fc497343cb
Allow users to query a typeface's position in variation design space. Change-Id: Id7cae439e795b8c9586394f11359fb7fe55e1c0b Reviewed-on: https://skia-review.googlesource.com/8861 Reviewed-by: Mike Reed <reed@google.com> Commit-Queue: Ben Wagner <bungeman@google.com>
80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkFontAgruments_DEFINED
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#define SkFontAgruments_DEFINED
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#include "SkScalar.h"
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#include "SkTypes.h"
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/** Represents a set of actual arguments for a font. */
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struct SkFontArguments {
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struct VariationPosition {
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struct Coordinate {
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SkFourByteTag axis;
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SkScalar value;
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};
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const Coordinate* coordinates;
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int coordinateCount;
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};
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// deprecated, use VariationCoordinate instead
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struct Axis {
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SkFourByteTag fTag;
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SkScalar fStyleValue;
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};
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SkFontArguments() : fCollectionIndex(0), fVariationDesignPosition{nullptr, 0} {}
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/** Specify the index of the desired font.
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*
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* Font formats like ttc, dfont, cff, cid, pfr, t42, t1, and fon may actually be indexed
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* collections of fonts.
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*/
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SkFontArguments& setCollectionIndex(int collectionIndex) {
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fCollectionIndex = collectionIndex;
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return *this;
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}
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// deprecated, use setVariationDesignPosition instead.
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SkFontArguments& setAxes(const Axis* axes, int axisCount) {
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fVariationDesignPosition.coordinates =
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reinterpret_cast<const VariationPosition::Coordinate*>(axes);
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fVariationDesignPosition.coordinateCount = axisCount;
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return *this;
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}
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/** Specify a position in the variation design space.
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*
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* Any axis not specified will use the default value.
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* Any specified axis not actually present in the font will be ignored.
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*
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* @param position not copied. The value must remain valid for life of SkFontArguments.
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*/
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SkFontArguments& setVariationDesignPosition(VariationPosition position) {
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fVariationDesignPosition.coordinates = position.coordinates;
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fVariationDesignPosition.coordinateCount = position.coordinateCount;
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return *this;
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}
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int getCollectionIndex() const {
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return fCollectionIndex;
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}
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// deprecated, use getVariationDesignPosition instead.
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const Axis* getAxes(int* axisCount) const {
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*axisCount = fVariationDesignPosition.coordinateCount;
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return reinterpret_cast<const Axis*>(fVariationDesignPosition.coordinates);
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}
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VariationPosition getVariationDesignPosition() const {
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return fVariationDesignPosition;
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}
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private:
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int fCollectionIndex;
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VariationPosition fVariationDesignPosition;
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};
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#endif
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