Move dyepalatte into separate file.

8 files changed, 496 insertions, 422 deletions

diff --git a/src/resources/dye.cpp b/src/resources/dye.cpp
index ce15c5b2d..3f6929c5c 100644
--- a/src/resources/dye.cpp
+++ b/src/resources/dye.cpp
@@ -24,6 +24,8 @@
 
 #include "logger.h"
 
+#include "resources/dyepalette.h"
+
 #include "resources/db/palettedb.h"
 
 #include "utils/delete2.h"
@@ -35,372 +37,6 @@
 
 #include "debug.h"
 
-DyePalette::DyePalette(const std::string &description,
-                       const uint8_t blockSize) :
-    mColors()
-{
-    const size_t size = static_cast<size_t>(description.length());
-    if (size == 0)
-        return;
-
-    if (description[0] == '#')
-    {
-        size_t pos = 1;
-        for ( ; ; )
-        {
-            if (pos + blockSize > size)
-                break;
-
-            DyeColor color(0, 0, 0, 0);
-
-            for (size_t i = 0, colorIdx = 0; i < blockSize && colorIdx < 4;
-                 i += 2, colorIdx ++)
-            {
-                color.value[colorIdx] = static_cast<unsigned char>((
-                    hexDecode(description[pos + i]) << 4)
-                    + hexDecode(description[pos + i + 1]));
-            }
-            mColors.push_back(color);
-            pos += blockSize;
-
-            if (pos == size)
-                return;
-            if (description[pos] != ',')
-                break;
-
-            ++pos;
-        }
-    }
-    else if (description[0] == '@')
-    {
-        size_t pos = 1;
-        for ( ; pos < size ; )
-        {
-            const size_t idx = description.find(',', pos);
-            if (idx == std::string::npos)
-                return;
-            if (idx == pos)
-                break;
-            mColors.push_back(PaletteDB::getColor(
-                description.substr(pos, idx - pos)));
-            pos = idx + 1;
-        }
-    }
-
-    logger->log("Error, invalid embedded palette: %s", description.c_str());
-}
-
-unsigned int DyePalette::hexDecode(const signed char c)
-{
-    if ('0' <= c && c <= '9')
-        return c - '0';
-    else if ('A' <= c && c <= 'F')
-        return c - 'A' + 10;
-    else if ('a' <= c && c <= 'f')
-        return c - 'a' + 10;
-    else
-        return 0;
-}
-
-void DyePalette::getColor(const int intensity, int color[3]) const
-{
-    if (intensity == 0)
-    {
-        color[0] = 0;
-        color[1] = 0;
-        color[2] = 0;
-        return;
-    }
-
-    const int last = static_cast<int>(mColors.size());
-    if (last == 0)
-        return;
-
-    const int intLast = intensity * last;
-    const int i = intLast / 255;
-    const int t = intLast % 255;
-
-    int j = t != 0 ? i : i - 1;
-
-    if (j >= last)
-        j = 0;
-
-    // Get the exact color if any, the next color otherwise.
-    const int r2 = mColors[j].value[0];
-    const int g2 = mColors[j].value[1];
-    const int 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 && i < last + 1)
-    {
-        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;
-}
-
-void DyePalette::getColor(double intensity, int color[3]) const
-{
-    // Nothing to do here
-    if (mColors.empty())
-        return;
-
-    // Force range
-    if (intensity > 1.0)
-        intensity = 1.0;
-    else if (intensity < 0.0)
-        intensity = 0.0;
-
-    // Scale up
-    intensity *= static_cast<double>(mColors.size() - 1);
-
-    // Color indices
-    const int i = static_cast<int>(floor(intensity));
-    const int j = static_cast<int>(ceil(intensity));
-
-    if (i == j)
-    {
