139 lines
4.8 KiB
C++
139 lines
4.8 KiB
C++
/*************************************************************************/
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/* image_loader_jpegd.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 "image_loader_jpegd.h"
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#include "core/os/os.h"
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#include "core/string/print_string.h"
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#include <jpgd.h>
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#include <string.h>
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Error jpeg_load_image_from_buffer(Image *p_image, const uint8_t *p_buffer, int p_buffer_len) {
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jpgd::jpeg_decoder_mem_stream mem_stream(p_buffer, p_buffer_len);
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jpgd::jpeg_decoder decoder(&mem_stream);
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if (decoder.get_error_code() != jpgd::JPGD_SUCCESS) {
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return ERR_CANT_OPEN;
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}
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const int image_width = decoder.get_width();
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const int image_height = decoder.get_height();
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const int comps = decoder.get_num_components();
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if (comps != 1 && comps != 3) {
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return ERR_FILE_CORRUPT;
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}
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if (decoder.begin_decoding() != jpgd::JPGD_SUCCESS) {
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return ERR_FILE_CORRUPT;
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}
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const int dst_bpl = image_width * comps;
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Vector<uint8_t> data;
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data.resize(dst_bpl * image_height);
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uint8_t *dw = data.ptrw();
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jpgd::uint8 *pImage_data = (jpgd::uint8 *)dw;
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for (int y = 0; y < image_height; y++) {
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const jpgd::uint8 *pScan_line;
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jpgd::uint scan_line_len;
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if (decoder.decode((const void **)&pScan_line, &scan_line_len) != jpgd::JPGD_SUCCESS) {
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return ERR_FILE_CORRUPT;
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}
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jpgd::uint8 *pDst = pImage_data + y * dst_bpl;
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if (comps == 1) {
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memcpy(pDst, pScan_line, dst_bpl);
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} else {
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// For images with more than 1 channel pScan_line will always point to a buffer
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// containing 32-bit RGBA pixels. Alpha is always 255 and we ignore it.
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for (int x = 0; x < image_width; x++) {
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pDst[0] = pScan_line[x * 4 + 0];
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pDst[1] = pScan_line[x * 4 + 1];
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pDst[2] = pScan_line[x * 4 + 2];
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pDst += 3;
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}
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}
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}
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//all good
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Image::Format fmt;
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if (comps == 1) {
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fmt = Image::FORMAT_L8;
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} else {
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fmt = Image::FORMAT_RGB8;
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}
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p_image->create(image_width, image_height, false, fmt, data);
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return OK;
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}
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Error ImageLoaderJPG::load_image(Ref<Image> p_image, FileAccess *f, bool p_force_linear, float p_scale) {
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Vector<uint8_t> src_image;
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uint64_t src_image_len = f->get_length();
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ERR_FAIL_COND_V(src_image_len == 0, ERR_FILE_CORRUPT);
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src_image.resize(src_image_len);
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uint8_t *w = src_image.ptrw();
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f->get_buffer(&w[0], src_image_len);
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f->close();
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Error err = jpeg_load_image_from_buffer(p_image.ptr(), w, src_image_len);
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return err;
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}
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void ImageLoaderJPG::get_recognized_extensions(List<String> *p_extensions) const {
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p_extensions->push_back("jpg");
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p_extensions->push_back("jpeg");
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}
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static Ref<Image> _jpegd_mem_loader_func(const uint8_t *p_png, int p_size) {
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Ref<Image> img;
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img.instance();
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Error err = jpeg_load_image_from_buffer(img.ptr(), p_png, p_size);
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ERR_FAIL_COND_V(err, Ref<Image>());
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return img;
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}
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ImageLoaderJPG::ImageLoaderJPG() {
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Image::_jpg_mem_loader_func = _jpegd_mem_loader_func;
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}
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