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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "skia/ext/codec_utils.h"
#include "base/base64.h"
#include "base/check.h"
#include "skia/ext/skia_utils_base.h"
#include "skia/rusty_png_feature.h"
#include "third_party/skia/include/core/SkData.h"
#include "third_party/skia/include/core/SkImage.h"
#include "third_party/skia/include/core/SkPixmap.h"
#include "third_party/skia/include/core/SkStream.h"
#include "third_party/skia/include/encode/SkPngEncoder.h"
namespace skia {
namespace {
sk_sp<SkData> EncodePngAsSkData(const SkPixmap& src,
const SkPngEncoder::Options& options) {
SkDynamicMemoryWStream stream;
if (!skia::EncodePng(&stream, src, options)) {
return nullptr;
}
return stream.detachAsData();
}
} // namespace
sk_sp<SkData> EncodePngAsSkData(const SkPixmap& src) {
const SkPngEncoder::Options kDefaultOptions = {};
return EncodePngAsSkData(src, kDefaultOptions);
}
sk_sp<SkData> EncodePngAsSkData(GrDirectContext* context,
const SkImage* src,
int zlib_compression_level) {
if (!src) {
return nullptr;
}
sk_sp<SkImage> raster_image = src->makeRasterImage(context);
if (!raster_image) {
return nullptr;
}
SkPixmap pixmap;
bool success = raster_image->peekPixels(&pixmap);
// `peekPixels` should always succeed for raster images.
CHECK(success);
const SkPngEncoder::Options options = {.fZLibLevel = zlib_compression_level};
return EncodePngAsSkData(pixmap, options);
}
sk_sp<SkData> EncodePngAsSkData(GrDirectContext* context, const SkImage* src) {
// This is the default level in
// `third_party/skia/include/encode/SkPngEncoder.h`.
const int kDefaultZlibCompressionLevel = 6;
return EncodePngAsSkData(context, src, kDefaultZlibCompressionLevel);
}
std::string EncodePngAsDataUri(const SkPixmap& src) {
std::string result;
if (sk_sp<SkData> data = EncodePngAsSkData(src); data) {
result += "data:image/png;base64,";
result += base::Base64Encode(skia::as_byte_span(*data));
}
return result;
}
} // namespace skia
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