106 lines
2.7 KiB
C++
106 lines
2.7 KiB
C++
/*
|
|
* Copyright (C) 2015 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 AAPT_PNG_H
|
|
#define AAPT_PNG_H
|
|
|
|
#include <iostream>
|
|
#include <string>
|
|
|
|
#include "android-base/macros.h"
|
|
|
|
#include "Diagnostics.h"
|
|
#include "Source.h"
|
|
#include "compile/Image.h"
|
|
#include "io/Io.h"
|
|
#include "process/IResourceTableConsumer.h"
|
|
#include "util/BigBuffer.h"
|
|
|
|
namespace aapt {
|
|
|
|
// Size in bytes of the PNG signature.
|
|
constexpr size_t kPngSignatureSize = 8u;
|
|
|
|
struct PngOptions {
|
|
int grayscale_tolerance = 0;
|
|
};
|
|
|
|
/**
|
|
* Deprecated. Removing once new PNG crunching code is proved to be correct.
|
|
*/
|
|
class Png {
|
|
public:
|
|
explicit Png(IDiagnostics* diag) : mDiag(diag) {}
|
|
|
|
bool process(const Source& source, std::istream* input, BigBuffer* outBuffer,
|
|
const PngOptions& options);
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(Png);
|
|
|
|
IDiagnostics* mDiag;
|
|
};
|
|
|
|
/**
|
|
* An InputStream that filters out unimportant PNG chunks.
|
|
*/
|
|
class PngChunkFilter : public io::InputStream {
|
|
public:
|
|
explicit PngChunkFilter(const android::StringPiece& data);
|
|
virtual ~PngChunkFilter() = default;
|
|
|
|
bool Next(const void** buffer, size_t* len) override;
|
|
void BackUp(size_t count) override;
|
|
|
|
bool CanRewind() const override { return true; }
|
|
bool Rewind() override;
|
|
size_t ByteCount() const override { return window_start_; }
|
|
|
|
bool HadError() const override {
|
|
return !error_msg_.empty();
|
|
}
|
|
std::string GetError() const override {
|
|
return error_msg_;
|
|
}
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(PngChunkFilter);
|
|
|
|
bool ConsumeWindow(const void** buffer, size_t* len);
|
|
|
|
android::StringPiece data_;
|
|
size_t window_start_ = 0;
|
|
size_t window_end_ = 0;
|
|
std::string error_msg_;
|
|
};
|
|
|
|
/**
|
|
* Reads a PNG from the InputStream into memory as an RGBA Image.
|
|
*/
|
|
std::unique_ptr<Image> ReadPng(IAaptContext* context, const Source& source, io::InputStream* in);
|
|
|
|
/**
|
|
* Writes the RGBA Image, with optional 9-patch meta-data, into the OutputStream
|
|
* as a PNG.
|
|
*/
|
|
bool WritePng(IAaptContext* context, const Image* image,
|
|
const NinePatch* nine_patch, io::OutputStream* out,
|
|
const PngOptions& options);
|
|
|
|
} // namespace aapt
|
|
|
|
#endif // AAPT_PNG_H
|