X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcore%2Ftexture2darray.h;h=98cb1bdc13917871abcd21b2742ab0e367e57b46;hb=e1be82a4dfce8d90358c506f65be09da4dc9d5ec;hp=21930f882e813a1240b5fe30eda5deb87b2c30f0;hpb=6065f6622cc275dc0b20baaf7c267e71169d18f3;p=libs%2Fgl.git

diff --git a/source/core/texture2darray.h b/source/core/texture2darray.h
index 21930f88..98cb1bdc 100644
--- a/source/core/texture2darray.h
+++ b/source/core/texture2darray.h
@@ -1,17 +1,18 @@
 #ifndef MSP_GL_TEXTURE2DARRAY_H_
 #define MSP_GL_TEXTURE2DARRAY_H_
 
-#include "texture3d.h"
+#include "texture2darray_backend.h"
 
 namespace Msp {
 namespace GL {
 
 /**
-An array of two-dimensional textures.  It's very much like a 3D texture, with
-two important differences: there's no filtering nor mipmapping along the third
-dimension.
+An array of two-dimensional textures.  It behaves much like a 3D texture, but
+mipmapping and filtering is not applied on the third dimension.  When sampling
+the texture, the third coordinate is not normalized and is rounded to the
+nearest integer to select the layer.
 */
-class Texture2DArray: public Texture3D
+class Texture2DArray: public Texture2DArrayBackend
 {
 public:
 	class Loader: public Msp::DataFile::DerivedObjectLoader<Texture2DArray, Texture3D::Loader>
@@ -25,9 +26,11 @@ public:
 		void external_image(unsigned, const std::string &);
 	};
 
-	Texture2DArray();
-
+	/** Replaces contents of a single layer.  Allocated storage must exist.  The
+	image data is interpreted according to the storage format and must have
+	width and height matching the selected mipmap level. */
 	void layer_image(unsigned, unsigned, const void *);
+
 	void layer_image(unsigned, unsigned, const Graphics::Image &);
 
 	unsigned get_layers() const { return get_depth(); }