Add initial version of mobile OpenGL backend.

16 files changed, 1474 insertions, 17 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 96ac9e95d..77b9792b6 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -601,6 +601,8 @@ SET(SRCS
     maplayer.h
     mgl.cpp
     mgl.h
+    mobileopenglgraphics.cpp
+    mobileopenglgraphics.h
     normalopenglgraphics.cpp
     normalopenglgraphics.h
     particle.cpp
diff --git a/src/Makefile.am b/src/Makefile.am
index b86617e23..09c47c21e 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -605,7 +605,9 @@ manaplus_SOURCES += gui/widgets/avatarlistbox.cpp \
 	      maplayer.h \
 	      mgl.cpp \
 	      mgl.h \
-	      normalopenglgraphics.cpp\
+	      mobileopenglgraphics.cpp \
+	      mobileopenglgraphics.h \
+	      normalopenglgraphics.cpp \
 	      normalopenglgraphics.h \
 	      particle.cpp \
 	      particle.h \
diff --git a/src/graphics.cpp b/src/graphics.cpp
index 9f45899f5..4c1d4e832 100644
--- a/src/graphics.cpp
+++ b/src/graphics.cpp
@@ -174,7 +174,7 @@ bool Graphics::setOpenGLMode()
     bool rectTex = graphicsManager.supportExtension(
         "GL_ARB_texture_rectangle");
     if (rectTex && OpenGLImageHelper::getInternalTextureType() == 4
-        && config.getBoolValue("rectangulartextures")
+        && getOpenGL() != 3 && config.getBoolValue("rectangulartextures")
         && !graphicsManager.isUseTextureSampler())
     {
         logger->log1("using GL_ARB_texture_rectangle");
diff --git a/src/graphicsmanager.cpp b/src/graphicsmanager.cpp
index f03d784a1..4c97ea327 100644
--- a/src/graphicsmanager.cpp
+++ b/src/graphicsmanager.cpp
@@ -219,6 +219,12 @@ void GraphicsManager::initGraphics(bool noOpenGL)
             mainGraphics = new SafeOpenGLGraphics;
             mUseTextureSampler = false;
             break;
+        case 3:
+            imageHelper = new OpenGLImageHelper;
+            sdlImageHelper = new SDLImageHelper;
+            mainGraphics = new MobileOpenGLGraphics;
+            mUseTextureSampler = false;
+            break;
     };
     mUseAtlases = imageHelper->useOpenGL()
         && config.getBoolValue("useAtlases");
diff --git a/src/graphicsvertexes.cpp b/src/graphicsvertexes.cpp
index 407d5ef0c..aefe594fd 100644
--- a/src/graphicsvertexes.cpp
+++ b/src/graphicsvertexes.cpp
@@ -25,6 +25,7 @@
 #include "debug.h"
 
 #ifdef USE_OPENGL
+unsigned int vertexBufSize = 500;
 int GraphicsVertexes::mUseOpenGL = 0;
 #endif
 
@@ -43,10 +44,12 @@ NormalOpenGLGraphicsVertexes::NormalOpenGLGraphicsVertexes() :
     ptr(0),
     mFloatTexArray(nullptr),
     mIntTexArray(nullptr),
-    mIntVertArray(nullptr)
+    mIntVertArray(nullptr),
+    mShortVertArray(nullptr)
 {
     mFloatTexPool.reserve(30);
     mIntVertPool.reserve(30);
+    mShortVertPool.reserve(30);
     mIntTexPool.reserve(30);
     mVp.reserve(30);
 }
@@ -72,6 +75,13 @@ void NormalOpenGLGraphicsVertexes::clear()
     }
     mIntVertPool.clear();
 
+    for (std::vector<GLshort*>::iterator it = mShortVertPool.begin();
+        it != mShortVertPool.end(); ++ it)
+    {
+        delete [] (*it);
+    }
+    mShortVertPool.clear();
+
     for (std::vector<GLint*>::iterator it = mIntTexPool.begin();
         it != mIntTexPool.end(); ++ it)
     {
@@ -86,6 +96,7 @@ void NormalOpenGLGraphicsVertexes::clear()
         delete []mFloatTexArray;
         delete []mIntTexArray;
         delete []mIntVertArray;
+        delete []mShortVertArray;
     }
 }
 
@@ -108,6 +119,13 @@ GLint *NormalOpenGLGraphicsVertexes::switchIntVertArray()
     return mIntVertArray;
 }
 
+GLshort *NormalOpenGLGraphicsVertexes::switchShortVertArray()
+{
+    mShortVertArray = new GLshort[vertexBufSize * 4 + 30];
+    mShortVertPool.push_back(mShortVertArray);
+    return mShortVertArray;
+}
+
 GLint *NormalOpenGLGraphicsVertexes::switchIntTexArray()
 {
     mIntTexArray = new GLint[vertexBufSize * 4 + 30];
@@ -169,6 +187,20 @@ GLint *NormalOpenGLGraphicsVertexes::continueIntVertArray()
     return mIntVertArray;
 }
 
+GLshort *NormalOpenGLGraphicsVertexes::continueShortVertArray()
+{
+    if (mShortVertPool.empty())
+    {
+        mShortVertArray = new GLshort[vertexBufSize * 4 + 30];
+        mShortVertPool.push_back(mShortVertArray);
+    }
+    else
+    {
+        mShortVertArray = mShortVertPool.back();
+    }
+    return mShortVertArray;
+}
+
 GLint *NormalOpenGLGraphicsVertexes::continueIntTexArray()
 {
     if (mIntTexPool.empty())
diff --git a/src/graphicsvertexes.h b/src/graphicsvertexes.h
index 789e9fd34..6a2e30664 100644
--- a/src/graphicsvertexes.h
+++ b/src/graphicsvertexes.h
@@ -37,8 +37,9 @@
 
 #include <SDL/SDL.h>
 
-#include "safeopenglgraphics.h"
+#include "mobileopenglgraphics.h"
 #include "normalopenglgraphics.h"
+#include "safeopenglgraphics.h"
 #endif
 
 #include "resources/image.h"
@@ -85,12 +86,17 @@ class NormalOpenGLGraphicsVertexes final
 
         GLint *switchIntTexArray();
 
+        GLshort *switchShortVertArray();
+
         std::vector<GLfloat*> *getFloatTexPool()
         { return &mFloatTexPool; }
 
         std::vector<GLint*> *getIntVertPool()
         { return &mIntVertPool; }
 
+        std::vector<GLshort*> *getShortVertPool()
+        { return &mShortVertPool; }
+
         std::vector<GLint*> *getIntTexPool()
         { return &mIntTexPool; }
 
@@ -100,6 +106,8 @@ class NormalOpenGLGraphicsVertexes final
 
         GLint *continueIntVertArray();
 
+        GLshort *continueShortVertArray();
+
         GLint *continueIntTexArray();
 
         int continueVp();
@@ -118,9 +126,11 @@ class NormalOpenGLGraphicsVertexes final
         GLfloat *mFloatTexArray;
         GLint *mIntTexArray;
         GLint *mIntVertArray;
+        GLshort *mShortVertArray;
         std::vector<int> mVp;
         std::vector<GLfloat*> mFloatTexPool;
         std::vector<GLint*> mIntVertPool;
+        std::vector<GLshort*> mShortVertPool;
         std::vector<GLint*> mIntTexPool;
 };
 #endif
@@ -203,4 +213,8 @@ class GraphicsVertexes final
 #endif
 };
 
