GUI: initial wave synth UI

src/engine/waveSynth.cpp

@@ -1,5 +1,52 @@
 #include "waveSynth.h"
+#include "engine.h"
 
 bool DivWaveSynth::tick() {
-  return false;
+  bool updated=first;
+  first=false;
+
+  
+  return updated;
+}
+
+void DivWaveSynth::setEngine(DivEngine* engine) {
+  e=engine;
+}
+
+void DivWaveSynth::init(DivInstrument* which, int w, int h, bool insChanged) {
+  if (e==NULL) return;
+  if (which==NULL) {
+    state=DivInstrumentWaveSynth();
+  }
+  state=which->ws;
+  width=w;
+  height=h;
+  pos=0;
+  stage=0;
+  divCounter=0;
+  first=true;
+
+  DivWavetable* w1=e->getWave(state.wave1);
+  DivWavetable* w2=e->getWave(state.wave2);
+  for (int i=0; i<width; i++) {
+    if (w1->max<1 || w1->len<1) {
+      wave1[i]=0;
+    } else {
+      int data=w1->data[i*w1->len/width]*height/w1->max;
+      if (data<0) data=0;
+      if (data>31) data=31;
+      wave1[i]=data;
+    }
+  }
+
+  for (int i=0; i<width; i++) {
+    if (w2->max<1 || w2->len<1) {
+      wave2[i]=0;
+    } else {
+      int data=w2->data[i*w2->len/width]*height/w2->max;
+      if (data<0) data=0;
+      if (data>31) data=31;
+      wave2[i]=data;
+    }
+  }
 }