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source: GTP/trunk/App/Demos/Geom/OgreStuff/include/OgreCEGUIRenderer.h @ 1092

Revision 1092, 14.9 KB checked in by gumbau, 18 years ago (diff)
LodStrips? and LODTrees demos

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1	/************************************************************************
2	filename: OgreCEGUIRenderer.h
3	created: 11/5/2004
4	author: Paul D Turner
5
6	purpose: Interface for main Ogre GUI renderer class
7	*************************************************************************/
8	/*************************************************************************
9	Crazy Eddie's GUI System (http://www.cegui.org.uk)
10	Copyright (C)2004 - 2005 Paul D Turner (paul@cegui.org.uk)
11
12	This library is free software; you can redistribute it and/or
13	modify it under the terms of the GNU Lesser General Public
14	License as published by the Free Software Foundation; either
15	version 2.1 of the License, or (at your option) any later version.
16
17	This library is distributed in the hope that it will be useful,
18	but WITHOUT ANY WARRANTY; without even the implied warranty of
19	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	Lesser General Public License for more details.
21
22	You should have received a copy of the GNU Lesser General Public
23	License along with this library; if not, write to the Free Software
24	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25	*************************************************************************/
26	/*************************************************************************
27	This file contains code that is specific to Ogre (http://www.ogre3d.org)
28	*************************************************************************/
29	#ifndef _OgreCEGUIRenderer_h_
30	#define _OgreCEGUIRenderer_h_
31
32	#if defined( __WIN32__ ) \|\| defined( _WIN32 )
33	# ifdef OGRE_GUIRENDERER_EXPORTS
34	# define OGRE_GUIRENDERER_API __declspec(dllexport)
35	# else
36	# define OGRE_GUIRENDERER_API __declspec(dllimport)
37	# endif
38	#else
39	# define OGRE_GUIRENDERER_API
40	#endif
41
42	#include <CEGUI/CEGUIBase.h>
43	#include <CEGUI/CEGUIRenderer.h>
44	#include <CEGUI/CEGUITexture.h>
45
46	#include <OgreRenderQueueListener.h>
47	#include <OgreSceneManagerEnumerator.h>
48
49	// Start of CEGUI namespace section
50	namespace CEGUI
51	{
52	/*************************************************************************
53	Forward refs
54	*************************************************************************/
55	class OgreCEGUITexture;
56	class OgreCEGUIRenderer;
57
58
59	/*!
60	\brief
61	RenderQueueListener based class used to hook into the ogre rendering system
62	*/
63	class CEGUIRQListener : public Ogre::RenderQueueListener
64	{
65	public:
66	CEGUIRQListener(OgreCEGUIRenderer* renderer, Ogre::RenderQueueGroupID queue_id, bool post_queue)
67	{
68	d_renderer = renderer;
69	d_queue_id = queue_id;
70	d_post_queue = post_queue;
71	}
72
73	virtual ~CEGUIRQListener() {}
74
75	virtual void renderQueueStarted(Ogre::RenderQueueGroupID id, bool& skipThisQueue);
76	virtual void renderQueueEnded(Ogre::RenderQueueGroupID id, bool& repeatThisQueue);
77
78	// methods for adjusting target queue settings
79	void setTargetRenderQueue(Ogre::RenderQueueGroupID queue_id) {d_queue_id = queue_id;}
80	void setPostRenderQueue(bool post_queue) {d_post_queue = post_queue;}
81
82	private:
83	/*************************************************************************
84	Implementation Data
85	*************************************************************************/
86	OgreCEGUIRenderer* d_renderer; //!< CEGUI renderer object for Ogre.
87	Ogre::RenderQueueGroupID d_queue_id; //!< ID of the queue that we are hooked into
88	bool d_post_queue; //!< true if we render after everything else in our queue.
89	};
90
91
92	/*!
93	\brief
94	Renderer class to interface with Ogre engine.
95	*/
96	class OGRE_GUIRENDERER_API OgreCEGUIRenderer : public Renderer
97	{
98	public:
99	/*!
