Use appropriate row/image_height for planar.

vulkan/command_buffer.cpp

@@ -2220,19 +2220,19 @@ void *CommandBuffer::update_image(const Image &image, const VkOffset3D &offset,
 	uint32_t height = image.get_height(subresource.mipLevel);
 	uint32_t depth = image.get_depth(subresource.mipLevel);
 
-	if (!row_length)
-		row_length = width;
-
-	if (!image_height)
-		image_height = height;
-
 	if ((subresource.aspectMask & (VK_IMAGE_ASPECT_PLANE_0_BIT |
 	                               VK_IMAGE_ASPECT_PLANE_1_BIT |
 	                               VK_IMAGE_ASPECT_PLANE_2_BIT)) != 0)
 	{
-		format_ycbcr_downsample_dimensions(create_info.format, subresource.aspectMask, row_length, image_height);
+		format_ycbcr_downsample_dimensions(create_info.format, subresource.aspectMask, width, height);
 	}
 
+	if (!row_length)
+		row_length = width;
+
+	if (!image_height)
+		image_height = height;
+
 	uint32_t blocks_x = row_length;
 	uint32_t blocks_y = image_height;
 	format_num_blocks(create_info.format, blocks_x, blocks_y);