add calcImageRect into each renderer. but copy function body to shared file.

19 files changed, 208 insertions, 108 deletions

diff --git a/src/render/graphics.cpp b/src/render/graphics.cpp
index abb696bc9..7903b6431 100644
--- a/src/render/graphics.cpp
+++ b/src/render/graphics.cpp
@@ -452,76 +452,6 @@ bool Graphics::drawNet(const int x1, const int y1, const int x2, const int y2,
     return true;
 }
 
-bool Graphics::calcImageRect(ImageVertexes *const vert,
-                             const int x, const int y,
-                             const int w, const int h,
-                             const ImageRect &imgRect)
-{
-    if (!vert)
-        return false;
-
-    BLOCK_START("Graphics::calcImageRect")
-
-    const Image *const *const grid = imgRect.grid;
-    const Image *const topLeft = grid[0];
-    const Image *const topRight = grid[2];
-    const Image *const bottomLeft = grid[6];
-    const Image *const bottomRight = grid[8];
-    const Image *const top = grid[1];
-    const Image *const right = grid[5];
-    const Image *const bottom = grid[7];
-    const Image *const left = grid[3];
-    const Image *const center = grid[4];
-
-    const bool drawMain = center && topLeft && topRight
-        && bottomLeft && bottomRight;
-
-    // Draw the center area
-    if (center && drawMain)
-    {
-        const int tlw = topLeft->getWidth();
-        const int tlh = topLeft->getHeight();
-        calcPattern(vert, center, tlw + x, tlh + y,
-            w - tlw - topRight->getWidth(),
-            h - tlh - bottomLeft->getHeight());
-    }
-    // Draw the sides
-    if (top && left && bottom && right)
-    {
-        const int lw = left->getWidth();
-        const int rw = right->getWidth();
-        const int th = top->getHeight();
-        const int bh = bottom->getHeight();
-        calcPattern(vert, top, x + lw, y, w - lw - rw, th);
-        calcPattern(vert, bottom, x + lw, y + h - bh, w - lw - rw, bh);
-        calcPattern(vert, left, x, y + th, lw, h - th - bh);
-        if (w > rw)
-            calcPattern(vert, right, x + w - rw, y + th, rw, h - th - bh);
-    }
-
-    calcTileVertexes(vert, topLeft, x, y);
-    if (topRight)
-    {
-        const int trw = topRight->getWidth();
-        if (w > trw)
-            calcTileVertexes(vert, topRight, x + w - trw, y);
-    }
-    if (bottomLeft)
-        calcTileVertexes(vert, bottomLeft, x, y + h - bottomLeft->getHeight());
-    if (bottomRight)
-    {
-        const int brw = bottomRight->getWidth();
-        if (w > brw)
-        {
-            calcTileVertexes(vert, bottomRight, x + w - brw,
-                y + h - bottomRight->getHeight());
-        }
-    }
-
-    BLOCK_END("Graphics::calcImageRect")
-    return 0;
-}
-
 void Graphics::setWindowSize(const int width A_UNUSED,
                              const int height A_UNUSED)
 {
diff --git a/src/render/graphics.h b/src/render/graphics.h
index 8567b4c1f..987c8f849 100644
--- a/src/render/graphics.h
+++ b/src/render/graphics.h
@@ -174,11 +174,6 @@ class Graphics : public gcn::Graphics
                                    const int w, const int h,
                                    const ImageRect &imgRect) = 0;
 
-        bool calcImageRect(ImageVertexes *const vert,
-                           const int x, const int y,
-                           const int w, const int h,
-                           const ImageRect &imgRect);
-
         virtual void calcPattern(ImageVertexes *const vert,
                                  const Image *const image,
                                  const int x, const int y,
@@ -207,7 +202,7 @@ class Graphics : public gcn::Graphics
                                         const Image *const image,
                                         int x, int y) = 0;
 
-        virtual bool calcWindow(ImageCollection *const vertCol,
+        virtual void calcWindow(ImageCollection *const vertCol,
                                 const int x, const int y,
                                 const int w, const int h,
                                 const ImageRect &imgRect) = 0;
diff --git a/src/render/mobileopenglgraphics.cpp b/src/render/mobileopenglgraphics.cpp
index d716582ef..1b57f7160 100644
--- a/src/render/mobileopenglgraphics.cpp
+++ b/src/render/mobileopenglgraphics.cpp
@@ -771,7 +771,7 @@ void MobileOpenGLGraphics::drawTileVertexes(const ImageVertexes *const vert)
     drawVertexes(vert->ogl);
 }
 
