FGFS-4.1/OpenSceneGraph
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Added new buffered_value template class which encapsulates a std::vector but

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initializes the array to the number of graphics contexts, and automatically
expands the array when indices outside the current size are required.

Added new osg::Texture::Extensions nested class to handle extensions on a per
context basis.
This commit is contained in:
Robert Osfield
2002-09-05 11:42:55 +00:00
parent 9bab7a181f
commit bb0022175b
10 changed files with 287 additions and 167 deletions
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169
src/osg/Texture3D.cpp
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@@ -6,10 +6,6 @@
#include <string.h>
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);
using namespace osg;
@@ -78,18 +74,7 @@ int Texture3D::compare(const StateAttribute& sa) const
void Texture3D::setImage(Image* image)
{
// delete old texture objects.
for(TextureNameList::iterator itr=_handleList.begin();
itr!=_handleList.end();
++itr)
{
if (*itr != 0)
{
// contact global texture object handler to delete texture objects
// in appropriate context.
// glDeleteTextures( 1L, (const GLuint *)itr );
*itr = 0;
}
}
dirtyTextureObject();
_image = image;
}
@@ -97,18 +82,18 @@ void Texture3D::setImage(Image* image)
void Texture3D::apply(State& state) const
{
static bool s_texturing_supported = strncmp((const char*)glGetString(GL_VERSION),"1.2",3)>=0 ||
isGLExtensionSupported("GL_EXT_texture3D");
if (!s_texturing_supported)
{
notify(WARN)<<"Warning: Texture3D::apply(..) failed, 3D texturing is not support by your OpenGL drivers."<<std::endl;
return;
}
// get the contextID (user defined ID of 0 upwards) for the
// current OpenGL context.
const uint contextID = state.getContextID();
Extensions* extensions = getExtensions(contextID);
if (!extensions->isTexture3DSupported)
{
notify(WARN)<<"Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL driver."<<std::endl;
return;
}
// get the globj for the current contextID.
GLuint& handle = getTextureObject(contextID);
@@ -176,17 +161,13 @@ void Texture3D::applyTexImage3D(GLenum target, Image* image, State& state, GLsiz
if (!image || !image->data())
return;
static GLTexImage3DProc s_glTexImage3D = (GLTexImage3DProc) getGLExtensionFuncPtr("glTexImage3D","glTexImage3DEXT");
if (!s_glTexImage3D)
{
notify(WARN) << "Warning:: Texture3D::applyTexImage3D(..) failed, 3D texturing not supported by your OpenGL drivers."<<std::endl;
return;
}
// get the contextID (user defined ID of 0 upwards) for the
// current OpenGL context.
const uint contextID = state.getContextID();
Extensions* extensions = getExtensions(contextID);
// update the modified tag to show that it is upto date.
getModifiedTag(contextID) = image->getModifiedTag();
@@ -209,30 +190,23 @@ void Texture3D::applyTexImage3D(GLenum target, Image* image, State& state, GLsiz
if( _min_filter == LINEAR || _min_filter == NEAREST )
{
numMimpmapLevels = 1;
s_glTexImage3D( target, 0, _internalFormat,
image->s(), image->t(), image->r(), 0,
(GLenum)image->getPixelFormat(),
(GLenum)image->getDataType(),
image->data() );
extensions->glTexImage3D( target, 0, _internalFormat,
image->s(), image->t(), image->r(), 0,
(GLenum)image->getPixelFormat(),
(GLenum)image->getDataType(),
image->data() );
}
else
{
if(!image->isMipmap())
{
static GLUBuild3DMipMapsProc s_gluBuild3DMipmaps = (GLUBuild3DMipMapsProc) getGLUExtensionFuncPtr("gluBuild3DMipmaps");
if (!s_gluBuild3DMipmaps)
{
notify(WARN) << "Warning:: Texture3D::applyTexImage3D(..) failed, gluBuild3DMipmaps not supported by your OpenGL drivers."<<std::endl;
return;
}
numMimpmapLevels = 1;
s_gluBuild3DMipmaps( target, _internalFormat,
image->s(),image->t(),image->r(),
(GLenum)image->getPixelFormat(), (GLenum)image->getDataType(),
image->data() );
extensions->gluBuild3DMipmaps( target, _internalFormat,
image->s(),image->t(),image->r(),
(GLenum)image->getPixelFormat(), (GLenum)image->getDataType(),
image->data() );
}
else
@@ -253,11 +227,11 @@ void Texture3D::applyTexImage3D(GLenum target, Image* image, State& state, GLsiz
if (depth == 0)
depth = 1;
s_glTexImage3D( target, k, _internalFormat,
width, height, depth, 0,
(GLenum)image->getPixelFormat(),
(GLenum)image->getDataType(),
image->getMipmapData(k));
extensions->glTexImage3D( target, k, _internalFormat,
width, height, depth, 0,
(GLenum)image->getPixelFormat(),
(GLenum)image->getDataType(),
image->getMipmapData(k));
width >>= 1;
height >>= 1;
@@ -275,18 +249,11 @@ void Texture3D::applyTexImage3D(GLenum target, Image* image, State& state, GLsiz
void Texture3D::copyTexSubImage3D(State& state, int xoffset, int yoffset, int zoffset, int x, int y, int width, int height )
{
static GLCopyTexSubImageProc s_glCopyTexSubImage3D = (GLCopyTexSubImageProc) getGLExtensionFuncPtr("glCopyTexSubImage3D","glCopyTexSubImage3DEXT");
if (!s_glCopyTexSubImage3D)
{
notify(WARN) << "Warning:: Texture3D::copyTexSubImage3D(..) failed, 3D texture copy sub image not supported by your OpenGL drivers."<<std::endl;
return;
}
const uint contextID = state.getContextID();
// get the globj for the current contextID.
