1 files changed, 134 insertions, 0 deletions
diff --git a/src/resources/subimage.cpp b/src/resources/subimage.cpp
new file mode 100644
index 000000000..895bdc9a7
--- /dev/null
+++ b/src/resources/subimage.cpp
@@ -0,0 +1,134 @@
+/*
+ *  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 "resources/subimage.h"
+
+#ifdef USE_OPENGL
+#include "openglgraphics.h"
+#include "opengl1graphics.h"
+#endif
+
+#include "client.h"
+#include "main.h"
+
+#include "utils/stringutils.h"
+
+#include "debug.h"
+
+SubImage::SubImage(Image *parent, SDL_Surface *image,
+                   int x, int y, int width, int height):
+    Image(image),
+    mParent(parent)
+{
+    if (mParent)
+    {
+        mParent->incRef();
+        mParent->SDLTerminateAlphaCache();
+        mHasAlphaChannel = mParent->hasAlphaChannel();
+        mIsAlphaVisible = mHasAlphaChannel;
+        mAlphaChannel = mParent->SDLgetAlphaChannel();
+    }
+    else
+    {
+        mHasAlphaChannel = false;
+        mIsAlphaVisible = false;
+        mAlphaChannel = nullptr;
+    }
+
+    // Set up the rectangle.
+    mBounds.x = static_cast<short>(x);
+    mBounds.y = static_cast<short>(y);
+    mBounds.w = static_cast<Uint16>(width);
+    mBounds.h = static_cast<Uint16>(height);
+    if (mParent)
+    {
+        mInternalBounds.x = mParent->mBounds.x;
+        mInternalBounds.y = mParent->mBounds.y;
+        mInternalBounds.w = mParent->mBounds.w;
+        mInternalBounds.h = mParent->mBounds.h;
+    }
+    else
+    {
+        mInternalBounds.x = 0;
+        mInternalBounds.y = 0;
+        mInternalBounds.w = 1;
+        mInternalBounds.h = 1;
+    }
+    mUseAlphaCache = false;
+}
+
+#ifdef USE_OPENGL
+SubImage::SubImage(Image *parent, GLuint image,
+                   int x, int y, int width, int height,
+                   int texWidth, int texHeight):
+    Image(image, width, height, texWidth, texHeight),
+    mParent(parent)
+{
+    if (mParent)
+        mParent->incRef();
+
+    // Set up the rectangle.
+    mBounds.x = static_cast<short>(x);
+    mBounds.y = static_cast<short>(y);
+    mBounds.w = static_cast<Uint16>(width);
+    mBounds.h = static_cast<Uint16>(height);
+    if (mParent)
+    {
+        mInternalBounds.x = mParent->mBounds.x;
+        mInternalBounds.y = mParent->mBounds.y;
+        mInternalBounds.w = mParent->mBounds.w;
+        mInternalBounds.h = mParent->mBounds.h;
+    }
+    else
+    {
+        mInternalBounds.x = 0;
+        mInternalBounds.y = 0;
+        mInternalBounds.w = 1;
+        mInternalBounds.h = 1;
+    }
+    mIsAlphaVisible = mHasAlphaChannel;
+}
+#endif
+
+SubImage::~SubImage()
+{
+    // Avoid destruction of the image
+    mSDLSurface = nullptr;
+    // Avoid possible destruction of its alpha channel
+    mAlphaChannel = nullptr;
+#ifdef USE_OPENGL
+    mGLImage = 0;
+#endif
+    if (mParent)
+    {
+        mParent->decRef();
+        mParent = nullptr;
+    }
+}
+
+Image *SubImage::getSubImage(int x, int y, int w, int h)
+{
+    if (mParent)
+        return mParent->getSubImage(mBounds.x + x, mBounds.y + y, w, h);
+    else
+        return nullptr;
+}