From 86d5310736904c9be4696efe4b1f64bf841e1b7b Mon Sep 17 00:00:00 2001
From: Chip Davis <cdavis@codeweavers.com>
Date: Thu, 24 Sep 2020 15:37:05 -0500
Subject: [PATCH] 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.
---
 MoltenVK/MoltenVK/Commands/MVKCommandBuffer.mm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/MoltenVK/MoltenVK/Commands/MVKCommandBuffer.mm b/MoltenVK/MoltenVK/Commands/MVKCommandBuffer.mm
index 08895779..7d619b58 100644
--- a/MoltenVK/MoltenVK/Commands/MVKCommandBuffer.mm
+++ b/MoltenVK/MoltenVK/Commands/MVKCommandBuffer.mm
@@ -338,8 +338,8 @@ void MVKCommandEncoder::beginMetalRenderPass(bool loadOverride) {
     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.