-        // Exact color.
-        color[0] = mColors[i].value[0];
-        color[1] = mColors[i].value[1];
-        color[2] = mColors[i].value[2];
-        return;
-    }
-
-    intensity -= i;
-    const double rest = 1 - intensity;
-
-    // Get the colors
-    const int r1 = mColors[i].value[0];
-    const int g1 = mColors[i].value[1];
-    const int b1 = mColors[i].value[2];
-    const int r2 = mColors[j].value[0];
-    const int g2 = mColors[j].value[1];
-    const int b2 = mColors[j].value[2];
-
-    // Perform the interpolation.
-    color[0] = static_cast<int>(rest * r1 + intensity * r2);
-    color[1] = static_cast<int>(rest * g1 + intensity * g2);
-    color[2] = static_cast<int>(rest * b1 + intensity * b2);
-}
-
-void DyePalette::replaceSColor(uint32_t *restrict pixels,
-                               const int bufSize) const
-{
-    std::vector<DyeColor>::const_iterator it_end = mColors.end();
-    const size_t sz = mColors.size();
-    if (!sz)
-        return;
-    if (sz % 2)
-        -- it_end;
-
-    for (uint32_t *p_end = pixels + static_cast<size_t>(bufSize);
-         pixels != p_end;
-         ++pixels)
-    {
-        uint8_t *const p = reinterpret_cast<uint8_t *>(pixels);
-#if SDL_BYTEORDER == SDL_BIG_ENDIAN
-        const int alpha = *pixels & 0xff000000;
-        const unsigned int data = (*pixels) & 0x00ffffff;
-#else
-        const int alpha = *p & 0xff;
-        const unsigned int data = (*pixels) & 0xffffff00;
-#endif
-//        logger->log("c:%04d   %08x", c, *pixels);
-//        logger->log("data:    %08x", data);
-        if (!alpha)
-        {
-//            logger->log("skip:    %08x", *pixels);
-            continue;
-        }
-
-        std::vector<DyeColor>::const_iterator it = mColors.begin();
-        while (it != it_end)
-        {
-            const DyeColor &col = *it;
-            ++ it;
-            const DyeColor &col2 = *it;
-
-#if SDL_BYTEORDER == SDL_BIG_ENDIAN
-            const unsigned int coldata = (col.value[2] << 16)
-                | (col.value[1] << 8) | (col.value[0]);
-#else
-            const unsigned int coldata = (col.value[2] << 8)
-                | (col.value[1] << 16) | (col.value[0] << 24);
-#endif
-//            logger->log("coldata: %08x", coldata);
-            if (data == coldata)
-            {
-//                logger->log("correct");
-                p[3] = col2.value[0];
-                p[2] = col2.value[1];
-                p[1] = col2.value[2];
-                break;
-            }
-
-            ++ it;
-        }
-    }
-}
-
-void DyePalette::replaceAColor(uint32_t *restrict pixels,
-                               const int bufSize) const
-{
-    std::vector<DyeColor>::const_iterator it_end = mColors.end();
-    const size_t sz = mColors.size();
-    if (!sz)
-        return;
-    if (sz % 2)
-        -- it_end;
-
-    for (uint32_t *p_end = pixels + static_cast<size_t>(bufSize);
-         pixels != p_end;
-         ++pixels)
-    {
-        uint8_t *const p = reinterpret_cast<uint8_t *>(pixels);
-        const unsigned int data = *pixels;
-
-        std::vector<DyeColor>::const_iterator it = mColors.begin();
-        while (it != it_end)
-        {
-            const DyeColor &col = *it;
-            ++ it;
-            const DyeColor &col2 = *it;
-
-#if SDL_BYTEORDER == SDL_BIG_ENDIAN
-            const unsigned int coldata = (col.value[3] << 24)
-                | (col.value[2] << 16) | (col.value[1] << 8) | (col.value[0]);
-#else
-            const unsigned int coldata = (col.value[3]) | (col.value[2] << 8)