-bool MobileOpenGLGraphics::calcWindow(ImageCollection *const vertCol,
+void MobileOpenGLGraphics::calcWindow(ImageCollection *const vertCol,
                                       const int x, const int y,
                                       const int w, const int h,
                                       const ImageRect &imgRect)
@@ -790,8 +790,7 @@ bool MobileOpenGLGraphics::calcWindow(ImageCollection *const vertCol,
     {
         vert = vertCol->currentVert;
     }
-
-    return calcImageRect(vert, x, y, w, h, imgRect);
+    calcImageRect(vert, x, y, w, h, imgRect);
 }
 
 void MobileOpenGLGraphics::updateScreen()
@@ -1272,6 +1271,14 @@ void MobileOpenGLGraphics::drawImageRect(const int x, const int y,
     #include "render/openglgraphics_drawImageRect.hpp"
 }
 
+void MobileOpenGLGraphics::calcImageRect(ImageVertexes *const vert,
+                                         const int x, const int y,
+                                         const int w, const int h,
+                                         const ImageRect &imgRect)
+{
+    #include "render/openglgraphics_calcImageRect.hpp"
+}
+
 #ifdef DEBUG_BIND_TEXTURE
 void MobileOpenGLGraphics::debugBindTexture(const Image *const image)
 {
diff --git a/src/render/mobileopenglgraphics.h b/src/render/mobileopenglgraphics.h
index 08e1979f2..3bc095cda 100644
--- a/src/render/mobileopenglgraphics.h
+++ b/src/render/mobileopenglgraphics.h
@@ -101,6 +101,11 @@ class MobileOpenGLGraphics final : public Graphics
 
         void inline restoreColor();
 
+        void inline calcImageRect(ImageVertexes *const vert,
+                                  int x, int y,
+                                  int w, int h,
+                                  const ImageRect &imgRect);
+
         GLfloat *mFloatTexArray;
         GLshort *mShortVertArray;
         GLfloat *mFloatTexArrayCached;
diff --git a/src/render/normalopenglgraphics.cpp b/src/render/normalopenglgraphics.cpp
index 6626564eb..e3e0d7e19 100644
--- a/src/render/normalopenglgraphics.cpp
+++ b/src/render/normalopenglgraphics.cpp
@@ -1024,7 +1024,7 @@ void NormalOpenGLGraphics::drawTileVertexes(const ImageVertexes *const vert)
     drawVertexes(vert->ogl);
 }
 
-bool NormalOpenGLGraphics::calcWindow(ImageCollection *const vertCol,
+void NormalOpenGLGraphics::calcWindow(ImageCollection *const vertCol,
                                       const int x, const int y,
                                       const int w, const int h,
                                       const ImageRect &imgRect)
@@ -1032,7 +1032,7 @@ bool NormalOpenGLGraphics::calcWindow(ImageCollection *const vertCol,
     ImageVertexes *vert = nullptr;
     Image *const image = imgRect.grid[4];
     if (!image)
-        return false;
+        return;
     if (vertCol->currentGLImage != image->mGLImage)
     {
         vert = new ImageVertexes();
@@ -1045,9 +1045,7 @@ bool NormalOpenGLGraphics::calcWindow(ImageCollection *const vertCol,
     {
         vert = vertCol->currentVert;
     }
-
-    const Image *const *const grid = &imgRect.grid[0];
-    return calcImageRect(vert, x, y, w, h, imgRect);
+    calcImageRect(vert, x, y, w, h, imgRect);
 }
 
 void NormalOpenGLGraphics::updateScreen()
@@ -1559,6 +1557,14 @@ void NormalOpenGLGraphics::drawImageRect(const int x, const int y,
     #include "render/openglgraphics_drawImageRect.hpp"
 }
 
+void NormalOpenGLGraphics::calcImageRect(ImageVertexes *const vert,
+                                         const int x, const int y,
+                                         const int w, const int h,
+                                         const ImageRect &imgRect)
+{
+    #include "render/openglgraphics_calcImageRect.hpp"
+}
+
 #ifdef DEBUG_BIND_TEXTURE
 void NormalOpenGLGraphics::debugBindTexture(const Image *const image)
 {
diff --git a/src/render/normalopenglgraphics.h b/src/render/normalopenglgraphics.h
index 62d0fffb6..b88a073c3 100644
--- a/src/render/normalopenglgraphics.h
+++ b/src/render/normalopenglgraphics.h
@@ -115,6 +115,11 @@ class NormalOpenGLGraphics final : public Graphics
 
         void inline restoreColor();
 
