initial commit.

10 files changed, 841 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..78f666d
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,59 @@
+cmake_minimum_required(VERSION 2.8)
+
+project(canvas.lv2)
+
+include_directories(${PROJECT_SOURCE_DIR})
+include_directories(${PROJECT_SOURCE_DIR}/pugl)
+
+set(CMAKE_C_FLAGS "-std=gnu11 -Wextra -Wno-unused-parameter -ffast-math -fvisibility=hidden ${CMAKE_C_FLAGS}")
+set(CMAKE_C_FLAGS "-Wshadow -Wimplicit-function-declaration -Wmissing-prototypes -Wstrict-prototypes ${CMAKE_C_FLAGS}")
+set(CMAKE_MODULE_LINKER_FLAGS "-Wl,-z,nodelete ${CMAKE_MODULE_LINKER_FLAGS}")
+set(CMAKE_MODULE_LINKER_FLAGS "-Wl,-z,defs ${CMAKE_MODULE_LINKER_FLAGS}")
+add_definitions("-D_GNU_SOURCE=1") # asprintf
+
+file(STRINGS "VERSION" CANVAS_VERSION)
+string(REPLACE "." ";" VERSION_LIST ${CANVAS_VERSION})
+list(GET VERSION_LIST 0 CANVAS_MAJOR_VERSION)
+list(GET VERSION_LIST 1 CANVAS_MINOR_VERSION)
+list(GET VERSION_LIST 2 CANVAS_MICRO_VERSION)
+add_definitions("-DCANVAS_VERSION=\"${CANVAS_VERSION}\"")
+
+set(DEST lib/lv2/canvas.lv2)
+
+find_package(PkgConfig) # ${PKG_CONFIG_FOUND}
+
+pkg_search_module(LV2 REQUIRED lv2>=1.10)
+include_directories(${LV2_INCLUDE_DIRS})
+
+pkg_search_module(CAIRO REQUIRED cairo>=1.14)
+include_directories(${CAIRO_INCLUDE_DIRS})
+add_definitions("-DPUGL_HAVE_CAIRO")
+
+pkg_search_module(X11 REQUIRED x11>=1.6)
+include_directories(${X11_INCLUDE_DIRS})
+
+pkg_search_module(GL REQUIRED gl>=12.0)
+include_directories(${GL_INCLUDE_DIRS})
+add_definitions("-DPUGL_HAVE_GL")
+
+add_library(canvas MODULE
+	canvas.c)
+target_link_libraries(canvas
+	${CAIRO_LDFLAGS})
+set_target_properties(canvas PROPERTIES PREFIX "")
+install(TARGETS canvas DESTINATION ${DEST})
+
+add_library(canvas_ui MODULE
+	canvas_ui.c
+	pugl/pugl/pugl_x11.c)
+target_link_libraries(canvas_ui
+	${CAIRO_LDFLAGS}
+	${X11_LDFLAGS}
+	${GL_LDFLAGS})
+set_target_properties(canvas_ui PROPERTIES PREFIX "")
+install(TARGETS canvas_ui DESTINATION ${DEST})
+
+configure_file(${PROJECT_SOURCE_DIR}/manifest.ttl.in ${PROJECT_BINARY_DIR}/manifest.ttl)
+install(FILES ${PROJECT_BINARY_DIR}/manifest.ttl DESTINATION ${DEST})
+install(FILES ${PROJECT_SOURCE_DIR}/canvas.ttl DESTINATION ${DEST})
+install(FILES ${PROJECT_SOURCE_DIR}/canvas_ui.ttl DESTINATION ${DEST})
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..ddb9a46
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,201 @@
+		       The Artistic License 2.0
+
+	    Copyright (c) 2000-2006, The Perl Foundation.
+
+     Everyone is permitted to copy and distribute verbatim copies
+      of this license document, but changing it is not allowed.
+
+Preamble
+
+This license establishes the terms under which a given free software
+Package may be copied, modified, distributed, and/or redistributed.
+The intent is that the Copyright Holder maintains some artistic
+control over the development of that Package while still keeping the
+Package available as open source and free software.
+
+You are always permitted to make arrangements wholly outside of this
+license directly with the Copyright Holder of a given Package.  If the
+terms of this license do not permit the full use that you propose to
+make of the Package, you should contact the Copyright Holder and seek
+a different licensing arrangement. 
