1 /* 2 * Copyright (C) 2010 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 #ifndef ANDROID_HWUI_EXTENSIONS_H 18 #define ANDROID_HWUI_EXTENSIONS_H 19 20 #include <utils/SortedVector.h> 21 #include <utils/String8.h> 22 23 #include <GLES2/gl2.h> 24 #include <GLES2/gl2ext.h> 25 26 #include "Debug.h" 27 28 namespace android { 29 namespace uirenderer { 30 31 /////////////////////////////////////////////////////////////////////////////// 32 // Defines 33 /////////////////////////////////////////////////////////////////////////////// 34 35 // Debug 36 #if DEBUG_EXTENSIONS 37 #define EXT_LOGD(...) LOGD(__VA_ARGS__) 38 #else 39 #define EXT_LOGD(...) 40 #endif 41 42 // Vendor strings 43 44 #define VENDOR_IMG "Imagination Technologies" 45 46 /////////////////////////////////////////////////////////////////////////////// 47 // Classes 48 /////////////////////////////////////////////////////////////////////////////// 49 50 class Extensions { 51 public: Extensions()52 Extensions() { 53 const char* buffer = (const char*) glGetString(GL_EXTENSIONS); 54 const char* current = buffer; 55 const char* head = current; 56 EXT_LOGD("Available GL extensions:"); 57 do { 58 head = strchr(current, ' '); 59 String8 s(current, head ? head - current : strlen(current)); 60 if (s.length()) { 61 mExtensionList.add(s); 62 EXT_LOGD(" %s", s.string()); 63 } 64 current = head + 1; 65 } while (head); 66 67 mHasNPot = hasExtension("GL_OES_texture_npot"); 68 mHasFramebufferFetch = hasExtension("GL_NV_shader_framebuffer_fetch"); 69 70 const char* vendor = (const char*) glGetString(GL_VENDOR); 71 EXT_LOGD("Vendor: %s", vendor); 72 mNeedsHighpTexCoords = strcmp(vendor, VENDOR_IMG) == 0; 73 74 // We don't need to copy the string, the OpenGL ES spec 75 // guarantees the result of glGetString to point to a 76 // static string as long as our OpenGL context is valid 77 mExtensions = buffer; 78 } 79 hasNPot()80 inline bool hasNPot() const { return mHasNPot; } hasFramebufferFetch()81 inline bool hasFramebufferFetch() const { return mHasFramebufferFetch; } needsHighpTexCoords()82 inline bool needsHighpTexCoords() const { return mNeedsHighpTexCoords; } 83 hasExtension(const char * extension)84 bool hasExtension(const char* extension) const { 85 const String8 s(extension); 86 return mExtensionList.indexOf(s) >= 0; 87 } 88 dump()89 void dump() { 90 LOGD("Supported extensions:\n%s", mExtensions); 91 } 92 93 private: 94 SortedVector<String8> mExtensionList; 95 96 const char* mExtensions; 97 98 bool mHasNPot; 99 bool mNeedsHighpTexCoords; 100 bool mHasFramebufferFetch; 101 }; // class Extensions 102 103 }; // namespace uirenderer 104 }; // namespace android 105 106 #endif // ANDROID_HWUI_EXTENSIONS_H 107