Make sure bitmap fallback is only used for non-cached text.

Also fixes backwards vertical justification for bitmap text.

Fixes https://gitlab.com/kicad/code/kicad/issues/10956

common/gal/opengl/opengl_gal.cpp

@@ -1340,8 +1340,6 @@ void OPENGL_GAL::BitmapText( const wxString& aText, const VECTOR2I& aPosition,
     switch( GetVerticalJustify() )
     {
     case GR_TEXT_V_ALIGN_TOP:
-        Translate( VECTOR2D( 0, -textSize.y ) );
-        overbarHeight = -textSize.y / 2.0;
         break;
 
     case GR_TEXT_V_ALIGN_CENTER:
@@ -1350,6 +1348,8 @@ void OPENGL_GAL::BitmapText( const wxString& aText, const VECTOR2I& aPosition,
         break;
 
     case GR_TEXT_V_ALIGN_BOTTOM:
+        Translate( VECTOR2D( 0, -textSize.y ) );
+        overbarHeight = -textSize.y / 2.0;
         break;
     }
 

eeschema/sch_painter.cpp

@@ -255,6 +255,14 @@ bool SCH_PAINTER::Draw( const VIEW_ITEM *aItem, int aLayer )
 #define BITMAP_FONT_LOD_THRESHOLD 3.5
 
 
+bool SCH_PAINTER::nonCached( const EDA_ITEM* aItem )
+{
+    // TODO: it would be nice to have a more definitive test for this, but we've currently got
+    // no access to the VIEW_GROUP to see if it's cached or not.
+    return aItem->IsSelected();
+}
+
+
 bool SCH_PAINTER::underLODThreshold( int aFontSize )
 {
     return aFontSize * m_gal->GetWorldScale() < BITMAP_FONT_LOD_THRESHOLD;
@@ -875,7 +883,7 @@ void SCH_PAINTER::draw( const LIB_FIELD *aField, int aLayer )
         attrs.m_Valign = GR_TEXT_V_ALIGN_CENTER;
         attrs.m_StrokeWidth = getTextThickness( aField, drawingShadows );
 
-        if( underLODThreshold( aField->GetTextHeight() ) )
+        if( nonCached( aField ) && underLODThreshold( aField->GetTextHeight() ) )
             bitmapText( UnescapeString( aField->GetText() ), textpos, attrs );
         else
             strokeText( UnescapeString( aField->GetText() ), textpos, attrs );
@@ -943,7 +951,7 @@ void SCH_PAINTER::draw( const LIB_TEXT* aText, int aLayer )
         attrs.m_Halign = GR_TEXT_H_ALIGN_CENTER;
         attrs.m_Valign = GR_TEXT_V_ALIGN_CENTER;
 
-        if( underLODThreshold( aText->GetTextHeight() ) )
+        if( nonCached( aText ) && underLODThreshold( aText->GetTextHeight() ) )
             bitmapText( aText->GetText(), pos, attrs );
         else
             strokeText( aText->GetText(), pos, attrs );
@@ -1405,7 +1413,7 @@ void SCH_PAINTER::draw( LIB_PIN *aPin, int aLayer )
                 {
                     boxText( text[i], aPos, attrs );
                 }
-                else if( underLODThreshold( size[i] ) )
+                else if( nonCached( aPin ) && underLODThreshold( size[i] ) )
                 {
                     bitmapText( text[i], aPos, attrs );
                 }
@@ -1830,7 +1838,7 @@ void SCH_PAINTER::draw( const SCH_TEXT *aText, int aLayer )
         attrs.m_Angle = aText->GetDrawRotation();
         attrs.m_StrokeWidth = getTextThickness( aText, drawingShadows );
 
-        if( underLODThreshold( aText->GetTextHeight() ) )
+        if( nonCached( aText ) && underLODThreshold( aText->GetTextHeight() ) )
         {
             bitmapText( shownText, aText->GetDrawPos() + text_offset, attrs );
         }
@@ -2179,7 +2187,7 @@ void SCH_PAINTER::draw( const SCH_FIELD *aField, int aLayer )
         attributes.m_StrokeWidth = getTextThickness( aField, drawingShadows );
         attributes.m_Angle = orient;
 
-        if( underLODThreshold( aField->GetTextHeight() ) )
+        if( nonCached( aField ) && underLODThreshold( aField->GetTextHeight() ) )
         {
             bitmapText( shownText, textpos, attributes );
         }

eeschema/sch_painter.h

@@ -183,6 +183,9 @@ private:
     int internalPinDecoSize( const LIB_PIN &aPin );
     int externalPinDecoSize( const LIB_PIN &aPin );
 
+    // Indicates the item is drawn on a non-cached layer in OpenGL
+    bool nonCached( const EDA_ITEM* aItem );
+
     bool underLODThreshold( int aFontSize );
 
     bool isUnitAndConversionShown( const LIB_ITEM* aItem ) const;