Merge tag '1.11.0-beta2' into jgrpp

# Conflicts:
#	.github/workflows/ci-build.yml
#	.github/workflows/release.yml
#	CMakeLists.txt
#	src/blitter/32bpp_optimized.cpp
#	src/debug.cpp
#	src/gfx.cpp
#	src/gfx_func.h
#	src/lang/czech.txt
#	src/lang/english.txt
#	src/lang/italian.txt
#	src/lang/swedish.txt
#	src/lang/ukrainian.txt
#	src/network/network_server.cpp
#	src/os/windows/crashlog_win.cpp
#	src/os/windows/win32.cpp
#	src/pathfinder/follow_track.hpp
#	src/screenshot.cpp
#	src/settings_type.h
#	src/spritecache.cpp
#	src/vehicle_gui.cpp
#	src/video/sdl2_v.cpp
#	src/video/video_driver.cpp
#	src/video/video_driver.hpp
#	src/video/win32_v.cpp

src/blitter/base.hpp

@@ -43,7 +43,7 @@ DECLARE_ENUM_AS_BIT_SET(BlitterSpriteFlags);
 /**
  * How all blitters should look like. Extend this class to make your own.
  */
-class Blitter {
+class Blitter : public SpriteEncoder {
 public:
 	/** Parameters related to blitting. */
 	struct BlitterParams {
@@ -77,6 +77,11 @@ public:
 	 */
 	virtual uint8 GetScreenDepth() = 0;
 
+	bool Is32BppSupported() override
+	{
+		return this->GetScreenDepth() > 8;
+	}
+
 	/**
 	 * Draw an image to the screen, given an amount of params defined above.
 	 */
@@ -93,11 +98,6 @@ public:
 	 */
 	virtual void DrawColourMappingRect(void *dst, int width, int height, PaletteID pal) = 0;
 
-	/**
-	 * Convert a sprite from the loader to our own format.
-	 */
-	virtual Sprite *Encode(const SpriteLoader::Sprite *sprite, AllocatorProc *allocator) = 0;
-
 	/**
 	 * Move the destination pointer the requested amount x and y, keeping in mind
 	 *  any pitch and bpp of the renderer.
@@ -228,6 +228,14 @@ public:
 	 */
 	virtual Blitter::PaletteAnimation UsePaletteAnimation() = 0;
 
+	/**
+	 * Does this blitter require a separate animation buffer from the video backend?
+	 */
+	virtual bool NeedsAnimationBuffer()
+	{
+		return false;
+	}
+
 	/**
 	 * Get the name of the blitter, the same as the Factory-instance returns.
 	 */