+        void inline calcImageRect(ImageVertexes *const vert,
+                                  int x, int y,
+                                  int w, int h,
+                                  const ImageRect &imgRect);
+
         GLfloat *mFloatTexArray;
         GLint *mIntTexArray;
         GLint *mIntVertArray;
diff --git a/src/render/nullopenglgraphics.cpp b/src/render/nullopenglgraphics.cpp
index 3883d7134..3a59f44bc 100644
--- a/src/render/nullopenglgraphics.cpp
+++ b/src/render/nullopenglgraphics.cpp
@@ -859,7 +859,7 @@ void NullOpenGLGraphics::drawTileVertexes(const ImageVertexes *const vert)
     drawVertexes(vert->ogl);
 }
 
-bool NullOpenGLGraphics::calcWindow(ImageCollection *const vertCol,
+void NullOpenGLGraphics::calcWindow(ImageCollection *const vertCol,
                                     const int x, const int y,
                                     const int w, const int h,
                                     const ImageRect &imgRect)
@@ -867,7 +867,7 @@ bool NullOpenGLGraphics::calcWindow(ImageCollection *const vertCol,
     ImageVertexes *vert = nullptr;
     Image *const image = imgRect.grid[4];
     if (!image)
-        return false;
+        return;
     if (vertCol->currentGLImage != image->mGLImage)
     {
         vert = new ImageVertexes();
@@ -880,8 +880,7 @@ bool NullOpenGLGraphics::calcWindow(ImageCollection *const vertCol,
     {
         vert = vertCol->currentVert;
     }
-
-    return calcImageRect(vert, x, y, w, h, imgRect);
+    calcImageRect(vert, x, y, w, h, imgRect);
 }
 
 void NullOpenGLGraphics::updateScreen()
@@ -1147,6 +1146,14 @@ void NullOpenGLGraphics::drawImageRect(const int x, const int y,
     #include "render/openglgraphics_drawImageRect.hpp"
 }
 
+void NullOpenGLGraphics::calcImageRect(ImageVertexes *const vert,
+                                       const int x, const int y,
+                                       const int w, const int h,
+                                       const ImageRect &imgRect)
+{
+    #include "render/openglgraphics_calcImageRect.hpp"
+}
+
 #ifdef DEBUG_BIND_TEXTURE
 void NullOpenGLGraphics::debugBindTexture(const Image *const image)
 {
diff --git a/src/render/nullopenglgraphics.h b/src/render/nullopenglgraphics.h
index 35aa8d3de..bb18da05b 100644
--- a/src/render/nullopenglgraphics.h
+++ b/src/render/nullopenglgraphics.h
@@ -107,6 +107,11 @@ class NullOpenGLGraphics final : public Graphics
 
         void inline restoreColor();
 
