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OpenGLExtensions Class Reference

Manages the use of OpenGL extensions, provides queries, OS-specific function pointer setup, and some OpenGL state management. More...

#include <OpenGLExtensions.h>

List of all members.

Public Types

enum rendenum {
ATI, NVIDIA, MSOFTGDI, MESAGL,
WIREGL, INTELSWR, GENERIC
}

Public Methods

void (APIENTRY *p_glLockArraysEXT)(GLint

void (APIENTRY *p_glUnlockArraysEXT)(void)

void (APIENTRY *p_glMultiDrawElementsEXT)(GLenum

void (APIENTRY *p_glGlobalAlphaFactorfSUN)(GLfloat)

void (APIENTRY *p_glPointParameterfARB)(GLenum

void (APIENTRY *p_glPointParameterfvARB)(GLenum

void (APIENTRY *p_glTexImage3D)(GLenum

OpenGLExtensions (void)

virtual ~OpenGLExtensions (void)

void find_renderer (void)

identify OpenGL accelerator/vendor. More...

void find_extensions (void)

initialize OpenGL extension state. More...

int vmdQueryExtension (const char *extname)

query OpenGL extension. More...

void vmdQueryGLVersion (int *major, int *minor, int *release)

query OpenGL version. More...

VMDGLXextFuncPtr vmdGetProcAddress (const char *)

get extension proc addr. More...

void PrintExtensions (void)

print out OpenGL extensions. More...

Public Attributes

int hasstereo

whether we have stereo capable buffer. More...

int stereodrawforced

must always draw in stereo, buggy driver. More...

int hasmultisample

whether we have multisample extension. More...

int nummultisamples

number of multisample samples available. More...

int hasstencilbuffer

whether display has a stencil buffer. More...

int hastex2d

whether renderer supports 2-D texturing. More...

int hastex3d

whether renderer supports 3-D texturing. More...

int hasmultidrawext

ARB/Sun GL_EXT_multi_draw. More...

int hascompiledvertexarrayext

ARB GL_EXT_compiled_vertex_array. More...

int hasrescalenormalext

ARB GL_RESCALE_NORMAL_EXT. More...

GLint multitextureunits

number of multitexture texture units. More...

int hasglarbtexnonpoweroftwo

OpenGL non-power-of-two texture ARB ext. More...

int hasglpointparametersext

glPointParameterfvARB. More...

int hasglpointspritearb

OpenGL point sprite ARB extension. More...

int hasglshadinglangarb

OpenGL Shading Language ARB extension. More...

int hasglshaderobjectsarb

OpenGL Shader Objects ARB extension. More...

int hasglvertexshaderarb

OpenGL Vertex Shader ARB extension. More...

int hasglfragmentshaderarb

OpenGL Fragment Shader ARB extension. More...

int hasglgeometryshader4arb

OpenGL Geometry Shader ARB extension. More...

int hasglsampleshadingarb

OpenGL Sample Shading ARB extension. More...

GLsizei

const GLsizei GLenum

const GLsizei const GLvoid GLsizei

GLfloat

GLint

GLenum

int oglmajor

major version of OpenGL renderer. More...

int oglminor

minor version of OpenGL renderer. More...

int oglrelease

release of OpenGL renderer. More...

rendenum oglrenderer

OpenGL renderer ID tag for important boards. More...

Detailed Description

Manages the use of OpenGL extensions, provides queries, OS-specific function pointer setup, and some OpenGL state management.

Definition at line 155 of file OpenGLExtensions.h.

Member Enumeration Documentation

enum OpenGLExtensions::rendenum

Enumeration values:

ATI

NVIDIA

MSOFTGDI

MESAGL

WIREGL

INTELSWR

GENERIC

Definition at line 218 of file OpenGLExtensions.h.

Constructor & Destructor Documentation

OpenGLExtensions::OpenGLExtensions ( void )

Definition at line 45 of file OpenGLExtensions.C.
References hascompiledvertexarrayext, hasglarbtexnonpoweroftwo, hasglfragmentshaderarb, hasglgeometryshader4arb, hasglpointparametersext, hasglpointspritearb, hasglsampleshadingarb, hasglshaderobjectsarb, hasglshadinglangarb, hasglvertexshaderarb, hasmultidrawext, hasmultisample, hasrescalenormalext, hasstencilbuffer, hastex2d, hastex3d, multitextureunits, and NULL.

OpenGLExtensions::~OpenGLExtensions ( void ) [virtual]

Definition at line 70 of file OpenGLExtensions.C.
References NULL, and vmddlclose.

