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/*************************************************************************/
/* resource_saver_png.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
/* */
/* 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 "globals.h"
#include "os/file_access.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);
Image img = texture->get_data();
Error err = save_image(p_path, img);
if (err == OK) {
bool global_filter = Globals::get_singleton()->get("image_loader/filter");
bool global_mipmaps = Globals::get_singleton()->get("image_loader/gen_mipmaps");
bool global_repeat = Globals::get_singleton()->get("image_loader/repeat");
String text;
if (global_filter!=bool(texture->get_flags()&Texture::FLAG_FILTER)) {
text+=bool(texture->get_flags()&Texture::FLAG_FILTER)?"filter=true\n":"filter=false\n";
}
if (global_mipmaps!=bool(texture->get_flags()&Texture::FLAG_MIPMAPS)) {
text+=bool(texture->get_flags()&Texture::FLAG_MIPMAPS)?"gen_mipmaps=true\n":"gen_mipmaps=false\n";
}
if (global_repeat!=bool(texture->get_flags()&Texture::FLAG_REPEAT)) {
text+=bool(texture->get_flags()&Texture::FLAG_REPEAT)?"repeat=true\n":"repeat=false\n";
}
if (bool(texture->get_flags()&Texture::FLAG_ANISOTROPIC_FILTER)) {
text+="anisotropic=true\n";
}
if (bool(texture->get_flags()&Texture::FLAG_CONVERT_TO_LINEAR)) {
text+="tolinear=true\n";
}
if (bool(texture->get_flags()&Texture::FLAG_MIRRORED_REPEAT)) {
text+="mirroredrepeat=true\n";
}
if (text!="" || FileAccess::exists(p_path+".flags")) {
FileAccess* f = FileAccess::open(p_path+".flags",FileAccess::WRITE);
if (f) {
f->store_string(text);
memdelete(f);
}
}
}
return err;
};
Error ResourceSaverPNG::save_image(const String &p_path, Image &p_img) {
if (p_img.get_format() > Image::FORMAT_INDEXED_ALPHA)
p_img.decompress();
ERR_FAIL_COND_V(p_img.get_format() > Image::FORMAT_INDEXED_ALPHA, 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(p_img.get_format()) {
case Image::FORMAT_GRAYSCALE: {
pngf=PNG_COLOR_TYPE_GRAY;
cs=1;
} break;
case Image::FORMAT_GRAYSCALE_ALPHA: {
pngf=PNG_COLOR_TYPE_GRAY_ALPHA;
cs=2;
} break;
case Image::FORMAT_RGB: {
pngf=PNG_COLOR_TYPE_RGB;
cs=3;
} break;
case Image::FORMAT_RGBA: {
pngf=PNG_COLOR_TYPE_RGB_ALPHA;
cs=4;
} break;
default: {
if (p_img.detect_alpha()) {
p_img.convert(Image::FORMAT_RGBA);
pngf=PNG_COLOR_TYPE_RGB_ALPHA;
cs=4;
} else {
p_img.convert(Image::FORMAT_RGB);
pngf=PNG_COLOR_TYPE_RGB;
cs=3;
}
}
}
int w = p_img.get_width();
int h = p_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);
}
DVector<uint8_t>::Read r = p_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_type("ImageTexture"));
}
void ResourceSaverPNG::get_recognized_extensions(const RES& p_resource,List<String> *p_extensions) const{
if (p_resource->cast_to<Texture>()) {
p_extensions->push_back("png");
}
}
ResourceSaverPNG::ResourceSaverPNG() {
Image::save_png_func = &save_image;
};
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