Cppcheck report - Godot - branch: master, commit: 216b3302f318c32a5dcf250293d90e47e712e8e9 (2024-12-22): scene/resources/compressed_texture.cpp

/**************************************************************************/
/*  compressed_texture.cpp                                                */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#include "compressed_texture.h"

#include "scene/resources/bit_map.h"

Error CompressedTexture2D::_load_data(const String &p_path, int &r_width, int &r_height, Ref<Image> &image, bool &r_request_3d, bool &r_request_normal, bool &r_request_roughness, int &mipmap_limit, int p_size_limit) {
	alpha_cache.unref();

	ERR_FAIL_COND_V(image.is_null(), ERR_INVALID_PARAMETER);

	Ref<FileAccess> f = FileAccess::open(p_path, FileAccess::READ);
	ERR_FAIL_COND_V_MSG(f.is_null(), ERR_CANT_OPEN, vformat("Unable to open file: %s.", p_path));

	uint8_t header[4];
	f->get_buffer(header, 4);
	if (header[0] != 'G' || header[1] != 'S' || header[2] != 'T' || header[3] != '2') {
		ERR_FAIL_V_MSG(ERR_FILE_CORRUPT, "Compressed texture file is corrupt (Bad header).");
	}

	uint32_t version = f->get_32();

	if (version > FORMAT_VERSION) {
		ERR_FAIL_V_MSG(ERR_FILE_CORRUPT, "Compressed texture file is too new.");
	}
	r_width = f->get_32();
	r_height = f->get_32();
	uint32_t df = f->get_32(); //data format

	//skip reserved
	mipmap_limit = int(f->get_32());
	//reserved
	f->get_32();
	f->get_32();
	f->get_32();

#ifdef TOOLS_ENABLED

	r_request_3d = request_3d_callback && df & FORMAT_BIT_DETECT_3D;
	r_request_roughness = request_roughness_callback && df & FORMAT_BIT_DETECT_ROUGNESS;
	r_request_normal = request_normal_callback && df & FORMAT_BIT_DETECT_NORMAL;

#else

	r_request_3d = false;
	r_request_roughness = false;
	r_request_normal = false;

#endif
	if (!(df & FORMAT_BIT_STREAM)) {
		p_size_limit = 0;
	}

	image = load_image_from_file(f, p_size_limit);

	if (image.is_null() || image->is_empty()) {
		return ERR_CANT_OPEN;
	}

	return OK;
}

void CompressedTexture2D::set_path(const String &p_path, bool p_take_over) {
	if (texture.is_valid()) {
		RenderingServer::get_singleton()->texture_set_path(texture, p_path);
	}

	Resource::set_path(p_path, p_take_over);
}

void CompressedTexture2D::_requested_3d(void *p_ud) {
	CompressedTexture2D *ct = (CompressedTexture2D *)p_ud;
<--- C-style pointer casting [+]
C-style pointer casting detected. C++ offers four different kinds of casts as replacements: static_cast, const_cast, dynamic_cast and reinterpret_cast. A C-style cast could evaluate to any of those automatically, thus it is considered safer if the programmer explicitly states which kind of cast is expected. See also: https://www.securecoding.cert.org/confluence/display/cplusplus/EXP05-CPP.+Do+not+use+C-style+casts.
	Ref<CompressedTexture2D> ctex(ct);
	ERR_FAIL_NULL(request_3d_callback);
	request_3d_callback(ctex);
}

void CompressedTexture2D::_requested_roughness(void *p_ud, const String &p_normal_path, RS::TextureDetectRoughnessChannel p_roughness_channel) {
	CompressedTexture2D *ct = (CompressedTexture2D *)p_ud;
<--- C-style pointer casting [+]
C-style pointer casting detected. C++ offers four different kinds of casts as replacements: static_cast, const_cast, dynamic_cast and reinterpret_cast. A C-style cast could evaluate to any of those automatically, thus it is considered safer if the programmer explicitly states which kind of cast is expected. See also: https://www.securecoding.cert.org/confluence/display/cplusplus/EXP05-CPP.+Do+not+use+C-style+casts.
	Ref<CompressedTexture2D> ctex(ct);
	ERR_FAIL_NULL(request_roughness_callback);
	request_roughness_callback(ctex, p_normal_path, p_roughness_channel);
}

