add null opengl renderer.

5 files changed, 1449 insertions, 0 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 4aa8104e1..4e7286503 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -633,6 +633,8 @@ SET(SRCS
     notifications.h
     notifymanager.cpp
     notifymanager.h
+    nullopenglgraphics.cpp
+    nullopenglgraphics.h
     particle.cpp
     particle.h
     particlecontainer.cpp
diff --git a/src/Makefile.am b/src/Makefile.am
index b48c33de7..38b37afe1 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -634,6 +634,8 @@ manaplus_SOURCES += gui/widgets/avatarlistbox.cpp \
 	      notifications.h \
 	      notifymanager.cpp \
 	      notifymanager.h \
+	      nullopenglgraphics.cpp \
+	      nullopenglgraphics.h \
 	      particle.cpp \
 	      particle.h \
 	      particlecontainer.cpp \
diff --git a/src/nullopenglgraphics.cpp b/src/nullopenglgraphics.cpp
new file mode 100644
index 000000000..a74a89a0b
--- /dev/null
+++ b/src/nullopenglgraphics.cpp
@@ -0,0 +1,1211 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2004-2009  The Mana World Development Team
+ *  Copyright (C) 2009-2010  The Mana Developers
+ *  Copyright (C) 2011-2013  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"
+#if defined USE_OPENGL
+
+#include "nullopenglgraphics.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 NullOpenGLGraphics::mLastImage = 0;
+#ifdef DEBUG_DRAW_CALLS
+unsigned int NullOpenGLGraphics::mDrawCalls = 0;
+unsigned int NullOpenGLGraphics::mLastDrawCalls = 0;
+#endif
+
+NullOpenGLGraphics::NullOpenGLGraphics():
+    mFloatTexArray(nullptr),
+    mIntTexArray(nullptr),
+    mIntVertArray(nullptr),
+    mAlpha(false),
+    mTexture(false),
+    mIsByteColor(false),
+    mByteColor(),
+    mFloatColor(1.0f),
+    mMaxVertices(500),
+    mColorAlpha(false),
+#ifdef DEBUG_BIND_TEXTURE
+    mOldTexture(),
+    mOldTextureId(0),
+#endif
+    mFbo()
+{
+    mOpenGL = 100;
+    mName = "null OpenGL";
+}
+
+NullOpenGLGraphics::~NullOpenGLGraphics()
+{
+    delete [] mFloatTexArray;
+    delete [] mIntTexArray;
+    delete [] mIntVertArray;
+}
+
+void NullOpenGLGraphics::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;
+    const int sz = mMaxVertices * 4 + 30;
+    mFloatTexArray = new GLfloat[sz];
+    mIntTexArray = new GLint[sz];
+    mIntVertArray = new GLint[sz];
+}
+
+bool NullOpenGLGraphics::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 *const image A_UNUSED,
+                            const int srcX A_UNUSED, const int srcY A_UNUSED,
+                            const int dstX A_UNUSED, const int dstY A_UNUSED,
+                            const int width A_UNUSED,
+                            const int height A_UNUSED)
+{
+    if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D)
+    {
+#ifdef DEBUG_DRAW_CALLS
+        NullOpenGLGraphics::mDrawCalls ++;
+#endif
+    }
+    else
+    {
+#ifdef DEBUG_DRAW_CALLS
+        NullOpenGLGraphics::mDrawCalls ++;
+#endif
+    }
+}
+
+static inline void drawRescaledQuad(const Image *const image A_UNUSED,
+                                    const int srcX A_UNUSED,
+                                    const int srcY A_UNUSED,
+                                    const int dstX A_UNUSED,
+                                    const int dstY A_UNUSED,
+                                    const int width A_UNUSED,
+                                    const int height A_UNUSED,
+                                    const int desiredWidth A_UNUSED,
+                                    const int desiredHeight A_UNUSED)
+{
+    if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D)
+    {
+#ifdef DEBUG_DRAW_CALLS
+        NullOpenGLGraphics::mDrawCalls ++;
+#endif
+    }
+    else
+    {
+#ifdef DEBUG_DRAW_CALLS
+        NullOpenGLGraphics::mDrawCalls ++;
+#endif
+    }
+}
+
+
+bool NullOpenGLGraphics::drawImage2(const Image *const image,
+                                    int srcX, int srcY,
+                                    int dstX, int dstY,
+                                    const int width, const int height,
+                                    const bool useColor)
+{
+    FUNC_BLOCK("Graphics::drawImage2", 1)
+    if (!image)
+        return false;
+
