--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/engine/core/view/renderers/camerazonerenderer.cpp	Sun Jun 29 18:44:17 2008 +0000
@@ -0,0 +1,137 @@
+/***************************************************************************
+ *   Copyright (C) 2005-2008 by the FIFE team                              *
+ *   http://www.fifengine.de                                               *
+ *   This file is part of FIFE.                                            *
+ *                                                                         *
+ *   FIFE 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     *
+ *   (at your option) 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, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA              *
+ ***************************************************************************/
+
+// Standard C++ library includes
+
+// 3rd party library includes
+
+// FIFE includes
+// These includes are split up in two parts, separated by one empty line
+// First block: files included from the FIFE root src directory
+// Second block: files included from the same folder
+#include "video/renderbackend.h"
+#include "video/image.h"
+#include "util/math/fife_math.h"
+#include "util/log/logger.h"
+#include "model/metamodel/grids/cellgrid.h"
+#include "model/structures/instance.h"
+#include "model/structures/layer.h"
+#include "model/structures/location.h"
+
+#include "view/camera.h"
+#include "camerazonerenderer.h"
+
+
+
+namespace FIFE {
+	static Logger _log(LM_VIEWVIEW);
+
+	CameraZoneRenderer::CameraZoneRenderer(RenderBackend* renderbackend, int position, ImagePool* imagepool):
+		RendererBase(renderbackend, position),
+		m_imagepool(imagepool),
+		m_zone_image(NULL) {
+		setEnabled(false);
+	}
+
+	CameraZoneRenderer::CameraZoneRenderer(const CameraZoneRenderer& old):
+		RendererBase(old),
+		m_imagepool(old.m_imagepool),
+		m_zone_image(NULL) {
+		setEnabled(false);
+	}
+
+	RendererBase* CameraZoneRenderer::clone() {
+		return new CameraZoneRenderer(*this);
+	}
+
+	CameraZoneRenderer::~CameraZoneRenderer() {
+		delete m_zone_image;
+	}
+
+
+
+	void CameraZoneRenderer::render(Camera* cam, Layer* layer, std::vector<Instance*>& instances) {
+		CellGrid* cg = layer->getCellGrid();
+		if (!cg) {
+			FL_WARN(_log, "No cellgrid assigned to layer, cannot draw camera zones");
+			return;
+		}
+		// draw this layer's grid as the camera sees it
+		Rect rect = cam->getViewPort();
+		if (!m_zone_image) {
+			// build zone image
+			int dataSize = rect.w * rect.h;
+
+			// initally all pixels are transparent
+			uint32_t* data = new uint32_t[dataSize];
+			uint32_t* end = data + dataSize;
+
+			#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+				uint32_t empty_pixel = 0;//0xff << 24;
+				uint32_t edge_pixel = 0xff << 16 | 0xff << 24;
+			#else
+				uint32_t empty_pixel = 0;//0xff;
+				uint32_t edge_pixel = 0xff << 8 | 0xff;
+			#endif
+
+			std::fill(data, end, empty_pixel);
+
+			// go from screen coords to grid coords (layer coords)
+			// Search through pixel space, drawing pixels at boundaries
+			ModelCoordinate prevLayerCoord;
+			for (int y = 0; y < rect.h; y++) {
+				for (int x = 0; x < rect.w; x++) {
+					ExactModelCoordinate mapCoord = cam->toMapCoordinates(ScreenPoint(x, y));
+					ModelCoordinate layerCoord = cg->toLayerCoordinates(mapCoord);
+
+					if (prevLayerCoord != layerCoord) {
+						data[x + rect.w * y] = edge_pixel;
+					}
+					prevLayerCoord = layerCoord;
+				}
+			}
+
+
+			for (int x = 0; x < rect.w; x++) {
+				for (int y = 0; y < rect.h; y++) {
+					ExactModelCoordinate mapCoord = cam->toMapCoordinates(ScreenPoint(x, y));
+					ModelCoordinate layerCoord = cg->toLayerCoordinates(mapCoord);
+
+					if (prevLayerCoord != layerCoord) {
+						data[x + rect.w * y] = edge_pixel;
+					}
+					prevLayerCoord = layerCoord;
+				}
+			}
+
+			m_zone_image =  m_renderbackend->createImage((uint8_t*) data, rect.w, rect.h);
+			delete data;
+		}
+		m_zone_image->render(rect);
+	}
+
+	void CameraZoneRenderer::setEnabled(bool enabled) {
+		if (!enabled) {
+			delete m_zone_image;
+			m_zone_image = NULL;
+		}
+	}
+}