1/*
2 * Copyright 2014 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#ifndef GrGLVertexShader_DEFINED
9#define GrGLVertexShader_DEFINED
10
11#include "GrGLShaderBuilder.h"
12#include "GrGeometryProcessor.h"
13
14class GrGLVarying;
15
16class GrGLVertexBuilder : public GrGLShaderBuilder {
17public:
18    GrGLVertexBuilder(GrGLProgramBuilder* program);
19
20    void transformToNormalizedDeviceSpace(const GrShaderVar& posVar);
21    void emitAttributes(const GrGeometryProcessor& gp);
22
23    void addAttribute(const GrGeometryProcessor::Attribute* attr) {
24        this->addAttribute(GrShaderVar(attr->fName,
25                                       GrVertexAttribTypeToSLType(attr->fType),
26                                       GrShaderVar::kAttribute_TypeModifier,
27                                       GrShaderVar::kNonArray,
28                                       attr->fPrecision));
29    }
30
31private:
32    /*
33     * Internal call for GrGLProgramBuilder.addVarying
34     */
35    void addVarying(const char* name, GrGLVarying*);
36
37    /*
38     * private helpers for compilation by GrGLProgramBuilder
39     */
40    void bindVertexAttributes(GrGLuint programID);
41    bool compileAndAttachShaders(GrGLuint programId, SkTDArray<GrGLuint>* shaderIds);
42
43    // an internal call which checks for uniquness of a var before adding it to the list of inputs
44    bool addAttribute(const GrShaderVar& var);
45
46    const char* fRtAdjustName;
47
48    friend class GrGLProgramBuilder;
49
50    typedef GrGLShaderBuilder INHERITED;
51};
52
53#endif
54