Spec-Zone .ru
спецификации, руководства, описания, API
Spec-Zone .ru
спецификации, руководства, описания, API
Библиотека разработчика Mac Разработчик
Поиск

 

Эта страница руководства является частью версии 5.0 Инструментов XCode

Получить эти инструменты:

Если Вы выполняете версию Инструментов XCode кроме 5,0, просматриваете документацию локально:

Читать страницы руководства

Страницы руководства предназначаются как справочник для людей, уже понимающих технологию.

  • Чтобы изучить, как руководство организовано или узнать о синтаксисе команды, прочитайте страницу руководства для страниц справочника (5).

  • Для получения дополнительной информации об этой технологии, ищите другую документацию в Библиотеке Разработчика Apple.

  • Для получения общей информации о записи сценариев оболочки, считайте Shell, Пишущий сценарий Учебника для начинающих.



GLPIXELMAP(3G)                                                                                GLPIXELMAP(3G)



NAME
       glPixelMapfv, glPixelMapuiv, glPixelMapusv - set up pixel transfer maps


C SPECIFICATION
       void glPixelMapfv( GLenum map,
                          GLint mapsize,
                          const GLfloat *values )
       void glPixelMapuiv( GLenum map,
                           GLint mapsize,
                           const GLuint *values )
       void glPixelMapusv( GLenum map,
                           GLint mapsize,
                           const GLushort *values )


PARAMETERS
       map      Specifies a symbolic map name.  Must be one of the following: GL_PIXEL_MAP_I_TO_I,
                GL_PIXEL_MAP_S_TO_S, GL_PIXEL_MAP_I_TO_R, GL_PIXEL_MAP_I_TO_G, GL_PIXEL_MAP_I_TO_B,
                GL_PIXEL_MAP_I_TO_A, GL_PIXEL_MAP_R_TO_R, GL_PIXEL_MAP_G_TO_G, GL_PIXEL_MAP_B_TO_B, or
                GL_PIXEL_MAP_A_TO_A.

       mapsize  Specifies the size of the map being defined.

       values   Specifies an array of mapsize values.

DESCRIPTION
       glPixelMap sets up translation tables, or maps, used by glCopyPixels, glCopyTexImage1D,
       glCopyTexImage2D, glCopyTexSubImage1D, glCopyTexSubImage2D, glCopyTexSubImage3D, glDrawPixels,
       glReadPixels, glTexImage1D, glTexImage2D, glTexImage3D, glTexSubImage1D, glTexSubImage2D, and
       glTexSubImage3D.  Additionally, if the GL_ARB_imaging subset is supported, the routines glColorTable,
       glColorSubTable, glConvolutionFilter1D, glConvolutionFilter2D, glHistogram, glMinmax, and
       glSeparableFilter2D.  Use of these maps is described completely in the glPixelTransfer reference
       page, and partly in the reference pages for the pixel and texture image commands.  Only the specifi-cation specification
       cation of the maps is described in this reference page.

       map is a symbolic map name, indicating one of ten maps to set.  mapsize specifies the number of
       entries in the map, and values is a pointer to an array of mapsize map values.

       The ten maps are as follows:

       GL_PIXEL_MAP_I_TO_I           Maps color indices to color indices.

       GL_PIXEL_MAP_S_TO_S           Maps stencil indices to stencil indices.

       GL_PIXEL_MAP_I_TO_R           Maps color indices to red components.

       GL_PIXEL_MAP_I_TO_G           Maps color indices to green components.

       GL_PIXEL_MAP_I_TO_B           Maps color indices to blue components.

       GL_PIXEL_MAP_I_TO_A           Maps color indices to alpha components.

       GL_PIXEL_MAP_R_TO_R           Maps red components to red components.

       GL_PIXEL_MAP_G_TO_G           Maps green components to green components.

       GL_PIXEL_MAP_B_TO_B           Maps blue components to blue components.

       GL_PIXEL_MAP_A_TO_A           Maps alpha components to alpha components.

       The entries in a map can be specified as single-precision floating-point numbers, unsigned short
       integers, or unsigned int integers.  Maps that store color component values (all but
       GL_PIXEL_MAP_I_TO_I and GL_PIXEL_MAP_S_TO_S) retain their values in floating-point , with unspecified
       mantissa and exponent sizes.  Floating-point values specified by glPixelMapfv are converted directly
       to the internal floating-point  of these maps, then clamped to the range [0,1].  Unsigned integer
       values specified by glPixelMapusv and glPixelMapuiv are converted linearly such that the largest rep-resentable representable
       resentable integer maps to 1.0, and 0 maps to 0.0.