+        void inline calcImageRect(ImageVertexes *const vert,
+                                  int x, int y,
+                                  int w, int h,
+                                  const ImageRect &imgRect);
+
         GLfloat *mFloatTexArray;
         GLint *mIntTexArray;
         GLint *mIntVertArray;
diff --git a/src/render/openglgraphics_calcImageRect.hpp b/src/render/openglgraphics_calcImageRect.hpp
new file mode 100644
index 000000000..403c85ba7
--- /dev/null
+++ b/src/render/openglgraphics_calcImageRect.hpp
@@ -0,0 +1,90 @@
+/*
+ *  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/>.
+ */
+
+
+//bool Graphics::calcImageRect(ImageVertexes *const vert,
+//                             const int x, const int y,
+//                             const int w, const int h,
+//                             const ImageRect &imgRect)
+
+if (!vert)
+    return;
+
+BLOCK_START("Graphics::calcImageRect")
+
+const Image *const *const grid = imgRect.grid;
+const Image *const topLeft = grid[0];
+const Image *const topRight = grid[2];
+const Image *const bottomLeft = grid[6];
+const Image *const bottomRight = grid[8];
+const Image *const top = grid[1];
+const Image *const right = grid[5];
+const Image *const bottom = grid[7];
+const Image *const left = grid[3];
+const Image *const center = grid[4];
+
+const bool drawMain = center && topLeft && topRight
+    && bottomLeft && bottomRight;
+
+// Draw the center area
+if (center && drawMain)
+{
+    const int tlw = topLeft->getWidth();
+    const int tlh = topLeft->getHeight();
+    calcPattern(vert, center, tlw + x, tlh + y,
+        w - tlw - topRight->getWidth(),
+        h - tlh - bottomLeft->getHeight());
+}
+// Draw the sides
+if (top && left && bottom && right)
+{
+    const int lw = left->getWidth();
+    const int rw = right->getWidth();
+    const int th = top->getHeight();
+    const int bh = bottom->getHeight();
+    calcPattern(vert, top, x + lw, y, w - lw - rw, th);
+    calcPattern(vert, bottom, x + lw, y + h - bh, w - lw - rw, bh);
+    calcPattern(vert, left, x, y + th, lw, h - th - bh);
+    if (w > rw)
+        calcPattern(vert, right, x + w - rw, y + th, rw, h - th - bh);
+}
+
+calcTileVertexes(vert, topLeft, x, y);
+if (topRight)
+{
+    const int trw = topRight->getWidth();
+    if (w > trw)
+        calcTileVertexes(vert, topRight, x + w - trw, y);
+}
+if (bottomLeft)
+    calcTileVertexes(vert, bottomLeft, x, y + h - bottomLeft->getHeight());
+if (bottomRight)
+{
+    const int brw = bottomRight->getWidth();
+    if (w > brw)
+    {
+        calcTileVertexes(vert, bottomRight, x + w - brw,
+            y + h - bottomRight->getHeight());
+    }
+}
+
+BLOCK_END("Graphics::calcImageRect")
diff --git a/src/render/openglgraphicsdef.hpp b/src/render/openglgraphicsdef.hpp
index f935f9062..e55deaacf 100644
--- a/src/render/openglgraphicsdef.hpp
+++ b/src/render/openglgraphicsdef.hpp
@@ -76,7 +76,7 @@
 
         void drawTileVertexes(const ImageVertexes *const vert) override final;
 
-        bool calcWindow(ImageCollection *const vertCol,
+        void calcWindow(ImageCollection *const vertCol,
                         const int x, const int y,
                         const int w, const int h,
                         const ImageRect &imgRect) override final;
diff --git a/src/render/safeopenglgraphics.cpp b/src/render/safeopenglgraphics.cpp
index 41d9b7f77..90dfe2e5b 100644
--- a/src/render/safeopenglgraphics.cpp
+++ b/src/render/safeopenglgraphics.cpp
@@ -397,12 +397,11 @@ void SafeOpenGLGraphics::updateScreen()
     BLOCK_END("Graphics::updateScreen")
 }
 
-bool SafeOpenGLGraphics::calcWindow(ImageCollection *const vertCol A_UNUSED,
+void SafeOpenGLGraphics::calcWindow(ImageCollection *const vertCol A_UNUSED,
                                     const int x A_UNUSED, const int y A_UNUSED,
                                     const int w A_UNUSED, const int h A_UNUSED,
                                     const ImageRect &imgRect A_UNUSED)
 {
-    return false;
 }
 
 void SafeOpenGLGraphics::_beginDraw()
@@ -668,4 +667,12 @@ void SafeOpenGLGraphics::drawImageRect(const int x, const int y,
     #include "render/openglgraphics_drawImageRect.hpp"
 }
 
+void SafeOpenGLGraphics::calcImageRect(ImageVertexes *const vert,
+                                       const int x, const int y,
+                                       const int w, const int h,
+                                       const ImageRect &imgRect)
+{
+    #include "render/openglgraphics_calcImageRect.hpp"
+}
+
 #endif  // USE_OPENGL
diff --git a/src/render/safeopenglgraphics.h b/src/render/safeopenglgraphics.h
index a6a32771c..5a8d7daa4 100644
--- a/src/render/safeopenglgraphics.h
+++ b/src/render/safeopenglgraphics.h
@@ -67,6 +67,11 @@ class SafeOpenGLGraphics final : public Graphics
 
         void inline restoreColor();
 
