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fonttools/Tests/varLib/merger_test.py

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Start adding Tests/varLib/merger_test.py for COLRVariationMerger
2022-06-24 18:16:28 +01:00
from copy import deepcopy
import string
from fontTools.colorLib.builder import LayerListBuilder
from fontTools.misc.testTools import getXML
from fontTools.varLib.merger import COLRVariationMerger
from fontTools.varLib.models import VariationModel
from fontTools.ttLib import TTFont
from fontTools.ttLib.tables import otTables as ot
from fontTools.ttLib.tables.otBase import OTTableReader, OTTableWriter
import pytest
NO_VARIATION_INDEX = ot.NO_VARIATION_INDEX
def dump_xml(table, ttFont=None):
xml = getXML(table.toXML, ttFont)
print("[")
for line in xml:
print(f" {line!r},")
print("]")
return xml
def compile_decompile(table, ttFont):
writer = OTTableWriter(tableTag="COLR")
table.compile(writer, ttFont)
data = writer.getAllData()
reader = OTTableReader(data, tableTag="COLR")
table2 = table.__class__()
table2.decompile(reader, ttFont)
return table2
@pytest.fixture
def ttFont():
font = TTFont()
font.setGlyphOrder([".notdef"] + list(string.ascii_letters))
return font
def build_paint(data):
return LayerListBuilder().buildPaint(data)
class COLRVariationMergerTest:
@pytest.mark.parametrize(
"paints, expected_xml, expected_varIdxes",
[
pytest.param(
[
{
"Format": int(ot.PaintFormat.PaintSolid),
"PaletteIndex": 0,
"Alpha": 1.0,
},
{
"Format": int(ot.PaintFormat.PaintSolid),
"PaletteIndex": 0,
"Alpha": 1.0,
},
],
[
'<Paint Format="2"><!-- PaintSolid -->',
' <PaletteIndex value="0"/>',
' <Alpha value="1.0"/>',
"</Paint>",
],
[],
id="solid-same",
),
pytest.param(
[
{
"Format": int(ot.PaintFormat.PaintSolid),
"PaletteIndex": 0,
"Alpha": 1.0,
},
{
"Format": int(ot.PaintFormat.PaintSolid),
"PaletteIndex": 0,
"Alpha": 0.5,
},
],
[
'<Paint Format="3"><!-- PaintVarSolid -->',
' <PaletteIndex value="0"/>',
' <Alpha value="1.0"/>',
' <VarIndexBase value="0"/>',
"</Paint>",
],
[0],
id="solid-alpha",
),
pytest.param(
[
{
"Format": int(ot.PaintFormat.PaintLinearGradient),
"ColorLine": {
"Extend": int(ot.ExtendMode.PAD),
"ColorStop": [
{"StopOffset": 0.0, "PaletteIndex": 0, "Alpha": 1.0},
{"StopOffset": 1.0, "PaletteIndex": 1, "Alpha": 1.0},
],
},
"x0": 0,
"y0": 0,
"x1": 1,
"y1": 1,
"x2": 2,
"y2": 2,
},
{
"Format": int(ot.PaintFormat.PaintLinearGradient),
"ColorLine": {
"Extend": int(ot.ExtendMode.PAD),
"ColorStop": [
{"StopOffset": 0.1, "PaletteIndex": 0, "Alpha": 1.0},
{"StopOffset": 0.9, "PaletteIndex": 1, "Alpha": 1.0},
],
},
"x0": 0,
"y0": 0,
"x1": 1,
"y1": 1,
"x2": 2,
"y2": 2,
},
],
[
'<Paint Format="5"><!-- PaintVarLinearGradient -->',
" <ColorLine>",
' <Extend value="pad"/>',
" <!-- StopCount=2 -->",
' <ColorStop index="0">',
' <StopOffset value="0.0"/>',
' <PaletteIndex value="0"/>',
' <Alpha value="1.0"/>',
' <VarIndexBase value="0"/>',
" </ColorStop>",
' <ColorStop index="1">',
' <StopOffset value="1.0"/>',
' <PaletteIndex value="1"/>',
' <Alpha value="1.0"/>',
' <VarIndexBase value="2"/>',
" </ColorStop>",
" </ColorLine>",
' <x0 value="0"/>',
