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More cleanup. Remove files that are not strictly required.

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This commit is contained in:
castano 2009-03-01 02:38:24 +00:00
parent 88fc5ca18e
commit 03c9ec0f62
26 changed files with 0 additions and 3939 deletions
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168
src/nvcore/BitArray.h
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@ -1,168 +0,0 @@
// This code is in the public domain -- castanyo@yahoo.es
#ifndef NV_CORE_BITARRAY_H
#define NV_CORE_BITARRAY_H
#include <nvcore/nvcore.h>
#include <nvcore/Containers.h>
namespace nv
{
/// Count the bits of @a x.
inline uint bitsSet(uint8 x) {
uint count = 0;
for(; x != 0; x >>= 1) {
count += (x & 1);
}
return count;
}
/// Count the bits of @a x.
inline uint bitsSet(uint32 x, int bits) {
uint count = 0;
for(; x != 0 && bits != 0; x >>= 1, bits--) {
count += (x & 1);
}
return count;
}
/// Simple bit array.
class BitArray
{
public:
/// Default ctor.
BitArray() {}
/// Ctor with initial m_size.
BitArray(uint sz)
{
resize(sz);
}
/// Get array m_size.
uint size() const { return m_size; }
/// Clear array m_size.
void clear() { resize(0); }
/// Set array m_size.
void resize(uint sz)
{
m_size = sz;
m_bitArray.resize( (m_size + 7) >> 3 );
}
/// Get bit.
bool bitAt(uint b) const
{
nvDebugCheck( b < m_size );
return (m_bitArray[b >> 3] & (1 << (b & 7))) != 0;
}
/// Set a bit.
void setBitAt(uint b)
{
nvDebugCheck( b < m_size );
m_bitArray[b >> 3] |= (1 << (b & 7));
}
/// Clear a bit.
void clearBitAt( uint b )
{
nvDebugCheck( b < m_size );
m_bitArray[b >> 3] &= ~(1 << (b & 7));
}
/// Clear all the bits.
void clearAll()
{
memset(m_bitArray.mutableBuffer(), 0, m_bitArray.size());
}
/// Set all the bits.
void setAll()
{
memset(m_bitArray.mutableBuffer(), 0xFF, m_bitArray.size());
}
/// Toggle all the bits.
void toggleAll()
{
const uint byte_num = m_bitArray.size();
for(uint b = 0; b < byte_num; b++) {
m_bitArray[b] ^= 0xFF;
}
}
/// Get a byte of the bit array.
const uint8 & byteAt(uint index) const
{
return m_bitArray[index];
}
/// Set the given byte of the byte array.
void setByteAt(uint index, uint8 b)
{
m_bitArray[index] = b;
}
/// Count the number of bits set.
uint countSetBits() const
{
const uint num = m_bitArray.size();
if( num == 0 ) {
return 0;
}
uint count = 0;
for(uint i = 0; i < num - 1; i++) {
count += bitsSet(m_bitArray[i]);
}
count += bitsSet(m_bitArray[num-1], m_size & 0x7);
//piDebugCheck(count + countClearBits() == m_size);
return count;
}
/// Count the number of bits clear.
uint countClearBits() const {
const uint num = m_bitArray.size();
if( num == 0 ) {
return 0;
}
uint count = 0;
for(uint i = 0; i < num - 1; i++) {
count += bitsSet(~m_bitArray[i]);
}
count += bitsSet(~m_bitArray[num-1], m_size & 0x7);
//piDebugCheck(count + countSetBits() == m_size);
return count;
}
friend void swap(BitArray & a, BitArray & b)
{
swap(a.m_size, b.m_size);
swap(a.m_bitArray, b.m_bitArray);
}
private:
/// Number of bits stored.
uint m_size;
/// Array of bits.
Array<uint8> m_bitArray;
};
} // nv namespace
#endif // _PI_CORE_BITARRAY_H_

37
src/nvcore/CMakeLists.txt
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@ -7,9 +7,6 @@ SET(CORE_SRCS
DefsGnucWin32.h
DefsVcWin32.h
Ptr.h
RefCounted.h
RefCounted.cpp
BitArray.h
Memory.h
Memory.cpp
Debug.h
@ -17,10 +14,6 @@ SET(CORE_SRCS
Containers.h
StrLib.h
StrLib.cpp
Radix.h
Radix.cpp
CpuInfo.h
CpuInfo.cpp
Algorithms.h
Timer.h
Library.h
@ -31,41 +24,11 @@ SET(CORE_SRCS
TextReader.cpp
TextWriter.h
TextWriter.cpp
Tokenizer.h
Tokenizer.cpp
FileSystem.h
FileSystem.cpp)
INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR})
# For Windows64 in MSVC we need to add the assembly version of vsscanf
IF(MSVC AND NV_SYSTEM_PROCESSOR STREQUAL "AMD64")
SET(VSSCANF_ASM_NAME "vsscanf_proxy_win64")
IF(MSVC_IDE)
# $(IntDir) is a macro expanded to the intermediate directory of the selected solution configuration
SET(VSSCANF_ASM_INTDIR "$(IntDir)")
ELSE(MSVC_IDE)
# For some reason the NMake generator doesn't work properly with the generated .obj source:
# it requires the absolute path. So this is a hack which worked as of cmake 2.6.0 patch 0
GET_FILENAME_COMPONENT(VSSCANF_ASM_INTDIR
"${nvcore_BINARY_DIR}/CMakeFiles/nvcore.dir" ABSOLUTE)
ENDIF(MSVC_IDE)
SET(VSSCANF_ASM_SRC "${CMAKE_CURRENT_SOURCE_DIR}/${VSSCANF_ASM_NAME}.masm")
SET(VSSCANF_ASM_OBJ "${VSSCANF_ASM_INTDIR}/${VSSCANF_ASM_NAME}.obj")
# Adds the assembly output to the sources and adds the custom command to generate it
SET(CORE_SRCS
${CORE_SRCS}
${VSSCANF_ASM_OBJ}
)
ADD_CUSTOM_COMMAND(OUTPUT ${VSSCANF_ASM_OBJ}
MAIN_DEPENDENCY ${VSSCANF_ASM_SRC}
COMMAND ml64
ARGS /nologo /Fo ${VSSCANF_ASM_OBJ} /c /Cx ${VSSCANF_ASM_SRC}
)
ENDIF(MSVC AND NV_SYSTEM_PROCESSOR STREQUAL "AMD64")
# targets
ADD_DEFINITIONS(-DNVCORE_EXPORTS)

59
src/nvcore/Constraints.h
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@ -1,59 +0,0 @@
// This code is in the public domain -- castanyo@yahoo.es
#ifndef NV_CORE_ALGORITHMS_H
#define NV_CORE_ALGORITHMS_H
#include <nvcore/nvcore.h>
namespace nv
{
// Cool constraints from "Imperfect C++"
// must_be_pod
template <typename T>
struct must_be_pod
{
static void constraints()
{
union { T T_is_not_POD_type; };
}
};
// must_be_pod_or_void
template <typename T>
struct must_be_pod_or_void
{
static void constraints()
{
union { T T_is_not_POD_type; };
}
};
template <> struct must_be_pod_or_void<void> {};
// size_of
template <typename T>
struct size_of
{
enum { value = sizeof(T) };
};
template <>
struct size_of<void>
{
enum { value = 0 };
};
// must_be_same_size
template <typename T1, typename T2>
struct must_be_same_size
{
static void constraints()
{
const int T1_not_same_size_as_T2 = size_of<T1>::value == size_of<T2>::value;
int i[T1_not_same_size_as_T2];
}
};
} // nv namespace
#endif // NV_CORE_ALGORITHMS_H

162
src/nvcore/CpuInfo.cpp
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@ -1,162 +0,0 @@
// This code is in the public domain -- castanyo@yahoo.es
#include <nvcore/CpuInfo.h>
#include <nvcore/Debug.h>
using namespace nv;
#if NV_OS_WIN32
#define _WIN32_WINNT 0x0501
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS) (HANDLE, PBOOL);
static bool isWow64()
{
LPFN_ISWOW64PROCESS fnIsWow64Process = (LPFN_ISWOW64PROCESS)GetProcAddress(GetModuleHandle(TEXT("kernel32")), "IsWow64Process");
BOOL bIsWow64 = FALSE;
if (NULL != fnIsWow64Process)
{
if (!fnIsWow64Process(GetCurrentProcess(), &bIsWow64))
{
return false;
}
}
return bIsWow64 == TRUE;
}
#endif // NV_OS_WIN32
#if NV_OS_LINUX
#include <string.h>
#include <sched.h>
#endif // NV_OS_LINUX
#if NV_OS_DARWIN
#include <sys/types.h>
#include <sys/sysctl.h>
#endif // NV_OS_DARWIN
// Initialize the data and the local defines, which are designed
// to match the positions in cpuid
uint CpuInfo::m_cpu = ~0x0;
uint CpuInfo::m_procCount = 0;
#define NV_CPUINFO_MMX_MASK (1<<23)
#define NV_CPUINFO_SSE_MASK (1<<25)
#define NV_CPUINFO_SSE2_MASK (1<<26)
#define NV_CPUINFO_SSE3_MASK (1)
uint CpuInfo::processorCount()
{
if (m_procCount == 0) {
#if NV_OS_WIN32
SYSTEM_INFO sysInfo;
typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS) (HANDLE, PBOOL);
if (isWow64())
{
GetNativeSystemInfo(&sysInfo);
}
else
{
GetSystemInfo(&sysInfo);
}
uint count = (uint)sysInfo.dwNumberOfProcessors;
m_procCount = count;
#elif NV_OS_LINUX
// Code from x264 (July 6 snapshot) cpu.c:271
uint bit;
uint np;
cpu_set_t p_aff;
memset( &p_aff, 0, sizeof(p_aff) );
sched_getaffinity( 0, sizeof(p_aff), &p_aff );
for( np = 0, bit = 0; bit < sizeof(p_aff); bit++ )
np += (((uint8 *)&p_aff)[bit / 8] >> (bit % 8)) & 1;
m_procCount = np;
#elif NV_OS_DARWIN
// Code from x264 (July 6 snapshot) cpu.c:286
uint numberOfCPUs;
size_t length = sizeof( numberOfCPUs );
if( sysctlbyname("hw.ncpu", &numberOfCPUs, &length, NULL, 0) )
{
numberOfCPUs = 1;
}
m_procCount = numberOfCPUs;
#else
m_procCount = 1;
#endif
}
nvDebugCheck(m_procCount > 0);
return m_procCount;
}
uint CpuInfo::coreCount()
{
return 1;
}
bool CpuInfo::hasMMX()
{
return (cpu() & NV_CPUINFO_MMX_MASK) != 0;
}
bool CpuInfo::hasSSE()
{
return (cpu() & NV_CPUINFO_SSE_MASK) != 0;
}
bool CpuInfo::hasSSE2()
{
return (cpu() & NV_CPUINFO_SSE2_MASK) != 0;
}
bool CpuInfo::hasSSE3()
{
return (cpu() & NV_CPUINFO_SSE3_MASK) != 0;
}
inline int CpuInfo::cpu() {
if (m_cpu == ~0x0) {
m_cpu = 0;
#if NV_CC_MSVC
int CPUInfo[4] = {-1};
__cpuid(CPUInfo, /*InfoType*/ 1);
if (CPUInfo[2] & NV_CPUINFO_SSE3_MASK) {
m_cpu |= NV_CPUINFO_SSE3_MASK;
}
if (CPUInfo[3] & NV_CPUINFO_MMX_MASK) {
m_cpu |= NV_CPUINFO_MMX_MASK;
}
if (CPUInfo[3] & NV_CPUINFO_SSE_MASK) {
m_cpu |= NV_CPUINFO_SSE_MASK;
}
if (CPUInfo[3] & NV_CPUINFO_SSE2_MASK) {
m_cpu |= NV_CPUINFO_SSE2_MASK;
}
#elif NV_CC_GNUC
// TODO: add the proper inline assembly
#if NV_CPU_X86
#elif NV_CPU_X86_64
#endif // NV_CPU_X86_64
#endif // NV_CC_GNUC
}
return m_cpu;
}

