Ensure there is at least one pixel in the render area.
If there are no attachments and `renderTargetWidth` and
`renderTargetHeight` are zero, the Metal validation layer complains. To
prevent this, ensure both are at least 1.
diff --git a/MoltenVK/MoltenVK/Commands/MVKCommandBuffer.mm b/MoltenVK/MoltenVK/Commands/MVKCommandBuffer.mm
index 0889577..7d619b5 100644
--- a/MoltenVK/MoltenVK/Commands/MVKCommandBuffer.mm
+++ b/MoltenVK/MoltenVK/Commands/MVKCommandBuffer.mm
@@ -338,8 +338,8 @@
mtlRPDesc.visibilityResultBuffer = _occlusionQueryState.getVisibilityResultMTLBuffer();
VkExtent2D fbExtent = _framebuffer->getExtent2D();
- mtlRPDesc.renderTargetWidthMVK = min(_renderArea.offset.x + _renderArea.extent.width, fbExtent.width);
- mtlRPDesc.renderTargetHeightMVK = min(_renderArea.offset.y + _renderArea.extent.height, fbExtent.height);
+ mtlRPDesc.renderTargetWidthMVK = max(min(_renderArea.offset.x + _renderArea.extent.width, fbExtent.width), 1u);
+ mtlRPDesc.renderTargetHeightMVK = max(min(_renderArea.offset.y + _renderArea.extent.height, fbExtent.height), 1u);
if (_canUseLayeredRendering) {
if (getSubpass()->isMultiview()) {
// In the case of a multiview pass, the framebuffer layer count will be one.
