/*************************************************************************/ /* resource_saver_png.cpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2018 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 "resource_saver_png.h" #include "core/image.h" #include "core/os/file_access.h" #include "core/project_settings.h" #include "scene/resources/texture.h" #include <png.h> static void _write_png_data(png_structp png_ptr, png_bytep data, png_size_t p_length) { FileAccess *f = (FileAccess *)png_get_io_ptr(png_ptr); f->store_buffer((const uint8_t *)data, p_length); } Error ResourceSaverPNG::save(const String &p_path, const RES &p_resource, uint32_t p_flags) { Ref<ImageTexture> texture = p_resource; ERR_FAIL_COND_V(!texture.is_valid(), ERR_INVALID_PARAMETER); ERR_EXPLAIN("Can't save empty texture as PNG"); ERR_FAIL_COND_V(!texture->get_width() || !texture->get_height(), ERR_INVALID_PARAMETER); Ref<Image> img = texture->get_data(); Error err = save_image(p_path, img); if (err == OK) { } return err; }; Error ResourceSaverPNG::save_image(const String &p_path, const Ref<Image> &p_img) { Ref<Image> img = p_img->duplicate(); if (img->is_compressed()) img->decompress(); ERR_FAIL_COND_V(img->is_compressed(), ERR_INVALID_PARAMETER); png_structp png_ptr; png_infop info_ptr; png_bytep *row_pointers; /* initialize stuff */ png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); ERR_FAIL_COND_V(!png_ptr, ERR_CANT_CREATE); info_ptr = png_create_info_struct(png_ptr); ERR_FAIL_COND_V(!info_ptr, ERR_CANT_CREATE); if (setjmp(png_jmpbuf(png_ptr))) { ERR_FAIL_V(ERR_CANT_OPEN); } //change this Error err; FileAccess *f = FileAccess::open(p_path, FileAccess::WRITE, &err); if (err) { ERR_FAIL_V(err); } png_set_write_fn(png_ptr, f, _write_png_data, NULL); /* write header */ if (setjmp(png_jmpbuf(png_ptr))) { ERR_FAIL_V(ERR_CANT_OPEN); } int pngf = 0; int cs = 0; switch (img->get_format()) { case Image::FORMAT_L8: { pngf = PNG_COLOR_TYPE_GRAY; cs = 1; } break; case Image::FORMAT_LA8: { pngf = PNG_COLOR_TYPE_GRAY_ALPHA; cs = 2; } break; case Image::FORMAT_RGB8: { pngf = PNG_COLOR_TYPE_RGB; cs = 3; } break; case Image::FORMAT_RGBA8: { pngf = PNG_COLOR_TYPE_RGB_ALPHA; cs = 4; } break; default: { if (img->detect_alpha()) { img->convert(Image::FORMAT_RGBA8); pngf = PNG_COLOR_TYPE_RGB_ALPHA; cs = 4; } else { img->convert(Image::FORMAT_RGB8); pngf = PNG_COLOR_TYPE_RGB; cs = 3; } } } int w = img->get_width(); int h = img->get_height(); png_set_IHDR(png_ptr, info_ptr, w, h, 8, pngf, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); png_write_info(png_ptr, info_ptr); /* write bytes */ if (setjmp(png_jmpbuf(png_ptr))) { memdelete(f); ERR_FAIL_V(ERR_CANT_OPEN); } PoolVector<uint8_t>::Read r = img->get_data().read(); row_pointers = (png_bytep *)memalloc(sizeof(png_bytep) * h); for (int i = 0; i < h; i++) { row_pointers[i] = (png_bytep)&r[i * w * cs]; } png_write_image(png_ptr, row_pointers); memfree(row_pointers); /* end write */ if (setjmp(png_jmpbuf(png_ptr))) { memdelete(f); ERR_FAIL_V(ERR_CANT_OPEN); } png_write_end(png_ptr, NULL); memdelete(f); /* cleanup heap allocation */ png_destroy_write_struct(&png_ptr, &info_ptr); return OK; } bool ResourceSaverPNG::recognize(const RES &p_resource) const { return (p_resource.is_valid() && p_resource->is_class("ImageTexture")); } void ResourceSaverPNG::get_recognized_extensions(const RES &p_resource, List<String> *p_extensions) const { if (Object::cast_to<Texture>(*p_resource)) { p_extensions->push_back("png"); } } ResourceSaverPNG::ResourceSaverPNG() { Image::save_png_func = &save_image; };