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diff --git a/tools/dyecmd/src/imagewriter.cpp b/tools/dyecmd/src/imagewriter.cpp
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+/*
+ * The Mana Client
+ * Copyright (C) 2004-2009 The Mana World Development Team
+ * Copyright (C) 2009-2010 The Mana Developers
+ *
+ * This file is part of The Mana Client.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "imagewriter.h"
+
+#include <png.h>
+#include <iostream>
+#include <string>
+#include <SDL/SDL.h>
+
+bool ImageWriter::writePNG(SDL_Surface *surface,
+ const std::string &filename)
+{
+ // TODO Maybe someone can make this look nice?
+ FILE *fp = fopen(filename.c_str(), "wb");
+ if (!fp)
+ {
+ std::cout << "PNG writer: Could not open file for writing: "
+ << filename << std::endl;
+ return false;
+ }
+
+ png_structp png_ptr;
+ png_infop info_ptr;
+ png_bytep *row_pointers;
+ int colortype;
+
+ if (SDL_MUSTLOCK(surface)) {
+ SDL_LockSurface(surface);
+ }
+
+ png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
+ if (!png_ptr)
+ {
+ std::cout << "PNG writer: Had trouble creating png_structp"
+ << std::endl;
+ return false;
+ }
+
+ info_ptr = png_create_info_struct(png_ptr);
+ if (!info_ptr)
+ {
+ png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
+ std::cout << "PNG writer: Could not create png_info" << std::endl;
+ return false;
+ }
+
+ if (setjmp(png_jmpbuf(png_ptr)))
+ {
+ png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
+ std::cout << "PNG writer: problem writing to : "
+ << filename << std::endl;
+ return false;
+ }
+
+ png_init_io(png_ptr, fp);
+
+ colortype = (surface->format->BitsPerPixel == 24) ?
+ PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA;
+
+ png_set_IHDR(png_ptr, info_ptr, surface->w, surface->h, 8, colortype,
+ PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
+
+ png_write_info(png_ptr, info_ptr);
+
+ png_set_packing(png_ptr);
+
+ row_pointers = new png_bytep[surface->h];
+ if (!row_pointers)
+ {
+ std::cout
+ << "PNG writer: Had trouble converting surface to row pointers"
+ << std::endl;
+ return false;
+ }
+
+ for (int i = 0; i < surface->h; i++)
+ {
+ row_pointers[i] = (png_bytep)(Uint8 *)surface->pixels + i * surface->pitch;
+ }
+
+ png_write_image(png_ptr, row_pointers);
+ png_write_end(png_ptr, info_ptr);
+
+ fclose(fp);
+
+ delete [] row_pointers;
+
+ png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
+
+ if (SDL_MUSTLOCK(surface))
+ SDL_UnlockSurface(surface);
+
+ return true;
+}