(svn r14080) -Fix (r14052): assert triggered when drawing chat window with 32bpp-anim blitter (backup buffer was too small)

src/blitter/32bpp_anim.hpp

@@ -34,6 +34,7 @@ public:
 	/* virtual */ Blitter::PaletteAnimation UsePaletteAnimation();
 
 	/* virtual */ const char *GetName() { return "32bpp-anim"; }
+	/* virtual */ int GetBytesPerPixel() { return 5; }
 
 	template <BlitterMode mode> void Draw(const Blitter::BlitterParams *bp, ZoomLevel zoom);
 };

src/blitter/32bpp_base.hpp

@@ -26,6 +26,7 @@ public:
 	/* virtual */ int BufferSize(int width, int height);
 	/* virtual */ void PaletteAnimate(uint start, uint count);
 	/* virtual */ Blitter::PaletteAnimation UsePaletteAnimation();
+	/* virtual */ int GetBytesPerPixel() { return 4; }
 
 	/**
 	 * Compose a colour based on RGB values.

src/blitter/8bpp_base.hpp

@@ -25,6 +25,7 @@ public:
 	/* virtual */ int BufferSize(int width, int height);
 	/* virtual */ void PaletteAnimate(uint start, uint count);
 	/* virtual */ Blitter::PaletteAnimation UsePaletteAnimation();
+	/* virtual */ int GetBytesPerPixel() { return 1; }
 };
 
 #endif /* BLITTER_8BPP_BASE_HPP */

src/blitter/base.hpp

@@ -183,10 +183,15 @@ public:
 	virtual Blitter::PaletteAnimation UsePaletteAnimation() = 0;
 
 	/**
-	 * Get the naem of the blitter, the same as the Factory-instance returns.
+	 * Get the name of the blitter, the same as the Factory-instance returns.
 	 */
 	virtual const char *GetName() = 0;
 
+	/**
+	 * Get how many bytes are needed to store a pixel.
+	 */
+	virtual int GetBytesPerPixel() = 0;
+
 	virtual ~Blitter() { }
 };
 

src/blitter/null.hpp

@@ -28,6 +28,7 @@ public:
 	/* virtual */ Blitter::PaletteAnimation UsePaletteAnimation() { return Blitter::PALETTE_ANIMATION_NONE; };
 
 	/* virtual */ const char *GetName() { return "null"; }
+	/* virtual */ int GetBytesPerPixel() { return 0; }
 };
 
 class FBlitter_Null: public BlitterFactory<FBlitter_Null> {