Start of UI

ptap/Makefile

@@ -1,8 +1,8 @@
 CFLAGS := -Wall -O3 -g -D_GNU_SOURCE
 LDFLAGS := -lm
 
-CFLAGS += `pkg-config lv2core --cflags`
-LDFLAGS += `pkg-config lv2core --libs`
+CFLAGS += `pkg-config lv2core pugl-0 --cflags`
+LDFLAGS += `pkg-config lv2core pugl-0 --libs`
 
 PTAPSRC := ptap.c
 PTAPSRC += ptapui.c
@@ -18,7 +18,7 @@ depend:
 	makedepend $(PTAPSRC)
 
 $(PTAPO): $(PTAPOBJ)
-	$(CC) -shared -fPIC -Wl,-soname,$(PTAPO) $(PTAPOBJ) -o $@
+	$(CC) $(LDFLAGS) -shared -fPIC -Wl,-soname,$(PTAPO) $(PTAPOBJ) -o $@
 
 .c.o:
 	$(CC) -c -fPIC $(CFLAGS) $< -o $@

ptap/manifest.ttl

@@ -1,7 +1,12 @@
 @prefix lv2:  <http://lv2plug.in/ns/lv2core#> .
 @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
+@prefix ui:   <http://lv2plug.in/ns/extensions/ui#> .
 
 <urn:fuzzle:ptap>
   a lv2:Plugin, lv2:DelayPlugin;
   lv2:binary <ptap.so>;
   rdfs:seeAlso <ptap.ttl>.
+
+<urn:fuzzle:ptap#X11UI>
+  a ui:X11UI;
+  ui:binary <ptap.so>.

ptap/ptap.ttl

@@ -1,6 +1,7 @@
 @prefix lv2: <http://lv2plug.in/ns/lv2core#> .
 @prefix foaf: <http://xmlns.com/foaf/0.1/> .
 @prefix doap: <http://usefulinc.com/ns/doap#> .
+@prefix ui: <http://lv2plug.in/ns/extensions/ui#> .
 
 <urn:fuzzle:ptap>
   a lv2:Plugin;
@@ -12,6 +13,8 @@
   doap:name "PTap";
   doap:license <http://usefulinc.com/doap/licenses/gpl>;
 
+  ui:ui <urn:fuzzle:ptap#X11UI>;
+
   lv2:port [
     a lv2:InputPort, lv2:AudioPort;
     lv2:datatype lv2:float;

ptap/ptapui.c

@@ -1,9 +1,86 @@
+#define _BSD_SOURCE 1
+#include <unistd.h> /* for usleep */
+
+#include <pthread.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <lv2.h>
 #include <lv2/lv2plug.in/ns/extensions/ui/ui.h>
+#include <pugl/pugl.h>
+
+struct ptapui {
+	PuglView *view;
+	pthread_t thread;
+	LV2UI_Write_Function write;
+	LV2UI_Controller controller;
+	int width;
+	int height;
+	bool exit;
+};
+
+static void *ui_thread(void *ptr)
+{
+	struct ptapui *pui = (struct ptapui *)ptr;
+	while (!pui->exit) {
+		usleep(1000000 / 25);
+		puglProcessEvents(pui->view);
+	}
+	return NULL;
+}
+
+static void parameterChanged(struct ptapui *pui, uint32_t index, float value)
+{
+	pui->write(pui->controller, index, sizeof value, 0, &value);
+}
+
+static void onReshape(PuglView *view, int width, int height)
+{
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	glViewport(0, 0, width, height);
+	glOrtho(0, width, height, 0, 0, 1);
+	glMatrixMode(GL_MODELVIEW);
+	glDisable(GL_DEPTH_TEST);
+	glLoadIdentity();
+}
+
+static void onDisplay(PuglView *view)
+{
+	struct ptapui *pui = (struct ptapui *)puglGetHandle(view);
+
+	glClear(GL_COLOR_BUFFER_BIT);
+	glBegin(GL_QUADS);
+
+	GLdouble x2 = 2.0;
+	GLdouble y2 = 2.0;
+	GLdouble x1 = pui->width - 2.0;
+	GLdouble y1 = pui->height - 2.0;
+	glColor3f(1.0f, 0.2f, 0.0f);
+	glVertex2f(x1, y1);
+	glVertex2f(x1, y2);
+	glColor3f(0.0f, 1.0f, 0.0f);
+	glVertex2f(x2, x2);
+	glVertex2f(x2, y1);
+	glEnd();
+}
+
+static void onKeyboard(PuglView *view, bool press, uint32_t key)
+{
+}
+
+static void onMotion(PuglView *view, int x, int y)
+{
+}
+
+static void onMouse(PuglView *view, int button, bool press, int x, int y)
+{
+}
+
+static void onScroll(PuglView *view, float dx, float dy)
+{
+}
 
