Add minimap feature

src/minimap.h

@@ -0,0 +1,168 @@
+/*
+Minetest
+Copyright (C) 2010-2015 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef MINIMAP_HEADER
+#define MINIMAP_HEADER
+
+#include "irrlichttypes_extrabloated.h"
+#include "client.h"
+#include "voxel.h"
+#include "jthread/jmutex.h"
+#include <map>
+#include <string>
+#include <vector>
+
+enum MinimapMode {
+	MINIMAP_MODE_OFF,
+	MINIMAP_MODE_SURFACEx1,
+	MINIMAP_MODE_SURFACEx2,
+	MINIMAP_MODE_SURFACEx4,
+	MINIMAP_MODE_RADARx1,
+	MINIMAP_MODE_RADARx2,
+	MINIMAP_MODE_RADARx4
+};
+
+struct MinimapPixel
+{
+	u16 id;
+	u16 height;
+	u16 air_count;
+	u16 light;
+};
+
+struct MinimapMapblock
+{
+	MinimapPixel data[MAP_BLOCKSIZE * MAP_BLOCKSIZE];
+};
+
+struct MinimapData
+{
+	bool radar;
+	MinimapMode mode;
+	v3s16 pos;
+	v3s16 old_pos;
+	u16 scan_height;
+	u16 map_size;
+	MinimapPixel minimap_scan[512 * 512];
+	bool map_invalidated;
+	bool minimap_shape_round;
+	video::IImage *minimap_image;
+	video::IImage *heightmap_image;
+	video::IImage *minimap_mask_round;
+	video::IImage *minimap_mask_square;
+	video::ITexture *texture;
+	video::ITexture *heightmap_texture;
+	video::ITexture *minimap_overlay_round;
+	video::ITexture *minimap_overlay_square;
+	video::ITexture *player_marker;
+};
+
+struct QueuedMinimapUpdate
+{
+	v3s16 pos;
+	MinimapMapblock *data;
+
+	QueuedMinimapUpdate();
+	~QueuedMinimapUpdate();
+};
+
+/*
+	A thread-safe queue of minimap mapblocks update tasks
+*/
+
+class MinimapUpdateQueue
+{
+public:
+	MinimapUpdateQueue();
+
+	~MinimapUpdateQueue();
+
+	void addBlock(v3s16 pos, MinimapMapblock *data);
+
+	QueuedMinimapUpdate *pop();
+
+	u32 size()
+	{
+		JMutexAutoLock lock(m_mutex);
+		return m_queue.size();
+	}
+
+private:
+	std::vector<QueuedMinimapUpdate*> m_queue;
+	JMutex m_mutex;
+};
+
+class MinimapUpdateThread : public JThread
+{
+private:
+
+public:
+	MinimapUpdateThread(IrrlichtDevice *device, Client *client)
+	{
+		this->device = device;
+		this->client = client;
+		this->driver = device->getVideoDriver();
+		this->tsrc = client->getTextureSource();
+	}
+	void getMap (v3s16 pos, s16 size, s16 height, bool radar);
+	MinimapPixel *getMinimapPixel (v3s16 pos, s16 height, s16 &pixel_height);
+	s16 getAirCount (v3s16 pos, s16 height);
+	video::SColor getColorFromId(u16 id);
+	IrrlichtDevice *device;
+	Client *client;
+	video::IVideoDriver *driver;
+	ITextureSource *tsrc;
+	void *Thread();
+	MinimapData *data;
+	MinimapUpdateQueue m_queue;
+	std::map<v3s16, MinimapMapblock *> m_blocks_cache;
+};
+
+class Mapper
+{
+private:
+	MinimapUpdateThread *m_minimap_update_thread;
+	video::ITexture *minimap_texture;
+	scene::SMeshBuffer *m_meshbuffer;
+	bool m_enable_shaders;
+	JMutex m_mutex;
+
+public:
+	Mapper(IrrlichtDevice *device, Client *client);
+	~Mapper();
+
+	void addBlock(v3s16 pos, MinimapMapblock *data);
+	void setPos(v3s16 pos);
+	video::ITexture* getMinimapTexture();
+	v3f getYawVec();
+	MinimapMode getMinimapMode();
+	void setMinimapMode(MinimapMode mode);
+	void toggleMinimapShape();
+	scene::SMeshBuffer *getMinimapMeshBuffer();
+	void drawMinimap();
+	IrrlichtDevice *device;
+	Client *client;
+	video::IVideoDriver *driver;
+	LocalPlayer *player;
+	ITextureSource *tsrc;
+	IShaderSource *shdrsrc;
+	MinimapData *data;
+};
+
+#endif