109
src/nvcore/CpuInfo.h
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@ -1,109 +0,0 @@
// This code is in the public domain -- castanyo@yahoo.es
#ifndef NV_CORE_CPUINFO_H
#define NV_CORE_CPUINFO_H
#include <nvcore/nvcore.h>
#if NV_CC_MSVC
#if _MSC_VER >= 1400
# include <intrin.h> // __rdtsc
#endif
#endif
namespace nv
{
// CPU Information.
class CpuInfo
{
protected:
static int cpu();
private:
// Cache of the CPU data
static uint m_cpu;
static uint m_procCount;
public:
static uint processorCount();
static uint coreCount();
static bool hasMMX();
static bool hasSSE();
static bool hasSSE2();
static bool hasSSE3();
};
#if NV_CC_MSVC
#if _MSC_VER < 1400
inline uint64 rdtsc()
{
uint64 t;
__asm rdtsc
__asm mov DWORD PTR [t], eax
__asm mov DWORD PTR [t+4], edx
return t;
}
#else
#pragma intrinsic(__rdtsc)
inline uint64 rdtsc()
{
return __rdtsc();
}
#endif
#endif
#if NV_CC_GNUC
#if defined(__i386__)
inline /*volatile*/ uint64 rdtsc()
{
uint64 x;
//__asm__ volatile ("rdtsc" : "=A" (x));
__asm__ volatile (".byte 0x0f, 0x31" : "=A" (x));
return x;
}
#elif defined(__x86_64__)
static __inline__ uint64 rdtsc(void)
{
unsigned int hi, lo;
__asm__ __volatile__ ("rdtsc" : "=a"(lo), "=d"(hi));
return ( (unsigned long long)lo)|( ((unsigned long long)hi)<<32 );
}
#elif defined(__powerpc__)
static __inline__ uint64 rdtsc(void)
{
uint64 result=0;
unsigned long int upper, lower, tmp;
__asm__ volatile(
"0: \n"
"\tmftbu %0 \n"
"\tmftb %1 \n"
"\tmftbu %2 \n"
"\tcmpw %2,%0 \n"
"\tbne 0b \n"
: "=r"(upper),"=r"(lower),"=r"(tmp)
);
result = upper;
result = result<<32;
result = result|lower;
return(result);
}
#endif
#endif // NV_CC_GNUC
} // nv namespace
#endif // NV_CORE_CPUINFO_H

30
src/nvcore/Prefetch.h
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@ -1,30 +0,0 @@
// This code is in the public domain -- castanyo@yahoo.es
#ifndef NV_CORE_PREFETCH_H
#define NV_CORE_PREFETCH_H
#include <nvcore/nvcore.h>
// nvPrefetch
#if NV_CC_GNUC
#define nvPrefetch(ptr) __builtin_prefetch(ptr)
#elif NV_CC_MSVC
// Uses SSE Intrinsics for both x86 and x86_64
#include <xmmintrin.h>
__forceinline void nvPrefetch(const void * mem)
{
_mm_prefetch(static_cast<const char*>(mem), _MM_HINT_T0); /* prefetcht0 */
// _mm_prefetch(static_cast<const char*>(mem), _MM_HINT_NTA); /* prefetchnta */
}
#else
// do nothing in other case.
#define nvPrefetch(ptr)
#endif // NV_CC_MSVC
#endif // NV_CORE_PREFETCH_H

484
src/nvcore/Radix.cpp
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@ -1,484 +0,0 @@
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* Contains source code from the article "Radix Sort Revisited".
* \file Radix.cpp
* \author Pierre Terdiman
* \date April, 4, 2000
*/
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// References:
// http://www.codercorner.com/RadixSortRevisited.htm
// http://www.stereopsis.com/radix.html
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* Revisited Radix Sort.
* This is my new radix routine:
* - it uses indices and doesn't recopy the values anymore, hence wasting less ram
* - it creates all the histograms in one run instead of four
* - it sorts words faster than dwords and bytes faster than words
* - it correctly sorts negative floating-point values by patching the offsets
* - it automatically takes advantage of temporal coherence
* - multiple keys support is a side effect of temporal coherence
* - it may be worth recoding in asm... (mainly to use FCOMI, FCMOV, etc) [it's probably memory-bound anyway]
*
* History:
* - 08.15.98: very first version
* - 04.04.00: recoded for the radix article
* - 12.xx.00: code lifting
* - 09.18.01: faster CHECK_PASS_VALIDITY thanks to Mark D. Shattuck (who provided other tips, not included here)
* - 10.11.01: added local ram support
* - 01.20.02: bugfix! In very particular cases the last pass was skipped in the float code-path, leading to incorrect sorting......
* - 01.02.02: - "mIndices" renamed => "mRanks". That's a rank sorter after all.
* - ranks are not "reset" anymore, but implicit on first calls
* - 07.05.02: offsets rewritten with one less indirection.
* - 11.03.02: "bool" replaced with RadixHint enum
* - 07.15.04: stack-based radix added
* - we want to use the radix sort but without making it static, and without allocating anything.
* - we internally allocate two arrays of ranks. Each of them has N uint32s to sort N values.
* - 1Mb/2/sizeof(uint32) = 131072 values max, at the same time.
* - 09.22.04: - adapted to MacOS by Chris Lamb
* - 01.12.06: - added optimizations suggested by Kyle Hubert
* - 04.06.08: - Fix bug negative zero sorting bug by Ignacio Castaño
*
* \class RadixSort
* \author Pierre Terdiman
* \version 1.5
* \date August, 15, 1998
*/
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Header
#include <nvcore/Radix.h>
#include <string.h> // memset
//using namespace IceCore;
#define INVALIDATE_RANKS mCurrentSize|=0x80000000
#define VALIDATE_RANKS mCurrentSize&=0x7fffffff
#define CURRENT_SIZE (mCurrentSize&0x7fffffff)
#define INVALID_RANKS (mCurrentSize&0x80000000)
#if NV_BIG_ENDIAN
#define H0_OFFSET 768
#define H1_OFFSET 512
#define H2_OFFSET 256
#define H3_OFFSET 0
#define BYTES_INC (3-j)
#else
#define H0_OFFSET 0
#define H1_OFFSET 256
#define H2_OFFSET 512
#define H3_OFFSET 768
#define BYTES_INC j
#endif
#define CREATE_HISTOGRAMS(type, buffer) \
/* Clear counters/histograms */ \
memset(mHistogram, 0, 256*4*sizeof(uint32)); \
\
/* Prepare to count */ \
const uint8* p = (const uint8*)input; \
const uint8* pe = &p[nb*4]; \
uint32* h0= &mHistogram[H0_OFFSET]; /* Histogram for first pass (LSB) */ \
uint32* h1= &mHistogram[H1_OFFSET]; /* Histogram for second pass */ \
uint32* h2= &mHistogram[H2_OFFSET]; /* Histogram for third pass */ \
uint32* h3= &mHistogram[H3_OFFSET]; /* Histogram for last pass (MSB) */ \
\
bool AlreadySorted = true; /* Optimism... */ \
\
if(INVALID_RANKS) \
{ \
/* Prepare for temporal coherence */ \
type* Running = (type*)buffer; \
type PrevVal = *Running; \
\
while(p!=pe) \
{ \
/* Read input buffer in previous sorted order */ \
type Val = *Running++; \
/* Check whether already sorted or not */ \
if(Val<PrevVal) { AlreadySorted = false; break; } /* Early out */ \
/* Update for next iteration */ \
PrevVal = Val; \
\
/* Create histograms */ \
h0[*p++]++; h1[*p++]++; h2[*p++]++; h3[*p++]++; \
} \
\
/* If all input values are already sorted, we just have to return and leave the */ \
/* previous list unchanged. That way the routine may take advantage of temporal */ \
/* coherence, for example when used to sort transparent faces. */ \
if(AlreadySorted) \
{ \
mNbHits++; \
for(uint32 i=0;i<nb;i++) mRanks[i] = i; \
return *this; \
} \
} \
else \
{ \
/* Prepare for temporal coherence */ \
const uint32* Indices = mRanks; \
type PrevVal = (type)buffer[*Indices]; \
\
while(p!=pe) \
{ \
/* Read input buffer in previous sorted order */ \
type Val = (type)buffer[*Indices++]; \
/* Check whether already sorted or not */ \
if(Val<PrevVal) { AlreadySorted = false; break; } /* Early out */ \
/* Update for next iteration */ \
PrevVal = Val; \
\
/* Create histograms */ \
h0[*p++]++; h1[*p++]++; h2[*p++]++; h3[*p++]++; \
} \
\
/* If all input values are already sorted, we just have to return and leave the */ \
/* previous list unchanged. That way the routine may take advantage of temporal */ \
/* coherence, for example when used to sort transparent faces. */ \
if(AlreadySorted) { mNbHits++; return *this; } \
} \
\
/* Else there has been an early out and we must finish computing the histograms */ \
while(p!=pe) \
{ \
/* Create histograms without the previous overhead */ \
h0[*p++]++; h1[*p++]++; h2[*p++]++; h3[*p++]++; \
}
#define CHECK_PASS_VALIDITY(pass) \
/* Shortcut to current counters */ \
const uint32* CurCount = &mHistogram[pass<<8]; \
\
/* Reset flag. The sorting pass is supposed to be performed. (default) */ \
bool PerformPass = true; \
\
/* Check pass validity */ \
\
/* If all values have the same byte, sorting is useless. */ \
/* It may happen when sorting bytes or words instead of dwords. */ \
/* This routine actually sorts words faster than dwords, and bytes */ \
/* faster than words. Standard running time (O(4*n))is reduced to O(2*n) */ \
/* for words and O(n) for bytes. Running time for floats depends on actual values... */ \
\
/* Get first byte */ \
uint8 UniqueVal = *(((uint8*)input)+pass); \
\
/* Check that byte's counter */ \
if(CurCount[UniqueVal]==nb) PerformPass=false;
using namespace nv;
/// Constructor.
RadixSort::RadixSort() : mRanks(NULL), mRanks2(NULL), mCurrentSize(0), mTotalCalls(0), mNbHits(0), mDeleteRanks(true)
{
// Initialize indices
INVALIDATE_RANKS;
}
/// Destructor.
RadixSort::~RadixSort()
{
// Release everything
if(mDeleteRanks)
{
delete [] mRanks2;
delete [] mRanks;
}
}
/// Resizes the inner lists.
/// \param nb [in] new size (number of dwords)
/// \return true if success
bool RadixSort::resize(uint32 nb)
{
if(mDeleteRanks)
{
// Free previously used ram
delete [] mRanks2;
delete [] mRanks;
// Get some fresh one
mRanks = new uint32[nb];
mRanks2 = new uint32[nb];
}
return true;
}
inline void RadixSort::checkResize(uint32 nb)
{
uint32 CurSize = CURRENT_SIZE;
if(nb!=CurSize)
{
if(nb>CurSize) resize(nb);
mCurrentSize = nb;
INVALIDATE_RANKS;
}
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* Main sort routine.
* This one is for integer values. After the call, mIndices contains a list of indices in sorted order, i.e. in the order you may process your data.
* \param input [in] a list of integer values to sort
* \param nb [in] number of values to sort
* \param signedvalues [in] true to handle negative values, false if you know your input buffer only contains positive values
* \return Self-Reference
*/
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
RadixSort& RadixSort::sort(const uint32* input, uint32 nb, bool signedValues/*=true*/)
{
// Checkings
if(!input || !nb || nb&0x80000000) return *this;
// Stats
mTotalCalls++;
// Resize lists if needed
checkResize(nb);
// Allocate histograms & offsets on the stack
uint32 mHistogram[256*4];
uint32* mLink[256];
// Create histograms (counters). Counters for all passes are created in one run.
// Pros: read input buffer once instead of four times
// Cons: mHistogram is 4Kb instead of 1Kb
// We must take care of signed/unsigned values for temporal coherence.... I just
// have 2 code paths even if just a single opcode changes. Self-modifying code, someone?
if(!signedValues) { CREATE_HISTOGRAMS(uint32, input); }
else { CREATE_HISTOGRAMS(int32, input); }
// Radix sort, j is the pass number (0=LSB, 3=MSB)
for(uint32 j=0;j<4;j++)
{
CHECK_PASS_VALIDITY(j);
// Sometimes the fourth (negative) pass is skipped because all numbers are negative and the MSB is 0xFF (for example). This is
// not a problem, numbers are correctly sorted anyway.
if(PerformPass)
{
// Should we care about negative values?
if(j!=3 || !signedValues)
{
// Here we deal with positive values only
// Create offsets
mLink[0] = mRanks2;
for(uint32 i=1;i<256;i++) mLink[i] = mLink[i-1] + CurCount[i-1];
}
else
{
// This is a special case to correctly handle negative integers. They're sorted in the right order but at the wrong place.
mLink[128] = mRanks2;
for(uint32 i=129;i<256;i++) mLink[i] = mLink[i-1] + CurCount[i-1];
mLink[0] = mLink[255] + CurCount[255];
for(uint32 i=1;i<128;i++) mLink[i] = mLink[i-1] + CurCount[i-1];
}
// Perform Radix Sort
const uint8* InputBytes = (const uint8*)input;
InputBytes += BYTES_INC;
if(INVALID_RANKS)
{
for(uint32 i=0;i<nb;i++) *mLink[InputBytes[i<<2]]++ = i;
VALIDATE_RANKS;
}
else
{
const uint32* Indices = mRanks;
const uint32* IndicesEnd = &mRanks[nb];
while(Indices!=IndicesEnd)
{
uint32 id = *Indices++;
*mLink[InputBytes[id<<2]]++ = id;
}
}
// Swap pointers for next pass. Valid indices - the most recent ones - are in mRanks after the swap.
uint32* Tmp = mRanks;
mRanks = mRanks2;
mRanks2 = Tmp;
}
}
return *this;
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* Main sort routine.
* This one is for floating-point values. After the call, mIndices contains a list of indices in sorted order, i.e. in the order you may process your data.
* \param input [in] a list of floating-point values to sort
* \param nb [in] number of values to sort
* \return Self-Reference
* \warning only sorts IEEE floating-point values
*/
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
RadixSort& RadixSort::sort(const float* input2, uint32 nb)
{
// Checkings
if(!input2 || !nb || nb&0x80000000) return *this;
// Stats
mTotalCalls++;
const uint32* input = (const uint32*)input2;
// Resize lists if needed
checkResize(nb);
// Allocate histograms & offsets on the stack
uint32 mHistogram[256*4];
uint32* mLink[256];
// Create histograms (counters). Counters for all passes are created in one run.
// Pros: read input buffer once instead of four times
// Cons: mHistogram is 4Kb instead of 1Kb
// Floating-point values are always supposed to be signed values, so there's only one code path there.
// Please note the floating point comparison needed for temporal coherence! Although the resulting asm code
// is dreadful, this is surprisingly not such a performance hit - well, I suppose that's a big one on first
// generation Pentiums....We can't make comparison on integer representations because, as Chris said, it just
// wouldn't work with mixed positive/negative values....
{ CREATE_HISTOGRAMS(float, input2); }
// Radix sort, j is the pass number (0=LSB, 3=MSB)
for(uint32 j=0;j<4;j++)
{
// Should we care about negative values?
if(j!=3)
{
// Here we deal with positive values only
CHECK_PASS_VALIDITY(j);
if(PerformPass)
{
// Create offsets
mLink[0] = mRanks2;
for(uint32 i=1;i<256;i++) mLink[i] = mLink[i-1] + CurCount[i-1];
// Perform Radix Sort
const uint8* InputBytes = (const uint8*)input;
InputBytes += BYTES_INC;
if(INVALID_RANKS)
{
for(uint32 i=0;i<nb;i++) *mLink[InputBytes[i<<2]]++ = i;
VALIDATE_RANKS;
}
else
{
const uint32* Indices = mRanks;
const uint32* IndicesEnd = &mRanks[nb];
while(Indices!=IndicesEnd)
{
uint32 id = *Indices++;
*mLink[InputBytes[id<<2]]++ = id;
}
}
// Swap pointers for next pass. Valid indices - the most recent ones - are in mRanks after the swap.
uint32* Tmp = mRanks;
mRanks = mRanks2;
mRanks2 = Tmp;
}
}
else
{
// This is a special case to correctly handle negative values
CHECK_PASS_VALIDITY(j);
if(PerformPass)
{
mLink[255] = mRanks2 + CurCount[255];
for(uint32 i = 254; i > 126; i--) mLink[i] = mLink[i+1] + CurCount[i];
mLink[0] = mLink[127] + CurCount[127];
for(uint32 i = 1; i < 127; i++) mLink[i] = mLink[i-1] + CurCount[i-1];
// Perform Radix Sort
if(INVALID_RANKS)
{
for(uint32 i=0;i<nb;i++)
{
uint32 Radix = input[i]>>24; // Radix byte, same as above. AND is useless here (uint32).
// ### cmp to be killed. Not good. Later.
if(Radix<128) *mLink[Radix]++ = i; // Number is positive, same as above
else *(--mLink[Radix]) = i; // Number is negative, flip the sorting order
}
VALIDATE_RANKS;
}
else
{
for(uint32 i=0;i<nb;i++)
{
uint32 Radix = input[mRanks[i]]>>24; // Radix byte, same as above. AND is useless here (uint32).
// ### cmp to be killed. Not good. Later.
if(Radix<128) *mLink[Radix]++ = mRanks[i]; // Number is positive, same as above
else *(--mLink[Radix]) = mRanks[i]; // Number is negative, flip the sorting order
}
}
// Swap pointers for next pass. Valid indices - the most recent ones - are in mRanks after the swap.
uint32* Tmp = mRanks;
mRanks = mRanks2;
mRanks2 = Tmp;
}
else
{
// The pass is useless, yet we still have to reverse the order of current list if all values are negative.
if(UniqueVal>=128)
{
if(INVALID_RANKS)
{
// ###Possible?
for(uint32 i=0;i<nb;i++) mRanks2[i] = nb-i-1;
VALIDATE_RANKS;
}
else
{
for(uint32 i=0;i<nb;i++) mRanks2[i] = mRanks[nb-i-1];
}
// Swap pointers for next pass. Valid indices - the most recent ones - are in mRanks after the swap.
uint32* Tmp = mRanks;
mRanks = mRanks2;
mRanks2 = Tmp;
}
}
}
}
return *this;
}
bool RadixSort::setRankBuffers(uint32* ranks0, uint32* ranks1)
{
if(!ranks0 || !ranks1) return false;
mRanks = ranks0;
mRanks2 = ranks1;
mDeleteRanks = false;
return true;
}
RadixSort & RadixSort::sort(const Array<int> & input)
{
return sort((const uint32 *)input.buffer(), input.count(), true);
}
RadixSort & RadixSort::sort(const Array<uint> & input)
{
return sort(input.buffer(), input.count(), false);
}
RadixSort & RadixSort::sort(const Array<float> & input)
{
return sort(input.buffer(), input.count());
}