void CompressedTexture2D::_requested_normal(void *p_ud) {
	CompressedTexture2D *ct = (CompressedTexture2D *)p_ud;
<--- C-style pointer casting [+]
C-style pointer casting detected. C++ offers four different kinds of casts as replacements: static_cast, const_cast, dynamic_cast and reinterpret_cast. A C-style cast could evaluate to any of those automatically, thus it is considered safer if the programmer explicitly states which kind of cast is expected. See also: https://www.securecoding.cert.org/confluence/display/cplusplus/EXP05-CPP.+Do+not+use+C-style+casts.
	Ref<CompressedTexture2D> ctex(ct);
	ERR_FAIL_NULL(request_normal_callback);
	request_normal_callback(ctex);
}

CompressedTexture2D::TextureFormatRequestCallback CompressedTexture2D::request_3d_callback = nullptr;
CompressedTexture2D::TextureFormatRoughnessRequestCallback CompressedTexture2D::request_roughness_callback = nullptr;
CompressedTexture2D::TextureFormatRequestCallback CompressedTexture2D::request_normal_callback = nullptr;

Image::Format CompressedTexture2D::get_format() const {
	return format;
}

Error CompressedTexture2D::load(const String &p_path) {
	int lw, lh;
	Ref<Image> image;
	image.instantiate();

	bool request_3d;
	bool request_normal;
	bool request_roughness;
	int mipmap_limit;

	Error err = _load_data(p_path, lw, lh, image, request_3d, request_normal, request_roughness, mipmap_limit);
	if (err) {
		return err;
	}

	if (texture.is_valid()) {
		RID new_texture = RS::get_singleton()->texture_2d_create(image);
		RS::get_singleton()->texture_replace(texture, new_texture);
	} else {
		texture = RS::get_singleton()->texture_2d_create(image);
	}
	if (lw || lh) {
		RS::get_singleton()->texture_set_size_override(texture, lw, lh);
	}

	w = lw;
	h = lh;
	path_to_file = p_path;
	format = image->get_format();

	if (get_path().is_empty()) {
		//temporarily set path if no path set for resource, helps find errors
		RenderingServer::get_singleton()->texture_set_path(texture, p_path);
	}

#ifdef TOOLS_ENABLED

	if (request_3d) {
		//print_line("request detect 3D at " + p_path);
		RS::get_singleton()->texture_set_detect_3d_callback(texture, _requested_3d, this);
	} else {
		//print_line("not requesting detect 3D at " + p_path);
		RS::get_singleton()->texture_set_detect_3d_callback(texture, nullptr, nullptr);
	}

	if (request_roughness) {
		//print_line("request detect srgb at " + p_path);
		RS::get_singleton()->texture_set_detect_roughness_callback(texture, _requested_roughness, this);
	} else {
		//print_line("not requesting detect srgb at " + p_path);
		RS::get_singleton()->texture_set_detect_roughness_callback(texture, nullptr, nullptr);
	}

	if (request_normal) {
		//print_line("request detect srgb at " + p_path);
		RS::get_singleton()->texture_set_detect_normal_callback(texture, _requested_normal, this);
	} else {
		//print_line("not requesting detect normal at " + p_path);
		RS::get_singleton()->texture_set_detect_normal_callback(texture, nullptr, nullptr);
	}

