Batching is working! (only in singethreaded mode though)

client/client_recv.js

@@ -364,7 +364,7 @@ function handle_event(state, context, event, options = {}) {
         }
 
         case EVENT.UNDO: {
-            geometry_add_dummy_stroke(context);
+            geometry_add_dummy_stroke(state, context);
             need_draw = undo(state, context, event, options);
             break;
         }
@@ -372,7 +372,7 @@ function handle_event(state, context, event, options = {}) {
         case EVENT.IMAGE: {
             const p = {'x': event.x, 'y': event.y};
 
-            geometry_add_dummy_stroke(context);
+            geometry_add_dummy_stroke(state, context);
             add_image(context, event.image_id, null, p, event.width, event.height);
 
             try {
@@ -401,7 +401,7 @@ function handle_event(state, context, event, options = {}) {
         }
 
         case EVENT.IMAGE_MOVE: {
-            geometry_add_dummy_stroke(context);
+            geometry_add_dummy_stroke(state, context);
             const image_id = event.image_id;
             const image = get_image(context, image_id);
 
@@ -415,7 +415,7 @@ function handle_event(state, context, event, options = {}) {
         }
     
         case EVENT.IMAGE_SCALE: {
-            geometry_add_dummy_stroke(context);
+            geometry_add_dummy_stroke(state, context);
             const image_id = event.image_id;
             const image = get_image(context, image_id);
 
@@ -428,7 +428,7 @@ function handle_event(state, context, event, options = {}) {
         }
 
         case EVENT.ERASER: {
-            geometry_add_dummy_stroke(context);
+            geometry_add_dummy_stroke(state, context);
             need_draw = true;
             const stroke = state.events[event.stroke_id];
             stroke.deleted = true;

client/wasm/lod.c

@@ -323,11 +323,11 @@ do_lod(int *clipped_indices, int clipped_count, float zoom,
 
         // Compute recommended LOD level, add to current batch or start new batch
         float sqrt_width = __builtin_sqrtf(width[stroke_index]); 
-        int lod = __builtin_ceil(sqrt_zoom * sqrt_width * 0.3333f); // TODO: round
+        int lod = __builtin_roundeven(sqrt_zoom * sqrt_width); // NOTE: there is no regular round, but is shouldn't matt:er 
 
         if (lod > 7) lod = 7;
 
-        if (batch_size > 0 && __builtin_abs(lod - last_lod) > 2) {
+        if (batch_size > 0 && lod != last_lod) {
             // Start new batch
             batches[batch_count * 2 + 0] = batch_size;
             batches[batch_count * 2 + 1] = last_lod;

client/webgl_geometry.js

@@ -31,12 +31,15 @@ async function geometry_write_instances(state, context, callback) {
     return segment_count;
 }
 
-function geometry_add_dummy_stroke(context) {
+function geometry_add_dummy_stroke(state, context) {
     context.stroke_data = ser_ensure_by(context.stroke_data, config.bytes_per_stroke);
     ser_u16(context.stroke_data, 0);
     ser_u16(context.stroke_data, 0);
     ser_u16(context.stroke_data, 0);
     ser_u16(context.stroke_data, 0);
+
+    tv_add(state.wasm.buffers['width'].tv, 0);
+    state.wasm.buffers['width'].used += 4;
 }
 
 // Real stroke, add forever