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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROIDFW_ATTRIBUTERESOLUTION_H
#define ANDROIDFW_ATTRIBUTERESOLUTION_H
#include <androidfw/ResourceTypes.h>
namespace android {
// Offsets into the outValues array populated by the methods below. outValues is a uint32_t
// array, but each logical element takes up 6 uint32_t-sized physical elements.
enum {
STYLE_NUM_ENTRIES = 6,
STYLE_TYPE = 0,
STYLE_DATA = 1,
STYLE_ASSET_COOKIE = 2,
STYLE_RESOURCE_ID = 3,
STYLE_CHANGING_CONFIGURATIONS = 4,
STYLE_DENSITY = 5
};
// These are all variations of the same method. They each perform the exact same operation,
// but on various data sources. I *think* they are re-written to avoid an extra branch
// in the inner loop, but after one branch miss (some pointer != null), the branch predictor should
// predict the rest of the iterations' branch correctly.
// TODO(adamlesinski): Run performance tests against these methods and a new, single method
// that uses all the sources and branches to the right ones within the inner loop.
bool ResolveAttrs(ResTable::Theme* theme, uint32_t def_style_attr, uint32_t def_style_res,
uint32_t* src_values, size_t src_values_length, uint32_t* attrs,
size_t attrs_length, uint32_t* out_values, uint32_t* out_indices);
bool ApplyStyle(ResTable::Theme* theme, ResXMLParser* xml_parser, uint32_t def_style_attr,
uint32_t def_style_res, uint32_t* attrs, size_t attrs_length, uint32_t* out_values,
uint32_t* out_indices);
bool RetrieveAttributes(const ResTable* res, ResXMLParser* xml_parser, uint32_t* attrs,
size_t attrs_length, uint32_t* out_values, uint32_t* out_indices);
} // namespace android
#endif /* ANDROIDFW_ATTRIBUTERESOLUTION_H */
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