' <y0 value="0"/>',
' <x1 value="1"/>',
' <y1 value="1"/>',
' <x2 value="2"/>',
' <y2 value="2"/>',
" <VarIndexBase/>",
"</Paint>",
],
[0, NO_VARIATION_INDEX, 1, NO_VARIATION_INDEX],
id="linear_grad-stop-offsets",
),
pytest.param(
[
{
"Format": int(ot.PaintFormat.PaintLinearGradient),
"ColorLine": {
"Extend": int(ot.ExtendMode.PAD),
"ColorStop": [
{"StopOffset": 0.0, "PaletteIndex": 0, "Alpha": 1.0},
{"StopOffset": 1.0, "PaletteIndex": 1, "Alpha": 1.0},
],
},
"x0": 0,
"y0": 0,
"x1": 1,
"y1": 1,
"x2": 2,
"y2": 2,
},
{
"Format": int(ot.PaintFormat.PaintLinearGradient),
"ColorLine": {
"Extend": int(ot.ExtendMode.PAD),
"ColorStop": [
{"StopOffset": 0.0, "PaletteIndex": 0, "Alpha": 0.5},
{"StopOffset": 1.0, "PaletteIndex": 1, "Alpha": 1.0},
],
},
"x0": 0,
"y0": 0,
"x1": 1,
"y1": 1,
"x2": 2,
"y2": 2,
},
],
[
'<Paint Format="5"><!-- PaintVarLinearGradient -->',
" <ColorLine>",
' <Extend value="pad"/>',
" <!-- StopCount=2 -->",
' <ColorStop index="0">',
' <StopOffset value="0.0"/>',
' <PaletteIndex value="0"/>',
' <Alpha value="1.0"/>',
' <VarIndexBase value="0"/>',
" </ColorStop>",
' <ColorStop index="1">',
' <StopOffset value="1.0"/>',
' <PaletteIndex value="1"/>',
' <Alpha value="1.0"/>',
" <VarIndexBase/>",
" </ColorStop>",
" </ColorLine>",
' <x0 value="0"/>',
' <y0 value="0"/>',
' <x1 value="1"/>',
' <y1 value="1"/>',
' <x2 value="2"/>',
' <y2 value="2"/>',
" <VarIndexBase/>",
"</Paint>",
],
[NO_VARIATION_INDEX, 0],
id="linear_grad-stop[0].alpha",
),
pytest.param(
[
{
"Format": int(ot.PaintFormat.PaintLinearGradient),
"ColorLine": {
"Extend": int(ot.ExtendMode.PAD),
"ColorStop": [
{"StopOffset": 0.0, "PaletteIndex": 0, "Alpha": 1.0},
{"StopOffset": 1.0, "PaletteIndex": 1, "Alpha": 1.0},
],
},
"x0": 0,
"y0": 0,
"x1": 1,
"y1": 1,
"x2": 2,
"y2": 2,
},
{
"Format": int(ot.PaintFormat.PaintLinearGradient),
"ColorLine": {
"Extend": int(ot.ExtendMode.PAD),
"ColorStop": [
{"StopOffset": -0.5, "PaletteIndex": 0, "Alpha": 1.0},
{"StopOffset": 1.0, "PaletteIndex": 1, "Alpha": 1.0},
],
},
"x0": 0,
"y0": 0,
"x1": 1,
"y1": 1,
"x2": 2,
"y2": -200,
},
],
[
'<Paint Format="5"><!-- PaintVarLinearGradient -->',
" <ColorLine>",
' <Extend value="pad"/>',
" <!-- StopCount=2 -->",
' <ColorStop index="0">',
' <StopOffset value="0.0"/>',
' <PaletteIndex value="0"/>',
' <Alpha value="1.0"/>',
' <VarIndexBase value="0"/>',
" </ColorStop>",
' <ColorStop index="1">',
' <StopOffset value="1.0"/>',
' <PaletteIndex value="1"/>',
' <Alpha value="1.0"/>',
" <VarIndexBase/>",
" </ColorStop>",
" </ColorLine>",
' <x0 value="0"/>',
' <y0 value="0"/>',
' <x1 value="1"/>',
' <y1 value="1"/>',
' <x2 value="2"/>',
' <y2 value="2"/>',
' <VarIndexBase value="2"/>',
"</Paint>",
],
[
0,
NO_VARIATION_INDEX,
NO_VARIATION_INDEX,
NO_VARIATION_INDEX,
NO_VARIATION_INDEX,
NO_VARIATION_INDEX,
NO_VARIATION_INDEX,
1,
],
id="linear_grad-stop[0].offset-y2",
),
pytest.param(
[
{
"Format": int(ot.PaintFormat.PaintRadialGradient),
"ColorLine": {
"Extend": int(ot.ExtendMode.PAD),
"ColorStop": [
{"StopOffset": 0.0, "PaletteIndex": 0, "Alpha": 1.0},
{"StopOffset": 1.0, "PaletteIndex": 1, "Alpha": 1.0},
],
},
"x0": 0,
"y0": 0,
