Move GLSL-specific routines/classes to separate glsl directory

The purpose is to begin separating our GLSL-specific code from
our GL-specific code, so it can be used with the GL45 platform

Review URL: https://codereview.chromium.org/1202293002

5 files changed, 677 insertions, 0 deletions

diff --git a/src/gpu/glsl/GrGLSL.cpp b/src/gpu/glsl/GrGLSL.cpp
new file mode 100644
index 0000000000..c77b7fab20
--- /dev/null
+++ b/src/gpu/glsl/GrGLSL.cpp
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "GrGLSL.h"
+#include "SkString.h"
+
+bool GrGLSLSupportsNamedFragmentShaderOutputs(GrGLSLGeneration gen) {
+    switch (gen) {
+        case k110_GrGLSLGeneration:
+            return false;
+        case k130_GrGLSLGeneration:
+        case k140_GrGLSLGeneration:
+        case k150_GrGLSLGeneration:
+        case k330_GrGLSLGeneration:
+        case k310es_GrGLSLGeneration:
+            return true;
+    }
+    return false;
+}
+
+void GrGLSLMulVarBy4f(SkString* outAppend, const char* vec4VarName, const GrGLSLExpr4& mulFactor) {
+    if (mulFactor.isOnes()) {
+        *outAppend = SkString();
+    }
+
+    if (mulFactor.isZeros()) {
+        outAppend->appendf("%s = vec4(0);", vec4VarName);
+    } else {
+        outAppend->appendf("%s *= %s;", vec4VarName, mulFactor.c_str());
+    }
+}
diff --git a/src/gpu/glsl/GrGLSL.h b/src/gpu/glsl/GrGLSL.h
new file mode 100644
index 0000000000..efe31fe2dd
--- /dev/null
+++ b/src/gpu/glsl/GrGLSL.h
@@ -0,0 +1,326 @@
+/*
+ * 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 GrGLSL_DEFINED
+#define GrGLSL_DEFINED
+
+#include "GrTypesPriv.h"
+#include "SkString.h"
+
+// Limited set of GLSL versions we build shaders for. Caller should round
+// down the GLSL version to one of these enums.
+enum GrGLSLGeneration {
+    /**
+     * Desktop GLSL 1.10 and ES2 shading language (based on desktop GLSL 1.20)
+     */
+    k110_GrGLSLGeneration,
+    /**
+     * Desktop GLSL 1.30
+     */
+    k130_GrGLSLGeneration,
+    /**
+     * Desktop GLSL 1.40
+     */
+    k140_GrGLSLGeneration,
+    /**
+     * Desktop GLSL 1.50
+     */
+    k150_GrGLSLGeneration,
+    /**
+     * Desktop GLSL 3.30, and ES GLSL 3.00
+     */
+    k330_GrGLSLGeneration,
+    /**
+     * ES GLSL 3.10 only TODO Make GLSLCap objects to make this more granular
+     */
+    k310es_GrGLSLGeneration,
+};
+
+bool GrGLSLSupportsNamedFragmentShaderOutputs(GrGLSLGeneration);
+
+/**
+ * Gets the name of the function that should be used to sample a 2D texture. Coord type is used
+ * to indicate whether the texture is sampled using projective textured (kVec3f) or not (kVec2f).
+ */
+inline const char* GrGLSLTexture2DFunctionName(GrSLType coordType, GrGLSLGeneration glslGen) {
+    if (kVec2f_GrSLType == coordType) {
+        return glslGen >= k130_GrGLSLGeneration ? "texture" : "texture2D";
+    } else {
+        SkASSERT(kVec3f_GrSLType == coordType);
+        return glslGen >= k130_GrGLSLGeneration ? "textureProj" : "texture2DProj";
+    }
+}
+
+/**
+ * Converts a GrSLType to a string containing the name of the equivalent GLSL type.
+ */
+static inline const char* GrGLSLTypeString(GrSLType t) {
+    switch (t) {
+        case kVoid_GrSLType:
+            return "void";
+        case kFloat_GrSLType:
+            return "float";
+        case kVec2f_GrSLType:
+            return "vec2";
+        case kVec3f_GrSLType:
+            return "vec3";
+        case kVec4f_GrSLType:
+            return "vec4";
+        case kMat33f_GrSLType:
+            return "mat3";
+        case kMat44f_GrSLType:
+            return "mat4";
+        case kSampler2D_GrSLType:
+            return "sampler2D";
+        default:
+            SkFAIL("Unknown shader var type.");
+            return ""; // suppress warning
+    }
+}
+
+/** A generic base-class representing a GLSL expression.