GLuint& handle = getTextureObject(contextID);
Extensions* extensions = getExtensions(contextID);
if (handle)
{
@@ -294,7 +261,7 @@ void Texture3D::copyTexSubImage3D(State& state, int xoffset, int yoffset, int zo
// we have a valid image
glBindTexture( GL_TEXTURE_3D, handle );
applyTexParameters(GL_TEXTURE_3D,state);
s_glCopyTexSubImage3D( GL_TEXTURE_3D, 0, xoffset,yoffset,zoffset, x, y, width, height);
extensions->glCopyTexSubImage3D( GL_TEXTURE_3D, 0, xoffset,yoffset,zoffset, x, y, width, height);
/* Redundant, delete later */
glBindTexture( GL_TEXTURE_3D, handle );
@@ -308,3 +275,83 @@ void Texture3D::copyTexSubImage3D(State& state, int xoffset, int yoffset, int zo
notify(WARN)<<"Warning: Texture3D::copyTexSubImage3D(..) failed, cannot not copy to a non existant texture."<<std::endl;
}
}
Texture3D::Extensions* Texture3D::getExtensions(uint contextID)
{
typedef buffered_value< ref_ptr<Extensions> > BufferedExtensions;
static BufferedExtensions s_extensions;
if (!s_extensions[contextID]) s_extensions[contextID] = new Extensions;
return s_extensions[contextID].get();
}
Texture3D::Extensions::Extensions()
{
isTexture3DFast = isGLExtensionSupported("GL_EXT_texture3D");
if (isTexture3DFast) isTexture3DSupported = true;
else isTexture3DSupported = strncmp((const char*)glGetString(GL_VERSION),"1.2",3)>=0;
glGetIntegerv(GL_MAX_3D_TEXTURE_SIZE, &maxTexture3DSize);
}
void Texture3D::Extensions::glTexImage3D( GLenum target, GLint level, GLenum internalFormat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels)
{
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);
static GLTexImage3DProc s_glTexImage3D = (GLTexImage3DProc) getGLExtensionFuncPtr("glTexImage3D","glTexImage3DEXT");
if (s_glTexImage3D)
{
(*s_glTexImage3D)( target, level, internalFormat, width, height, depth, border, format, type, pixels);
}
else
{
notify(WARN)<<"Error: glTexImage3D not supported by OpenGL driver"<<std::endl;
}
}
void Texture3D::Extensions::glTexSubImage3D( 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 * GLTexSubImage3DProc) ( GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
static GLTexSubImage3DProc s_glTexSubImage3D = (GLTexSubImage3DProc) getGLExtensionFuncPtr("glTexSubImage3D","glTexSubImage3DEXT");
if (s_glTexSubImage3D)
{
(*s_glTexSubImage3D)( target, level, xoffset, yoffset, zoffset, width, height, depth, format, type, pixels);
}
else
{
notify(WARN)<<"Error: glTexSubImage3D not supported by OpenGL driver"<<std::endl;
}
}
void Texture3D::Extensions::glCopyTexSubImage3D( GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height )
{
typedef void (APIENTRY * GLCopyTexSubImageProc) ( GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height );
static GLCopyTexSubImageProc s_glCopyTexSubImage3D = (GLCopyTexSubImageProc) getGLExtensionFuncPtr("glCopyTexSubImage3D","glCopyTexSubImage3DEXT");
if (s_glCopyTexSubImage3D)
{
(*s_glCopyTexSubImage3D)(target, level, xoffset, yoffset, zoffset, x, y, width, height);
}
else
{
notify(WARN)<<"Error: glCopyTexSubImage3D not supported by OpenGL driver"<<std::endl;
}
}
void Texture3D::Extensions::gluBuild3DMipmaps( GLenum target, GLint internalFormat, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *data)
{
typedef void (APIENTRY * GLUBuild3DMipMapsProc) ( GLenum target, GLint internalFormat, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *data);
static GLUBuild3DMipMapsProc s_gluBuild3DMipmaps = (GLUBuild3DMipMapsProc) getGLUExtensionFuncPtr("gluBuild3DMipmaps");
if (s_gluBuild3DMipmaps)
{
(*s_gluBuild3DMipmaps)(target, internalFormat, width, height, depth, format, type, data);
}
else
{
notify(WARN)<<"Error: gluBuild3DMipmaps not supported by OpenGL driver"<<std::endl;
}
}