void USlateBrushThumbnailRenderer::Draw(UObject* Object, int32 X, int32 Y, uint32 Width, uint32 Height, FRenderTarget* RenderTarget, FCanvas* Canvas) { USlateBrushAsset* SlateBrushAsset = Cast<USlateBrushAsset>(Object); if (SlateBrushAsset) { FSlateBrush Brush = SlateBrushAsset->Brush; UTexture2D* Texture = Cast<UTexture2D>( Brush.GetResourceObject() ); // Draw the background checkboard pattern const int32 CheckerDensity = 8; auto* Checker = UThumbnailManager::Get().CheckerboardTexture; Canvas->DrawTile( 0.0f, 0.0f, Width, Height, // Dimensions 0.0f, 0.0f, CheckerDensity, CheckerDensity, // UVs FLinearColor::White, Checker->Resource); // Tint & Texture if (Texture) { switch(Brush.DrawAs) { case ESlateBrushDrawType::Image: { FCanvasTileItem CanvasTile( FVector2D( X, Y ), Texture->Resource, FVector2D( Width,Height ), Brush.TintColor.GetSpecifiedColor() ); CanvasTile.BlendMode = SE_BLEND_Translucent; CanvasTile.Draw( Canvas ); } break; case ESlateBrushDrawType::Border: { FCanvasTileItem CanvasTile( FVector2D( X, Y ), Texture->Resource, FVector2D( Width,Height ), Brush.TintColor.GetSpecifiedColor() ); CanvasTile.BlendMode = SE_BLEND_Translucent; CanvasTile.Draw( Canvas ); } break; case ESlateBrushDrawType::Box: { float NaturalWidth = Texture->GetSurfaceWidth(); float NaturalHeight = Texture->GetSurfaceHeight(); float TopPx = FMath::Clamp<float>(NaturalHeight * Brush.Margin.Top, 0, Height); float BottomPx = FMath::Clamp<float>(NaturalHeight * Brush.Margin.Bottom, 0, Height); float VerticalCenterPx = FMath::Clamp<float>(Height - TopPx - BottomPx, 0, Height); float LeftPx = FMath::Clamp<float>(NaturalWidth * Brush.Margin.Left, 0, Width); float RightPx = FMath::Clamp<float>(NaturalWidth * Brush.Margin.Right, 0, Width); float HorizontalCenterPx = FMath::Clamp<float>(Width - LeftPx - RightPx, 0, Width); // Top-Left FVector2D TopLeftSize( LeftPx, TopPx ); { FVector2D UV0( 0, 0 ); FVector2D UV1( Brush.Margin.Left, Brush.Margin.Top ); FCanvasTileItem CanvasTile( FVector2D( X, Y ), Texture->Resource, TopLeftSize, UV0, UV1, Brush.TintColor.GetSpecifiedColor() ); CanvasTile.BlendMode = SE_BLEND_Translucent; CanvasTile.Draw( Canvas ); } // Bottom-Left FVector2D BottomLeftSize( LeftPx, BottomPx ); { FVector2D UV0( 0, 1 - Brush.Margin.Bottom ); FVector2D UV1( Brush.Margin.Left, 1 ); FCanvasTileItem CanvasTile( FVector2D( X, Y + Height - BottomPx ), Texture->Resource, BottomLeftSize, UV0, UV1, Brush.TintColor.GetSpecifiedColor() ); CanvasTile.BlendMode = SE_BLEND_Translucent; CanvasTile.Draw( Canvas ); } // Top-Right FVector2D TopRightSize( RightPx, TopPx ); { FVector2D UV0( 1 - Brush.Margin.Right, 0 ); FVector2D UV1( 1, Brush.Margin.Top ); FCanvasTileItem CanvasTile( FVector2D( X + Width - RightPx, Y ), Texture->Resource, TopRightSize, UV0, UV1, Brush.TintColor.GetSpecifiedColor() ); CanvasTile.BlendMode = SE_BLEND_Translucent; CanvasTile.Draw( Canvas ); } // Bottom-Right FVector2D BottomRightSize( RightPx, BottomPx ); { FVector2D UV0( 1 - Brush.Margin.Right, 1 - Brush.Margin.Bottom ); FVector2D UV1( 