blob: 1d54a103f10dbe1ba617f4d159ee8a26f7b8aedc [file] [log] [blame]
* Copyright 2014 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef GrCoverageSetOpXP_DEFINED
#define GrCoverageSetOpXP_DEFINED
#include "include/core/SkRegion.h"
#include "include/gpu/GrTypes.h"
#include "src/gpu/GrXferProcessor.h"
// See the comment above GrXPFactory's definition about this warning suppression.
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wnon-virtual-dtor"
* This xfer processor directly blends the the src coverage with the dst using a set operator. It is
* useful for rendering coverage masks using CSG. It can optionally invert the src coverage before
* applying the set operator.
class GrCoverageSetOpXPFactory : public GrXPFactory {
static const GrXPFactory* Get(SkRegion::Op regionOp, bool invertCoverage = false);
constexpr GrCoverageSetOpXPFactory(SkRegion::Op regionOp, bool invertCoverage);
sk_sp<const GrXferProcessor> makeXferProcessor(const GrProcessorAnalysisColor&,
const GrCaps&,
GrClampType) const override;
AnalysisProperties analysisProperties(const GrProcessorAnalysisColor& color,
const GrProcessorAnalysisCoverage& coverage,
const GrCaps&,
GrClampType) const override {
auto props = AnalysisProperties::kIgnoresInputColor;
switch (fRegionOp) {
case SkRegion::kReplace_Op:
props |= AnalysisProperties::kUnaffectedByDstValue;
case SkRegion::kUnion_Op:
case SkRegion::kDifference_Op:
// FIXME: If we can formalize the fact that this op only operates on alpha, we can
// set AnalysisProperties::kUnaffectedByDstValue if color/coverage are all opaque.
case SkRegion::kIntersect_Op:
case SkRegion::kXOR_Op:
case SkRegion::kReverseDifference_Op:
return props;
SkRegion::Op fRegionOp;
bool fInvertCoverage;
using INHERITED = GrXPFactory;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#if defined(__clang__)
#pragma clang diagnostic pop