vulkan: ignore paint region if framebuffer is undefined

src/gfx_api.rs

@@ -283,6 +283,11 @@ pub trait GfxFramebuffer: Debug {
     ) -> Result<Option<SyncFile>, GfxError>;
 
     fn format(&self) -> &'static Format;
+
+    fn full_region(&self) -> Region {
+        let (width, height) = self.physical_size();
+        Region::new2(Rect::new_sized_unchecked(0, 0, width, height))
+    }
 }
 
 pub trait GfxInternalFramebuffer: GfxFramebuffer {
@@ -319,11 +324,6 @@ impl dyn GfxFramebuffer {
         )
     }
 
-    fn full_region(&self) -> Region {
-        let (width, height) = self.physical_size();
-        Region::new2(Rect::new_sized_unchecked(0, 0, width, height))
-    }
-
     pub fn clear(
         self: &Rc<Self>,
         acquire_sync: AcquireSync,

src/gfx_apis/vulkan/renderer.rs

@@ -4,8 +4,8 @@ use {
         cpu_worker::PendingJob,
         format::XRGB8888,
         gfx_api::{
-            AcquireSync, BufferResv, BufferResvUser, GfxApiOpt, GfxFormat, GfxTexture,
+            AcquireSync, BufferResv, BufferResvUser, GfxApiOpt, GfxFormat, GfxFramebuffer,
-            GfxWriteModifier, ReleaseSync, SyncFile,
+            GfxTexture, GfxWriteModifier, ReleaseSync, SyncFile,
         },
         gfx_apis::vulkan::{
             VulkanError,
@@ -1075,6 +1075,12 @@ impl VulkanRenderer {
     }
 
     fn create_paint_regions(&self, fb: &VulkanImage, region: &Region) {
+        let mut region = region;
+        let region_owned;
+        if fb.contents_are_undefined.get() {
+            region_owned = fb.full_region();
+            region = &region_owned;
+        }
         let memory = &mut *self.memory.borrow_mut();
         memory.paint_regions.clear();
         for rect in region.rects() {