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-rw-r--r--src/render/graphics.cpp124
1 files changed, 123 insertions, 1 deletions
diff --git a/src/render/graphics.cpp b/src/render/graphics.cpp
index 7e3687006..653b4d4c0 100644
--- a/src/render/graphics.cpp
+++ b/src/render/graphics.cpp
@@ -20,6 +20,49 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+/* _______ __ __ __ ______ __ __ _______ __ __
+ * / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___ /\ / |\/ /\
+ * / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
+ * / / /__ / / // / // / // / / / ___ / // ___ / // /| ' / /
+ * / /_// /\ / /_// / // / // /_/_ / / // / // /\_/ / // / | / /
+ * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
+ * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
+ *
+ * Copyright (c) 2004 - 2008 Olof Naessén and Per Larsson
+ *
+ *
+ * Per Larsson a.k.a finalman
+ * Olof Naessén a.k.a jansem/yakslem
+ *
+ * Visit: http://guichan.sourceforge.net
+ *
+ * License: (BSD)
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name of Guichan nor the names of its contributors may
+ * be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
#include "render/graphics.h"
#include "main.h"
@@ -48,11 +91,11 @@
Graphics *mainGraphics = nullptr;
Graphics::Graphics() :
- gcn::Graphics(),
mWidth(0),
mHeight(0),
mActualWidth(0),
mActualHeight(0),
+ mClipStack(),
mWindow(nullptr),
#ifdef USE_SDL2
mRenderer(nullptr),
@@ -503,3 +546,82 @@ void Graphics::setWindowSize(const int width A_UNUSED,
SDL_SetWindowSize(mWindow, width, height);
#endif
}
+
+bool Graphics::pushClipArea(gcn::Rectangle area)
+{
+ // Ignore area with a negate width or height
+ // by simple pushing an empty clip area
+ // to the stack.
+ if (area.width < 0 || area.height < 0)
+ {
+ gcn::ClipRectangle carea;
+ mClipStack.push(carea);
+ return true;
+ }
+
+ if (mClipStack.empty())
+ {
+ gcn::ClipRectangle carea;
+ carea.x = area.x;
+ carea.y = area.y;
+ carea.width = area.width;
+ carea.height = area.height;
+ carea.xOffset = area.x;
+ carea.yOffset = area.y;
+ mClipStack.push(carea);
+ return true;
+ }
+
+ const gcn::ClipRectangle &top = mClipStack.top();
+ gcn::ClipRectangle carea;
+ carea = area;
+ carea.xOffset = top.xOffset + carea.x;
+ carea.yOffset = top.yOffset + carea.y;
+ carea.x += top.xOffset;
+ carea.y += top.yOffset;
+
+ // Clamp the pushed clip rectangle.
+ if (carea.x < top.x)
+ carea.x = top.x;
+
+ if (carea.y < top.y)
+ carea.y = top.y;
+
+ if (carea.x + carea.width > top.x + top.width)
+ {
+ carea.width = top.x + top.width - carea.x;
+
+ if (carea.width < 0)
+ carea.width = 0;
+ }
+
+ if (carea.y + carea.height > top.y + top.height)
+ {
+ carea.height = top.y + top.height - carea.y;
+
+ if (carea.height < 0)
+ carea.height = 0;
+ }
+
+ const bool result = carea.isIntersecting(top);
+
+ mClipStack.push(carea);
+
+ return result;
+}
+
+void Graphics::popClipArea()
+{
+ if (mClipStack.empty())
+ return;
+
+ mClipStack.pop();
+}
+
+const gcn::ClipRectangle *Graphics::getCurrentClipArea() const
+{
+ if (mClipStack.empty())
+ return nullptr;
+
+ return &mClipStack.top();
+}