73
src/nvcore/Radix.h
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@ -1,73 +0,0 @@
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* Contains source code from the article "Radix Sort Revisited".
* \file Radix.h
* \author Pierre Terdiman
* \date April, 4, 2000
*/
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Include Guard
#ifndef NV_CORE_RADIXSORT_H
#define NV_CORE_RADIXSORT_H
#include <nvcore/nvcore.h>
#include <nvcore/Containers.h>
namespace nv
{
class NVCORE_CLASS RadixSort
{
NV_FORBID_COPY(RadixSort);
public:
// Constructor/Destructor
RadixSort();
~RadixSort();
// Sorting methods
RadixSort & sort(const uint32* input, uint32 nb, bool signedValues=true);
RadixSort & sort(const float* input, uint32 nb);
// Helpers
RadixSort & sort(const Array<int> & input);
RadixSort & sort(const Array<uint> & input);
RadixSort & sort(const Array<float> & input);
//! Access to results. mRanks is a list of indices in sorted order, i.e. in the order you may further process your data
inline /*const*/ uint32 * ranks() /*const*/ { return mRanks; }
//! mIndices2 gets trashed on calling the sort routine, but otherwise you can recycle it the way you want.
inline uint32 * recyclable() const { return mRanks2; }
// Stats
//! Returns the total number of calls to the radix sorter.
inline uint32 totalCalls() const { return mTotalCalls; }
//! Returns the number of early exits due to temporal coherence.
inline uint32 hits() const { return mNbHits; }
bool setRankBuffers(uint32* ranks0, uint32* ranks1);
private:
uint32 mCurrentSize; //!< Current size of the indices list
uint32 * mRanks; //!< Two lists, swapped each pass
uint32 * mRanks2;
// Stats
uint32 mTotalCalls; //!< Total number of calls to the sort routine
uint32 mNbHits; //!< Number of early exits due to coherence
// Stack-radix
bool mDeleteRanks; //!<
// Internal methods
void checkResize(uint32 nb);
bool resize(uint32 nb);
};
} // nv namespace
#endif // NV_CORE_RADIXSORT_H

9
src/nvcore/RefCounted.cpp
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@ -1,9 +0,0 @@
// This code is in the public domain -- castanyo@yahoo.es
#include "RefCounted.h"
using namespace nv;
int nv::RefCounted::s_total_ref_count = 0;
int nv::RefCounted::s_total_obj_count = 0;

119
src/nvcore/RefCounted.h
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@ -1,119 +0,0 @@
// This code is in the public domain -- castanyo@yahoo.es
#ifndef NV_CORE_REFCOUNTED_H
#define NV_CORE_REFCOUNTED_H
#include <nvcore/nvcore.h>
#include <nvcore/Debug.h>
#define NV_DECLARE_PTR(Class) \
template <class T> class SmartPtr; \
typedef SmartPtr<class Class> Class ## Ptr; \
typedef SmartPtr<const class Class> Class ## ConstPtr
namespace nv
{
/// Reference counted base class to be used with SmartPtr and WeakPtr.
class RefCounted
{
NV_FORBID_COPY(RefCounted);
public:
/// Ctor.
RefCounted() : m_count(0)/*, m_weak_proxy(NULL)*/
{
s_total_obj_count++;
}
/// Virtual dtor.
virtual ~RefCounted()
{
nvCheck( m_count == 0 );
nvCheck( s_total_obj_count > 0 );
s_total_obj_count--;
}
/// Increase reference count.
uint addRef() const
{
s_total_ref_count++;
m_count++;
return m_count;
}
/// Decrease reference count and remove when 0.
uint release() const
{
nvCheck( m_count > 0 );
s_total_ref_count--;
m_count--;
if( m_count == 0 ) {
// releaseWeakProxy();
delete this;
return 0;
}
return m_count;
}
/*
/// Get weak proxy.
WeakProxy * getWeakProxy() const
{
if (m_weak_proxy == NULL) {
m_weak_proxy = new WeakProxy;
m_weak_proxy->AddRef();
}
return m_weak_proxy;
}
/// Release the weak proxy.
void releaseWeakProxy() const
{
if (m_weak_proxy != NULL) {
m_weak_proxy->NotifyObjectDied();
m_weak_proxy->Release();
m_weak_proxy = NULL;
}
}
*/
/** @name Debug methods: */
//@{
/// Get reference count.
int refCount() const
{
return m_count;
}
/// Get total number of objects.
static int totalObjectCount()
{
return s_total_obj_count;
}
/// Get total number of references.
static int totalReferenceCount()
{
return s_total_ref_count;
}
//@}
private:
NVCORE_API static int s_total_ref_count;
NVCORE_API static int s_total_obj_count;
mutable int m_count;
// mutable WeakProxy * weak_proxy;
};
} // nv namespace
#endif // NV_CORE_REFCOUNTED_H

259
src/nvcore/Tokenizer.cpp
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@ -1,259 +0,0 @@
// This code is in the public domain -- castano@gmail.com
#include "Tokenizer.h"
#include <nvcore/StrLib.h>
#include <stdio.h> // vsscanf
#include <stdarg.h> // va_list
#include <stdlib.h> // atof, atoi
#if NV_CC_MSVC
#if defined NV_CPU_X86
/* vsscanf for Win32
* Written 5/2003 by <mgix@mgix.com>
* This code is in the Public Domain
*/
#include <malloc.h> // alloca
//#include <string.h>
static int vsscanf(const char * buffer, const char * format, va_list argPtr)
{
// Get an upper bound for the # of args
size_t count = 0;
const char *p = format;
while(1) {
char c = *(p++);
if(c==0) break;
if(c=='%' && (p[0]!='*' && p[0]!='%')) ++count;
}
// Make a local stack
size_t stackSize = (2+count)*sizeof(void*);
void **newStack = (void**)alloca(stackSize);
// Fill local stack the way sscanf likes it
newStack[0] = (void*)buffer;
newStack[1] = (void*)format;
memcpy(newStack+2, argPtr, count*sizeof(void*));
// @@ Use: CALL DWORD PTR [sscanf]
// Warp into system sscanf with new stack
int result;
void *savedESP;
__asm
{
mov savedESP, esp
mov esp, newStack
#if _MSC_VER >= 1400
call DWORD PTR [sscanf_s]
#else
call DWORD PTR [sscanf]
#endif
mov esp, savedESP
mov result, eax
}
return result;
}
#elif defined NV_CPU_X86_64
/* Prototype of the helper assembly function */
#ifdef __cplusplus
extern "C" {
#endif
int vsscanf_proxy_win64(const char * buffer, const char * format, va_list argPtr, __int64 count);
#ifdef __cplusplus
}
#endif
/* MASM64 version of the above vsscanf */
static int vsscanf(const char * buffer, const char * format, va_list argPtr)
{
// Get an upper bound for the # of args
__int64 count = 0;
const char *p = format;
while(1) {
char c = *(p++);
if(c==0) break;
if(c=='%' && (p[0]!='*' && p[0]!='%')) ++count;
}
return vsscanf_proxy_win64(buffer, format, argPtr, count);
}
/*#error vsscanf doesn't work on MSVC for x64*/
#else
#error Unknown processor for MSVC
#endif
#endif // NV_CC_MSVC
using namespace nv;
Token::Token() :
m_str(""), m_len(0)
{
}
Token::Token(const Token & token) :
m_str(token.m_str), m_len(token.m_len)
{
}
Token::Token(const char * str, int len) :
m_str(str), m_len(len)
{
}
bool Token::operator==(const char * str) const
{
return strncmp(m_str, str, m_len) == 0;
}
bool Token::operator!=(const char * str) const
{
return strncmp(m_str, str, m_len) != 0;
}
bool Token::isNull()
{
return m_len != 0;
}
float Token::toFloat() const
{
return float(atof(m_str));
}
int Token::toInt() const
{
return atoi(m_str);
}
uint Token::toUnsignedInt() const
{
// @@ TBD
return uint(atoi(m_str));
}
String Token::toString() const
{
return String(m_str, m_len);
}
bool Token::parse(const char * format, int count, ...) const
{
va_list arg;
va_start(arg, count);
int readCount = vsscanf(m_str, format, arg);
va_end(arg);
return readCount == count;
}
Tokenizer::Tokenizer(Stream * stream) :
m_reader(stream), m_lineNumber(0), m_columnNumber(0), m_delimiters("{}()="), m_spaces(" \t")
{
}
bool Tokenizer::nextLine(bool skipEmptyLines /*= true*/)
{
do {
if (!readLine()) {
return false;
}
}
while (!readToken() && skipEmptyLines);
return true;
}
bool Tokenizer::nextToken(bool skipEndOfLine /*= false*/)
{
if (!readToken()) {
if (!skipEndOfLine) {
return false;
}
else {
return nextLine(true);
}
}
return true;
}
bool Tokenizer::readToken()
{
skipSpaces();
const char * begin = m_line + m_columnNumber;
if (*begin == '\0') {
return false;
}
char c = readChar();
if (isDelimiter(c)) {
m_token = Token(begin, 1);
return true;
}
// @@ Add support for quoted tokens "", ''
int len = 0;
while (!isDelimiter(c) && !isSpace(c) && c != '\0') {
c = readChar();
len++;
}
m_columnNumber--;
m_token = Token(begin, len);
return true;
}
char Tokenizer::readChar()
{
return m_line[m_columnNumber++];
}
bool Tokenizer::readLine()
{
m_lineNumber++;
m_columnNumber = 0;
m_line = m_reader.readLine();
return m_line != NULL;
}
void Tokenizer::skipSpaces()
{
while (isSpace(readChar())) {}
m_columnNumber--;
}
bool Tokenizer::isSpace(char c)
{
uint i = 0;
while (m_spaces[i] != '\0') {
if (c == m_spaces[i]) {
return true;
}
i++;
}
return false;
}
bool Tokenizer::isDelimiter(char c)
{
uint i = 0;
while (m_delimiters[i] != '\0') {
if (c == m_delimiters[i]) {
return true;
}
i++;
}
return false;
}

