X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Ftexture3d.h;h=1f50e056d8cb286d8e99b4c739f83e5f09c777bd;hp=15d244dec10f116eca42f8c53515e3994720e90a;hb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;hpb=cd446554e998204eaba22504b7b28227feb8edbb

diff --git a/source/texture3d.h b/source/texture3d.h
index 15d244de..1f50e056 100644
--- a/source/texture3d.h
+++ b/source/texture3d.h
@@ -1,43 +1,94 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #ifndef MSP_GL_TEXTURE3D_H_
 #define MSP_GL_TEXTURE3D_H_
 
 #include <string>
-#include "datatype.h"
-#include "pixelformat.h"
 #include "texture.h"
 
 namespace Msp {
 namespace GL {
 
+/**
+Three-dimensional texture.  Consists of an array of texels in the shape of a
+right cuboid.  Texture coordinates have a principal range of [0, 1].
+*/
 class Texture3D: public Texture
 {
+public:
+	class Loader: public Msp::DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>
+	{
+	public:
+		Loader(Texture3D &);
+		Loader(Texture3D &, Collection &);
+	private:
+		void init();
+
+		void raw_data(const std::string &);
+		void storage(PixelFormat, unsigned, unsigned, unsigned);
+		void storage_levels(PixelFormat, unsigned, unsigned, unsigned, unsigned);
+	};
+
 private:
-	PixelFormat ifmt;
 	unsigned width;
 	unsigned height;
 	unsigned depth;
+	unsigned levels;
 	unsigned allocated;
 
+protected:
+	Texture3D(GLenum);
 public:
 	Texture3D();
-	void storage(PixelFormat, unsigned, unsigned, unsigned);
-	void allocate(unsigned);
-	void image(unsigned, PixelFormat, DataType, const void *);
-	void sub_image(unsigned, int, int, int, unsigned, unsigned, unsigned, PixelFormat, DataType, const void *);
-	void load_image(const std::string &fn, int dp = -1);
+
+	/** Defines storage structure for the texture.  If lv is zero, the number
+	of mipmap levels is automatically determined from storage dimensions.
+
+	Must be called before an image can be uploaded.  Once storage is defined,
+	it can't be changed. */
+	void storage(PixelFormat fmt, unsigned wd, unsigned ht, unsigned dp, unsigned lv = 0);
+
+	DEPRECATED void storage(PixelComponents c, unsigned w, unsigned h, unsigned d, unsigned l = 0)
+	{ storage(make_pixelformat(c, UNSIGNED_BYTE), w, h, d, l); }
+
+	/** Allocates storage for the texture.  The contents are initially
+	undefined.  If storage has already been allocated, does nothing. */
+	void allocate(unsigned level);
+
+	/** Updates the contents of the entire texture.  Storage must be defined
+	beforehand.  The image data must have dimensions and format matching the
+	defined storage. */
+	void image(unsigned level, const void *data);
+
+	DEPRECATED void image(unsigned level, PixelComponents comp, DataType type, const void *data);
+
+	/** Updates a cuboid-shaped region of the texture.  Storage must be defined
+	beforehand.  The image data must be in a format mathing the defined storage
+	and the update region must be fully inside the texture. */
+	void sub_image(unsigned level, int x, int y, int z, unsigned wd, unsigned ht, unsigned dp, const void *data);
+
+	DEPRECATED void sub_image(unsigned level,
+		int x, int y, int z, unsigned wd, unsigned ht, unsigned dp,
+		PixelComponents comp, DataType type, const void *data);
+
+	/** Updates the contents of the entire texture from an image.  If storage
+	has not been defined, it will be set to match the image.  In this case the
+	image will be treated as a stack of square layers and its height must be
+	divisible by its width.  Otherwise the image must match the defined
+	storage. */
+	virtual void image(const Graphics::Image &, unsigned = 0);
+
+	using Texture::image;
+
 	unsigned get_width() const { return width; }
 	unsigned get_height() const { return height; }
 	unsigned get_depth() const { return depth; }
-private:
-	void require_storage();
-	void get_level_size(unsigned, unsigned &, unsigned &, unsigned &);
+protected:
+	unsigned get_n_levels() const;
+	void get_level_size(unsigned, unsigned &, unsigned &, unsigned &) const;
+
+public:
+	virtual AsyncLoader *load(IO::Seekable &, const Resources * = 0) { return 0; }
+	virtual UInt64 get_data_size() const;
+	virtual void unload() { }
 };
 
 } // namespace GL