-                | (col.value[1] << 16) | (col.value[0] << 24);
-#endif
-
-            if (data == coldata)
-            {
-                p[3] = col2.value[0];
-                p[2] = col2.value[1];
-                p[1] = col2.value[2];
-                p[0] = col2.value[3];
-                break;
-            }
-
-            ++ it;
-        }
-    }
-}
-
-void DyePalette::replaceSOGLColor(uint32_t *restrict pixels,
-                                  const int bufSize) const
-{
-    std::vector<DyeColor>::const_iterator it_end = mColors.end();
-    const size_t sz = mColors.size();
-    if (!sz)
-        return;
-    if (sz % 2)
-        -- it_end;
-
-    for (uint32_t *p_end = pixels + static_cast<size_t>(bufSize);
-         pixels != p_end;
-         ++pixels)
-    {
-        uint8_t *const p = reinterpret_cast<uint8_t *>(pixels);
-#if SDL_BYTEORDER == SDL_BIG_ENDIAN
-        const int alpha = *p & 0xff;
-        const unsigned int data = (*pixels) & 0xffffff00;
-#else
-        const int alpha = *pixels & 0xff000000;
-        const unsigned int data = (*pixels) & 0x00ffffff;
-#endif
-        if (!alpha)
-            continue;
-
-        std::vector<DyeColor>::const_iterator it = mColors.begin();
-        while (it != it_end)
-        {
-            const DyeColor &col = *it;
-            ++ it;
-            const DyeColor &col2 = *it;
-
-#if SDL_BYTEORDER == SDL_BIG_ENDIAN
-            const unsigned int coldata = (col.value[0] << 24)
-                | (col.value[1] << 16) | (col.value[2] << 8);
-#else
-            const unsigned int coldata = (col.value[0])
-                | (col.value[1] << 8) | (col.value[2] << 16);
-#endif
-            if (data == coldata)
-            {
-                p[0] = col2.value[0];
-                p[1] = col2.value[1];
-                p[2] = col2.value[2];
-                break;
-            }
-
-            ++ it;
-        }
-    }
-}
-
-void DyePalette::replaceAOGLColor(uint32_t *restrict pixels,
-                                  const int bufSize) const
-{
-    std::vector<DyeColor>::const_iterator it_end = mColors.end();
-    const size_t sz = mColors.size();
-    if (!sz)
-        return;
-    if (sz % 2)
-        -- it_end;
-
-    for (uint32_t *p_end = pixels + static_cast<size_t>(bufSize);
-         pixels != p_end;
-         ++pixels)
-    {
-        uint8_t *const p = reinterpret_cast<uint8_t *>(pixels);
-        const unsigned int data = *pixels;
-
-        std::vector<DyeColor>::const_iterator it = mColors.begin();
-        while (it != it_end)
-        {
-            const DyeColor &col = *it;
-            ++ it;
-            const DyeColor &col2 = *it;
-
-#if SDL_BYTEORDER == SDL_BIG_ENDIAN
-            const unsigned int coldata = (col.value[0] << 24)
-                | (col.value[1] << 16) | (col.value[2] << 8) | col.value[3];
-#else
-            const unsigned int coldata = (col.value[0]) | (col.value[1] << 8)
-                | (col.value[2] << 16) | (col.value[3] << 24);
-#endif
-            if (data == coldata)
-            {
-                p[0] = col2.value[0];
-                p[1] = col2.value[1];
-                p[2] = col2.value[2];
-                p[3] = col2.value[3];
-                break;
-            }
-
-            ++ it;
-        }
-    }
-}
-
 Dye::Dye(const std::string &description)
 {
     for (int i = 0; i < dyePalateSize; ++i)
diff --git a/src/resources/dye.h b/src/resources/dye.h
index 80da36506..ad2253ea3 100644
--- a/src/resources/dye.h
+++ b/src/resources/dye.h
@@ -30,65 +30,13 @@
 
