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#ifndef _RRVERTEXATTRIB_HPP
#define _RRVERTEXATTRIB_HPP
/*-------------------------------------------------------------------------
* drawElements Quality Program Reference Renderer
* -----------------------------------------------
*
* Copyright 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*//*!
* \file
* \brief Vertex attribute fetch.
*//*--------------------------------------------------------------------*/
#include "rrDefs.hpp"
#include "rrGenericVector.hpp"
#include "tcuVector.hpp"
namespace rr
{
enum VertexAttribType
{
// Can only be read as floats
VERTEXATTRIBTYPE_FLOAT = 0,
VERTEXATTRIBTYPE_HALF,
VERTEXATTRIBTYPE_FIXED,
VERTEXATTRIBTYPE_DOUBLE,
// Can only be read as floats, will be normalized
VERTEXATTRIBTYPE_NONPURE_UNORM8,
VERTEXATTRIBTYPE_NONPURE_UNORM16,
VERTEXATTRIBTYPE_NONPURE_UNORM32,
VERTEXATTRIBTYPE_NONPURE_UNORM_2_10_10_10_REV, //!< Packed format, only size = 4 is allowed
// Clamped formats, GLES3-style conversion: max{c / (2^(b-1) - 1), -1 }
VERTEXATTRIBTYPE_NONPURE_SNORM8_CLAMP,
VERTEXATTRIBTYPE_NONPURE_SNORM16_CLAMP,
VERTEXATTRIBTYPE_NONPURE_SNORM32_CLAMP,
VERTEXATTRIBTYPE_NONPURE_SNORM_2_10_10_10_REV_CLAMP, //!< Packed format, only size = 4 is allowed
// Scaled formats, GLES2-style conversion: (2c + 1) / (2^b - 1)
VERTEXATTRIBTYPE_NONPURE_SNORM8_SCALE,
VERTEXATTRIBTYPE_NONPURE_SNORM16_SCALE,
VERTEXATTRIBTYPE_NONPURE_SNORM32_SCALE,
VERTEXATTRIBTYPE_NONPURE_SNORM_2_10_10_10_REV_SCALE, //!< Packed format, only size = 4 is allowed
// can only be read as float, will not be normalized
VERTEXATTRIBTYPE_NONPURE_UINT8,
VERTEXATTRIBTYPE_NONPURE_UINT16,
VERTEXATTRIBTYPE_NONPURE_UINT32,
VERTEXATTRIBTYPE_NONPURE_INT8,
VERTEXATTRIBTYPE_NONPURE_INT16,
VERTEXATTRIBTYPE_NONPURE_INT32,
VERTEXATTRIBTYPE_NONPURE_UINT_2_10_10_10_REV, //!< Packed format, only size = 4 is allowed
VERTEXATTRIBTYPE_NONPURE_INT_2_10_10_10_REV, //!< Packed format, only size = 4 is allowed
// can only be read as integers
VERTEXATTRIBTYPE_PURE_UINT8,
VERTEXATTRIBTYPE_PURE_UINT16,
VERTEXATTRIBTYPE_PURE_UINT32,
VERTEXATTRIBTYPE_PURE_INT8,
VERTEXATTRIBTYPE_PURE_INT16,
VERTEXATTRIBTYPE_PURE_INT32,
// reordered formats of GL_ARB_vertex_array_bgra
VERTEXATTRIBTYPE_NONPURE_UNORM8_BGRA,
VERTEXATTRIBTYPE_NONPURE_UNORM_2_10_10_10_REV_BGRA,
VERTEXATTRIBTYPE_NONPURE_SNORM_2_10_10_10_REV_CLAMP_BGRA,
VERTEXATTRIBTYPE_NONPURE_SNORM_2_10_10_10_REV_SCALE_BGRA,
// can be read as anything
VERTEXATTRIBTYPE_DONT_CARE, //!< Do not enforce type checking when reading GENERIC attribute. Used for current client side attributes.
VERTEXATTRIBTYPE_LAST
};
/*--------------------------------------------------------------------*//*!
* \brief Vertex attribute slot
*
* Vertex attribute type specifies component type for attribute and it
* includes signed & normalized bits as well.
*
* Attribute size specifies how many components there are per vertex.
* If size is 0, no components are fetched, ie. vertex attribute slot
* is disabled.
*
* Divisor specifies the rate at which vertex attribute advances. If it is
* zero, attribute is advanced per vertex. If divisor is non-zero, attribute
* advances once per instanceDivisor instances.
*
* Pointer is used if not null, otherwise generic attribute is used instead
* and in such case only DONT_CARE is valid attribute type.
*//*--------------------------------------------------------------------*/
struct VertexAttrib
{
VertexAttribType type; //!< Attribute component type.
int size; //!< Number of components, valid range is [0,4].
int stride; //!< Number of bytes two consecutive elements differ by. Zero works as in GL. Valid range is [0, inf).
int instanceDivisor; //!< Vertex attribute divisor.
const void* pointer; //!< Data pointer.
GenericVec4 generic; //!< Generic attribute, used if pointer is null.
VertexAttrib (void)
: type (VERTEXATTRIBTYPE_FLOAT)
, size (0)
, stride (0)
, instanceDivisor (0)
, pointer (DE_NULL)
{
}
VertexAttrib (VertexAttribType type_, int size_, int stride_, int instanceDivisor_, const void* pointer_)
: type (type_)
, size (size_)
, stride (stride_)
, instanceDivisor (instanceDivisor_)
, pointer (pointer_)
{
}
template<typename ScalarType>
explicit VertexAttrib (const tcu::Vector<ScalarType, 4>& generic_)
: type (VERTEXATTRIBTYPE_DONT_CARE)
, size (0)
, stride (0)
, instanceDivisor (0)
, pointer (DE_NULL)
, generic (generic_)
{
}
} DE_WARN_UNUSED_TYPE;
bool isValidVertexAttrib (const VertexAttrib& vertexAttrib);
// \todo [2013-04-01 pyry] Queries: isReadFloatValid(), isReadIntValid() ...
void readVertexAttrib (tcu::Vec4& dst, const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx, const int baseInstanceNdx = 0);
void readVertexAttrib (tcu::IVec4& dst, const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx, const int baseInstanceNdx = 0);
void readVertexAttrib (tcu::UVec4& dst, const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx, const int baseInstanceNdx = 0);
// Helpers that return by value (trivial for compiler to optimize).
inline tcu::Vec4 readVertexAttribFloat (const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx, const int baseInstanceNdx = 0)
{
tcu::Vec4 v;
readVertexAttrib(v, vertexAttrib, instanceNdx, vertexNdx, baseInstanceNdx);
return v;
}
inline tcu::IVec4 readVertexAttribInt (const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx, const int baseInstanceNdx = 0)
{
tcu::IVec4 v;
readVertexAttrib(v, vertexAttrib, instanceNdx, vertexNdx, baseInstanceNdx);
return v;
}
inline tcu::UVec4 readVertexAttribUint (const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx, const int baseInstanceNdx = 0)
{
tcu::UVec4 v;
readVertexAttrib(v, vertexAttrib, instanceNdx, vertexNdx, baseInstanceNdx);
return v;
}
} // rr
#endif // _RRVERTEXATTRIB_HPP