+ * The instance can be a variable name, expression or vecN(0) or vecN(1). Does simple constant
+ * folding with help of 1 and 0.
+ *
+ * Clients should not use this class, rather the specific instantiations defined
+ * later, for example GrGLSLExpr4.
+ */
+template <typename Self>
+class GrGLSLExpr {
+public:
+    bool isOnes() const { return kOnes_ExprType == fType; }
+    bool isZeros() const { return kZeros_ExprType == fType; }
+
+    const char* c_str() const {
+        if (kZeros_ExprType == fType) {
+            return Self::ZerosStr();
+        } else if (kOnes_ExprType == fType) {
+            return Self::OnesStr();
+        }
+        SkASSERT(!fExpr.isEmpty()); // Empty expressions should not be used.
+        return fExpr.c_str();
+    }
+
+    bool isValid() const {
+        return kFullExpr_ExprType != fType || !fExpr.isEmpty();
+    }
+
+protected:
+    /** Constructs an invalid expression.
+     * Useful only as a return value from functions that never actually return
+     * this and instances that will be assigned to later. */
+    GrGLSLExpr()
+        : fType(kFullExpr_ExprType) {
+        // The only constructor that is allowed to build an empty expression.
+        SkASSERT(!this->isValid());
+    }
+
+    /** Constructs an expression with all components as value v */
+    explicit GrGLSLExpr(int v) {
+        if (v == 0) {
+            fType = kZeros_ExprType;
+        } else if (v == 1) {
+            fType = kOnes_ExprType;
+        } else {
+            fType = kFullExpr_ExprType;
+            fExpr.appendf(Self::CastIntStr(), v);
+        }
+    }
+
+    /** Constructs an expression from a string.
+     * Argument expr is a simple expression or a parenthesized expression. */
+    // TODO: make explicit once effects input Exprs.
+    GrGLSLExpr(const char expr[]) {
+        if (NULL == expr) {  // TODO: remove this once effects input Exprs.
+            fType = kOnes_ExprType;
+        } else {
+            fType = kFullExpr_ExprType;
+            fExpr = expr;
+        }
+        SkASSERT(this->isValid());
+    }
+
+    /** Constructs an expression from a string.
+     * Argument expr is a simple expression or a parenthesized expression. */
+    // TODO: make explicit once effects input Exprs.
+    GrGLSLExpr(const SkString& expr) {
+        if (expr.isEmpty()) {  // TODO: remove this once effects input Exprs.
+            fType = kOnes_ExprType;
+        } else {
+            fType = kFullExpr_ExprType;
+            fExpr = expr;
+        }
+        SkASSERT(this->isValid());
+    }
+
+    /** Constructs an expression from a string with one substitution. */
+    GrGLSLExpr(const char format[], const char in0[])
+        : fType(kFullExpr_ExprType) {
+        fExpr.appendf(format, in0);
+    }
+
+    /** Constructs an expression from a string with two substitutions. */
+    GrGLSLExpr(const char format[], const char in0[], const char in1[])
+        : fType(kFullExpr_ExprType) {
+        fExpr.appendf(format, in0, in1);
+    }
+
+    /** Returns expression casted to another type.
+     * Generic implementation that is called for non-trivial cases of casts. */
+    template <typename T>
+    static Self VectorCastImpl(const T& other);
+
+    /** Returns a GLSL multiplication: component-wise or component-by-scalar.
+     * The multiplication will be component-wise or multiply each component by a scalar.
+     *
+     * The returned expression will compute the value of:
+     *    vecN(in0.x * in1.x, ...) if dim(T0) == dim(T1) (component-wise)
+     *    vecN(in0.x * in1, ...) if dim(T1) == 1 (vector by scalar)
+     *    vecN(in0 * in1.x, ...) if dim(T0) == 1 (scalar by vector)
+     */
+    template <typename T0, typename T1>
+    static Self Mul(T0 in0, T1 in1);
+
+    /** Returns a GLSL addition: component-wise or add a scalar to each component.
+     * Return value computes:
+     *   vecN(in0.x + in1.x, ...) or vecN(in0.x + in1, ...) or vecN(in0 + in1.x, ...).
+     */
+    template <typename T0, typename T1>
+    static Self Add(T0 in0, T1 in1);
+
+    /** Returns a GLSL subtraction: component-wise or subtract compoments by a scalar.
