diff options
Diffstat (limited to 'drivers/png/resource_saver_png.cpp')
| -rw-r--r-- | drivers/png/resource_saver_png.cpp | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/drivers/png/resource_saver_png.cpp b/drivers/png/resource_saver_png.cpp new file mode 100644 index 000000000..a898f6e61 --- /dev/null +++ b/drivers/png/resource_saver_png.cpp @@ -0,0 +1,183 @@ +/*************************************************************************/ +/* resource_saver_png.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* http://www.godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2014 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 "scene/resources/texture.h" +#include "drivers/png/png.h" +#include "os/file_access.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(); + if (img.get_format() > Image::FORMAT_INDEXED_ALPHA) + img.decompress(); + + + ERR_FAIL_COND_V(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 pngb=8; + int cs=0; + + + switch(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 (img.detect_alpha()) { + + img.convert(Image::FORMAT_RGBA); + pngf=PNG_COLOR_TYPE_RGB_ALPHA; + cs=4; + } else { + + img.convert(Image::FORMAT_RGB); + 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); + } + + + DVector<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 */ + + 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"); + } + +} |