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/*
* 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 GrDistanceFieldTextureEffect_DEFINED
#define GrDistanceFieldTextureEffect_DEFINED
#include "GrProcessor.h"
#include "GrGeometryProcessor.h"
class GrGLDistanceFieldTextureEffect;
class GrGLDistanceFieldNoGammaTextureEffect;
class GrGLDistanceFieldLCDTextureEffect;
class GrInvariantOutput;
enum GrDistanceFieldEffectFlags {
kSimilarity_DistanceFieldEffectFlag = 0x01, // ctm is similarity matrix
kRectToRect_DistanceFieldEffectFlag = 0x02, // ctm maps rects to rects
kUseLCD_DistanceFieldEffectFlag = 0x04, // use lcd text
kBGR_DistanceFieldEffectFlag = 0x08, // lcd display has bgr order
kPortrait_DistanceFieldEffectFlag = 0x10, // lcd display is in portrait mode (not used yet)
kColorAttr_DistanceFieldEffectFlag = 0x20, // color vertex attribute
kInvalid_DistanceFieldEffectFlag = 0x80, // invalid state (for initialization)
kUniformScale_DistanceFieldEffectMask = kSimilarity_DistanceFieldEffectFlag |
kRectToRect_DistanceFieldEffectFlag,
// The subset of the flags relevant to GrDistanceFieldTextureEffect
kNonLCD_DistanceFieldEffectMask = kSimilarity_DistanceFieldEffectFlag |
kColorAttr_DistanceFieldEffectFlag,
// The subset of the flags relevant to GrDistanceFieldLCDTextureEffect
kLCD_DistanceFieldEffectMask = kSimilarity_DistanceFieldEffectFlag |
kRectToRect_DistanceFieldEffectFlag |
kUseLCD_DistanceFieldEffectFlag |
kBGR_DistanceFieldEffectFlag,
};
/**
* 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 (GrTextureParams). The input
* coords are a custom attribute. Gamma correction is handled via a texture LUT.
*/
class GrDistanceFieldTextureEffect : public GrGeometryProcessor {
public:
#ifdef SK_GAMMA_APPLY_TO_A8
static GrGeometryProcessor* Create(GrColor color, const SkMatrix& viewMatrix, GrTexture* tex,
const GrTextureParams& params,
GrTexture* gamma, const GrTextureParams& gammaParams,
float lum, uint32_t flags, bool opaqueVertexColors) {
return SkNEW_ARGS(GrDistanceFieldTextureEffect, (color, viewMatrix, tex, params, gamma,
gammaParams, lum,
flags, opaqueVertexColors));
}
#else
static GrGeometryProcessor* Create(GrColor color, const SkMatrix& viewMatrix, GrTexture* tex,
const GrTextureParams& params,
uint32_t flags, bool opaqueVertexColors) {
return SkNEW_ARGS(GrDistanceFieldTextureEffect, (color, viewMatrix, tex, params, flags,
opaqueVertexColors));
}
#endif
virtual ~GrDistanceFieldTextureEffect() {}
const char* name() const override { return "DistanceFieldTexture"; }
const Attribute* inPosition() const { return fInPosition; }
const Attribute* inColor() const { return fInColor; }
const Attribute* inTextureCoords() const { return fInTextureCoords; }
#ifdef SK_GAMMA_APPLY_TO_A8
float getLuminance() const { return fLuminance; }
#endif
uint32_t getFlags() const { return fFlags; }
virtual void getGLProcessorKey(const GrBatchTracker& bt,
const GrGLCaps& caps,
GrProcessorKeyBuilder* b) const override;
virtual GrGLPrimitiveProcessor* createGLInstance(const GrBatchTracker& bt,
const GrGLCaps&) const override;
void initBatchTracker(GrBatchTracker* bt, const GrPipelineInfo& init) const override;
bool onCanMakeEqual(const GrBatchTracker&,
const GrGeometryProcessor&,
const GrBatchTracker&) const override;
private:
GrDistanceFieldTextureEffect(GrColor, const SkMatrix& viewMatrix, GrTexture* texture,
const GrTextureParams& params,
#ifdef SK_GAMMA_APPLY_TO_A8
GrTexture* gamma, const GrTextureParams& gammaParams, float lum,
#endif
uint32_t flags, bool opaqueVertexColors);
bool onIsEqual(const GrGeometryProcessor& other) const override;
void onGetInvariantOutputCoverage(GrInitInvariantOutput*) const override;
GrTextureAccess fTextureAccess;
#ifdef SK_GAMMA_APPLY_TO_A8
GrTextureAccess fGammaTextureAccess;
float fLuminance;
#endif
uint32_t fFlags;
const Attribute* fInPosition;
const Attribute* fInColor;
const Attribute* fInTextureCoords;
GR_DECLARE_GEOMETRY_PROCESSOR_TEST;
typedef GrGeometryProcessor INHERITED;
};
/**
* 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 (GrTextureParams). The input
* coords are a custom attribute. No gamma correct blending is applied.