+        void inline calcImageRect(ImageVertexes *const vert,
+                                  int x, int y,
+                                  int w, int h,
+                                  const ImageRect &imgRect);
+
         bool mTexture;
         bool mIsByteColor;
         gcn::Color mByteColor;
diff --git a/src/render/sdl2graphics.cpp b/src/render/sdl2graphics.cpp
index a91548416..e1b8fecbc 100644
--- a/src/render/sdl2graphics.cpp
+++ b/src/render/sdl2graphics.cpp
@@ -550,7 +550,7 @@ bool SDLGraphics::drawNet(const int x1, const int y1,
     return true;
 }
 
-bool SDLGraphics::calcWindow(ImageCollection *const vertCol,
+void SDLGraphics::calcWindow(ImageCollection *const vertCol,
                              const int x, const int y,
                              const int w, const int h,
                              const ImageRect &imgRect)
@@ -569,9 +569,7 @@ bool SDLGraphics::calcWindow(ImageCollection *const vertCol,
     {
         vert = vertCol->currentVert;
     }
-
-    const Image *const *const grid = &imgRect.grid[0];
-    return calcImageRect(vert, x, y, w, h, imgRect);
+    calcImageRect(vert, x, y, w, h, imgRect);
 }
 
 void SDLGraphics::fillRectangle(const gcn::Rectangle &rectangle)
@@ -730,4 +728,12 @@ void SDLGraphics::drawImageRect(const int x, const int y,
     #include "render/openglgraphics_drawImageRect.hpp"
 }
 
+void SDLGraphics::calcImageRect(ImageVertexes *const vert,
+                                const int x, const int y,
+                                const int w, const int h,
+                                const ImageRect &imgRect)
+{
+    #include "render/openglgraphics_calcImageRect.hpp"
+}
+
 #endif  // USE_SDL2
diff --git a/src/render/sdl2graphics.h b/src/render/sdl2graphics.h
index 25a3a74b3..b7e430f16 100644
--- a/src/render/sdl2graphics.h
+++ b/src/render/sdl2graphics.h
@@ -115,7 +115,7 @@ class SDLGraphics final : public Graphics
                      const int x2, const int y2,
                      const int width, const int height) override final;
 
-        bool calcWindow(ImageCollection *const vertCol,
+        void calcWindow(ImageCollection *const vertCol,
                         const int x, const int y,
                         const int w, const int h,
                         const ImageRect &imgRect) override final;
@@ -162,6 +162,12 @@ class SDLGraphics final : public Graphics
         uint32_t mOldPixel;
         int mOldAlpha;
 
+    private:
+        void inline calcImageRect(ImageVertexes *const vert,
+                                  int x, int y,
+                                  int w, int h,
+                                  const ImageRect &imgRect);
+
 };
 
 #endif  // USE_SDL2
diff --git a/src/render/sdl2softwaregraphics.cpp b/src/render/sdl2softwaregraphics.cpp
index cbcc5f1cb..04be6b4fd 100644
--- a/src/render/sdl2softwaregraphics.cpp
+++ b/src/render/sdl2softwaregraphics.cpp
@@ -790,7 +790,7 @@ bool SDL2SoftwareGraphics::drawNet(const int x1, const int y1,
     return true;
 }
 
-bool SDL2SoftwareGraphics::calcWindow(ImageCollection *const vertCol,
+void SDL2SoftwareGraphics::calcWindow(ImageCollection *const vertCol,
                                       const int x, const int y,
                                       const int w, const int h,
                                       const ImageRect &imgRect)
@@ -809,9 +809,7 @@ bool SDL2SoftwareGraphics::calcWindow(ImageCollection *const vertCol,
     {
         vert = vertCol->currentVert;
     }
-
-    const Image *const *const grid = &imgRect.grid[0];
-    return calcImageRect(vert, x, y, w, h, imgRect);
+    calcImageRect(vert, x, y, w, h, imgRect);
 }
 
 int SDL2SoftwareGraphics::SDL_FakeUpperBlit(const SDL_Surface *const src,
@@ -1493,4 +1491,12 @@ void SDL2SoftwareGraphics::drawImageRect(const int x, const int y,
     #include "render/openglgraphics_drawImageRect.hpp"
 }
 
+void SDL2SoftwareGraphics::calcImageRect(ImageVertexes *const vert,
+                                         const int x, const int y,
+                                         const int w, const int h,
+                                         const ImageRect &imgRect)
+{
+    #include "render/openglgraphics_calcImageRect.hpp"
+}
+
 #endif  // USE_SDL2
diff --git a/src/render/sdl2softwaregraphics.h b/src/render/sdl2softwaregraphics.h
index f6f92a065..eda4e9e34 100644
--- a/src/render/sdl2softwaregraphics.h
+++ b/src/render/sdl2softwaregraphics.h
@@ -115,7 +115,7 @@ class SDL2SoftwareGraphics final : public Graphics
                      const int x2, const int y2,
                      const int width, const int height) override final;
 
