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Merge a few checks into opentype/fvar/regular_coords_correct
Following FontSpector. New check: - opentype/fvar/regular_coords_correct Old checks: - opentype/varfont/regular_ital_coord - opentype/varfont/regular_opsz_coord - opentype/varfont/regular_slnt_coord - opentype/varfont/regular_wdth_coord - opentype/varfont/regular_wght_coord On the OpenType profile. (issue fonttools#4865)
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Lib/fontbakery/checks/opentype_fvar_regular_coords_correct.py
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,161 +1,60 @@ | ||
| from fontbakery.prelude import check, Message, FAIL, PASS, WARN | ||
| from fontbakery.prelude import check, Message, FAIL, WARN | ||
|
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|
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||
| @check( | ||
| id="opentype/varfont/regular_wght_coord", | ||
| id="opentype/fvar/regular_coords_correct", | ||
| rationale=""" | ||
| According to the OpenType spec's | ||
| registered design-variation tag 'wght' available at | ||
| https://docs.microsoft.com/en-gb/typography/opentype/spec/dvaraxistag_wght | ||
| If a variable font has a 'wght' (Weight) axis, then the coordinate of | ||
| its 'Regular' instance is required to be 400. | ||
| """, | ||
| conditions=["is_variable_font", "has_wght_axis"], | ||
| proposal="https://github.com/fonttools/fontbakery/issues/1707", | ||
| ) | ||
| def check_varfont_regular_wght_coord(ttFont, regular_wght_coord): | ||
| """The variable font 'wght' (Weight) axis coordinate must be 400 on the | ||
| 'Regular' instance.""" | ||
|
|
||
| if regular_wght_coord is None: | ||
| yield FAIL, Message("no-regular-instance", '"Regular" instance not present.') | ||
| elif regular_wght_coord == 400: | ||
| yield PASS, "Regular:wght is 400." | ||
| else: | ||
| yield FAIL, Message( | ||
| "wght-not-400", | ||
| f'The "wght" axis coordinate of' | ||
| f' the "Regular" instance must be 400.' | ||
| f" Got {regular_wght_coord} instead.", | ||
| ) | ||
|
|
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|
|
||
| @check( | ||
| id="opentype/varfont/regular_wdth_coord", | ||
| rationale=""" | ||
| According to the OpenType spec's | ||
| registered design-variation tag 'wdth' available at | ||
| https://docs.microsoft.com/en-gb/typography/opentype/spec/dvaraxistag_wdth | ||
| If a variable font has a 'wdth' (Width) axis, then the coordinate of | ||
| its 'Regular' instance is required to be 100. | ||
| """, | ||
| conditions=["is_variable_font", "has_wdth_axis"], | ||
| proposal="https://github.com/fonttools/fontbakery/issues/1707", | ||
| ) | ||
| def check_varfont_regular_wdth_coord(ttFont, regular_wdth_coord): | ||
| """ | ||
| The variable font 'wdth' (Width) axis coordinate must be 100 on the 'Regular' | ||
| instance. | ||
| """ | ||
|
|
||
| if regular_wdth_coord is None: | ||
| yield FAIL, Message("no-regular-instance", '"Regular" instance not present.') | ||
| elif regular_wdth_coord == 100: | ||
| yield PASS, "Regular:wdth is 100." | ||
| else: | ||
| yield FAIL, Message( | ||
| "wdth-not-100", | ||
| f'The "wdth" axis coordinate of' | ||
| f' the "Regular" instance must be 100.' | ||
| f" Got {regular_wdth_coord} as a default value instead.", | ||
| ) | ||
|
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|
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||
| @check( | ||
| id="opentype/varfont/regular_slnt_coord", | ||
| rationale=""" | ||
| According to the OpenType spec's | ||
| registered design-variation tag 'slnt' available at | ||
| https://docs.microsoft.com/en-gb/typography/opentype/spec/dvaraxistag_slnt | ||
| If a variable font has a 'slnt' (Slant) axis, then the coordinate of | ||
| its 'Regular' instance is required to be zero. | ||
| According to the Open-Type spec's registered design-variation tags,instances in a variable font should have certain prescribed values. | ||
| If a variable font has a 'wght' (Weight) axis, the valid coordinate range is 1-1000. | ||
| If a variable font has a 'wdth' (Width) axis, the valid numeric range is strictly greater than zero. | ||
| If a variable font has a 'slnt' (Slant) axis, then the coordinate of its 'Regular' instance is required to be 0. | ||
| If a variable font has a 'ital' (Slant) axis, then the coordinate of its 'Regular' instance is required to be 0. | ||
| """, | ||
| conditions=["is_variable_font", "has_slnt_axis"], | ||
| proposal="https://github.com/fonttools/fontbakery/issues/1707", | ||
| conditions=["is_variable_font"], | ||
| proposal=[ | ||
| "https://github.com/fonttools/fontbakery/issues/1707", | ||
