21efb6827c
PngCrunching now has a slightly better heuristic of choosing to encode an image as a palette or RGB. For small images, RGB compresses much better than a palette. The original PNG is used as-is (minus some optional chunks being stripped) if the resulting crunched PNG is larger than the original. 9-patch handling is abstracted away from PNGs, paving the way for other 9-patches, like WebP. TODO: handle PNGs with 9-patch chunks already present, which should just be passed through. This will allow for 3rd party tools to generate 9-patches. TODO: implement cheap transparency: when one color is used to represent transparent, and all other colors are opaque. Bug:30053276 Change-Id: I5167f53b91d1efa462d9f03d6b9108d9b541c0c1
45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "io/Io.h"
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#include <algorithm>
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#include <cstring>
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namespace aapt {
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namespace io {
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bool copy(OutputStream* out, InputStream* in) {
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const void* inBuffer;
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int inLen;
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while (in->Next(&inBuffer, &inLen)) {
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void* outBuffer;
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int outLen;
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if (!out->Next(&outBuffer, &outLen)) {
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return !out->HadError();
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}
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const int bytesToCopy = std::min(inLen, outLen);
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memcpy(outBuffer, inBuffer, bytesToCopy);
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out->BackUp(outLen - bytesToCopy);
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in->BackUp(inLen - bytesToCopy);
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}
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return !in->HadError();
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}
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} // namespace io
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} // namespace aapt
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