We now keep a local copy of the Google Fonts Axis Registry textproto …

…files

so that the checks do not need to keep always fetch them online at runtime.
These files should not change too often, but we should be careful to check for updates on our FontBakery releases.
(issue fonttools#3022)

CHANGELOG.md

@@ -3,6 +3,9 @@ A more detailed list of changes is available in the corresponding milestones for
 
 
 ## 0.7.32 (2020-Oct-??)
+### Note-worthy code changes
+  - We now keep a local copy of the Google Fonts Axis Registry textproto files so that the checks do not need to keep always fetch them online at runtime. These files should not change too often, but we should be careful to check for updates on our FontBakery releases. (issue #3022)
+
 ### New checks
   - **[com.google.fonts/check/metadata/gf-axisregistry_valid_tags]:** VF axis tags are registered on GF Axis Registry (issue #3010)
   - **[com.google.fonts/check/metadata/gf-axisregistry_bounds]:** VF axes have ranges compliant to the bounds specified on the GF Axis Registry (issue #3022)

Lib/fontbakery/axes.proto

@@ -0,0 +1,38 @@
+syntax = "proto2";
+// GF Axis Registry Protos
+
+// An axis in the GF Axis Registry
+message AxisProto {
+  // Axis tag
+  optional string tag = 1;
+
+  // Display name for axis, e.g. "Optical size" for 'opsz'
+  // Like 'Name' in
+  // https://docs.microsoft.com/en-us/typography/opentype/spec/dvaraxistag_opsz
+  optional string display_name = 7;
+
+  // Lower bound for the axis
+  optional float min_value = 2;
+
+  // The default position to use and to prefer for exemplars
+  optional float default_value = 3;
+
+  // Upper bound for the axis
+  optional float max_value = 4;
+
+  // Input values for this axis must aligned to 10^precision
+  optional int32 precision = 5;
+
+  // Fallback positions along the axis
+  repeated FallbackProto fallback = 6;
+
+  // Short descriptive paragraph
+  optional string description = 8;
+
+  // Next = 9
+}
+
+message FallbackProto {
+  optional string name = 1;
+  optional float value = 2;
+}

Lib/fontbakery/data/casual.textproto

@@ -0,0 +1,19 @@
+# CASL based on https://github.com/arrowtype/Recursive#variable-axes
+tag: "CASL"
+display_name: "Casual"
+min_value: 0
+max_value: 1
+default_value: 0
+precision: -2
+fallback {
+  name: "Linear"
+  value: 0
+}
+fallback {
+  name: "Casual"
+  value: 1
+}
+description:
+  "Along this axis, letterforms adjust in stroke curvature, contrast, and"
+  " terminals to go from a sturdy, rational 'Linear' style to a friendly,"
+  " energetic 'Casual' style."

Lib/fontbakery/data/cursive.textproto

@@ -0,0 +1,24 @@
+# CRSV based on https://github.com/arrowtype/Recursive#variable-axes
+tag: "CRSV"
+display_name: "Cursive"
+min_value: 0
+max_value: 1
+default_value: 0.5
+precision: -1
+fallback {
+  name: "Roman"
+  value: 0
+}
+fallback {
+  name: "Auto"
+  value: 0.5
+}
+fallback {
+  name: "Cursive"
+  value: 1
+}
+description:
+  "Controls the substitution of cursive forms along the Slant axis. 'Off' (0)"
+  " maintains Roman letterforms such as a double-story a and g, 'Auto' (0.5)"
+  " allows for Cursive substitution, and 'On' (1) asserts cursive forms even"
+  " in upright text with a Slant of 0."

Lib/fontbakery/data/grade.textproto

@@ -0,0 +1,33 @@
+# GRAD based on https://github.com/TypeNetwork/Opentype-1.8-Axis-Proposal/blob/gh-pages/proposal/Grade/ProposalSummary.md
+tag: "GRAD"
+display_name: "Grade"
+min_value: -1
+max_value: 1
+default_value: 0
+precision: -1
+fallback {
+  name: "Full Negative"
+  value: -1
+}
+fallback {
+  name: "Half Negative"
+  value: -0.5
+}
+fallback {
+  name: "Normal"
+  value: 0
+}
+fallback {
+  name: "Half Positive"
+  value: 0.5
+}
+fallback {
+  name: "Full Positive"
+  value: 1
+}
+description:
+  "Finesse the style from lighter to bolder in typographic color, by varying"
+  " stroke thicknesses or other forms, without any changes overall width,"
+  " inter-letter spacing, or kerning, so there are no changes to line breaks"
+  " or page layout. Negative grade makes the style lighter, while positive"
+  " grade makes it bolder. "

Lib/fontbakery/data/italic.textproto

@@ -0,0 +1,19 @@
+# ital based on https://docs.microsoft.com/en-us/typography/opentype/spec/dvaraxistag_ital
+tag: "ital"
+display_name: "Italic"
+min_value: 0
+max_value: 1
+default_value: 0
+precision: -1
+fallback {
+  name: "Roman"
+  value: 0
+}
+fallback {
+  name: "Italic"
+  value: 1
+}
+description:
+  "Adjust the style from roman to italic. This can be provided as"
+  " a continuous range within a single font file, like most axes, or as a"
+  " toggle between two roman and italic files that form a family as a pair."

Lib/fontbakery/data/monospace.textproto

@@ -0,0 +1,23 @@
+# FOR TESTING ONLY [for now anyway]
+# MONO based on https://github.com/arrowtype/Recursive#variable-axes
+tag: "MONO"
+display_name: "Monospace"
+min_value: 0
+max_value: 1
+default_value: 0
+precision: -2
+fallback {
+  name: "Proportional"
+  value: 0
+}
+fallback {
+  name: "Monospace"
+  value: 1
+}
+description:
+  "Adjust the style from proportional (natural widths, default) to"
+  " monospace (fixed width). Monospace is when all glyphs have the same"
+  " total character width, and more wide or narrow letter proportions to fill"
+  " the space such as a narrower 'w' or wider 'r.' Proportionally spaced"
+  "fonts have letters drawn with more typical proportions, and each glyph"
+  "takes up a unique amount of space on a line."