#endif
	notify_property_list_changed();
	emit_changed();
	return OK;
}

String CompressedTexture2D::get_load_path() const {
	return path_to_file;
}

int CompressedTexture2D::get_width() const {
	return w;
}

int CompressedTexture2D::get_height() const {
	return h;
}

RID CompressedTexture2D::get_rid() const {
	if (!texture.is_valid()) {
		texture = RS::get_singleton()->texture_2d_placeholder_create();
	}
	return texture;
}

void CompressedTexture2D::draw(RID p_canvas_item, const Point2 &p_pos, const Color &p_modulate, bool p_transpose) const {
	if ((w | h) == 0) {
		return;
	}
	RenderingServer::get_singleton()->canvas_item_add_texture_rect(p_canvas_item, Rect2(p_pos, Size2(w, h)), texture, false, p_modulate, p_transpose);
}

void CompressedTexture2D::draw_rect(RID p_canvas_item, const Rect2 &p_rect, bool p_tile, const Color &p_modulate, bool p_transpose) const {
	if ((w | h) == 0) {
		return;
	}
	RenderingServer::get_singleton()->canvas_item_add_texture_rect(p_canvas_item, p_rect, texture, p_tile, p_modulate, p_transpose);
}

void CompressedTexture2D::draw_rect_region(RID p_canvas_item, const Rect2 &p_rect, const Rect2 &p_src_rect, const Color &p_modulate, bool p_transpose, bool p_clip_uv) const {
	if ((w | h) == 0) {
		return;
	}
	RenderingServer::get_singleton()->canvas_item_add_texture_rect_region(p_canvas_item, p_rect, texture, p_src_rect, p_modulate, p_transpose, p_clip_uv);
}

bool CompressedTexture2D::has_alpha() const {
	return false;
}

Ref<Image> CompressedTexture2D::get_image() const {
	if (texture.is_valid()) {
		return RS::get_singleton()->texture_2d_get(texture);
	} else {
		return Ref<Image>();
	}
}

bool CompressedTexture2D::is_pixel_opaque(int p_x, int p_y) const {
	if (!alpha_cache.is_valid()) {
		Ref<Image> img = get_image();
		if (img.is_valid()) {
			if (img->is_compressed()) { //must decompress, if compressed
				Ref<Image> decom = img->duplicate();
				decom->decompress();
				img = decom;
			}

			alpha_cache.instantiate();
			alpha_cache->create_from_image_alpha(img);
		}
	}

	if (alpha_cache.is_valid()) {
		int aw = int(alpha_cache->get_size().width);
		int ah = int(alpha_cache->get_size().height);
		if (aw == 0 || ah == 0) {
			return true;
		}

		int x = p_x * aw / w;
		int y = p_y * ah / h;

		x = CLAMP(x, 0, aw);
		y = CLAMP(y, 0, ah);

		return alpha_cache->get_bit(x, y);
	}

	return true;
}

void CompressedTexture2D::reload_from_file() {
	String path = get_path();
	if (!path.is_resource_file()) {
		return;
	}

	path = ResourceLoader::path_remap(path); //remap for translation
	path = ResourceLoader::import_remap(path); //remap for import
	if (!path.is_resource_file()) {
		return;
	}

	load(path);
}

void CompressedTexture2D::_validate_property(PropertyInfo &p_property) const {
}

Ref<Image> CompressedTexture2D::load_image_from_file(Ref<FileAccess> f, int p_size_limit) {
	uint32_t data_format = f->get_32();
	uint32_t w = f->get_16();
	uint32_t h = f->get_16();
	uint32_t mipmaps = f->get_32();
	Image::Format format = Image::Format(f->get_32());

	if (data_format == DATA_FORMAT_PNG || data_format == DATA_FORMAT_WEBP) {
		//look for a PNG or WebP file inside

		int sw = w;
		int sh = h;

		//mipmaps need to be read independently, they will be later combined
		Vector<Ref<Image>> mipmap_images;
		uint64_t total_size = 0;

		bool first = true;

		for (uint32_t i = 0; i < mipmaps + 1; i++) {
			uint32_t size = f->get_32();

			if (p_size_limit > 0 && i < (mipmaps - 1) && (sw > p_size_limit || sh > p_size_limit)) {
				//can't load this due to size limit
				sw = MAX(sw >> 1, 1);
				sh = MAX(sh >> 1, 1);
				f->seek(f->get_position() + size);
				continue;
			}

