Initial commit.

This code based on mana client http://www.gitorious.org/mana/mana
and my private repository.

10 files changed, 762 insertions, 0 deletions

diff --git a/tools/dyecmd/CMakeLists.txt b/tools/dyecmd/CMakeLists.txt
new file mode 100644
index 000000000..485666485
--- /dev/null
+++ b/tools/dyecmd/CMakeLists.txt
@@ -0,0 +1,28 @@
+CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
+
+PROJECT(MANA_DYECOMMAND)
+
+IF (NOT VERSION)
+    SET(VERSION 1.0.0)
+ENDIF()
+
+STRING(REPLACE "." " " _VERSION ${VERSION})
+SEPARATE_ARGUMENTS(_VERSION)
+LIST(LENGTH _VERSION _LEN)
+IF(NOT (_LEN EQUAL 4 OR _LEN EQUAL 3))
+    MESSAGE(FATAL_ERROR "Version needs to be in the form MAJOR.MINOR.RELEASE[.BUILD]")
+ENDIF()
+
+LIST(GET _VERSION 0 VER_MAJOR)
+LIST(GET _VERSION 1 VER_MINOR)
+LIST(GET _VERSION 2 VER_RELEASE)
+IF(_LEN EQUAL 4)
+    LIST(GET _VERSION 3 VER_BUILD)
+ELSE()
+    SET(VER_BUILD 0)
+ENDIF()
+
+# where to look for cmake modules
+SET(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/CMake/Modules)
+
+ADD_SUBDIRECTORY(src)
diff --git a/tools/dyecmd/README b/tools/dyecmd/README
new file mode 100644
index 000000000..050a76559
--- /dev/null
+++ b/tools/dyecmd/README
@@ -0,0 +1,12 @@
+DYECMD
+=======
+
+This tool is used to dye item graphics used by the Mana client according to the
+specification described here: http://wiki.themanaworld.org/index.php/Image_dyeing
+
+The tool expects 3 parameters:
+
+dyecmd <source_image> <target_image> <dye_string>
+e.g.:
+dyecmd "armor-legs-shorts.png" "armor-legs-shorts2.png" "W:#222255,6666ff"
+
diff --git a/tools/dyecmd/dyecmd.cbp b/tools/dyecmd/dyecmd.cbp
new file mode 100644
index 000000000..b3d1bb558
--- /dev/null
+++ b/tools/dyecmd/dyecmd.cbp
@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
+<CodeBlocks_project_file>
+	<FileVersion major="1" minor="6" />
+	<Project>
+		<Option title="dyecmd" />
+		<Option pch_mode="2" />
+		<Option compiler="gcc" />
+		<Build>
+			<Target title="Debug">
+				<Option output="bin\Debug\dyecmd" prefix_auto="1" extension_auto="1" />
+				<Option object_output="obj\Debug\" />
+				<Option type="1" />
+				<Option compiler="gcc" />
+				<Compiler>
+					<Add option="-g" />
+				</Compiler>
+			</Target>
+			<Target title="Release">
+				<Option output="bin\Release\dyecmd" prefix_auto="1" extension_auto="1" />
+				<Option object_output="obj\Release\" />
+				<Option type="1" />
+				<Option compiler="gcc" />
+				<Compiler>
+					<Add option="-O2" />
+				</Compiler>
+				<Linker>
+					<Add option="-s" />
+				</Linker>
+			</Target>
+		</Build>
+		<Compiler>
+			<Add option="-Wall" />
+			<Add option="-fexceptions" />
+			<Add directory="include" />
+		</Compiler>
+		<Linker>
+			<Add library="mingw32" />
+			<Add library="SDLmain" />
+			<Add library="SDL" />
+			<Add library="SDL_image" />
+			<Add library="png12.dll" />
+			<Add directory="lib" />
+		</Linker>
+		<Unit filename="src\dye.cpp" />
+		<Unit filename="src\dye.h" />
+		<Unit filename="src\dyecmd.cpp" />
+		<Unit filename="src\imagewriter.cpp" />
+		<Unit filename="src\imagewriter.h" />
+		<Extensions>
+			<code_completion />
+			<envvars />
+			<debugger />
+			<lib_finder disable_auto="1" />
+		</Extensions>
+	</Project>
+</CodeBlocks_project_file>
diff --git a/tools/dyecmd/run.cmd b/tools/dyecmd/run.cmd
new file mode 100644
index 000000000..86726215f
--- /dev/null
+++ b/tools/dyecmd/run.cmd
@@ -0,0 +1 @@
+bin\debug\dyecmd "armor-legs-shorts.png" "armor-legs-shorts2.png" "W:#222255,6666ff"
\ No newline at end of file
diff --git a/tools/dyecmd/src/CMakeLists.txt b/tools/dyecmd/src/CMakeLists.txt
new file mode 100644
index 000000000..f8e717b78
--- /dev/null
+++ b/tools/dyecmd/src/CMakeLists.txt
@@ -0,0 +1,59 @@
+FIND_PACKAGE(SDL REQUIRED)
+FIND_PACKAGE(SDL_image REQUIRED)
+FIND_PACKAGE(PNG REQUIRED)
+
+IF (CMAKE_COMPILER_IS_GNUCXX)
+    # Help getting compilation warnings
+    SET(CMAKE_CXX_FLAGS "-Wall")
+    IF (WIN32)
+        # This includes enough debug information to get something useful
+        # from Dr. Mingw while keeping binary size down. Almost useless
+        # with gdb, though.
