| /* |
| * 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 GrGLDistanceFieldLCDTextureEffect; |
| |
| 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) |
| |
| kUniformScale_DistanceFieldEffectMask = kSimilarity_DistanceFieldEffectFlag | |
| kRectToRect_DistanceFieldEffectFlag, |
| // The subset of the flags relevant to GrDistanceFieldTextureEffect |
| kNonLCD_DistanceFieldEffectMask = kSimilarity_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(GrTexture* tex, const GrTextureParams& params, |
| GrTexture* gamma, const GrTextureParams& gammaParams, |
| float lum, uint32_t flags) { |
| return SkNEW_ARGS(GrDistanceFieldTextureEffect, (tex, params, gamma, gammaParams, lum, |
| flags)); |
| } |
| #else |
| static GrGeometryProcessor* Create(GrTexture* tex, const GrTextureParams& params, |
| uint32_t flags) { |
| return SkNEW_ARGS(GrDistanceFieldTextureEffect, (tex, params, flags)); |
| } |
| #endif |
| |
| virtual ~GrDistanceFieldTextureEffect() {} |
| |
| static const char* Name() { return "DistanceFieldTexture"; } |
| |
| virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE; |
| |
| const GrShaderVar& inTextureCoords() const { return fInTextureCoords; } |
| #ifdef SK_GAMMA_APPLY_TO_A8 |
| float getLuminance() const { return fLuminance; } |
| #endif |
| uint32_t getFlags() const { return fFlags; } |
| |
| typedef GrGLDistanceFieldTextureEffect GLProcessor; |
| |
| virtual const GrBackendGeometryProcessorFactory& getFactory() const SK_OVERRIDE; |
| |
| private: |
| GrDistanceFieldTextureEffect(GrTexture* texture, const GrTextureParams& params, |
| #ifdef SK_GAMMA_APPLY_TO_A8 |
| GrTexture* gamma, const GrTextureParams& gammaParams, float lum, |
| #endif |
| uint32_t flags); |
| |
| virtual bool onIsEqual(const GrProcessor& other) const SK_OVERRIDE; |
| |
| GrTextureAccess fTextureAccess; |
| #ifdef SK_GAMMA_APPLY_TO_A8 |
| GrTextureAccess fGammaTextureAccess; |
| float fLuminance; |
| #endif |
| uint32_t fFlags; |
| const GrShaderVar& fInTextureCoords; |
| |
| GR_DECLARE_GEOMETRY_PROCESSOR_TEST; |
| |
| typedef GrFragmentProcessor 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(GrTexture* tex, const GrTextureParams& params, |
| GrTexture* gamma, const GrTextureParams& gammaParams, |
| SkColor textColor, uint32_t flags) { |
| return SkNEW_ARGS(GrDistanceFieldLCDTextureEffect, |
| (tex, params, gamma, gammaParams, textColor, flags)); |
| } |
| |
| virtual ~GrDistanceFieldLCDTextureEffect() {} |
| |
| static const char* Name() { return "DistanceFieldLCDTexture"; } |
| |
| const GrShaderVar& inTextureCoords() const { return fInTextureCoords; } |
| virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE; |
| GrColor getTextColor() const { return fTextColor; } |
| uint32_t getFlags() const { return fFlags; } |
| |
| typedef GrGLDistanceFieldLCDTextureEffect GLProcessor; |
| |
| virtual const GrBackendGeometryProcessorFactory& getFactory() const SK_OVERRIDE; |
| |
| private: |
| GrDistanceFieldLCDTextureEffect(GrTexture* texture, const GrTextureParams& params, |
| GrTexture* gamma, const GrTextureParams& gammaParams, |
| SkColor textColor, |
| uint32_t flags); |
| |
| virtual bool onIsEqual(const GrProcessor& other) const SK_OVERRIDE; |
| |
| GrTextureAccess fTextureAccess; |
| GrTextureAccess fGammaTextureAccess; |
| GrColor fTextColor; |
| uint32_t fFlags; |
| const GrShaderVar& fInTextureCoords; |
| |
| GR_DECLARE_GEOMETRY_PROCESSOR_TEST; |
| |
| typedef GrFragmentProcessor INHERITED; |
| }; |
| |
| #endif |