Move GLSL-specific routines/classes to separate glsl directory

src/gpu/gl/GrGLSL_impl.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 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