*/
class GrDistanceFieldNoGammaTextureEffect : public GrGeometryProcessor {
public:
static GrGeometryProcessor* Create(GrColor color, const SkMatrix& viewMatrix, GrTexture* tex,
const GrTextureParams& params,
uint32_t flags, bool opaqueVertexColors) {
return SkNEW_ARGS(GrDistanceFieldNoGammaTextureEffect, (color, viewMatrix, tex, params,
flags, opaqueVertexColors));
}
virtual ~GrDistanceFieldNoGammaTextureEffect() {}
const char* name() const override { return "DistanceFieldTexture"; }
const Attribute* inPosition() const { return fInPosition; }
const Attribute* inColor() const { return fInColor; }
const Attribute* inTextureCoords() const { return fInTextureCoords; }
uint32_t getFlags() const { return fFlags; }
virtual void getGLProcessorKey(const GrBatchTracker& bt,
const GrGLCaps& caps,
GrProcessorKeyBuilder* b) const override;
virtual GrGLPrimitiveProcessor* createGLInstance(const GrBatchTracker& bt,
const GrGLCaps&) const override;
void initBatchTracker(GrBatchTracker* bt, const GrPipelineInfo& init) const override;
bool onCanMakeEqual(const GrBatchTracker&,
const GrGeometryProcessor&,
const GrBatchTracker&) const override;
private:
GrDistanceFieldNoGammaTextureEffect(GrColor, const SkMatrix& viewMatrix, GrTexture* texture,
const GrTextureParams& params, uint32_t flags,
bool opaqueVertexColors);
bool onIsEqual(const GrGeometryProcessor& other) const override;
void onGetInvariantOutputCoverage(GrInitInvariantOutput*) const override;
GrTextureAccess fTextureAccess;
uint32_t fFlags;
const Attribute* fInPosition;
const Attribute* fInColor;
const Attribute* fInTextureCoords;
GR_DECLARE_GEOMETRY_PROCESSOR_TEST;
typedef GrGeometryProcessor INHERITED;
};
/**
* 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 (GrTextureParams). The input
* coords are a custom attribute. Gamma correction is handled via a texture LUT.
*/
class GrDistanceFieldLCDTextureEffect : public GrGeometryProcessor {
public:
static GrGeometryProcessor* Create(GrColor color, const SkMatrix& viewMatrix, GrTexture* tex,
const GrTextureParams& params, GrTexture* gamma,
const GrTextureParams& gammaParams,
SkColor textColor, uint32_t flags) {
return SkNEW_ARGS(GrDistanceFieldLCDTextureEffect,
(color, viewMatrix, tex, params, gamma, gammaParams, textColor, flags));
}
virtual ~GrDistanceFieldLCDTextureEffect() {}
const char* name() const override { return "DistanceFieldLCDTexture"; }
const Attribute* inPosition() const { return fInPosition; }
const Attribute* inTextureCoords() const { return fInTextureCoords; }
GrColor getTextColor() const { return fTextColor; }
uint32_t getFlags() const { return fFlags; }
virtual void getGLProcessorKey(const GrBatchTracker& bt,
const GrGLCaps& caps,
GrProcessorKeyBuilder* b) const override;
virtual GrGLPrimitiveProcessor* createGLInstance(const GrBatchTracker& bt,
const GrGLCaps&) const override;
void initBatchTracker(GrBatchTracker* bt, const GrPipelineInfo& init) const override;
bool onCanMakeEqual(const GrBatchTracker&,
const GrGeometryProcessor&,
const GrBatchTracker&) const override;
private:
GrDistanceFieldLCDTextureEffect(GrColor, const SkMatrix& viewMatrix, GrTexture* texture,
const GrTextureParams& params,
GrTexture* gamma, const GrTextureParams& gammaParams,
SkColor textColor, uint32_t flags);
bool onIsEqual(const GrGeometryProcessor& other) const override;
void onGetInvariantOutputCoverage(GrInitInvariantOutput*) const override;
GrTextureAccess fTextureAccess;
GrTextureAccess fGammaTextureAccess;
GrColor fTextColor;
uint32_t fFlags;
const Attribute* fInPosition;
const Attribute* fInTextureCoords;
GR_DECLARE_GEOMETRY_PROCESSOR_TEST;
typedef GrGeometryProcessor INHERITED;
};
#endif
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