// Copyright (c) the JPEG XL Project Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#ifndef LIB_JXL_DEC_GROUP_BORDER_H_
#define LIB_JXL_DEC_GROUP_BORDER_H_
#include <atomic>
#include <cstddef>
#include <cstdint>
#include <vector>
#include "lib/jxl/base/rect.h"
#include "lib/jxl/frame_dimensions.h"
namespace jxl {
class GroupBorderAssigner {
public:
// Prepare the GroupBorderAssigner to handle a given frame.
void Init(
const FrameDimensions& frame_dim);
// Marks a group as done, and returns the (at most 3) rects to run
// FinalizeImageRect on. `block_rect` must be the rect corresponding
// to the given `group_id`, measured in blocks.
void GroupDone(size_t group_id, size_t padx, size_t pady,
Rect* rects_to_finalize, size_t* num_to_finalize);
// Marks a group as not-done, for running re-paints.
void ClearDone(size_t group_id);
static constexpr size_t kMaxToFinalize = 3;
private:
FrameDimensions frame_dim_;
std::vector<std::atomic<uint8_t>> counters_;
// Constants to identify group positions relative to the corners.
static constexpr uint8_t kTopLeft = 0x01;
static constexpr uint8_t kTopRight = 0x02;
static constexpr uint8_t kBottomRight = 0x04;
static constexpr uint8_t kBottomLeft = 0x08;
};
}
// namespace jxl
#endif // LIB_JXL_DEC_GROUP_BORDER_H_