			Vector<uint8_t> pv;
			pv.resize(size);
			{
				uint8_t *wr = pv.ptrw();
				f->get_buffer(wr, size);
			}

			Ref<Image> img;
			if (data_format == DATA_FORMAT_PNG && Image::png_unpacker) {
				img = Image::png_unpacker(pv);
			} else if (data_format == DATA_FORMAT_WEBP && Image::webp_unpacker) {
				img = Image::webp_unpacker(pv);
			}

			if (img.is_null() || img->is_empty()) {
				ERR_FAIL_COND_V(img.is_null() || img->is_empty(), Ref<Image>());
			}

			if (first) {
				//format will actually be the format of the first image,
				//as it may have changed on compression
				format = img->get_format();
				first = false;
			} else if (img->get_format() != format) {
				img->convert(format); //all needs to be the same format
			}

			total_size += img->get_data().size();

			mipmap_images.push_back(img);

			sw = MAX(sw >> 1, 1);
			sh = MAX(sh >> 1, 1);
		}

		//print_line("mipmap read total: " + itos(mipmap_images.size()));

		Ref<Image> image;
		image.instantiate();

		if (mipmap_images.size() == 1) {
			//only one image (which will most likely be the case anyway for this format)
			image = mipmap_images[0];
			return image;

		} else {
			//rarer use case, but needs to be supported
			Vector<uint8_t> img_data;
			img_data.resize(total_size);

			{
				uint8_t *wr = img_data.ptrw();

				int ofs = 0;
				for (int i = 0; i < mipmap_images.size(); i++) {
					Vector<uint8_t> id = mipmap_images[i]->get_data();
					int len = id.size();
					const uint8_t *r = id.ptr();
					memcpy(&wr[ofs], r, len);
					ofs += len;
				}
			}

			image->set_data(w, h, true, mipmap_images[0]->get_format(), img_data);
			return image;
		}

	} else if (data_format == DATA_FORMAT_BASIS_UNIVERSAL) {
		int sw = w;
		int sh = h;
		uint32_t size = f->get_32();
		if (p_size_limit > 0 && (sw > p_size_limit || sh > p_size_limit)) {
			//can't load this due to size limit
			sw = MAX(sw >> 1, 1);<--- Variable 'sw' is assigned a value that is never used.
			sh = MAX(sh >> 1, 1);<--- Variable 'sh' is assigned a value that is never used.
			f->seek(f->get_position() + size);
			return Ref<Image>();
		}
		Vector<uint8_t> pv;
		pv.resize(size);
		{
			uint8_t *wr = pv.ptrw();
			f->get_buffer(wr, size);
		}
		Ref<Image> img;
		img = Image::basis_universal_unpacker(pv);
		if (img.is_null() || img->is_empty()) {
			ERR_FAIL_COND_V(img.is_null() || img->is_empty(), Ref<Image>());
		}
		format = img->get_format();
		sw = MAX(sw >> 1, 1);<--- Variable 'sw' is assigned a value that is never used.
		sh = MAX(sh >> 1, 1);<--- Variable 'sh' is assigned a value that is never used.
		return img;
	} else if (data_format == DATA_FORMAT_IMAGE) {
		int size = Image::get_image_data_size(w, h, format, mipmaps ? true : false);

		for (uint32_t i = 0; i < mipmaps + 1; i++) {
			int tw, th;
			int ofs = Image::get_image_mipmap_offset_and_dimensions(w, h, format, i, tw, th);

			if (p_size_limit > 0 && i < mipmaps && (p_size_limit > tw || p_size_limit > th)) {
				if (ofs) {
					f->seek(f->get_position() + ofs);
				}
				continue; //oops, size limit enforced, go to next
			}

			Vector<uint8_t> data;
			data.resize(size - ofs);

