// Copyright 2016 The SwiftShader Authors. All Rights Reserved. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. // Query.cpp: Implements the gl::Query class #include "Query.h" #include "main.h" #include "Common/Thread.hpp" namespace gl { Query::Query(GLuint name, GLenum type) : NamedObject(name) { mQuery = nullptr; mStatus = GL_FALSE; mResult = GL_FALSE; mType = type; } Query::~Query() { delete mQuery; } void Query::begin() { if(!mQuery) { sw::Query::Type type; switch(mType) { case GL_ANY_SAMPLES_PASSED: case GL_ANY_SAMPLES_PASSED_CONSERVATIVE: type = sw::Query::FRAGMENTS_PASSED; break; default: ASSERT(false); } mQuery = new sw::Query(type); if(!mQuery) { return error(GL_OUT_OF_MEMORY); } } Device *device = getDevice(); mQuery->begin(); device->addQuery(mQuery); device->setOcclusionEnabled(true); } void Query::end() { if(!mQuery) { return error(GL_INVALID_OPERATION); } Device *device = getDevice(); mQuery->end(); device->removeQuery(mQuery); device->setOcclusionEnabled(false); mStatus = GL_FALSE; mResult = GL_FALSE; } GLuint Query::getResult() { if(mQuery) { while(!testQuery()) { sw::Thread::yield(); } } return (GLuint)mResult; } GLboolean Query::isResultAvailable() { if(mQuery) { testQuery(); } return mStatus; } GLenum Query::getType() const { return mType; } GLboolean Query::testQuery() { if(mQuery && mStatus != GL_TRUE) { if(!mQuery->building && mQuery->reference == 0) { unsigned int numPixels = mQuery->data; mStatus = GL_TRUE; switch(mType) { case GL_ANY_SAMPLES_PASSED: case GL_ANY_SAMPLES_PASSED_CONSERVATIVE: mResult = (numPixels > 0) ? GL_TRUE : GL_FALSE; break; default: ASSERT(false); } } return mStatus; } return GL_TRUE; // Prevent blocking when query is null } }