+
+Definitions
+
+    "Copyright Holder" means the individual(s) or organization(s)
+    named in the copyright notice for the entire Package.
+
+    "Contributor" means any party that has contributed code or other
+    material to the Package, in accordance with the Copyright Holder's
+    procedures.
+
+    "You" and "your" means any person who would like to copy,
+    distribute, or modify the Package.
+
+    "Package" means the collection of files distributed by the
+    Copyright Holder, and derivatives of that collection and/or of
+    those files. A given Package may consist of either the Standard
+    Version, or a Modified Version.
+
+    "Distribute" means providing a copy of the Package or making it
+    accessible to anyone else, or in the case of a company or
+    organization, to others outside of your company or organization.
+
+    "Distributor Fee" means any fee that you charge for Distributing
+    this Package or providing support for this Package to another
+    party.  It does not mean licensing fees.
+
+    "Standard Version" refers to the Package if it has not been
+    modified, or has been modified only in ways explicitly requested
+    by the Copyright Holder.
+
+    "Modified Version" means the Package, if it has been changed, and
+    such changes were not explicitly requested by the Copyright
+    Holder. 
+
+    "Original License" means this Artistic License as Distributed with
+    the Standard Version of the Package, in its current version or as
+    it may be modified by The Perl Foundation in the future.
+
+    "Source" form means the source code, documentation source, and
+    configuration files for the Package.
+
+    "Compiled" form means the compiled bytecode, object code, binary,
+    or any other form resulting from mechanical transformation or
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+
+
+Permission for Use and Modification Without Distribution
+
+(1)  You are permitted to use the Standard Version and create and use
+Modified Versions for any purpose without restriction, provided that
+you do not Distribute the Modified Version.
+
+
+Permissions for Redistribution of the Standard Version
+
+(2)  You may Distribute verbatim copies of the Source form of the
+Standard Version of this Package in any medium without restriction,
+either gratis or for a Distributor Fee, provided that you duplicate
+all of the original copyright notices and associated disclaimers.  At
+your discretion, such verbatim copies may or may not include a
+Compiled form of the Package.
+
+(3)  You may apply any bug fixes, portability changes, and other
+modifications made available from the Copyright Holder.  The resulting
+Package will still be considered the Standard Version, and as such
+will be subject to the Original License.
+
+
+Distribution of Modified Versions of the Package as Source 
+
+(4)  You may Distribute your Modified Version as Source (either gratis
+or for a Distributor Fee, and with or without a Compiled form of the
+Modified Version) provided that you clearly document how it differs
+from the Standard Version, including, but not limited to, documenting
+any non-standard features, executables, or modules, and provided that
+you do at least ONE of the following:
+
+    (a)  make the Modified Version available to the Copyright Holder
+    of the Standard Version, under the Original License, so that the
+    Copyright Holder may include your modifications in the Standard
+    Version.
+
+    (b)  ensure that installation of your Modified Version does not
+    prevent the user installing or running the Standard Version. In
+    addition, the Modified Version must bear a name that is different
+    from the name of the Standard Version.
+
+    (c)  allow anyone who receives a copy of the Modified Version to
+    make the Source form of the Modified Version available to others
+    under
+		
+	(i)  the Original License or
+
+	(ii)  a license that permits the licensee to freely copy,
+	modify and redistribute the Modified Version using the same
+	licensing terms that apply to the copy that the licensee
+	received, and requires that the Source form of the Modified
+	Version, and of any works derived from it, be made freely
+	available in that license fees are prohibited but Distributor
+	Fees are allowed.
+
+
+Distribution of Compiled Forms of the Standard Version 
+or Modified Versions without the Source
+
+(5)  You may Distribute Compiled forms of the Standard Version without
+the Source, provided that you include complete instructions on how to
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+time while you are carrying out such distribution, become invalid, you
+must provide new instructions on demand or cease further distribution.
+If you provide valid instructions or cease distribution within thirty
+days after you become aware that the instructions are invalid, then
+you do not forfeit any of your rights under this license.
+
+(6)  You may Distribute a Modified Version in Compiled form without
+the Source, provided that you comply with Section 4 with respect to
+the Source of the Modified Version.
+
+
+Aggregating or Linking the Package 
+
+(7)  You may aggregate the Package (either the Standard Version or
+Modified Version) with other packages and Distribute the resulting
+aggregation provided that you do not charge a licensing fee for the
+Package.  Distributor Fees are permitted, and licensing fees for other
+components in the aggregation are permitted. The terms of this license
+apply to the use and Distribution of the Standard or Modified Versions
+as included in the aggregation.