+#ifdef USE_OPENGL
+extern unsigned int vertexBufSize;
+#endif
+
 #endif // GRAPHICSVERTEXES_H
diff --git a/src/gui/setup_video.cpp b/src/gui/setup_video.cpp
index f722dbae8..9eaf5be56 100644
--- a/src/gui/setup_video.cpp
+++ b/src/gui/setup_video.cpp
@@ -193,11 +193,12 @@ int ModeListModel::getIndexOf(const std::string &widthXHeightMode)
     return -1;
 }
 
-const char *OPENGL_NAME[3] =
+const char *OPENGL_NAME[4] =
 {
     N_("Software"),
     N_("Fast OpenGL"),
     N_("Safe OpenGL"),
+    N_("Mobile OpenGL"),
 };
 
 class OpenGLListModel final : public gcn::ListModel
@@ -207,7 +208,7 @@ public:
     { }
 
     virtual int getNumberOfElements()
-    { return 3; }
+    { return 4; }
 
     virtual std::string getElementAt(int i)
     {
@@ -566,7 +567,7 @@ void Setup_Video::action(const gcn::ActionEvent &event)
         if (test)
         {
             const int val = test->getConfig().getValueInt("opengl", -1);
-            if (val >= 0 && val <= 2)
+            if (val >= 0 && val <= 3)
                 mOpenGLDropDown->setSelected(val);
             delete test;
         }
diff --git a/src/mobileopenglgraphics.cpp b/src/mobileopenglgraphics.cpp
new file mode 100644
index 000000000..1cc1fae8a
--- /dev/null
+++ b/src/mobileopenglgraphics.cpp
@@ -0,0 +1,1180 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2004-2009  The Mana World Development Team
+ *  Copyright (C) 2009-2010  The Mana Developers
+ *  Copyright (C) 2011-2012  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 "main.h"
+
+#ifdef USE_OPENGL
+
+#include "mobileopenglgraphics.h"
+
+#include "configuration.h"
+#include "graphicsmanager.h"
+#include "graphicsvertexes.h"
+#include "logger.h"
+
+#include "resources/image.h"
+#include "resources/openglimagehelper.h"
+
+#include "utils/stringutils.h"
+
+#include <SDL.h>
+
+#include "debug.h"
+
+GLuint MobileOpenGLGraphics::mLastImage = 0;
+
+//unsigned int vertexBufSize = 500;
+
+MobileOpenGLGraphics::MobileOpenGLGraphics():
+    mFloatTexArray(nullptr),
+    mIntTexArray(nullptr),
+    mIntVertArray(nullptr),
+    mShortVertArray(nullptr),
+    mAlpha(false),
+    mTexture(false),
+    mIsByteColor(false),
+    mFloatColor(1.0f),
+    mMaxVertices(500),
+#ifdef DEBUG_BIND_TEXTURE
+    mColorAlpha(false),
+    mOldTextureId(0)
+#else
+    mColorAlpha(false)
+#endif
+{
+    mOpenGL = 3;
+    mName = "mobile OpenGL";
+}
+
+MobileOpenGLGraphics::~MobileOpenGLGraphics()
+{
+    delete [] mFloatTexArray;
+    delete [] mIntTexArray;
+    delete [] mIntVertArray;
+    delete [] mShortVertArray;
+}
+
+void MobileOpenGLGraphics::initArrays()
+{
+    mMaxVertices = graphicsManager.getMaxVertices();
+    if (mMaxVertices < 500)
+        mMaxVertices = 500;
+    else if (mMaxVertices > 1024)
+        mMaxVertices = 1024;
+
+    // need alocate small size, after if limit reached reallocate to double size
+    vertexBufSize = mMaxVertices;
+    mFloatTexArray = new GLfloat[mMaxVertices * 4 + 30];
+    mIntTexArray = new GLint[mMaxVertices * 4 + 30];
+    mIntVertArray = new GLint[mMaxVertices * 4 + 30];
+    mShortVertArray = new GLshort[mMaxVertices * 4 + 30];
+}
+
+bool MobileOpenGLGraphics::setVideoMode(const int w, const int h,
+                                        const int bpp, const bool fs,
+                                        const bool hwaccel, const bool resize,
+                                        const bool noFrame)
+{
+    setMainFlags(w, h, bpp, fs, hwaccel, resize, noFrame);
+
+    return setOpenGLMode();
+}
+
+static inline void drawQuad(const Image *image,
+                            int srcX, int srcY, int dstX, int dstY,
+                            int width, int height)
+{
+//    if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D)
+    {
+        // Find OpenGL normalized texture coordinates.
+        const float texX1 = static_cast<float>(srcX) /
+                            static_cast<float>(image->mTexWidth);
+        const float texY1 = static_cast<float>(srcY) /
+                            static_cast<float>(image->mTexHeight);
+        const float texX2 = static_cast<float>(srcX + width) /
+                            static_cast<float>(image->mTexWidth);
+        const float texY2 = static_cast<float>(srcY + height) /
+                            static_cast<float>(image->mTexHeight);
+
+        GLfloat tex[] =
+        {
+            texX1, texY1,
+            texX2, texY1,
+            texX1, texY2,
+            texX2, texY2
+        };
+
+        GLshort vert[] =
+        {
+            static_cast<GLshort>(dstX), static_cast<GLshort>(dstY),
+            static_cast<GLshort>(dstX + width), static_cast<GLshort>(dstY),
+            static_cast<GLshort>(dstX), static_cast<GLshort>(dstY + height),
+            static_cast<GLshort>(dstX + width),
+                static_cast<GLshort>(dstY + height)
+        };
+
+        glVertexPointer(2, GL_SHORT, 0, &vert);
+        glTexCoordPointer(2, GL_FLOAT, 0, &tex);
+
+        glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+    }
+}
+
+static inline void drawRescaledQuad(const Image *const image,
+                                    int srcX, int srcY, int dstX, int dstY,
+                                    int width, int height,
+                                    int desiredWidth, int desiredHeight)
+{
+//    if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D)
+    {
+        // Find OpenGL normalized texture coordinates.
+        const float texX1 = static_cast<float>(srcX) /
+                            static_cast<float>(image->mTexWidth);
+        const float texY1 = static_cast<float>(srcY) /
+                            static_cast<float>(image->mTexHeight);
+        const float texX2 = static_cast<float>(srcX + width) /
+                            static_cast<float>(image->mTexWidth);
+        const float texY2 = static_cast<float>(srcY + height) /
+                            static_cast<float>(image->mTexHeight);
+
+        GLfloat tex[] =
+        {
+            texX1, texY1,
+            texX2, texY1,
+            texX1, texY2,
+            texX2, texY2
+        };
+
+        GLshort vert[] =
+        {
+            static_cast<GLshort>(dstX), static_cast<GLshort>(dstY),
+            static_cast<GLshort>(dstX + desiredWidth),
+                static_cast<GLshort>(dstY),
+            static_cast<GLshort>(dstX), static_cast<GLshort>(
+                dstY + desiredHeight),
+            static_cast<GLshort>(dstX + desiredWidth),
+                static_cast<GLshort>(dstY + desiredHeight)
+        };
+        glVertexPointer(2, GL_SHORT, 0, &vert);
+        glTexCoordPointer(2, GL_FLOAT, 0, &tex);
+
+        glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+    }
+}
+
+
+bool MobileOpenGLGraphics::drawImage2(const Image *const image,
+                                      int srcX, int srcY,
+                                      int dstX, int dstY,
+                                      const int width, const int height,
+                                      const bool useColor)