 #include "localconsts.h"
 
+class DyePalette;
+
 const int dyePalateSize = 9;
 const int sPaleteIndex = 7;
 const int aPaleteIndex = 8;
 
 /**
- * Class for performing a linear interpolation between colors.
- */
-class DyePalette final
-{
-    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 '#'.
-         */
-        DyePalette(const std::string &pallete, const uint8_t blockSize);
-
-        A_DELETE_COPY(DyePalette)
-
-        /**
-         * Gets a pixel color depending on its intensity. First color is
-         * implicitly black (0, 0, 0).
-         */
-        void getColor(const int intensity, int color[3]) const;
-
-        /**
-         * Gets a pixel color depending on its intensity.
-         */
-        void getColor(double intensity, int color[3]) const;
-
-        /**
-         * replace colors for SDL for S dye.
-         */
-        void replaceSColor(uint32_t *restrict pixels, const int bufSize) const;
-
-        /**
-         * replace colors for SDL for S dye.
-         */
-        void replaceAColor(uint32_t *restrict pixels, const int bufSize) const;
-
-        /**
-         * replace colors for OpenGL for S dye.
-         */
-        void replaceSOGLColor(uint32_t *restrict pixels,
-                              const int bufSize) const;
-
-        /**
-         * replace colors for OpenGL for A dye.
-         */
-        void replaceAOGLColor(uint32_t *restrict pixels,
-                              const int bufSize) const;
-
-        static unsigned int hexDecode(const signed char c) A_WARN_UNUSED;
-
-    private:
-        std::vector<DyeColor> mColors;
-};
-
-/**
  * Class for dispatching pixel-recoloring amongst several palettes.
  */
 class Dye final
diff --git a/src/resources/dyepalette.cpp b/src/resources/dyepalette.cpp
new file mode 100644
index 000000000..ab1e2c2f2
--- /dev/null
+++ b/src/resources/dyepalette.cpp
@@ -0,0 +1,400 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2007-2009  The Mana World Development Team
+ *  Copyright (C) 2009-2010  The Mana Developers
+ *  Copyright (C) 2011-2014  The ManaPlus Developers
+ *
+ *  This file is part of The ManaPlus 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 "resources/dyepalette.h"
+
+#include "logger.h"
+
+#include "resources/db/palettedb.h"
+
+#include <cmath>
+#include <sstream>
+
+#include <SDL_endian.h>
+
+#include "debug.h"
+
+DyePalette::DyePalette(const std::string &description,
+                       const uint8_t blockSize) :
+    mColors()
+{
+    const size_t size = static_cast<size_t>(description.length());
+    if (size == 0)
+        return;
+
+    if (description[0] == '#')
+    {
+        size_t pos = 1;
+        for ( ; ; )
+        {
+            if (pos + blockSize > size)
+                break;
+
+            DyeColor color(0, 0, 0, 0);
+
+            for (size_t i = 0, colorIdx = 0; i < blockSize && colorIdx < 4;
+                 i += 2, colorIdx ++)
+            {
+                color.value[colorIdx] = static_cast<unsigned char>((
+                    hexDecode(description[pos + i]) << 4)
+                    + hexDecode(description[pos + i + 1]));
+            }
+            mColors.push_back(color);
+            pos += blockSize;
+
+            if (pos == size)
+                return;
+            if (description[pos] != ',')
+                break;
+
+            ++pos;
+        }
+    }
+    else if (description[0] == '@')
+    {
+        size_t pos = 1;
+        for ( ; pos < size ; )
+        {
+            const size_t idx = description.find(',', pos);
+            if (idx == std::string::npos)
+                return;
+            if (idx == pos)
+                break;
+            mColors.push_back(PaletteDB::getColor(
+                description.substr(pos, idx - pos)));
+            pos = idx + 1;
+        }
+    }
+
+    logger->log("Error, invalid embedded palette: %s", description.c_str());
+}
+
+unsigned int DyePalette::hexDecode(const signed char c)
+{
+    if ('0' <= c && c <= '9')
+        return c - '0';
+    else if ('A' <= c && c <= 'F')
+        return c - 'A' + 10;
+    else if ('a' <= c && c <= 'f')
+        return c - 'a' + 10;
+    else
+        return 0;
+}
+
+void DyePalette::getColor(const int intensity, int color[3]) const
+{
+    if (intensity == 0)
+    {
+        color[0] = 0;
+        color[1] = 0;
+        color[2] = 0;
+        return;
+    }
+
+    const int last = static_cast<int>(mColors.size());
+    if (last == 0)
+        return;
+
+    const int intLast = intensity * last;
+    const int i = intLast / 255;
+    const int t = intLast % 255;
+
+    int j = t != 0 ? i : i - 1;
+
+    if (j >= last)
+        j = 0;
+
+    // Get the exact color if any, the next color otherwise.
+    const int r2 = mColors[j].value[0];
+    const int g2 = mColors[j].value[1];
+    const int 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 && i < last + 1)
+    {