+
+(8) You are permitted to link Modified and Standard Versions with
+other works, to embed the Package in a larger work of your own, or to
+build stand-alone binary or bytecode versions of applications that
+include the Package, and Distribute the result without restriction,
+provided the result does not expose a direct interface to the Package.
+
+
+Items That are Not Considered Part of a Modified Version 
+
+(9) Works (including, but not limited to, modules and scripts) that
+merely extend or make use of the Package, do not, by themselves, cause
+the Package to be a Modified Version.  In addition, such works are not
+considered parts of the Package itself, and are not subject to the
+terms of this license.
+
+
+General Provisions
+
+(10)  Any use, modification, and distribution of the Standard or
+Modified Versions is governed by this Artistic License. By using,
+modifying or distributing the Package, you accept this license. Do not
+use, modify, or distribute the Package, if you do not accept this
+license.
+
+(11)  If your Modified Version has been derived from a Modified
+Version made by someone other than you, you are nevertheless required
+to ensure that your Modified Version complies with the requirements of
+this license.
+
+(12)  This license does not grant you the right to use any trademark,
+service mark, tradename, or logo of the Copyright Holder.
+
+(13)  This license includes the non-exclusive, worldwide,
+free-of-charge patent license to make, have made, use, offer to sell,
+sell, import and otherwise transfer the Package with respect to any
+patent claims licensable by the Copyright Holder that are necessarily
+infringed by the Package. If you institute patent litigation
+(including a cross-claim or counterclaim) against any party alleging
+that the Package constitutes direct or contributory patent
+infringement, then this Artistic License to you shall terminate on the
+date that such litigation is filed.
+
+(14)  Disclaimer of Warranty:
+THE PACKAGE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS
+IS' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES. THE IMPLIED
+WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
+NON-INFRINGEMENT ARE DISCLAIMED TO THE EXTENT PERMITTED BY YOUR LOCAL
+LAW. UNLESS REQUIRED BY LAW, NO COPYRIGHT HOLDER OR CONTRIBUTOR WILL
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THE PACKAGE, EVEN IF
+ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..2a575d3
--- /dev/null
+++ b/README.md
@@ -0,0 +1,44 @@
+# Canvas
+
+## Canvas LV2 plugin bundle
+
+### Webpage 
+
+Get more information at: [http://open-music-kontrollers.ch/lv2/canvas](http://open-music-kontrollers.ch/lv2/canvas)
+
+### Build status
+
+[![Build Status](https://travis-ci.org/OpenMusicKontrollers/canvas.lv2.svg)](https://travis-ci.org/OpenMusicKontrollers/canvas.lv2)
+
+### Dependencies
+
+* [LV2](http://lv2plug.in) (LV2 Plugin Standard)
+* [pugl](http://drobilla.net/software/pugl) (Portable API for OpenGL GUIs)
+* [cairo](http://cairographics.org) (Cairo Vector Graphics Library)
+
+### Build / install
+
+	git clone https://github.com/OpenMusicKontrollers/canvas.lv2.git
+	cd canvas.lv2
+	mkdir build
+	cd build
+	cmake  ..
+	make
+	sudo make install
+
+### License
+
+Copyright (c) 2016 Hanspeter Portner (dev@open-music-kontrollers.ch)
+
+This is free software: you can redistribute it and/or modify
+it under the terms of the Artistic License 2.0 as published by
+The Perl Foundation.
+
+This source 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
+Artistic License 2.0 for more details.
+
+You should have received a copy of the Artistic License 2.0
+along the source as a COPYING file. If not, obtain it from
+<http://www.perlfoundation.org/artistic_license_2_0>.
diff --git a/VERSION b/VERSION
new file mode 100644
index 0000000..17e51c3
--- /dev/null
+++ b/VERSION
@@ -0,0 +1 @@
+0.1.1
diff --git a/canvas.c b/canvas.c
new file mode 100644
index 0000000..5091e60
--- /dev/null
+++ b/canvas.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2016 Hanspeter Portner (dev@open-music-kontrollers.ch)
+ *
+ * This is free software: you can redistribute it and/or modify
+ * it under the terms of the Artistic License 2.0 as published by
+ * The Perl Foundation.
+ *
+ * This source 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
+ * Artistic License 2.0 for more details.
