Extensions.cpp revision 8762e332e3797fb41929a1c6069207f4906ca329
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 26#include <utils/Log.h> 27 28namespace android { 29namespace uirenderer { 30 31// Debug 32#if DEBUG_EXTENSIONS 33 #define EXT_LOGD(...) ALOGD(__VA_ARGS__) 34#else 35 #define EXT_LOGD(...) 36#endif 37 38 39Extensions::Extensions() { 40 auto extensions = StringUtils::split((const char*) glGetString(GL_EXTENSIONS)); 41 mHasNPot = extensions.has("GL_OES_texture_npot"); 42 mHasFramebufferFetch = extensions.has("GL_NV_shader_framebuffer_fetch"); 43 mHasDiscardFramebuffer = extensions.has("GL_EXT_discard_framebuffer"); 44 mHasDebugMarker = extensions.has("GL_EXT_debug_marker"); 45 mHas1BitStencil = extensions.has("GL_OES_stencil1"); 46 mHas4BitStencil = extensions.has("GL_OES_stencil4"); 47 mHasUnpackSubImage = extensions.has("GL_EXT_unpack_subimage"); 48 49#ifdef ANDROID_ENABLE_LINEAR_BLENDING 50 mHasSRGB = mVersionMajor >= 3 || extensions.has("GL_EXT_sRGB"); 51 mHasSRGBWriteControl = extensions.has("GL_EXT_sRGB_write_control"); 52 53 // If linear blending is enabled, the device must have (ES3.0 or EXT_sRGB) 54 // and EXT_sRGB_write_control 55 LOG_ALWAYS_FATAL_IF(!mHasSRGB, "Linear blending requires ES 3.0 or EXT_sRGB"); 56 LOG_ALWAYS_FATAL_IF(!mHasSRGBWriteControl, "Linear blending requires EXT_sRGB_write_control"); 57#else 58 mHasSRGB = false; 59 mHasSRGBWriteControl = false; 60#endif 61 62 const char* version = (const char*) glGetString(GL_VERSION); 63 64 // Section 6.1.5 of the OpenGL ES specification indicates the GL version 65 // string strictly follows this format: 66 // 67 // OpenGL<space>ES<space><version number><space><vendor-specific information> 68 // 69 // In addition section 6.1.5 describes the version number thusly: 70 // 71 // "The version number is either of the form major number.minor number or 72 // major number.minor number.release number, where the numbers all have one 73 // or more digits. The release number and vendor specific information are 74 // optional." 75 76 if (sscanf(version, "OpenGL ES %d.%d", &mVersionMajor, &mVersionMinor) != 2) { 77 // If we cannot parse the version number, assume OpenGL ES 2.0 78 mVersionMajor = 2; 79 mVersionMinor = 0; 80 } 81} 82 83}; // namespace uirenderer 84}; // namespace android 85