+        SET(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -ggdb0 -gstabs2")
+    ENDIF()
+ENDIF()
+
+SET(FLAGS "-DPACKAGE_VERSION=\\\"${VERSION}\\\"")
+SET(FLAGS "${FLAGS} -DPKG_DATADIR=\\\"${PKG_DATADIR}/\\\"")
+SET(FLAGS "${FLAGS} -DLOCALEDIR=\\\"${LOCALEDIR}/\\\"")
+
+IF (CMAKE_BUILD_TYPE)
+    STRING(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_TOLOWER)
+    IF((CMAKE_BUILD_TYPE_TOLOWER MATCHES debug) OR
+       (CMAKE_BUILD_TYPE_TOLOWER MATCHES relwithdebinfo))
+        SET(FLAGS "${FLAGS} -DDEBUG")
+    ENDIF()
+ENDIF()
+
+INCLUDE_DIRECTORIES(
+    ${CMAKE_CURRENT_SOURCE_DIR}
+    ${SDL_INCLUDE_DIR}
+    ${SDLIMAGE_INCLUDE_DIR}
+    ${PNG_INCLUDE_DIR}
+    )
+
+# Fix some stuff that gets not hidden by mainline modules
+MARK_AS_ADVANCED(SDLIMAGE_INCLUDE_DIR)
+MARK_AS_ADVANCED(SDLIMAGE_LIBRARY)
+MARK_AS_ADVANCED(SDLMAIN_LIBRARY)
+MARK_AS_ADVANCED(SDL_INCLUDE_DIR)
+MARK_AS_ADVANCED(SDL_LIBRARY)
+
+SET(SRCS
+    dye.cpp
+    dye.h
+    dyecmd.cpp
+    imagewriter.cpp
+    imagewriter.h
+    )
+
+SET (PROGRAMS dyecmd)
+
+ADD_EXECUTABLE(dyecmd WIN32 ${SRCS})
+
+TARGET_LINK_LIBRARIES(dyecmd
+    ${SDL_LIBRARY}
+    ${SDLIMAGE_LIBRARY}
+    ${PNG_LIBRARIES})
+
+SET_TARGET_PROPERTIES(dyecmd PROPERTIES COMPILE_FLAGS "${FLAGS}")
diff --git a/tools/dyecmd/src/dye.cpp b/tools/dyecmd/src/dye.cpp
new file mode 100755
index 000000000..77da2ebbb
--- /dev/null
+++ b/tools/dyecmd/src/dye.cpp
@@ -0,0 +1,202 @@
+/*
+ *  The Mana Client
+ *  Copyright (C) 2007-2009  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 <algorithm>
+#include <sstream>
+#include <iostream>
+
+#include "dye.h"
+
+Palette::Palette(const std::string &description)
+{
+    mLoaded = false;
+    int size = description.length();
+    if (size == 0) return;
+    if (description[0] != '#')
+    {
+        std::cout << "Missing # in the palette description "
+        << "in the third parameter." << std::endl;
+        return;
+    }
+
+    int pos = 1;
+    for (;;)
+    {
+        if (pos + 6 > size) break;
+        int v = 0;
+        for (int i = 0; i < 6; ++i)
+        {
+            char c = description[pos + i];
+            int n;
+            if ('0' <= c && c <= '9')
+                n = c - '0';
+            else if ('A' <= c && c <= 'F')
+                n = c - 'A' + 10;
+            else if ('a' <= c && c <= 'f')
+                n = c - 'a' + 10;
+            else
+            {
+                std::cout << "invalid Hexadecimal description: "
+                << description << std::endl;
+                return;
+            }
+
+            v = (v << 4) | n;
+        }
+        Color c = { { v >> 16, v >> 8, v } };
+        mColors.push_back(c);
+        pos += 6;
+        if (pos == size)
+        {
+            mLoaded = true;
+            return;
+        }
+        if (description[pos] != ',')
+            break;
+
+        ++pos;
+    }
+
+    mLoaded = true;
+}
+
+void Palette::getColor(int intensity, int color[3]) const
+{
+    // Return implicit black
+    if (intensity == 0)
+    {
+        color[0] = 0;
+        color[1] = 0;
+        color[2] = 0;
+        return;
+    }
+
+    int last = mColors.size();
+    if (last == 0) return;
+
