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//
// Copyright (c) 2013 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// Helper structure describing a single vertex attribute
//
#ifndef LIBANGLE_VERTEXATTRIBUTE_H_
#define LIBANGLE_VERTEXATTRIBUTE_H_
#include "libANGLE/Buffer.h"
namespace gl
{
struct VertexAttribute
{
bool enabled; // From glEnable/DisableVertexAttribArray
GLenum type;
GLuint size;
bool normalized;
bool pureInteger;
GLuint stride; // 0 means natural stride
union
{
const GLvoid *pointer;
GLintptr offset;
};
BindingPointer<Buffer> buffer; // Captured when glVertexAttribPointer is called.
GLuint divisor;
VertexAttribute();
};
bool operator==(const VertexAttribute &a, const VertexAttribute &b);
bool operator!=(const VertexAttribute &a, const VertexAttribute &b);
template <typename T>
T QuerySingleVertexAttributeParameter(const VertexAttribute& attrib, GLenum pname);
size_t ComputeVertexAttributeTypeSize(const VertexAttribute& attrib);
size_t ComputeVertexAttributeStride(const VertexAttribute& attrib);
size_t ComputeVertexAttributeElementCount(const VertexAttribute &attrib,
size_t drawCount,
size_t instanceCount);
struct VertexAttribCurrentValueData
{
union
{
GLfloat FloatValues[4];
GLint IntValues[4];
GLuint UnsignedIntValues[4];
};
GLenum Type;
VertexAttribCurrentValueData();
void setFloatValues(const GLfloat floatValues[4]);
void setIntValues(const GLint intValues[4]);
void setUnsignedIntValues(const GLuint unsignedIntValues[4]);
};
bool operator==(const VertexAttribCurrentValueData &a, const VertexAttribCurrentValueData &b);
bool operator!=(const VertexAttribCurrentValueData &a, const VertexAttribCurrentValueData &b);
}
#include "VertexAttribute.inl"
#endif // LIBANGLE_VERTEXATTRIBUTE_H_
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