 static LV2UI_Handle ptapui_instantiate(
 	const LV2UI_Descriptor *descriptor,
@@ -14,11 +91,54 @@ static LV2UI_Handle ptapui_instantiate(
 	LV2UI_Widget *widget,
 	const LV2_Feature *const *host_features)
 {
-	return NULL;
+	PuglNativeWindow parent = 0;
+	LV2UI_Resize *resize = NULL;
+	for (; host_features && *host_features; host_features++) {
+		if (!strcmp((*host_features)->URI, LV2_UI__parent)) {
+			parent = (PuglNativeWindow)(*host_features)->data;
+		} else if (!strcmp((*host_features)->URI, LV2_UI__resize)) {
+			resize = (LV2UI_Resize *)(*host_features)->data;
+		}
+	}
+
+	if (!parent) {
+		fprintf(stderr, "error: ptapui: No parent window provided.\n");
+		return NULL;
+	}
+
+	struct ptapui *pui = malloc(sizeof *pui);
+	pui->write = write_function;
+	pui->controller = controller;
+	pui->width = 320;
+	pui->height = 240;
+	pui->exit = false;
+
+	pui->view = puglCreate(parent, "PTap", pui->width, pui->height, true);
+	puglSetHandle(pui->view, pui);
+	puglSetDisplayFunc(pui->view, onDisplay);
+	puglSetReshapeFunc(pui->view, onReshape);
+	puglSetKeyboardFunc(pui->view, onKeyboard);
+	puglSetMotionFunc(pui->view, onMotion);
+	puglSetMouseFunc(pui->view, onMouse);
+	puglSetScrollFunc(pui->view, onScroll);
+
+	if (resize) {
+		resize->ui_resize(resize->handle, pui->width, pui->height);
+	}
+
+	pthread_create(&pui->thread, NULL, ui_thread, pui);
+
+	*widget = (void*)puglGetNativeWindow(pui->view);
+	return pui;
 }
 
 static void ptapui_cleanup(LV2UI_Handle ui)
 {
+	struct ptapui *pui = (struct ptapui *)ui;
+	pui->exit = true;
+	pthread_join(pui->thread, NULL);
+	puglDestroy(pui->view);
+	free(ui);
 }
 
 static void ptapui_port_event(
@@ -30,13 +150,18 @@ static void ptapui_port_event(
 {
 }
 
+static const void *ptapui_extension_data(const char *uri)
+{
+	return NULL;
+}
+
 static const LV2UI_Descriptor s_lv2uidescriptor =
 {
 	.URI = "urn:fuzzle:ptap#X11UI",
 	.instantiate = &ptapui_instantiate,
 	.cleanup = &ptapui_cleanup,
 	.port_event = &ptapui_port_event,
-	.extension_data = NULL,
+	.extension_data = &ptapui_extension_data,
 };
 
 const LV2UI_Descriptor *lv2ui_descriptor(uint32_t index)