elements/resources: unload Async resources after use

Author: vaxerski

src/element/image/Image.cpp

@@ -104,6 +104,9 @@ void CImageElement::renderTex() {
 }
 
 void SImageImpl::postImageLoad() {
+    if (!resource)
+        return;
+
     if (resource->m_asset.cairoSurface) {
         ASP<IAsyncResource> resourceGeneric(resource);
         size = resource->m_asset.pixelSize;
@@ -114,6 +117,7 @@ void SImageImpl::postImageLoad() {
     }
 
     oldTex.reset();
+    resource.reset();
 
     waitingForTex = false;
     if (!failed) {

src/element/text/Text.cpp

@@ -343,6 +343,9 @@ void STextImpl::renderTex() {
 }
 
 void STextImpl::postTexLoad() {
+    if (!resource)
+        return;
+
     ASP<IAsyncResource> resourceGeneric(resource);
     size = resource->m_asset.pixelSize;
     tex  = g_renderer->uploadTexture({.resource = resourceGeneric});
@@ -352,6 +355,7 @@ void STextImpl::postTexLoad() {
 
     waitingForTex = false;
     newTex        = true;
+    resource.reset();
 
     if (data.callback)
         data.callback();