100	\brief
101	Constructor for renderer class that uses Ogre for rendering.
102
103	\param window
104	Pointer to an Ogre::RenderWindow object.
105
106	\param queue_id
107	Ogre::RenderQueueGroupID value that specifies where the GUI should appear in the ogre rendering output.
108
109	\param post_queue
110	set to true to have GUI rendered after render queue \a queue_id, or false to have the GUI rendered before render queue
111	\a queue_id.
112
113	\param max_quads
114	Obsolete. Set to 0.
115
116	\param scene_type
117	One of the Ogre::SceneType enumerated values specifying the scene manager to be targeted by the GUI renderer.
118	*/
119	OgreCEGUIRenderer(Ogre::RenderWindow* window, Ogre::RenderQueueGroupID queue_id = Ogre::RENDER_QUEUE_OVERLAY, bool post_queue = false, uint max_quads = 0, Ogre::SceneType scene_type = Ogre::ST_GENERIC);
120
121
122	/*!
123	\brief
124	Constructor for renderer class that uses Ogre for rendering.
125
126	\param window
127	Pointer to an Ogre::RenderWindow object.
128
129	\param queue_id
130	Ogre::RenderQueueGroupID value that specifies where the GUI should appear in the ogre rendering output.
131
132	\param post_queue
133	set to true to have GUI rendered after render queue \a queue_id, or false to have the GUI rendered before render queue
134	\a queue_id.
135
136	\param max_quads
137	Obsolete. Set to 0.
138
139	\param scene_manager
140	Pointer to an Ogre::SceneManager object that is to be used for GUI rendering.
141	*/
142	OgreCEGUIRenderer(Ogre::RenderWindow* window, Ogre::RenderQueueGroupID queue_id, bool post_queue, uint max_quads, Ogre::SceneManager* scene_manager);
143
144
145	/*!
146	\brief
147	Destructor for Ogre renderer.
148	*/
149	virtual ~OgreCEGUIRenderer(void);
150
151
152
153	// add's a quad to the list to be rendered
154	virtual void addQuad(const Rect& dest_rect, float z, const Texture* tex, const Rect& texture_rect, const ColourRect& colours, QuadSplitMode quad_split_mode);
155
156	// perform final rendering for all queued renderable quads.
157	virtual void doRender(void);
158
159	// clear the queue
160	virtual void clearRenderList(void);
161
162
163	/*!
164	\brief
165	Enable or disable the queueing of quads from this point on.
166
167	This only affects queueing. If queueing is turned off, any calls to addQuad will cause the quad to be rendered directly. Note that
168	disabling queueing will not cause currently queued quads to be rendered, nor is the queue cleared - at any time the queue can still
169	be drawn by calling doRender, and the list can be cleared by calling clearRenderList. Re-enabling the queue causes subsequent quads
170	to be added as if queueing had never been disabled.
171
172	\param setting
173	true to enable queueing, or false to disable queueing (see notes above).
174
175	\return
176	Nothing
177	*/
178	virtual void setQueueingEnabled(bool setting) {d_queueing = setting;}
179
180
181	// create an empty texture
182	virtual Texture* createTexture(void);
183
184	// create a texture and load it with the specified file.
185	virtual Texture* createTexture(const String& filename, const String& resourceGroup = "General");
186
187	// create a texture and set it to the specified size
188	virtual Texture* createTexture(float size);
189
190	// create an OGRE resource provider.
191	virtual ResourceProvider* createResourceProvider(void);
192
193	// destroy the given texture
194	virtual void destroyTexture(Texture* texture);
195
196	// destroy all textures still active
197	virtual void destroyAllTextures(void);
198
199
200	/*!
201	\brief
202	Return whether queueing is enabled.
203
204	\return
205	true if queueing is enabled, false if queueing is disabled.
206	*/
207	virtual bool isQueueingEnabled(void) const {return d_queueing;}
208
209
210	/*!
211	\brief
212	Return the current width of the display in pixels
213
214	\return
215	float value equal to the current width of the display in pixels.