+     * Return value computes
+     *   vecN(in0.x - in1.x, ...) or vecN(in0.x - in1, ...) or vecN(in0 - in1.x, ...).
+     */
+    template <typename T0, typename T1>
+    static Self Sub(T0 in0, T1 in1);
+
+    /** Returns expression that accesses component(s) of the expression.
+     * format should be the form "%s.x" where 'x' is the component(s) to access.
+     * Caller is responsible for making sure the amount of components in the
+     * format string is equal to dim(T).
+     */
+    template <typename T>
+    T extractComponents(const char format[]) const;
+
+private:
+    enum ExprType {
+        kZeros_ExprType,
+        kOnes_ExprType,
+        kFullExpr_ExprType,
+    };
+    ExprType fType;
+    SkString fExpr;
+};
+
+class GrGLSLExpr1;
+class GrGLSLExpr4;
+
+/** Class representing a float GLSL expression. */
+class GrGLSLExpr1 : public GrGLSLExpr<GrGLSLExpr1> {
+public:
+    GrGLSLExpr1()
+        : INHERITED() {
+    }
+    explicit GrGLSLExpr1(int v)
+        : INHERITED(v) {
+    }
+    GrGLSLExpr1(const char* expr)
+        : INHERITED(expr) {
+    }
+    GrGLSLExpr1(const SkString& expr)
+        : INHERITED(expr) {
+    }
+
+    static GrGLSLExpr1 VectorCast(const GrGLSLExpr1& expr);
+
+private:
+    GrGLSLExpr1(const char format[], const char in0[])
+        : INHERITED(format, in0) {
+    }
+    GrGLSLExpr1(const char format[], const char in0[], const char in1[])
+        : INHERITED(format, in0, in1) {
+    }
+
+    static const char* ZerosStr();
+    static const char* OnesStr();
+    static const char* CastStr();
+    static const char* CastIntStr();
+
+    friend GrGLSLExpr1 operator*(const GrGLSLExpr1& in0, const GrGLSLExpr1&in1);
+    friend GrGLSLExpr1 operator+(const GrGLSLExpr1& in0, const GrGLSLExpr1&in1);
+    friend GrGLSLExpr1 operator-(const GrGLSLExpr1& in0, const GrGLSLExpr1&in1);
+
+    friend class GrGLSLExpr<GrGLSLExpr1>;
+    friend class GrGLSLExpr<GrGLSLExpr4>;
+
+    typedef GrGLSLExpr<GrGLSLExpr1> INHERITED;
+};
+
+/** Class representing a float vector (vec4) GLSL expression. */
+class GrGLSLExpr4 : public GrGLSLExpr<GrGLSLExpr4> {
+public:
+    GrGLSLExpr4()
+        : INHERITED() {
+    }
+    explicit GrGLSLExpr4(int v)
+        : INHERITED(v) {
+    }
+    GrGLSLExpr4(const char* expr)
+        : INHERITED(expr) {
+    }
+    GrGLSLExpr4(const SkString& expr)
+        : INHERITED(expr) {
+    }
+
+    typedef GrGLSLExpr1 AExpr;
+    AExpr a() const;
+
+    /** GLSL vec4 cast / constructor, eg vec4(floatv) -> vec4(floatv, floatv, floatv, floatv) */
+    static GrGLSLExpr4 VectorCast(const GrGLSLExpr1& expr);
+    static GrGLSLExpr4 VectorCast(const GrGLSLExpr4& expr);
+
+private:
+    GrGLSLExpr4(const char format[], const char in0[])
+        : INHERITED(format, in0) {
+    }
+    GrGLSLExpr4(const char format[], const char in0[], const char in1[])
+        : INHERITED(format, in0, in1) {
+    }
+
+    static const char* ZerosStr();
+    static const char* OnesStr();
+    static const char* CastStr();
+    static const char* CastIntStr();
+
+    // The vector-by-scalar and scalar-by-vector binary operations.
+    friend GrGLSLExpr4 operator*(const GrGLSLExpr1& in0, const GrGLSLExpr4&in1);
+    friend GrGLSLExpr4 operator+(const GrGLSLExpr1& in0, const GrGLSLExpr4&in1);
+    friend GrGLSLExpr4 operator-(const GrGLSLExpr1& in0, const GrGLSLExpr4&in1);
+    friend GrGLSLExpr4 operator*(const GrGLSLExpr4& in0, const GrGLSLExpr1&in1);
+    friend GrGLSLExpr4 operator+(const GrGLSLExpr4& in0, const GrGLSLExpr1&in1);
+    friend GrGLSLExpr4 operator-(const GrGLSLExpr4& in0, const GrGLSLExpr1&in1);
+
+    // The vector-by-vector, i.e. component-wise, binary operations.
