sogltextureimageelement(3)
NAME
SoGLTextureImageElement - The SoGLTextureImageElement is used to
control the current GL texture.
This is a lazy element. It is evaluated in SoShape::shouldGLRender().
SYNOPSIS
#include <Inventor/elements/SoGLTextureImageElement.h> Inherits SoTextureImageElement. Public Member Functions virtual void init (SoState *state) FIXME: write doc. virtual void push (SoState *state) virtual void pop (SoState *state, const SoElement *prevTopElement) virtual SbBool isTextureSizeLegal (int xsize, int ysize, int zsize, int bytespertexel) Static Public Member Functions static SoType getClassTypeId (void) static int getClassStackIndex (void) static void * createInstance (void) static void initClass (void) static void set (SoState *const state, SoNode *const node, SoGLImage *image, const Model model, const SbColor &blendColor) static SoGLImage * get (SoState *state, Model &model, SbColor &blendcolor) static int32_t getMaxGLTextureSize (void) static SbBool hasTransparency (SoState *state) Protected Member Functions virtual ~SoGLTextureImageElement () virtual SbBool hasTransparency (void) const
Detailed Description
The SoGLTextureImageElement is used to control the current GL texture.
This is a lazy element. It is evaluated in SoShape::shouldGLRender().
Constructor & Destructor Documentation
- SoGLTextureImageElement::~SoGLTextureImageElement (void) [protected,
- virtual]
The destructor.
Member Function Documentation
- SoType SoGLTextureImageElement::getClassTypeId (void) [static]
- This static method returns the class type.
- Reimplemented from SoTextureImageElement.
- int SoGLTextureImageElement::getClassStackIndex (void) [static]
- This static method returns the state stack index for the class.
- Reimplemented from SoTextureImageElement.
- void * SoGLTextureImageElement::createInstance (void) [static]
- This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.
- Reimplemented from SoTextureImageElement.
- void SoGLTextureImageElement::initClass (void) [static]
- This static method initializes static data in the
SoGLTextureImageElement class. - Reimplemented from SoTextureImageElement.
- void SoGLTextureImageElement::set (SoState *const stateptr, SoNode *const
- node, SoGLImage * image, const Model model, const SbColor & blendColor)
[static]
Sets the current texture. Id didapply is TRUE, it is assumed that the texture image already is the current GL texture. Do not use this
feature unless you know what you're doing. - int32_t SoGLTextureImageElement::getMaxGLTextureSize (void) [static]
- The size returned by this function will just be a very coarse estimate
as it only uses the more or less obsoleted technique of calling
glGetIntegerv(GL_MAX_TEXTURE_SIZE). - For a better estimate, use
SoGLTextureImageElement::isTextureSizeLegal(). - Note that this function needs an OpenGL context to be made current for
it to work. Without that, you will most likely get a faulty return
value or even a crash. - SbBool SoGLTextureImageElement::isTextureSizeLegal (int xsize, int ysize,
- int zsize, int bytespertexel) [virtual]
Returns true if the texture with the given dimensions is supported by
the current OpenGL context. - If zsize==0, 2D texturing is assumed, else 3D texturing is assumed.
- This function uses OpenGL proxy textures and will fall back to what you
get from SoGLTextureImageElement::getMaxGLTextureSize() if proxy
textures are not supported (i.e. OpenGL version < 1.1 and
GL_EXT_texture not available). In the 3D case, 3D textures need to be
supported (OpenGL >= 1.2 or GL_EXT_texture3D). - Note that this function needs an OpenGL context to be made current for
it to work. Without that, you will most likely get a faulty return
value or even a crash. - This function is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API.
- Since:
Coin 2.0
- SbBool SoGLTextureImageElement::hasTransparency (SoState * state) [static]
- Return TRUE if at least one pixel in the current texture image is
transparent. - Since:
Coin 3.1
- SbBool SoGLTextureImageElement::hasTransparency (void) const [protected,
- virtual]
Called by containsTransparency(). Returns TRUE if image data has transparency. Default method does a very poor job of detecting this,
since it returns TRUE when the number of components are 2 or 4. Override whenever it is important to know this (SoGLTextureImageElement overrides it to avoid transparency handling where possible). - Reimplemented from SoTextureImageElement.
Author
- Generated automatically by Doxygen for Coin from the source code.