/*************************************************************************/ /* image_loader_webp.cpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2021 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_webp.h" #include "core/io/marshalls.h" #include "core/os/os.h" #include "core/string/print_string.h" #include <stdlib.h> #include <webp/decode.h> #include <webp/encode.h> static Vector<uint8_t> _webp_lossy_pack(const Ref<Image> &p_image, float p_quality) { ERR_FAIL_COND_V(p_image.is_null() || p_image->is_empty(), Vector<uint8_t>()); Ref<Image> img = p_image->duplicate(); if (img->detect_alpha()) { img->convert(Image::FORMAT_RGBA8); } else { img->convert(Image::FORMAT_RGB8); } Size2 s(img->get_width(), img->get_height()); Vector<uint8_t> data = img->get_data(); const uint8_t *r = data.ptr(); uint8_t *dst_buff = nullptr; size_t dst_size = 0; if (img->get_format() == Image::FORMAT_RGB8) { dst_size = WebPEncodeRGB(r, s.width, s.height, 3 * s.width, CLAMP(p_quality * 100.0, 0, 100.0), &dst_buff); } else { dst_size = WebPEncodeRGBA(r, s.width, s.height, 4 * s.width, CLAMP(p_quality * 100.0, 0, 100.0), &dst_buff); } ERR_FAIL_COND_V(dst_size == 0, Vector<uint8_t>()); Vector<uint8_t> dst; dst.resize(4 + dst_size); uint8_t *w = dst.ptrw(); w[0] = 'W'; w[1] = 'E'; w[2] = 'B'; w[3] = 'P'; memcpy(&w[4], dst_buff, dst_size); free(dst_buff); return dst; } static Ref<Image> _webp_lossy_unpack(const Vector<uint8_t> &p_buffer) { int size = p_buffer.size() - 4; ERR_FAIL_COND_V(size <= 0, Ref<Image>()); const uint8_t *r = p_buffer.ptr(); ERR_FAIL_COND_V(r[0] != 'W' || r[1] != 'E' || r[2] != 'B' || r[3] != 'P', Ref<Image>()); WebPBitstreamFeatures features; if (WebPGetFeatures(&r[4], size, &features) != VP8_STATUS_OK) { ERR_FAIL_V_MSG(Ref<Image>(), "Error unpacking WEBP image."); } /* print_line("width: "+itos(features.width)); print_line("height: "+itos(features.height)); print_line("alpha: "+itos(features.has_alpha)); */ Vector<uint8_t> dst_image; int datasize = features.width * features.height * (features.has_alpha ? 4 : 3); dst_image.resize(datasize); uint8_t *dst_w = dst_image.ptrw(); bool errdec = false; if (features.has_alpha) { errdec = WebPDecodeRGBAInto(&r[4], size, dst_w, datasize, 4 * features.width) == nullptr; } else { errdec = WebPDecodeRGBInto(&r[4], size, dst_w, datasize, 3 * features.width) == nullptr; } ERR_FAIL_COND_V_MSG(errdec, Ref<Image>(), "Failed decoding WebP image."); Ref<Image> img = memnew(Image(features.width, features.height, 0, features.has_alpha ? Image::FORMAT_RGBA8 : Image::FORMAT_RGB8, dst_image)); return img; } Error webp_load_image_from_buffer(Image *p_image, const uint8_t *p_buffer, int p_buffer_len) { ERR_FAIL_NULL_V(p_image, ERR_INVALID_PARAMETER); WebPBitstreamFeatures features; if (WebPGetFeatures(p_buffer, p_buffer_len, &features) != VP8_STATUS_OK) { ERR_FAIL_V(ERR_FILE_CORRUPT); } Vector<uint8_t> dst_image; int datasize = features.width * features.height * (features.has_alpha ? 4 : 3); dst_image.resize(datasize); uint8_t *dst_w = dst_image.ptrw(); bool errdec = false; if (features.has_alpha) { errdec = WebPDecodeRGBAInto(p_buffer, p_buffer_len, dst_w, datasize, 4 * features.width) == nullptr; } else { errdec = WebPDecodeRGBInto(p_buffer, p_buffer_len, dst_w, datasize, 3 * features.width) == nullptr; } ERR_FAIL_COND_V_MSG(errdec, ERR_FILE_CORRUPT, "Failed decoding WebP image."); p_image->create(features.width, features.height, false, features.has_alpha ? Image::FORMAT_RGBA8 : Image::FORMAT_RGB8, dst_image); return OK; } static Ref<Image> _webp_mem_loader_func(const uint8_t *p_png, int p_size) { Ref<Image> img; img.instance(); Error err = webp_load_image_from_buffer(img.ptr(), p_png, p_size); ERR_FAIL_COND_V(err, Ref<Image>()); return img; } Error ImageLoaderWEBP::load_image(Ref<Image> p_image, FileAccess *f, bool p_force_linear, float p_scale) { Vector<uint8_t> src_image; int src_image_len = f->get_len(); 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); f->close(); Error err = webp_load_image_from_buffer(p_image.ptr(), w, src_image_len); return err; } void ImageLoaderWEBP::get_recognized_extensions(List<String> *p_extensions) const { p_extensions->push_back("webp"); } ImageLoaderWEBP::ImageLoaderWEBP() { Image::_webp_mem_loader_func = _webp_mem_loader_func; Image::lossy_packer = _webp_lossy_pack; Image::lossy_unpacker = _webp_lossy_unpack; }