From 3b6f0ed7443f58031823df29c1a7bd89d7d63a8d Mon Sep 17 00:00:00 2001
From: Holger Schemel <info@artsoft.org>
Date: Fri, 21 Oct 2016 00:17:03 +0200
Subject: [PATCH] added option for 'masked' element graphics on properties
 buttons

---
 src/editor.c          |  3 +++
 src/libgame/gadgets.c | 17 ++++++++++++++---
 src/libgame/gadgets.h | 34 ++++++++++++++++++----------------
 3 files changed, 35 insertions(+), 19 deletions(-)

diff --git a/src/editor.c b/src/editor.c
index da94af77..c7bf9feb 100644
--- a/src/editor.c
+++ b/src/editor.c
@@ -5451,6 +5451,7 @@ static void CreateControlButtons()
     Bitmap *deco_bitmap = NULL;
     int deco_x = 0, deco_y = 0, deco_xpos = 0, deco_ypos = 0;
     int tile_size = 0, deco_shift = 0;
+    boolean deco_masked = FALSE;
     int gd_x1 = gd->src_x;
     int gd_y1 = gd->src_y;
     int gd_x2 = gd->src_x + gd->pressed_xoffset;
@@ -5515,6 +5516,7 @@ static void CreateControlButtons()
       deco_xpos = (gd->width  - tile_size) / 2;
       deco_ypos = (gd->height - tile_size) / 2;
       deco_shift = 1;
+      deco_masked = gd->draw_masked;
     }
     else
     {
@@ -5541,6 +5543,7 @@ static void CreateControlButtons()
 		      GDI_DECORATION_POSITION, deco_xpos, deco_ypos,
 		      GDI_DECORATION_SIZE, tile_size, tile_size,
 		      GDI_DECORATION_SHIFTING, deco_shift, deco_shift,
+		      GDI_DECORATION_MASKED, deco_masked,
 		      GDI_EVENT_MASK, event_mask,
 		      GDI_CALLBACK_INFO, HandleEditorGadgetInfoText,
 		      GDI_CALLBACK_ACTION, HandleControlButtons,
diff --git a/src/libgame/gadgets.c b/src/libgame/gadgets.c
index b21ecdca..daa045eb 100644
--- a/src/libgame/gadgets.c
+++ b/src/libgame/gadgets.c
@@ -244,9 +244,16 @@ static void DrawGadget(struct GadgetInfo *gi, boolean pressed, boolean direct)
 	int deco_width  = MIN(gi->deco.width,  gi->width  - deco_x);
 	int deco_height = MIN(gi->deco.height, gi->height - deco_y);
 
-	BlitBitmap(gi->deco.design.bitmap, drawto,
-		   gi->deco.design.x, gi->deco.design.y,
-		   deco_width, deco_height, gi->x + deco_x, gi->y + deco_y);
+	if (gi->deco.masked)
+	  BlitBitmapMasked(gi->deco.design.bitmap, drawto,
+			   gi->deco.design.x, gi->deco.design.y,
+			   deco_width, deco_height,
+			   gi->x + deco_x, gi->y + deco_y);
+	else
+	  BlitBitmap(gi->deco.design.bitmap, drawto,
+		     gi->deco.design.x, gi->deco.design.y,
+		     deco_width, deco_height,
+		     gi->x + deco_x, gi->y + deco_y);
       }
 
       break;
@@ -994,6 +1001,10 @@ static void HandleGadgetTags(struct GadgetInfo *gi, int first_tag, va_list ap)
 	gi->deco.yshift = va_arg(ap, int);
 	break;
 
+      case GDI_DECORATION_MASKED:
+	gi->deco.masked = (boolean)va_arg(ap, int);
+	break;
+
       case GDI_EVENT_MASK:
 	gi->event_mask = va_arg(ap, unsigned int);
 	break;
diff --git a/src/libgame/gadgets.h b/src/libgame/gadgets.h
index 5b41ba47..6482e44e 100644
--- a/src/libgame/gadgets.h
+++ b/src/libgame/gadgets.h
@@ -93,22 +93,23 @@
 #define GDI_DECORATION_POSITION		30
 #define GDI_DECORATION_SIZE		31
 #define GDI_DECORATION_SHIFTING		32
-#define GDI_EVENT_MASK			33
-#define GDI_EVENT			34
-#define GDI_CALLBACK_INFO		35
-#define GDI_CALLBACK_ACTION		36
-#define GDI_AREA_SIZE			37
-#define GDI_ITEM_SIZE			38
-#define GDI_SCROLLBAR_ITEMS_MAX		39
-#define GDI_SCROLLBAR_ITEMS_VISIBLE	40
-#define GDI_SCROLLBAR_ITEM_POSITION	41
-#define GDI_WHEEL_AREA_X		42
-#define GDI_WHEEL_AREA_Y		43
-#define GDI_WHEEL_AREA_WIDTH		44
-#define GDI_WHEEL_AREA_HEIGHT		45
-#define GDI_INFO_TEXT			46
-#define GDI_ACTIVE			47
-#define GDI_DIRECT_DRAW			48
+#define GDI_DECORATION_MASKED		33
+#define GDI_EVENT_MASK			34
+#define GDI_EVENT			35
+#define GDI_CALLBACK_INFO		36
+#define GDI_CALLBACK_ACTION		37
+#define GDI_AREA_SIZE			38
+#define GDI_ITEM_SIZE			39
+#define GDI_SCROLLBAR_ITEMS_MAX		40
+#define GDI_SCROLLBAR_ITEMS_VISIBLE	41
+#define GDI_SCROLLBAR_ITEM_POSITION	42
+#define GDI_WHEEL_AREA_X		43
+#define GDI_WHEEL_AREA_Y		44
+#define GDI_WHEEL_AREA_WIDTH		45
+#define GDI_WHEEL_AREA_HEIGHT		46
+#define GDI_INFO_TEXT			47
+#define GDI_ACTIVE			48
+#define GDI_DIRECT_DRAW			49
 
 /* gadget deactivation hack */
 #define GDI_ACTIVE_POS(a)		((a) < 0 ? POS_OFFSCREEN : (a))
@@ -135,6 +136,7 @@ struct GadgetDecoration
   int x, y;				/* position of deco on the gadget */
   int width, height;			/* width and height of decoration */
   int xshift, yshift;			/* deco shifting when gadget pressed */
+  boolean masked;			/* draw decoration masked over button */
 };
 
 struct GadgetEvent
-- 
2.34.1