+    const SDL_Rect &imageRect = image->mBounds;
+    srcX += imageRect.x;
+    srcY += imageRect.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 NullOpenGLGraphics::drawRescaledImage(const 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 NullOpenGLGraphics::drawRescaledImage(const 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)
+{
+    FUNC_BLOCK("Graphics::drawRescaledImage", 1)
+    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;
+
+    const SDL_Rect &imageRect = image->mBounds;
+    srcX += imageRect.x;
+    srcY += imageRect.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 NullOpenGLGraphics::drawImagePattern(const Image *const image,
+                                          const int x, const int y,
+                                          const int w, const int h)
+{
+    FUNC_BLOCK("Graphics::drawImagePattern", 1)
+    if (!image)
+        return;
+
+    const SDL_Rect &imageRect = image->mBounds;
+    const int srcX = imageRect.x;
+    const int srcY = imageRect.y;
+    const int iw = imageRect.w;
+    const int ih = imageRect.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)
+    {
+        const float texX1 = static_cast<float>(srcX) / tw;
+        const 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;
+            const float texY2 = static_cast<float>(srcY + height) / th;
+            for (int px = 0; px < w; px += iw)
+            {
+                const int width = (px + iw >= w) ? w - px : iw;
+                const int dstX = x + px;
+
+                const float texX2 = static_cast<float>(srcX + width) / tw;
+
+                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] = texY2;
+
+                mIntVertArray[vp + 0] = dstX;
+                mIntVertArray[vp + 1] = dstY;
+
+                mIntVertArray[vp + 2] = dstX + width;
+                mIntVertArray[vp + 3] = dstY;
+
+                mIntVertArray[vp + 4] = dstX + width;
+                mIntVertArray[vp + 5] = dstY + height;
+
+                mIntVertArray[vp + 6] = dstX;
+                mIntVertArray[vp + 7] = dstY + height;
+
+                vp += 8;
+                if (vp >= vLimit)
+                {
+                    drawQuadArrayfi(vp);
+                    vp = 0;
+                }
+            }
+        }
+        if (vp > 0)
+            drawQuadArrayfi(vp);
+    }
+    else
+    {
+        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)
+            {
+                const int width = (px + iw >= w) ? w - px : iw;
+                const int dstX = x + px;
+
+                mIntTexArray[vp + 0] = srcX;
+                mIntTexArray[vp + 1] = srcY;
+
+                mIntTexArray[vp + 2] = srcX + width;
+                mIntTexArray[vp + 3] = srcY;
+
+                mIntTexArray[vp + 4] = srcX + width;
+                mIntTexArray[vp + 5] = srcY + height;
+
+                mIntTexArray[vp + 6] = srcX;
+                mIntTexArray[vp + 7] = srcY + height;
+
+                mIntVertArray[vp + 0] = dstX;
+                mIntVertArray[vp + 1] = dstY;
+
+                mIntVertArray[vp + 2] = dstX + width;
+                mIntVertArray[vp + 3] = dstY;
+
+                mIntVertArray[vp + 4] = dstX + width;
+                mIntVertArray[vp + 5] = dstY + height;
+
+                mIntVertArray[vp + 6] = dstX;
+                mIntVertArray[vp + 7] = dstY + height;
+
+                vp += 8;
+                if (vp >= vLimit)
+                {
+                    drawQuadArrayii(vp);
+                    vp = 0;
+                }
+            }
+        }
+        if (vp > 0)
+            drawQuadArrayii(vp);
+    }
+}
+
+void NullOpenGLGraphics::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 SDL_Rect &imageRect = image->mBounds;
+    const int iw = imageRect.w;
+    const int ih = imageRect.h;
+    if (iw == 0 || ih == 0)
+        return;
+
+    const int srcX = imageRect.x;
+    const int srcY = imageRect.y;
+
+    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;
+            const float visibleFractionH = static_cast<float>(height)
+                / scaledHeight;
+            const float texY2 = texY1 + tFractionH * visibleFractionH;
