kaetemi
10 years ago
parent
5ef419bce3
commit
65a2f9dad7
@ -0,0 +1,116 @@
|
||||
/*
|
||||
|
||||
Copyright (C) 2015 Jan Boon <jan.boon@kaetemi.be>
|
||||
All rights reserved.
|
||||
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are met:
|
||||
|
||||
* Redistributions of source code must retain the above copyright notice, this
|
||||
list of conditions and the following disclaimer.
|
||||
|
||||
* Redistributions in binary form must reproduce the above copyright notice,
|
||||
this list of conditions and the following disclaimer in the documentation
|
||||
and/or other materials provided with the distribution.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
||||
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
*/
|
||||
|
||||
#ifndef NL_UNIFORM_BUFFER_FORMAT_H
|
||||
#define NL_UNIFORM_BUFFER_FORMAT_H
|
||||
|
||||
#include <nel/misc/types_nl.h>
|
||||
#include <nel/misc/string_mapper.h>
|
||||
|
||||
namespace NL3D {
|
||||
|
||||
// Uniform buffer format generation following glsl std140 rules
|
||||
class CUniformBufferFormat
|
||||
{
|
||||
public:
|
||||
// When changing, update
|
||||
// - s_TypeAlignment
|
||||
// - s_TypeSize
|
||||
// - NL3D::NLDRIVERGL3::s_TypeKeyword
|
||||
enum TType
|
||||
{
|
||||
Float, // float
|
||||
FloatVec2, // CVector2D
|
||||
FloatVec3,
|
||||
FloatVec4, // CVector
|
||||
SInt, // sint32
|
||||
SIntVec2,
|
||||
SIntVec3,
|
||||
SIntVec4,
|
||||
UInt, // uint32
|
||||
UIntVec2,
|
||||
UIntVec3,
|
||||
UIntVec4,
|
||||
Bool,
|
||||
BoolVec2,
|
||||
BoolVec3,
|
||||
BoolVec4,
|
||||
FloatMat2,
|
||||
FloatMat3,
|
||||
FloatMat4, // CMatrix
|
||||
FloatMat2x3,
|
||||
FloatMat2x4,
|
||||
FloatMat3x2,
|
||||
FloatMat3x4,
|
||||
FloatMat4x2,
|
||||
FloatMat4x3,
|
||||
};
|
||||
|
||||
struct CEntry
|
||||
{
|
||||
NLMISC::TStringId Name;
|
||||
TType Type;
|
||||
sint Offset;
|
||||
sint Count;
|
||||
|
||||
inline sint stride() const
|
||||
{
|
||||
return Count == 1
|
||||
? s_TypeSize[Type]
|
||||
: ((s_TypeSize[Type] + 15) & ~0xF);
|
||||
}
|
||||
inline sint size() const
|
||||
{
|
||||
return stride() * Count;
|
||||
}
|
||||
};
|
||||
|
||||
// Push a variable. Returns the byte offset in uniform buffer
|
||||
// Note: Does not check for duplicate names. However, names must be unique
|
||||
sint push(const std::string &name, TType type, sint count = 1);
|
||||
|
||||
inline const CEntry &get(sint i) const { return m_Entries[i]; }
|
||||
inline size_t size() const { return m_Entries.size(); }
|
||||
inline void clear() { m_Entries.clear(); }
|
||||
|
||||
private:
|
||||
static const sint s_TypeAlignment[];
|
||||
static const sint s_TypeSize[];
|
||||
|
||||
typedef std::vector<CEntry> TEntries;
|
||||
TEntries m_Entries;
|
||||
|
||||
};
|
||||
|
||||
void testUniformBufferFormat(CUniformBufferFormat &ubf);
|
||||
|
||||
} /* namespace NL3D */
|
||||
|
||||
#endif /* #ifndef NL_UNIFORM_BUFFER_FORMAT_H */
|
||||
|
||||
/* end of file */
|
||||
@ -0,0 +1,149 @@
|
||||
/*
|
||||
|
||||
Copyright (C) 2015 Jan Boon <jan.boon@kaetemi.be>
|
||||
All rights reserved.
|
||||
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are met:
|
||||
|
||||
* Redistributions of source code must retain the above copyright notice, this
|
||||
list of conditions and the following disclaimer.