216	*/
217	virtual float getWidth(void) const {return d_display_area.getWidth();}
218
219
220	/*!
221	\brief
222	Return the current height of the display in pixels
223
224	\return
225	float value equal to the current height of the display in pixels.
226	*/
227	virtual float getHeight(void) const {return d_display_area.getHeight();}
228
229
230	/*!
231	\brief
232	Return the size of the display in pixels
233
234	\return
235	Size object describing the dimensions of the current display.
236	*/
237	virtual Size getSize(void) const {return d_display_area.getSize();}
238
239
240	/*!
241	\brief
242	Return a Rect describing the screen
243
244	\return
245	A Rect object that describes the screen area. Typically, the top-left values are always 0, and the size of the area described is
246	equal to the screen resolution.
247	*/
248	virtual Rect getRect(void) const {return d_display_area;}
249
250
251	/*!
252	\brief
253	Return the maximum texture size available
254
255	\return
256	Size of the maximum supported texture in pixels (textures are always assumed to be square)
257	*/
258	virtual uint getMaxTextureSize(void) const {return 2048;} // TODO: Change to proper value
259
260
261	/*!
262	\brief
263	Return the horizontal display resolution dpi
264
265	\return
266	horizontal resolution of the display in dpi.
267	*/
268	virtual uint getHorzScreenDPI(void) const {return 96;}
269
270
271	/*!
272	\brief
273	Return the vertical display resolution dpi
274
275	\return
276	vertical resolution of the display in dpi.
277	*/
278	virtual uint getVertScreenDPI(void) const {return 96;}
279
280
281	/*!
282	\brief
283	Set the scene manager to be used for rendering the GUI.
284
285	The GUI system will be unhooked from the current scene manager and attached to what ever
286	is specified here.
287
288	\param scene_type
289	One of the Ogre::SceneType enumerated values indicating the new target Ogre::SceneManager to be
290	used for GUI rendering.
291
292	\return
293	Nothing.
294	*/
295	void setTargetSceneManager(Ogre::SceneType scene_type);
296
297
298	/*!
299	\brief
300	Set the scene manager to be used for rendering the GUI.
301
302	The GUI system will be unhooked from the current scene manager and attached to what ever
303	is specified here.
304
305	\param scene_manager
306	Pointer to an Ogre::SceneManager object that is the new target Ogre::SceneManager to be
307	used for GUI rendering.
308
309	\return
310	Nothing.
311	*/
312	void setTargetSceneManager(Ogre::SceneManager* scene_manager);
313
314
315	/*!
316	\brief
317	Set the target render queue for GUI rendering.
318
319	\param queue_id
320	Ogre::RenderQueueGroupID value specifying the render queue that the GUI system should attach to.
321
322	\param post_queue
323	- true to specify that the GUI should render after everything else in render queue \a queue_id.
324	- false to specify the GUI should render before everything else in render queue \a queue_id.
325
326	\return
327	Nothing.
328	*/
329	void setTargetRenderQueue(Ogre::RenderQueueGroupID queue_id, bool post_queue);
330
331
332	/*!
333	\brief
334	Create a texture from an existing Ogre::TexturePtr object.
335
336	\note
337	If you want to use an Ogre::RenderTexture (for putting rendered output onto Gui elements or other
338	advanced techniques), you can get the Ogre::TexturePtr to be used by calling Ogre::TextureManager::getByName()
339	passing the name returned from Ogre::RenderTexture::getName() (and casting the result as necessary).
340
341	\param texture
342	pointer to an Ogre::TexturePtr object to be used as the basis for the new CEGUI::Texture
343
344	\return
345	Pointer to the newly created CEGUI::TexturePtr object.
346	*/
347	Texture* createTexture(Ogre::TexturePtr& texture);
348
349
350	private:
351	/************************************************************************
352	Implementation Constants
353	************************************************************************/
354	static const size_t VERTEX_PER_QUAD; //!< number of vertices per quad
355	static const size_t VERTEX_PER_TRIANGLE; //!< number of vertices for a triangle
356	static const size_t VERTEXBUFFER_INITIAL_CAPACITY; //!< initial capacity of the allocated vertex buffer
357	static const size_t UNDERUSED_FRAME_THRESHOLD; //!< number of frames to wait before shrinking buffer
358
359	/*************************************************************************
360	Implementation Structs & classes
361	*************************************************************************/
362	/*!