+ *
+ * You should have received a copy of the Artistic License 2.0
+ * along the source as a COPYING file. If not, obtain it from
+ * http://www.perlfoundation.org/artistic_license_2_0.
+ */
+
+#include <stdlib.h>
+
+#include <canvas.h>
+
+typedef struct _plughandle_t plughandle_t;
+
+struct _plughandle_t {
+	const LV2_Atom_Sequence *control;
+	LV2_Atom_Sequence *notify;
+};
+
+static LV2_Handle
+instantiate(const LV2_Descriptor* descriptor, double rate,
+	const char *bundle_path, const LV2_Feature *const *features)
+{
+	plughandle_t *handle = calloc(1, sizeof(plughandle_t));
+	if(!handle)
+		return NULL;
+
+	return handle;
+}
+
+static void
+connect_port(LV2_Handle instance, uint32_t port, void *data)
+{
+	plughandle_t *handle = instance;
+
+	switch(port)
+	{
+		case 0:
+			handle->control = data;
+			break;
+		case 1:
+			handle->notify = data;
+			break;
+		default:
+			break;
+	}
+}
+
+static void
+run(LV2_Handle instance, uint32_t nsamples)
+{
+	plughandle_t *handle = instance;
+
+	const uint32_t sz = lv2_atom_total_size(&handle->control->atom);
+	memcpy(handle->notify, handle->control, sz);
+}
+
+static void
+cleanup(LV2_Handle instance)
+{
+	plughandle_t *handle = instance;
+
+	free(handle);
+}
+
+const LV2_Descriptor canvas_canvas = {
+	.URI						= CANVAS_CANVAS_URI,
+	.instantiate		= instantiate,
+	.connect_port		= connect_port,
+	.activate				= NULL,
+	.run						= run,
+	.deactivate			= NULL,
+	.cleanup				= cleanup,
+	.extension_data	= NULL
+};
+
+LV2_SYMBOL_EXPORT const LV2_Descriptor*
+lv2_descriptor(uint32_t index)
+{
+	switch(index)
+	{
+		case 0:
+			return &canvas_canvas;
+		default:
+			return NULL;
+	}
+}
diff --git a/canvas.h b/canvas.h
new file mode 100644
index 0000000..4a66bb1
--- /dev/null
+++ b/canvas.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2016 Hanspeter Portner (dev@open-music-kontrollers.ch)
+ *
+ * This is free software: you can redistribute it and/or modify
+ * it under the terms of the Artistic License 2.0 as published by
+ * The Perl Foundation.
+ *
+ * This source 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
+ * Artistic License 2.0 for more details.
+ *
+ * You should have received a copy of the Artistic License 2.0
+ * along the source as a COPYING file. If not, obtain it from
+ * http://www.perlfoundation.org/artistic_license_2_0.
+ */
+
+#ifndef _CANVAS_LV2_H
+#define _CANVAS_LV2_H
+
+#include "lv2/lv2plug.in/ns/ext/atom/atom.h"
+#include "lv2/lv2plug.in/ns/ext/atom/forge.h"
+#include "lv2/lv2plug.in/ns/extensions/ui/ui.h"
+#include "lv2/lv2plug.in/ns/lv2core/lv2.h"
+	
+#define CANVAS_URI               "http://open-music-kontrollers.ch/lv2/canvas"
+
+#define CANVAS_CANVAS_URI        CANVAS_URI"#canvas"
+#define CANVAS_CANVAS_UI_URI     CANVAS_URI"#canvas_ui"
+
+extern const LV2_Descriptor canvas_canvas;
+extern const LV2UI_Descriptor canvas_canvas_ui;
+
+#endif // _CANVAS_LV2_H
diff --git a/canvas.ttl b/canvas.ttl
new file mode 100644
index 0000000..0d70d02
--- /dev/null
+++ b/canvas.ttl
@@ -0,0 +1,68 @@
+# Copyright (c) 2016 Hanspeter Portner (dev@open-music-kontrollers.ch)
+#
+# This is free software: you can redistribute it and/or modify
+# it under the terms of the Artistic License 2.0 as published by
+# The Perl Foundation.
+#
+# This source 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
+# Artistic License 2.0 for more details.
+#
+# You should have received a copy of the Artistic License 2.0
+# along the source as a COPYING file. If not, obtain it from
+# http://www.perlfoundation.org/artistic_license_2_0.
+
+@prefix foaf:	<http://xmlns.com/foaf/0.1/> .