| "https://github.com/fonttools/fontbakery/issues/2572", | ||
| ], | ||
| ) | ||
| def check_varfont_regular_slnt_coord(ttFont, regular_slnt_coord): | ||
| """ | ||
| The variable font 'slnt' (Slant) axis coordinate must be zero on the 'Regular' | ||
| instance. | ||
| """ | ||
|
|
||
| if regular_slnt_coord is None: | ||
| yield FAIL, Message("no-regular-instance", '"Regular" instance not present.') | ||
| elif regular_slnt_coord == 0: | ||
| yield PASS, "Regular:slnt is zero." | ||
| else: | ||
| yield FAIL, Message( | ||
| "slnt-not-0", | ||
| f'The "slnt" axis coordinate of' | ||
| f' the "Regular" instance must be zero.' | ||
| f" Got {regular_slnt_coord} as a default value instead.", | ||
| ) | ||
|
|
||
|
|
||
| @check( | ||
| id="opentype/varfont/regular_ital_coord", | ||
| rationale=""" | ||
| According to the OpenType spec's | ||
| registered design-variation tag 'ital' available at | ||
| https://docs.microsoft.com/en-gb/typography/opentype/spec/dvaraxistag_ital | ||
| If a variable font has a 'ital' (Italic) axis, then the coordinate of | ||
| its 'Regular' instance is required to be zero. | ||
| """, | ||
| conditions=["is_variable_font", "has_ital_axis"], | ||
| proposal="https://github.com/fonttools/fontbakery/issues/1707", | ||
| ) | ||
| def check_varfont_regular_ital_coord(ttFont, regular_ital_coord): | ||
| """ | ||
| The variable font 'ital' (Italic) axis coordinate must be zero on the 'Regular' | ||
| instance. | ||
| """ | ||
|
|
||
| if regular_ital_coord is None: | ||
| yield FAIL, Message("no-regular-instance", '"Regular" instance not present.') | ||
| elif regular_ital_coord == 0: | ||
| yield PASS, "Regular:ital is zero." | ||
| else: | ||
| yield FAIL, Message( | ||
| "ital-not-0", | ||
| f'The "ital" axis coordinate of' | ||
| f' the "Regular" instance must be zero.' | ||
| f" Got {regular_ital_coord} as a default value instead.", | ||
| ) | ||
|
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|
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||
| @check( | ||
| id="opentype/varfont/regular_opsz_coord", | ||
| rationale=""" | ||
| According to the OpenType spec's | ||
| registered design-variation tag 'opsz' available at | ||
| https://docs.microsoft.com/en-gb/typography/opentype/spec/dvaraxistag_opsz | ||
| If a variable font has an 'opsz' (Optical Size) axis, then | ||
| the coordinate of its 'Regular' instance is recommended to be | ||
| a value in the range 10 to 16. | ||
| """, | ||
| conditions=["is_variable_font", "has_opsz_axis"], | ||
| proposal="https://github.com/fonttools/fontbakery/issues/1707", | ||
| ) | ||
| def check_varfont_regular_opsz_coord(ttFont, regular_opsz_coord): | ||
| """ | ||
| The variable font 'opsz' (Optical Size) axis coordinate should be between 10 and 16 | ||
| on the 'Regular' instance. | ||
| """ | ||
|
|
||
| if regular_opsz_coord is None: | ||
| def check_fvar_regular_coords_correct( | ||
| ttFont, | ||
| regular_wght_coord, | ||
| regular_wdth_coord, | ||
| regular_slnt_coord, | ||
| regular_ital_coord, | ||
| regular_opsz_coord, | ||
| ): | ||
| """Axes and named instances fall within correct ranges?""" | ||
|
|
||
| REGULAR_COORDINATE_EXPECTATIONS = [ | ||
| ("wght", 400, regular_wght_coord), | ||
| ("wdth", 100, regular_wdth_coord), | ||
| ("slnt", 0, regular_slnt_coord), | ||
| ("ital", 0, regular_ital_coord), | ||
| ] | ||
|
|
||
| if ( | ||
| regular_wght_coord is None | ||
| and regular_wdth_coord is None | ||
| and regular_slnt_coord is None | ||
| and regular_ital_coord is None | ||
| and regular_opsz_coord is None | ||
| ): | ||
| yield FAIL, Message("no-regular-instance", '"Regular" instance not present.') | ||
| elif regular_opsz_coord >= 10 and regular_opsz_coord <= 16: | ||
| yield PASS, f"Regular:opsz coordinate ({regular_opsz_coord}) looks good." | ||
| else: | ||
| return | ||
|
|
||
| for axis, expected, actual in REGULAR_COORDINATE_EXPECTATIONS: | ||
| if actual is not None and actual != expected: | ||
| yield FAIL, Message( | ||
| f"{axis}-not-{expected}", | ||
| f"Regular instance has {axis} coordinate of {actual}," | ||
| f" expected {expected}", | ||
| ) | ||
|
|
||
| actual = regular_opsz_coord | ||
| if actual and not (10 <= actual <= 16): | ||
| yield WARN, Message( | ||
| "opsz-out-of-range", | ||
| f'The "opsz" (Optical Size) coordinate' | ||
| f' on the "Regular" instance is recommended' | ||
| f" to be a value in the range 10 to 16." | ||
| f" Got {regular_opsz_coord} instead.", | ||
| "opsz", | ||
| f"Regular instance has opsz coordinate of {actual}," | ||
| f" expected between 10 and 16", | ||
| ) |
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