+            for (int px = 0; px < w; px += scaledWidth)
+            {
+                const int width = (px + scaledWidth >= w)
+                    ? w - px : scaledWidth;
+                const int dstX = x + px;
+                const float visibleFractionW = static_cast<float>(width)
+                    / scaledWidth;
+                const float texX2 = texX1 + tFractionW * visibleFractionW;
+
+                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] = texY2;
+
+                mIntVertArray[vp + 0] = dstX;
+                mIntVertArray[vp + 1] = dstY;
+
+                mIntVertArray[vp + 2] = dstX + width;
+                mIntVertArray[vp + 3] = dstY;
+
+                mIntVertArray[vp + 4] = dstX + width;
+                mIntVertArray[vp + 5] = dstY + height;
+
+                mIntVertArray[vp + 6] = dstX;
+                mIntVertArray[vp + 7] = dstY + height;
+
+                vp += 8;
+                if (vp >= vLimit)
+                {
+                    drawQuadArrayfi(vp);
+                    vp = 0;
+                }
+            }
+        }
+        if (vp > 0)
+            drawQuadArrayfi(vp);
+    }
+    else
+    {
+        const float scaleFactorW = static_cast<float>(scaledWidth) / iw;
+        const float scaleFactorH = static_cast<float>(scaledHeight) / ih;
+
+        for (int py = 0; py < h; py += scaledHeight)
+        {
+            const int height = (py + scaledHeight >= h)
+                ? h - py : scaledHeight;
+            const int dstY = y + py;
+            const int scaledY = srcY + height / scaleFactorH;
+            for (int px = 0; px < w; px += scaledWidth)
+            {
+                const int width = (px + scaledWidth >= w)
+                    ? w - px : scaledWidth;
+                const int dstX = x + px;
+                const int scaledX = srcX + width / scaleFactorW;
+
+                mIntTexArray[vp + 0] = srcX;
+                mIntTexArray[vp + 1] = srcY;
+
+                mIntTexArray[vp + 2] = scaledX;
+                mIntTexArray[vp + 3] = srcY;
+
+                mIntTexArray[vp + 4] = scaledX;
+                mIntTexArray[vp + 5] = scaledY;
+
+                mIntTexArray[vp + 6] = srcX;
+                mIntTexArray[vp + 7] = scaledY;
+
+                mIntVertArray[vp + 0] = dstX;
+                mIntVertArray[vp + 1] = dstY;
+
+                mIntVertArray[vp + 2] = dstX + width;
+                mIntVertArray[vp + 3] = dstY;
+
+                mIntVertArray[vp + 4] = dstX + width;
+                mIntVertArray[vp + 5] = dstY + height;
+
+                mIntVertArray[vp + 6] = dstX;
+                mIntVertArray[vp + 7] = dstY + height;
+
+                vp += 8;
+                if (vp >= vLimit)
+                {
+                    drawQuadArrayii(vp);
+                    vp = 0;
+                }
+            }
+        }
+        if (vp > 0)
+            drawQuadArrayii(vp);
+    }
+}
+
+inline void NullOpenGLGraphics::drawVertexes(const
+                                             NormalOpenGLGraphicsVertexes
+                                             &ogl)
+{
+    const std::vector<GLint*> &intVertPool = ogl.mIntVertPool;
+    std::vector<GLint*>::const_iterator iv;
+    const std::vector<GLint*>::const_iterator iv_end = intVertPool.end();
+    const std::vector<int> &vp = ogl.mVp;
+    std::vector<int>::const_iterator ivp;
+    const std::vector<int>::const_iterator ivp_end = vp.end();
+
+    // Draw a set of textured rectangles
+    if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D)
+    {
+        const std::vector<GLfloat*> &floatTexPool = ogl.mFloatTexPool;
+        std::vector<GLfloat*>::const_iterator ft;
+        const std::vector<GLfloat*>::const_iterator
+            ft_end = floatTexPool.end();
+
+        for (iv = intVertPool.begin(), ft = floatTexPool.begin(),
+             ivp = vp.begin();
+             iv != iv_end, ft != ft_end,
+             ivp != ivp_end;
+             ++ iv, ++ ft, ++ ivp)
+        {
+            drawQuadArrayfi(*iv, *ft, *ivp);
+        }
+    }
+    else
+    {
+        const std::vector<GLint*> &intTexPool = ogl.mIntTexPool;
+        std::vector<GLint*>::const_iterator it;