			{
				uint8_t *wr = data.ptrw();
				f->get_buffer(wr, data.size());
			}

			Ref<Image> image = Image::create_from_data(tw, th, mipmaps - i ? true : false, format, data);
<--- Clarify calculation precedence for '-' and '?'. [+]
Suspicious calculation. Please use parentheses to clarify the code. The code ''a-b?c:d'' should be written as either ''(a-b)?c:d'' or ''a-(b?c:d)''.

			return image;
		}
	}

	return Ref<Image>();
}

void CompressedTexture2D::_bind_methods() {
	ClassDB::bind_method(D_METHOD("load", "path"), &CompressedTexture2D::load);
	ClassDB::bind_method(D_METHOD("get_load_path"), &CompressedTexture2D::get_load_path);

	ADD_PROPERTY(PropertyInfo(Variant::STRING, "load_path", PROPERTY_HINT_FILE, "*.ctex"), "load", "get_load_path");
}

CompressedTexture2D::CompressedTexture2D() {}

CompressedTexture2D::~CompressedTexture2D() {
	if (texture.is_valid()) {
		ERR_FAIL_NULL(RenderingServer::get_singleton());
		RS::get_singleton()->free(texture);
	}
}

Ref<Resource> ResourceFormatLoaderCompressedTexture2D::load(const String &p_path, const String &p_original_path, Error *r_error, bool p_use_sub_threads, float *r_progress, CacheMode p_cache_mode) {
	Ref<CompressedTexture2D> st;
	st.instantiate();
	Error err = st->load(p_path);
	if (r_error) {
		*r_error = err;
	}
	if (err != OK) {
		return Ref<Resource>();
	}

	return st;
}

void ResourceFormatLoaderCompressedTexture2D::get_recognized_extensions(List<String> *p_extensions) const {
	p_extensions->push_back("ctex");
}

bool ResourceFormatLoaderCompressedTexture2D::handles_type(const String &p_type) const {
	return p_type == "CompressedTexture2D";
}

String ResourceFormatLoaderCompressedTexture2D::get_resource_type(const String &p_path) const {
	if (p_path.get_extension().to_lower() == "ctex") {
		return "CompressedTexture2D";
	}
	return "";
}

void CompressedTexture3D::set_path(const String &p_path, bool p_take_over) {
	if (texture.is_valid()) {
		RenderingServer::get_singleton()->texture_set_path(texture, p_path);
	}

	Resource::set_path(p_path, p_take_over);
}

Image::Format CompressedTexture3D::get_format() const {
	return format;
}

Error CompressedTexture3D::_load_data(const String &p_path, Vector<Ref<Image>> &r_data, Image::Format &r_format, int &r_width, int &r_height, int &r_depth, bool &r_mipmaps) {
	Ref<FileAccess> f = FileAccess::open(p_path, FileAccess::READ);
	ERR_FAIL_COND_V_MSG(f.is_null(), ERR_CANT_OPEN, vformat("Unable to open file: %s.", p_path));

	uint8_t header[4];
	f->get_buffer(header, 4);
	ERR_FAIL_COND_V(header[0] != 'G' || header[1] != 'S' || header[2] != 'T' || header[3] != 'L', ERR_FILE_UNRECOGNIZED);

	//stored as compressed textures (used for lossless and lossy compression)
	uint32_t version = f->get_32();

	if (version > FORMAT_VERSION) {
		ERR_FAIL_V_MSG(ERR_FILE_CORRUPT, "Compressed texture file is too new.");
	}

	r_depth = f->get_32(); //depth
	f->get_32(); //ignored (mode)
	f->get_32(); // ignored (data format)

	f->get_32(); //ignored
	int mipmap_count = f->get_32();
	f->get_32(); //ignored
	f->get_32(); //ignored

	r_mipmaps = mipmap_count != 0;

	r_data.clear();

	for (int i = 0; i < (r_depth + mipmap_count); i++) {
		Ref<Image> image = CompressedTexture2D::load_image_from_file(f, 0);
		ERR_FAIL_COND_V(image.is_null() || image->is_empty(), ERR_CANT_OPEN);
		if (i == 0) {
			r_format = image->get_format();
			r_width = image->get_width();
			r_height = image->get_height();
		}
		r_data.push_back(image);
	}

	return OK;
}

Error CompressedTexture3D::load(const String &p_path) {
	Vector<Ref<Image>> data;

	int tw, th, td;
	Image::Format tfmt;
	bool tmm;