98
src/nvcore/Tokenizer.h
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@ -1,98 +0,0 @@
// This code is in the public domain -- castano@gmail.com
#ifndef NV_CORE_TOKENIZER_H
#define NV_CORE_TOKENIZER_H
#include <nvcore/StrLib.h>
#include <nvcore/Stream.h>
#include <nvcore/TextReader.h>
namespace nv
{
/// A token produced by the Tokenizer.
class NVCORE_CLASS Token
{
public:
Token();
Token(const Token & token);
Token(const char * str, int len);
bool operator==(const char * str) const;
bool operator!=(const char * str) const;
bool isNull();
float toFloat() const;
int toInt() const;
uint toUnsignedInt() const;
String toString() const;
bool parse(const char * format, int count, ...) const __attribute__((format (scanf, 2, 4)));
private:
const char * m_str;
int m_len;
};
/// Exception thrown by the tokenizer.
class TokenizerException
{
public:
TokenizerException(int line, int column) : m_line(line), m_column(column) {}
int line() const { return m_line; }
int column() const { return m_column; }
private:
int m_line;
int m_column;
};
// @@ Use enums instead of bools for clarity!
//enum SkipEmptyLines { skipEmptyLines, noSkipEmptyLines };
//enum SkipEndOfLine { skipEndOfLine, noSkipEndOfLine };
/// A simple stream tokenizer.
class NVCORE_CLASS Tokenizer
{
public:
Tokenizer(Stream * stream);
bool nextLine(bool skipEmptyLines = true);
bool nextToken(bool skipEndOfLine = false);
const Token & token() const { return m_token; }
int lineNumber() const { return m_lineNumber; }
int columnNumber() const { return m_columnNumber; }
void setDelimiters(const char * str) { m_delimiters = str; }
const char * delimiters() const { return m_delimiters; }
void setSpaces(const char * str) { m_spaces = str; }
const char * spaces() const { return m_spaces; }
private:
char readChar();
bool readLine();
bool readToken();
void skipSpaces();
bool isSpace(char c);
bool isDelimiter(char c);
private:
TextReader m_reader;
const char * m_line;
Token m_token;
int m_lineNumber;
int m_columnNumber;
const char * m_delimiters;
const char * m_spaces;
};
} // nv namespace
#endif // NV_CORE_TOKENIZER_H

124
src/nvcore/vsscanf_proxy_win64.masm
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@ -1,124 +0,0 @@
; MASM x64 version of
; vsscanf for Win32
; originally written 5/2003 by <mgix@mgix.com>
;
; This was done because MSVC does not accept inline assembly code
; for the x64 platform, so this file implements almost the whole
; module in assembly using the amd64 ABI
;
; 06/17/2008 by edgarv [at] nvidia com
; Definition of memcpy
memcpy PROTO dest:Ptr, src:Ptr, numbytes:QWORD
; Definition of sscanf
sscanf PROTO buffer:Ptr Byte, format:Ptr Byte, args:VARARG
; Start a code segment named "_TEXT" by default
.CODE
; Entry point of our function: at this point we can use
; named parameters
ALIGN 16
PUBLIC vsscanf_proxy_win64
; Because the x64 code uses the fast call convention, only
; the arguments beyond the 4th one are available from the stack.
; The first four parameters are in RCX, RDX, R8 and R9
; Parameters:
; const char* buffer
; const char* format
; va_list argPtr
; size_t count
vsscanf_proxy_win64 PROC, \
buffer:PTR Byte, format:PTR Byte, argPtr:PTR, count:QWORD
; Allocates space for our local variable, savedRDP
sub rsp, 08h
; Copies the parameters from the registers to the memory: before warping to
; sscanf we will call memcpy, and those registers can just dissapear!
mov buffer, rcx
mov format, rdx
mov argPtr, r8
mov count, r9
; Allocate extra space in the stack for (2+count)*sizeof(void*),
; this is (2+count)*(8)
mov r10, r9
add r10, 2 ; count += 2
sal r10, 3 ; count *= 8
add r10, 0fh ; To force alignment to 16bytes
and r10, 0fffffffffffffff0h
sub rsp, r10 ; Actual stack allocation
; Continues by copying all the arguments in the "alloca" space
mov [rsp], rcx ; newStack[0] = (void*)buffer;
mov [rsp + 08h], rdx ; newStack[1] = (void*)format;
; Calls memcpy(newStack+2, argPtr, count*sizeof(void*));
mov rcx, rsp
add rcx, 010h ; newStack+2
mov rdx, r8 ; argPtr
mov r8, r9
sal r8, 3 ; count*sizeof(void*)
; Prepares extra stack space as required by the ABI for 4 arguments, and calls memcpy
sub rsp, 020h
call memcpy
; Restore the stack
add rsp, 020h
; Saves rsp in memory
mov qword ptr [rbp - 8], rsp
; Does exactly the same trick as before: warp into system sscanf with the new stack,
; but this time we also setup the arguments in the registers according to the amd64 ABI
; If there was at least one argument (after buffer and format), we need to copy that
; to r8, and if there was a second one we must copy that to r9
; (the first arguments to sscanf are always the buffer and the format)
mov r10, count
; Copy the first argument to r8 (if it exists)
cmp r10, 0
je args_memcpy
mov r8, [rsp + 10h]
; Copy the second argument to r9 (if it exists)
cmp r10, 1
je args_memcpy
mov r9, [rsp + 18h]
args_memcpy:
; Copies the buffer and format to rcx and rdx
mov rdx, [rsp + 08h]
mov rcx, [rsp]
; Finally, calls sscanf using the current stack
call sscanf
; At this point the return value is alreay in rax
; Restores rsp
mov rsp, qword ptr [rbp - 8]
; Undoes the alloca
add rsp, r10
; Restores the space for local variables
add rsp, 08h
; Remember, the return value is already in rax since the sscanf call
ret
vsscanf_proxy_win64 ENDP
END

3
src/nvimage/CMakeLists.txt
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@ -14,15 +14,12 @@ SET(IMAGE_SRCS
ColorBlock.cpp
BlockDXT.h
BlockDXT.cpp
HoleFilling.h
HoleFilling.cpp
DirectDrawSurface.h
DirectDrawSurface.cpp
Quantize.h
Quantize.cpp
NormalMap.h
NormalMap.cpp
NormalMipmap.h
PsdFile.h
TgaFile.h
ColorSpace.h

122
src/nvimage/ConeMap.cpp
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@ -1,122 +0,0 @@
// Copyright NVIDIA Corporation 2007 -- Ignacio Castano <icastano@nvidia.com>
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#include <nvcore/Ptr.h>
#include <nvmath/Color.h>
#include <nvimage/NormalMap.h>
#include <nvimage/Filter.h>
#include <nvimage/FloatImage.h>
#include <nvimage/Image.h>
using namespace nv;
static float processPixel(const FloatImage * img, uint x, uint y)
{
nvDebugCheck(img != NULL);
const uint w = img->width();
const uint h = img->height();
float d = img->pixel(x, y, 0);
float fx0 = (float) x / w;
float fy0 = (float) y / h;
float best_ratio = INF;
uint best_x = w;
uint best_y = h;
for (uint yy = 0; yy < h; yy++)
{
for (uint xx = 0; xx < w; xx++)
{
float ch = d - img->pixel(xx, yy, 0);
if (ch > 0)
{
float dx = float(xx - x);
float dy = float(yy - y);
float ratio = (dx * dx + dy * dy) / ch;
if (ratio < best_ratio)
{
best_x = xx;
best_y = yy;
}
}
}
}
if (best_x != w)
{
nvDebugCheck(best_y !=h);
float dx = float(best_x - x) / w;
float dy = float(best_y - y) / h;
float cw = sqrtf(dx*dx + dy*dy);
float ch = d - img->pixel(xx, yy, 0);
return min(1, sqrtf(cw / ch));
}
return 1;
}
// Create cone map using the given kernels.
FloatImage * createConeMap(const Image * img, Vector4::Arg heightWeights)
{
nvCheck(img != NULL);
const uint w = img->width();
const uint h = img->height();
AutoPtr<FloatImage> fimage(new FloatImage());
//fimage->allocate(2, w, h);
fimage->allocate(4, w, h);
// Compute height and store in red channel:
float * heightChannel = fimage->channel(0);
for(uint i = 0; i < w*h; i++)
{
Vector4 color = toVector4(img->pixel(i));
heightChannel[i] = dot(color, heightWeights);
}
// Compute cones:
for(uint y = 0; y < h; y++)
{
for(uint x = 0; x < w; x++)
{
processPixel(fimage, x, y);
}
}
return fimage.release();
}

39
src/nvimage/ConeMap.h
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@ -1,39 +0,0 @@
// Copyright NVIDIA Corporation 2007 -- Ignacio Castano <icastano@nvidia.com>
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#ifndef NV_IMAGE_CONEMAP_H
#define NV_IMAGE_CONEMAP_H
#include <nvmath/Vector.h>
#include <nvimage/nvimage.h>
namespace nv
{
class Image;
class FloatImage;
FloatImage * createConeMap(const Image * img, Vector4::Arg heightWeights);
} // nv namespace
#endif // NV_IMAGE_CONEMAP_H

