201 lines
7.5 KiB
C++
201 lines
7.5 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 Robert Osfield
|
|
*
|
|
* This library is open source and may be redistributed and/or modified under
|
|
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
|
|
* (at your option) any later version. The full license is in LICENSE file
|
|
* included with this distribution, and on the openscenegraph.org website.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* OpenSceneGraph Public License for more details.
|
|
*/
|
|
|
|
#ifndef OSG_TEXTURECUBEMAP
|
|
#define OSG_TEXTURECUBEMAP 1
|
|
|
|
#include <osg/Texture>
|
|
|
|
#ifndef GL_TEXTURE_CUBE_MAP
|
|
#define GL_TEXTURE_CUBE_MAP 0x8513
|
|
#define GL_TEXTURE_BINDING_CUBE_MAP 0x8514
|
|
#define GL_TEXTURE_CUBE_MAP_POSITIVE_X 0x8515
|
|
#define GL_TEXTURE_CUBE_MAP_NEGATIVE_X 0x8516
|
|
#define GL_TEXTURE_CUBE_MAP_POSITIVE_Y 0x8517
|
|
#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Y 0x8518
|
|
#define GL_TEXTURE_CUBE_MAP_POSITIVE_Z 0x8519
|
|
#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Z 0x851A
|
|
#define GL_PROXY_TEXTURE_CUBE_MAP 0x851B
|
|
#define GL_MAX_CUBE_MAP_TEXTURE_SIZE 0x851C
|
|
#endif
|
|
|
|
namespace osg {
|
|
|
|
/** TextureCubeMap state class which encapsulates OpenGL texture cubemap functionality. */
|
|
class OSG_EXPORT TextureCubeMap : public Texture
|
|
{
|
|
|
|
public :
|
|
|
|
TextureCubeMap();
|
|
|
|
/** Copy constructor using CopyOp to manage deep vs shallow copy. */
|
|
TextureCubeMap(const TextureCubeMap& cm,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
|
|
|
|
META_StateAttribute(osg, TextureCubeMap,TEXTURE);
|
|
|
|
/** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
|
|
virtual int compare(const StateAttribute& rhs) const;
|
|
|
|
virtual GLenum getTextureTarget() const { return GL_TEXTURE_CUBE_MAP; }
|
|
|
|
enum Face {
|
|
POSITIVE_X=0,
|
|
NEGATIVE_X=1,
|
|
POSITIVE_Y=2,
|
|
NEGATIVE_Y=3,
|
|
POSITIVE_Z=4,
|
|
NEGATIVE_Z=5
|
|
};
|
|
|
|
/** Set the texture image for specified face. */
|
|
virtual void setImage(unsigned int face, Image* image);
|
|
|
|
/** Get the texture image for specified face. */
|
|
virtual Image* getImage(unsigned int face);
|
|
|
|
/** Get the const texture image for specified face. */
|
|
virtual const Image* getImage(unsigned int face) const;
|
|
|
|
/** Get the number of images that can be assigned to the Texture. */
|
|
virtual unsigned int getNumImages() const { return 6; }
|
|
|
|
inline unsigned int& getModifiedCount(unsigned int face,unsigned int contextID) const
|
|
{
|
|
// get the modified count for the current contextID.
|
|
return _modifiedCount[face][contextID];
|
|
}
|
|
|
|
/** Set the texture width and height. If width or height are zero then
|
|
* the repsective size value is calculated from the source image sizes.
|
|
*/
|
|
inline void setTextureSize(int width, int height) const
|
|
{
|
|
_textureWidth = width;
|
|
_textureHeight = height;
|
|
}
|
|
|
|
/** Get the texture subload width. */
|
|
inline void getTextureSize(int& width, int& height) const
|
|
{
|
|
width = _textureWidth;
|
|
height = _textureHeight;
|
|
}
|
|
|
|
|
|
class OSG_EXPORT SubloadCallback : public Referenced
|
|
{
|
|
public:
|
|
virtual void load(const TextureCubeMap& texture,State& state) const = 0;
|
|
virtual void subload(const TextureCubeMap& texture,State& state) const = 0;
|
|
};
|
|
|
|
void setSubloadCallback(SubloadCallback* cb) { _subloadCallback = cb;; }
|
|
|
|
SubloadCallback* getSubloadCallback() { return _subloadCallback.get(); }
|
|
|
|
const SubloadCallback* getSubloadCallback() const { return _subloadCallback.get(); }
|
|
|
|
|
|
/** Set the number of mip map levels the the texture has been created with.
