Now gpuTime keeps a cumulative count of the rendering time.

Also, previous time is stored in `prevGpuTime`, so that the rendering time of a frame can be computed.
jwittenbach · Jul 6, 2016 · 8e10cbb · 8e10cbb
1 parent ca5fc5e
commit 8e10cbb
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Showing 3 changed files with 7 additions and 3 deletions.
diff --git a/example/stats.js b/example/stats.js
@@ -83,9 +83,11 @@ function createStatsWidget () {
         var drawCall
         var str
         var textCursor = [TEXT_START[0], TEXT_START[1]]
+        var diff
         for (var i = 0; i < drawCalls.length; i++) {
           drawCall = drawCalls[i]
-          str = drawCall[1] + ' : ' + Math.round(100.0 * drawCall[0].stats.gpuTime) / 100.0 + 'ms'
+          diff = drawCall[0].stats.gpuTime - drawCall[0].stats.prevGpuTime
+          str = drawCall[1] + ' : ' + Math.round(100.0 * diff) / 100.0 + 'ms'
 
           context.fillText(str, textCursor[0] * pr, textCursor[1] * pr)
           textCursor[1] += TEXT_SIZE + TEXT_SPACING

diff --git a/lib/core.js b/lib/core.js
@@ -2028,7 +2028,8 @@ module.exports = function reglCore (
       draw(
         env.cond(stats, '.iCollect>=0')
           .then(
-            stats, '.gpuTime=(1.0/(1000.0 * 1000.0) )*',
+            stats, '.prevGpuTime=', stats, '.gpuTime;',
+            stats, '.gpuTime+=(1.0/(1000.0 * 1000.0) )*',
             EXT_DISJOINT_TIMER_QUERY, '.getQueryObjectEXT(',
             stats, '.', '_queries[', stats, '.iCollect', '],', // query
             EXT_DISJOINT_TIMER_QUERY, '.QUERY_RESULT_EXT);'

diff --git a/regl.js b/regl.js
@@ -236,7 +236,8 @@ module.exports = function wrapREGL () {
     var opts = separateDynamic(flattenNestedOptions(options))
 
     var stats = {
-      gpuTime: -1.0
+      gpuTime: 0.0,
+      prevGpuTime: 0.0
     }
     if (extensions.ext_disjoint_timer_query) {
       // FIXME: destroy these two queries somewhere.