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# Global Variables and Constants

`sge.``IMPLEMENTATION`

  A string indicating the name of the SGE implementation.

`sge.``ALIGN_LEFT`

  Flag indicating horizontal alignment to the left.

`sge.``ALIGN_CENTER`

  Flag indicating horizontal alignment to the center.

`sge.``ALIGN_RIGHT`

  Flag indicating horizontal alignment to the right.

`sge.``ALIGN_TOP`

  Flag indicating vertical alignment to the top

`sge.``ALIGN_MIDDLE`

  Flag indicating vertical alignment to the middle.

`sge.``ALIGN_BOTTOM`

  Flag indicating vertical alignment to the bottom.

`sge.``BLEND_NORMAL`

  Flag indicating normal blending.

`sge.``BLEND_RGBA_ADD`

  Flag indicating RGBA Addition blending: the red, green, blue, and alpha color values of the source are added to the respective color values of the destination, to a maximum of 255.

`sge.``BLEND_RGBA_SUBTRACT`

  Flag indicating RGBA Subtract blending: the red, green, blue, and alpha color values of the source are subtracted from the respective color values of the destination, to a minimum of 0.

`sge.``BLEND_RGBA_MULTIPLY`

  Flag indicating RGBA Multiply blending: the red, green, blue, and alpha color values of the source and destination are converted to values between 0 and 1 (divided by 255), the resulting destination color values are multiplied by the respective resulting source color values, and these results are converted back into values between 0 and 255 (multiplied by 255).

`sge.``BLEND_RGBA_SCREEN`

  Flag indicating RGBA Screen blending: the red, green, blue, and alpha color values of the source and destination are inverted (subtracted from 255) and converted to values between 0 and 1 (divided by 255), the resulting destination color values are multiplied by the respective resulting source color values, and these results are converted back into values between 0 and 255 (multiplied by 255) and inverted again (subtracted from 255).

`sge.``BLEND_RGBA_MINIMUM`

  Flag indicating RGBA Minimum (Darken Only) blending: the smallest respective red, green, blue, and alpha color values out of the source and destination are used.

`sge.``BLEND_RGBA_MAXIMUM`

  Flag indicating RGBA Maximum (Lighten Only) blending: the largest respective red, green, blue, and alpha color values out of the source and destination are used.

`sge.``BLEND_RGB_ADD`

  Flag indicating RGB Addition blending: the same thing as RGBA Addition blending (see `sge.BLEND_RGBA_ADD`) except the destination’s alpha values are not changed.

`sge.``BLEND_RGB_SUBTRACT`

  Flag indicating RGB Subtract blending: the same thing as RGBA Subtract blending (see `sge.BLEND_RGBA_SUBTRACT`) except the destination’s alpha values are not changed.

`sge.``BLEND_RGB_MULTIPLY`

  Flag indicating RGB Multiply blending: the same thing as RGBA Multiply blending (see `sge.BLEND_RGBA_MULTIPLY`) except the destination’s alpha values are not changed.

`sge.``BLEND_RGB_SCREEN`

  Flag indicating RGB Screen blending: the same thing as RGBA Screen blending (see `sge.BLEND_RGBA_SCREEN`) except the destination’s alpha values are not changed.

`sge.``BLEND_RGB_MINIMUM`

  Flag indicating RGB Minimum (Darken Only) blending: the same thing as RGBA Minimum blending (see `sge.BLEND_RGBA_MINIMUM`) except the destination’s alpha values are not changed.

`sge.``BLEND_RGB_MAXIMUM`

  Flag indicating RGB Maximum (Lighten Only) blending: the same thing as RGBA Maximum blending (see `sge.BLEND_RGBA_MAXIMUM`) except the destination’s alpha values are not changed.

`sge.``game`

  Stores the current `sge.Game` object. If there is no `sge.Game` object currently, this variable is set to `None`.

`sge.``image_directories`

  A list of directories where images can be found. Default is `./data/images`, `./data/sprites`, or `./data/backgrounds`, where `.` is the program directory.

`sge.``font_directories`

  A list of directories where font files can be found. Default is `./data/fonts`, where `.` is the program directory.

`sge.``sound_directories`

  A list of directories where sounds can be found. Default is `./data/sounds`, where `.` is the program directory.

`sge.``music_directories`

  A list of directories where music files can be found. Default is `./data/music`, where `.` is the program directory.

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