1, 1 ); FCanvasTileItem CanvasTile( FVector2D( X + Width - RightPx, Y + Height - BottomPx ), Texture->Resource, BottomRightSize, UV0, UV1, Brush.TintColor.GetSpecifiedColor() ); CanvasTile.BlendMode = SE_BLEND_Translucent; CanvasTile.Draw( Canvas ); } //----------------------------------------------------------------------- // Center-Vertical-Left FVector2D CenterVerticalLeftSize( LeftPx, VerticalCenterPx ); { FVector2D UV0( 0, Brush.Margin.Top ); FVector2D UV1( Brush.Margin.Left, 1 - Brush.Margin.Bottom ); FCanvasTileItem CanvasTile( FVector2D( X, Y + TopPx), Texture->Resource, CenterVerticalLeftSize, UV0, UV1, Brush.TintColor.GetSpecifiedColor() ); CanvasTile.BlendMode = SE_BLEND_Translucent; CanvasTile.Draw( Canvas ); } // Center-Vertical-Right FVector2D CenterVerticalRightSize( RightPx, VerticalCenterPx ); { FVector2D UV0( 1 - Brush.Margin.Right, Brush.Margin.Top ); FVector2D UV1( 1, 1 - Brush.Margin.Bottom ); FCanvasTileItem CanvasTile( FVector2D( X + Width - RightPx, Y + TopPx), Texture->Resource, CenterVerticalRightSize, UV0, UV1, Brush.TintColor.GetSpecifiedColor() ); CanvasTile.BlendMode = SE_BLEND_Translucent; CanvasTile.Draw( Canvas ); } //----------------------------------------------------------------------- // Center-Horizontal-Top FVector2D CenterHorizontalTopSize( HorizontalCenterPx, TopPx ); { FVector2D UV0( Brush.Margin.Left, 0 ); FVector2D UV1( 1 - Brush.Margin.Right, Brush.Margin.Top ); FCanvasTileItem CanvasTile( FVector2D( X + LeftPx, Y), Texture->Resource, CenterHorizontalTopSize, UV0, UV1, Brush.TintColor.GetSpecifiedColor() ); CanvasTile.BlendMode = SE_BLEND_Translucent; CanvasTile.Draw( Canvas ); } // Center-Horizontal-Bottom FVector2D CenterHorizontalBottomSize( HorizontalCenterPx, BottomPx ); { FVector2D UV0( Brush.Margin.Left, 1 - Brush.Margin.Bottom ); FVector2D UV1( 1 - Brush.Margin.Right, 1 ); FCanvasTileItem CanvasTile( FVector2D( X + LeftPx, Y + Height - BottomPx ), Texture->Resource, CenterHorizontalBottomSize, UV0, UV1, Brush.TintColor.GetSpecifiedColor() ); CanvasTile.BlendMode = SE_BLEND_Translucent; CanvasTile.Draw( Canvas ); } //----------------------------------------------------------------------- // Center FVector2D CenterSize( HorizontalCenterPx, VerticalCenterPx ); { FVector2D UV0( Brush.Margin.Left, Brush.Margin.Top ); FVector2D UV1( 1 - Brush.Margin.Right, 1 - Brush.Margin.Bottom ); FCanvasTileItem CanvasTile( FVector2D( X + LeftPx, Y + TopPx), Texture->Resource, CenterSize, UV0, UV1, Brush.TintColor.GetSpecifiedColor() ); CanvasTile.BlendMode = SE_BLEND_Translucent; CanvasTile.Draw( Canvas ); } } break; case ESlateBrushDrawType::NoDrawType: { FCanvasTileItem CanvasTile( FVector2D( X, Y ), Texture->Resource, FVector2D( Width,Height ), Brush.TintColor.GetSpecifiedColor() ); CanvasTile.BlendMode = SE_BLEND_Translucent; CanvasTile.Draw( Canvas ); } break; default: check(false); } } } }
static UMaterialInterface* GetMaterial(void* Data) { FSlateBrush* Brush = (FSlateBrush*)Data; return Cast<UMaterialInterface>(Brush->GetResourceObject()); }