/*************************************************************************/ /* image_loader_jpegd.cpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ #include "image_loader_jpegd.h" #include "core/os/os.h" #include "core/string/print_string.h" #include "thirdparty/jpeg-compressor/jpgd.h" #include "thirdparty/jpeg-compressor/jpge.h" #include <string.h> Error jpeg_load_image_from_buffer(Image *p_image, const uint8_t *p_buffer, int p_buffer_len) { jpgd::jpeg_decoder_mem_stream mem_stream(p_buffer, p_buffer_len); jpgd::jpeg_decoder decoder(&mem_stream); if (decoder.get_error_code() != jpgd::JPGD_SUCCESS) { return ERR_CANT_OPEN; } const int image_width = decoder.get_width(); const int image_height = decoder.get_height(); const int comps = decoder.get_num_components(); if (comps != 1 && comps != 3) { return ERR_FILE_CORRUPT; } if (decoder.begin_decoding() != jpgd::JPGD_SUCCESS) { return ERR_FILE_CORRUPT; } const int dst_bpl = image_width * comps; Vector<uint8_t> data; data.resize(dst_bpl * image_height); uint8_t *dw = data.ptrw(); jpgd::uint8 *pImage_data = (jpgd::uint8 *)dw; for (int y = 0; y < image_height; y++) { const jpgd::uint8 *pScan_line; jpgd::uint scan_line_len; if (decoder.decode((const void **)&pScan_line, &scan_line_len) != jpgd::JPGD_SUCCESS) { return ERR_FILE_CORRUPT; } jpgd::uint8 *pDst = pImage_data + y * dst_bpl; if (comps == 1) { memcpy(pDst, pScan_line, dst_bpl); } else { // For images with more than 1 channel pScan_line will always point to a buffer // containing 32-bit RGBA pixels. Alpha is always 255 and we ignore it. for (int x = 0; x < image_width; x++) { pDst[0] = pScan_line[x * 4 + 0]; pDst[1] = pScan_line[x * 4 + 1]; pDst[2] = pScan_line[x * 4 + 2]; pDst += 3; } } } //all good Image::Format fmt; if (comps == 1) { fmt = Image::FORMAT_L8; } else { fmt = Image::FORMAT_RGB8; } p_image->create(image_width, image_height, false, fmt, data); return OK; } Error ImageLoaderJPG::load_image(Ref<Image> p_image, Ref<FileAccess> f, BitField<ImageFormatLoader::LoaderFlags> p_flags, float p_scale) { Vector<uint8_t> src_image; uint64_t src_image_len = f->get_length(); ERR_FAIL_COND_V(src_image_len == 0, ERR_FILE_CORRUPT); src_image.resize(src_image_len); uint8_t *w = src_image.ptrw(); f->get_buffer(&w[0], src_image_len); Error err = jpeg_load_image_from_buffer(p_image.ptr(), w, src_image_len); return err; } void ImageLoaderJPG::get_recognized_extensions(List<String> *p_extensions) const { p_extensions->push_back("jpg"); p_extensions->push_back("jpeg"); } static Ref<Image> _jpegd_mem_loader_func(const uint8_t *p_png, int p_size) { Ref<Image> img; img.instantiate(); Error err = jpeg_load_image_from_buffer(img.ptr(), p_png, p_size); ERR_FAIL_COND_V(err, Ref<Image>()); return img; } static Error _jpgd_save_func(const String &p_path, const Ref<Image> &p_img, float p_quality) { return OK; } class ImageLoaderJPGOSFile : public jpge::output_stream { public: Ref<FileAccess> f; virtual bool put_buf(const void *Pbuf, int len) { f->store_buffer((const uint8_t *)Pbuf, len); return true; } }; class ImageLoaderJPGOSBuffer : public jpge::output_stream { public: Vector<uint8_t> *buffer = nullptr; virtual bool put_buf(const void *Pbuf, int len) { uint32_t base = buffer->size(); buffer->resize(base + len); memcpy(buffer->ptrw() + base, Pbuf, len); return true; } }; static Vector<uint8_t> _jpgd_buffer_save_func(const Ref<Image> &p_img, float p_quality) { ERR_FAIL_COND_V(p_img.is_null() || p_img->is_empty(), Vector<uint8_t>()); Ref<Image> image = p_img; if (image->get_format() != Image::FORMAT_RGB8) { image->convert(Image::FORMAT_ETC2_RGB8); } jpge::params p; p.m_quality = CLAMP(p_quality * 100, 1, 100); Vector<uint8_t> output; ImageLoaderJPGOSBuffer ob; ob.buffer = &output; jpge::jpeg_encoder enc; enc.init(&ob, image->get_width(), image->get_height(), 3, p); const uint8_t *src_data = image->get_data().ptr(); for (int i = 0; i < image->get_height(); i++) { enc.process_scanline(&src_data[i * image->get_width() * 3]); } enc.process_scanline(nullptr); return output; } ImageLoaderJPG::ImageLoaderJPG() { Image::_jpg_mem_loader_func = _jpegd_mem_loader_func; Image::save_jpg_func = _jpgd_save_func; Image::save_jpg_buffer_func = _jpgd_buffer_save_func; }