+        const std::vector<GLint*>::const_iterator it_end = intTexPool.end();
+
+        for (iv = intVertPool.begin(), it = intTexPool.begin(),
+             ivp = vp.begin();
+             iv != iv_end, it != it_end,
+             ivp != ivp_end;
+             ++ iv, ++ it, ++ ivp)
+        {
+            drawQuadArrayii(*iv, *it, *ivp);
+        }
+    }
+}
+
+void NullOpenGLGraphics::calcImagePattern(ImageVertexes* const vert,
+                                          const Image *const image,
+                                          const int x, const int y,
+                                          const int w, const int h) const
+{
+    if (!image)
+        return;
+
+    const SDL_Rect &imageRect = image->mBounds;
+    const int iw = imageRect.w;
+    const int ih = imageRect.h;
+
+    if (iw == 0 || ih == 0)
+        return;
+
+    const int srcX = imageRect.x;
+    const int srcY = imageRect.y;
+    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;
+    unsigned int vp = ogl.continueVp();
+
+    // Draw a set of textured rectangles
+    if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D)
+    {
+        const float texX1 = static_cast<float>(srcX) / tw;
+        const float texY1 = static_cast<float>(srcY) / th;
+
+        GLfloat *floatTexArray = ogl.continueFloatTexArray();
+        GLint *intVertArray = ogl.continueIntVertArray();
+
+        for (int py = 0; py < h; py += ih)
+        {
+            const int height = (py + ih >= h) ? h - py : ih;
+            const int dstY = y + py;
+            const float texY2 = static_cast<float>(srcY + height) / th;
+            for (int px = 0; px < w; px += iw)
+            {
+                const int width = (px + iw >= w) ? w - px : iw;
+                const int dstX = x + px;
+                const float texX2 = static_cast<float>(srcX + width) / tw;
+
+                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] = texY2;
+
+                intVertArray[vp + 0] = dstX;
+                intVertArray[vp + 1] = dstY;
+
+                intVertArray[vp + 2] = dstX + width;
+                intVertArray[vp + 3] = dstY;
+
+                intVertArray[vp + 4] = dstX + width;
+                intVertArray[vp + 5] = dstY + height;
+
+                intVertArray[vp + 6] = dstX;
+                intVertArray[vp + 7] = dstY + height;
+
+                vp += 8;
+                if (vp >= vLimit)
+                {
+                    floatTexArray = ogl.switchFloatTexArray();
+                    intVertArray = ogl.switchIntVertArray();
+                    ogl.switchVp(vp);
+                    vp = 0;
+                }
+            }
+        }
+    }
+    else
+    {
+        GLint *intTexArray = ogl.continueIntTexArray();
+        GLint *intVertArray = ogl.continueIntVertArray();
+
+        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)
+            {
+                const int width = (px + iw >= w) ? w - px : iw;
+                const int dstX = x + px;
+
+                intTexArray[vp + 0] = srcX;
+                intTexArray[vp + 1] = srcY;
+
+                intTexArray[vp + 2] = srcX + width;
+                intTexArray[vp + 3] = srcY;
+
+                intTexArray[vp + 4] = srcX + width;
+                intTexArray[vp + 5] = srcY + height;
+
+                intTexArray[vp + 6] = srcX;
+                intTexArray[vp + 7] = srcY + height;
+
+                intVertArray[vp + 0] = dstX;
+                intVertArray[vp + 1] = dstY;
+
+                intVertArray[vp + 2] = dstX + width;
+                intVertArray[vp + 3] = dstY;
+
+                intVertArray[vp + 4] = dstX + width;
+                intVertArray[vp + 5] = dstY + height;
+
+                intVertArray[vp + 6] = dstX;
+                intVertArray[vp + 7] = dstY + height;
+
+                vp += 8;
+                if (vp >= vLimit)
+                {
+                    intTexArray = ogl.switchIntTexArray();
+                    intVertArray = ogl.switchIntVertArray();
+                    ogl.switchVp(vp);
+                    vp = 0;
+                }
+            }
+        }
+    }
+    ogl.switchVp(vp);
+}
+
+void NullOpenGLGraphics::calcTile(ImageCollection *const vertCol,