+{
+    if (!image)
+        return false;
+
+    srcX += image->mBounds.x;
+    srcY += image->mBounds.y;
+
+    if (!useColor)
+        setColorAlpha(image->mAlpha);
+
+#ifdef DEBUG_BIND_TEXTURE
+    debugBindTexture(image);
+#endif
+    bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
+
+    setTexturingAndBlending(true);
+
+    drawQuad(image, srcX, srcY, dstX, dstY, width, height);
+
+    return true;
+}
+
+bool MobileOpenGLGraphics::drawRescaledImage(Image *const image, int srcX,
+                                             int srcY, int dstX, int dstY,
+                                             const int width, const int height,
+                                             const int desiredWidth,
+                                             const int desiredHeight,
+                                             const bool useColor)
+{
+    return drawRescaledImage(image, srcX, srcY,
+                             dstX, dstY,
+                             width, height,
+                             desiredWidth, desiredHeight,
+                             useColor, true);
+}
+
+bool MobileOpenGLGraphics::drawRescaledImage(Image *const image, int srcX,
+                                             int srcY, int dstX, int dstY,
+                                             const int width, const int height,
+                                             const int desiredWidth,
+                                             const int desiredHeight,
+                                             const bool useColor,
+                                             bool smooth)
+{
+    if (!image)
+        return false;
+
+    // Just draw the image normally when no resizing is necessary,
+    if (width == desiredWidth && height == desiredHeight)
+    {
+        return drawImage2(image, srcX, srcY, dstX, dstY,
+                          width, height, useColor);
+    }
+
+    // When the desired image is smaller than the current one,
+    // disable smooth effect.
+    if (width > desiredWidth && height > desiredHeight)
+        smooth = false;
+
+    srcX += image->mBounds.x;
+    srcY += image->mBounds.y;
+
+    if (!useColor)
+        setColorAlpha(image->mAlpha);
+
+#ifdef DEBUG_BIND_TEXTURE
+    debugBindTexture(image);
+#endif
+    bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
+
+    setTexturingAndBlending(true);
+
+    // Draw a textured quad.
+    drawRescaledQuad(image, srcX, srcY, dstX, dstY, width, height,
+                     desiredWidth, desiredHeight);
+
+    if (smooth) // A basic smooth effect...
+    {
+        setColorAlpha(0.2f);
+        drawRescaledQuad(image, srcX, srcY, dstX - 1, dstY - 1, width, height,
+                         desiredWidth + 1, desiredHeight + 1);
+        drawRescaledQuad(image, srcX, srcY, dstX + 1, dstY + 1, width, height,
+                         desiredWidth - 1, desiredHeight - 1);
+
+        drawRescaledQuad(image, srcX, srcY, dstX + 1, dstY, width, height,
+                         desiredWidth - 1, desiredHeight);
+        drawRescaledQuad(image, srcX, srcY, dstX, dstY + 1, width, height,
+                         desiredWidth, desiredHeight - 1);
+    }
+
+    return true;
+}
+
+void MobileOpenGLGraphics::drawImagePattern(const Image *const image,
+                                            const int x, const int y,
+                                            const int w, const int h)
+{
+    if (!image)
+        return;
+
+    const int srcX = image->mBounds.x;
+    const int srcY = image->mBounds.y;
+
+    const int iw = image->mBounds.w;
+    const int ih = image->mBounds.h;
+
+    if (iw == 0 || ih == 0)
+        return;
+
+    const float tw = static_cast<float>(image->mTexWidth);
+    const float th = static_cast<float>(image->mTexHeight);
+
+    setColorAlpha(image->mAlpha);
+
+#ifdef DEBUG_BIND_TEXTURE
+    debugBindTexture(image);
+#endif
+    bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
+
+    setTexturingAndBlending(true);
+
+    unsigned int vp = 0;
+    const unsigned int vLimit = mMaxVertices * 4;
+    // Draw a set of textured rectangles
+//    if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D)
+    {
+        float texX1 = static_cast<float>(srcX) / tw;
+        float texY1 = static_cast<float>(srcY) / th;
+
+        for (int py = 0; py < h; py += ih)
+        {
+            const int height = (py + ih >= h) ? h - py : ih;
+            const int dstY = y + py;
+            for (int px = 0; px < w; px += iw)
+            {
+                int width = (px + iw >= w) ? w - px : iw;
+                int dstX = x + px;
+
+                float texX2 = static_cast<float>(srcX + width) / tw;
+                float texY2 = static_cast<float>(srcY + height) / th;
+
+                mFloatTexArray[vp + 0] = texX1;     //1
+                mFloatTexArray[vp + 1] = texY1;
+
+                mFloatTexArray[vp + 2] = texX2;     //2
+                mFloatTexArray[vp + 3] = texY1;
+
+                mFloatTexArray[vp + 4] = texX2;     //3
+                mFloatTexArray[vp + 5] = texY2;
+
+                mFloatTexArray[vp + 6] = texX1;     //1
+                mFloatTexArray[vp + 7] = texY1;
+
+                mFloatTexArray[vp + 8] = texX1;     //4
+                mFloatTexArray[vp + 9] = texY2;
+
+                mFloatTexArray[vp + 10] = texX2;     //3
+                mFloatTexArray[vp + 11] = texY2;
+
+                mShortVertArray[vp + 0] = dstX;
+                mShortVertArray[vp + 1] = dstY;
+
+                mShortVertArray[vp + 2] = dstX + width;
+                mShortVertArray[vp + 3] = dstY;
+
+                mShortVertArray[vp + 4] = dstX + width;
+                mShortVertArray[vp + 5] = dstY + height;
+
+                mShortVertArray[vp + 6] = dstX;
+                mShortVertArray[vp + 7] = dstY;
+
+                mShortVertArray[vp + 8] = dstX;
+                mShortVertArray[vp + 9] = dstY + height;
+
+                mShortVertArray[vp + 10] = dstX + width;
+                mShortVertArray[vp + 11] = dstY + height;
+
+                vp += 12;
+                if (vp >= vLimit)
+                {
+                    drawTriangleArrayfs(vp);
+                    vp = 0;
+                }
+            }
+        }
+        if (vp > 0)
+            drawTriangleArrayfs(vp);
+    }
+}
+
+void MobileOpenGLGraphics::drawRescaledImagePattern(const Image *const image,
+                                                    const int x, const int y,
+                                                    const int w, const int h,
+                                                    const int scaledWidth,
+                                                    const int scaledHeight)
+{
+    if (!image)
+        return;
+
+    if (scaledWidth == 0 || scaledHeight == 0)
+        return;
+
+    const int srcX = image->mBounds.x;
+    const int srcY = image->mBounds.y;
+
+    const int iw = image->getWidth();
+    const int ih = image->getHeight();
+    if (iw == 0 || ih == 0)