849
src/nvimage/HoleFilling.cpp
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@ -1,849 +0,0 @@
// This code is in the public domain -- castanyo@yahoo.es
#include <nvimage/HoleFilling.h>
#include <nvimage/FloatImage.h>
#include <nvmath/nvmath.h>
#include <nvcore/Containers.h>
#include <nvcore/Ptr.h>
using namespace nv;
float BitMap::sampleLinearClamp(float x, float y) const
{
const float fracX = x - floor(x);
const float fracY = y - floor(y);
const uint ix0 = ::clamp(uint(floor(x)), 0U, m_width-1);
const uint iy0 = ::clamp(uint(floor(y)), 0U, m_height-1);
const uint ix1 = ::clamp(uint(floor(x))+1, 0U, m_width-1);
const uint iy1 = ::clamp(uint(floor(y))+1, 0U, m_height-1);
float f1 = bitAt(ix0, iy0);
float f2 = bitAt(ix1, iy0);
float f3 = bitAt(ix0, iy1);
float f4 = bitAt(ix1, iy1);
float i1 = lerp(f1, f2, fracX);
float i2 = lerp(f3, f4, fracX);
return lerp(i1, i2, fracY);
}
// This is a variation of Sapiro's inpainting method.
void nv::fillExtrapolate(int passCount, FloatImage * img, BitMap * bmap)
{
nvCheck(img != NULL);
nvCheck(bmap != NULL);
const int w = img->width();
const int h = img->height();
const int count = img->componentNum();
nvCheck(bmap->width() == uint(w));
nvCheck(bmap->height() == uint(h));
AutoPtr<BitMap> newbmap(new BitMap(w, h));
newbmap->clearAll();
for(int p = 0; p < passCount; p++)
{
for(int c = 0; c < count; c++)
{
float * channel = img->channel(c);
for(int y = 0; y < h; y++) {
for(int x = 0; x < w; x++) {
if (bmap->bitAt(x, y)) {
// Not a hole.
newbmap->setBitAt(x, y);
continue;
}
const bool west = bmap->bitAt(img->indexClamp(x-1, y));
const bool east = bmap->bitAt(img->indexClamp(x+1, y));
const bool north = bmap->bitAt(img->indexClamp(x, y-1));
const bool south = bmap->bitAt(img->indexClamp(x, y+1));
const bool northwest = bmap->bitAt(img->indexClamp(x-1, y-1));
const bool northeast = bmap->bitAt(img->indexClamp(x+1, y-1));
const bool southwest = bmap->bitAt(img->indexClamp(x-1, y+1));
const bool southeast = bmap->bitAt(img->indexClamp(x+1, y+1));
int num = west + east + north + south + northwest + northeast + southwest + southeast;
if (num != 0) {
float average = 0.0f;
if (num == 3 && west && northwest && southwest) {
average = channel[img->indexClamp(x-1, y)];
}
else if (num == 3 && east && northeast && southeast) {
average = channel[img->indexClamp(x+1, y)];
}
else if (num == 3 && north && northwest && northeast) {
average = channel[img->indexClamp(x, y-1)];
}
else if (num == 3 && south && southwest && southeast) {
average = channel[img->indexClamp(x, y+1)];
}
else {
float total = 0.0f;
if (west) { average += 1 * channel[img->indexClamp(x-1, y)]; total += 1; }
if (east) { average += 1 * channel[img->indexClamp(x+1, y)]; total += 1; }
if (north) { average += 1 * channel[img->indexClamp(x, y-1)]; total += 1; }
if (south) { average += 1 * channel[img->indexClamp(x, y+1)]; total += 1; }
if (northwest) { average += channel[img->indexClamp(x-1, y-1)]; ++total; }
if (northeast) { average += channel[img->indexClamp(x+1, y-1)]; ++total; }
if (southwest) { average += channel[img->indexClamp(x-1, y+1)]; ++total; }
if (southeast) { average += channel[img->indexClamp(x+1, y+1)]; ++total; }
average /= total;
}
channel[img->indexClamp(x, y)] = average;
newbmap->setBitAt(x, y);
}
}
}
}
// Update the bit mask.
swap(*newbmap, *bmap);
}
}
namespace {
struct Neighbor {
uint16 x;
uint16 y;
uint32 d;
};
// Compute euclidean squared distance.
static uint dist( uint16 ax, uint16 ay, uint16 bx, uint16 by ) {
int dx = bx - ax;
int dy = by - ay;
return uint(dx*dx + dy*dy);
}
// Check neighbour, this is the core of the EDT algorithm.
static void checkNeighbour( int x, int y, Neighbor * e, const Neighbor & n ) {
nvDebugCheck(e != NULL);
uint d = dist( x, y, n.x, n.y );
if( d < e->d ) {
e->x = n.x;
e->y = n.y;
e->d = d;
}
}
} // namespace
// Voronoi filling using EDT-4
// This implementation is based on Danielsson's algorithm published in:
// "Euclidean Distance Mapping" Per-Erik Danielsson, Computer Graphics and Image Processing, 14, 1980
void nv::fillVoronoi(FloatImage * img, const BitMap * bmap)
{
nvCheck(img != NULL);
const int w = img->width();
const int h = img->height();
const int count = img->componentNum();
nvCheck(bmap->width() == uint(w));
nvCheck(bmap->height() == uint(h));
Array<Neighbor> edm;
edm.resize(w * h);
int x, y;
int x0, x1, y0, y1;
// Init edm.
for( y = 0; y < h; y++ ) {
for( x = 0; x < w; x++ ) {
if( bmap->bitAt(x, y) ) {
edm[y * w + x].x = x;
edm[y * w + x].y = y;
edm[y * w + x].d = 0;
}
else {
edm[y * w + x].x = w;
edm[y * w + x].y = h;
edm[y * w + x].d = w*w + h*h;
}
}
}
// First pass.
for( y = 0; y < h; y++ ) {
for( x = 0; x < w; x++ ) {
x0 = clamp(x-1, 0, w-1); // @@ Wrap?
x1 = clamp(x+1, 0, w-1);
y0 = clamp(y-1, 0, h-1);
Neighbor & e = edm[y * w + x];
checkNeighbour(x, y, &e, edm[y0 * w + x0]);
checkNeighbour(x, y, &e, edm[y0 * w + x]);
checkNeighbour(x, y, &e, edm[y0 * w + x1]);
checkNeighbour(x, y, &e, edm[y * w + x0]);
}
for( x = w-1; x >= 0; x-- ) {
x1 = clamp(x+1, 0, w-1);
Neighbor & e = edm[y * w + x];
checkNeighbour(x, y, &e, edm[y * w + x1]);
}
}
// Third pass.
for( y = h-1; y >= 0; y-- ) {
for( x = w-1; x >= 0; x-- ) {
x0 = clamp(x-1, 0, w-1);
x1 = clamp(x+1, 0, w-1);
y1 = clamp(y+1, 0, h-1);
Neighbor & e = edm[y * w + x];
checkNeighbour(x, y, &e, edm[y * w + x1]);
checkNeighbour(x, y, &e, edm[y1 * w + x0]);
checkNeighbour(x, y, &e, edm[y1 * w + x]);
checkNeighbour(x, y, &e, edm[y1 * w + x1]);
}
for( x = 0; x < w; x++ ) {
x0 = clamp(x-1, 0, w-1);
Neighbor & e = edm[y * w + x];
checkNeighbour(x, y, &e, edm[y * w + x0]);
}
}
// Fill empty holes.
for( y = 0; y < h; y++ ) {
for( x = 0; x < w; x++ ) {
const int sx = edm[y * w + x].x;
const int sy = edm[y * w + x].y;
if (sx < w && sy < h)
{
if (sx != x || sy != y) {
for(int c = 0; c < count; c++ ) {
img->setPixel(img->pixel(sx, sy, c), x, y, c);
}
}
}
}
}
}
static bool downsample(const FloatImage * src, const BitMap * srcMask, const FloatImage ** _dst, const BitMap ** _dstMask)
{
const uint w = src->width();
const uint h = src->height();
const uint count = src->componentNum();
// count holes in srcMask, return false if fully filled.
uint holes = 0;
for(uint y = 0; y < h; y++) {
for(uint x = 0; x < w; x++) {
holes += srcMask->bitAt(x, y) == 0;
}
}
if (holes == 0 || (w == 2 || h == 2)) {
// Stop when no holes or when the texture is very small.
return false;
}
// Apply box filter to image and mask and return true.
const uint nw = w / 2;
const uint nh = h / 2;
FloatImage * dst = new FloatImage();
dst->allocate(count, nw, nh);
BitMap * dstMask = new BitMap(nw, nh);
dstMask->clearAll();
for(uint c = 0; c < count; c++) {
for(uint y = 0; y < nh; y++) {
for(uint x = 0; x < nw; x++) {
const uint x0 = 2 * x + 0;
const uint x1 = 2 * x + 1;
const uint y0 = 2 * y + 0;
const uint y1 = 2 * y + 1;
const float f0 = src->pixel(x0, y0, c);
const float f1 = src->pixel(x1, y0, c);
const float f2 = src->pixel(x0, y1, c);
const float f3 = src->pixel(x1, y1, c);
const bool b0 = srcMask->bitAt(x0, y0);
const bool b1 = srcMask->bitAt(x1, y0);
const bool b2 = srcMask->bitAt(x0, y1);
const bool b3 = srcMask->bitAt(x1, y1);
if (b0 || b1 || b2 || b3) {
// Set bit mask.
dstMask->setBitAt(x, y);
// Set pixel.
float value = 0.0f;
int total = 0;
if (b0) { value += f0; total++; }
if (b1) { value += f1; total++; }
if (b2) { value += f2; total++; }
if (b3) { value += f3; total++; }
dst->setPixel(value / total, x, y, c);
}
}
}
}
*_dst = dst;
*_dstMask = dstMask;
return true;
}
// This is the filter used in the Lumigraph paper.
void nv::fillPullPush(FloatImage * img, const BitMap * bmap)
{
nvCheck(img != NULL);
const uint count = img->componentNum();
const uint w = img->width();
const uint h = img->height();
const uint num = log2(max(w,h));
// Build mipmap chain.
Array<const FloatImage *> mipmaps(num);
Array<const BitMap *> mipmapMasks(num);
mipmaps.append(img);
mipmapMasks.append(bmap);
const FloatImage * current;
const BitMap * currentMask;
// Compute mipmap chain.
while(downsample(mipmaps.back(), mipmapMasks.back(), &current, &currentMask))
{
mipmaps.append(current);
mipmapMasks.append(currentMask);
}
// Sample mipmaps until non-hole is found.
for(uint y = 0; y < h; y++) {
for(uint x = 0; x < w; x++) {
int sx = x;
int sy = y;
//float sx = x;
//float sy = y;
const uint levelCount = mipmaps.count();
for (uint l = 0; l < levelCount; l++)
{
//const float fx = sx / mipmaps[l]->width();
//const float fy = sy / mipmaps[l]->height();
if (mipmapMasks[l]->bitAt(sx, sy))
{
// Sample mipmaps[l](sx, sy) and copy to img(x, y)
for(uint c = 0; c < count; c++) {
//img->setPixel(mipmaps[l]->linear_clamp(fx, fy, c), x, y, c);
img->setPixel(mipmaps[l]->pixel(sx, sy, c), x, y, c);
}
break;
}
sx /= 2;
sy /= 2;
}
}
}
// Don't delete the original image and mask.
mipmaps[0] = NULL;
mipmapMasks[0] = NULL;
// Delete the mipmaps.
deleteAll(mipmaps);
deleteAll(mipmapMasks);
}
// It looks much cooler with trilinear filtering
void nv::fillPullPushLinear(FloatImage * img, const BitMap * bmap)
{
nvCheck(img != NULL);
const uint count = img->componentNum();
const uint w = img->width();
const uint h = img->height();
const uint num = log2(max(w,h));
// Build mipmap chain.
Array<const FloatImage *> mipmaps(num);
Array<const BitMap *> mipmapMasks(num);
mipmaps.append(img);
mipmapMasks.append(bmap);
const FloatImage * current;
const BitMap * currentMask;
// Compute mipmap chain.
while(downsample(mipmaps.back(), mipmapMasks.back(), &current, &currentMask))
{
mipmaps.append(current);
mipmapMasks.append(currentMask);
}
// Sample mipmaps until non-hole is found.
for(uint y = 0; y < h; y++) {
for(uint x = 0; x < w; x++) {
float sx = x;
float sy = y;
float coverageSum = 0.0f;
const uint levelCount = mipmaps.count();
for (uint l = 0; l < levelCount; l++)
{
const float fx = sx / mipmaps[l]->width();
const float fy = sy / mipmaps[l]->height();
float coverage = mipmapMasks[l]->sampleLinearClamp(sx, sy);
if (coverage > 0.0f)
{
// Sample mipmaps[l](sx, sy) and copy to img(x, y)
for(uint c = 0; c < count; c++) {
img->addPixel((1 - coverageSum) * mipmaps[l]->sampleLinearClamp(fx, fy, c), x, y, c);
}
coverageSum += coverage;
if (coverageSum >= 1.0f)
{
break;
}
}
sx /= 2;
sy /= 2;
}
}
}
// Don't delete the original image and mask.
mipmaps[0] = NULL;
mipmapMasks[0] = NULL;
// Delete the mipmaps.
deleteAll(mipmaps);
deleteAll(mipmapMasks);
}
/*
This Code is from Charles Bloom:
DoPixelSeamFix
10-20-02
Looks in the 5x5 local neighborhood (LocalPixels) of the desired pixel to fill.
It tries to build a quadratic model of the neighborhood surface to use in
extrapolating. You need 5 pixels to establish a 2d quadratic curve.
This is really just a nice generic way to extrapolate pixels. It also happens
to work great for seam-fixing.
Note that I'm working on normals, but I treat them just as 3 scalars and normalize
at the end. To be more correct, I would work on the surface of a sphere, but that
just seems like way too much work.
*/
struct LocalPixels
{
// 5x5 neighborhood
// the center is at result
// index [y][x]
bool fill[5][5];
float data[5][5];
mutable float result;
mutable float weight;
bool Quad3SubH(float * pQ, int row) const
{
const bool * pFill = fill[row];
const float * pDat = data[row];
if ( pFill[1] && pFill[2] && pFill[3] )
{
// good row
*pQ = pDat[1] - 2.f * pDat[2] + pDat[3];
return true;
}
else if ( pFill[0] && pFill[1] && pFill[2] )
{
// good row
*pQ = pDat[0] - 2.f * pDat[1] + pDat[2];
return true;
}
else if ( pFill[2] && pFill[3] && pFill[4] )
{
// good row
*pQ = pDat[2] - 2.f * pDat[3] + pDat[4];
return true;
}
return false;
}
// improve result with a horizontal quad in row 1 and/or
bool Quad3SubV(float * pQ, int col) const
{
if ( fill[1][col] && fill[2][col] && fill[3][col] )
{
// good row
*pQ = data[1][col] - 2.f * data[2][col] + data[3][col];
return true;
}
else if ( fill[0][col] && fill[1][col] && fill[2][col] )
{
// good row
*pQ = data[0][col] - 2.f * data[1][col] + data[2][col];
return true;
}
else if ( fill[2][col] && fill[3][col] && fill[4][col] )
{
// good row
*pQ = data[2][col] - 2.f * data[3][col] + data[4][col];
return true;
}
return false;
}
bool Quad3H(float * pQ) const
{
if (!Quad3SubH(pQ,1))
{
return Quad3SubH(pQ,3);
}
float q = 0.0f; // initializer not needed, just make it shut up
if (Quad3SubH(&q, 3))
{
// got q and pQ
*pQ = (*pQ+q)*0.5f;
}
return true;
}
bool Quad3V(float * pQ) const
{
if (!Quad3SubV(pQ, 1))
{
return Quad3SubV(pQ, 3);
}
float q = 0.0f; // initializer not needed, just make it shut up
if (Quad3SubV(&q, 3))
{
// got q and pQ
*pQ = (*pQ + q) * 0.5f;
}
return true;
}
// Quad returns ([0]+[2] - 2.f*[1])
// a common want is [1] - ([0]+[2])*0.5f ;
// so use -0.5f*Quad
bool tryQuads() const
{
bool res = false;
// look for a pair that straddles the middle:
if ( fill[2][1] && fill[2][3] )
{
// got horizontal straddle
float q;
if ( Quad3H(&q) )
{
result += (data[2][1] + data[2][3] - q) * 0.5f;
weight += 1.f;
res = true;
}
}
if ( fill[1][2] && fill[3][2] )
{
// got vertical straddle
float q;
if ( Quad3V(&q) )
{
result += (data[1][2] + data[3][2] - q) * 0.5f;
weight += 1.f;
res = true;
}
}
// look for pairs that lead into the middle :
if ( fill[2][0] && fill[2][1] )
{
// got left-side pair
float q;
if ( Quad3H(&q) )
{
result += data[2][1]*2.f - data[2][0] + q;
weight += 1.f;
res = true;
}
}
if ( fill[2][3] && fill[2][4] )
{
// got right-side pair
float q;
if ( Quad3H(&q) )
{
result += data[2][3]*2.f - data[2][4] + q;
weight += 1.f;
res = true;
}
}
if ( fill[0][2] && fill[1][2] )
{
// got left-side pair
float q;
if ( Quad3V(&q) )
{
result += data[1][2]*2.f - data[0][2] + q;
weight += 1.f;
res = true;
}
}
if ( fill[3][2] && fill[4][2] )
{
// got right-side pair
float q;
if ( Quad3V(&q) )
{
result += data[3][2]*2.f - data[4][2] + q;
weight += 1.f;
res = true;
}
}
return res;
}
bool tryPlanar() const
{
// four cases :
const int indices[] =
{
2,1, 1,2, 1,1,
2,1, 3,2, 3,1,
2,3, 1,2, 1,3,
2,3, 3,2, 3,3
};
bool res = false;
for (int i = 0; i < 4; i++)
{
const int * I = indices + i*6;
if (!fill[ I[0] ][ I[1] ])
continue;
if (!fill[ I[2] ][ I[3] ])
continue;
if (!fill[ I[4] ][ I[5] ])
continue;
result += data[ I[0] ][ I[1] ] + data[ I[2] ][ I[3] ] - data[ I[4] ][ I[5] ];
weight += 1.0f;
res = true;
}
return res;
}
bool tryTwos() const
{
bool res = false;
if (fill[2][1] && fill[2][3])
{
result += (data[2][1] + data[2][3]) * 0.5f;
weight += 1.0f;
res = true;
}
if (fill[1][2] && fill[3][2])
{
result += (data[1][2] + data[3][2]) * 0.5f;
weight += 1.0f;
res = true;
}
// four side-rotates :
const int indices[] =
{
2,1, 2,0,
2,3, 2,4,
1,2, 0,2,
3,2, 4,2,
};
for (int i = 0; i < 4; i++)
{
const int * I = indices + i*4;
if (!fill[ I[0] ][ I[1] ])
continue;
if (!fill[ I[2] ][ I[3] ])
continue;
result += data[ I[0] ][ I[1] ]*2.0f - data[ I[2] ][ I[3] ];
weight += 1.0f;
res = true;
}
return res;
}
bool doLocalPixelFill() const
{
result = 0.0f;
weight = 0.0f;
if (tryQuads()) {
return true;
}
if (tryPlanar()) {
return true;
}
return tryTwos();
}
}; // struct LocalPixels
// This is a quadratic extrapolation filter from Charles Bloom (DoPixelSeamFix). Used with his permission.
void nv::fillQuadraticExtrapolate(int passCount, FloatImage * img, BitMap * bmap, int coverageIndex /*= -1*/)
{
nvCheck(passCount > 0);
nvCheck(img != NULL);
nvCheck(bmap != NULL);
const int w = img->width();
const int h = img->height();
const int count = img->componentNum();
nvCheck(bmap->width() == uint(w));
nvCheck(bmap->height() == uint(h));
AutoPtr<BitMap> newbmap( new BitMap(w, h) );
newbmap->clearAll();
float * coverageChannel = NULL;
if (coverageIndex != -1)
{
coverageChannel = img->channel(coverageIndex);
}
int firstChannel = -1;
for (int p = 0; p < passCount; p++)
{
for (int c = 0; c < count; c++)
{
if (c == coverageIndex) continue;
if (firstChannel == -1) firstChannel = c;
float * channel = img->channel(c);
for (int yb = 0; yb < h; yb++) {
for (int xb = 0; xb < w; xb++) {
if (bmap->bitAt(xb, yb)) {
// Not a hole.
newbmap->setBitAt(xb, yb);
continue;
}
int numFill = 0;
LocalPixels lp;
for (int ny = 0; ny < 5; ny++)
{
int y = (yb + ny - 2);
if ( y < 0 || y >= h )
{
// out of range
for(int i = 0; i < 5; i++)
{
lp.fill[ny][i] = false;
}
continue;
}
for (int nx = 0; nx < 5; nx++)
{
int x = (xb + nx - 2);
if (x < 0 || x >= w)
{
lp.fill[ny][nx] = false;
}
else
{
int idx = img->index(x, y);
if (!bmap->bitAt(idx))
{
lp.fill[ny][nx] = false;
}
else
{
lp.fill[ny][nx] = true;
lp.data[ny][nx] = channel[idx];
numFill++;
}
}
}
}
// need at least 3 to do anything decent
if (numFill < 2)
continue;
nvDebugCheck(lp.fill[2][2] == false);
if (lp.doLocalPixelFill())
{
const int idx = img->index(xb, yb);
channel[idx] = lp.result / lp.weight;
if (c == firstChannel)
{
//coverageChannel[idx] /= lp.weight; // @@ Not sure what this was for, coverageChannel[idx] is always zero.
newbmap->setBitAt(xb, yb);
}
}
}
}
}
// Update the bit mask.
swap(*newbmap, *bmap);
}
}

