/** * @file media_plugin_example.cpp * @brief Example plugin for LLMedia API plugin system * * @cond * $LicenseInfo:firstyear=2008&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2010, Linden Research, Inc. * * This library 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; * version 2.1 of the License only. * * This library 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 library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ * @endcond */ #include "linden_common.h" #include "llgl.h" #include "llplugininstance.h" #include "llpluginmessage.h" #include "llpluginmessageclasses.h" #include "media_plugin_base.h" #include //////////////////////////////////////////////////////////////////////////////// // 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 ); } 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 == "init" ) { // Plugin gets to decide the texture parameters to use. LLPluginMessage message( 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 == "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; }