1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 // Query.cpp: Implements the gl::Query class 16 17 #include "Query.h" 18 19 #include "main.h" 20 #include "Common/Thread.hpp" 21 22 namespace gl 23 { 24 Query(GLuint name,GLenum type)25Query::Query(GLuint name, GLenum type) : NamedObject(name) 26 { 27 mQuery = nullptr; 28 mStatus = GL_FALSE; 29 mResult = GL_FALSE; 30 mType = type; 31 } 32 ~Query()33Query::~Query() 34 { 35 delete mQuery; 36 } 37 begin()38void Query::begin() 39 { 40 if(!mQuery) 41 { 42 sw::Query::Type type; 43 switch(mType) 44 { 45 case GL_ANY_SAMPLES_PASSED: 46 case GL_ANY_SAMPLES_PASSED_CONSERVATIVE: 47 type = sw::Query::FRAGMENTS_PASSED; 48 break; 49 default: 50 ASSERT(false); 51 } 52 53 mQuery = new sw::Query(type); 54 55 if(!mQuery) 56 { 57 return error(GL_OUT_OF_MEMORY); 58 } 59 } 60 61 Device *device = getDevice(); 62 63 mQuery->begin(); 64 device->addQuery(mQuery); 65 device->setOcclusionEnabled(true); 66 } 67 end()68void Query::end() 69 { 70 if(!mQuery) 71 { 72 return error(GL_INVALID_OPERATION); 73 } 74 75 Device *device = getDevice(); 76 77 mQuery->end(); 78 device->removeQuery(mQuery); 79 device->setOcclusionEnabled(false); 80 81 mStatus = GL_FALSE; 82 mResult = GL_FALSE; 83 } 84 getResult()85GLuint Query::getResult() 86 { 87 if(mQuery) 88 { 89 while(!testQuery()) 90 { 91 sw::Thread::yield(); 92 } 93 } 94 95 return (GLuint)mResult; 96 } 97 isResultAvailable()98GLboolean Query::isResultAvailable() 99 { 100 if(mQuery) 101 { 102 testQuery(); 103 } 104 105 return mStatus; 106 } 107 getType() const108GLenum Query::getType() const 109 { 110 return mType; 111 } 112 testQuery()113GLboolean Query::testQuery() 114 { 115 if(mQuery && mStatus != GL_TRUE) 116 { 117 if(!mQuery->building && mQuery->reference == 0) 118 { 119 unsigned int numPixels = mQuery->data; 120 mStatus = GL_TRUE; 121 122 switch(mType) 123 { 124 case GL_ANY_SAMPLES_PASSED: 125 case GL_ANY_SAMPLES_PASSED_CONSERVATIVE: 126 mResult = (numPixels > 0) ? GL_TRUE : GL_FALSE; 127 break; 128 default: 129 ASSERT(false); 130 } 131 } 132 133 return mStatus; 134 } 135 136 return GL_TRUE; // Prevent blocking when query is null 137 } 138 } 139