+                                  const Image *const image,
+                                  int x, int y)
+{
+    if (vertCol->currentGLImage != image->mGLImage)
+    {
+        ImageVertexes *const vert = new ImageVertexes();
+        vertCol->currentGLImage = image->mGLImage;
+        vertCol->currentVert = vert;
+        vert->image = image;
+        vertCol->draws.push_back(vert);
+        calcTile(vert, image, x, y);
+    }
+    else
+    {
+        calcTile(vertCol->currentVert, image, x, y);
+    }
+}
+
+void NullOpenGLGraphics::drawTile(const ImageCollection *const vertCol)
+{
+    const ImageVertexesVector &draws = vertCol->draws;
+    const ImageCollectionCIter it_end = draws.end();
+    for (ImageCollectionCIter it = draws.begin(); it != it_end; ++ it)
+    {
+        const ImageVertexes *const vert = *it;
+        const Image *const image = vert->image;
+
+        setColorAlpha(image->mAlpha);
+#ifdef DEBUG_BIND_TEXTURE
+        debugBindTexture(image);
+#endif
+        bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
+        setTexturingAndBlending(true);
+        drawVertexes(vert->ogl);
+    }
+}
+
+void NullOpenGLGraphics::calcImagePattern(ImageCollection* const vertCol,
+                                          const Image *const image,
+                                          const int x, const int y,
+                                          const int w, const int h) const
+{
+    ImageVertexes *vert = nullptr;
+    if (vertCol->currentGLImage != image->mGLImage)
+    {
+        vert = new ImageVertexes();
+        vertCol->currentGLImage = image->mGLImage;
+        vertCol->currentVert = vert;
+        vert->image = image;
+        vertCol->draws.push_back(vert);
+    }
+    else
+    {
+        vert = vertCol->currentVert;
+    }
+
+    calcImagePattern(vert, image, x, y, w, h);
+}
+
+void NullOpenGLGraphics::calcTile(ImageVertexes *const vert,
+                                  const Image *const image,
+                                  int dstX, int dstY) const
+{
+    if (!vert || !image)
+        return;
+
+    const SDL_Rect &imageRect = image->mBounds;
+    const int w = imageRect.w;
+    const int h = imageRect.h;
+
+    if (w == 0 || h == 0)
+        return;
+
+    const int srcX = imageRect.x;
+    const int srcY = imageRect.y;
+
+    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)
+    {
+        const float texX1 = static_cast<float>(srcX) / tw;
+        const float texY1 = static_cast<float>(srcY) / th;
+
+        const float texX2 = static_cast<float>(srcX + w) / tw;
+        const float texY2 = static_cast<float>(srcY + h) / th;
+
+        GLfloat *const floatTexArray = ogl.continueFloatTexArray();
+        GLint *const intVertArray = ogl.continueIntVertArray();
+
+        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] = texY2;
+
+        intVertArray[vp + 0] = dstX;
+        intVertArray[vp + 1] = dstY;
+
+        intVertArray[vp + 2] = dstX + w;
+        intVertArray[vp + 3] = dstY;
+
+        intVertArray[vp + 4] = dstX + w;
+        intVertArray[vp + 5] = dstY + h;
+
+        intVertArray[vp + 6] = dstX;
+        intVertArray[vp + 7] = dstY + h;
+
+        vp += 8;
+        if (vp >= vLimit)
+        {
+            ogl.switchFloatTexArray();
+            ogl.switchIntVertArray();
+            ogl.switchVp(vp);
+            vp = 0;
+        }
+    }
+    else
+    {
+        GLint *const intTexArray = ogl.continueIntTexArray();
+        GLint *const intVertArray = ogl.continueIntVertArray();
+
+        intTexArray[vp + 0] = srcX;
+        intTexArray[vp + 1] = srcY;
+
+        intTexArray[vp + 2] = srcX + w;
+        intTexArray[vp + 3] = srcY;
+
+        intTexArray[vp + 4] = srcX + w;
+        intTexArray[vp + 5] = srcY + h;
+
+        intTexArray[vp + 6] = srcX;
+        intTexArray[vp + 7] = srcY + h;
+
+        intVertArray[vp + 0] = dstX;
+        intVertArray[vp + 1] = dstY;
+
+        intVertArray[vp + 2] = dstX + w;
+        intVertArray[vp + 3] = dstY;
+
+        intVertArray[vp + 4] = dstX + w;
+        intVertArray[vp + 5] = dstY + h;
+
+        intVertArray[vp + 6] = dstX;
+        intVertArray[vp + 7] = dstY + h;
+
+        vp += 8;
+        if (vp >= vLimit)