	Error err = _load_data(p_path, data, tfmt, tw, th, td, tmm);
	if (err) {
		return err;
	}

	if (texture.is_valid()) {
		RID new_texture = RS::get_singleton()->texture_3d_create(tfmt, tw, th, td, tmm, data);
		RS::get_singleton()->texture_replace(texture, new_texture);
	} else {
		texture = RS::get_singleton()->texture_3d_create(tfmt, tw, th, td, tmm, data);
	}

	w = tw;
	h = th;
	d = td;
	mipmaps = tmm;
	format = tfmt;

	path_to_file = p_path;

	if (get_path().is_empty()) {
		//temporarily set path if no path set for resource, helps find errors
		RenderingServer::get_singleton()->texture_set_path(texture, p_path);
	}

	notify_property_list_changed();
	emit_changed();
	return OK;
}

String CompressedTexture3D::get_load_path() const {
	return path_to_file;
}

int CompressedTexture3D::get_width() const {
	return w;
}

int CompressedTexture3D::get_height() const {
	return h;
}

int CompressedTexture3D::get_depth() const {
	return d;
}

bool CompressedTexture3D::has_mipmaps() const {
	return mipmaps;
}

RID CompressedTexture3D::get_rid() const {
	if (!texture.is_valid()) {
		texture = RS::get_singleton()->texture_3d_placeholder_create();
	}
	return texture;
}

Vector<Ref<Image>> CompressedTexture3D::get_data() const {
	if (texture.is_valid()) {
		return RS::get_singleton()->texture_3d_get(texture);
	} else {
		return Vector<Ref<Image>>();
	}
}

void CompressedTexture3D::reload_from_file() {
	String path = get_path();
	if (!path.is_resource_file()) {
		return;
	}

	path = ResourceLoader::path_remap(path); //remap for translation
	path = ResourceLoader::import_remap(path); //remap for import
	if (!path.is_resource_file()) {
		return;
	}

	load(path);
}

void CompressedTexture3D::_validate_property(PropertyInfo &p_property) const {
}

void CompressedTexture3D::_bind_methods() {
	ClassDB::bind_method(D_METHOD("load", "path"), &CompressedTexture3D::load);
	ClassDB::bind_method(D_METHOD("get_load_path"), &CompressedTexture3D::get_load_path);

	ADD_PROPERTY(PropertyInfo(Variant::STRING, "load_path", PROPERTY_HINT_FILE, "*.ctex"), "load", "get_load_path");
}

CompressedTexture3D::CompressedTexture3D() {}

CompressedTexture3D::~CompressedTexture3D() {
	if (texture.is_valid()) {
		ERR_FAIL_NULL(RenderingServer::get_singleton());
		RS::get_singleton()->free(texture);
	}
}

Ref<Resource> ResourceFormatLoaderCompressedTexture3D::load(const String &p_path, const String &p_original_path, Error *r_error, bool p_use_sub_threads, float *r_progress, CacheMode p_cache_mode) {
	Ref<CompressedTexture3D> st;
	st.instantiate();
	Error err = st->load(p_path);
	if (r_error) {
		*r_error = err;
	}
	if (err != OK) {
		return Ref<Resource>();
	}

	return st;
}

void ResourceFormatLoaderCompressedTexture3D::get_recognized_extensions(List<String> *p_extensions) const {
	p_extensions->push_back("ctex3d");
}

bool ResourceFormatLoaderCompressedTexture3D::handles_type(const String &p_type) const {
	return p_type == "CompressedTexture3D";
}

