X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcore%2Ftexture2d.h;h=b13b8b3ca3bd8c274c04056d00999bbd26707b4e;hb=3efe3bab1c8290bd49a957ebec0ad97e58a35fcf;hp=3a9edae11721c6b626927fed4c5a62e0ab4a72cc;hpb=f73e671dcb36c097647cddbf5b1eaaad2ffc9299;p=libs%2Fgl.git

diff --git a/source/core/texture2d.h b/source/core/texture2d.h
index 3a9edae1..b13b8b3c 100644
--- a/source/core/texture2d.h
+++ b/source/core/texture2d.h
@@ -28,12 +28,47 @@ public:
 		void storage_levels(PixelFormat, unsigned, unsigned, unsigned);
 	};
 
+	/**
+	An RAII handle for asynchronously writing texel data into a texture.
+	*/
+	class AsyncTransfer: public Texture2DBackend::AsyncTransfer
+	{
+		friend Texture2DBackend;
+		friend class Texture2D;
+		friend class Texture2DBackend::AsyncTransfer;
+
+	private:
+		Texture2D *texture = 0;
+		unsigned level = 0;
+		unsigned x = 0;
+		unsigned y = 0;
+		unsigned width = 0;
+		unsigned height = 0;
+		std::size_t data_size = 0;
+		void *dest_addr = 0;
+
+		AsyncTransfer(Texture2D &, unsigned, unsigned, unsigned, unsigned, unsigned);
+	public:
+		AsyncTransfer() = default;
+		AsyncTransfer(AsyncTransfer &&);
+		AsyncTransfer &operator=(AsyncTransfer &&);
+		~AsyncTransfer();
+
+	public:
+		/** Returns an address for writing the texel data.  It should not be used
+		beyond the lifetime of the object. */
+		void *get_address() { return dest_addr; }
+	};
+
 private:
+	class AsyncLoader;
+
 	unsigned width = 0;
 	unsigned height = 0;
-	unsigned levels = 0;
 
 public:
+	Texture2D() = default;
+	Texture2D(Texture2D &&) = default;
 	virtual ~Texture2D();
 
 	/** Sets storage format and dimensions and allocates memory for the texture.
@@ -48,6 +83,8 @@ public:
 	the region must be fully inside the selected mipmap level. */
 	void sub_image(unsigned level, unsigned x, unsigned y, unsigned wd, unsigned ht, const void *);
 
+	AsyncTransfer sub_image_async(unsigned level, unsigned x, unsigned y, unsigned wd, unsigned ht);
+
 	virtual void image(const Graphics::Image &, unsigned = 0);
 
 	unsigned get_width() const { return width; }
@@ -56,6 +93,9 @@ public:
 private:
 	unsigned get_n_levels() const;
 	LinAl::Vector<unsigned, 2> get_level_size(unsigned) const;
+
+public:
+	virtual Resource::AsyncLoader *load(IO::Seekable &, const Resources * = 0);
 };
 
 } // namespace GL