blob: e374815f40de911db3565887130bdce666978f3f [file] [log] [blame]
* Copyright 2011 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef SkEmptyShader_DEFINED
#define SkEmptyShader_DEFINED
#include "src/shaders/SkShaderBase.h"
// TODO: move this to private, as there is a public factory on SkShader
* \class SkEmptyShader
* A Shader that always draws nothing. Its createContext always returns nullptr.
class SkEmptyShader : public SkShaderBase {
SkEmptyShader() {}
Context* onMakeContext(const ContextRec&, SkArenaAlloc*) const override {
return nullptr;
void flatten(SkWriteBuffer& buffer) const override {
// Do nothing.
// We just don't want to fall through to SkShader::flatten(),
// which will write data we don't care to serialize or decode.
bool onAppendStages(const SkStageRec&) const override {
return false;
skvm::Color onProgram(skvm::Builder*, skvm::Coord, skvm::Coord, skvm::Color,
const SkMatrixProvider&, const SkMatrix*,
SkFilterQuality, const SkColorInfo&,
skvm::Uniforms*, SkArenaAlloc*) const override;
using INHERITED = SkShaderBase;