FGFS-4.1/OpenSceneGraph
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Updates the osg::Texture3D::Extensions interface to support the standardisation

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of extensions supported across multiple graphics contexts.
This commit is contained in:
Robert Osfield
2002-09-14 10:38:28 +00:00
parent 6d21fbd6cf
commit ce36cda0cc
2 changed files with 49 additions and 9 deletions
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16
include/osg/Texture3D
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@@ -100,6 +100,12 @@ class SG_EXPORT Texture3D : public Texture
public:
Extensions();
Extensions(const Extensions& rhs);
void lowestCommonDenominator(const Extensions& rhs);
void setupGLExtenions();
bool isTexture3DSupported() const { return _isTexture3DSupported; }
bool isTexture3DFast() const { return _isTexture3DFast; }
GLint maxTexture3DSize() const { return _maxTexture3DSize; }
@@ -113,11 +119,6 @@ class SG_EXPORT Texture3D : public Texture
~Extensions() {}
typedef void (APIENTRY * GLTexImage3DProc) ( GLenum target, GLint level, GLenum internalFormat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
typedef void (APIENTRY * GLTexSubImage3DProc) ( GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
typedef void (APIENTRY * GLCopyTexSubImageProc) ( GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height );
typedef void (APIENTRY * GLUBuild3DMipMapsProc) ( GLenum target, GLint internalFormat, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *data);
bool _isTexture3DSupported;
bool _isTexture3DFast;
GLint _maxTexture3DSize;
@@ -137,6 +138,11 @@ class SG_EXPORT Texture3D : public Texture
* only be created with the graphics context associated with ContextID..*/
static const Extensions* getExtensions(uint contextID,bool createIfNotInitalized);
/** setExtensions 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(uint contextID,Extensions* extensions);
protected :
virtual ~Texture3D();

42
src/osg/Texture3D.cpp
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@@ -276,21 +276,55 @@ void Texture3D::copyTexSubImage3D(State& state, int xoffset, int yoffset, int zo
}
}
typedef buffered_value< ref_ptr<Texture3D::Extensions> > BufferedExtensions;
static BufferedExtensions s_extensions;
const Texture3D::Extensions* Texture3D::getExtensions(uint contextID,bool createIfNotInitalized)
{
typedef buffered_value< ref_ptr<Extensions> > BufferedExtensions;
static BufferedExtensions s_extensions;
if (!s_extensions[contextID] && createIfNotInitalized) s_extensions[contextID] = new Extensions;
return s_extensions[contextID].get();
}
void Texture3D::setExtensions(uint contextID,Extensions* extensions)
{
s_extensions[contextID] = extensions;
}
#ifndef GL_MAX_3D_TEXTURE_SIZE
#define GL_MAX_3D_TEXTURE_SIZE 0x8073
#endif
Texture3D::Extensions::Extensions()
{
setupGLExtenions();
}
Texture3D::Extensions::Extensions(const Extensions& rhs):
Referenced()
{
_isTexture3DSupported = rhs._isTexture3DSupported;
_isTexture3DFast = rhs._isTexture3DFast;
_maxTexture3DSize = rhs._maxTexture3DSize;
_glTexImage3D = rhs._glTexImage3D;
_glTexSubImage3D = rhs._glTexSubImage3D;
_glCopyTexSubImage3D = rhs._glCopyTexSubImage3D;
_gluBuild3DMipmaps = rhs._gluBuild3DMipmaps;
}
void Texture3D::Extensions::lowestCommonDenominator(const Extensions& rhs)
{
if (!rhs._isTexture3DSupported) _isTexture3DSupported = false;
if (!rhs._isTexture3DFast) _isTexture3DFast = false;
if (rhs._maxTexture3DSize<_maxTexture3DSize) _maxTexture3DSize = rhs._maxTexture3DSize;
if (!rhs._glTexImage3D) _glTexImage3D = 0;
if (!rhs._glTexSubImage3D) _glTexSubImage3D = 0;
if (!rhs._glCopyTexSubImage3D) _glCopyTexSubImage3D = 0;
if (!rhs._gluBuild3DMipmaps) _gluBuild3DMipmaps = 0;
}
void Texture3D::Extensions::setupGLExtenions()
{
_isTexture3DFast = isGLExtensionSupported("GL_EXT_texture3D");