Member Function Documentation

void OpenGLExtensions::find_extensions ( void )

initialize OpenGL extension state.

Definition at line 311 of file OpenGLExtensions.C.
References find_renderer, GLenum, GLfloat, GLint, GLsizei, hascompiledvertexarrayext, hasglarbtexnonpoweroftwo, hasglfragmentshaderarb, hasglgeometryshader4arb, hasglpointparametersext, hasglpointspritearb, hasglsampleshadingarb, hasglshaderobjectsarb, hasglshadinglangarb, hasglvertexshaderarb, hasmultidrawext, hasstencilbuffer, hastex2d, hastex3d, multitextureunits, NULL, oglmajor, oglminor, oglrelease, vmdGetProcAddress, vmdQueryExtension, vmdQueryGLVersion, and void.
Referenced by OpenGLRenderer::setup_initial_opengl_state.

void OpenGLExtensions::find_renderer ( void )

identify OpenGL accelerator/vendor.

Definition at line 283 of file OpenGLExtensions.C.
References ATI, GENERIC, INTELSWR, MESAGL, MSOFTGDI, NULL, NVIDIA, oglrenderer, and WIREGL.
Referenced by find_extensions, and OpenGLRenderer::setup_initial_opengl_state.

void OpenGLExtensions::PrintExtensions ( void )

print out OpenGL extensions.

Definition at line 522 of file OpenGLExtensions.C.
References multitextureunits, NULL, and nummultisamples.
Referenced by OpenGLRenderer::setup_initial_opengl_state.

VMDGLXextFuncPtr OpenGLExtensions::vmdGetProcAddress ( const char * )

get extension proc addr.

Definition at line 109 of file OpenGLExtensions.C.
References glXGetProcAddress, NULL, vmddlopen, vmddlsym, and VMDGLXextFuncPtr.
Referenced by find_extensions.

int OpenGLExtensions::vmdQueryExtension ( const char * extname )

query OpenGL extension.

Definition at line 75 of file OpenGLExtensions.C.
References n, and NULL.
Referenced by find_extensions, OpenGLDisplayDevice::open_window, and OpenGLRenderer::setup_initial_opengl_state.

void OpenGLExtensions::vmdQueryGLVersion ( int * major,

int * minor,

int * release

)

query OpenGL version.

Definition at line 225 of file OpenGLExtensions.C.
References NULL.
Referenced by find_extensions.

OpenGLExtensions::void ( APIENTRY * p_glTexImage3D )

OpenGLExtensions::void ( APIENTRY * p_glPointParameterfvARB )

OpenGLExtensions::void ( APIENTRY * p_glPointParameterfARB )

OpenGLExtensions::void ( APIENTRY * p_glGlobalAlphaFactorfSUN )

OpenGLExtensions::void ( APIENTRY * p_glMultiDrawElementsEXT )

OpenGLExtensions::void ( APIENTRY * p_glUnlockArraysEXT )

OpenGLExtensions::void ( APIENTRY * p_glLockArraysEXT )

Referenced by find_extensions.

Member Data Documentation

OpenGLExtensions::GLenum

Definition at line 189 of file OpenGLExtensions.h.

const GLsizei OpenGLExtensions::GLenum

Definition at line 185 of file OpenGLExtensions.h.
Referenced by find_extensions.

OpenGLExtensions::GLfloat

Definition at line 187 of file OpenGLExtensions.h.
Referenced by find_extensions.

OpenGLExtensions::GLint

Definition at line 189 of file OpenGLExtensions.h.
Referenced by find_extensions.

const GLsizei const GLvoid OpenGLExtensions::GLsizei

Definition at line 185 of file OpenGLExtensions.h.

OpenGLExtensions::GLsizei

Definition at line 189 of file OpenGLExtensions.h.
Referenced by find_extensions.

int OpenGLExtensions::hascompiledvertexarrayext

ARB GL_EXT_compiled_vertex_array.

Definition at line 169 of file OpenGLExtensions.h.
Referenced by find_extensions, and OpenGLExtensions.

int OpenGLExtensions::hasglarbtexnonpoweroftwo

OpenGL non-power-of-two texture ARB ext.

Definition at line 172 of file OpenGLExtensions.h.
Referenced by find_extensions, and OpenGLExtensions.

int OpenGLExtensions::hasglfragmentshaderarb

OpenGL Fragment Shader ARB extension.

Definition at line 178 of file OpenGLExtensions.h.
Referenced by find_extensions, OpenGLExtensions, and OpenGLRenderer::setup_initial_opengl_state.

int OpenGLExtensions::hasglgeometryshader4arb

OpenGL Geometry Shader ARB extension.