+    friend GrGLSLExpr4 operator*(const GrGLSLExpr4& in0, const GrGLSLExpr4&in1);
+    friend GrGLSLExpr4 operator+(const GrGLSLExpr4& in0, const GrGLSLExpr4&in1);
+    friend GrGLSLExpr4 operator-(const GrGLSLExpr4& in0, const GrGLSLExpr4&in1);
+
+    friend class GrGLSLExpr<GrGLSLExpr4>;
+
+    typedef GrGLSLExpr<GrGLSLExpr4> INHERITED;
+};
+
+/**
+ * Does an inplace mul, *=, of vec4VarName by mulFactor.
+ * A semicolon is added after the assignment.
+ */
+void GrGLSLMulVarBy4f(SkString* outAppend, const char* vec4VarName, const GrGLSLExpr4& mulFactor);
+
+#include "GrGLSL_impl.h"
+
+#endif
diff --git a/src/gpu/glsl/GrGLSLCaps.cpp b/src/gpu/glsl/GrGLSLCaps.cpp
new file mode 100755
index 0000000000..cb72864347
--- /dev/null
+++ b/src/gpu/glsl/GrGLSLCaps.cpp
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+
+#include "GrGLSLCaps.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////
+
+GrGLSLCaps::GrGLSLCaps(const GrContextOptions& options) {
+    fDropsTileOnZeroDivide = false;
+    fFBFetchSupport = false;
+    fFBFetchNeedsCustomOutput = false;
+    fBindlessTextureSupport = false;
+    fAdvBlendEqInteraction = kNotSupported_AdvBlendEqInteraction;
+    fFBFetchColorName = NULL;
+    fFBFetchExtensionString = NULL;
+}
+
+SkString GrGLSLCaps::dump() const {
+    SkString r = INHERITED::dump();
+
+    static const char* kAdvBlendEqInteractionStr[] = {
+        "Not Supported",
+        "Automatic",
+        "General Enable",
+        "Specific Enables",
+    };
+    GR_STATIC_ASSERT(0 == kNotSupported_AdvBlendEqInteraction);
+    GR_STATIC_ASSERT(1 == kAutomatic_AdvBlendEqInteraction);
+    GR_STATIC_ASSERT(2 == kGeneralEnable_AdvBlendEqInteraction);
+    GR_STATIC_ASSERT(3 == kSpecificEnables_AdvBlendEqInteraction);
+    GR_STATIC_ASSERT(SK_ARRAY_COUNT(kAdvBlendEqInteractionStr) == kLast_AdvBlendEqInteraction + 1);
+
+    r.appendf("--- GLSL-Specific ---\n");
+
+    r.appendf("FB Fetch Support: %s\n", (fFBFetchSupport ? "YES" : "NO"));
+    r.appendf("Drops tile on zero divide: %s\n", (fDropsTileOnZeroDivide ? "YES" : "NO"));
+    r.appendf("Bindless texture support: %s\n", (fBindlessTextureSupport ? "YES" : "NO"));
+    r.appendf("Advanced blend equation interaction: %s\n",
+              kAdvBlendEqInteractionStr[fAdvBlendEqInteraction]);
+    return r;
+}
+
diff --git a/src/gpu/glsl/GrGLSLCaps.h b/src/gpu/glsl/GrGLSLCaps.h
new file mode 100755
index 0000000000..3264535704
--- /dev/null
+++ b/src/gpu/glsl/GrGLSLCaps.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+
+#ifndef GrGLSLCaps_DEFINED
+#define GrGLSLCaps_DEFINED
+
+#include "GrCaps.h"
+#include "GrGLSL.h"
+
+class GrGLSLCaps : public GrShaderCaps {
+public:
+    SK_DECLARE_INST_COUNT(GrGLSLCaps)
+
+    /**
+    * Indicates how GLSL must interact with advanced blend equations. The KHR extension requires
+    * special layout qualifiers in the fragment shader.
