1 /* 2 * Copyright (C) 2016 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 ANDROIDFW_ATTRIBUTERESOLUTION_H 18 #define ANDROIDFW_ATTRIBUTERESOLUTION_H 19 20 #include "androidfw/AssetManager2.h" 21 #include "androidfw/ResourceTypes.h" 22 23 namespace android { 24 25 // Offsets into the outValues array populated by the methods below. outValues is a uint32_t 26 // array, but each logical element takes up 6 uint32_t-sized physical elements. 27 enum { 28 STYLE_NUM_ENTRIES = 6, 29 STYLE_TYPE = 0, 30 STYLE_DATA = 1, 31 STYLE_ASSET_COOKIE = 2, 32 STYLE_RESOURCE_ID = 3, 33 STYLE_CHANGING_CONFIGURATIONS = 4, 34 STYLE_DENSITY = 5 35 }; 36 37 // These are all variations of the same method. They each perform the exact same operation, 38 // but on various data sources. I *think* they are re-written to avoid an extra branch 39 // in the inner loop, but after one branch miss (some pointer != null), the branch predictor should 40 // predict the rest of the iterations' branch correctly. 41 // TODO(adamlesinski): Run performance tests against these methods and a new, single method 42 // that uses all the sources and branches to the right ones within the inner loop. 43 44 // `out_values` must NOT be nullptr. 45 // `out_indices` may be nullptr. 46 bool ResolveAttrs(Theme* theme, uint32_t def_style_attr, uint32_t def_style_resid, 47 uint32_t* src_values, size_t src_values_length, uint32_t* attrs, 48 size_t attrs_length, uint32_t* out_values, uint32_t* out_indices); 49 50 // `out_values` must NOT be nullptr. 51 // `out_indices` is NOT optional and must NOT be nullptr. 52 void ApplyStyle(Theme* theme, ResXMLParser* xml_parser, uint32_t def_style_attr, 53 uint32_t def_style_resid, const uint32_t* attrs, size_t attrs_length, 54 uint32_t* out_values, uint32_t* out_indices); 55 56 // `out_values` must NOT be nullptr. 57 // `out_indices` may be nullptr. 58 bool RetrieveAttributes(AssetManager2* assetmanager, ResXMLParser* xml_parser, uint32_t* attrs, 59 size_t attrs_length, uint32_t* out_values, uint32_t* out_indices); 60 61 } // namespace android 62 63 #endif /* ANDROIDFW_ATTRIBUTERESOLUTION_H */ 64
