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b16c309f82
Happy new year to the wonderful Godot community!
200 lines
5.7 KiB
C++
200 lines
5.7 KiB
C++
/*************************************************************************/
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/* resource_saver_png.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) 2007-2019 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2019 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 "resource_saver_png.h"
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#include "core/image.h"
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#include "core/os/file_access.h"
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#include "core/project_settings.h"
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#include "scene/resources/texture.h"
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#include <png.h>
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static void _write_png_data(png_structp png_ptr, png_bytep data, png_size_t p_length) {
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FileAccess *f = (FileAccess *)png_get_io_ptr(png_ptr);
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f->store_buffer((const uint8_t *)data, p_length);
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}
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Error ResourceSaverPNG::save(const String &p_path, const RES &p_resource, uint32_t p_flags) {
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Ref<ImageTexture> texture = p_resource;
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ERR_FAIL_COND_V(!texture.is_valid(), ERR_INVALID_PARAMETER);
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ERR_EXPLAIN("Can't save empty texture as PNG");
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ERR_FAIL_COND_V(!texture->get_width() || !texture->get_height(), ERR_INVALID_PARAMETER);
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Ref<Image> img = texture->get_data();
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Error err = save_image(p_path, img);
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if (err == OK) {
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}
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return err;
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};
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Error ResourceSaverPNG::save_image(const String &p_path, const Ref<Image> &p_img) {
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Ref<Image> img = p_img->duplicate();
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if (img->is_compressed())
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img->decompress();
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ERR_FAIL_COND_V(img->is_compressed(), ERR_INVALID_PARAMETER);
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png_structp png_ptr;
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png_infop info_ptr;
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png_bytep *row_pointers;
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/* initialize stuff */
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png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
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ERR_FAIL_COND_V(!png_ptr, ERR_CANT_CREATE);
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info_ptr = png_create_info_struct(png_ptr);
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ERR_FAIL_COND_V(!info_ptr, ERR_CANT_CREATE);
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if (setjmp(png_jmpbuf(png_ptr))) {
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ERR_FAIL_V(ERR_CANT_OPEN);
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}
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//change this
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Error err;
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FileAccess *f = FileAccess::open(p_path, FileAccess::WRITE, &err);
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if (err) {
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ERR_FAIL_V(err);
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}
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png_set_write_fn(png_ptr, f, _write_png_data, NULL);
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/* write header */
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if (setjmp(png_jmpbuf(png_ptr))) {
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ERR_FAIL_V(ERR_CANT_OPEN);
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}
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int pngf = 0;
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int cs = 0;
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switch (img->get_format()) {
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case Image::FORMAT_L8: {
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pngf = PNG_COLOR_TYPE_GRAY;
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cs = 1;
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} break;
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case Image::FORMAT_LA8: {
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pngf = PNG_COLOR_TYPE_GRAY_ALPHA;
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cs = 2;
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} break;
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case Image::FORMAT_RGB8: {
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pngf = PNG_COLOR_TYPE_RGB;
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cs = 3;
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} break;
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case Image::FORMAT_RGBA8: {
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pngf = PNG_COLOR_TYPE_RGB_ALPHA;
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cs = 4;
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} break;
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default: {
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if (img->detect_alpha()) {
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img->convert(Image::FORMAT_RGBA8);
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pngf = PNG_COLOR_TYPE_RGB_ALPHA;
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cs = 4;
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} else {
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img->convert(Image::FORMAT_RGB8);
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pngf = PNG_COLOR_TYPE_RGB;
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cs = 3;
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}
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}
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}
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int w = img->get_width();
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int h = img->get_height();
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png_set_IHDR(png_ptr, info_ptr, w, h,
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8, pngf, PNG_INTERLACE_NONE,
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PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
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png_write_info(png_ptr, info_ptr);
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/* write bytes */
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if (setjmp(png_jmpbuf(png_ptr))) {
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memdelete(f);
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ERR_FAIL_V(ERR_CANT_OPEN);
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}
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PoolVector<uint8_t>::Read r = img->get_data().read();
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row_pointers = (png_bytep *)memalloc(sizeof(png_bytep) * h);
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for (int i = 0; i < h; i++) {
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row_pointers[i] = (png_bytep)&r[i * w * cs];
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}
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png_write_image(png_ptr, row_pointers);
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memfree(row_pointers);
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/* end write */
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if (setjmp(png_jmpbuf(png_ptr))) {
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memdelete(f);
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ERR_FAIL_V(ERR_CANT_OPEN);
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}
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png_write_end(png_ptr, NULL);
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memdelete(f);
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/* cleanup heap allocation */
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png_destroy_write_struct(&png_ptr, &info_ptr);
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return OK;
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}
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bool ResourceSaverPNG::recognize(const RES &p_resource) const {
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return (p_resource.is_valid() && p_resource->is_class("ImageTexture"));
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}
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void ResourceSaverPNG::get_recognized_extensions(const RES &p_resource, List<String> *p_extensions) const {
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if (Object::cast_to<Texture>(*p_resource)) {
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p_extensions->push_back("png");
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}
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}
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ResourceSaverPNG::ResourceSaverPNG() {
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Image::save_png_func = &save_image;
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};
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