String ResourceFormatLoaderCompressedTexture3D::get_resource_type(const String &p_path) const {
	if (p_path.get_extension().to_lower() == "ctex3d") {
		return "CompressedTexture3D";
	}
	return "";
}

void CompressedTextureLayered::set_path(const String &p_path, bool p_take_over) {
	if (texture.is_valid()) {
		RenderingServer::get_singleton()->texture_set_path(texture, p_path);
	}

	Resource::set_path(p_path, p_take_over);
}

Image::Format CompressedTextureLayered::get_format() const {
	return format;
}

Error CompressedTextureLayered::_load_data(const String &p_path, Vector<Ref<Image>> &images, int &mipmap_limit, int p_size_limit) {
	ERR_FAIL_COND_V(images.size() != 0, ERR_INVALID_PARAMETER);

	Ref<FileAccess> f = FileAccess::open(p_path, FileAccess::READ);
	ERR_FAIL_COND_V_MSG(f.is_null(), ERR_CANT_OPEN, vformat("Unable to open file: %s.", p_path));

	uint8_t header[4];
	f->get_buffer(header, 4);
	if (header[0] != 'G' || header[1] != 'S' || header[2] != 'T' || header[3] != 'L') {
		ERR_FAIL_V_MSG(ERR_FILE_CORRUPT, "Compressed texture layered file is corrupt (Bad header).");
	}

	uint32_t version = f->get_32();

	if (version > FORMAT_VERSION) {
		ERR_FAIL_V_MSG(ERR_FILE_CORRUPT, "Compressed texture file is too new.");
	}

	uint32_t layer_count = f->get_32(); //layer count
	uint32_t type = f->get_32(); //layer count
	ERR_FAIL_COND_V((int)type != layered_type, ERR_INVALID_DATA);

	uint32_t df = f->get_32(); //data format
	mipmap_limit = int(f->get_32());
	//reserved
	f->get_32();
	f->get_32();
	f->get_32();

	if (!(df & FORMAT_BIT_STREAM)) {
		p_size_limit = 0;
	}

	images.resize(layer_count);

	for (uint32_t i = 0; i < layer_count; i++) {
		Ref<Image> image = CompressedTexture2D::load_image_from_file(f, p_size_limit);
		ERR_FAIL_COND_V(image.is_null() || image->is_empty(), ERR_CANT_OPEN);
		images.write[i] = image;
	}

	return OK;
}

Error CompressedTextureLayered::load(const String &p_path) {
	Vector<Ref<Image>> images;

	int mipmap_limit;

	Error err = _load_data(p_path, images, mipmap_limit);
	if (err) {
		return err;
	}

	if (texture.is_valid()) {
		RID new_texture = RS::get_singleton()->texture_2d_layered_create(images, RS::TextureLayeredType(layered_type));
		RS::get_singleton()->texture_replace(texture, new_texture);
	} else {
		texture = RS::get_singleton()->texture_2d_layered_create(images, RS::TextureLayeredType(layered_type));
	}

	w = images[0]->get_width();
	h = images[0]->get_height();
	mipmaps = images[0]->has_mipmaps();
	format = images[0]->get_format();
	layers = images.size();

	path_to_file = p_path;

	if (get_path().is_empty()) {
		//temporarily set path if no path set for resource, helps find errors
		RenderingServer::get_singleton()->texture_set_path(texture, p_path);
	}

	notify_property_list_changed();
	emit_changed();
	return OK;
}

String CompressedTextureLayered::get_load_path() const {
	return path_to_file;
}

int CompressedTextureLayered::get_width() const {
	return w;
}

int CompressedTextureLayered::get_height() const {
	return h;
}

int CompressedTextureLayered::get_layers() const {
	return layers;
}

bool CompressedTextureLayered::has_mipmaps() const {
	return mipmaps;
}

TextureLayered::LayeredType CompressedTextureLayered::get_layered_type() const {
	return layered_type;
}

RID CompressedTextureLayered::get_rid() const {
	if (!texture.is_valid()) {
		texture = RS::get_singleton()->texture_2d_layered_placeholder_create(RS::TextureLayeredType(layered_type));
	}
	return texture;
}

