skia2/modules/svg/include/SkSVGAttributeParser.h
Tyler Denniston 70bb18d7c9 [svg] Implement feColorMatrix filter
Supporting this filter will also allow us to start implementing and
testing the filter result DAG via the filters-color-01-b test. That test
is one of the simplest that involves filter result storage, so it's a
good candidate to start with.

Bug: skia:10841
Change-Id: Id8317ccfb78031cc6af83c9f3e3f382dcb6dee98
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/332599
Commit-Queue: Tyler Denniston <tdenniston@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
2020-11-06 18:40:24 +00:00

126 lines
3.9 KiB
C++

/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkSVGAttributeParser_DEFINED
#define SkSVGAttributeParser_DEFINED
#include "include/private/SkNoncopyable.h"
#include "modules/svg/include/SkSVGTypes.h"
#include "src/core/SkTLazy.h"
class SkSVGAttributeParser : public SkNoncopyable {
public:
SkSVGAttributeParser(const char[]);
bool parseColor(SkSVGColorType*);
bool parseClipPath(SkSVGClip*);
bool parseFillRule(SkSVGFillRule*);
bool parseFilter(SkSVGFilterType*);
bool parseNumber(SkSVGNumberType*);
bool parseInteger(SkSVGIntegerType*);
bool parseLength(SkSVGLength*);
bool parseViewBox(SkSVGViewBoxType*);
bool parseTransform(SkSVGTransformType*);
bool parsePaint(SkSVGPaint*);
bool parseLineCap(SkSVGLineCap*);
bool parseLineJoin(SkSVGLineJoin*);
bool parsePoints(SkSVGPointsType*);
bool parseIRI(SkSVGStringType*);
bool parseSpreadMethod(SkSVGSpreadMethod*);
bool parseStopColor(SkSVGStopColor*);
bool parseObjectBoundingBoxUnits(SkSVGObjectBoundingBoxUnits*);
bool parseVisibility(SkSVGVisibility*);
bool parseDashArray(SkSVGDashArray*);
bool parsePreserveAspectRatio(SkSVGPreserveAspectRatio*);
bool parseFontFamily(SkSVGFontFamily*);
bool parseFontSize(SkSVGFontSize*);
bool parseFontStyle(SkSVGFontStyle*);
bool parseFontWeight(SkSVGFontWeight*);
bool parseTextAnchor(SkSVGTextAnchor*);
// TODO: Migrate all parse*() functions to this style (and delete the old version)
// so they can be used by parse<T>():
bool parse(SkSVGNumberType* v) { return parseNumber(v); }
bool parse(SkSVGIntegerType* v) { return parseInteger(v); }
template <typename T> using ParseResult = SkTLazy<T>;
template <typename T>
static ParseResult<T> parse(const char* expectedName,
const char* name,
const char* value) {
ParseResult<T> result;
if (!strcmp(name, expectedName)) {
T parsedValue;
if (SkSVGAttributeParser(value).parse(&parsedValue)) {
result.set(std::move(parsedValue));
}
}
return result;
}
private:
// Stack-only
void* operator new(size_t) = delete;
void* operator new(size_t, void*) = delete;
template <typename T>
bool parse(T*);
template <typename F>
bool advanceWhile(F func);
bool parseWSToken();
bool parseEOSToken();
bool parseSepToken();
bool parseCommaWspToken();
bool parseExpectedStringToken(const char*);
bool parseScalarToken(SkScalar*);
bool parseInt32Token(int32_t*);
bool parseHexToken(uint32_t*);
bool parseLengthUnitToken(SkSVGLength::Unit*);
bool parseNamedColorToken(SkColor*);
bool parseHexColorToken(SkColor*);
bool parseColorComponentToken(int32_t*);
bool parseRGBColorToken(SkColor*);
bool parseFuncIRI(SkSVGStringType*);
// Transform helpers
bool parseMatrixToken(SkMatrix*);
bool parseTranslateToken(SkMatrix*);
bool parseScaleToken(SkMatrix*);
bool parseRotateToken(SkMatrix*);
bool parseSkewXToken(SkMatrix*);
bool parseSkewYToken(SkMatrix*);
// Parses a sequence of 'WS* <prefix> WS* (<nested>)', where the nested sequence
// is handled by the passed functor.
template <typename Func, typename T>
bool parseParenthesized(const char* prefix, Func, T* result);
template <typename T, typename TArray>
bool parseEnumMap(const TArray& arr, T* result) {
for (size_t i = 0; i < SK_ARRAY_COUNT(arr); ++i) {
if (this->parseExpectedStringToken(std::get<0>(arr[i]))) {
*result = std::get<1>(arr[i]);
return true;
}
}
return false;
}
// The current position in the input string.
const char* fCurPos;
using INHERITED = SkNoncopyable;
};
#endif // SkSVGAttributeParser_DEFINED