture_filter_anisotropic_);
RegisterExtension<OESTextureFloatLinear>(oes_texture_float_linear_);
RegisterExtension<WebGLCompressedTextureASTC>(webgl_compressed_texture_astc_);
RegisterExtension<WebGLCompressedTextureETC>(webgl_compressed_texture_etc_);
RegisterExtension<WebGLCompressedTextureETC1>(webgl_compressed_texture_etc1_);
RegisterExtension<WebGLCompressedTexturePVRTC>(
webgl_compressed_texture_pvrtc_);
RegisterExtension<WebGLCompressedTextureS3TC>(webgl_compressed_texture_s3tc_);
RegisterExtension<WebGLCompressedTextureS3TCsRGB>(
webgl_compressed_texture_s3tc_srgb_);
RegisterExtension<WebGLDebugRendererInfo>(webgl_debug_renderer_info_);
RegisterExtension<WebGLDebugShaders>(webgl_debug_shaders_);
RegisterExtension<WebGLLoseContext>(webgl_lose_context_);
}
void WebGL2ComputeRenderingContext::Trace(blink::Visitor* visitor) {
visitor->Trace(ext_color_buffer_float_);
visitor->Trace(ext_disjoint_timer_query_web_gl2_);
visitor->Trace(ext_texture_filter_anisotropic_);
visitor->Trace(oes_texture_float_linear_);
visitor->Trace(webgl_compressed_texture_astc_);
visitor->Trace(webgl_compressed_texture_etc_);
visitor->Trace(webgl_compressed_texture_etc1_);
visitor->Trace(webgl_compressed_texture_pvrtc_);
visitor->Trace(webgl_compressed_texture_s3tc_);
visitor->Trace(webgl_compressed_texture_s3tc_srgb_);
visitor->Trace(webgl_debug_renderer_info_);
visitor->Trace(webgl_debug_shaders_);
visitor->Trace(webgl_lose_context_);
WebGL2ComputeRenderingContextBase::Trace(visitor);
}
} // namespace blink
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