Страницы справочника OS X

Эта страница руководства является частью версии 5.0 Инструментов XCode

Читать страницы руководства

GLTEXSUBIMAGE3D(3G)                                                                      GLTEXSUBIMAGE3D(3G)



NAME
       glTexSubImage3D - specify a three-dimensional texture subimage


C SPECIFICATION
       void glTexSubImage3D( GLenum target,
                             GLint level,
                             GLint xoffset,
                             GLint yoffset,
                             GLint zoffset,
                             GLsizei width,
                             GLsizei height,
                             GLsizei depth,
                             GLenum format,
                             GLenum type,
                             const GLvoid *pixels )


PARAMETERS
       target   Specifies the target texture.  Must be GL_TEXTURE_3D.

       level    Specifies  the level-of-detail number.  Level 0 is the base image level.  Level n is the nth
                mipmap reduction image.

       xoffset  Specifies a texel offset in the x direction within the texture array.

       yoffset  Specifies a texel offset in the y direction within the texture array.

       zoffset  Specifies a texel offset in the z direction within the texture array.

       width    Specifies the width of the texture subimage.

       height   Specifies the height of the texture subimage.

       depth    Specifies the depth of the texture subimage.

       format   Specifies the format of the  pixel  data.   The  following  symbolic  values  are  accepted:
                GL_COLOR_INDEX,  GL_RED,  GL_GREEN,  GL_BLUE,  GL_ALPHA,  GL_RGB,  GL_BGR, GL_RGBA, GL_BGRA,
                GL_LUMINANCE, and GL_LUMINANCE_ALPHA.

       type     Specifies the data type of the pixel data.  The  following  symbolic  values  are  accepted:
                GL_UNSIGNED_BYTE,  GL_BYTE, GL_BITMAP, GL_UNSIGNED_SHORT, GL_SHORT, GL_UNSIGNED_INT, GL_INT,
                GL_FLOAT,   GL_UNSIGNED_BYTE_3_3_2,   GL_UNSIGNED_BYTE_2_3_3_REV,   GL_UNSIGNED_SHORT_5_6_5,
                GL_UNSIGNED_SHORT_5_6_5_REV,    GL_UNSIGNED_SHORT_4_4_4_4,    GL_UNSIGNED_SHORT_4_4_4_4_REV,
                GL_UNSIGNED_SHORT_5_5_5_1,      GL_UNSIGNED_SHORT_1_5_5_5_REV,      GL_UNSIGNED_INT_8_8_8_8,
                GL_UNSIGNED_INT_8_8_8_8_REV, GL_UNSIGNED_INT_10_10_10_2, and GL_UNSIGNED_INT_2_10_10_10_REV.

       pixels   Specifies a pointer to the image data in memory.

DESCRIPTION
       Texturing maps a portion of a specified texture image onto each graphical primitive for which textur-ing texturing
       ing  is enabled.  To enable and disable three-dimensional texturing, call glEnable and glDisable with
       argument GL_TEXTURE_3D.

       glTexSubImage3D redefines a contiguous subregion of an existing three-dimensional texture image.  The
       texels  referenced by pixels replace the portion of the existing texture array with x indices xoffset
       and xoffset + width - 1, inclusive, y indices yoffset and yoffset + height  -  1,  inclusive,  and  z
       indices  zoffset  and zoffset + depth - 1, inclusive.  This region may not include any texels outside
       the range of the texture array as it was originally specified.  It is not an error to specify a  sub-texture subtexture
       texture with zero width, height, or depth but such a specification has no effect.

NOTES
       glTexSubImage3D is available only if the GL version is 1.2 or greater.

       Texturing has no effect in color index mode.

       glPixelStore  and  glPixelTransfer  modes  affect  texture  images  in  exactly  the  way they affect
       glDrawPixels.