+        return;
+
+    setColorAlpha(image->mAlpha);
+
+#ifdef DEBUG_BIND_TEXTURE
+    debugBindTexture(image);
+#endif
+    bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
+
+    setTexturingAndBlending(true);
+
+    unsigned int vp = 0;
+    const unsigned int vLimit = mMaxVertices * 4;
+
+    // Draw a set of textured rectangles
+//    if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D)
+    {
+        const float tw = static_cast<float>(image->mTexWidth);
+        const float th = static_cast<float>(image->mTexHeight);
+
+        const float texX1 = static_cast<float>(srcX) / tw;
+        const float texY1 = static_cast<float>(srcY) / th;
+
+        const float tFractionW = iw / tw;
+        const float tFractionH = ih / th;
+
+        for (int py = 0; py < h; py += scaledHeight)
+        {
+            const int height = (py + scaledHeight >= h)
+                ? h - py : scaledHeight;
+            const int dstY = y + py;
+            for (int px = 0; px < w; px += scaledWidth)
+            {
+                int width = (px + scaledWidth >= w) ? w - px : scaledWidth;
+                int dstX = x + px;
+                const float visibleFractionW = static_cast<float>(width)
+                    / scaledWidth;
+                const float visibleFractionH = static_cast<float>(height)
+                    / scaledHeight;
+
+                const float texX2 = texX1 + tFractionW * visibleFractionW;
+                const float texY2 = texY1 + tFractionH * visibleFractionH;
+
+                mFloatTexArray[vp + 0] = texX1;
+                mFloatTexArray[vp + 1] = texY1;
+
+                mFloatTexArray[vp + 2] = texX2;
+                mFloatTexArray[vp + 3] = texY1;
+
+                mFloatTexArray[vp + 4] = texX2;
+                mFloatTexArray[vp + 5] = texY2;
+
+                mFloatTexArray[vp + 6] = texX1;
+                mFloatTexArray[vp + 7] = texY1;
+
+                mFloatTexArray[vp + 8] = texX1;
+                mFloatTexArray[vp + 9] = texY2;
+
+                mFloatTexArray[vp + 10] = texX2;
+                mFloatTexArray[vp + 11] = texY2;
+
+
+                mShortVertArray[vp + 0] = dstX;
+                mShortVertArray[vp + 1] = dstY;
+
+                mShortVertArray[vp + 2] = dstX + width;
+                mShortVertArray[vp + 3] = dstY;
+
+                mShortVertArray[vp + 4] = dstX + width;
+                mShortVertArray[vp + 5] = dstY + height;
+
+                mShortVertArray[vp + 6] = dstX;
+                mShortVertArray[vp + 7] = dstY;
+
+                mShortVertArray[vp + 8] = dstX;
+                mShortVertArray[vp + 9] = dstY + height;
+
+                mShortVertArray[vp + 10] = dstX + width;
+                mShortVertArray[vp + 11] = dstY + height;
+
+                vp += 12;
+                if (vp >= vLimit)
+                {
+                    drawTriangleArrayfs(vp);
+                    vp = 0;
+                }
+            }
+        }
+        if (vp > 0)
+            drawTriangleArrayfs(vp);
+    }
+}
+
+void MobileOpenGLGraphics::drawImagePattern2(GraphicsVertexes *const vert,
+                                             const Image *const image)
+{
+    if (!image)
+        return;
+
+    setColorAlpha(image->mAlpha);
+#ifdef DEBUG_BIND_TEXTURE
+    debugBindTexture(image);
+#endif
+    bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
+    setTexturingAndBlending(true);
+
+    drawVertexes(vert->getOGL());
+}
+
+inline void MobileOpenGLGraphics::drawVertexes(NormalOpenGLGraphicsVertexes
+                                               &ogl)
+{
+    std::vector<GLshort*> &shortVertPool = ogl.mShortVertPool;
+    std::vector<GLshort*>::const_iterator iv;
+    std::vector<GLshort*>::const_iterator iv_end = shortVertPool.end();
+    std::vector<int> &vp = ogl.mVp;
+    std::vector<int>::const_iterator ivp;
+    std::vector<int>::const_iterator ivp_end = vp.end();
+
+    // Draw a set of textured rectangles
+//    if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D)
+    {
+        std::vector<GLfloat*> &floatTexPool = ogl.mFloatTexPool;
+        std::vector<GLfloat*>::const_iterator ft;
+        std::vector<GLfloat*>::const_iterator ft_end = floatTexPool.end();
+
+        for (iv = shortVertPool.begin(), ft = floatTexPool.begin(),
+             ivp = vp.begin();
+             iv != iv_end, ft != ft_end,
+             ivp != ivp_end;
+             ++ iv, ++ ft, ++ ivp)
+        {
+            drawTriangleArrayfs(*iv, *ft, *ivp);
+        }
+    }
+}
+
+void MobileOpenGLGraphics::calcImagePattern(GraphicsVertexes *const vert,
+                                            const Image *const image,
+                                            const int x, const int y,
+                                            const int w, const int h)
+{
+    if (!image)
+    {
+        vert->incPtr(1);
+        return;
+    }
+
+    const int srcX = image->mBounds.x;
+    const int srcY = image->mBounds.y;
+
+    const int iw = image->mBounds.w;
+    const int ih = image->mBounds.h;
+
+    if (iw == 0 || ih == 0)
+    {
+        vert->incPtr(1);
+        return;
+    }
+
+    const float tw = static_cast<float>(image->mTexWidth);
+    const float th = static_cast<float>(image->mTexHeight);
+
+    unsigned int vp = 0;
+    const unsigned int vLimit = mMaxVertices * 4;
+
+    NormalOpenGLGraphicsVertexes &ogl = vert->getOGL();
+    ogl.init();
+
+    // Draw a set of textured rectangles
+//    if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D)
+    {
+        float texX1 = static_cast<float>(srcX) / tw;
+        float texY1 = static_cast<float>(srcY) / th;
+
+        GLfloat *floatTexArray = ogl.switchFloatTexArray();
+        GLshort *shortVertArray = ogl.switchShortVertArray();
+
+        for (int py = 0; py < h; py += ih)
+        {
+            const int height = (py + ih >= h) ? h - py : ih;
+            const int dstY = y + py;
+            for (int px = 0; px < w; px += iw)
+            {
+                int width = (px + iw >= w) ? w - px : iw;
+                int dstX = x + px;
+
+                float texX2 = static_cast<float>(srcX + width) / tw;
+                float texY2 = static_cast<float>(srcY + height) / th;
+
+                floatTexArray[vp + 0] = texX1;
+                floatTexArray[vp + 1] = texY1;
+
+                floatTexArray[vp + 2] = texX2;
+                floatTexArray[vp + 3] = texY1;
+
+                floatTexArray[vp + 4] = texX2;
+                floatTexArray[vp + 5] = texY2;
+
+                floatTexArray[vp + 6] = texX1;
+                floatTexArray[vp + 7] = texY1;
+
+                floatTexArray[vp + 8] = texX1;
+                floatTexArray[vp + 9] = texY2;
+
+                floatTexArray[vp + 10] = texX2;
+                floatTexArray[vp + 11] = texY2;
+
+
+                shortVertArray[vp + 0] = dstX;
+                shortVertArray[vp + 1] = dstY;
+
+                shortVertArray[vp + 2] = dstX + width;
+                shortVertArray[vp + 3] = dstY;
