(svn r18709) -Fix (r10227,FS#3464): Animation buffer for 32bpp-anim blitter was only validated during sprite blitting, other drawing operations didn't check it. Initial startup and window resize could therefore lead to crash.

src/blitter/32bpp_anim.cpp

@@ -202,14 +202,6 @@ void Blitter_32bppAnim::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomL
 		return;
 	}
 
-	if (_screen.width != this->anim_buf_width || _screen.height != this->anim_buf_height) {
-		/* The size of the screen changed; we can assume we can wipe all data from our buffer */
-		free(this->anim_buf);
-		this->anim_buf = CallocT<uint8>(_screen.width * _screen.height);
-		this->anim_buf_width = _screen.width;
-		this->anim_buf_height = _screen.height;
-	}
-
 	switch (mode) {
 		default: NOT_REACHED();
 		case BM_NORMAL:       Draw<BM_NORMAL>      (bp, zoom); return;
@@ -448,3 +440,14 @@ Blitter::PaletteAnimation Blitter_32bppAnim::UsePaletteAnimation()
 {
 	return Blitter::PALETTE_ANIMATION_BLITTER;
 }
+
+void Blitter_32bppAnim::PostResize()
+{
+	if (_screen.width != this->anim_buf_width || _screen.height != this->anim_buf_height) {
+		/* The size of the screen changed; we can assume we can wipe all data from our buffer */
+		free(this->anim_buf);
+		this->anim_buf = CallocT<uint8>(_screen.width * _screen.height);
+		this->anim_buf_width = _screen.width;
+		this->anim_buf_height = _screen.height;
+	}
+}

src/blitter/32bpp_anim.hpp

@@ -42,6 +42,7 @@ public:
 
 	/* virtual */ const char *GetName() { return "32bpp-anim"; }
 	/* virtual */ int GetBytesPerPixel() { return 5; }
+	/* virtual */ void PostResize();
 
 	template <BlitterMode mode> void Draw(const Blitter::BlitterParams *bp, ZoomLevel zoom);
 };

src/blitter/base.hpp

@@ -200,6 +200,11 @@ public:
 	 */
 	virtual int GetBytesPerPixel() = 0;
 
+	/**
+	 * Post resize event
+	 */
+	virtual void PostResize() { };
+
 	virtual ~Blitter() { }
 };