Definition at line 179 of file OpenGLExtensions.h.
Referenced by find_extensions, and OpenGLExtensions.

int OpenGLExtensions::hasglpointparametersext

glPointParameterfvARB.

Definition at line 173 of file OpenGLExtensions.h.
Referenced by find_extensions, and OpenGLExtensions.

int OpenGLExtensions::hasglpointspritearb

OpenGL point sprite ARB extension.

Definition at line 174 of file OpenGLExtensions.h.
Referenced by find_extensions, and OpenGLExtensions.

int OpenGLExtensions::hasglsampleshadingarb

OpenGL Sample Shading ARB extension.

Definition at line 180 of file OpenGLExtensions.h.
Referenced by find_extensions, and OpenGLExtensions.

int OpenGLExtensions::hasglshaderobjectsarb

OpenGL Shader Objects ARB extension.

Definition at line 176 of file OpenGLExtensions.h.
Referenced by find_extensions, OpenGLExtensions, and OpenGLRenderer::setup_initial_opengl_state.

int OpenGLExtensions::hasglshadinglangarb

OpenGL Shading Language ARB extension.

Definition at line 175 of file OpenGLExtensions.h.
Referenced by find_extensions, OpenGLExtensions, and OpenGLRenderer::setup_initial_opengl_state.

int OpenGLExtensions::hasglvertexshaderarb

OpenGL Vertex Shader ARB extension.

Definition at line 177 of file OpenGLExtensions.h.
Referenced by find_extensions, OpenGLExtensions, and OpenGLRenderer::setup_initial_opengl_state.

int OpenGLExtensions::hasmultidrawext

ARB/Sun GL_EXT_multi_draw.

Definition at line 168 of file OpenGLExtensions.h.
Referenced by find_extensions, and OpenGLExtensions.

int OpenGLExtensions::hasmultisample

whether we have multisample extension.

Definition at line 163 of file OpenGLExtensions.h.
Referenced by OpenGLRenderer::aa_off, OpenGLRenderer::aa_on, FltkOpenGLDisplayDevice::FltkOpenGLDisplayDevice, OpenGLPbufferDisplayDevice::init, OpenGLDisplayDevice::init, OpenGLDisplayDevice::open_window, and OpenGLExtensions.

int OpenGLExtensions::hasrescalenormalext

ARB GL_RESCALE_NORMAL_EXT.

Definition at line 170 of file OpenGLExtensions.h.
Referenced by OpenGLExtensions, and OpenGLRenderer::setup_initial_opengl_state.

int OpenGLExtensions::hasstencilbuffer

whether display has a stencil buffer.

Definition at line 165 of file OpenGLExtensions.h.
Referenced by OpenGLRenderer::enable_stencil_stereo, find_extensions, and OpenGLExtensions.

int OpenGLExtensions::hasstereo

whether we have stereo capable buffer.

Definition at line 161 of file OpenGLExtensions.h.
Referenced by OpenGLRenderer::clear, FltkOpenGLDisplayDevice::FltkOpenGLDisplayDevice, FreeVRDisplayDevice::FreeVRDisplayDevice, OpenGLRenderer::left, OpenGLDisplayDevice::open_window, OpenGLRenderer::right, and OpenGLRenderer::setup_initial_opengl_state.

int OpenGLExtensions::hastex2d

whether renderer supports 2-D texturing.

Definition at line 166 of file OpenGLExtensions.h.
Referenced by find_extensions, OpenGLExtensions, and OpenGLRenderer::setup_initial_opengl_state.

int OpenGLExtensions::hastex3d

whether renderer supports 3-D texturing.

Definition at line 167 of file OpenGLExtensions.h.
Referenced by OpenGLRenderer::build3Dmipmaps, find_extensions, OpenGLExtensions, OpenGLRenderer::require_volume_texture, and OpenGLRenderer::setup_initial_opengl_state.

GLint OpenGLExtensions::multitextureunits

number of multitexture texture units.

Definition at line 171 of file OpenGLExtensions.h.
Referenced by find_extensions, OpenGLExtensions, PrintExtensions, and OpenGLRenderer::setup_initial_opengl_state.

int OpenGLExtensions::nummultisamples

number of multisample samples available.

Definition at line 164 of file OpenGLExtensions.h.
Referenced by OpenGLDisplayDevice::open_window, and PrintExtensions.

int OpenGLExtensions::oglmajor

major version of OpenGL renderer.

Definition at line 221 of file OpenGLExtensions.h.
Referenced by find_extensions, and OpenGLRenderer::setup_initial_opengl_state.

int OpenGLExtensions::oglminor

minor version of OpenGL renderer.