+        {
+            ogl.switchIntTexArray();
+            ogl.switchIntVertArray();
+            ogl.switchVp(vp);
+            vp = 0;
+        }
+    }
+    ogl.switchVp(vp);
+}
+
+void NullOpenGLGraphics::drawTile(const ImageVertexes *const vert)
+{
+    if (!vert)
+        return;
+    const Image *const image = vert->image;
+
+    setColorAlpha(image->mAlpha);
+#ifdef DEBUG_BIND_TEXTURE
+    debugBindTexture(image);
+#endif
+    bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
+    setTexturingAndBlending(true);
+    drawVertexes(vert->ogl);
+}
+
+bool NullOpenGLGraphics::calcWindow(ImageCollection *const vertCol,
+                                    const int x, const int y,
+                                    const int w, const int h,
+                                    const ImageRect &imgRect)
+{
+    ImageVertexes *vert = nullptr;
+    Image *const image = imgRect.grid[4];
+    if (!image)
+        return false;
+    if (vertCol->currentGLImage != image->mGLImage)
+    {
+        vert = new ImageVertexes();
+        vertCol->currentGLImage = image->mGLImage;
+        vertCol->currentVert = vert;
+        vert->image = image;
+        vertCol->draws.push_back(vert);
+    }
+    else
+    {
+        vert = vertCol->currentVert;
+    }
+
+    return calcImageRect(vert, x, y, w, h,
+        imgRect.grid[0], imgRect.grid[2], imgRect.grid[6], imgRect.grid[8],
+        imgRect.grid[1], imgRect.grid[5], imgRect.grid[7], imgRect.grid[3],
+        imgRect.grid[4]);
+}
+
+void NullOpenGLGraphics::updateScreen()
+{
+    BLOCK_START("Graphics::updateScreen")
+#ifdef DEBUG_DRAW_CALLS
+    mLastDrawCalls = mDrawCalls;
+    mDrawCalls = 0;
+#endif
+    BLOCK_END("Graphics::updateScreen")
+}
+
+void NullOpenGLGraphics::_beginDraw()
+{
+    pushClipArea(gcn::Rectangle(0, 0, 640, 480));
+}
+
+void NullOpenGLGraphics::_endDraw()
+{
+    popClipArea();
+}
+
+void NullOpenGLGraphics::prepareScreenshot()
+{
+}
+
+SDL_Surface* NullOpenGLGraphics::getScreenshot()
+{
+    return nullptr;
+}
+
+bool NullOpenGLGraphics::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;
+    }
+
+    const bool result = gcn::Graphics::pushClipArea(area);
+
+    const gcn::ClipRectangle &clipArea = mClipStack.top();
+    transX += clipArea.xOffset;
+    transY += clipArea.yOffset;
+
+    return result;
+}
+
+void NullOpenGLGraphics::popClipArea()
+{
+    gcn::Graphics::popClipArea();
+
+    if (mClipStack.empty())
+        return;
+}
+
+void NullOpenGLGraphics::drawPoint(int x A_UNUSED, int y A_UNUSED)
+{
+    setTexturingAndBlending(false);
+    restoreColor();
+}
+
+void NullOpenGLGraphics::drawLine(int x1 A_UNUSED, int y1 A_UNUSED,
+                                  int x2 A_UNUSED, int y2 A_UNUSED)
+{
+    setTexturingAndBlending(false);
+    restoreColor();
+
+    mFloatTexArray[0] = static_cast<float>(x1) + 0.5f;
+    mFloatTexArray[1] = static_cast<float>(y1) + 0.5f;
+    mFloatTexArray[2] = static_cast<float>(x2) + 0.5f;
+    mFloatTexArray[3] = static_cast<float>(y2) + 0.5f;
+
+    drawLineArrayf(4);
+}
+
+void NullOpenGLGraphics::drawRectangle(const gcn::Rectangle& rect)
+{
+    drawRectangle(rect, false);
+}
+
+void NullOpenGLGraphics::fillRectangle(const gcn::Rectangle& rect)
+{
+    drawRectangle(rect, true);
+}
+
+void NullOpenGLGraphics::setTargetPlane(int width A_UNUSED,
+                                        int height A_UNUSED)
+{
+}
+
+void NullOpenGLGraphics::setTexturingAndBlending(const bool enable)
+{
+    if (enable)
+    {
+        if (!mTexture)
+            mTexture = true;
+
+        if (!mAlpha)
+            mAlpha = true;
+    }
+    else
+    {
+        mLastImage = 0;
+        if (mAlpha && !mColorAlpha)
+            mAlpha = false;
+        else if (!mAlpha && mColorAlpha)
+            mAlpha = true;
+
+        if (mTexture)
+            mTexture = false;
+    }
+}
+
+void NullOpenGLGraphics::drawRectangle(const gcn::Rectangle& rect A_UNUSED,
+                                       const bool filled A_UNUSED)
+{
+    BLOCK_START("Graphics::drawRectangle")
+    setTexturingAndBlending(false);
+    restoreColor();
+
+#ifdef DEBUG_DRAW_CALLS
+        mDrawCalls ++;
+#endif
+    BLOCK_END("Graphics::drawRectangle")
