summaryrefslogtreecommitdiff
path: root/indra/media_plugins/example/media_plugin_example.cpp
blob: f5b077fea037410a80d4643fb11328c8231aacad (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
/**
 * @file media_plugin_example.cpp
 * @brief Example plugin for LLMedia API plugin system
 *
 * @cond
 * $LicenseInfo:firstyear=2008&license=viewergpl$
 *
 * Copyright (c) 2009, Linden Research, Inc.
 *
 * Second Life Viewer Source Code
 * The source code in this file ("Source Code") is provided by Linden Lab
 * to you under the terms of the GNU General Public License, version 2.0
 * ("GPL"), unless you have obtained a separate licensing agreement
 * ("Other License"), formally executed by you and Linden Lab.  Terms of
 * the GPL can be found in doc/GPL-license.txt in this distribution, or
 * online at http://secondlife.com/developers/opensource/gplv2
 *
 * There are special exceptions to the terms and conditions of the GPL as
 * it is applied to this Source Code. View the full text of the exception
 * in the file doc/FLOSS-exception.txt in this software distribution, or
 * online at http://secondlife.com/developers/opensource/flossexception
 *
 * By copying, modifying or distributing this software, you acknowledge
 * that you have read and understood your obligations described above,
 * and agree to abide by those obligations.
 *
 * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
 * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
 * COMPLETENESS OR PERFORMANCE.
 * $/LicenseInfo$
 * @endcond
 */

#include "linden_common.h"

#include "llgl.h"
#include "llplugininstance.h"
#include "llpluginmessage.h"
#include "llpluginmessageclasses.h"
#include "media_plugin_base.h"

#include <time.h>

////////////////////////////////////////////////////////////////////////////////
//
class MediaPluginExample :
		public MediaPluginBase
{
	public:
		MediaPluginExample( LLPluginInstance::sendMessageFunction host_send_func, void *host_user_data );
		~MediaPluginExample();

		/*virtual*/ void receiveMessage( const char* message_string );

	private:
		bool init();
		void update( F64 milliseconds );
		void write_pixel( int x, int y, unsigned char r, unsigned char g, unsigned char b );
		bool mFirstTime;

		time_t mLastUpdateTime;
		enum Constants { ENumObjects = 10 };
		unsigned char* mBackgroundPixels;
		int mColorR[ ENumObjects ];
		int mColorG[ ENumObjects ];
		int mColorB[ ENumObjects ];
		int mXpos[ ENumObjects ];
		int mYpos[ ENumObjects ];
		int mXInc[ ENumObjects ];
		int mYInc[ ENumObjects ];
		int mBlockSize[ ENumObjects ];
		bool mMouseButtonDown;
		bool mStopAction;
};

////////////////////////////////////////////////////////////////////////////////
//
MediaPluginExample::MediaPluginExample( LLPluginInstance::sendMessageFunction host_send_func, void *host_user_data ) :
	MediaPluginBase( host_send_func, host_user_data )
{
	mFirstTime = true;
	mWidth = 0;
	mHeight = 0;
	mDepth = 4;
	mPixels = 0;
	mMouseButtonDown = false;
	mStopAction = false;
	mLastUpdateTime = 0;
}

////////////////////////////////////////////////////////////////////////////////
//
MediaPluginExample::~MediaPluginExample()
{
}

////////////////////////////////////////////////////////////////////////////////
//
void MediaPluginExample::receiveMessage( const char* message_string )
{
	LLPluginMessage message_in;

	if ( message_in.parse( message_string ) >= 0 )
	{
		std::string message_class = message_in.getClass();
		std::string message_name = message_in.getName();

		if ( message_class == LLPLUGIN_MESSAGE_CLASS_BASE )
		{
			if ( message_name == "init" )
			{
				LLPluginMessage message( "base", "init_response" );
				LLSD versions = LLSD::emptyMap();
				versions[ LLPLUGIN_MESSAGE_CLASS_BASE ] = LLPLUGIN_MESSAGE_CLASS_BASE_VERSION;
				versions[ LLPLUGIN_MESSAGE_CLASS_MEDIA ] = LLPLUGIN_MESSAGE_CLASS_MEDIA_VERSION;
				versions[ LLPLUGIN_MESSAGE_CLASS_MEDIA_BROWSER ] = LLPLUGIN_MESSAGE_CLASS_MEDIA_BROWSER_VERSION;
				message.setValueLLSD( "versions", versions );

				std::string plugin_version = "Example media plugin, Example Version 1.0.0.0";
				message.setValue( "plugin_version", plugin_version );
				sendMessage( message );