+        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;
+}
+
+void DyePalette::getColor(double intensity, int color[3]) const
+{
+    // Nothing to do here
+    if (mColors.empty())
+        return;
+
+    // Force range
+    if (intensity > 1.0)
+        intensity = 1.0;
+    else if (intensity < 0.0)
+        intensity = 0.0;
+
+    // Scale up
+    intensity *= static_cast<double>(mColors.size() - 1);
+
+    // Color indices
+    const int i = static_cast<int>(floor(intensity));
+    const int j = static_cast<int>(ceil(intensity));
+
+    if (i == j)
+    {
+        // Exact color.
+        color[0] = mColors[i].value[0];
+        color[1] = mColors[i].value[1];
+        color[2] = mColors[i].value[2];
+        return;
+    }
+
+    intensity -= i;
+    const double rest = 1 - intensity;
+
+    // Get the colors
+    const int r1 = mColors[i].value[0];
+    const int g1 = mColors[i].value[1];
+    const int b1 = mColors[i].value[2];
+    const int r2 = mColors[j].value[0];
+    const int g2 = mColors[j].value[1];
+    const int b2 = mColors[j].value[2];
+
+    // Perform the interpolation.
+    color[0] = static_cast<int>(rest * r1 + intensity * r2);
+    color[1] = static_cast<int>(rest * g1 + intensity * g2);
+    color[2] = static_cast<int>(rest * b1 + intensity * b2);
+}
+
+void DyePalette::replaceSColor(uint32_t *restrict pixels,
+                               const int bufSize) const
+{
+    std::vector<DyeColor>::const_iterator it_end = mColors.end();
+    const size_t sz = mColors.size();
+    if (!sz)
+        return;
+    if (sz % 2)
+        -- it_end;
+
+    for (uint32_t *p_end = pixels + static_cast<size_t>(bufSize);
+         pixels != p_end;
+         ++pixels)
+    {
+        uint8_t *const p = reinterpret_cast<uint8_t *>(pixels);
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+        const int alpha = *pixels & 0xff000000;
+        const unsigned int data = (*pixels) & 0x00ffffff;
+#else
+        const int alpha = *p & 0xff;
+        const unsigned int data = (*pixels) & 0xffffff00;
+#endif
+//        logger->log("c:%04d   %08x", c, *pixels);
+//        logger->log("data:    %08x", data);
+        if (!alpha)
+        {
+//            logger->log("skip:    %08x", *pixels);
+            continue;
+        }
+
+        std::vector<DyeColor>::const_iterator it = mColors.begin();
+        while (it != it_end)
+        {
+            const DyeColor &col = *it;
+            ++ it;
+            const DyeColor &col2 = *it;
+
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+            const unsigned int coldata = (col.value[2] << 16)
+                | (col.value[1] << 8) | (col.value[0]);
+#else
+            const unsigned int coldata = (col.value[2] << 8)
+                | (col.value[1] << 16) | (col.value[0] << 24);
+#endif
+//            logger->log("coldata: %08x", coldata);
+            if (data == coldata)
+            {
+//                logger->log("correct");
+                p[3] = col2.value[0];
+                p[2] = col2.value[1];
+                p[1] = col2.value[2];
+                break;
+            }
+
+            ++ it;
+        }
+    }
+}
+
+void DyePalette::replaceAColor(uint32_t *restrict pixels,
+                               const int bufSize) const
+{
+    std::vector<DyeColor>::const_iterator it_end = mColors.end();
+    const size_t sz = mColors.size();
+    if (!sz)
+        return;
+    if (sz % 2)
+        -- it_end;
+
+    for (uint32_t *p_end = pixels + static_cast<size_t>(bufSize);
+         pixels != p_end;
+         ++pixels)
+    {
+        uint8_t *const p = reinterpret_cast<uint8_t *>(pixels);
+        const unsigned int data = *pixels;
+
+        std::vector<DyeColor>::const_iterator it = mColors.begin();
+        while (it != it_end)
+        {
+            const DyeColor &col = *it;
+            ++ it;
+            const DyeColor &col2 = *it;
+
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+            const unsigned int coldata = (col.value[3] << 24)
+                | (col.value[2] << 16) | (col.value[1] << 8) | (col.value[0]);
+#else
+            const unsigned int coldata = (col.value[3]) | (col.value[2] << 8)
+                | (col.value[1] << 16) | (col.value[0] << 24);
+#endif
+
+            if (data == coldata)
+            {
+                p[3] = col2.value[0];
+                p[2] = col2.value[1];
+                p[1] = col2.value[2];
+                p[0] = col2.value[3];
+                break;
+            }
+
+            ++ it;
+        }
+    }
+}
+
+void DyePalette::replaceSOGLColor(uint32_t *restrict pixels,
+                                  const int bufSize) const
+{
+    std::vector<DyeColor>::const_iterator it_end = mColors.end();
+    const size_t sz = mColors.size();
+    if (!sz)
+        return;
+    if (sz % 2)
+        -- it_end;
+
+    for (uint32_t *p_end = pixels + static_cast<size_t>(bufSize);
+         pixels != p_end;
+         ++pixels)