+}
+
+bool NullOpenGLGraphics::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 float xf1 = static_cast<float>(x1);
+    const float xf2 = static_cast<float>(x2);
+    const float yf1 = static_cast<float>(y1);
+    const float yf2 = static_cast<float>(y2);
+
+    for (int y = y1; y < y2; y += height)
+    {
+        mFloatTexArray[vp + 0] = xf1;
+        mFloatTexArray[vp + 1] = static_cast<float>(y);
+
+        mFloatTexArray[vp + 2] = xf2;
+        mFloatTexArray[vp + 3] = static_cast<float>(y);
+
+        vp += 4;
+        if (vp >= vLimit)
+        {
+            drawLineArrayf(vp);
+            vp = 0;
+        }
+    }
+
+    for (int x = x1; x < x2; x += width)
+    {
+        mFloatTexArray[vp + 0] = static_cast<float>(x);
+        mFloatTexArray[vp + 1] = yf1;
+
+        mFloatTexArray[vp + 2] = static_cast<float>(x);
+        mFloatTexArray[vp + 3] = yf2;
+
+        vp += 4;
+        if (vp >= vLimit)
+        {
+            drawLineArrayf(vp);
+            vp = 0;
+        }
+    }
+
+    if (vp > 0)
+        drawLineArrayf(vp);
+
+    return true;
+}
+
+void NullOpenGLGraphics::bindTexture(const GLenum target A_UNUSED,
+                                     const GLuint texture)
+{
+    if (mLastImage != texture)
+        mLastImage = texture;
+}
+
+inline void NullOpenGLGraphics::drawQuadArrayfi(const int size A_UNUSED)
+{
+#ifdef DEBUG_DRAW_CALLS
+    mDrawCalls ++;
+#endif
+}
+
+inline void NullOpenGLGraphics::drawQuadArrayfi(const GLint *const
+                                                intVertArray A_UNUSED,
+                                                const GLfloat *const
+                                                floatTexArray A_UNUSED,
+                                                const int size A_UNUSED)
+{
+#ifdef DEBUG_DRAW_CALLS
+    mDrawCalls ++;
+#endif
+}
+
+inline void NullOpenGLGraphics::drawQuadArrayii(const int size A_UNUSED)
+{
+#ifdef DEBUG_DRAW_CALLS
+    mDrawCalls ++;
+#endif
+}
+
+inline void NullOpenGLGraphics::drawQuadArrayii(const GLint *const
+                                                intVertArray A_UNUSED,
+                                                const GLint *const
+                                                intTexArray A_UNUSED,
+                                                const int size A_UNUSED)
+{
+#ifdef DEBUG_DRAW_CALLS
+    mDrawCalls ++;
+#endif
+}
+
+inline void NullOpenGLGraphics::drawLineArrayi(const int size A_UNUSED)
+{
+#ifdef DEBUG_DRAW_CALLS
+    mDrawCalls ++;
+#endif
+}
+
+inline void NullOpenGLGraphics::drawLineArrayf(const int size A_UNUSED)
+{
+#ifdef DEBUG_DRAW_CALLS
+    mDrawCalls ++;
+#endif
+}
+
+void NullOpenGLGraphics::dumpSettings()
+{
+}
+
+void NullOpenGLGraphics::setColorAlpha(const float alpha)
+{
+    if (!mIsByteColor && mFloatColor == alpha)
+        return;
+
+    mIsByteColor = false;
+    mFloatColor = alpha;
+}
+
+void NullOpenGLGraphics::restoreColor()
+{
+    if (mIsByteColor && mByteColor == mColor)
+        return;
+
+    mIsByteColor = true;
+    mByteColor = mColor;
+}
+
+#ifdef DEBUG_BIND_TEXTURE
+void NullOpenGLGraphics::debugBindTexture(const Image *const 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 NullOpenGLGraphics::debugBindTexture(const Image *const image A_UNUSED)
+{
+}
+#endif
+
+#endif  // USE_OPENGL
diff --git a/src/nullopenglgraphics.h b/src/nullopenglgraphics.h
new file mode 100644
index 000000000..61ec8e0f3
--- /dev/null
+++ b/src/nullopenglgraphics.h
@@ -0,0 +1,233 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2004-2009  The Mana World Development Team
+ *  Copyright (C) 2009-2010  The Mana Developers
+ *  Copyright (C) 2011-2013  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 NULLOPENGLGRAPHICS_H
+#define NULLOPENGLGRAPHICS_H
+
+#include "main.h"
+#if defined 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 NullOpenGLGraphics final : public Graphics
+{
+    public:
+        NullOpenGLGraphics();
+
+        A_DELETE_COPY(NullOpenGLGraphics)
+
+        ~NullOpenGLGraphics();
+
+        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(const 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(const 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(ImageVertexes* const vert,
