mtl: Report readback buffers to prof

src/rhi/qrhimetal.mm

@@ -1081,6 +1081,10 @@ void QRhiMetal::enqueueResourceUpdates(QRhiCommandBuffer *cb, QRhiResourceUpdate
         textureFormatInfo(aRb.format, aRb.pixelSize, &bpl, &aRb.bufSize);
         aRb.buf = [d->dev newBufferWithLength: aRb.bufSize options: MTLResourceStorageModeShared];
 
+        QRHI_PROF_F(newReadbackBuffer(quint64(quintptr(aRb.buf)),
+                                      texD ? static_cast<QRhiResource *>(texD) : static_cast<QRhiResource *>(swapChainD),
+                                      aRb.bufSize));
+
         ensureBlit();
         [blitEnc copyFromTexture: src
                                   sourceSlice: aRb.desc.layer
@@ -1253,6 +1257,7 @@ void QRhiMetal::executeDeferredReleases(bool forced)
 void QRhiMetal::finishActiveReadbacks(bool forced)
 {
     QVarLengthArray<std::function<void()>, 4> completedCallbacks;
+    QRhiProfilerPrivate *rhiP = profilerPrivateOrNull();
 
     for (int i = d->activeReadbacks.count() - 1; i >= 0; --i) {
         const QRhiMetalData::ActiveReadback &aRb(d->activeReadbacks[i]);
@@ -1264,6 +1269,8 @@ void QRhiMetal::finishActiveReadbacks(bool forced)
             memcpy(aRb.result->data.data(), p, aRb.bufSize);
             [aRb.buf release];
 
+            QRHI_PROF_F(releaseReadbackBuffer(quint64(quintptr(aRb.buf))));
+
             if (aRb.result->completed)
                 completedCallbacks.append(aRb.result->completed);
 

todo.txt

-mtl: report readback temp buf
 multiwindow_threaded should demo pulling out the device and importing to another rhi
 mtl: reduce set*
 advanced blend modes
@@ -17,6 +16,7 @@ anisotropic
 gl: more ubuf types
 more QImage->tex formats
 if tex adjust its size (e.g. npot on gl), should QImage get scaled automatically?
+pool staging/readback buffers?
 d3d, gl, mtl: cache shader sources?
 gl: ubuf structs, arrays
 test cubemap face as target
@@ -47,6 +47,7 @@ dxc for d3d as an alternative to fxc?
 hlsl -> dxc -> spirv -> spirv-cross hmmm...
 
 +++ done
+mtl: report readback temp buf
 vk: support instanceStepRate via VK_EXT_vertex_attribute_divisor
 resize to 0 width or height fails (vk, d3d)
 vk: rendering hangs sometimes when minimize and back on some systems?