+    */
+    enum AdvBlendEqInteraction {
+        kNotSupported_AdvBlendEqInteraction,     //<! No _blend_equation_advanced extension
+        kAutomatic_AdvBlendEqInteraction,        //<! No interaction required
+        kGeneralEnable_AdvBlendEqInteraction,    //<! layout(blend_support_all_equations) out
+        kSpecificEnables_AdvBlendEqInteraction,  //<! Specific layout qualifiers per equation
+
+        kLast_AdvBlendEqInteraction = kSpecificEnables_AdvBlendEqInteraction
+    };
+
+    /**
+     * Initializes the GrGLSLCaps to a default set of features
+     */
+    GrGLSLCaps(const GrContextOptions&);
+
+    /**
+     * Some helper functions for encapsulating various extensions to read FB Buffer on openglES
+     *
+     * TODO(joshualitt) On desktop opengl 4.2+ we can achieve something similar to this effect
+     */
+    bool fbFetchSupport() const { return fFBFetchSupport; }
+
+    bool fbFetchNeedsCustomOutput() const { return fFBFetchNeedsCustomOutput; }
+
+    bool bindlessTextureSupport() const { return fBindlessTextureSupport; }
+
+    const char* fbFetchColorName() const { return fFBFetchColorName; }
+
+    const char* fbFetchExtensionString() const { return fFBFetchExtensionString; }
+
+    bool dropsTileOnZeroDivide() const { return fDropsTileOnZeroDivide; }
+
+    AdvBlendEqInteraction advBlendEqInteraction() const { return fAdvBlendEqInteraction; }
+
+    bool mustEnableAdvBlendEqs() const {
+        return fAdvBlendEqInteraction >= kGeneralEnable_AdvBlendEqInteraction;
+    }
+
+    bool mustEnableSpecificAdvBlendEqs() const {
+        return fAdvBlendEqInteraction == kSpecificEnables_AdvBlendEqInteraction;
+    }
+    
+    bool mustDeclareFragmentShaderOutput() const {
+        return fGLSLGeneration > k110_GrGLSLGeneration;
+    }
+
+    GrGLSLGeneration generation() const { return fGLSLGeneration; }
+
+    /**
+    * Returns a string containing the caps info.
+    */
+    SkString dump() const override;
+
+private:
+    GrGLSLGeneration fGLSLGeneration;
+    
+    bool fDropsTileOnZeroDivide : 1;
+    bool fFBFetchSupport : 1;
+    bool fFBFetchNeedsCustomOutput : 1;
+    bool fBindlessTextureSupport : 1;
+
+    const char* fFBFetchColorName;
+    const char* fFBFetchExtensionString;
+
+    AdvBlendEqInteraction fAdvBlendEqInteraction;
+
+    friend class GrGLCaps;  // For initialization.
+
+    typedef GrShaderCaps INHERITED;
+};
+
+
+#endif
diff --git a/src/gpu/glsl/GrGLSL_impl.h b/src/gpu/glsl/GrGLSL_impl.h
new file mode 100644
index 0000000000..bdd69cc76b
--- /dev/null
+++ b/src/gpu/glsl/GrGLSL_impl.h
@@ -0,0 +1,175 @@
+/*
+ * 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 GrGLSL_impl_DEFINED
+#define GrGLSL_impl_DEFINED
+
+template<typename Self>
+template<typename T>
+inline Self GrGLSLExpr<Self>::VectorCastImpl(const T& expr) {
+    if (expr.isZeros()) {
+        return Self(0);
+    }
+    if (expr.isOnes()) {
+        return Self(1);
+    }
+    return Self(Self::CastStr(), expr.c_str());
+}
+
+template<typename Self>
+template<typename T0, typename T1>
+inline Self GrGLSLExpr<Self>::Mul(T0 in0, T1 in1) {
+    if (in0.isZeros() || in1.isZeros()) {
+        return Self(0);
+    }
+    if (in0.isOnes()) {
+        return Self::VectorCast(in1);
+    }
+    if (in1.isOnes()) {
+        return Self::VectorCast(in0);
+    }
+    return Self("(%s * %s)", in0.c_str(), in1.c_str());
+}
+
+template<typename Self>
+template<typename T0, typename T1>
+inline Self GrGLSLExpr<Self>::Add(T0 in0, T1 in1) {
+    if (in1.isZeros()) {
+        return Self::VectorCast(in0);
+    }
+    if (in0.isZeros()) {
+        return Self::VectorCast(in1);
+    }
+    if (in0.isOnes() && in1.isOnes()) {
+        return Self(2);
+    }
+    return Self("(%s + %s)", in0.c_str(), in1.c_str());
+}
+
+template<typename Self>
+template<typename T0, typename T1>
+inline Self GrGLSLExpr<Self>::Sub(T0 in0, T1 in1) {
+    if (in1.isZeros()) {
+        return Self::VectorCast(in0);
+    }
+    if (in1.isOnes()) {
+        if (in0.isOnes()) {
+            return Self(0);
+        }
+    }
+
+    return Self("(%s - %s)", in0.c_str(), in1.c_str());
+}
+
+template <typename Self>
+template <typename T>
+T GrGLSLExpr<Self>::extractComponents(const char format[]) const {
+    if (this->isZeros()) {
+        return T(0);
+    }
+    if (this->isOnes()) {
+        return T(1);
+    }
+    return T(format, this->c_str());
+}
+
+inline GrGLSLExpr1 GrGLSLExpr1::VectorCast(const GrGLSLExpr1& expr) {
+    return expr;
+}
+
+inline const char* GrGLSLExpr1::ZerosStr() {
+    return "0";
+}
+
+inline const char* GrGLSLExpr1::OnesStr() {
+    return "1.0";
+}
+
+// GrGLSLExpr1::CastStr() is unimplemented because using them is likely an
+// error. This is now caught compile-time.
