X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftexture2d.h;h=994c4efd7224c43605ec0f6097483124e809db35;hb=afd625b06702e7a25e0730601f03955832b64e65;hp=e06ea920a1aff896f7c1c50ed1f87fac75e7b007;hpb=f098a871fc6dc7b61a5aca5581fa327e4124c036;p=libs%2Fgl.git

diff --git a/source/texture2d.h b/source/texture2d.h
index e06ea920..994c4efd 100644
--- a/source/texture2d.h
+++ b/source/texture2d.h
@@ -1,31 +1,76 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #ifndef MSP_GL_TEXTURE2D_H_
 #define MSP_GL_TEXTURE2D_H_
 
 #include <string>
+#include <msp/graphics/image.h>
+#include "datatype.h"
+#include "pixelformat.h"
 #include "texture.h"
 
 namespace Msp {
 namespace GL {
 
+/**
+Two-dimensional texture.  Consists of an array of texels in the shape of a
+rectangle.  Texture coordinate have a principal range of [0, 1].  This is the
+most common type of texture.
+*/
 class Texture2D: public Texture
 {
+public:
+	class Loader: public Msp::DataFile::DerivedObjectLoader<Texture2D, Texture::Loader>
+	{
+	public:
+		Loader(Texture2D &);
+	private:
+		void image_data(const std::string &);
+		void raw_data(const std::string &);
+		void storage(PixelFormat, unsigned, unsigned);
+		void storage_b(PixelFormat, unsigned, unsigned, unsigned);
+	};
+
+private:
+	PixelFormat ifmt;
+	unsigned width;
+	unsigned height;
+	unsigned allocated;
+
 public:
 	Texture2D();
-	void image(int, int, sizei, sizei, int, GLenum, GLenum, void *);
-	void image(int, sizei, sizei, TextureFormat, void *);
-	void image(const std::string &);
-	sizei get_width() const  { return width_; }
-	sizei get_height() const { return height_; }
+
+	/** Defines storage structure for the texture.  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);
+
+	/** Allocates storage for the texture.  The contents are initially
+	undefined.  If storage has already been allocated, does nothing. */
+	void allocate(unsigned level);
+	
+	/** Uploads an image to the texture.  Storage must be defined beforehand.
+	The image data must have dimensions and format compatible with the defined
+	storage. */
+	void image(unsigned level, PixelFormat fmt, DataType type, const void *data);
+
+	/** Updates a rectangular region of the texture.  Storage must be defined
+	and allocated beforehand.  The update region must be fully inside the
+	texture. */
+	void sub_image(unsigned level, int x, int y, unsigned wd, unsigned ht,
+		PixelFormat fmt, DataType type, const void *data);
+
+	/** Loads an image from a file and uploads it to the texture.  If storage
+	has not been defined, it will be set to match the loaded image.  Otherwise
+	the image must be compatible with the defined storage. */
+	void load_image(const std::string &fn);
+
+private:
+	void image(const Graphics::Image &);
+
+public:
+	unsigned get_width() const { return width; }
+	unsigned get_height() const { return height; }
+
 private:
-	sizei width_;
-	sizei height_;
+	void get_level_size(unsigned, unsigned &, unsigned &);
 };
 
 } // namespace GL