				// Plugin gets to decide the texture parameters to use.
				message.setMessage( LLPLUGIN_MESSAGE_CLASS_MEDIA, "texture_params" );
				message.setValueS32( "default_width", mWidth );
				message.setValueS32( "default_height", mHeight );
				message.setValueS32( "depth", mDepth );
				message.setValueU32( "internalformat", GL_RGBA );
				message.setValueU32( "format", GL_RGBA );
				message.setValueU32( "type", GL_UNSIGNED_BYTE );
				message.setValueBoolean( "coords_opengl", false );
				sendMessage( message );
			}
			else
			if ( message_name == "idle" )
			{
				// no response is necessary here.
				F64 time = message_in.getValueReal( "time" );

				// Convert time to milliseconds for update()
				update( time );
			}
			else
			if ( message_name == "cleanup" )
			{
				// clean up here
			}
			else
			if ( message_name == "shm_added" )
			{
				SharedSegmentInfo info;
				info.mAddress = message_in.getValuePointer( "address" );
				info.mSize = ( size_t )message_in.getValueS32( "size" );
				std::string name = message_in.getValue( "name" );

				mSharedSegments.insert( SharedSegmentMap::value_type( name, info ) );

			}
			else
			if ( message_name == "shm_remove" )
			{
				std::string name = message_in.getValue( "name" );

				SharedSegmentMap::iterator iter = mSharedSegments.find( name );
				if( iter != mSharedSegments.end() )
				{
					if ( mPixels == iter->second.mAddress )
					{
						// This is the currently active pixel buffer.
						// Make sure we stop drawing to it.
						mPixels = NULL;
						mTextureSegmentName.clear();
					};
					mSharedSegments.erase( iter );
				}
				else
				{
					//std::cerr << "MediaPluginExample::receiveMessage: unknown shared memory region!" << std::endl;
				};

				// Send the response so it can be cleaned up.
				LLPluginMessage message( "base", "shm_remove_response" );
				message.setValue( "name", name );
				sendMessage( message );
			}
			else
			{
				//std::cerr << "MediaPluginExample::receiveMessage: unknown base message: " << message_name << std::endl;
			};
		}
		else
		if ( message_class == LLPLUGIN_MESSAGE_CLASS_MEDIA )
		{
			if ( message_name == "size_change" )
			{
				std::string name = message_in.getValue( "name" );
				S32 width = message_in.getValueS32( "width" );
				S32 height = message_in.getValueS32( "height" );
				S32 texture_width = message_in.getValueS32( "texture_width" );
				S32 texture_height = message_in.getValueS32( "texture_height" );

				if ( ! name.empty() )
				{
					// Find the shared memory region with this name
					SharedSegmentMap::iterator iter = mSharedSegments.find( name );
					if ( iter != mSharedSegments.end() )
					{
						mPixels = ( unsigned char* )iter->second.mAddress;
						mWidth = width;
						mHeight = height;

						mTextureWidth = texture_width;
						mTextureHeight = texture_height;

						init();
					};
				};

				LLPluginMessage message( LLPLUGIN_MESSAGE_CLASS_MEDIA, "size_change_response" );
				message.setValue( "name", name );
				message.setValueS32( "width", width );
				message.setValueS32( "height", height );
				message.setValueS32( "texture_width", texture_width );
				message.setValueS32( "texture_height", texture_height );
				sendMessage( message );
			}
			else
			if ( message_name == "load_uri" )
			{
				std::string uri = message_in.getValue( "uri" );
				if ( ! uri.empty() )
				{
				};
			}
			else
			if ( message_name == "mouse_event" )
			{
				std::string event = message_in.getValue( "event" );
				S32 button = message_in.getValueS32( "button" );