+    int i = intensity * last / 255;
+    int t = intensity * last % 255;
+
+    int j = t != 0 ? i : i - 1;
+    // Get the exact color if any, the next color otherwise.
+    int r2 = mColors[j].value[0],
+        g2 = mColors[j].value[1],
+        b2 = mColors[j].value[2];
+
+    if (t == 0)
+    {
+        // Exact color.
+        color[0] = r2;
+        color[1] = g2;
+        color[2] = b2;
+        return;
+    }
+
+    // Get the previous color. First color is implicitly black.
+    int r1 = 0, g1 = 0, b1 = 0;
+    if (i > 0)
+    {
+        r1 = mColors[i - 1].value[0];
+        g1 = mColors[i - 1].value[1];
+        b1 = mColors[i - 1].value[2];
+    }
+
+    // Perform a linear interpolation.
+    color[0] = ((255 - t) * r1 + t * r2) / 255;
+    color[1] = ((255 - t) * g1 + t * g2) / 255;
+    color[2] = ((255 - t) * b1 + t * b2) / 255;
+}
+
+Dye::Dye(const std::string &description)
+{
+    mLoaded = false;
+    for (int i = 0; i < 7; ++i)
+        mPalettes[i] = 0;
+
+    if (description.empty()) return;
+
+    std::string::size_type next_pos = 0, length = description.length();
+    do
+    {
+        std::string::size_type pos = next_pos;
+        next_pos = description.find(';', pos);
+        if (next_pos == std::string::npos)
+            next_pos = length;
+        if (next_pos <= pos + 3 || description[pos + 1] != ':')
+        {
+            std::cout << "Dyeing: Missing ':' in channel description."
+            << std::endl;
+            return;
+        }
+        int i = 0;
+        switch (description[pos])
+        {
+            case 'R': i = 0; break;
+            case 'G': i = 1; break;
+            case 'Y': i = 2; break;
+            case 'B': i = 3; break;
+            case 'M': i = 4; break;
+            case 'C': i = 5; break;
+            case 'W': i = 6; break;
+            default:
+                std::cout << "Dyeing: Invalid channel. Not in [R,G,Y,B,M,C,W]"
+                << std::endl;
+                return;
+        }
+        mPalettes[i] = new Palette(
+                           description.substr(pos + 2, next_pos - pos - 2));
+
+        if (!mPalettes[i]->loaded())
+            return;
+
+        ++next_pos;
+    }
+    while (next_pos < length);
+
+    mLoaded = true;
+}
+
+Dye::~Dye()
+{
+    for (int i = 0; i < 7; ++i)
+        delete mPalettes[i];
+}
+
+void Dye::update(int color[3]) const
+{
+    int cmax = std::max(color[0], std::max(color[1], color[2]));
+    if (cmax == 0) return;
+
+    int cmin = std::min(color[0], std::min(color[1], color[2]));
+    int intensity = color[0] + color[1] + color[2];
+
+    if (cmin != cmax &&
+        (cmin != 0 || (intensity != cmax && intensity != 2 * cmax)))
+    {
+        // not pure
+        return;
+    }
+
+    int i = (color[0] != 0) | ((color[1] != 0) << 1) | ((color[2] != 0) << 2);
+
+    if (mPalettes[i - 1])
+        mPalettes[i - 1]->getColor(cmax, color);
+}
diff --git a/tools/dyecmd/src/dye.h b/tools/dyecmd/src/dye.h
new file mode 100755
index 000000000..922f3370e
--- /dev/null
+++ b/tools/dyecmd/src/dye.h
@@ -0,0 +1,105 @@
+/*
+ *  The Mana Client
+ *  Copyright (C) 2007-2009  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/>.