+@prefix doap:	<http://usefulinc.com/ns/doap#> .
+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
+@prefix rdf: <http://www.w3.org/2000/01/rdf-schema#> .
+@prefix lv2: <http://lv2plug.in/ns/lv2core#> .
+@prefix atom:	<http://lv2plug.in/ns/ext/atom#> .
+
+@prefix lic: <http://opensource.org/licenses/> .
+@prefix omk: <http://open-music-kontrollers.ch/ventosus#> .
+@prefix proj:	<http://open-music-kontrollers.ch/lv2/> .
+@prefix canvas: <http://open-music-kontrollers.ch/lv2/canvas#> .
+
+# Maintainer
+omk:me
+	a foaf:Person ;
+	foaf:name "Hanspeter Portner" ;
+	foaf:mbox <mailto:dev@open-music-kontrollers.ch> ;
+	foaf:homepage <http://open-music-kontrollers.ch> .
+
+# Project
+proj:canvas
+	a doap:Project ;
+	doap:maintainer omk:me ;
+	doap:name "Canvas Bundle" .
+
+# Canvas Plugin
+canvas:canvas
+	a lv2:Plugin,
+		lv2:AnalyserPlugin ;
+	doap:name "Canvas" ;
+	doap:license lic:Artistic-2.0 ;
+	lv2:project proj:canvas ;
+	lv2:optionalFeature lv2:isLive, lv2:hardRTCapable ;
+
+	lv2:port [
+	  a lv2:InputPort ,
+			atom:AtomPort ;
+		atom:bufferType atom:Sequence ;
+		#atom:supports midi:MidiEvent ;
+		lv2:index 0 ;
+		lv2:symbol "control" ;
+		lv2:name "Control" ;
+		lv2:designation lv2:control ;
+	] , [
+	  a lv2:OutputPort ,
+			atom:AtomPort ;
+		atom:bufferType atom:Sequence ;
+		#atom:supports midi:MidiEvent ;
+		lv2:index 1 ;
+		lv2:symbol "notify" ;
+		lv2:name "Notify" ;
+		lv2:designation lv2:control ;
+	] .
diff --git a/canvas_ui.c b/canvas_ui.c
new file mode 100644
index 0000000..b15372a
--- /dev/null
+++ b/canvas_ui.c
@@ -0,0 +1,274 @@
+/*
+ * Copyright (c) 2016 Hanspeter Portner (dev@open-music-kontrollers.ch)
+ *
+ * This is free software: you can redistribute it and/or modify
+ * it under the terms of the Artistic License 2.0 as published by
+ * The Perl Foundation.
+ *
+ * This source 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
+ * Artistic License 2.0 for more details.
+ *
+ * You should have received a copy of the Artistic License 2.0
+ * along the source as a COPYING file. If not, obtain it from
+ * http://www.perlfoundation.org/artistic_license_2_0.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+
+#include <canvas.h>
+
+#include <pugl/pugl.h>
+
+#include <cairo/cairo.h>
+
+typedef struct _plughandle_t plughandle_t;
+
+struct _plughandle_t {
+	PuglView *view;
+	double val;
+	int done;
+};
+
+static inline void
+_expose(plughandle_t *handle)
+{
+	cairo_t *ctx = puglGetContext(handle->view);
+	cairo_surface_t *surf = cairo_get_target(ctx);
+
+	// Draw background
+	int w, h;
+	puglGetSize(handle->view, &w, &h);
+
+	cairo_surface_set_device_scale(surf, w, h);
+
+	cairo_set_source_rgba(ctx, 0.0, 0.0, 0.0, 1.0);
+	cairo_rectangle(ctx, 0.0, 0.0, 1.0, 1.0);
+	cairo_fill(ctx);
+
+	cairo_set_source_rgba(ctx, handle->val, handle->val, 0.0, 1.0);
+	cairo_arc(ctx, 0.5, 0.5, 0.4, 0.0, 2*M_PI);
+	cairo_fill(ctx);
+}
+
+static inline void
+_close(plughandle_t *handle)
+{
+	handle->done = 1;
+}
+
+static inline void
+_enter(plughandle_t *handle)
+{
+	puglPostRedisplay(handle->view);
+}
+
+static inline void
+_leave(plughandle_t *handle)
+{
+	puglPostRedisplay(handle->view);
+}
+
+static void
+_event_func(PuglView *view, const PuglEvent *ev)
