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// 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_MODULAR_MODULAR_IMAGE_H_
#define LIB_JXL_MODULAR_MODULAR_IMAGE_H_
#include <jxl/memory_manager.h>
#include <cstddef>
#include <cstdint>
#include <cstring>
#include <string>
#include <utility>
#include <vector>
#include "lib/jxl/base/compiler_specific.h"
#include "lib/jxl/base/data_parallel.h"
#include "lib/jxl/base/status.h"
#include "lib/jxl/image.h"
namespace jxl {
typedef int32_t pixel_type; // can use int16_t if it's only for 8-bit images.
// Need some wiggle room for YCoCg / Squeeze etc
typedef int64_t pixel_type_w;
namespace weighted {
struct Header;
}
class Channel {
public:
jxl::Plane<pixel_type> plane;
size_t w, h;
int hshift, vshift; // w ~= image.w >> hshift; h ~= image.h >> vshift
Channel(const Channel& other) = delete;
Channel& operator=(const Channel& other) = delete;
static StatusOr<Channel> Create(JxlMemoryManager* memory_manager, size_t iw,
size_t ih, int hsh = 0, int vsh = 0) {
JXL_ASSIGN_OR_RETURN(Plane<pixel_type> plane,
Plane<pixel_type>::Create(memory_manager, iw, ih));
return Channel(std::move(plane), iw, ih, hsh, vsh);
}
// Move assignment
Channel& operator=(Channel&& other) noexcept {
w = other.w;
h = other.h;
hshift = other.hshift;
vshift = other.vshift;
plane = std::move(other.plane);
return *this;
}
// Move constructor
Channel(Channel&& other) noexcept = default;
JxlMemoryManager* memory_manager() const { return plane.memory_manager(); };
Status shrink() {
if (plane.xsize() == w && plane.ysize() == h) return true;
JXL_ASSIGN_OR_RETURN(plane,
Plane<pixel_type>::Create(memory_manager(), w, h));
return true;
}
Status shrink(int nw, int nh) {
w = nw;
h = nh;
return shrink();
}
JXL_INLINE pixel_type* Row(const size_t y) { return plane.Row(y); }
JXL_INLINE const pixel_type* Row(const size_t y) const {
return plane.Row(y);
}
private:
Channel(jxl::Plane<pixel_type>&& p, size_t iw, size_t ih, int hsh, int vsh)
: plane(std::move(p)), w(iw), h(ih), hshift(hsh), vshift(vsh) {}
};
class Transform;
class Image {
public:
// image data, transforms can dramatically change the number of channels and
// their semantics
std::vector<Channel> channel;
// transforms that have been applied (and that have to be undone)
std::vector<Transform> transform;
// image dimensions (channels may have different dimensions due to transforms)
size_t w, h;
int bitdepth;
size_t nb_meta_channels; // first few channels might contain palette(s)
bool error; // true if a fatal error occurred, false otherwise
explicit Image(JxlMemoryManager* memory_manager);
Image(const Image& other) = delete;
Image& operator=(const Image& other) = delete;
Image& operator=(Image&& other) noexcept;
Image(Image&& other) noexcept = default;
static StatusOr<Image> Create(JxlMemoryManager* memory_manager, size_t iw,
size_t ih, int bitdepth, int nb_chans);
JxlMemoryManager* memory_manager() const { return memory_manager_; }
bool empty() const {
for (const auto& ch : channel) {
if (ch.w && ch.h) return false;
}
return true;
}
static StatusOr<Image> Clone(const Image& that);
void undo_transforms(const weighted::Header& wp_header,
jxl::ThreadPool* pool = nullptr);
std::string DebugString() const;
private:
Image(JxlMemoryManager* memory_manager, size_t iw, size_t ih, int bitdepth);
JxlMemoryManager* memory_manager_;
};
} // namespace jxl
#endif // LIB_JXL_MODULAR_MODULAR_IMAGE_H_