+
+                shortVertArray[vp + 4] = dstX + width;
+                shortVertArray[vp + 5] = dstY + height;
+
+                shortVertArray[vp + 6] = dstX;
+                shortVertArray[vp + 7] = dstY;
+
+                shortVertArray[vp + 8] = dstX;
+                shortVertArray[vp + 9] = dstY + height;
+
+                shortVertArray[vp + 10] = dstX + width;
+                shortVertArray[vp + 11] = dstY + height;
+
+                vp += 12;
+                if (vp >= vLimit)
+                {
+                    floatTexArray = ogl.switchFloatTexArray();
+                    shortVertArray = ogl.switchShortVertArray();
+                    ogl.switchVp(vp);
+                    vp = 0;
+                }
+            }
+        }
+    }
+    ogl.switchVp(vp);
+    vert->incPtr(1);
+}
+
+void MobileOpenGLGraphics::calcTile(ImageVertexes *const vert,
+                                    const Image *const image,
+                                    int dstX, int dstY)
+{
+    if (!vert || !image)
+        return;
+
+    const int srcX = image->mBounds.x;
+    const int srcY = image->mBounds.y;
+
+    const int w = image->mBounds.w;
+    const int h = image->mBounds.h;
+
+    if (w == 0 || h == 0)
+        return;
+
+    const float tw = static_cast<float>(image->mTexWidth);
+    const float th = static_cast<float>(image->mTexHeight);
+
+    const unsigned int vLimit = mMaxVertices * 4;
+
+    NormalOpenGLGraphicsVertexes &ogl = vert->ogl;
+
+//    std::vector<int> *vps = ogl.getVp();
+    unsigned int vp = ogl.continueVp();
+
+    // Draw a set of textured rectangles
+//    if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D)
+    {
+        float texX1 = static_cast<float>(srcX) / tw;
+        float texY1 = static_cast<float>(srcY) / th;
+
+        float texX2 = static_cast<float>(srcX + w) / tw;
+        float texY2 = static_cast<float>(srcY + h) / th;
+
+        GLfloat *floatTexArray = ogl.continueFloatTexArray();
+        GLshort *shortVertArray = ogl.continueShortVertArray();
+
+        floatTexArray[vp + 0] = texX1;
+        floatTexArray[vp + 1] = texY1;
+
+        floatTexArray[vp + 2] = texX2;
+        floatTexArray[vp + 3] = texY1;
+
+        floatTexArray[vp + 4] = texX2;
+        floatTexArray[vp + 5] = texY2;
+
+        floatTexArray[vp + 6] = texX1;
+        floatTexArray[vp + 7] = texY1;
+
+        floatTexArray[vp + 8] = texX1;
+        floatTexArray[vp + 9] = texY2;
+
+        floatTexArray[vp + 10] = texX2;
+        floatTexArray[vp + 11] = texY2;
+
+        shortVertArray[vp + 0] = dstX;
+        shortVertArray[vp + 1] = dstY;
+
+        shortVertArray[vp + 2] = dstX + w;
+        shortVertArray[vp + 3] = dstY;
+
+        shortVertArray[vp + 4] = dstX + w;
+        shortVertArray[vp + 5] = dstY + h;
+
+        shortVertArray[vp + 6] = dstX;
+        shortVertArray[vp + 7] = dstY;
+
+        shortVertArray[vp + 8] = dstX;
+        shortVertArray[vp + 9] = dstY + h;
+
+        shortVertArray[vp + 10] = dstX + w;
+        shortVertArray[vp + 11] = dstY + h;
+
+        vp += 12;
+        if (vp >= vLimit)
+        {
+            ogl.switchFloatTexArray();
+            ogl.switchShortVertArray();
+            ogl.switchVp(vp);
+            vp = 0;
+        }
+    }
+    ogl.switchVp(vp);
+}
+
+void MobileOpenGLGraphics::drawTile(ImageVertexes *const vert)
+{
+    if (!vert)
+        return;
+    Image *image = vert->image;
+
+    setColorAlpha(image->mAlpha);
+#ifdef DEBUG_BIND_TEXTURE
+    debugBindTexture(image);
+#endif
+    bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
+    setTexturingAndBlending(true);
+    drawVertexes(vert->ogl);
+}
+
+void MobileOpenGLGraphics::updateScreen()
+{
+//    glFlush();
+//    glFinish();
+    SDL_GL_SwapBuffers();
+// may be need clear?
+//    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+}
+
+void MobileOpenGLGraphics::_beginDraw()
+{
+    glMatrixMode(GL_TEXTURE);
+    glLoadIdentity();
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+
+#ifdef ANDROID
+    glOrthof(0.0, static_cast<float>(mTarget->w),
+        static_cast<float>(mTarget->h), 0.0, -1.0, 1.0);
+#else
+    glOrtho(0.0, static_cast<double>(mTarget->w),
+        static_cast<double>(mTarget->h), 0.0, -1.0, 1.0);
+#endif
+
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+
+    glEnable(GL_SCISSOR_TEST);
+    glDisable(GL_DITHER);
+
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+    glEnableClientState(GL_VERTEX_ARRAY);
+    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+
+#ifndef ANDROID
+    glHint(GL_LINE_SMOOTH_HINT, GL_FASTEST);
+    glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
+    glHint(GL_POINT_SMOOTH_HINT, GL_FASTEST);
+    glHint(GL_POLYGON_SMOOTH_HINT, GL_FASTEST);
+#ifndef __MINGW32__
+    glHint(GL_TEXTURE_COMPRESSION_HINT, GL_FASTEST);
+#endif
+#endif
+
+//    glScalef(0.5f, 0.5f, 0.5f);
+
+    pushClipArea(gcn::Rectangle(0, 0, mTarget->w, mTarget->h));
+}
+
+void MobileOpenGLGraphics::_endDraw()
+{
+    popClipArea();
+}
+
+void MobileOpenGLGraphics::prepareScreenshot()
+{
+    if (config.getBoolValue("usefbo"))
+        graphicsManager.createFBO(mTarget->w, mTarget->h, &mFbo);
+}
+
+SDL_Surface* MobileOpenGLGraphics::getScreenshot()
+{
+    const int h = mTarget->h;
+    const int w = mTarget->w - (mTarget->w % 4);
+    GLint pack = 1;
+
+    SDL_Surface *screenshot = SDL_CreateRGBSurface(
+            SDL_SWSURFACE,
+            w, h, 24,
+            0xff0000, 0x00ff00, 0x0000ff, 0x000000);
+
+    if (!screenshot)
+        return nullptr;
+
+    if (SDL_MUSTLOCK(screenshot))
+        SDL_LockSurface(screenshot);
+
+    // Grap the pixel buffer and write it to the SDL surface
+    glGetIntegerv(GL_PACK_ALIGNMENT, &pack);
+    glPixelStorei(GL_PACK_ALIGNMENT, 1);
+    glReadPixels(0, 0, w, h, GL_RGB, GL_UNSIGNED_BYTE, screenshot->pixels);
+
+    // Flip the screenshot, as OpenGL has 0,0 in bottom left
+    unsigned int lineSize = 3 * w;
+    GLubyte* buf = static_cast<GLubyte*>(malloc(lineSize));
+
+    for (int i = 0; i < (h / 2); i++)
+    {
+        GLubyte *top = static_cast<GLubyte*>(
+            screenshot->pixels) + lineSize * i;
+        GLubyte *bot = static_cast<GLubyte*>(
+            screenshot->pixels) + lineSize * (h - 1 - i);
+
+        memcpy(buf, top, lineSize);
+        memcpy(top, bot, lineSize);
+        memcpy(bot, buf, lineSize);
+    }
+
+    free(buf);
+
+    if (config.getBoolValue("usefbo"))
+        graphicsManager.deleteFBO(&mFbo);
+
+    glPixelStorei(GL_PACK_ALIGNMENT, pack);
+
+    if (SDL_MUSTLOCK(screenshot))
+        SDL_UnlockSurface(screenshot);
+
+    return screenshot;
+}
+
+bool MobileOpenGLGraphics::pushClipArea(gcn::Rectangle area)
+{
+    int transX = 0;
+    int transY = 0;
+
+    if (!mClipStack.empty())
+    {
+        const gcn::ClipRectangle &clipArea = mClipStack.top();
+        transX = -clipArea.xOffset;
+        transY = -clipArea.yOffset;
+    }
+
+    bool result = gcn::Graphics::pushClipArea(area);
+