98
src/nvimage/HoleFilling.h
View File

@ -1,98 +0,0 @@
// This code is in the public domain -- castanyo@yahoo.es
#ifndef NV_IMAGE_HOLEFILLING_H
#define NV_IMAGE_HOLEFILLING_H
#include <nvcore/BitArray.h>
#include <nvimage/nvimage.h>
namespace nv
{
class FloatImage;
/// Bit mask.
class BitMap
{
public:
BitMap(uint w, uint h) :
m_width(w), m_height(h), m_bitArray(w*h)
{
}
uint width() const { return m_width; }
uint height() const { return m_height; }
float sampleLinearClamp(float x, float y) const;
bool bitAt(uint x, uint y) const
{
nvDebugCheck(x < m_width && y < m_height);
return m_bitArray.bitAt(y * m_width + x);
}
bool bitAt(uint idx) const
{
return m_bitArray.bitAt(idx);
}
void setBitAt(uint x, uint y)
{
nvDebugCheck(x < m_width && y < m_height);
m_bitArray.setBitAt(y * m_width + x);
}
void setBitAt(uint idx)
{
m_bitArray.setBitAt(idx);
}
void clearBitAt(uint x, uint y)
{
nvDebugCheck(x < m_width && y < m_height);
m_bitArray.clearBitAt(y * m_width + x);
}
void clearBitAt(uint idx)
{
m_bitArray.clearBitAt(idx);
}
void clearAll()
{
m_bitArray.clearAll();
}
void setAll()
{
m_bitArray.setAll();
}
void toggleAll()
{
m_bitArray.toggleAll();
}
friend void swap(BitMap & a, BitMap & b)
{
nvCheck(a.m_width == b.m_width);
nvCheck(a.m_height == b.m_height);
//swap(const_cast<uint &>(a.m_width), const_cast<uint &>(b.m_width));
//swap(const_cast<uint &>(a.m_height), const_cast<uint &>(b.m_height));
swap(a.m_bitArray, b.m_bitArray);
}
private:
const uint m_width;
const uint m_height;
BitArray m_bitArray;
};
NVIMAGE_API void fillVoronoi(FloatImage * img, const BitMap * bmap);
NVIMAGE_API void fillPullPush(FloatImage * img, const BitMap * bmap);
NVIMAGE_API void fillPullPushLinear(FloatImage * img, const BitMap * bmap);
NVIMAGE_API void fillExtrapolate(int passCount, FloatImage * img, BitMap * bmap);
NVIMAGE_API void fillQuadraticExtrapolate(int passCount, FloatImage * img, BitMap * bmap, int coverageIndex = -1);
} // nv namespace
#endif // NV_IMAGE_HOLEFILLING_H

