The Tor Browser: gfx/skia/trunk/src/gpu/gl/GrGLSL.h@6474c204b198 (annotated)

gfx/skia/trunk/src/gpu/gl/GrGLSL.h@6474c204b198 (annotated)

gfx/skia/trunk/src/gpu/gl/GrGLSL.h

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
  * 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 "gl/GrGLInterface.h"
 #include "GrColor.h"
 #include "GrTypesPriv.h"
 #include "SkString.h"
 class GrGLContextInfo;
 class GrGLShaderVar;
 // 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,
 };
 /**
  * Gets the most recent GLSL Generation compatible with the OpenGL context.
  */
 GrGLSLGeneration GrGetGLSLGeneration(const GrGLInterface* gl);
 /**
  * Returns a string to include at the beginning of a shader to declare the GLSL
  * version.
  */
 const char* GrGetGLSLVersionDecl(const GrGLContextInfo&);
 /**
  * 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:
             GrCrash("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();
     }
 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);
     }
     bool isValid() const {
         return kFullExpr_ExprType != fType || !fExpr.isEmpty();
     }
     /** 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 and newline are added after the assignment.
  */
 void GrGLSLMulVarBy4f(SkString* outAppend, unsigned tabCnt,
                       const char* vec4VarName, const GrGLSLExpr4& mulFactor);
 #include "GrGLSL_impl.h"
 #endif

The Tor Browser / annotate

gfx/skia/trunk/src/gpu/gl/GrGLSL.h@6474c204b198 (annotated)

gfx/skia/trunk/src/gpu/gl/GrGLSL.h