+    const gcn::ClipRectangle &clipArea = mClipStack.top();
+    transX += clipArea.xOffset;
+    transY += clipArea.yOffset;
+
+    glPushMatrix();
+    if (transX || transY)
+    {
+        glTranslatef(static_cast<GLfloat>(transX),
+                     static_cast<GLfloat>(transY), 0);
+    }
+    glScissor(clipArea.x, mTarget->h - clipArea.y - clipArea.height,
+        clipArea.width, clipArea.height);
+
+    return result;
+}
+
+void MobileOpenGLGraphics::popClipArea()
+{
+    gcn::Graphics::popClipArea();
+
+    if (mClipStack.empty())
+        return;
+
+    glPopMatrix();
+    const gcn::ClipRectangle &clipArea = mClipStack.top();
+    glScissor(clipArea.x, mTarget->h - clipArea.y - clipArea.height,
+        clipArea.width, clipArea.height);
+}
+
+void MobileOpenGLGraphics::setColor(const gcn::Color& color)
+{
+    mColor = color;
+    mColorAlpha = (color.a != 255);
+}
+
+void MobileOpenGLGraphics::drawPoint(int x, int y)
+{
+    setTexturingAndBlending(false);
+    restoreColor();
+
+#ifdef ANDROID
+    // TODO need fix
+#else
+    glBegin(GL_POINTS);
+    glVertex2i(x, y);
+    glEnd();
+#endif
+}
+
+void MobileOpenGLGraphics::drawLine(int x1, int y1, int x2, int y2)
+{
+    setTexturingAndBlending(false);
+    restoreColor();
+
+    mShortVertArray[0] = static_cast<GLshort>(x1);
+    mShortVertArray[1] = static_cast<GLshort>(y1);
+    mShortVertArray[2] = static_cast<GLshort>(x2);
+    mShortVertArray[3] = static_cast<GLshort>(y2);
+
+    drawLineArrays(4);
+}
+
+void MobileOpenGLGraphics::drawRectangle(const gcn::Rectangle& rect)
+{
+    drawRectangle(rect, false);
+}
+
+void MobileOpenGLGraphics::fillRectangle(const gcn::Rectangle& rect)
+{
+    drawRectangle(rect, true);
+}
+
+void MobileOpenGLGraphics::setTargetPlane(int width A_UNUSED,
+                                          int height A_UNUSED)
+{
+}
+
+void MobileOpenGLGraphics::setTexturingAndBlending(bool enable)
+{
+    if (enable)
+    {
+        if (!mTexture)
+        {
+            glEnable(OpenGLImageHelper::mTextureType);
+            glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+            mTexture = true;
+        }
+
+        if (!mAlpha)
+        {
+            glEnable(GL_BLEND);
+            mAlpha = true;
+        }
+    }
+    else
+    {
+        mLastImage = 0;
+        if (mAlpha && !mColorAlpha)
+        {
+            glDisable(GL_BLEND);
+            mAlpha = false;
+        }
+        else if (!mAlpha && mColorAlpha)
+        {
+            glEnable(GL_BLEND);
+            mAlpha = true;
+        }
+
+        if (mTexture)
+        {
+            glDisable(OpenGLImageHelper::mTextureType);
+            glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+            mTexture = false;
+        }
+    }
+}
+
+void MobileOpenGLGraphics::drawRectangle(const gcn::Rectangle& rect,
+                                         bool filled)
+{
+    setTexturingAndBlending(false);
+    restoreColor();
+
+    const GLshort x = static_cast<GLshort>(rect.x);
+    const GLshort y = static_cast<GLshort>(rect.y);
+    const GLshort width = static_cast<GLshort>(rect.width);
+    const GLshort height = static_cast<GLshort>(rect.height);
+    const GLshort xw = static_cast<GLshort>(rect.x + width);
+    const GLshort yh = static_cast<GLshort>(rect.y + height);
+
+    if (filled)
+    {
+        GLshort vert[] =
+        {
+            x, y,
+            xw, y,
+            x, yh,
+            xw, yh
+        };
+
+        glVertexPointer(2, GL_SHORT, 0, &vert);
+        glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+    }
+    else
+    {
+        GLshort vert[] =
+        {
+            x, y,
+            xw, y,
+            xw, yh,
+            x, yh
+        };
+
+        glVertexPointer(2, GL_SHORT, 0, &vert);
+        glDrawArrays(GL_LINE_LOOP, 0, 4);
+    }
+}
+
+bool MobileOpenGLGraphics::drawNet(const int x1, const int y1,
+                                   const int x2, const int y2,
+                                   const int width, const int height)
+{
+    unsigned int vp = 0;
+    const unsigned int vLimit = mMaxVertices * 4;
+
+    setTexturingAndBlending(false);
+    restoreColor();
+
+    const GLshort xs1 = static_cast<GLshort>(x1);
+    const GLshort xs2 = static_cast<GLshort>(x2);
+    const GLshort ys1 = static_cast<GLshort>(y1);
+    const GLshort ys2 = static_cast<GLshort>(y2);
+
+    for (short y = y1; y < y2; y += height)
+    {
+        mShortVertArray[vp + 0] = xs1;
+        mShortVertArray[vp + 1] = y;
+
+        mShortVertArray[vp + 2] = xs2;
+        mShortVertArray[vp + 3] = y;
+
+        vp += 4;
+        if (vp >= vLimit)
+        {
+            drawLineArrays(vp);
+            vp = 0;
+        }
+    }
+
+    for (short x = x1; x < x2; x += width)
+    {
+        mShortVertArray[vp + 0] = x;
+        mShortVertArray[vp + 1] = ys1;
+
+        mShortVertArray[vp + 2] = x;
+        mShortVertArray[vp + 3] = ys2;
+
+        vp += 4;
+        if (vp >= vLimit)
+        {
+            drawLineArrays(vp);
+            vp = 0;
+        }
+    }
+
+    if (vp > 0)
+        drawLineArrays(vp);
+
+    return true;
+}
+
+void MobileOpenGLGraphics::bindTexture(GLenum target, GLuint texture)
+{
+    if (mLastImage != texture)
+    {
+        mLastImage = texture;
+        glBindTexture(target, texture);
+    }
+}
+
+inline void MobileOpenGLGraphics::drawTriangleArrayfs(int size)
+{
+    glVertexPointer(2, GL_SHORT, 0, mShortVertArray);
+    glTexCoordPointer(2, GL_FLOAT, 0, mFloatTexArray);
+
+    glDrawArrays(GL_TRIANGLES, 0, size / 2);
+}
+
+inline void MobileOpenGLGraphics::drawTriangleArrayfs(GLshort *const
+                                                      shortVertArray,
+                                                      GLfloat *const
+                                                      floatTexArray,
+                                                      const int size)
+{
+    glVertexPointer(2, GL_SHORT, 0, shortVertArray);
+    glTexCoordPointer(2, GL_FLOAT, 0, floatTexArray);
+
+    glDrawArrays(GL_TRIANGLES, 0, size / 2);
+}
+
+inline void MobileOpenGLGraphics::drawLineArrays(int size)
+{
+    glVertexPointer(2, GL_SHORT, 0, mShortVertArray);
+
+    glDrawArrays(GL_LINES, 0, size / 2);
+}
+
+void MobileOpenGLGraphics::dumpSettings()
+{
+    GLint test[1000];
+    logger->log("\n\n");
+    logger->log("start opengl dump");
+    for (int f = 0; f < 65535; f ++)
+    {
+        test[0] = 0;
+        test[1] = 0;
+        test[2] = 0;
+        test[3] = 0;
+        glGetIntegerv(f, &test[0]);
+        if (test[0] || test[1] || test[2] || test[3])
+        {
+            logger->log("\n%d = %d, %d, %d, %d", f,
+                test[0], test[1], test[2], test[3]);
+        }
+    }
+}
+
+void MobileOpenGLGraphics::setColorAlpha(const float alpha)
+{
+    if (!mIsByteColor && mFloatColor == alpha)
+        return;
+
+    glColor4f(1.0f, 1.0f, 1.0f, alpha);
+    mIsByteColor = false;
+    mFloatColor = alpha;
+}
+
+void MobileOpenGLGraphics::restoreColor()
+{
+    if (mIsByteColor && mByteColor == mColor)
