[cff] Optimize the blend vector computations.
* src/cff/cffload.c (cff_blend_build_vector): Use FT_MulDiv and skip multiplying by 1.
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@ -1495,44 +1495,41 @@
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for ( j = 0; j < lenNDV; j++ )
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for ( j = 0; j < lenNDV; j++ )
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{
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{
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CFF_AxisCoords* axis = &varRegion->axisList[j];
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CFF_AxisCoords* axis = &varRegion->axisList[j];
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FT_Fixed axisScalar;
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/* compute the scalar contribution of this axis; */
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/* compute the scalar contribution of this axis; */
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/* ignore invalid ranges */
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/* ignore invalid ranges */
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if ( axis->startCoord > axis->peakCoord ||
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if ( axis->startCoord > axis->peakCoord ||
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axis->peakCoord > axis->endCoord )
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axis->peakCoord > axis->endCoord )
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axisScalar = FT_FIXED_ONE;
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continue;
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else if ( axis->startCoord < 0 &&
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else if ( axis->startCoord < 0 &&
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axis->endCoord > 0 &&
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axis->endCoord > 0 &&
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axis->peakCoord != 0 )
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axis->peakCoord != 0 )
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axisScalar = FT_FIXED_ONE;
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continue;
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/* peak of 0 means ignore this axis */
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/* peak of 0 means ignore this axis */
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else if ( axis->peakCoord == 0 )
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else if ( axis->peakCoord == 0 )
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axisScalar = FT_FIXED_ONE;
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continue;
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/* ignore this region if coords are out of range */
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/* ignore this region if coords are out of range */
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else if ( NDV[j] < axis->startCoord ||
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else if ( NDV[j] < axis->startCoord ||
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NDV[j] > axis->endCoord )
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NDV[j] > axis->endCoord )
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axisScalar = 0;
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/* calculate a proportional factor */
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else
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{
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{
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if ( NDV[j] == axis->peakCoord )
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blend->BV[master] = 0;
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axisScalar = FT_FIXED_ONE;
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break;
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else if ( NDV[j] < axis->peakCoord )
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axisScalar = FT_DivFix( NDV[j] - axis->startCoord,
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axis->peakCoord - axis->startCoord );
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else
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axisScalar = FT_DivFix( axis->endCoord - NDV[j],
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axis->endCoord - axis->peakCoord );
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}
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}
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/* take product of all the axis scalars */
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/* adjust proportionally */
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blend->BV[master] = FT_MulFix( blend->BV[master], axisScalar );
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else if ( NDV[j] < axis->peakCoord )
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blend->BV[master] = FT_MulDiv( blend->BV[master],
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NDV[j] - axis->startCoord,
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axis->peakCoord - axis->startCoord );
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else if ( NDV[j] > axis->peakCoord )
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blend->BV[master] = FT_MulDiv( blend->BV[master],
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axis->endCoord - NDV[j],
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axis->endCoord - axis->peakCoord );
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}
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}
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FT_TRACE4(( ", %f ",
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FT_TRACE4(( ", %f ",
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