[Git][freetype/freetype][master] [cff] Optimize the blend vector computations.

[Alexei Podtelezhnikov (@apodtele)]

Alexei Podtelezhnikov pushed to branch master at FreeType / FreeType

Commits:

• 4ccdc9f9
  by Alexei Podtelezhnikov (Алексей Подтележников) at 2024-05-20T18:53:57-04:00

  [cff] Optimize the blend vector computations.
  
  * src/cff/cffload.c (cff_blend_build_vector): Use FT_MulDiv and skip
  multiplying by 1.
  

1 changed file:

• src/cff/cffload.c

Changes:

src/cff/cffload.c

---

...	...	@@ -1495,44 +1495,41 @@
1495	1495	for ( j = 0; j < lenNDV; j++ )
1496	1496	{
1497	1497	CFF_AxisCoords* axis = &varRegion->axisList[j];
1498		- FT_Fixed axisScalar;
1499	1498
1500	1499
1501	1500	/* compute the scalar contribution of this axis; */
1502	1501	/* ignore invalid ranges */
1503	1502	if ( axis->startCoord > axis->peakCoord ||
1504	1503	axis->peakCoord > axis->endCoord )
1505		- axisScalar = FT_FIXED_ONE;
	1504	+ continue;
1506	1505
1507	1506	else if ( axis->startCoord < 0 &&
1508	1507	axis->endCoord > 0 &&
1509	1508	axis->peakCoord != 0 )
1510		- axisScalar = FT_FIXED_ONE;
	1509	+ continue;
1511	1510
1512	1511	/* peak of 0 means ignore this axis */
1513	1512	else if ( axis->peakCoord == 0 )
1514		- axisScalar = FT_FIXED_ONE;
	1513	+ continue;
1515	1514
1516	1515	/* ignore this region if coords are out of range */
1517	1516	else if ( NDV[j] < axis->startCoord ||
1518	1517	NDV[j] > axis->endCoord )
1519		- axisScalar = 0;
1520		-
1521		- /* calculate a proportional factor */
1522		- else
1523	1518	{
1524		- if ( NDV[j] == axis->peakCoord )
1525		- axisScalar = FT_FIXED_ONE;
1526		- else if ( NDV[j] < axis->peakCoord )
1527		- axisScalar = FT_DivFix( NDV[j] - axis->startCoord,
1528		- axis->peakCoord - axis->startCoord );
1529		- else
1530		- axisScalar = FT_DivFix( axis->endCoord - NDV[j],
1531		- axis->endCoord - axis->peakCoord );
	1519	+ blend->BV[master] = 0;
	1520	+ break;
1532	1521	}
1533	1522
1534		- /* take product of all the axis scalars */
1535		- blend->BV[master] = FT_MulFix( blend->BV[master], axisScalar );
	1523	+ /* adjust proportionally */
	1524	+ else if ( NDV[j] < axis->peakCoord )
	1525	+ blend->BV[master] = FT_MulDiv( blend->BV[master],
	1526	+ NDV[j] - axis->startCoord,
	1527	+ axis->peakCoord - axis->startCoord );
	1528	+
	1529	+ else if ( NDV[j] > axis->peakCoord )
	1530	+ blend->BV[master] = FT_MulDiv( blend->BV[master],
	1531	+ axis->endCoord - NDV[j],
	1532	+ axis->endCoord - axis->peakCoord );
1536	1533	}
1537	1534
1538	1535	FT_TRACE4(( ", %f ",

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