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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WebGLQuery.h"
#include "GLContext.h"
#include "mozilla/dom/WebGL2RenderingContextBinding.h"
#include "nsContentUtils.h"
#include "WebGLContext.h"
namespace mozilla {
class AvailableRunnable final : public Runnable
{
const RefPtr<WebGLQuery> mQuery;
public:
explicit AvailableRunnable(WebGLQuery* query)
: mQuery(query)
{ }
NS_IMETHOD Run() override {
mQuery->mCanBeAvailable = true;
return NS_OK;
}
};
////
static GLuint
GenQuery(gl::GLContext* gl)
{
gl->MakeCurrent();
GLuint ret = 0;
gl->fGenQueries(1, &ret);
return ret;
}
WebGLQuery::WebGLQuery(WebGLContext* webgl)
: WebGLRefCountedObject(webgl)
, mGLName(GenQuery(mContext->gl))
, mTarget(0)
, mActiveSlot(nullptr)
, mCanBeAvailable(false)
{
mContext->mQueries.insertBack(this);
}
void
WebGLQuery::Delete()
{
mContext->MakeContextCurrent();
mContext->gl->fDeleteQueries(1, &mGLName);
LinkedListElement<WebGLQuery>::removeFrom(mContext->mQueries);
}
////
static GLenum
TargetForDriver(const gl::GLContext* gl, GLenum target)
{
switch (target) {
case LOCAL_GL_ANY_SAMPLES_PASSED:
case LOCAL_GL_ANY_SAMPLES_PASSED_CONSERVATIVE:
break;
default:
return target;
}
if (gl->IsSupported(gl::GLFeature::occlusion_query_boolean))
return target;
if (gl->IsSupported(gl::GLFeature::occlusion_query2))
return LOCAL_GL_ANY_SAMPLES_PASSED;
return LOCAL_GL_SAMPLES_PASSED;
}
void
WebGLQuery::BeginQuery(GLenum target, WebGLRefPtr<WebGLQuery>& slot)
{
const char funcName[] = "beginQuery";
if (mTarget && target != mTarget) {
mContext->ErrorInvalidOperation("%s: Queries cannot change targets.", funcName);
return;
}
////
mTarget = target;
mActiveSlot = &slot;
*mActiveSlot = this;
////
const auto& gl = mContext->gl;
gl->MakeCurrent();
const auto driverTarget = TargetForDriver(gl, mTarget);
gl->fBeginQuery(driverTarget, mGLName);
}
void
WebGLQuery::EndQuery()
{
*mActiveSlot = nullptr;
mActiveSlot = nullptr;
mCanBeAvailable = false;
////
const auto& gl = mContext->gl;
gl->MakeCurrent();
const auto driverTarget = TargetForDriver(gl, mTarget);
gl->fEndQuery(driverTarget);
////
NS_DispatchToCurrentThread(new AvailableRunnable(this));
}
void
WebGLQuery::GetQueryParameter(GLenum pname, JS::MutableHandleValue retval) const
{
const char funcName[] = "getQueryParameter";
switch (pname) {
case LOCAL_GL_QUERY_RESULT_AVAILABLE:
case LOCAL_GL_QUERY_RESULT:
break;
default:
mContext->ErrorInvalidEnumArg(funcName, "pname", pname);
return;
}
if (!mTarget) {
mContext->ErrorInvalidOperation("%s: Query has never been active.", funcName);
return;
}
if (mActiveSlot)
return mContext->ErrorInvalidOperation("%s: Query is still active.", funcName);
// End of validation
////
// We must usually wait for an event loop before the query can be available.
const bool canBeAvailable = (mCanBeAvailable || gfxPrefs::WebGLImmediateQueries());
if (!canBeAvailable) {
if (pname == LOCAL_GL_QUERY_RESULT_AVAILABLE) {
retval.set(JS::BooleanValue(false));
}
return;
}
const auto& gl = mContext->gl;
gl->MakeCurrent();
uint64_t val = 0;
switch (pname) {
case LOCAL_GL_QUERY_RESULT_AVAILABLE:
gl->fGetQueryObjectuiv(mGLName, pname, (GLuint*)&val);
retval.set(JS::BooleanValue(bool(val)));
return;
case LOCAL_GL_QUERY_RESULT:
switch (mTarget) {
case LOCAL_GL_TIME_ELAPSED_EXT:
case LOCAL_GL_TIMESTAMP_EXT:
if (mContext->Has64BitTimestamps()) {
gl->fGetQueryObjectui64v(mGLName, pname, &val);
break;
}
MOZ_FALLTHROUGH;
default:
gl->fGetQueryObjectuiv(mGLName, LOCAL_GL_QUERY_RESULT, (GLuint*)&val);
break;
}
switch (mTarget) {
case LOCAL_GL_ANY_SAMPLES_PASSED:
case LOCAL_GL_ANY_SAMPLES_PASSED_CONSERVATIVE:
retval.set(JS::BooleanValue(bool(val)));
break;
case LOCAL_GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
case LOCAL_GL_TIME_ELAPSED_EXT:
case LOCAL_GL_TIMESTAMP_EXT:
retval.set(JS::NumberValue(val));
break;
default:
MOZ_CRASH("Bad `mTarget`.");
}
return;
default:
MOZ_CRASH("Bad `pname`.");
}
}
bool
WebGLQuery::IsQuery() const
{
MOZ_ASSERT(!IsDeleted());
if (!mTarget)
return false;
return true;
}
void
WebGLQuery::DeleteQuery()
{
MOZ_ASSERT(!IsDeleteRequested());
if (mActiveSlot) {
EndQuery();
}
RequestDelete();
}
void
WebGLQuery::QueryCounter(const char* funcName, GLenum target)
{
if (target != LOCAL_GL_TIMESTAMP_EXT) {
mContext->ErrorInvalidEnum("%s: `target` must be TIMESTAMP_EXT.", funcName,
target);
return;
}
if (mTarget && target != mTarget) {
mContext->ErrorInvalidOperation("%s: Queries cannot change targets.", funcName);
return;
}
mTarget = target;
mCanBeAvailable = false;
const auto& gl = mContext->gl;
gl->MakeCurrent();
gl->fQueryCounter(mGLName, mTarget);
NS_DispatchToCurrentThread(new AvailableRunnable(this));
}
////
JSObject*
WebGLQuery::WrapObject(JSContext* cx, JS::Handle<JSObject*> givenProto)
{
return dom::WebGLQueryBinding::Wrap(cx, this, givenProto);
}
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(WebGLQuery)
NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(WebGLQuery, AddRef)
NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(WebGLQuery, Release)
} // namespace mozilla
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