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* Copyright 2017 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef SkFontArguments_DEFINED
#define SkFontArguments_DEFINED
#include "include/core/SkColor.h"
#include "include/core/SkScalar.h"
#include "include/core/SkTypes.h"
/** Represents a set of actual arguments for a font. */
struct SkFontArguments {
struct VariationPosition {
struct Coordinate {
SkFourByteTag axis;
float value;
const Coordinate* coordinates;
int coordinateCount;
/** Specify a palette to use and overrides for palette entries.
* `overrides` is a list of pairs of palette entry index and color.
* The overriden palette entries will use the associated color.
* Override pairs with palette entry indices out of range will not be applied.
* Later override entries override earlier ones.
struct Palette {
struct Override {
uint16_t index;
SkColor color;
int index;
const Override* overrides;
int overrideCount;
: fCollectionIndex(0)
, fVariationDesignPosition{nullptr, 0}
, fPalette{0, nullptr, 0} {}
/** Specify the index of the desired font.
* Font formats like ttc, dfont, cff, cid, pfr, t42, t1, and fon may actually be indexed
* collections of fonts.
SkFontArguments& setCollectionIndex(int collectionIndex) {
fCollectionIndex = collectionIndex;
return *this;
/** Specify a position in the variation design space.
* Any axis not specified will use the default value.
* Any specified axis not actually present in the font will be ignored.
* @param position not copied. The value must remain valid for life of SkFontArguments.
SkFontArguments& setVariationDesignPosition(VariationPosition position) {
fVariationDesignPosition.coordinates = position.coordinates;
fVariationDesignPosition.coordinateCount = position.coordinateCount;
return *this;
int getCollectionIndex() const {
return fCollectionIndex;
VariationPosition getVariationDesignPosition() const {
return fVariationDesignPosition;
SkFontArguments& setPalette(Palette palette) {
fPalette.index = palette.index;
fPalette.overrides = palette.overrides;
fPalette.overrideCount = palette.overrideCount;
return *this;
Palette getPalette() const { return fPalette; }
int fCollectionIndex;
VariationPosition fVariationDesignPosition;
Palette fPalette;