       Formats  GL_BGR,  and   GL_BGRA   and   types   GL_UNSIGNED_BYTE_3_3_2,   GL_UNSIGNED_BYTE_2_3_3_REV,
       GL_UNSIGNED_SHORT_5_6_5,            GL_UNSIGNED_SHORT_5_6_5_REV,           GL_UNSIGNED_SHORT_4_4_4_4,
       GL_UNSIGNED_SHORT_4_4_4_4_REV,       GL_UNSIGNED_SHORT_5_5_5_1,        GL_UNSIGNED_SHORT_1_5_5_5_REV,
       GL_UNSIGNED_INT_8_8_8_8,       GL_UNSIGNED_INT_8_8_8_8_REV,      GL_UNSIGNED_INT_10_10_10_2,      and
       GL_UNSIGNED_INT_2_10_10_10_REV are available only if the GL version is 1.2 or greater.

       When the GL_ARB_multitexture extension is supported, glTexSubImage3D  specifies  a  three-dimensional
       sub texture for the current texture unit, specified with glActiveTextureARB.

       When  the  GL_ARB_imaging extension is supported, the RGBA components specified in pixels may be pro-cessed processed
       cessed by the imaging pipeline.  See glTexImage3D for specific details.

ERRORS
       GL_INVALID_ENUM is generated if target is not GL_TEXTURE_3D.

       GL_INVALID_OPERATION is  generated  if  the  texture  array  has  not  been  defined  by  a  previous
       glTexImage3D operation.

       GL_INVALID_VALUE is generated if level is less than 0.

       GL_INVALID_VALUE may be generated if level is greater than log2(max), where max is the returned value
       of GL_MAX_TEXTURE_SIZE.

       GL_INVALID_VALUE is generated if xoffset < -b, xoffset + width >  (w-b),  yoffset<-b,  or  yoffset  +
       height  > (h-b), or zoffset < -b, or zoffset + depth > (d - b), where w is the GL_TEXTURE_WIDTH, h is
       the GL_TEXTURE_HEIGHT, d is the GL_TEXTURE_DEPTH and b is the border width of the texture image being
       modified.  Note that w, h, and d include twice the border width.

       GL_INVALID_VALUE is generated if width, height, or depth is less than 0.

       GL_INVALID_ENUM is generated if format is not an accepted
        constant.

       GL_INVALID_ENUM is generated if type is not a type constant.

       GL_INVALID_ENUM is generated if type is GL_BITMAP and format is not GL_COLOR_INDEX.

       GL_INVALID_OPERATION is generated if glTexSubImage3D is executed between the execution of glBegin and
       the corresponding execution of glEnd.

       GL_INVALID_OPERATION    is    generated    if    type    is    one     of     GL_UNSIGNED_BYTE_3_3_2,
       GL_UNSIGNED_BYTE_2_3_3_REV, GL_UNSIGNED_SHORT_5_6_5, or GL_UNSIGNED_SHORT_5_6_5_REV and format is not
       GL_RGB.

       GL_INVALID_OPERATION   is    generated    if    type    is    one    of    GL_UNSIGNED_SHORT_4_4_4_4,
       GL_UNSIGNED_SHORT_4_4_4_4_REV,        GL_UNSIGNED_SHORT_5_5_5_1,       GL_UNSIGNED_SHORT_1_5_5_5_REV,
       GL_UNSIGNED_INT_8_8_8_8,      GL_UNSIGNED_INT_8_8_8_8_REV,       GL_UNSIGNED_INT_10_10_10_2,       or
       GL_UNSIGNED_INT_2_10_10_10_REV and format is neither GL_RGBA nor GL_BGRA.

ASSOCIATED GETS
       glGetTexImage
       glIsEnabled with argument GL_TEXTURE_3D

SEE ALSO
       glActiveTextureARB(3G),  glCopyTexImage1D(3G),  glCopyTexImage2D(3G),  glCopyTexSubImage1D(3G),  glCopyTexSubImage2D(3G),
       glCopyTexSubImage3D(3G), glDrawPixels(3G), glPixelStore(3G), glPixelTransfer(3G), glTexEnv(3G),  glTexGen(3G),  glTexImage1D(3G),
       glTexImage2D(3G), glTexImage3D(3G), glTexSubImage1D(3G), glTexSubImage2D(3G), glTexParameter(3G)





                                                                                         GLTEXSUBIMAGE3D(3G)