+ */
+
+#ifndef DYE_H
+#define DYE_H
+
+#include <vector>
+
+#include <string>
+
+/**
+ * Class for performing a linear interpolation between colors.
+ */
+class Palette
+{
+    public:
+
+        /**
+         * Creates a palette based on the given string.
+         * The string is either a file name or a sequence of hexadecimal RGB
+         * values separated by ',' and starting with '#'.
+         */
+        Palette(const std::string &);
+
+        /**
+         * Gets a pixel color depending on its intensity.
+         */
+        void getColor(int intensity, int color[3]) const;
+
+        /**
+         * Tells if the palette was successfully loaded.
+         */
+        bool loaded() const
+        { return mLoaded; }
+
+    private:
+
+        struct Color { unsigned char value[3]; };
+
+        std::vector< Color > mColors;
+
+        bool mLoaded;
+};
+
+/**
+ * Class for dispatching pixel-recoloring amongst several palettes.
+ */
+class Dye
+{
+    public:
+
+        /**
+         * Creates a set of palettes based on the given string.
+         *
+         * The parts of string are separated by semi-colons. Each part starts
+         * by an uppercase letter, followed by a colon and then a palette name.
+         */
+        Dye(const std::string &);
+
+        /**
+         * Destroys the associated palettes.
+         */
+        ~Dye();
+
+        /**
+         * Tells if the dye description was successfully loaded.
+         */
+        bool loaded() const
+        { return mLoaded; }
+
+        /**
+         * Modifies a pixel color.
+         */
+        void update(int color[3]) const;
+
+    private:
+
+        /**
+         * The order of the palettes, as well as their uppercase letter, is:
+         *
+         * Red, Green, Yellow, Blue, Magenta, White (or rather gray).
+         */
+        Palette *mPalettes[7];
+        bool mLoaded;
+};
+
+#endif
diff --git a/tools/dyecmd/src/dyecmd.cpp b/tools/dyecmd/src/dyecmd.cpp
new file mode 100755
index 000000000..5e06e500d
--- /dev/null
+++ b/tools/dyecmd/src/dyecmd.cpp
@@ -0,0 +1,155 @@
+/*
+ *  The Mana Client
+ *  Copyright (C) 2008-2009  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 <iostream>
+#include <SDL/SDL.h>
+#include <SDL/SDL_image.h>
+
+#include "dye.h"
+#include "imagewriter.h"
+
+using namespace std;
+
+// return values
+enum ReturnValues
+{
+    RETURN_OK = 0,
+    INVALID_PARAMETER_LIST = 100,
+    INVALID_INPUT_IMAGE = 101,
+    INVALID_OUTPUT_IMAGE = 102,
+    INVALID_DYE_PARAMETER = 105
+};
+
+SDL_Surface* recolor(SDL_Surface* tmpImage, Dye* dye)
+{
+    SDL_PixelFormat rgba;
+    rgba.palette = NULL;
+    rgba.BitsPerPixel = 32;
+    rgba.BytesPerPixel = 4;
+    rgba.Rmask = 0xFF000000; rgba.Rloss = 0; rgba.Rshift = 24;
+    rgba.Gmask = 0x00FF0000; rgba.Gloss = 0; rgba.Gshift = 16;
+    rgba.Bmask = 0x0000FF00; rgba.Bloss = 0; rgba.Bshift = 8;
+    rgba.Amask = 0x000000FF; rgba.Aloss = 0; rgba.Ashift = 0;
+    rgba.colorkey = 0;
+    rgba.alpha = 255;
+
+    SDL_Surface *surf = SDL_ConvertSurface(tmpImage, &rgba, SDL_SWSURFACE);
+    //SDL_FreeSurface(tmpImage); <-- We'll free the surface later.