       Maps that store indices, GL_PIXEL_MAP_I_TO_I and GL_PIXEL_MAP_S_TO_S, retain their values in fixed-point fixedpoint
       point , with an unspecified number of bits to the right of the binary point.  Floating-point values
       specified by glPixelMapfv are converted directly to the internal fixed-point  of these maps.
       Unsigned integer values specified by glPixelMapusv and glPixelMapuiv specify integer values, with all
       0's to the right of the binary point.

       The following table shows the initial sizes and values for each of the maps.  Maps that are indexed
       by either color or stencil indices must have mapsize = 2^n for some n or the results are undefined.
       The maximum allowable size for each map depends on the implementation and can be determined by call-ing calling
       ing glGet with argument GL_MAX_PIXEL_MAP_TABLE.  The single maximum applies to all maps; it is at
       least 32.

        map               Lookup Lookup Initial Initial
                                 Index  Value  Size    Value

        GL_PIXEL_MAP_I_TO_I      color  color    1       0
                                 index  index
        GL_PIXEL_MAP_S_TO_S     stencil stencil  1       0
                                 index   index
        GL_PIXEL_MAP_I_TO_R      color    R      1       0
                                 index
        GL_PIXEL_MAP_I_TO_G      color    G      1       0
                                 index
        GL_PIXEL_MAP_I_TO_B      color    B      1       0
                                 index
        GL_PIXEL_MAP_I_TO_A      color    A      1       0
                                 index
        GL_PIXEL_MAP_R_TO_R        R      R      1       0
        GL_PIXEL_MAP_G_TO_G        G      G      1       0
        GL_PIXEL_MAP_B_TO_B        B      B      1       0
        GL_PIXEL_MAP_A_TO_A        A      A      1       0


ERRORS
       GL_INVALID_ENUM is generated if map is not an accepted value.

       GL_INVALID_VALUE is generated if mapsize is less than one or larger than GL_MAX_PIXEL_MAP_TABLE.

       GL_INVALID_VALUE is generated if map is GL_PIXEL_MAP_I_TO_I, GL_PIXEL_MAP_S_TO_S,
       GL_PIXEL_MAP_I_TO_R, GL_PIXEL_MAP_I_TO_G, GL_PIXEL_MAP_I_TO_B, or GL_PIXEL_MAP_I_TO_A, and mapsize is
       not a power of two.

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

ASSOCIATED GETS
       glGetPixelMap
       glGet with argument GL_PIXEL_MAP_I_TO_I_SIZE
       glGet with argument GL_PIXEL_MAP_S_TO_S_SIZE
       glGet with argument GL_PIXEL_MAP_I_TO_R_SIZE
       glGet with argument GL_PIXEL_MAP_I_TO_G_SIZE
       glGet with argument GL_PIXEL_MAP_I_TO_B_SIZE
       glGet with argument GL_PIXEL_MAP_I_TO_A_SIZE
       glGet with argument GL_PIXEL_MAP_R_TO_R_SIZE
       glGet with argument GL_PIXEL_MAP_G_TO_G_SIZE
       glGet with argument GL_PIXEL_MAP_B_TO_B_SIZE
       glGet with argument GL_PIXEL_MAP_A_TO_A_SIZE
       glGet with argument GL_MAX_PIXEL_MAP_TABLE

SEE ALSO
       glColorTable(3G), glColorSubTable(3G), glConvolutionFilter1D(3G), glConvolutionFilter2D(3G), glCopyPixels(3G),
       glCopyTexImage1D(3G), glCopyTexImage2D(3G), glCopyTexSubImage1D(3G), glCopyTexSubImage2D(3G), glDrawPixels(3G),
       glHistogram(3G), glMinmax(3G), glPixelStore(3G), glPixelTransfer(3G), glReadPixels(3G), glSeparableFilter2D(3G),
       glTexImage1D(3G), glTexImage2D(3G), glTexImage3D(3G), glTexSubImage1D(3G), glTexSubImage2D(3G), glTexSubImage3D(3G)




                                                                                              GLPIXELMAP(3G)

Сообщение о проблемах

Способ сообщить о проблеме с этой страницей руководства зависит от типа проблемы:

Ошибки содержания
Ошибки отчета в содержании этой документации к проекту OpenGL.
Отчеты об ошибках
Сообщите об ошибках в функциональности описанного инструмента или API через Генератор отчетов Ошибки.
Форматирование проблем
Отчет, форматирующий ошибки в интерактивной версии этих страниц со ссылками на отзыв ниже.