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# Script to preview fonts

     

       
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usage() {

     

       
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	printf '%b\n' "${0##*/} [-F FILE | -S | -t STRING] [OPTIONS]"                        \

     

       
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	              "actions:"                                                             \

     

       
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	              "\t-F FILE   - read from file"                                         \

     

       
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	              "\t-S        - read from stdin"                                        \

     

       
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	              "\t-t STRING - use a string"                                           \

     

       
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	              "\noptions:"                                                           \

     

       
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	              "\t-b SIZE   - border size"                                            \

     

       
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	              "\t-c COLORS - set the color of the text and background"               \

     

       
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	              "\t-f FONT   - which font to preview"                                  \

     

       
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	              "\t-h        - display this message"                                   \

     

       
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	              "\t-i        - do not generate an inverse image"                       \

     

       
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	              "\t-o FILE   - output file for the generated image"                    \

     

       
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	              "\t-s SIZE   - size of the font"                                       \

     

       
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	              "\ndefault values:"                                                    \

     

       
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	              "These values can be set before execution to change default values"    \

     

       
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	              "\tPREFON_ACTION=text (file, stdin, or text)"                          \

     

       
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	              "\tPREFON_BORDER_SIZE=16"                                              \

     

       
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	              "\tPREFON_COLORS=\"000000,ffffff\""                                    \

     

       
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	              "\tPREFON_FONT=\"monospace\""                                          \

     

       
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	              "\tPREFON_OUTPUT=\"/tmp/prefon.png\""                                  \

     

       
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	              "\tPREFON_SIZE=16"                                                     \

     

       
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	              "\tPREFON_TEXT=\"The quick brown fox jumps\\\n    over the lazy dog\"" \

     

       
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	printf '%b\n' "${0##*/} [-F FILE | -S | -t STRING] [OPTIONS]"                         \

     

       
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	              "actions:"                                                              \

     

       
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	              "\t-F FILE   - read from file"                                          \

     

       
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	              "\t-S        - read from stdin"                                         \

     

       
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	              "\t-t STRING - use a string"                                            \

     

       
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	              "\noptions:"                                                            \

     

       
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	              "\t-b SIZE   - border size"                                             \

     

       
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	              "\t-c COLORS - set the color of the text and background"                \

     

       
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	              "\t-f FONT   - which font to preview"                                   \

     

       
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	              "\t-h        - display this message"                                    \

     

       
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	              "\t-i        - generate the inverse image (horizontal, vertical, none)" \

     

       
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	              "\t-o FILE   - output file for the generated image"                     \

     

       
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	              "\t-s SIZE   - size of the font"                                        \

     

       
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	              "\ndefault values:"                                                     \

     

       
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	              "These values can be set before execution to change default values"     \

     

       
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	              "\tPREFON_ACTION=text (file, stdin, or text)"                           \

     

       
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	              "\tPREFON_BORDER_SIZE=16"                                               \

     

       
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	              "\tPREFON_COLORS=\"000000,ffffff\""                                     \

     

       
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	              "\tPREFON_FONT=\"monospace\""                                           \

     

       
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	              "\tPREFON_OUTPUT=\"/tmp/prefon.png\""                                   \

     

       
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	              "\tPREFON_SIZE=16"                                                      \

     

       
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	              "\tPREFON_TEXT=\"The quick brown fox jumps\\\n    over the lazy dog\""  \

     

       
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	              "\tPREFON_INVERSE=vertical (horizontal, vertical, none)"

     

       
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}

     

       
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