+        return;
+
+    glColor4ub(static_cast<GLubyte>(mColor.r),
+               static_cast<GLubyte>(mColor.g),
+               static_cast<GLubyte>(mColor.b),
+               static_cast<GLubyte>(mColor.a));
+    mIsByteColor = true;
+    mByteColor = mColor;
+}
+
+#ifdef DEBUG_BIND_TEXTURE
+void MobileOpenGLGraphics::debugBindTexture(const Image *image)
+{
+    const std::string texture = image->getIdPath();
+    if (mOldTexture != texture)
+    {
+        if ((!mOldTexture.empty() || !texture.empty())
+            && mOldTextureId != image->mGLImage)
+        {
+            logger->log("bind: %s (%d) to %s (%d)", mOldTexture.c_str(),
+                mOldTextureId, texture.c_str(), image->mGLImage);
+        }
+        mOldTextureId = image->mGLImage;
+        mOldTexture = texture;
+    }
+}
+#else
+void MobileOpenGLGraphics::debugBindTexture(const Image *image A_UNUSED)
+{
+}
+#endif
+
+#endif // USE_OPENGL
diff --git a/src/mobileopenglgraphics.h b/src/mobileopenglgraphics.h
new file mode 100644
index 000000000..350c21a59
--- /dev/null
+++ b/src/mobileopenglgraphics.h
@@ -0,0 +1,204 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2004-2009  The Mana World Development Team
+ *  Copyright (C) 2009-2010  The Mana Developers
+ *  Copyright (C) 2011-2012  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 MOBILEOPENGLGRAPHICS_H
+#define MOBILEOPENGLGRAPHICS_H
+
+#include "main.h"
+#ifdef USE_OPENGL
+
+#include "localconsts.h"
+#include "graphics.h"
+
+#include "resources/fboinfo.h"
+
+#ifdef ANDROID
+#include <GLES/gl.h>
+#include <GLES/glext.h>
+#include <GLES2/gl2.h>
+#else
+#define GL_GLEXT_PROTOTYPES 1
+#include <SDL_opengl.h>
+#include <GL/glext.h>
+#endif
+
+#include <set>
+
+class NormalOpenGLGraphicsVertexes;
+
+class MobileOpenGLGraphics final : public Graphics
+{
+    public:
+        MobileOpenGLGraphics();
+
+        A_DELETE_COPY(MobileOpenGLGraphics)
+
+        ~MobileOpenGLGraphics();
+
+        bool setVideoMode(const int w, const int h, const int bpp,
+                          const bool fs, const bool hwaccel,
+                          const bool resize, const bool noFrame) override;
+
+
+        /**
+         * Draws a resclaled version of the image
+         */
+        bool drawRescaledImage(Image *const image, int srcX, int srcY,
+                               int dstX, int dstY,
+                               const int width, const int height,
+                               const int desiredWidth, const int desiredHeight,
+                               const bool useColor) override;
+
+        /**
+         * Used to get the smooth rescale option over the standard function.
+         */
+        bool drawRescaledImage(Image *const image, int srcX, int srcY,
+                               int dstX, int dstY,
+                               const int width, const int height,
+                               const int desiredWidth, const int desiredHeight,
+                               const bool useColor, bool smooth);
+
+        void drawImagePattern(const Image *const image,
+                              const int x, const int y,
+                              const int w, const int h) override;
+
+        /**
+         * Draw a pattern based on a rescaled version of the given image...
+         */
+        void drawRescaledImagePattern(const Image *const image,
+                                      const int x, const int y,
+                                      const int w, const int h,
+                                      const int scaledWidth,
+                                      const int scaledHeight) override;
+
+        void calcImagePattern(GraphicsVertexes *const vert,
+                              const Image *const image,
+                              const int x, const int y,
+                              const int w, const int h) override;
+
+        void calcTile(ImageVertexes *const vert, const Image *const image,
+                      int x, int y) override;
+
+        void drawTile(ImageVertexes *const vert) override;
+
+        void drawImagePattern2(GraphicsVertexes *const vert,
+                               const Image *const image) override;
+
+        void updateScreen() override;
+
+        void _beginDraw();
+
+        void _endDraw();
+
+        bool pushClipArea(gcn::Rectangle area);
+
+        void popClipArea();
+
+        void setColor(const gcn::Color &color);
+
+        void drawPoint(int x, int y);
+
+        void drawLine(int x1, int y1, int x2, int y2);
+
+        void drawRectangle(const gcn::Rectangle &rect, bool filled);
+
+        void drawRectangle(const gcn::Rectangle &rect);
+
+        void fillRectangle(const gcn::Rectangle &rect);
+
+        void setTargetPlane(int width, int height);
+
+        inline void drawTriangleArrayfs(GLshort *shortVertArray,
+                                        GLfloat *floatTexArray,
+                                        const int size);
+
+        inline void drawTriangleArrayfs(int size);
+
+        inline void drawLineArrays(int size);
+
+        inline void drawVertexes(NormalOpenGLGraphicsVertexes &ogl);
+
+        void initArrays() override;
+
+        static void dumpSettings();
+
+        /**
+         * Takes a screenshot and returns it as SDL surface.
+         */
+        SDL_Surface *getScreenshot() override;
+
+        void prepareScreenshot() override;
+
+        bool drawNet(const int x1, const int y1, const int x2, const int y2,
+                     const int width, const int height) override;
+
+        int getMemoryUsage();
+
+        void updateTextureFormat();
+
+        static void bindTexture(GLenum target, GLuint texture);
+
+        static GLuint mLastImage;
+
+    protected:
+        bool drawImage2(const Image *const image,
+                        int srcX, int srcY,
+                        int dstX, int dstY,
+                        const int width, const int height,
+                        const bool useColor) override;
+
+        void setTexturingAndBlending(bool enable);
+
+        void logString(const char *format, GLenum num);
+
+        void updateMemoryInfo();
+
+        void debugBindTexture(const Image *image);
+
+    private:
+        void inline setColorAlpha(float alpha);
+
+        void inline restoreColor();
+
+        GLfloat *mFloatTexArray;
+        GLint *mIntTexArray;
+        GLint *mIntVertArray;
+        GLshort *mShortVertArray;
+        bool mAlpha;
+        bool mTexture;
+
+        bool mIsByteColor;
+        gcn::Color mByteColor;
+        float mFloatColor;
+        int mMaxVertices;
+        bool mColorAlpha;
+        FBOInfo mFbo;
+#ifdef DEBUG_BIND_TEXTURE
+        std::string mOldTexture;
+        unsigned mOldTextureId;
+#endif
+};
+#endif
+
+//extern unsigned int vertexBufSize;
+
+#endif
diff --git a/src/normalopenglgraphics.cpp b/src/normalopenglgraphics.cpp
index cc0e05b3f..61f58dadf 100644
--- a/src/normalopenglgraphics.cpp
+++ b/src/normalopenglgraphics.cpp
@@ -42,7 +42,7 @@
 
