:right-sidebar: True

MemoryFormat
===================================================================

.. currentmodule:: gi.repository.Gdk





.. class:: MemoryFormat
   :no-contents-entry:






``GdkMemoryFormat`` describes formats that image data can have in memory.

It describes formats by listing the contents of the memory passed to it.
So ``GDK_MEMORY_A8R8G8B8`` will be 1 byte (8 bits) of alpha, followed by a
byte each of red, green and blue. It is not endian-dependent, so
``CAIRO_FORMAT_ARGB32`` is represented by different ``GdkMemoryFormats``
on architectures with different endiannesses.

Its naming is modelled after
`VkFormat <https://www.khronos.org/registry/vulkan/specs/1.0/html/vkspec.html#VkFormat>`_
for details).













Fields
------

.. rst-class:: interim-class

.. class:: MemoryFormat
   :no-index:
   

   .. attribute:: A16

      One guint16 value; for alpha.



      .. versionadded:: 4.12





   .. attribute:: A16_FLOAT

      One half-float value; for alpha.



      .. versionadded:: 4.12





   .. attribute:: A32_FLOAT

      One float value; for alpha.



      .. versionadded:: 4.12





   .. attribute:: A8

      One byte; for alpha.



      .. versionadded:: 4.12





   .. attribute:: A8B8G8R8

      4 bytes; for alpha, blue, green, red.







   .. attribute:: A8B8G8R8_PREMULTIPLIED

      4 bytes; for alpha, blue, green, red, The color values are premultiplied with
      the alpha value.



      .. versionadded:: 4.14





   .. attribute:: A8R8G8B8

      4 bytes; for alpha, red, green, blue.







   .. attribute:: A8R8G8B8_PREMULTIPLIED

      4 bytes; for alpha, red, green, blue.
      The color values are premultiplied with the alpha value.







   .. attribute:: B8G8R8

      3 bytes; for blue, green, red. The data is opaque.







   .. attribute:: B8G8R8A8

      4 bytes; for blue, green, red, alpha.







   .. attribute:: B8G8R8A8_PREMULTIPLIED

      4 bytes; for blue, green, red, alpha.
      The color values are premultiplied with the alpha value.







   .. attribute:: B8G8R8X8

      4 bytes; for blue, green, red, unused.



      .. versionadded:: 4.14





   .. attribute:: G16

      One guint16 value; for grayscale. The data is opaque.



      .. versionadded:: 4.12





   .. attribute:: G16A16

      2 guint16 values; for grayscale, alpha.



      .. versionadded:: 4.12





   .. attribute:: G16A16_PREMULTIPLIED

      2 guint16 values; for grayscale, alpha. The color values are premultiplied
      with the alpha value.



      .. versionadded:: 4.12





   .. attribute:: G8

      One byte; for grayscale. The data is opaque.



      .. versionadded:: 4.12





   .. attribute:: G8A8

      2 bytes; for grayscale, alpha.



      .. versionadded:: 4.12





   .. attribute:: G8A8_PREMULTIPLIED

      2 bytes; for grayscale, alpha. The color values are premultiplied with the
      alpha value.



      .. versionadded:: 4.12





   .. attribute:: N_FORMATS

      The number of formats. This value will change as
      more formats get added, so do not rely on its concrete integer.







   .. attribute:: R16G16B16

      3 guint16 values; for red, green, blue.



      .. versionadded:: 4.6





   .. attribute:: R16G16B16A16

      4 guint16 values; for red, green, blue, alpha.



      .. versionadded:: 4.6





   .. attribute:: R16G16B16A16_FLOAT

      4 half-float values; for red, green, blue and alpha.



      .. versionadded:: 4.6





   .. attribute:: R16G16B16A16_FLOAT_PREMULTIPLIED

      4 half-float values; for red, green, blue and alpha. The color values are
      premultiplied with the alpha value.



      .. versionadded:: 4.6





   .. attribute:: R16G16B16A16_PREMULTIPLIED

      4 guint16 values; for red, green, blue, alpha. The color values are
      premultiplied with the alpha value.



      .. versionadded:: 4.6





   .. attribute:: R16G16B16_FLOAT

      3 half-float values; for red, green, blue. The data is opaque.



      .. versionadded:: 4.6





   .. attribute:: R32G32B32A32_FLOAT

      4 float values; for red, green, blue and alpha.



      .. versionadded:: 4.6





   .. attribute:: R32G32B32A32_FLOAT_PREMULTIPLIED

      4 float values; for red, green, blue and alpha. The color values are
      premultiplied with the alpha value.



      .. versionadded:: 4.6





   .. attribute:: R32G32B32_FLOAT

      3 float values; for red, green, blue.







   .. attribute:: R8G8B8

      3 bytes; for red, green, blue. The data is opaque.







   .. attribute:: R8G8B8A8

      4 bytes; for red, green, blue, alpha.







   .. attribute:: R8G8B8A8_PREMULTIPLIED

      4 bytes; for red, green, blue, alpha
      The color values are premultiplied with the alpha value.







   .. attribute:: R8G8B8X8

      4 bytes; for red, green, blue, unused.



      .. versionadded:: 4.14





   .. attribute:: X8B8G8R8

      4 bytes; for unused, blue, green, red.



      .. versionadded:: 4.14





   .. attribute:: X8R8G8B8

      4 bytes; for unused, red, green, blue.



      .. versionadded:: 4.14