				// left mouse button
				if ( button == 0 )
				{
					int mouse_x = message_in.getValueS32( "x" );
					int mouse_y = message_in.getValueS32( "y" );
					std::string modifiers = message_in.getValue( "modifiers" );

					if ( event == "move" )
					{
						if ( mMouseButtonDown )
							write_pixel( mouse_x, mouse_y, rand() % 0x80 + 0x80, rand() % 0x80 + 0x80, rand() % 0x80 + 0x80 );
					}
					else
					if ( event == "down" )
					{
						mMouseButtonDown = true;
					}
					else
					if ( event == "up" )
					{
						mMouseButtonDown = false;
					}
					else
					if ( event == "double_click" )
					{
					};
				};
			}
			else
			if ( message_name == "key_event" )
			{
				std::string event = message_in.getValue( "event" );
				S32 key = message_in.getValueS32( "key" );
				std::string modifiers = message_in.getValue( "modifiers" );

				if ( event == "down" )
				{
					if ( key == ' ')
					{
						mLastUpdateTime = 0;
						update( 0.0f );
					};
				};
			}
			else
			{
				//std::cerr << "MediaPluginExample::receiveMessage: unknown media message: " << message_string << std::endl;
			};
		}
		else
		if ( message_class == LLPLUGIN_MESSAGE_CLASS_MEDIA_BROWSER )
		{
			if ( message_name == "browse_reload" )
			{
				mLastUpdateTime = 0;
				mFirstTime = true;
				mStopAction = false;
				update( 0.0f );
			}
			else
			if ( message_name == "browse_stop" )
			{
				for( int n = 0; n < ENumObjects; ++n )
					mXInc[ n ] = mYInc[ n ] = 0;

				mStopAction = true;
				update( 0.0f );
			}
			else
			{
				//std::cerr << "MediaPluginExample::receiveMessage: unknown media_browser message: " << message_string << std::endl;
			};
		}
		else
		{
			//std::cerr << "MediaPluginExample::receiveMessage: unknown message class: " << message_class << std::endl;
		};
	};
}

////////////////////////////////////////////////////////////////////////////////
//
void MediaPluginExample::write_pixel( int x, int y, unsigned char r, unsigned char g, unsigned char b )
{
	// make sure we don't write outside the buffer
	if ( ( x < 0 ) || ( x >= mWidth ) || ( y < 0 ) || ( y >= mHeight ) )
		return;
		
	if ( mBackgroundPixels != NULL )
	{
		unsigned char *pixel = mBackgroundPixels;
		pixel += y * mWidth * mDepth;
		pixel += ( x * mDepth );
		pixel[ 0 ] = b;
		pixel[ 1 ] = g;
		pixel[ 2 ] = r;

		setDirty( x, y, x + 1, y + 1 );
	};
}

////////////////////////////////////////////////////////////////////////////////
//
void MediaPluginExample::update( F64 milliseconds )
{
	if ( mWidth < 1 || mWidth > 2048 || mHeight < 1 || mHeight > 2048 )
		return;

	if ( mPixels == 0 )
			return;

	if ( mFirstTime )
	{
		for( int n = 0; n < ENumObjects; ++n )
		{
			mXpos[ n ] = ( mWidth / 2 ) + rand() % ( mWidth / 16 ) - ( mWidth / 32 );
			mYpos[ n ] = ( mHeight / 2 ) + rand() % ( mHeight / 16 ) - ( mHeight / 32 );

			mColorR[ n ] = rand() % 0x60 + 0x60;
			mColorG[ n ] = rand() % 0x60 + 0x60;
			mColorB[ n ] = rand() % 0x60 + 0x60;

			mXInc[ n ] = 0;
			while ( mXInc[ n ] == 0 )
				mXInc[ n ] = rand() % 7 - 3;

			mYInc[ n ] = 0;
			while ( mYInc[ n ] == 0 )
				mYInc[ n ] = rand() % 9 - 4;

			mBlockSize[ n ] = rand() % 0x30 + 0x10;
		};

		delete [] mBackgroundPixels;
				
		mBackgroundPixels = new unsigned char[ mWidth * mHeight * mDepth ];

		mFirstTime = false;
	};

	if ( mStopAction )
		return;

	if ( time( NULL ) > mLastUpdateTime + 3 )
	{
		const int num_squares = rand() % 20 + 4;
		int sqr1_r = rand() % 0x80 + 0x20;
		int sqr1_g = rand() % 0x80 + 0x20;
		int sqr1_b = rand() % 0x80 + 0x20;
		int sqr2_r = rand() % 0x80 + 0x20;
		int sqr2_g = rand() % 0x80 + 0x20;
		int sqr2_b = rand() % 0x80 + 0x20;