+    {
+        uint8_t *const p = reinterpret_cast<uint8_t *>(pixels);
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+        const int alpha = *p & 0xff;
+        const unsigned int data = (*pixels) & 0xffffff00;
+#else
+        const int alpha = *pixels & 0xff000000;
+        const unsigned int data = (*pixels) & 0x00ffffff;
+#endif
+        if (!alpha)
+            continue;
+
+        std::vector<DyeColor>::const_iterator it = mColors.begin();
+        while (it != it_end)
+        {
+            const DyeColor &col = *it;
+            ++ it;
+            const DyeColor &col2 = *it;
+
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+            const unsigned int coldata = (col.value[0] << 24)
+                | (col.value[1] << 16) | (col.value[2] << 8);
+#else
+            const unsigned int coldata = (col.value[0])
+                | (col.value[1] << 8) | (col.value[2] << 16);
+#endif
+            if (data == coldata)
+            {
+                p[0] = col2.value[0];
+                p[1] = col2.value[1];
+                p[2] = col2.value[2];
+                break;
+            }
+
+            ++ it;
+        }
+    }
+}
+
+void DyePalette::replaceAOGLColor(uint32_t *restrict pixels,
+                                  const int bufSize) const
+{
+    std::vector<DyeColor>::const_iterator it_end = mColors.end();
+    const size_t sz = mColors.size();
+    if (!sz)
+        return;
+    if (sz % 2)
+        -- it_end;
+
+    for (uint32_t *p_end = pixels + static_cast<size_t>(bufSize);
+         pixels != p_end;
+         ++pixels)
+    {
+        uint8_t *const p = reinterpret_cast<uint8_t *>(pixels);
+        const unsigned int data = *pixels;
+
+        std::vector<DyeColor>::const_iterator it = mColors.begin();
+        while (it != it_end)
+        {
+            const DyeColor &col = *it;
+            ++ it;
+            const DyeColor &col2 = *it;
+
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+            const unsigned int coldata = (col.value[0] << 24)
+                | (col.value[1] << 16) | (col.value[2] << 8) | col.value[3];
+#else
+            const unsigned int coldata = (col.value[0]) | (col.value[1] << 8)
+                | (col.value[2] << 16) | (col.value[3] << 24);
+#endif
+            if (data == coldata)
+            {
+                p[0] = col2.value[0];
+                p[1] = col2.value[1];
+                p[2] = col2.value[2];
+                p[3] = col2.value[3];
+                break;
+            }
+
+            ++ it;
+        }
+    }
+}
diff --git a/src/resources/dyepalette.h b/src/resources/dyepalette.h
new file mode 100644
index 000000000..a2f555b4f
--- /dev/null
+++ b/src/resources/dyepalette.h
@@ -0,0 +1,87 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2007-2009  The Mana World Development Team
+ *  Copyright (C) 2009-2010  The Mana Developers
+ *  Copyright (C) 2011-2014  The ManaPlus Developers
+ *
+ *  This file is part of The ManaPlus 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 RESOURCES_DYEPALETTE_H
+#define RESOURCES_DYEPALETTE_H
+
+#include "resources/dyecolor.h"
+
+#include <string>
+#include <vector>
+
+#include "localconsts.h"
+
+/**
+ * Class for performing a linear interpolation between colors.
+ */
+class DyePalette final
+{
+    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 '#'.
+         */
+        DyePalette(const std::string &pallete, const uint8_t blockSize);
+
+        A_DELETE_COPY(DyePalette)
+
+        /**
+         * Gets a pixel color depending on its intensity. First color is
+         * implicitly black (0, 0, 0).
+         */
+        void getColor(const int intensity, int color[3]) const;
+
+        /**
+         * Gets a pixel color depending on its intensity.
+         */
+        void getColor(double intensity, int color[3]) const;
+
+        /**
+         * replace colors for SDL for S dye.
+         */
+        void replaceSColor(uint32_t *restrict pixels, const int bufSize) const;
+
+        /**
+         * replace colors for SDL for S dye.
+         */
+        void replaceAColor(uint32_t *restrict pixels, const int bufSize) const;
+
+        /**
+         * replace colors for OpenGL for S dye.
+         */
+        void replaceSOGLColor(uint32_t *restrict pixels,
+                              const int bufSize) const;
+
+        /**
+         * replace colors for OpenGL for A dye.
+         */
+        void replaceAOGLColor(uint32_t *restrict pixels,
+                              const int bufSize) const;
+
+        static unsigned int hexDecode(const signed char c) A_WARN_UNUSED;
+
+    private:
+        std::vector<DyeColor> mColors;
+};
+
+#endif  // RESOURCES_DYEPALETTE_H
diff --git a/src/resources/imagehelper.cpp b/src/resources/imagehelper.cpp
index d72550767..ad0c98ad1 100644
--- a/src/resources/imagehelper.cpp
+++ b/src/resources/imagehelper.cpp
@@ -26,6 +26,7 @@
 #include "main.h"
 
