Extensions.cpp revision d41c4d8c732095ae99c955b6b82f7306633004b1
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#define LOG_TAG "OpenGLRenderer" 18 19#include <GLES2/gl2.h> 20#include <GLES2/gl2ext.h> 21 22#include <EGL/egl.h> 23#include <EGL/eglext.h> 24 25#include <utils/Log.h> 26 27#include "Debug.h" 28#include "Extensions.h" 29#include "Properties.h" 30 31namespace android { 32 33using namespace uirenderer; 34ANDROID_SINGLETON_STATIC_INSTANCE(Extensions); 35 36namespace uirenderer { 37 38/////////////////////////////////////////////////////////////////////////////// 39// Defines 40/////////////////////////////////////////////////////////////////////////////// 41 42// Debug 43#if DEBUG_EXTENSIONS 44 #define EXT_LOGD(...) ALOGD(__VA_ARGS__) 45#else 46 #define EXT_LOGD(...) 47#endif 48 49/////////////////////////////////////////////////////////////////////////////// 50// Constructors 51/////////////////////////////////////////////////////////////////////////////// 52 53Extensions::Extensions(): Singleton<Extensions>() { 54 // Query GL extensions 55 findExtensions((const char*) glGetString(GL_EXTENSIONS), mGlExtensionList); 56 mHasNPot = hasGlExtension("GL_OES_texture_npot"); 57 mHasFramebufferFetch = hasGlExtension("GL_NV_shader_framebuffer_fetch"); 58 mHasDiscardFramebuffer = hasGlExtension("GL_EXT_discard_framebuffer"); 59 mHasDebugMarker = hasGlExtension("GL_EXT_debug_marker"); 60 mHasDebugLabel = hasGlExtension("GL_EXT_debug_label"); 61 mHasTiledRendering = hasGlExtension("GL_QCOM_tiled_rendering"); 62 mHas1BitStencil = hasGlExtension("GL_OES_stencil1"); 63 mHas4BitStencil = hasGlExtension("GL_OES_stencil4"); 64 65 // Query EGL extensions 66 findExtensions(eglQueryString(eglGetCurrentDisplay(), EGL_EXTENSIONS), mEglExtensionList); 67 68 char property[PROPERTY_VALUE_MAX]; 69 if (property_get(PROPERTY_DEBUG_NV_PROFILING, property, nullptr) > 0) { 70 mHasNvSystemTime = !strcmp(property, "true") && hasEglExtension("EGL_NV_system_time"); 71 } else { 72 mHasNvSystemTime = false; 73 } 74 75 const char* version = (const char*) glGetString(GL_VERSION); 76 77 // Section 6.1.5 of the OpenGL ES specification indicates the GL version 78 // string strictly follows this format: 79 // 80 // OpenGL<space>ES<space><version number><space><vendor-specific information> 81 // 82 // In addition section 6.1.5 describes the version number thusly: 83 // 84 // "The version number is either of the form major number.minor number or 85 // major number.minor number.release number, where the numbers all have one 86 // or more digits. The release number and vendor specific information are 87 // optional." 88 89 if (sscanf(version, "OpenGL ES %d.%d", &mVersionMajor, &mVersionMinor) != 2) { 90 // If we cannot parse the version number, assume OpenGL ES 2.0 91 mVersionMajor = 2; 92 mVersionMinor = 0; 93 } 94} 95 96Extensions::~Extensions() { 97} 98 99/////////////////////////////////////////////////////////////////////////////// 100// Methods 101/////////////////////////////////////////////////////////////////////////////// 102 103bool Extensions::hasGlExtension(const char* extension) const { 104 const String8 s(extension); 105 return mGlExtensionList.indexOf(s) >= 0; 106} 107 108bool Extensions::hasEglExtension(const char* extension) const { 109 const String8 s(extension); 110 return mEglExtensionList.indexOf(s) >= 0; 111} 112 113void Extensions::findExtensions(const char* extensions, SortedVector<String8>& list) const { 114 const char* current = extensions; 115 const char* head = current; 116 EXT_LOGD("Available extensions:"); 117 do { 118 head = strchr(current, ' '); 119 String8 s(current, head ? head - current : strlen(current)); 120 if (s.length()) { 121 list.add(s); 122 EXT_LOGD(" %s", s.string()); 123 } 124 current = head + 1; 125 } while (head); 126} 127 128void Extensions::dump() const { 129 ALOGD("%s", (const char*) glGetString(GL_VERSION)); 130 ALOGD("Supported GL extensions:\n%s", (const char*) glGetString(GL_EXTENSIONS)); 131 ALOGD("Supported EGL extensions:\n%s", eglQueryString(eglGetCurrentDisplay(), EGL_EXTENSIONS)); 132} 133 134}; // namespace uirenderer 135}; // namespace android 136