Ref<Image> CompressedTextureLayered::get_layer_data(int p_layer) const {
	if (texture.is_valid()) {
		ERR_FAIL_INDEX_V(p_layer, get_layers(), Ref<Image>());
		return RS::get_singleton()->texture_2d_layer_get(texture, p_layer);
	} else {
		return Ref<Image>();
	}
}

void CompressedTextureLayered::reload_from_file() {
	String path = get_path();
	if (!path.is_resource_file()) {
		return;
	}

	path = ResourceLoader::path_remap(path); //remap for translation
	path = ResourceLoader::import_remap(path); //remap for import
	if (!path.is_resource_file()) {
		return;
	}

	load(path);
}

void CompressedTextureLayered::_validate_property(PropertyInfo &p_property) const {
}

void CompressedTextureLayered::_bind_methods() {
	ClassDB::bind_method(D_METHOD("load", "path"), &CompressedTextureLayered::load);
	ClassDB::bind_method(D_METHOD("get_load_path"), &CompressedTextureLayered::get_load_path);

	ADD_PROPERTY(PropertyInfo(Variant::STRING, "load_path", PROPERTY_HINT_FILE, "*.ctex"), "load", "get_load_path");
}

CompressedTextureLayered::CompressedTextureLayered(LayeredType p_type) {
	layered_type = p_type;
<--- Variable 'layered_type' is assigned in constructor body. Consider performing initialization in initialization list. [+]
When an object of a class is created, the constructors of all member variables are called consecutively in the order the variables are declared, even if you don't explicitly write them to the initialization list. You could avoid assigning 'layered_type' a value by passing the value to the constructor in the initialization list.
}

CompressedTextureLayered::~CompressedTextureLayered() {
	if (texture.is_valid()) {
		ERR_FAIL_NULL(RenderingServer::get_singleton());
		RS::get_singleton()->free(texture);
	}
}

/////////////////////////////////////////////////

Ref<Resource> ResourceFormatLoaderCompressedTextureLayered::load(const String &p_path, const String &p_original_path, Error *r_error, bool p_use_sub_threads, float *r_progress, CacheMode p_cache_mode) {
	Ref<CompressedTextureLayered> ct;
	if (p_path.get_extension().to_lower() == "ctexarray") {
		Ref<CompressedTexture2DArray> c;
		c.instantiate();
		ct = c;
	} else if (p_path.get_extension().to_lower() == "ccube") {
		Ref<CompressedCubemap> c;
		c.instantiate();
		ct = c;
	} else if (p_path.get_extension().to_lower() == "ccubearray") {
		Ref<CompressedCubemapArray> c;
		c.instantiate();
		ct = c;
	} else {
		if (r_error) {
			*r_error = ERR_FILE_UNRECOGNIZED;
		}
		return Ref<Resource>();
	}
	Error err = ct->load(p_path);
	if (r_error) {
		*r_error = err;
	}
	if (err != OK) {
		return Ref<Resource>();
	}

	return ct;
}

void ResourceFormatLoaderCompressedTextureLayered::get_recognized_extensions(List<String> *p_extensions) const {
	p_extensions->push_back("ctexarray");
	p_extensions->push_back("ccube");
	p_extensions->push_back("ccubearray");
}

bool ResourceFormatLoaderCompressedTextureLayered::handles_type(const String &p_type) const {
	return p_type == "CompressedTexture2DArray" || p_type == "CompressedCubemap" || p_type == "CompressedCubemapArray";
}

String ResourceFormatLoaderCompressedTextureLayered::get_resource_type(const String &p_path) const {
	if (p_path.get_extension().to_lower() == "ctexarray") {
		return "CompressedTexture2DArray";
	}
	if (p_path.get_extension().to_lower() == "ccube") {
		return "CompressedCubemap";
	}
	if (p_path.get_extension().to_lower() == "ccubearray") {
		return "CompressedCubemapArray";
	}
	return "";
}