+
+inline const char* GrGLSLExpr1::CastIntStr() {
+    return "%d";
+}
+
+inline GrGLSLExpr1 operator*(const GrGLSLExpr1& in0, const GrGLSLExpr1& in1) {
+    return GrGLSLExpr1::Mul(in0, in1);
+}
+
+inline GrGLSLExpr1 operator+(const GrGLSLExpr1& in0, const GrGLSLExpr1& in1) {
+    return GrGLSLExpr1::Add(in0, in1);
+}
+
+inline GrGLSLExpr1 operator-(const GrGLSLExpr1& in0, const GrGLSLExpr1& in1) {
+    return GrGLSLExpr1::Sub(in0, in1);
+}
+
+inline const char* GrGLSLExpr4::ZerosStr() {
+    return "vec4(0)";
+}
+
+inline const char* GrGLSLExpr4::OnesStr() {
+    return "vec4(1)";
+}
+
+inline const char* GrGLSLExpr4::CastStr() {
+    return "vec4(%s)";
+}
+
+inline const char* GrGLSLExpr4::CastIntStr() {
+    return "vec4(%d)";
+}
+
+inline GrGLSLExpr4 GrGLSLExpr4::VectorCast(const GrGLSLExpr1& expr) {
+    return INHERITED::VectorCastImpl(expr);
+}
+
+inline GrGLSLExpr4 GrGLSLExpr4::VectorCast(const GrGLSLExpr4& expr) {
+    return expr;
+}
+
+inline GrGLSLExpr4::AExpr GrGLSLExpr4::a() const {
+    return this->extractComponents<GrGLSLExpr4::AExpr>("%s.a");
+}
+
+inline GrGLSLExpr4 operator*(const GrGLSLExpr1& in0, const GrGLSLExpr4& in1) {
+    return GrGLSLExpr4::Mul(in0, in1);
+}
+
+inline GrGLSLExpr4 operator+(const GrGLSLExpr1& in0, const GrGLSLExpr4& in1) {
+    return GrGLSLExpr4::Add(in0, in1);
+}
+
+inline GrGLSLExpr4 operator-(const GrGLSLExpr1& in0, const GrGLSLExpr4& in1) {
+    return GrGLSLExpr4::Sub(in0, in1);
+}
+
+inline GrGLSLExpr4 operator*(const GrGLSLExpr4& in0, const GrGLSLExpr1& in1) {
+    return GrGLSLExpr4::Mul(in0, in1);
+}
+
+inline GrGLSLExpr4 operator+(const GrGLSLExpr4& in0, const GrGLSLExpr1& in1) {
+    return GrGLSLExpr4::Add(in0, in1);
+}
+
+inline GrGLSLExpr4 operator-(const GrGLSLExpr4& in0, const GrGLSLExpr1& in1) {
+    return GrGLSLExpr4::Sub(in0, in1);
+}
+
+inline GrGLSLExpr4 operator*(const GrGLSLExpr4& in0, const GrGLSLExpr4& in1) {
+    return GrGLSLExpr4::Mul(in0, in1);
+}
+
+inline GrGLSLExpr4 operator+(const GrGLSLExpr4& in0, const GrGLSLExpr4& in1) {
+    return GrGLSLExpr4::Add(in0, in1);
+}
+
+inline GrGLSLExpr4 operator-(const GrGLSLExpr4& in0, const GrGLSLExpr4& in1) {
+    return GrGLSLExpr4::Sub(in0, in1);
+}
+
+#endif