chromium/third_party/skia/src/gpu/ganesh/effects/GrDistanceFieldGeoProc.h

/*
 * Copyright 2013 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef GrDistanceFieldGeoProc_DEFINED
#define GrDistanceFieldGeoProc_DEFINED

#if !defined(SK_DISABLE_SDF_TEXT)

#include "include/core/SkMatrix.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "src/base/SkArenaAlloc.h"
#include "src/gpu/ganesh/GrGeometryProcessor.h"
#include "src/gpu/ganesh/GrProcessorUnitTest.h"
#include "src/gpu/ganesh/GrSamplerState.h"

#include <cstdint>
#include <memory>

class GrSurfaceProxyView;
namespace skgpu { class KeyBuilder; }
struct GrShaderCaps;

enum GrDistanceFieldEffectFlags { … };

/**
 * The output color of this effect is a modulation of the input color and a sample from a
 * distance field texture (using a smoothed step function near 0.5).
 * It allows explicit specification of the filtering and wrap modes (GrSamplerState). The input
 * coords are a custom attribute. Gamma correction is handled via a texture LUT.
 */
class GrDistanceFieldA8TextGeoProc : public GrGeometryProcessor { … };

/**
 * The output color of this effect is a modulation of the input color and a sample from a
 * distance field texture (using a smoothed step function near 0.5).
 * It allows explicit specification of the filtering and wrap modes (GrSamplerState). The input
 * coords are a custom attribute. No gamma correct blending is applied. Used for paths only.
 */
class GrDistanceFieldPathGeoProc : public GrGeometryProcessor { … };

/**
 * The output color of this effect is a modulation of the input color and samples from a
 * distance field texture (using a smoothed step function near 0.5), adjusted for LCD displays.
 * It allows explicit specification of the filtering and wrap modes (GrSamplerState). The input
 * coords are a custom attribute. Gamma correction is handled via a texture LUT.
 */
class GrDistanceFieldLCDTextGeoProc : public GrGeometryProcessor { … };

#endif // !defined(SK_DISABLE_SDF_TEXT)

#endif