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Unified Diff: src/gpu/gl/GrGLSL.h

Issue 1202293002: Move GLSL-specific routines/classes to separate glsl directory (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Rename GrGLGLSL.{cpp,h} Created 5 years, 6 months ago
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Index: src/gpu/gl/GrGLSL.h
diff --git a/src/gpu/gl/GrGLSL.h b/src/gpu/gl/GrGLSL.h
deleted file mode 100644
index b338c991a6ca5415fcc157493b5bdea1cdb723a9..0000000000000000000000000000000000000000
--- a/src/gpu/gl/GrGLSL.h
+++ /dev/null
@@ -1,347 +0,0 @@
-/*
- * 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,
- /**
- * 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,
-};
-
-/**
- * Gets the most recent GLSL Generation compatible with the OpenGL context.
- */
-bool GrGetGLSLGeneration(const GrGLInterface* gl, GrGLSLGeneration* generation);
-
-bool GrGLSLSupportsNamedFragmentShaderOutputs(GrGLSLGeneration);
-
-/**
- * Returns a string to include at the beginning of a shader to declare the GLSL
- * version.
- */
-const char* GrGetGLSLVersionDecl(const GrGLContextInfo&);
-
-/**
- * Adds a line of GLSL code to declare the default precision for float types.
- */
-void GrGLSLAppendDefaultFloatPrecisionDeclaration(GrSLPrecision, GrGLStandard, SkString* out);
-
-/**
- * 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
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