"r0": 0,
"x1": 1,
"y1": 1,
"r1": 1,
},
{
"Format": int(ot.PaintFormat.PaintRadialGradient),
"ColorLine": {
"Extend": int(ot.ExtendMode.PAD),
"ColorStop": [
{"StopOffset": 0.1, "PaletteIndex": 0, "Alpha": 0.6},
{"StopOffset": 0.9, "PaletteIndex": 1, "Alpha": 0.7},
],
},
"x0": -1,
"y0": -2,
"r0": 3,
"x1": -4,
"y1": -5,
"r1": 6,
},
],
[
'<Paint Format="7"><!-- PaintVarRadialGradient -->',
" <ColorLine>",
' <Extend value="pad"/>',
" <!-- StopCount=2 -->",
' <ColorStop index="0">',
' <StopOffset value="0.0"/>',
' <PaletteIndex value="0"/>',
' <Alpha value="1.0"/>',
' <VarIndexBase value="0"/>',
" </ColorStop>",
' <ColorStop index="1">',
' <StopOffset value="1.0"/>',
' <PaletteIndex value="1"/>',
' <Alpha value="1.0"/>',
' <VarIndexBase value="2"/>',
" </ColorStop>",
" </ColorLine>",
' <x0 value="0"/>',
' <y0 value="0"/>',
' <r0 value="0"/>',
' <x1 value="1"/>',
' <y1 value="1"/>',
' <r1 value="1"/>',
' <VarIndexBase value="4"/>',
"</Paint>",
],
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
id="radial_grad-all-different",
),
varLib/merger_test: minor reorder sub-tests to follow incremental PaintFormat
2022-06-27 15:38:55 +01:00
pytest.param(
[
{
"Format": int(ot.PaintFormat.PaintSweepGradient),
"ColorLine": {
"Extend": int(ot.ExtendMode.REPEAT),
"ColorStop": [
{"StopOffset": 0.4, "PaletteIndex": 0, "Alpha": 1.0},
{"StopOffset": 0.6, "PaletteIndex": 1, "Alpha": 1.0},
],
},
"centerX": 0,
"centerY": 0,
"startAngle": 0,
"endAngle": 180.0,
},
{
"Format": int(ot.PaintFormat.PaintSweepGradient),
"ColorLine": {
"Extend": int(ot.ExtendMode.REPEAT),
"ColorStop": [
{"StopOffset": 0.4, "PaletteIndex": 0, "Alpha": 1.0},
{"StopOffset": 0.6, "PaletteIndex": 1, "Alpha": 1.0},
],
},
"centerX": 0,
"centerY": 0,
"startAngle": 90.0,
"endAngle": 180.0,
},
],
[
'<Paint Format="9"><!-- PaintVarSweepGradient -->',
" <ColorLine>",
' <Extend value="repeat"/>',
" <!-- StopCount=2 -->",
' <ColorStop index="0">',
' <StopOffset value="0.4"/>',
' <PaletteIndex value="0"/>',
' <Alpha value="1.0"/>',
" <VarIndexBase/>",
" </ColorStop>",
' <ColorStop index="1">',
' <StopOffset value="0.6"/>',
' <PaletteIndex value="1"/>',
' <Alpha value="1.0"/>',
" <VarIndexBase/>",
" </ColorStop>",
" </ColorLine>",
' <centerX value="0"/>',
' <centerY value="0"/>',
' <startAngle value="0.0"/>',
' <endAngle value="180.0"/>',
' <VarIndexBase value="0"/>',
"</Paint>",
],
[NO_VARIATION_INDEX, NO_VARIATION_INDEX, 0, NO_VARIATION_INDEX],
id="sweep_grad-startAngle",
),
COLRVariationMerger: implement reuse of VarIndexBase between tables with same varIdxes When multiple variable tables refer to the same delta-sets they can now share the same VarIndexBase so the resulting DeltaSetIndexMap is a bit smaller. For simplicity, we only reuse VarIndexBase when variable tables fully share (ie. same, and same number of) varIdxes; potentially we could reuse subsets of varIdxes (e.g. a VarColoStop.Alpha has a +0.5 delta, and later on elsewhere a PaintVarSolid.Alpha has a similar +0.5 delta; the latter could have a VarIndexBase that reuses an existing DeltaSetIndexMap entry for the former), but for now this I think is good enough.