+                              const Image *const image,
+                              const int x, const int y,
+                              const int w, const int h) const override;
+
+        void calcImagePattern(ImageCollection* const vert,
+                              const Image *const image,
+                              const int x, const int y,
+                              const int w, const int h) const override;
+
+        void calcTile(ImageVertexes *const vert, const Image *const image,
+                      int x, int y) const override;
+
+        void calcTile(ImageCollection *const vertCol,
+                      const Image *const image, int x, int y) override;
+
+        void drawTile(const ImageCollection *const vertCol) override;
+
+        void drawTile(const ImageVertexes *const vert) override;
+
+        bool calcWindow(ImageCollection *const vertCol,
+                        const int x, const int y,
+                        const int w, const int h,
+                        const ImageRect &imgRect) override;
+
+        void updateScreen() override;
+
+        void _beginDraw();
+
+        void _endDraw();
+
+        bool pushClipArea(gcn::Rectangle area);
+
+        void popClipArea();
+
+        void setColor(const gcn::Color &color)
+        {
+            mColor = color;
+            mColor2 = color;
+            mColorAlpha = (color.a != 255);
+        }
+
+        void drawPoint(int x, int y);
+
+        void drawLine(int x1, int y1, int x2, int y2);
+
+        void drawRectangle(const gcn::Rectangle &rect, const bool filled);
+
+        void drawRectangle(const gcn::Rectangle &rect);
+
+        void fillRectangle(const gcn::Rectangle &rect);
+
+        void setTargetPlane(int width, int height);
+
+        inline void drawQuadArrayfi(const int size);
+
+        inline void drawQuadArrayfi(const GLint *const intVertArray,
+                                    const GLfloat *const floatTexArray,
+                                    const int size);
+
+        inline void drawQuadArrayii(const int size);
+
+        inline void drawQuadArrayii(const GLint *const intVertArray,
+                                    const GLint *const intTexArray,
+                                    const int size);
+
+        inline void drawLineArrayi(const int size);
+
+        inline void drawLineArrayf(const int size);
+
+        inline void drawVertexes(const NormalOpenGLGraphicsVertexes &ogl);
+
+        void initArrays() override;
+
+        static void dumpSettings();
+
+        /**
+         * Takes a screenshot and returns it as SDL surface.
+         */
+        SDL_Surface *getScreenshot() override A_WARN_UNUSED;
+
+        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() A_WARN_UNUSED;
+
+        void updateTextureFormat();
+
+#ifdef DEBUG_DRAW_CALLS
+        virtual unsigned int getDrawCalls() const
+        { return mLastDrawCalls; }
+
+        static unsigned int mDrawCalls;
+
+        static unsigned int mLastDrawCalls;
+#endif
+
+        static void bindTexture(const GLenum target, const 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(const bool enable);
+
+        void updateMemoryInfo();
+
+        void debugBindTexture(const Image *const image);
+
+    private:
+        void inline setColorAlpha(float alpha);
+
+        void inline restoreColor();
+
+        GLfloat *mFloatTexArray;
+        GLint *mIntTexArray;
+        GLint *mIntVertArray;
+        bool mAlpha;
+        bool mTexture;
+
+        bool mIsByteColor;
+        gcn::Color mByteColor;
+        float mFloatColor;
+        int mMaxVertices;
+        bool mColorAlpha;
+#ifdef DEBUG_BIND_TEXTURE
+        std::string mOldTexture;
+        unsigned mOldTextureId;
+#endif
+        FBOInfo mFbo;
+};
+#endif
+
+#endif
diff --git a/src/resources/image.h b/src/resources/image.h
index 05350bb66..fb99c2cdf 100644
--- a/src/resources/image.h
+++ b/src/resources/image.h
@@ -60,6 +60,7 @@ class Image : public Resource
     friend class AtlasManager;
     friend class MobileOpenGLGraphics;
     friend class NormalOpenGLGraphics;
+    friend class NullOpenGLGraphics;
     friend class SafeOpenGLGraphics;
 #endif