+
+    Uint32 *pixels = static_cast< Uint32 * >(surf->pixels);
+    for (Uint32 *p_end = pixels + surf->w * surf->h; pixels != p_end; ++pixels)
+    {
+        int alpha = (*pixels >> rgba.Ashift) & 255;
+        if (!alpha) continue;
+        int v[3];
+
+        v[0] = (*pixels >> rgba.Rshift) & 255;
+        v[1] = (*pixels >> rgba.Gshift) & 255;
+        v[2] = (*pixels >> rgba.Bshift) & 255;
+        dye->update(v);
+
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+        *pixels = (v[0] << 24) | (v[1] << 16) | (v[2] << 8) | alpha;
+#else
+        *pixels = v[0] | (v[1] << 8) | (v[2] << 16) | (alpha << 24);
+#endif
+    }
+
+    return surf;
+}
+
+void printHelp()
+{
+    cout << endl
+    << "This tool is used to dye item graphics used by the Mana client "
+    << "according to the specification described here: "
+    << endl << "http://doc.manasource.org/image_dyeing_system"
+    << endl << endl <<
+    "The tool expects 3 parameters:" << endl
+    << "dyecmd <source_image> <target_image> <dye_string>" << endl
+    << "e.g.:" << endl
+    << "dyecmd \"armor-legs-shorts.png\" "
+    <<"\"armor-legs-shorts2.png\" \"W:#222255,6666ff\"" << std::endl;
+}
+
+int main(int argc, char* argv[])
+{
+    Dye* dye = NULL;
+    SDL_Surface* source = NULL, *target = NULL;
+    ReturnValues returnValue = RETURN_OK;
+
+    if (argc > 1 && (!strcmp(argv[1], "--help") || !strcmp(argv[1], "-h")))
+    {
+        printHelp();
+    }
+    // not enough or to many parameters
+    else if (argc != 4)
+    {
+        cout << INVALID_PARAMETER_LIST << " - INVALID_PARAMETER_LIST";
+        printHelp();
+        returnValue = INVALID_PARAMETER_LIST;
+    }
+    else
+    {
+        // Start dyeing process.
+        string inputFile = argv[1];
+        string outputFile = argv[2];
+        string dyeDescription = argv[3];
+
+        dye = new Dye(dyeDescription);
+        if (!dye->loaded())
+        {
+            cout << INVALID_DYE_PARAMETER << " - INVALID_DYE_PARAMETER";
+            printHelp();
+            returnValue = INVALID_DYE_PARAMETER;
+        }
+        else
+        {
+            source = IMG_Load(inputFile.c_str());
+            if (!source)
+            {
+                cout << INVALID_INPUT_IMAGE << " - INVALID_INPUT_IMAGE";
+                printHelp();
+                returnValue = INVALID_INPUT_IMAGE;
+            }
+            else
+            {
+                target = recolor(source, dye);
+
+                if (!ImageWriter::writePNG(target, outputFile))
+                {
+                    cout << INVALID_OUTPUT_IMAGE << " - INVALID_OUTPUT_IMAGE";
+                    printHelp();
+                    returnValue = INVALID_OUTPUT_IMAGE;
+                }
+            } // Valid source image file
+        } // Valid dye parameter
+    } // Parameters ok
+
+    if (source)
+        SDL_FreeSurface(source);
+    if (target)
+        SDL_FreeSurface(target);
+    if (dye)
+        delete dye;
+
+    return returnValue;
+}
diff --git a/tools/dyecmd/src/imagewriter.cpp b/tools/dyecmd/src/imagewriter.cpp
new file mode 100755
index 000000000..d237abbfb
--- /dev/null
+++ b/tools/dyecmd/src/imagewriter.cpp
@@ -0,0 +1,113 @@
+/*
+ *  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;
+}
diff --git a/tools/dyecmd/src/imagewriter.h b/tools/dyecmd/src/imagewriter.h
new file mode 100755
index 000000000..a8bcdf57d
--- /dev/null
+++ b/tools/dyecmd/src/imagewriter.h
@@ -0,0 +1,31 @@
+/*
+ *  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 <iosfwd>
+
+struct SDL_Surface;
+
+class ImageWriter
+{
+    public:
+        static bool writePNG(SDL_Surface *surface,
+                const std::string &filename);
+};