|
|
* Should only be called within an osg::Texuture::apply() and custom OpenGL texture load.
|
|
*/
|
|
void setNumMipmapLevels(unsigned int num) const { _numMipmapLevels=num; }
|
|
|
|
/** Get the number of mip map levels the the texture has been created with. */
|
|
unsigned int getNumMipmapLevels() const { return _numMipmapLevels; }
|
|
|
|
/** Copies a two-dimensional texture subimage, as per
|
|
* glCopyTexSubImage2D. Updates a portion of an existing OpenGL
|
|
* texture object from the current OpenGL background framebuffer
|
|
* contents at position \a x, \a y with width \a width and height
|
|
* \a height. Loads framebuffer data into the texture using offsets
|
|
* \a xoffset and \a yoffset. \a width and \a height must be powers
|
|
* of two. */
|
|
void copyTexSubImageCubeMap(State& state, int face, int xoffset, int yoffset, int x, int y, int width, int height );
|
|
|
|
|
|
/** On first apply (unless already compiled), create the mipmapped
|
|
* texture and bind it. Subsequent apply will simple bind to texture.
|
|
*/
|
|
virtual void apply(State& state) const;
|
|
|
|
|
|
/** Extensions class which encapsulates the querying of extensions and
|
|
* associated function pointers, and provides convinience wrappers to
|
|
* check for the extensions or use the associated functions.
|
|
*/
|
|
class OSG_EXPORT Extensions : public osg::Referenced
|
|
{
|
|
public:
|
|
Extensions(unsigned int contextID);
|
|
|
|
Extensions(const Extensions& rhs);
|
|
|
|
void lowestCommonDenominator(const Extensions& rhs);
|
|
|
|
void setupGLExtenions(unsigned int contextID);
|
|
|
|
void setCubeMapSupported(bool flag) { _isCubeMapSupported=flag; }
|
|
bool isCubeMapSupported() const { return _isCubeMapSupported; }
|
|
|
|
protected:
|
|
|
|
~Extensions() {}
|
|
|
|
bool _isCubeMapSupported;
|
|
|
|
};
|
|
|
|
/** Function to call to get the extension of a specified context.
|
|
* If the Exentsion object for that context has not yet been created
|
|
* and the 'createIfNotInitalized' flag been set to false then returns NULL.
|
|
* If 'createIfNotInitalized' is true then the Extensions object is
|
|
* automatically created. However, in this case the extension object will
|
|
* only be created with the graphics context associated with ContextID.
|
|
*/
|
|
static Extensions* getExtensions(unsigned int contextID,bool createIfNotInitalized);
|
|
|
|
/** The setExtensions method allows users to override the extensions across graphics contexts.
|
|
* Typically used when you have different extensions supported across graphics pipes
|
|
* but need to ensure that they all use the same low common denominator extensions.
|
|
*/
|
|
static void setExtensions(unsigned int contextID,Extensions* extensions);
|
|
|
|
|
|
protected :
|
|
|
|
virtual ~TextureCubeMap();
|
|
|
|
bool imagesValid() const;
|
|
|
|
virtual void computeInternalFormat() const;
|
|
|
|
ref_ptr<Image> _images[6];
|
|
|
|
// subloaded images can have different texture and image sizes.
|
|
mutable GLsizei _textureWidth, _textureHeight;
|
|
|
|
// number of mip map levels the the texture has been created with,
|
|
mutable GLsizei _numMipmapLevels;
|
|
|
|
ref_ptr<SubloadCallback> _subloadCallback;
|
|
|
|
typedef buffered_value<unsigned int> ImageModifiedCount;
|
|
mutable ImageModifiedCount _modifiedCount[6];
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|