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 "Debug.h" 18 #include "Extensions.h" 19 20 namespace android { 21 22 using namespace uirenderer; 23 ANDROID_SINGLETON_STATIC_INSTANCE(Extensions); 24 25 namespace uirenderer { 26 27 /////////////////////////////////////////////////////////////////////////////// 28 // Defines 29 /////////////////////////////////////////////////////////////////////////////// 30 31 // Debug 32 #if DEBUG_EXTENSIONS 33 #define EXT_LOGD(...) ALOGD(__VA_ARGS__) 34 #else 35 #define EXT_LOGD(...) 36 #endif 37 38 /////////////////////////////////////////////////////////////////////////////// 39 // Constructors 40 /////////////////////////////////////////////////////////////////////////////// 41 Extensions()42 Extensions::Extensions(): Singleton<Extensions>() { 43 const char* buffer = (const char*) glGetString(GL_EXTENSIONS); 44 const char* current = buffer; 45 const char* head = current; 46 EXT_LOGD("Available GL extensions:"); 47 do { 48 head = strchr(current, ' '); 49 String8 s(current, head ? head - current : strlen(current)); 50 if (s.length()) { 51 mExtensionList.add(s); 52 EXT_LOGD(" %s", s.string()); 53 } 54 current = head + 1; 55 } while (head); 56 57 mHasNPot = hasExtension("GL_OES_texture_npot"); 58 mHasFramebufferFetch = hasExtension("GL_NV_shader_framebuffer_fetch"); 59 mHasDiscardFramebuffer = hasExtension("GL_EXT_discard_framebuffer"); 60 mHasDebugMarker = hasExtension("GL_EXT_debug_marker"); 61 mHasDebugLabel = hasExtension("GL_EXT_debug_label"); 62 mHasTiledRendering = hasExtension("GL_QCOM_tiled_rendering"); 63 mHas1BitStencil = hasExtension("GL_OES_stencil1"); 64 mHas4BitStencil = hasExtension("GL_OES_stencil4"); 65 66 mExtensions = strdup(buffer); 67 68 const char* version = (const char*) glGetString(GL_VERSION); 69 mVersion = strdup(version); 70 71 // Section 6.1.5 of the OpenGL ES specification indicates the GL version 72 // string strictly follows this format: 73 // 74 // OpenGL<space>ES<space><version number><space><vendor-specific information> 75 // 76 // In addition section 6.1.5 describes the version number thusly: 77 // 78 // "The version number is either of the form major number.minor number or 79 // major number.minor number.release number, where the numbers all have one 80 // or more digits. The release number and vendor specific information are 81 // optional." 82 83 if (sscanf(version, "OpenGL ES %d.%d", &mVersionMajor, &mVersionMinor) !=2) { 84 // If we cannot parse the version number, assume OpenGL ES 2.0 85 mVersionMajor = 2; 86 mVersionMinor = 0; 87 } 88 } 89 ~Extensions()90 Extensions::~Extensions() { 91 free(mExtensions); 92 free(mVersion); 93 } 94 95 /////////////////////////////////////////////////////////////////////////////// 96 // Methods 97 /////////////////////////////////////////////////////////////////////////////// 98 hasExtension(const char * extension) const99 bool Extensions::hasExtension(const char* extension) const { 100 const String8 s(extension); 101 return mExtensionList.indexOf(s) >= 0; 102 } 103 dump() const104 void Extensions::dump() const { 105 ALOGD("%s", mVersion); 106 ALOGD("Supported extensions:\n%s", mExtensions); 107 } 108 109 }; // namespace uirenderer 110 }; // namespace android 111