411
src/nvimage/ImageIO.cpp
View File

@ -12,8 +12,6 @@
#include <nvcore/Containers.h>
#include <nvcore/StrLib.h>
#include <nvcore/StdStream.h>
#include <nvcore/Tokenizer.h>
#include <nvcore/TextWriter.h>
// Extern
#if defined(HAVE_JPEG)
@ -186,13 +184,6 @@ FloatImage * nv::ImageIO::loadFloat(const char * fileName, Stream & s)
}
#endif
if (strCaseCmp(extension, ".pfm") == 0) {
return loadFloatPFM(fileName, s);
}
if (strCaseCmp(extension, ".hdr") == 0) {
return loadGridFloat(fileName, s);
}
return NULL;
}
@ -215,12 +206,6 @@ bool nv::ImageIO::saveFloat(const char * fileName, const FloatImage * fimage, ui
}
#endif
// @@ Disable Temporarily
if (strCaseCmp(extension, ".pfm") == 0)
{
// return ImageIO::saveFloatPFM(fileName, fimage, base_component, num_components);
}
//if (num_components == 3 || num_components == 4)
if (num_components <= 4)
{
@ -1532,399 +1517,3 @@ bool nv::ImageIO::saveFloatEXR(const char * fileName, const FloatImage * fimage,
#endif // defined(HAVE_OPENEXR)
FloatImage * nv::ImageIO::loadFloatPFM(const char * fileName, Stream & s)
{
nvCheck(s.isLoading());
nvCheck(!s.isError());
Tokenizer parser(&s);
parser.nextToken();
bool grayscale;
if (parser.token() == "PF")
{
grayscale = false;
}
else if (parser.token() == "Pf")
{
grayscale = true;
}
else
{
// Invalid file.
return NULL;
}
parser.nextLine();
int width = parser.token().toInt(); parser.nextToken();
int height = parser.token().toInt();
parser.nextLine();
float scaleFactor = parser.token().toFloat();
if (scaleFactor >= 0)
{
s.setByteOrder(Stream::BigEndian);
}
else
{
s.setByteOrder(Stream::LittleEndian);
}
scaleFactor = fabsf(scaleFactor);
// Allocate image.
AutoPtr<FloatImage> fimage(new FloatImage());
if (grayscale)
{
fimage->allocate(1, width, height);
float * channel = fimage->channel(0);
for (int i = 0; i < width * height; i++)
{
s << channel[i];
}
}
else
{
fimage->allocate(3, width, height);
float * rchannel = fimage->channel(0);
float * gchannel = fimage->channel(1);
float * bchannel = fimage->channel(2);
for (int i = 0; i < width * height; i++)
{
s << rchannel[i] << gchannel[i] << bchannel[i];
}
}
return fimage.release();
}
bool nv::ImageIO::saveFloatPFM(const char * fileName, const FloatImage * fimage, uint base_component, uint num_components)
{
nvCheck(fileName != NULL);
nvCheck(fimage != NULL);
nvCheck(fimage->componentNum() <= base_component + num_components);
nvCheck(num_components == 1 || num_components == 3);
StdOutputStream stream(fileName);
TextWriter writer(&stream);
if (num_components == 1) writer.write("Pf\n");
else /*if (num_components == 3)*/ writer.write("PF\n");
int w = fimage->width();
int h = fimage->height();
writer.write("%d %d\n", w, h);
writer.write("%f\n", -1.0f); // little endian with 1.0 scale.
if (num_components == 1)
{
float * channel = const_cast<float *>(fimage->channel(0));
for (int i = 0; i < w * h; i++)
{
stream << channel[i];
}
}
else
{
float * rchannel = const_cast<float *>(fimage->channel(0));
float * gchannel = const_cast<float *>(fimage->channel(1));
float * bchannel = const_cast<float *>(fimage->channel(2));
for (int i = 0; i < w * h; i++)
{
stream << rchannel[i] << gchannel[i] << bchannel[i];
}
}
return true;
}
//#pragma warning(disable : 4996)
NVIMAGE_API FloatImage * nv::ImageIO::loadGridFloat(const char * fileName, Stream & s)
{
nvCheck(s.isLoading());
nvCheck(!s.isError());
Tokenizer parser(&s);
parser.nextLine();
if (parser.token() != "ncols")
{
nvDebug("Failed to find 'ncols' token in file '%s'.\n", fileName);
return NULL;
}
parser.nextToken(true);
const int nCols = parser.token().toInt();
parser.nextToken(true);
if (parser.token() != "nrows")
{
nvDebug("Failed to find 'nrows' token in file '%s'.\n", fileName);
return NULL;
}
parser.nextToken(true);
const int nRows = parser.token().toInt();
/* There's a byte order defined in the header. We could read it. However, here we
just assume that it matches the platform's byte order.
// There is then a bunch of data that we don't care about (lat, long definitions, etc).
for (int i=0; i!=9; ++i)
parser.nextToken(true);
if (parser.token() != "byteorder")
return NULL;
parser.nextToken(true);
const Stream::ByteOrder byteOrder = (parser.token() == "LSBFIRST")? Stream::LittleEndian: Stream::BigEndian;
*/
// GridFloat comes in two files: an ASCII header which was parsed above (.hdr) and a big blob
// of binary data in a .flt file.
Path dataPath(fileName);
dataPath.stripExtension();
dataPath.append(".flt");
// Open the binary data.
FILE* file = fopen(dataPath.fileName(), "rb");
if (!file)
{
nvDebug("Failed to find GridFloat blob file '%s' corresponding to '%s'.\n", dataPath.fileName(), fileName);
return NULL;
}
// Allocate image.
AutoPtr<FloatImage> fimage(new FloatImage());
fimage->allocate(1, nCols, nRows);
float * channel = fimage->channel(0);
// The binary blob is defined to be in row-major order, containing IEEE floats.
// So we can just slurp it in. Theoretically, we ought to use the byte order.
const size_t nRead = fread((void*) channel, sizeof(float), nRows * nCols, file);
fclose(file);
return fimage.release();
}
#if 0
/** Save PNG*/
static bool SavePNG(const PiImage * img, const char * name) {
nvCheck( img != NULL );
nvCheck( img->mem != NULL );
if( piStrCmp(piExtension(name), ".png" ) != 0 ) {
return false;
}
if( img->flags & PI_IT_CUBEMAP ) {
nvDebug("*** Cannot save cubemaps as PNG.");
return false;
}
if( img->flags & PI_IT_DDS ) {
nvDebug("*** Cannot save DDS surface as PNG.");
return false;
}
nvDebug( "--- Saving '%s'.\n", name );
PiAutoPtr<PiStream> ar( PiFileSystem::CreateFileWriter( name ) );
if( ar == NULL ) {
nvDebug( "*** SavePNG: Error, cannot save file '%s'.\n", name );
return false;
}
/*
public class PNGEnc {
public static function encode(img:BitmapData):ByteArray {
// Create output byte array
var png:ByteArray = new ByteArray();
// Write PNG signature
png.writeUnsignedInt(0x89504e47);
png.writeUnsignedInt(0x0D0A1A0A);
// Build IHDR chunk
var IHDR:ByteArray = new ByteArray();
IHDR.writeInt(img.width);
IHDR.writeInt(img.height);
IHDR.writeUnsignedInt(0x08060000); // 32bit RGBA
IHDR.writeByte(0);
writeChunk(png,0x49484452,IHDR);
// Build IDAT chunk
var IDAT:ByteArray= new ByteArray();
for(var i:int=0;i < img.height;i++) {
// no filter
IDAT.writeByte(0);
var p:uint;
if ( !img.transparent ) {
for(var j:int=0;j < img.width;j++) {
p = img.getPixel(j,i);
IDAT.writeUnsignedInt(
uint(((p&0xFFFFFF) << 8)|0xFF));
}
} else {
for(var j:int=0;j < img.width;j++) {
p = img.getPixel32(j,i);
IDAT.writeUnsignedInt(
uint(((p&0xFFFFFF) << 8)|
(shr(p,24))));
}
}
}
IDAT.compress();
writeChunk(png,0x49444154,IDAT);
// Build IEND chunk
writeChunk(png,0x49454E44,null);
// return PNG
return png;
}
private static var crcTable:Array;
private static var crcTableComputed:Boolean = false;
private static function writeChunk(png:ByteArray,
type:uint, data:ByteArray) {
if (!crcTableComputed) {
crcTableComputed = true;
crcTable = [];
for (var n:uint = 0; n < 256; n++) {
var c:uint = n;
for (var k:uint = 0; k < 8; k++) {
if (c & 1) {
c = uint(uint(0xedb88320) ^
uint(c >>> 1));
} else {
c = uint(c >>> 1);
}
}
crcTable[n] = c;
}
}
var len:uint = 0;
if (data != null) {
len = data.length;
}
png.writeUnsignedInt(len);
var p:uint = png.position;
png.writeUnsignedInt(type);
if ( data != null ) {
png.writeBytes(data);
}
var e:uint = png.position;
png.position = p;
var c:uint = 0xffffffff;
for (var i:int = 0; i < (e-p); i++) {
c = uint(crcTable[
(c ^ png.readUnsignedByte()) &
uint(0xff)] ^ uint(c >>> 8));
}
c = uint(c^uint(0xffffffff));
png.position = e;
png.writeUnsignedInt(c);
}
}
*/
}
#endif // 0
#if 0
namespace ImageIO {
/** Init ImageIO plugins. */
void InitPlugins() {
// AddInputPlugin( "", LoadANY );
AddInputPlugin( "tga", LoadTGA );
#if HAVE_PNG
AddInputPlugin( "png", LoadPNG );
#endif
#if HAVE_JPEG
AddInputPlugin( "jpg", LoadJPG );
#endif
AddInputPlugin( "dds", LoadDDS );
AddOutputPlugin( "tga", SaveTGA );
}
/** Reset ImageIO plugins. */
void ResetPlugins() {
s_plugin_load_map.Clear();
s_plugin_save_map.Clear();
}
/** Add an input plugin. */
void AddInputPlugin( const char * ext, ImageInput_Plugin plugin ) {
s_plugin_load_map.Add(ext, plugin);
}
/** Add an output plugin. */
void AddOutputPlugin( const char * ext, ImageOutput_Plugin plugin ) {
s_plugin_save_map.Add(ext, plugin);
}
bool Load(PiImage * img, const char * name, PiStream & stream) {
// Get name extension.
const char * extension = piExtension(name);
// Skip the dot.
if( *extension == '.' ) {
extension++;
}
// Lookup plugin in the map.
ImageInput_Plugin plugin = NULL;
if( s_plugin_load_map.Get(extension, &plugin) ) {
return plugin(img, stream);
}
/*foreach(i, s_plugin_load_map) {
nvDebug("%s %s %d\n", s_plugin_load_map[i].key.GetStr(), extension, 0 == strcmp(extension, s_plugin_load_map[i].key));
}
nvDebug("No plugin found for '%s' %d.\n", extension, s_plugin_load_map.Size());*/
return false;
}
bool Save(const PiImage * img, const char * name, PiStream & stream) {
// Get name extension.
const char * extension = piExtension(name);
// Skip the dot.
if( *extension == '.' ) {
extension++;
}
// Lookup plugin in the map.
ImageOutput_Plugin plugin = NULL;
if( s_plugin_save_map.Get(extension, &plugin) ) {
return plugin(img, stream);
}
return false;
}
} // ImageIO
#endif // 0

8
src/nvimage/ImageIO.h
View File

@ -53,14 +53,6 @@ namespace nv
NVIMAGE_API bool saveFloatEXR(const char * fileName, const FloatImage * fimage, uint base_component, uint num_components);
#endif
NVIMAGE_API FloatImage * loadFloatPFM(const char * fileName, Stream & s);
NVIMAGE_API bool saveFloatPFM(const char * fileName, const FloatImage * fimage, uint base_component, uint num_components);
// GridFloat is a simple, open format for terrain elevation data. See http://ned.usgs.gov/Ned/faq.asp.
// Expects: 1) fileName will be an ".hdr" header file, 2) there will also exist a corresponding float data
// blob in a ".flt" file. (This is what USGS gives you.)
NVIMAGE_API FloatImage * loadGridFloat(const char * fileName, Stream & s);
} // ImageIO namespace
} // nv namespace

17
src/nvimage/NormalMipmap.h
View File

@ -1,17 +0,0 @@
// This code is in the public domain -- castanyo@yahoo.es
#ifndef NV_IMAGE_NORMALMIPMAP_H
#define NV_IMAGE_NORMALMIPMAP_H
#include <nvimage/nvimage.h>
namespace nv
{
class FloatImage;
FloatImage * createNormalMipmapMap(const FloatImage * img);
} // nv namespace
#endif // NV_IMAGE_NORMALMIPMAP_H

1
src/nvmath/CMakeLists.txt
View File

@ -7,7 +7,6 @@ SET(MATH_SRCS
Plane.h Plane.cpp
Box.h
Color.h
Random.h Random.cpp
Half.h Half.cpp
Fitting.h Fitting.cpp)

135
src/nvmath/Montecarlo.cpp
View File

@ -1,135 +0,0 @@
// This code is in the public domain -- castanyo@yahoo.es
#include <nvmath/Montecarlo.h>
using namespace nv;
void SampleDistribution::redistribute(Method method/*=Method_NRook*/, Distribution dist/*=Distribution_Cosine*/)
{
switch(method)
{
case Method_Random:
redistributeRandom(dist);
break;
case Method_Stratified:
redistributeStratified(dist);
break;
case Method_NRook:
redistributeNRook(dist);
break;
};
}
void SampleDistribution::redistributeRandom(const Distribution dist)
{
const uint sampleCount = m_sampleArray.count();
// This is the worst method possible!
for(uint i = 0; i < sampleCount; i++)
{
float x = m_rand.getFloat();
float y = m_rand.getFloat();
setSample(i, dist, x, y);
}
}
void SampleDistribution::redistributeStratified(const Distribution dist)
{
const uint sampleCount = m_sampleArray.count();
const uint sqrtSampleCount = uint(sqrtf(float(sampleCount)));
nvDebugCheck(sqrtSampleCount*sqrtSampleCount == sampleCount); // Must use exact powers!
// Create a uniform distribution of points on the hemisphere with low variance.
for(uint v = 0, i = 0; v < sqrtSampleCount; v++) {
for(uint u = 0; u < sqrtSampleCount; u++, i++) {
float x = (u + m_rand.getFloat()) / float(sqrtSampleCount);
float y = (v + m_rand.getFloat()) / float(sqrtSampleCount);
setSample(i, dist, x, y);
}
}
}
/** Multi-Stage N-rooks Sampling Method.
* See: http://www.acm.org/jgt/papers/WangSung9/9
*/
void SampleDistribution::multiStageNRooks(const int size, int* cells)
{
if (size == 1) {
return;
}
int size1 = size >> 1;
int size2 = size >> 1;
if (size & 1) {
if (m_rand.getFloat() > 0.5) {
size1++;
}
else {
size2++;
}
}
int* upper_cells = new int[size1];
int* lower_cells = new int[size2];
int i, j;
for(i = 0, j = 0; i < size - 1; i += 2, j++) {
if (m_rand.get() & 1) {
upper_cells[j] = cells[i];
lower_cells[j] = cells[i + 1];
}
else {
upper_cells[j] = cells[i + 1];
lower_cells[j] = cells[i];
}
}
if (size1 != size2) {
if (size1 > size2) {
upper_cells[j] = cells[i];
}
else {
lower_cells[j] = cells[i];
}
}
multiStageNRooks(size1, upper_cells);
memcpy(cells, upper_cells, size1 * sizeof(int));
delete [] upper_cells;
multiStageNRooks(size2, lower_cells);
memcpy(cells + size1, lower_cells, size2 * sizeof(int));
delete [] lower_cells;
}
void SampleDistribution::redistributeNRook(const Distribution dist)
{
const uint sampleCount = m_sampleArray.count();
// Generate nrook cells
int * cells = new int[sampleCount];
for(uint32 i = 0; i < sampleCount; i++)
{
cells[i] = i;
}
multiStageNRooks(sampleCount, cells);
for(uint i = 0; i < sampleCount; i++)
{
float x = (i + m_rand.getFloat()) / sampleCount;
float y = (cells[i] + m_rand.getFloat()) / sampleCount;
setSample(i, dist, x, y);
}
delete [] cells;
}