		for ( int y1 = 0; y1 < num_squares; ++y1 )
		{
			for ( int x1 = 0; x1 < num_squares; ++x1 )
			{
				int px_start = mWidth * x1 / num_squares;
				int px_end = ( mWidth * ( x1 + 1 ) ) / num_squares;
				int py_start = mHeight * y1 / num_squares;
				int py_end = ( mHeight * ( y1 + 1 ) ) / num_squares;

				for( int y2 = py_start; y2 < py_end; ++y2 )
				{
					for( int x2 = px_start; x2 < px_end; ++x2 )
					{
						int rowspan = mWidth * mDepth;

						if ( ( y1 % 2 ) ^ ( x1 % 2 ) )
						{
							mBackgroundPixels[ y2 * rowspan + x2 * mDepth + 0 ] = sqr1_r;
							mBackgroundPixels[ y2 * rowspan + x2 * mDepth + 1 ] = sqr1_g;
							mBackgroundPixels[ y2 * rowspan + x2 * mDepth + 2 ] = sqr1_b;
						}
						else
						{
							mBackgroundPixels[ y2 * rowspan + x2 * mDepth + 0 ] = sqr2_r;
							mBackgroundPixels[ y2 * rowspan + x2 * mDepth + 1 ] = sqr2_g;
							mBackgroundPixels[ y2 * rowspan + x2 * mDepth + 2 ] = sqr2_b;
						};
					};
				};
			};
		};

		time( &mLastUpdateTime );
	};

	memcpy( mPixels, mBackgroundPixels, mWidth * mHeight * mDepth );

	for( int n = 0; n < ENumObjects; ++n )
	{
		if ( rand() % 50 == 0 )
		{
				mXInc[ n ] = 0;
				while ( mXInc[ n ] == 0 )
					mXInc[ n ] = rand() % 7 - 3;

				mYInc[ n ] = 0;
				while ( mYInc[ n ] == 0 )
					mYInc[ n ] = rand() % 9 - 4;
		};

		if ( mXpos[ n ] + mXInc[ n ] < 0 || mXpos[ n ] + mXInc[ n ] >= mWidth - mBlockSize[ n ] )
			mXInc[ n ] =- mXInc[ n ];

		if ( mYpos[ n ] + mYInc[ n ] < 0 || mYpos[ n ] + mYInc[ n ] >= mHeight - mBlockSize[ n ] )
			mYInc[ n ] =- mYInc[ n ];

		mXpos[ n ] += mXInc[ n ];
		mYpos[ n ] += mYInc[ n ];

		for( int y = 0; y < mBlockSize[ n ]; ++y )
		{
			for( int x = 0; x < mBlockSize[ n ]; ++x )
			{
				mPixels[ ( mXpos[ n ] + x ) * mDepth + ( mYpos[ n ] + y ) * mDepth * mWidth + 0 ] = mColorR[ n ];
				mPixels[ ( mXpos[ n ] + x ) * mDepth + ( mYpos[ n ] + y ) * mDepth * mWidth + 1 ] = mColorG[ n ];
				mPixels[ ( mXpos[ n ] + x ) * mDepth + ( mYpos[ n ] + y ) * mDepth * mWidth + 2 ] = mColorB[ n ];
			};
		};
	};

	setDirty( 0, 0, mWidth, mHeight );
};

////////////////////////////////////////////////////////////////////////////////
//
bool MediaPluginExample::init()
{
	LLPluginMessage message( LLPLUGIN_MESSAGE_CLASS_MEDIA, "name_text" );
	message.setValue( "name", "Example Plugin" );
	sendMessage( message );

	return true;
};

////////////////////////////////////////////////////////////////////////////////
//
int init_media_plugin( LLPluginInstance::sendMessageFunction host_send_func,
						void* host_user_data,
						LLPluginInstance::sendMessageFunction *plugin_send_func,
						void **plugin_user_data )
{
	MediaPluginExample* self = new MediaPluginExample( host_send_func, host_user_data );
	*plugin_send_func = MediaPluginExample::staticReceiveMessage;
	*plugin_user_data = ( void* )self;

	return 0;
}