+{
+	plughandle_t *handle = puglGetHandle(view);
+
+	switch(ev->type)
+	{
+		case PUGL_NOTHING:
+			break;
+		case PUGL_BUTTON_PRESS:
+			break;
+		case PUGL_BUTTON_RELEASE:
+			break;
+		case PUGL_CONFIGURE:
+			break;
+		case PUGL_EXPOSE:
+			_expose(handle);
+			break;
+		case PUGL_CLOSE:
+			_close(handle);
+			break;
+		case PUGL_KEY_PRESS:
+			break;
+		case PUGL_KEY_RELEASE:
+			break;
+		case PUGL_ENTER_NOTIFY:
+			_enter(handle);
+			break;
+		case PUGL_LEAVE_NOTIFY:
+			_leave(handle);
+			break;
+		case PUGL_MOTION_NOTIFY:
+			break;
+		case PUGL_SCROLL:
+			break;
+		case PUGL_FOCUS_IN:
+			break;
+		case PUGL_FOCUS_OUT:
+			break;
+	}
+}
+
+static LV2UI_Handle
+instantiate(const LV2UI_Descriptor *descriptor, const char *plugin_uri,
+	const char *bundle_path, LV2UI_Write_Function write_function,
+	LV2UI_Controller controller, LV2UI_Widget *widget,
+	const LV2_Feature *const *features)
+{
+	plughandle_t *handle= calloc(1, sizeof(plughandle_t));
+	if(!handle)
+		return NULL;
+
+	void *parent = NULL;
+	LV2UI_Resize *host_resize = NULL;
+	for(int i=0; features[i]; i++)
+	{
+		if(!strcmp(features[i]->URI, LV2_UI__parent))
+			parent = features[i]->data;
+		else if(!strcmp(features[i]->URI, LV2_UI__resize))
+			host_resize = features[i]->data;
+	}
+
+	if(!parent)
+	{
+		free(handle);
+		return NULL;
+	}
+
+	handle->view = puglInit(NULL, NULL);
+	if(!handle->view)
+	{
+		free(handle);
+		return NULL;
+	}
+
+	const int w = 400;
+	const int h = 400;;
+	puglInitWindowClass(handle->view, "canvas");
+	puglInitWindowParent(handle->view, (intptr_t)parent);
+	puglInitWindowSize(handle->view, w, h);
+	puglInitWindowMinSize(handle->view, w, h);
+	puglInitWindowAspectRatio(handle->view, 1, 1, 1, 1);
+	puglInitResizable(handle->view, true);
+	puglInitTransientFor(handle->view, (intptr_t)parent);
+#ifdef PUGL_HAVE_GL
+	puglInitContextType(handle->view, PUGL_CAIRO_GL);
+#else
+	puglInitContextType(handle->view, PUGL_CAIRO);
+#endif
+	puglSetHandle(handle->view, handle);
+	puglSetEventFunc(handle->view, _event_func);
+
+	int stat = puglCreateWindow(handle->view, "Canvas");
+	if(stat)
+	{
+		free(handle);
+		return NULL;
+	}
+	puglShowWindow(handle->view);
+
+	const intptr_t child = puglGetNativeWindow(handle->view);
+	*(intptr_t *)widget = child;
+
+	if(host_resize)
+		host_resize->ui_resize(host_resize->handle, w, h);
+
+	return handle;
+}
+
+static void
+cleanup(LV2UI_Handle instance)
+{
+	plughandle_t *handle = instance;
+
+	if(handle->view)
+	{
+		if(puglGetVisible(handle->view))
+			puglHideWindow(handle->view);
+		puglDestroy(handle->view);
+	}
+
+	free(handle);
+}
+
+static void
+port_event(LV2UI_Handle instance, uint32_t index, uint32_t size,
+	uint32_t protocol, const void *buf)
+{
+	//FIXME
+}
+
+static int 
+_resize(LV2UI_Handle instance, int w, int h)
+{
+	plughandle_t *handle = instance;
+
+	//FIXME
+	//puglInitWindowSize(handle->view, w, h);
+	//puglInitWindowMinSize(handle->view, w, h);
+
+	return 0;
+}
+
+static const LV2UI_Resize resize_ext = {
+	.ui_resize= _resize
+};
+
+static int
+_idle(LV2UI_Handle instance)
+{
+	plughandle_t *handle = instance;
+
+	handle->val += 0.01;
+	if(handle->val >= 1.0)
+		handle->val = 0.0;
+
+	puglPostRedisplay(handle->view);