Definition at line 222 of file OpenGLExtensions.h.
Referenced by find_extensions, and OpenGLRenderer::setup_initial_opengl_state.

int OpenGLExtensions::oglrelease

release of OpenGL renderer.

Definition at line 223 of file OpenGLExtensions.h.
Referenced by find_extensions.

rendenum OpenGLExtensions::oglrenderer

OpenGL renderer ID tag for important boards.

Definition at line 224 of file OpenGLExtensions.h.
Referenced by find_renderer, and OpenGLRenderer::setup_initial_opengl_state.

int OpenGLExtensions::stereodrawforced

must always draw in stereo, buggy driver.

Definition at line 162 of file OpenGLExtensions.h.
Referenced by OpenGLRenderer::clear, FltkOpenGLDisplayDevice::FltkOpenGLDisplayDevice, OpenGLRenderer::forced_stereo_draws, FreeVRDisplayDevice::FreeVRDisplayDevice, OpenGLRenderer::left, OpenGLDisplayDevice::open_window, OpenGLRenderer::right, and OpenGLRenderer::setup_initial_opengl_state.

The documentation for this class was generated from the following files:

Generated on Thu Oct 30 02:47:12 2025 for VMD (current) by

Public Types
enum	rendenum { ATI, NVIDIA, MSOFTGDI, MESAGL, WIREGL, INTELSWR, GENERIC }
Public Methods
	void (APIENTRY *p_glLockArraysEXT)(GLint
	void (APIENTRY *p_glUnlockArraysEXT)(void)
	void (APIENTRY *p_glMultiDrawElementsEXT)(GLenum
	void (APIENTRY *p_glGlobalAlphaFactorfSUN)(GLfloat)
	void (APIENTRY *p_glPointParameterfARB)(GLenum
	void (APIENTRY *p_glPointParameterfvARB)(GLenum
	void (APIENTRY *p_glTexImage3D)(GLenum
	OpenGLExtensions (void)
virtual	~OpenGLExtensions (void)
void	find_renderer (void)
	identify OpenGL accelerator/vendor. More...
void	find_extensions (void)
	initialize OpenGL extension state. More...
int	vmdQueryExtension (const char *extname)
	query OpenGL extension. More...
void	vmdQueryGLVersion (int major, int minor, int *release)
	query OpenGL version. More...
VMDGLXextFuncPtr	vmdGetProcAddress (const char *)
	get extension proc addr. More...
void	PrintExtensions (void)
	print out OpenGL extensions. More...
Public Attributes
int	hasstereo
	whether we have stereo capable buffer. More...
int	stereodrawforced
	must always draw in stereo, buggy driver. More...
int	hasmultisample
	whether we have multisample extension. More...
int	nummultisamples
	number of multisample samples available. More...
int	hasstencilbuffer
	whether display has a stencil buffer. More...
int	hastex2d
	whether renderer supports 2-D texturing. More...
int	hastex3d
	whether renderer supports 3-D texturing. More...
int	hasmultidrawext
	ARB/Sun GL_EXT_multi_draw. More...
int	hascompiledvertexarrayext
	ARB GL_EXT_compiled_vertex_array. More...
int	hasrescalenormalext
	ARB GL_RESCALE_NORMAL_EXT. More...
GLint	multitextureunits
	number of multitexture texture units. More...
int	hasglarbtexnonpoweroftwo
	OpenGL non-power-of-two texture ARB ext. More...
int	hasglpointparametersext
	glPointParameterfvARB. More...
int	hasglpointspritearb
	OpenGL point sprite ARB extension. More...
int	hasglshadinglangarb
	OpenGL Shading Language ARB extension. More...
int	hasglshaderobjectsarb
	OpenGL Shader Objects ARB extension. More...
int	hasglvertexshaderarb
	OpenGL Vertex Shader ARB extension. More...
int	hasglfragmentshaderarb
	OpenGL Fragment Shader ARB extension. More...
int	hasglgeometryshader4arb
	OpenGL Geometry Shader ARB extension. More...
int	hasglsampleshadingarb
	OpenGL Sample Shading ARB extension. More...
	GLsizei
const GLsizei	GLenum
const GLsizei const GLvoid	GLsizei
	GLfloat
	GLint
	GLenum
int	oglmajor
	major version of OpenGL renderer. More...
int	oglminor
	minor version of OpenGL renderer. More...
int	oglrelease
	release of OpenGL renderer. More...
rendenum	oglrenderer
	OpenGL renderer ID tag for important boards. More...