115 lines
4.3 KiB
C++
115 lines
4.3 KiB
C++
/*************************************************************************/
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/* texture_loader_pkm.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "texture_loader_pkm.h"
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#include "core/os/file_access.h"
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#include <string.h>
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struct ETC1Header {
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char tag[6]; // "PKM 10"
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uint16_t format = 0; // Format == number of mips (== zero)
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uint16_t texWidth = 0; // Texture dimensions, multiple of 4 (big-endian)
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uint16_t texHeight = 0;
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uint16_t origWidth = 0; // Original dimensions (big-endian)
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uint16_t origHeight = 0;
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};
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RES ResourceFormatPKM::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) {
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if (r_error) {
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*r_error = ERR_CANT_OPEN;
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}
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Error err;
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FileAccess *f = FileAccess::open(p_path, FileAccess::READ, &err);
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if (!f) {
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return RES();
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}
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FileAccessRef fref(f);
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if (r_error) {
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*r_error = ERR_FILE_CORRUPT;
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}
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ERR_FAIL_COND_V_MSG(err != OK, RES(), "Unable to open PKM texture file '" + p_path + "'.");
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// big endian
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f->set_endian_swap(true);
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ETC1Header h;
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f->get_buffer((uint8_t *)&h.tag, sizeof(h.tag));
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ERR_FAIL_COND_V_MSG(strncmp(h.tag, "PKM 10", sizeof(h.tag)), RES(), "Invalid or unsupported PKM texture file '" + p_path + "'.");
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h.format = f->get_16();
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h.texWidth = f->get_16();
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h.texHeight = f->get_16();
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h.origWidth = f->get_16();
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h.origHeight = f->get_16();
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Vector<uint8_t> src_data;
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uint32_t size = h.texWidth * h.texHeight / 2;
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src_data.resize(size);
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uint8_t *wb = src_data.ptrw();
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f->get_buffer(wb, size);
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int mipmaps = h.format;
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int width = h.origWidth;
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int height = h.origHeight;
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Ref<Image> img = memnew(Image(width, height, mipmaps, Image::FORMAT_ETC, src_data));
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Ref<ImageTexture> texture = memnew(ImageTexture);
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texture->create_from_image(img);
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if (r_error) {
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*r_error = OK;
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}
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f->close();
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memdelete(f);
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return texture;
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}
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void ResourceFormatPKM::get_recognized_extensions(List<String> *p_extensions) const {
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p_extensions->push_back("pkm");
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}
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bool ResourceFormatPKM::handles_type(const String &p_type) const {
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return ClassDB::is_parent_class(p_type, "Texture2D");
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}
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String ResourceFormatPKM::get_resource_type(const String &p_path) const {
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if (p_path.get_extension().to_lower() == "pkm") {
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return "ImageTexture";
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}
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return "";
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}
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