|
||||
|
||||
* Redistributions in binary form must reproduce the above copyright notice,
|
||||
this list of conditions and the following disclaimer in the documentation
|
||||
and/or other materials provided with the distribution.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
||||
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
*/
|
||||
|
||||
#include "std3d.h"
|
||||
#include <nel/3d/uniform_buffer_format.h>
|
||||
|
||||
#include <nel/misc/debug.h>
|
||||
|
||||
namespace NL3D {
|
||||
|
||||
const sint CUniformBufferFormat::s_TypeAlignment[] = {
|
||||
4, // Float
|
||||
8,
|
||||
16,
|
||||
16,
|
||||
4, // SInt
|
||||
8,
|
||||
16,
|
||||
16,
|
||||
4, // UInt
|
||||
8,
|
||||
16,
|
||||
16,
|
||||
4, // Bool
|
||||
8,
|
||||
16,
|
||||
16,
|
||||
16, // FloatMat2
|
||||
16,
|
||||
16,
|
||||
16, // FloatMat2x3
|
||||
16,
|
||||
16, // FloatMat3x2
|
||||
16,
|
||||
16, // FloatMat4x2
|
||||
16,
|
||||
};
|
||||
|
||||
const sint CUniformBufferFormat::s_TypeSize[] = {
|
||||
4, // Float
|
||||
8,
|
||||
12,
|
||||
16,
|
||||
4, // SInt
|
||||
8,
|
||||
12,
|
||||
16,
|
||||
4, // UInt
|
||||
8,
|
||||
12,
|
||||
16,
|
||||
4, // Bool
|
||||
8,
|
||||
12,
|
||||
16,
|
||||
16 + 16, // FloatMat2
|
||||
16 + 16 + 16, // FloatMat3
|
||||
16 + 16 + 16 + 16, // FloatMat4
|
||||
16 + 16, // FloatMat2x3
|
||||
16 + 16, // FloatMat2x4
|
||||
16 + 16 + 16, // FloatMat3x2
|
||||
16 + 16 + 16, // FloatMat3x4
|
||||
16 + 16 + 16 + 16, // FloatMat4x2
|
||||
16 + 16 + 16 + 16, // FloatMat4x3
|
||||
};
|
||||
|
||||
sint CUniformBufferFormat::push(const std::string &name, TType type, sint count)
|
||||
{
|
||||
nlassert(count > 0);
|
||||
sint baseAlign = count == 1
|
||||
? s_TypeAlignment[type]
|
||||
: ((s_TypeAlignment[type] + 15) & ~0xF);
|
||||
sint baseOffset = m_Entries.size()
|
||||
? m_Entries.back().Offset + m_Entries.back().size()
|
||||
: 0;
|
||||
sint alignOffset = baseOffset;
|
||||
alignOffset += (baseAlign - 1);
|
||||
alignOffset &= ~(baseAlign - 1); // Note: alignment MUST BE power of 2 for this to work
|
||||
m_Entries.resize(m_Entries.size() + 1);
|
||||
CEntry &entry = m_Entries.back();
|
||||
entry.Name = NLMISC::CStringMapper::map(name);
|
||||
entry.Type = type;
|
||||
entry.Offset = alignOffset;
|
||||
entry.Count = count;
|
||||
return alignOffset;
|
||||
}
|
||||
|
||||
void testUniformBufferFormat(CUniformBufferFormat &ubf)
|
||||
{
|
||||
sint offset;
|
||||
offset = ubf.push("a", CUniformBufferFormat::Float);
|
||||
nlassert(offset == 0);
|
||||
offset = ubf.push("b", CUniformBufferFormat::FloatVec2);
|
||||
nlassert(offset == 8);
|
||||
offset = ubf.push("c", CUniformBufferFormat::FloatVec3);
|
||||
nlassert(offset == 16);
|
||||
offset = ubf.push("d", CUniformBufferFormat::FloatVec4);
|
||||
nlassert(offset == 32);
|
||||
offset = ubf.push("e", CUniformBufferFormat::FloatVec2);
|
||||
nlassert(offset == 48);
|
||||
offset = ubf.push("g", CUniformBufferFormat::Float);
|
||||
nlassert(offset == 56);
|
||||
offset = ubf.push("h", CUniformBufferFormat::Float, 2);
|
||||
nlassert(offset == 64);
|
||||
offset = ubf.push("i", CUniformBufferFormat::FloatMat2x3);
|
||||
nlinfo("offset: %i", offset);
|
||||
nlassert(offset == 96);
|
||||
offset = ubf.push("j", CUniformBufferFormat::FloatVec3);
|
||||
nlassert(offset == 128);
|
||||
offset = ubf.push("k", CUniformBufferFormat::FloatVec2);
|
||||
nlassert(offset == 144);
|
||||
offset = ubf.push("l", CUniformBufferFormat::Float, 2);
|
||||
nlassert(offset == 160);
|
||||
offset = ubf.push("m", CUniformBufferFormat::FloatVec2);
|
||||
nlassert(offset == 192);
|
||||
offset = ubf.push("n", CUniformBufferFormat::FloatMat3, 2);
|
||||
nlassert(offset == 208);
|
||||
offset = ubf.push("o", CUniformBufferFormat::FloatVec3);
|
||||
nlassert(offset == 304);
|
||||
}
|
||||
|
||||
} /* namespace NL3D */
|
||||
|
||||
/* end of file */
|
||||
Loading…
Reference in New Issue