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+/**
+ * @file media_plugin_example.cpp
+ * @brief Example plugin for LLMedia API plugin system
+ *
+ * $LicenseInfo:firstyear=2008&license=viewergpl$
+ *
+ * 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.
+ * $/LicenseInfo$
+ */
+
+#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( int 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 );
+ };
+ };
+ }
+ 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 );
+ }
+ else
+ if ( message_name == "browse_stop" )
+ {
+ for( int n = 0; n < ENumObjects; ++n )
+ mXInc[ n ] = mYInc[ n ] = 0;
+
+ mStopAction = true;
+ update( 0 );
+ }
+ 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( int 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;
+}
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