+
+	if(puglProcessEvents(handle->view) != PUGL_SUCCESS)
+	{
+		//TODO
+	}
+
+	return handle->done;
+}
+
+static const LV2UI_Idle_Interface idle_ext = {
+	.idle = _idle
+};
+
+static const void *
+extension_data(const char *uri)
+{
+	if(!strcmp(uri, LV2_UI__idleInterface))
+		return &idle_ext;
+	else if(!strcmp(uri, LV2_UI__resize))
+		return &resize_ext;
+		
+	return NULL;
+}
+
+const LV2UI_Descriptor canvas_canvas_ui = {
+	.URI						= CANVAS_CANVAS_UI_URI,
+	.instantiate		= instantiate,
+	.cleanup				= cleanup,
+	.port_event			= port_event,
+	.extension_data	= extension_data
+};
+
+LV2_SYMBOL_EXPORT const LV2UI_Descriptor*
+lv2ui_descriptor(uint32_t index)
+{
+	switch(index)
+	{
+		case 0:
+			return &canvas_canvas_ui;
+		default:
+			return NULL;
+	}
+}
diff --git a/canvas_ui.ttl b/canvas_ui.ttl
new file mode 100644
index 0000000..7072870
--- /dev/null
+++ b/canvas_ui.ttl
@@ -0,0 +1,30 @@
+# Copyright (c) 2016 Hanspeter Portner (dev@open-music-kontrollers.ch)
+#
+# This is free software: you can redistribute it and/or modify
+# it under the terms of the Artistic License 2.0 as published by
+# The Perl Foundation.
+#
+# This source 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
+# Artistic License 2.0 for more details.
+#
+# You should have received a copy of the Artistic License 2.0
+# along the source as a COPYING file. If not, obtain it from
+# http://www.perlfoundation.org/artistic_license_2_0.
+
+@prefix lv2:  <http://lv2plug.in/ns/lv2core#> .
+@prefix ui:   <http://lv2plug.in/ns/extensions/ui#> .
+@prefix atom: <http://lv2plug.in/ns/ext/atom#> .
+
+@prefix canvas:	<http://open-music-kontrollers.ch/lv2/canvas#> .
+
+canvas:canvas_ui
+	a ui:X11UI ;
+	ui:portNotification [
+		ui:plugin canvas:canvas ;
+		lv2:symbol "notify" ;
+		ui:protocol atom:eventTransfer
+	] ;
+	lv2:requiredFeature ui:idleInterface ;
+  lv2:extensionData ui:idleInterface, ui:showInterface .
diff --git a/manifest.ttl.in b/manifest.ttl.in
new file mode 100644
index 0000000..4bcd3ef
--- /dev/null
+++ b/manifest.ttl.in
@@ -0,0 +1,34 @@
+# Copyright (c) 2016 Hanspeter Portner (dev@open-music-kontrollers.ch)
+#
+# This is free software: you can redistribute it and/or modify
+# it under the terms of the Artistic License 2.0 as published by
+# The Perl Foundation.
+#
+# This source 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
+# Artistic License 2.0 for more details.
+#
+# You should have received a copy of the Artistic License 2.0
+# along the source as a COPYING file. If not, obtain it from
+# http://www.perlfoundation.org/artistic_license_2_0.
+
+@prefix lv2:  <http://lv2plug.in/ns/lv2core#> .
+@prefix owl:  <http://www.w3.org/2002/07/owl#> .
+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
+@prefix ui:   <http://lv2plug.in/ns/extensions/ui#> .
+
+@prefix canvas:	<http://open-music-kontrollers.ch/lv2/canvas#> .
+
+canvas:canvas
+	a lv2:Plugin ;
+	lv2:minorVersion @CANVAS_MINOR_VERSION@ ;
+	lv2:microVersion @CANVAS_MICRO_VERSION@ ;
+	lv2:binary <canvas@CMAKE_SHARED_MODULE_SUFFIX@> ;
+	ui:ui canvas:canvas_ui ;
+	rdfs:seeAlso <canvas.ttl> .
+
+canvas:canvas_ui
+	a ui:X11UI ;
+	ui:binary <canvas_ui@CMAKE_SHARED_MODULE_SUFFIX@> ;
+	rdfs:seeAlso <canvas_ui.ttl> .