 GLuint NormalOpenGLGraphics::mLastImage = 0;
 
-unsigned int vertexBufSize = 500;
+//unsigned int vertexBufSize = 500;
 
 NormalOpenGLGraphics::NormalOpenGLGraphics():
     mFloatTexArray(nullptr),
diff --git a/src/normalopenglgraphics.h b/src/normalopenglgraphics.h
index 35bdf557e..144a5b3ee 100644
--- a/src/normalopenglgraphics.h
+++ b/src/normalopenglgraphics.h
@@ -20,8 +20,8 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef OPENGLGRAPHICS_H
-#define OPENGLGRAPHICS_H
+#ifndef NORMALOPENGLGRAPHICS_H
+#define NORMALOPENGLGRAPHICS_H
 
 #include "main.h"
 #ifdef USE_OPENGL
@@ -206,6 +206,6 @@ class NormalOpenGLGraphics final : public Graphics
 };
 #endif
 
-extern unsigned int vertexBufSize;
+//extern unsigned int vertexBufSize;
 
 #endif
diff --git a/src/resources/image.cpp b/src/resources/image.cpp
index b342edcbf..c71cbdec9 100644
--- a/src/resources/image.cpp
+++ b/src/resources/image.cpp
@@ -26,6 +26,7 @@
 #include "resources/resourcemanager.h"
 
 #ifdef USE_OPENGL
+#include "mobileopenglgraphics.h"
 #include "normalopenglgraphics.h"
 #include "safeopenglgraphics.h"
 #endif
diff --git a/src/resources/image.h b/src/resources/image.h
index 36404b2b1..87a842aa3 100644
--- a/src/resources/image.h
+++ b/src/resources/image.h
@@ -64,6 +64,7 @@ class Image : public Resource
     friend class SDLImageHelper;
 #ifdef USE_OPENGL
     friend class AtlasManager;
+    friend class MobileOpenGLGraphics;
     friend class NormalOpenGLGraphics;
     friend class SafeOpenGLGraphics;
 #endif
diff --git a/src/resources/openglimagehelper.cpp b/src/resources/openglimagehelper.cpp
index a162ccf59..3f825d9db 100644
--- a/src/resources/openglimagehelper.cpp
+++ b/src/resources/openglimagehelper.cpp
@@ -29,6 +29,7 @@
 #include "graphicsmanager.h"
 #include "logger.h"
 #include "mgl.h"
+#include "mobileopenglgraphics.h"
 #include "normalopenglgraphics.h"
 #include "safeopenglgraphics.h"
 
@@ -215,15 +216,27 @@ Image *OpenGLImageHelper::glLoad(SDL_Surface *tmpImage)
 
     GLuint texture;
     glGenTextures(1, &texture);
-    if (mUseOpenGL == 1)
-        NormalOpenGLGraphics::bindTexture(mTextureType, texture);
-    else if (mUseOpenGL == 2)
-        SafeOpenGLGraphics::bindTexture(mTextureType, texture);
+    switch (mUseOpenGL)
+    {
+        case 1:
+            NormalOpenGLGraphics::bindTexture(mTextureType, texture);
+            break;
+        case 2:
+            SafeOpenGLGraphics::bindTexture(mTextureType, texture);
+            break;
+        case 3:
+            MobileOpenGLGraphics::bindTexture(mTextureType, texture);
+            break;
+        default:
+            logger->log("Unknown OpenGL backend: %d", mUseOpenGL);
+            break;
+    }
 
     if (SDL_MUSTLOCK(tmpImage))
         SDL_LockSurface(tmpImage);
 
     glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+
     if (!mUseTextureSampler)
     {
         if (mBlur)
diff --git a/src/resources/subimage.cpp b/src/resources/subimage.cpp
index a2d6a8c33..bb63f842a 100644
--- a/src/resources/subimage.cpp
+++ b/src/resources/subimage.cpp
@@ -23,6 +23,7 @@
 #include "resources/subimage.h"
 
 #ifdef USE_OPENGL
+#include "mobileopenglgraphics.h"
 #include "normalopenglgraphics.h"
 #include "safeopenglgraphics.h"
 #endif
diff --git a/src/safeopenglgraphics.h b/src/safeopenglgraphics.h
index 81494d5bd..a21dc8505 100644
--- a/src/safeopenglgraphics.h
+++ b/src/safeopenglgraphics.h
@@ -20,8 +20,8 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef OPENGL1GRAPHICS_H
-#define OPENGL1GRAPHICS_H
+#ifndef SAFEOPENGLGRAPHICS_H
+#define SAFEOPENGLGRAPHICS_H
 
 #ifdef USE_OPENGL
 #include "main.h"