Extensions.cpp revision 016e0091d66781c131fbc29a156b464b1151c5c8
1/* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "Extensions.h" 18 19#include "Debug.h" 20#include "Properties.h" 21 22#include <EGL/egl.h> 23#include <EGL/eglext.h> 24#include <GLES2/gl2ext.h> 25#include <utils/Log.h> 26 27namespace android { 28 29using namespace uirenderer; 30ANDROID_SINGLETON_STATIC_INSTANCE(Extensions); 31 32namespace uirenderer { 33 34/////////////////////////////////////////////////////////////////////////////// 35// Defines 36/////////////////////////////////////////////////////////////////////////////// 37 38// Debug 39#if DEBUG_EXTENSIONS 40 #define EXT_LOGD(...) ALOGD(__VA_ARGS__) 41#else 42 #define EXT_LOGD(...) 43#endif 44 45/////////////////////////////////////////////////////////////////////////////// 46// Constructors 47/////////////////////////////////////////////////////////////////////////////// 48 49Extensions::Extensions() { 50 // Query GL extensions 51 findExtensions((const char*) glGetString(GL_EXTENSIONS), mGlExtensionList); 52 mHasNPot = hasGlExtension("GL_OES_texture_npot"); 53 mHasFramebufferFetch = hasGlExtension("GL_NV_shader_framebuffer_fetch"); 54 mHasDiscardFramebuffer = hasGlExtension("GL_EXT_discard_framebuffer"); 55 mHasDebugMarker = hasGlExtension("GL_EXT_debug_marker"); 56 mHasTiledRendering = hasGlExtension("GL_QCOM_tiled_rendering"); 57 mHas1BitStencil = hasGlExtension("GL_OES_stencil1"); 58 mHas4BitStencil = hasGlExtension("GL_OES_stencil4"); 59 mHasUnpackSubImage = hasGlExtension("GL_EXT_unpack_subimage"); 60 61 // Query EGL extensions 62 findExtensions(eglQueryString(eglGetCurrentDisplay(), EGL_EXTENSIONS), mEglExtensionList); 63 64 char property[PROPERTY_VALUE_MAX]; 65 if (property_get(PROPERTY_DEBUG_NV_PROFILING, property, nullptr) > 0) { 66 mHasNvSystemTime = !strcmp(property, "true") && hasEglExtension("EGL_NV_system_time"); 67 } else { 68 mHasNvSystemTime = false; 69 } 70 71 const char* version = (const char*) glGetString(GL_VERSION); 72 73 // Section 6.1.5 of the OpenGL ES specification indicates the GL version 74 // string strictly follows this format: 75 // 76 // OpenGL<space>ES<space><version number><space><vendor-specific information> 77 // 78 // In addition section 6.1.5 describes the version number thusly: 79 // 80 // "The version number is either of the form major number.minor number or 81 // major number.minor number.release number, where the numbers all have one 82 // or more digits. The release number and vendor specific information are 83 // optional." 84 85 if (sscanf(version, "OpenGL ES %d.%d", &mVersionMajor, &mVersionMinor) != 2) { 86 // If we cannot parse the version number, assume OpenGL ES 2.0 87 mVersionMajor = 2; 88 mVersionMinor = 0; 89 } 90} 91 92/////////////////////////////////////////////////////////////////////////////// 93// Methods 94/////////////////////////////////////////////////////////////////////////////// 95 96bool Extensions::hasGlExtension(const char* extension) const { 97 const String8 s(extension); 98 return mGlExtensionList.indexOf(s) >= 0; 99} 100 101bool Extensions::hasEglExtension(const char* extension) const { 102 const String8 s(extension); 103 return mEglExtensionList.indexOf(s) >= 0; 104} 105 106void Extensions::findExtensions(const char* extensions, SortedVector<String8>& list) const { 107 const char* current = extensions; 108 const char* head = current; 109 EXT_LOGD("Available extensions:"); 110 do { 111 head = strchr(current, ' '); 112 String8 s(current, head ? head - current : strlen(current)); 113 if (s.length()) { 114 list.add(s); 115 EXT_LOGD(" %s", s.string()); 116 } 117 current = head + 1; 118 } while (head); 119} 120 121void Extensions::dump() const { 122 ALOGD("%s", (const char*) glGetString(GL_VERSION)); 123 ALOGD("Supported GL extensions:\n%s", (const char*) glGetString(GL_EXTENSIONS)); 124 ALOGD("Supported EGL extensions:\n%s", eglQueryString(eglGetCurrentDisplay(), EGL_EXTENSIONS)); 125} 126 127}; // namespace uirenderer 128}; // namespace android 129