363	\brief
364	structure used for all vertices.
365	*/
366	struct QuadVertex {
367	float x, y, z; //!< The position for the vertex.
368	Ogre::RGBA diffuse; //!< colour of the vertex
369	float tu1, tv1; //!< texture coordinates
370	};
371
372	/*!
373	\brief
374	structure holding details about a quad to be drawn
375	*/
376	struct QuadInfo
377	{
378	Ogre::TexturePtr texture;
379	Rect position;
380	float z;
381	Rect texPosition;
382	uint32 topLeftCol;
383	uint32 topRightCol;
384	uint32 bottomLeftCol;
385	uint32 bottomRightCol;
386
387	QuadSplitMode splitMode;
388
389	bool operator<(const QuadInfo& other) const
390	{
391	// this is intentionally reversed.
392	return z > other.z;
393	}
394	};
395
396
397	/*************************************************************************
398	Implementation Methods
399	*************************************************************************/
400	// setup states etc
401	void initRenderStates(void);
402
403	// sort quads list according to texture
404	void sortQuads(void);
405
406	// render a quad directly to the display
407	void renderQuadDirect(const Rect& dest_rect, float z, const Texture* tex, const Rect& texture_rect, const ColourRect& colours, QuadSplitMode quad_split_mode);
408
409	// convert colour value to whatever the Ogre render system is expecting.
410	uint32 colourToOgre(const colour& col) const;
411
412	// perform main work of the constructor. This does everything except the final hook into the render system.
413	void constructor_impl(Ogre::RenderWindow* window, Ogre::RenderQueueGroupID queue_id, bool post_queue, uint max_quads);
414
415
416	/*************************************************************************
417	Implementation Data
418	*************************************************************************/
419	Rect d_display_area;
420
421	typedef std::multiset<QuadInfo> QuadList;
422	QuadList d_quadlist;
423	bool d_queueing; //!< setting for queueing control.
424
425	// Ogre specific bits.
426	Ogre::Root* d_ogre_root; //!< pointer to the Ogre root object that we attach to
427	Ogre::RenderSystem* d_render_sys; //!< Pointer to the render system for Ogre.
428	Ogre::RenderQueueGroupID d_queue_id; //!< ID of the queue that we are hooked into
429	Ogre::TexturePtr d_currTexture; //!< currently set texture;
430	Ogre::RenderOperation d_render_op; //!< Ogre render operation we use to do our stuff.
431	Ogre::HardwareVertexBufferSharedPtr d_buffer; //!< vertex buffer to queue sprite rendering
432	size_t d_underused_framecount; //!< Number of frames elapsed since buffer utilization was above half the capacity
433	Ogre::RenderOperation d_direct_render_op; //!< Renderop for cursor
434	Ogre::HardwareVertexBufferSharedPtr d_direct_buffer; //!< Renderop for cursor
435	Ogre::SceneManager* d_sceneMngr; //!< The scene manager we are hooked into.
436	Ogre::LayerBlendModeEx d_colourBlendMode; //!< Controls colour blending mode used.
437	Ogre::LayerBlendModeEx d_alphaBlendMode; //!< Controls alpha blending mode used.
438
439	CEGUIRQListener* d_ourlistener;
440	bool d_post_queue; //!< true if we render after everything else in our queue.
441	size_t d_bufferPos; //!< index into buffer where next vertex should be put.
442	bool d_sorted; //!< true when data in quad list is sorted.
443	Point d_texelOffset; //!< Offset required for proper texel mapping.
444
445	std::list<OgreCEGUITexture*> d_texturelist; //!< List used to track textures.
446	};
447
448	} // End of CEGUI namespace section
449
450
451	#endif // end of guard _OgreCEGUIRenderer_h_

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