2022-06-27 17:17:05 +01:00
pytest.param(
[
{
"Format": int(ot.PaintFormat.PaintSweepGradient),
"ColorLine": {
"Extend": int(ot.ExtendMode.PAD),
"ColorStop": [
{"StopOffset": 0.0, "PaletteIndex": 0, "Alpha": 1.0},
{"StopOffset": 1.0, "PaletteIndex": 1, "Alpha": 1.0},
],
},
"centerX": 0,
"centerY": 0,
"startAngle": 0.0,
"endAngle": 180.0,
},
{
"Format": int(ot.PaintFormat.PaintSweepGradient),
"ColorLine": {
"Extend": int(ot.ExtendMode.PAD),
"ColorStop": [
{"StopOffset": 0.0, "PaletteIndex": 0, "Alpha": 0.5},
{"StopOffset": 1.0, "PaletteIndex": 1, "Alpha": 0.5},
],
},
"centerX": 0,
"centerY": 0,
"startAngle": 0.0,
"endAngle": 180.0,
},
],
[
'<Paint Format="9"><!-- PaintVarSweepGradient -->',
" <ColorLine>",
' <Extend value="pad"/>',
" <!-- StopCount=2 -->",
' <ColorStop index="0">',
' <StopOffset value="0.0"/>',
' <PaletteIndex value="0"/>',
' <Alpha value="1.0"/>',
' <VarIndexBase value="0"/>',
" </ColorStop>",
' <ColorStop index="1">',
' <StopOffset value="1.0"/>',
' <PaletteIndex value="1"/>',
' <Alpha value="1.0"/>',
' <VarIndexBase value="0"/>',
" </ColorStop>",
" </ColorLine>",
' <centerX value="0"/>',
' <centerY value="0"/>',
' <startAngle value="0.0"/>',
' <endAngle value="180.0"/>',
' <VarIndexBase/>',
"</Paint>",
],
[NO_VARIATION_INDEX, 0],
id="sweep_grad-stops-alpha-reuse-varidxbase",
),
Start adding Tests/varLib/merger_test.py for COLRVariationMerger
2022-06-24 18:16:28 +01:00
pytest.param(
[
{
"Format": int(ot.PaintFormat.PaintTransform),
"Paint": {
"Format": int(ot.PaintFormat.PaintRadialGradient),
"ColorLine": {
"Extend": int(ot.ExtendMode.PAD),
"ColorStop": [
{
"StopOffset": 0.0,
"PaletteIndex": 0,
"Alpha": 1.0,
},
{
"StopOffset": 1.0,
"PaletteIndex": 1,
"Alpha": 1.0,
},
],
},
"x0": 0,
"y0": 0,
"r0": 0,
"x1": 1,
"y1": 1,
"r1": 1,
},
"Transform": {
"xx": 1.0,
"xy": 0.0,
"yx": 0.0,
"yy": 1.0,
"dx": 0.0,
"dy": 0.0,
},
},
{
"Format": int(ot.PaintFormat.PaintTransform),
"Paint": {
"Format": int(ot.PaintFormat.PaintRadialGradient),
"ColorLine": {
"Extend": int(ot.ExtendMode.PAD),
"ColorStop": [
{
"StopOffset": 0.0,
"PaletteIndex": 0,
"Alpha": 1.0,
},
{
"StopOffset": 1.0,
"PaletteIndex": 1,
"Alpha": 1.0,
},
],
},
"x0": 0,
"y0": 0,
"r0": 0,
"x1": 1,
"y1": 1,
"r1": 1,
},
"Transform": {
"xx": 1.0,
"xy": 0.0,
"yx": 0.0,
"yy": 0.5,
"dx": 0.0,
"dy": -100.0,
},
},
],
[
'<Paint Format="13"><!-- PaintVarTransform -->',
' <Paint Format="6"><!-- PaintRadialGradient -->',
" <ColorLine>",
' <Extend value="pad"/>',
" <!-- StopCount=2 -->",
' <ColorStop index="0">',
' <StopOffset value="0.0"/>',
' <PaletteIndex value="0"/>',
' <Alpha value="1.0"/>',
" </ColorStop>",
' <ColorStop index="1">',
' <StopOffset value="1.0"/>',
' <PaletteIndex value="1"/>',
' <Alpha value="1.0"/>',
" </ColorStop>",
" </ColorLine>",
' <x0 value="0"/>',
' <y0 value="0"/>',
' <r0 value="0"/>',
' <x1 value="1"/>',
' <y1 value="1"/>',
' <r1 value="1"/>',
" </Paint>",
" <Transform>",
' <xx value="1.0"/>',
' <yx value="0.0"/>',
' <xy value="0.0"/>',
' <yy value="1.0"/>',
' <dx value="0.0"/>',
' <dy value="0.0"/>',
' <VarIndexBase value="0"/>',
" </Transform>",
"</Paint>",
],
[
NO_VARIATION_INDEX,
NO_VARIATION_INDEX,
NO_VARIATION_INDEX,
0,
NO_VARIATION_INDEX,
1,
],
id="transform-yy-dy",
),
],
)
def test_merge_Paint(self, paints, ttFont, expected_xml, expected_varIdxes):
paints = [build_paint(p) for p in paints]
out = deepcopy(paints[0])
model = VariationModel([{}, {"ZZZZ": 1.0}])
merger = COLRVariationMerger(model, ["ZZZZ"], ttFont)
merger.mergeThings(out, paints)
assert compile_decompile(out, ttFont) == out
assert dump_xml(out, ttFont) == expected_xml
assert merger.varIdxes == expected_varIdxes
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