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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_ANDROID_RESOURCES_ETC1_UTILS_H_
#define UI_ANDROID_RESOURCES_ETC1_UTILS_H_
#include "base/feature_list.h"
#include "third_party/skia/include/core/SkRefCnt.h"
#include "ui/android/ui_android_export.h"
namespace base {
class File;
} // namespace base
namespace gfx {
class Size;
} // namespace gfx
class SkBitmap;
class SkPixelRef;
namespace ui {
UI_ANDROID_EXPORT BASE_DECLARE_FEATURE(kCompressBitmapAtBackgroundPriority);
class UI_ANDROID_EXPORT Etc1 {
public:
// Compresses `raw_data` using ETC1 compression into an SkPixelRef. Can be
// called on any thread. Returns nullptr on failure.
// The compressed bitmap can then be used to create a UIResource.
static sk_sp<SkPixelRef> CompressBitmap(SkBitmap raw_data,
bool supports_etc_npot);
// Same as above, lowering the thread priority while compression is in
// progress. Only use in cases where latency is not important.
static sk_sp<SkPixelRef> CompressBitmapAtBackgroundPriority(
SkBitmap raw_data,
bool supports_etc_npot);
static bool WriteToFile(base::File* file,
const gfx::Size& content_size,
const float scale,
sk_sp<SkPixelRef> compressed_data);
static bool ReadFromFile(base::File* file,
gfx::Size* out_content_size,
float* out_scale,
sk_sp<SkPixelRef>* out_pixels);
};
}
#endif // UI_ANDROID_RESOURCES_ETC1_UTILS_H_
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