 #include "resources/dye.h"
+#include "resources/dyepalette.h"
 
 #include "utils/sdlcheckutils.h"
 
diff --git a/src/resources/openglimagehelper.cpp b/src/resources/openglimagehelper.cpp
index dc0218d65..33330c568 100644
--- a/src/resources/openglimagehelper.cpp
+++ b/src/resources/openglimagehelper.cpp
@@ -34,6 +34,7 @@
 #include "render/safeopenglgraphics.h"
 
 #include "resources/dye.h"
+#include "resources/dyepalette.h"
 #include "resources/image.h"
 
 #include "utils/sdlcheckutils.h"
diff --git a/src/resources/sdl2imagehelper.cpp b/src/resources/sdl2imagehelper.cpp
index b31622e51..3cda18c51 100644
--- a/src/resources/sdl2imagehelper.cpp
+++ b/src/resources/sdl2imagehelper.cpp
@@ -25,6 +25,7 @@
 #include "resources/sdl2imagehelper.h"
 
 #include "resources/dye.h"
+#include "resources/dyepalette.h"
 #include "resources/resourcemanager.h"
 
 #include "logger.h"
diff --git a/src/resources/sdlimagehelper.cpp b/src/resources/sdlimagehelper.cpp
index 0858a9908..16f0b45ba 100644
--- a/src/resources/sdlimagehelper.cpp
+++ b/src/resources/sdlimagehelper.cpp
@@ -24,11 +24,11 @@
 
 #include "resources/sdlimagehelper.h"
 
-#include "resources/dye.h"
-
 #include "logger.h"
 #include "main.h"
 
+#include "resources/dye.h"
+#include "resources/dyepalette.h"
 #include "resources/image.h"
 
 #include "utils/sdlcheckutils.h"