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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 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

   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

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