103
src/nvmath/Montecarlo.h
View File

@ -1,103 +0,0 @@
// This code is in the public domain -- castanyo@yahoo.es
#ifndef NV_MATH_MONTECARLO_H
#define NV_MATH_MONTECARLO_H
#include <nvmath/Vector.h>
#include <nvmath/Random.h>
namespace nv
{
/// A random sample distribution.
class SampleDistribution
{
public:
// Sampling method.
enum Method {
Method_Random,
Method_Stratified,
Method_NRook
};
// Distribution functions.
enum Distribution {
Distribution_UniformSphere,
Distribution_UniformHemisphere,
Distribution_CosineHemisphere
};
/// Constructor.
SampleDistribution(uint num)
{
m_sampleArray.resize(num);
}
uint count() const { return m_sampleArray.count(); }
void redistribute(Method method=Method_NRook, Distribution dist=Distribution_CosineHemisphere);
/// Get parametric coordinates of the sample.
Vector2 sample(int i) const { return m_sampleArray[i].uv; }
/// Get sample direction.
Vector3 sampleDir(int i) const { return m_sampleArray[i].dir; }
/// Get number of samples.
uint sampleCount() const { return m_sampleArray.count(); }
private:
void redistributeRandom(const Distribution dist);
void redistributeStratified(const Distribution dist);
void multiStageNRooks(const int size, int* cells);
void redistributeNRook(const Distribution dist);
/// A sample of the random distribution.
struct Sample
{
/// Set sample given the 3d coordinates.
void setDir(float x, float y, float z) {
dir.set(x, y, z);
uv.set(acosf(z), atan2f(y, x));
}
/// Set sample given the 2d parametric coordinates.
void setUV(float u, float v) {
uv.set(u, v);
dir.set(sinf(u) * cosf(v), sinf(u) * sinf(v), cosf(u));
}
Vector2 uv;
Vector3 dir;
};
inline void setSample(uint i, Distribution dist, float x, float y)
{
// Map uniform distribution in the square to desired domain.
if( dist == Distribution_UniformSphere ) {
m_sampleArray[i].setUV(acosf(1 - 2 * x), 2 * PI * y);
}
else if( dist == Distribution_UniformHemisphere ) {
m_sampleArray[i].setUV(acosf(x), 2 * PI * y);
}
else {
nvDebugCheck(dist == Distribution_CosineHemisphere);
m_sampleArray[i].setUV(acosf(sqrtf(x)), 2 * PI * y);
}
}
/// Random seed.
MTRand m_rand;
/// Samples.
Array<Sample> m_sampleArray;
};
} // nv namespace
#endif // NV_MATH_MONTECARLO_H

54
src/nvmath/Random.cpp
View File

@ -1,54 +0,0 @@
// This code is in the public domain -- castanyo@yahoo.es
#include <nvmath/Random.h>
#include <time.h>
using namespace nv;
// Statics
const uint16 Rand48::a0 = 0xE66D;
const uint16 Rand48::a1 = 0xDEEC;
const uint16 Rand48::a2 = 0x0005;
const uint16 Rand48::c0 = 0x000B;
/// Get a random seed based on the current time.
uint Rand::randomSeed()
{
return (uint)time(NULL);
}
void MTRand::initialize( uint32 seed )
{
// Initialize generator state with seed
// See Knuth TAOCP Vol 2, 3rd Ed, p.106 for multiplier.
// In previous versions, most significant bits (MSBs) of the seed affect
// only MSBs of the state array. Modified 9 Jan 2002 by Makoto Matsumoto.
uint32 *s = state;
uint32 *r = state;
int i = 1;
*s++ = seed & 0xffffffffUL;
for( ; i < N; ++i )
{
*s++ = ( 1812433253UL * ( *r ^ (*r >> 30) ) + i ) & 0xffffffffUL;
r++;
}
}
void MTRand::reload()
{
// Generate N new values in state
// Made clearer and faster by Matthew Bellew (matthew.bellew@home.com)
uint32 *p = state;
int i;
for( i = N - M; i--; ++p )
*p = twist( p[M], p[0], p[1] );
for( i = M; --i; ++p )
*p = twist( p[M-N], p[0], p[1] );
*p = twist( p[M-N], p[0], state[0] );
left = N, next = state;
}

368
src/nvmath/Random.h
View File

@ -1,368 +0,0 @@
// This code is in the public domain -- castanyo@yahoo.es
#ifndef NV_MATH_RANDOM_H
#define NV_MATH_RANDOM_H
#include <nvcore/Containers.h> // nextPowerOfTwo
#include <nvmath/nvmath.h>
namespace nv
{
/// Interface of the random number generators.
class Rand
{
public:
virtual ~Rand() {}
enum time_e { Time };
/// Provide a new seed.
virtual void seed( uint s ) { /* empty */ };
/// Get an integer random number.
virtual uint get() = 0;
/// Get a random number on [0, max] interval.
uint getRange( uint max )
{
uint n;
// uint mask = Bitmask( max );
// do { n = Get() & mask; } while( n > max );
uint np2 = nextPowerOfTwo( max );
do { n = get() & (np2-1); } while( n > max );
return n;
}
/// Random number on [0.0, 1.0] interval.
float getFloat()
{
union
{
uint32 i;
float f;
} pun;
pun.i = 0x3f800000UL | (get() & 0x007fffffUL);
return pun.f - 1.0f;
}
/*
/// Random number on [0.0, 1.0] interval.
double getReal()
{
return double(get()) * (1.0/4294967295.0); // 2^32-1
}
/// Random number on [0.0, 1.0) interval.
double getRealExclusive()
{
return double(get()) * (1.0/4294967296.0); // 2^32
}
*/
/// Get the max value of the random number.
uint max() const { return 4294967295U; }
// Get a random seed.
static uint randomSeed();
};
/// Very simple random number generator with low storage requirements.
class SimpleRand : public Rand
{
public:
/// Constructor that uses the current time as the seed.
SimpleRand( time_e )
{
seed(randomSeed());
}
/// Constructor that uses the given seed.
SimpleRand( uint s = 0 )
{
seed(s);
}
/// Set the given seed.
virtual void seed( uint s )
{
current = s;
}
/// Get a random number.
virtual uint get()
{
return current = current * 1103515245 + 12345;
}
private:
uint current;
};
/// Mersenne twister random number generator.
class MTRand : public Rand
{
public:
enum { N = 624 }; // length of state vector
enum { M = 397 };
/// Constructor that uses the current time as the seed.
MTRand( time_e )
{
seed(randomSeed());
}
/// Constructor that uses the given seed.
MTRand( uint s = 0 )
{
seed(s);
}
/// Constructor that uses the given seeds.
NVMATH_API MTRand( const uint * seed_array, uint length );
/// Provide a new seed.
virtual void seed( uint s )
{
initialize(s);
reload();
}
/// Get a random number between 0 - 65536.
virtual uint get()
{
// Pull a 32-bit integer from the generator state
// Every other access function simply transforms the numbers extracted here
if( left == 0 ) {
reload();
}
left--;
uint s1;
s1 = *next++;
s1 ^= (s1 >> 11);
s1 ^= (s1 << 7) & 0x9d2c5680U;
s1 ^= (s1 << 15) & 0xefc60000U;
return ( s1 ^ (s1 >> 18) );
};
private:
NVMATH_API void initialize( uint32 seed );
NVMATH_API void reload();
uint hiBit( uint u ) const { return u & 0x80000000U; }
uint loBit( uint u ) const { return u & 0x00000001U; }
uint loBits( uint u ) const { return u & 0x7fffffffU; }
uint mixBits( uint u, uint v ) const { return hiBit(u) | loBits(v); }
uint twist( uint m, uint s0, uint s1 ) const { return m ^ (mixBits(s0,s1)>>1) ^ ((~loBit(s1)+1) & 0x9908b0dfU); }
private:
uint state[N]; // internal state
uint * next; // next value to get from state
int left; // number of values left before reload needed
};
/** George Marsaglia's random number generator.
* Code based on Thatcher Ulrich public domain source code:
* http://cvs.sourceforge.net/viewcvs.py/tu-testbed/tu-testbed/base/tu_random.cpp?rev=1.7&view=auto
*
* PRNG code adapted from the complimentary-multiply-with-carry
* code in the article: George Marsaglia, "Seeds for Random Number
* Generators", Communications of the ACM, May 2003, Vol 46 No 5,
* pp90-93.
*
* The article says:
*
* "Any one of the choices for seed table size and multiplier will
* provide a RNG that has passed extensive tests of randomness,
* particularly those in [3], yet is simple and fast --
* approximately 30 million random 32-bit integers per second on a
* 850MHz PC. The period is a*b^n, where a is the multiplier, n
* the size of the seed table and b=2^32-1. (a is chosen so that
* b is a primitive root of the prime a*b^n + 1.)"
*
* [3] Marsaglia, G., Zaman, A., and Tsang, W. Toward a universal
* random number generator. _Statistics and Probability Letters
* 8_ (1990), 35-39.
*/
class GMRand : public Rand
{
public:
enum { SEED_COUNT = 8 };
// const uint64 a = 123471786; // for SEED_COUNT=1024
// const uint64 a = 123554632; // for SEED_COUNT=512
// const uint64 a = 8001634; // for SEED_COUNT=255
// const uint64 a = 8007626; // for SEED_COUNT=128
// const uint64 a = 647535442; // for SEED_COUNT=64
// const uint64 a = 547416522; // for SEED_COUNT=32
// const uint64 a = 487198574; // for SEED_COUNT=16
// const uint64 a = 716514398U; // for SEED_COUNT=8
enum { a = 716514398U };
GMRand( time_e )
{
seed(randomSeed());
}
GMRand(uint s = 987654321)
{
seed(s);
}
/// Provide a new seed.
virtual void seed( uint s )
{
c = 362436;
i = SEED_COUNT - 1;
for(int i = 0; i < SEED_COUNT; i++) {
s = s ^ (s << 13);
s = s ^ (s >> 17);
s = s ^ (s << 5);
Q[i] = s;
}
}
/// Get a random number between 0 - 65536.
virtual uint get()
{
const uint32 r = 0xFFFFFFFE;
uint64 t;
uint32 x;
i = (i + 1) & (SEED_COUNT - 1);
t = a * Q[i] + c;
c = uint32(t >> 32);
x = uint32(t + c);
if( x < c ) {
x++;
c++;
}
uint32 val = r - x;
Q[i] = val;
return val;
};
private:
uint32 c;
uint32 i;
uint32 Q[8];
};
/** Random number implementation from the GNU Sci. Lib. (GSL).
* Adapted from Nicholas Chapman version:
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000 James Theiler, Brian Gough
* This is the Unix rand48() generator. The generator returns the
* upper 32 bits from each term of the sequence,
*
* x_{n+1} = (a x_n + c) mod m
*
* using 48-bit unsigned arithmetic, with a = 0x5DEECE66D , c = 0xB
* and m = 2^48. The seed specifies the upper 32 bits of the initial
* value, x_1, with the lower 16 bits set to 0x330E.
*
* The theoretical value of x_{10001} is 244131582646046.
*
* The period of this generator is ? FIXME (probably around 2^48).
*/
class Rand48 : public Rand
{
public:
Rand48( time_e )
{
seed(randomSeed());
}
Rand48( uint s = 0x1234ABCD )
{
seed(s);
}
/** Set the given seed. */
virtual void seed( uint s ) {
vstate.x0 = 0x330E;
vstate.x1 = uint16(s & 0xFFFF);
vstate.x2 = uint16((s >> 16) & 0xFFFF);
}
/** Get a random number. */
virtual uint get() {
advance();
uint x1 = vstate.x1;
uint x2 = vstate.x2;
return (x2 << 16) + x1;
}
private:
void advance()
{
/* work with unsigned long ints throughout to get correct integer
promotions of any unsigned short ints */
const uint32 x0 = vstate.x0;
const uint32 x1 = vstate.x1;
const uint32 x2 = vstate.x2;
uint32 a;
a = a0 * x0 + c0;
vstate.x0 = uint16(a & 0xFFFF);
a >>= 16;
/* although the next line may overflow we only need the top 16 bits
in the following stage, so it does not matter */
a += a0 * x1 + a1 * x0;
vstate.x1 = uint16(a & 0xFFFF);
a >>= 16;
a += a0 * x2 + a1 * x1 + a2 * x0;
vstate.x2 = uint16(a & 0xFFFF);
}
private:
NVMATH_API static const uint16 a0, a1, a2, c0;
struct rand48_state_t {
uint16 x0, x1, x2;
} vstate;
};
} // nv namespace
#endif // NV_MATH_RANDOM_H