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 #include "utils/StringUtils.h" 22 23 #include <GLES2/gl2.h> 24 #include <GLES2/gl2ext.h> 25 #include <utils/Log.h> 26 27 namespace android { 28 namespace uirenderer { 29 30 // Debug 31 #if DEBUG_EXTENSIONS 32 #define EXT_LOGD(...) ALOGD(__VA_ARGS__) 33 #else 34 #define EXT_LOGD(...) 35 #endif 36 37 38 Extensions::Extensions() { 39 auto extensions = StringUtils::split((const char*) glGetString(GL_EXTENSIONS)); 40 mHasNPot = extensions.has("GL_OES_texture_npot"); 41 mHasFramebufferFetch = extensions.has("GL_NV_shader_framebuffer_fetch"); 42 mHasDiscardFramebuffer = extensions.has("GL_EXT_discard_framebuffer"); 43 mHasDebugMarker = extensions.has("GL_EXT_debug_marker"); 44 mHas1BitStencil = extensions.has("GL_OES_stencil1"); 45 mHas4BitStencil = extensions.has("GL_OES_stencil4"); 46 mHasUnpackSubImage = extensions.has("GL_EXT_unpack_subimage"); 47 48 const char* version = (const char*) glGetString(GL_VERSION); 49 50 // Section 6.1.5 of the OpenGL ES specification indicates the GL version 51 // string strictly follows this format: 52 // 53 // OpenGL<space>ES<space><version number><space><vendor-specific information> 54 // 55 // In addition section 6.1.5 describes the version number thusly: 56 // 57 // "The version number is either of the form major number.minor number or 58 // major number.minor number.release number, where the numbers all have one 59 // or more digits. The release number and vendor specific information are 60 // optional." 61 62 if (sscanf(version, "OpenGL ES %d.%d", &mVersionMajor, &mVersionMinor) != 2) { 63 // If we cannot parse the version number, assume OpenGL ES 2.0 64 mVersionMajor = 2; 65 mVersionMinor = 0; 66 } 67 } 68 69 }; // namespace uirenderer 70 }; // namespace android 71
