media_plugin_example.cpp
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- /**
- * @file media_plugin_example.cpp
- * @brief Example plugin for LLMedia API plugin system
- *
- * @cond
- * $LicenseInfo:firstyear=2008&license=viewergpl$
- *
- * Copyright (c) 2008-2010, 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://secondlifegrid.net/programs/open_source/licensing/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://secondlifegrid.net/programs/open_source/licensing/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;
- }