From f889ed089a7f09aac9140e9c101c114255f2d317 Mon Sep 17 00:00:00 2001
From: pelya <x.pelya.x@gmail.com>
Date: Sun, 12 Apr 2015 22:31:20 +0300
Subject: [PATCH] New GFX functions to draw cenetered sprites

---
 src/gfx.cpp    | 44 ++++++++++++++++++++++++++++++++++++++++++++
 src/gfx_func.h |  3 +++
 2 files changed, 47 insertions(+)

diff --git a/src/gfx.cpp b/src/gfx.cpp
index ec45926a71..66fc835399 100644
--- a/src/gfx.cpp
+++ b/src/gfx.cpp
@@ -856,6 +856,50 @@ void DrawSprite(SpriteID img, PaletteID pal, int x, int y, const SubSprite *sub,
 	}
 }
 
+/**
+ * Draw a sprite, centered at x:y, not in a viewport
+ * @param img  Image number to draw
+ * @param pal  Palette to use.
+ * @param x    Left coordinate of image in pixels
+ * @param y    Top coordinate of image in pixels
+ * @param sub  If available, draw only specified part of the sprite
+ * @param zoom Zoom level of sprite
+ */
+void DrawSpriteCentered(SpriteID img, PaletteID pal, int x, int y, const SubSprite *sub, ZoomLevel zoom)
+{
+	Dimension size = GetSpriteSize(img, NULL, zoom);
+	DrawSprite(img, pal, x - size.width / 2, y - size.height / 2, sub, zoom);
+}
+
+/**
+ * Draw a sprite, centered in rect, not in a viewport
+ * @param img    Image number to draw
+ * @param pal    Palette to use.
+ * @param left   Left coordinate of image bounding box in pixels
+ * @param top    Top coordinate of image bounding box in pixels
+ * @param right  Right coordinate of image bounding box in pixels
+ * @param bottom Bottom coordinate of image bounding box in pixels
+ * @param sub    If available, draw only specified part of the sprite
+ * @param zoom   Zoom level of sprite
+ */
+void DrawSpriteCenteredInRect(SpriteID img, PaletteID pal, int left, int top, int right, int bottom, const SubSprite *sub, ZoomLevel zoom)
+{
+	DrawSpriteCentered(img, pal, (left + right) / 2, (top + bottom) / 2, sub, zoom);
+}
+
+/**
+ * Draw a sprite, centered in rect, not in a viewport
+ * @param img    Image number to draw
+ * @param pal    Palette to use.
+ * @param rect   Image bounding box in pixels
+ * @param sub    If available, draw only specified part of the sprite
+ * @param zoom   Zoom level of sprite
+ */
+void DrawSpriteCenteredInRect(SpriteID img, PaletteID pal, const Rect &rect, const SubSprite *sub, ZoomLevel zoom)
+{
+	DrawSpriteCenteredInRect(img, pal, rect.left, rect.top, rect.right, rect.bottom, sub, zoom);
+}
+
 /**
  * The code for setting up the blitter mode and sprite information before finally drawing the sprite.
  * @param sprite The sprite to draw.
diff --git a/src/gfx_func.h b/src/gfx_func.h
index f48e3610b3..91b764ad81 100644
--- a/src/gfx_func.h
+++ b/src/gfx_func.h
@@ -96,6 +96,9 @@ void GfxScroll(int left, int top, int width, int height, int xo, int yo);
 Dimension GetSpriteSize(SpriteID sprid, Point *offset = NULL, ZoomLevel zoom = ZOOM_LVL_GUI);
 void DrawSpriteViewport(SpriteID img, PaletteID pal, int x, int y, const SubSprite *sub = NULL);
 void DrawSprite(SpriteID img, PaletteID pal, int x, int y, const SubSprite *sub = NULL, ZoomLevel zoom = ZOOM_LVL_GUI);
+void DrawSpriteCentered(SpriteID img, PaletteID pal, int x, int y, const SubSprite *sub = NULL, ZoomLevel zoom = ZOOM_LVL_GUI);
+void DrawSpriteCenteredInRect(SpriteID img, PaletteID pal, int left, int top, int right, int bottom, const SubSprite *sub = NULL, ZoomLevel zoom = ZOOM_LVL_GUI);
+void DrawSpriteCenteredInRect(SpriteID img, PaletteID pal, const Rect &r, const SubSprite *sub = NULL, ZoomLevel zoom = ZOOM_LVL_GUI);
 
 /** How to align the to-be drawn text. */
 enum StringAlignment {