-        bool calcWindow(ImageCollection *const vertCol,
+        void calcWindow(ImageCollection *const vertCol,
                         const int x, const int y,
                         const int w, const int h,
                         const ImageRect &imgRect) override final;
@@ -173,6 +173,13 @@ class SDL2SoftwareGraphics final : public Graphics
         SDL_Surface *mSurface;
         uint32_t mOldPixel;
         int mOldAlpha;
+
+    private:
+        void inline calcImageRect(ImageVertexes *const vert,
+                                  const int x, const int y,
+                                  const int w, const int h,
+                                  const ImageRect &imgRect);
+
 };
 
 #endif  // USE_SDL2
diff --git a/src/render/sdlgraphics.cpp b/src/render/sdlgraphics.cpp
index 2f13f53f0..ed2f08c4d 100644
--- a/src/render/sdlgraphics.cpp
+++ b/src/render/sdlgraphics.cpp
@@ -789,7 +789,7 @@ bool SDLGraphics::drawNet(const int x1, const int y1,
     return true;
 }
 
-bool SDLGraphics::calcWindow(ImageCollection *const vertCol,
+void SDLGraphics::calcWindow(ImageCollection *const vertCol,
                              const int x, const int y,
                              const int w, const int h,
                              const ImageRect &imgRect)
@@ -808,9 +808,7 @@ bool SDLGraphics::calcWindow(ImageCollection *const vertCol,
     {
         vert = vertCol->currentVert;
     }
-
-    const Image *const *const grid = &imgRect.grid[0];
-    return calcImageRect(vert, x, y, w, h, imgRect);
+    calcImageRect(vert, x, y, w, h, imgRect);
 }
 
 int SDLGraphics::SDL_FakeUpperBlit(const SDL_Surface *const src,
@@ -1472,4 +1470,12 @@ void SDLGraphics::drawImageRect(const int x, const int y,
     #include "render/openglgraphics_drawImageRect.hpp"
 }
 
+void SDLGraphics::calcImageRect(ImageVertexes *const vert,
+                                const int x, const int y,
+                                const int w, const int h,
+                                const ImageRect &imgRect)
+{
+    #include "render/openglgraphics_calcImageRect.hpp"
+}
+
 #endif  // USE_SDL2
diff --git a/src/render/sdlgraphics.h b/src/render/sdlgraphics.h
index 6fb1fd337..b66242f79 100644
--- a/src/render/sdlgraphics.h
+++ b/src/render/sdlgraphics.h
@@ -115,7 +115,7 @@ class SDLGraphics final : public Graphics
                      const int x2, const int y2,
                      const int width, const int height) override final;
 
-        bool calcWindow(ImageCollection *const vertCol,
+        void calcWindow(ImageCollection *const vertCol,
                         const int x, const int y,
                         const int w, const int h,
                         const ImageRect &imgRect) override final;
@@ -166,6 +166,13 @@ class SDLGraphics final : public Graphics
 
         uint32_t mOldPixel;
         int mOldAlpha;
+
+    private:
+        void inline calcImageRect(ImageVertexes *const vert,
+                                  int x, int y,
+                                  int w, int h,
+                                  const ImageRect &imgRect);
+
 };
 
 #endif  // USE_SDL2
diff --git a/src/render/surfacegraphics.h b/src/render/surfacegraphics.h
index 2973bc006..8d58fa052 100644
--- a/src/render/surfacegraphics.h
+++ b/src/render/surfacegraphics.h
@@ -146,11 +146,11 @@ class SurfaceGraphics final : public Graphics
                      const int height A_UNUSED) override final
         { return false; }
 
-        bool calcWindow(ImageCollection *const vertCol A_UNUSED,
+        void calcWindow(ImageCollection *const vertCol A_UNUSED,
                         const int x A_UNUSED, const int y A_UNUSED,
                         const int w A_UNUSED, const int h A_UNUSED,
                         const ImageRect &imgRect A_UNUSED) override final
-        { return false; }
+        { }
 
         void setBlitMode(const BlitMode mode)
         { mBlitMode = mode; }