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-// ==========================================================
-// Utility functions
-//
-// Design and implementation by
-// - Floris van den Berg (flvdberg@wxs.nl)
-// - Hervé Drolon <drolon@infonie.fr>
-// - Ryan Rubley (ryan@lostreality.org)
-//
-// This file is part of FreeImage 3
-//
-// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
-// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
-// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
-// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
-// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
-// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
-// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
-// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
-// THIS DISCLAIMER.
-//
-// Use at your own risk!
-// ==========================================================
-
-#ifndef UTILITIES_H
-#define UTILITIES_H
-
-// ==========================================================
-// Standard includes used by the library
-// ==========================================================
-
-#include <math.h>
-#include <stdlib.h>
-#include <memory.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdarg.h>
-#include <ctype.h>
-#include <assert.h>
-#include <errno.h>
-#include <float.h>
-#include <limits.h>
-
-#include <string>
-#include <list>
-#include <map>
-#include <set>
-#include <vector>
-#include <stack>
-#include <sstream>
-#include <algorithm>
-#include <limits>
-#include <memory>
-
-// ==========================================================
-// Bitmap palette and pixels alignment
-// ==========================================================
-
-#define FIBITMAP_ALIGNMENT 16 // We will use a 16 bytes alignment boundary
-
-// Memory allocation on a specified alignment boundary
-// defined in BitmapAccess.cpp
-
-void* FreeImage_Aligned_Malloc(size_t amount, size_t alignment);
-void FreeImage_Aligned_Free(void* mem);
-
-#if defined(__cplusplus)
-extern "C" {
-#endif
-
-/**
-Allocate a FIBITMAP with possibly no pixel data
-(i.e. only header data and some or all metadata)
-@param header_only If TRUE, allocate a 'header only' FIBITMAP, otherwise allocate a full FIBITMAP
-@param type Image type
-@param width
-@param height
-@param bpp
-@param red_mask
-@param green_mask
-@param blue_mask
-@see FreeImage_AllocateT
-*/
-DLL_API FIBITMAP * DLL_CALLCONV FreeImage_AllocateHeaderT(BOOL header_only, FREE_IMAGE_TYPE type, int width, int height, int bpp FI_DEFAULT(8), unsigned red_mask FI_DEFAULT(0), unsigned green_mask FI_DEFAULT(0), unsigned blue_mask FI_DEFAULT(0));
-
-/**
-Allocate a FIBITMAP of type FIT_BITMAP, with possibly no pixel data
-(i.e. only header data and some or all metadata)
-@param header_only If TRUE, allocate a 'header only' FIBITMAP, otherwise allocate a full FIBITMAP
-@param width
-@param height
-@param bpp
-@param red_mask
-@param green_mask
-@param blue_mask
-@see FreeImage_Allocate
-*/
-DLL_API FIBITMAP * DLL_CALLCONV FreeImage_AllocateHeader(BOOL header_only, int width, int height, int bpp, unsigned red_mask FI_DEFAULT(0), unsigned green_mask FI_DEFAULT(0), unsigned blue_mask FI_DEFAULT(0));
-
-#if defined(__cplusplus)
-}
-#endif
-
-
-// ==========================================================
-// File I/O structs
-// ==========================================================
-
-// these structs are for file I/O and should not be confused with similar
-// structs in FreeImage.h which are for in-memory bitmap handling
-
-#ifdef _WIN32
-#pragma pack(push, 1)
-#else
-#pragma pack(1)
-#endif // _WIN32
-
-typedef struct tagFILE_RGBA {
- unsigned char r,g,b,a;
-} FILE_RGBA;
-
-typedef struct tagFILE_BGRA {
- unsigned char b,g,r,a;
-} FILE_BGRA;
-
-typedef struct tagFILE_RGB {
- unsigned char r,g,b;
-} FILE_RGB;
-
-typedef struct tagFILE_BGR {
- unsigned char b,g,r;
-} FILE_BGR;
-
-#ifdef _WIN32
-#pragma pack(pop)
-#else
-#pragma pack()
-#endif // _WIN32
-
-// ==========================================================
-// Template utility functions
-// ==========================================================
-
-/// Max function
-template <class T> T MAX(const T &a, const T &b) {
- return (a > b) ? a: b;
-}
-
-/// Min function
-template <class T> T MIN(const T &a, const T &b) {
- return (a < b) ? a: b;
-}
-
-/// INPLACESWAP adopted from codeguru.com
-template <class T> void INPLACESWAP(T& a, T& b) {
- a ^= b; b ^= a; a ^= b;
-}
-
-/// Clamp function
-template <class T> T CLAMP(const T &value, const T &min_value, const T &max_value) {
- return ((value < min_value) ? min_value : (value > max_value) ? max_value : value);
-}
-
-/** This procedure computes minimum min and maximum max
- of n numbers using only (3n/2) - 2 comparisons.
- min = L[i1] and max = L[i2].
- ref: Aho A.V., Hopcroft J.E., Ullman J.D.,
- The design and analysis of computer algorithms,
- Addison-Wesley, Reading, 1974.
-*/
-template <class T> void
-MAXMIN(const T* L, long n, T& max, T& min) {
- long i1, i2, i, j;
- T x1, x2;
- long k1, k2;
-
- i1 = 0; i2 = 0; min = L[0]; max = L[0]; j = 0;
- if ((n % 2) != 0) j = 1;
- for(i = j; i < n; i+= 2) {
- k1 = i; k2 = i+1;
- x1 = L[k1]; x2 = L[k2];
- if(x1 > x2) {
- k1 = k2; k2 = i;
- x1 = x2; x2 = L[k2];
- }
- if(x1 < min) {
- min = x1; i1 = k1;
- }
- if(x2 > max) {
- max = x2; i2 = k2;
- }
- }
-}
-
-// ==========================================================
-// Utility functions
-// ==========================================================
-
-#ifndef _WIN32
-inline char*
-i2a(unsigned i, char *a, unsigned r) {
- if (i/r > 0) a = i2a(i/r,a,r);
- *a = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"[i%r];
- return a+1;
-}
-
-/**
- Transforms integer i into an ascii string and stores the result in a;
- string is encoded in the base indicated by r.
- @param i Number to be converted
- @param a String result
- @param r Base of value; must be in the range 2 - 36
- @return Returns a
-*/
-inline char *
-_itoa(int i, char *a, int r) {
- r = ((r < 2) || (r > 36)) ? 10 : r;
- if(i < 0) {
- *a = '-';
- *i2a(-i, a+1, r) = 0;
- }
- else *i2a(i, a, r) = 0;
- return a;
-}
-
-#endif // !_WIN32
-
-inline unsigned char
-HINIBBLE (unsigned char byte) {
- return byte & 0xF0;
-}
-
-inline unsigned char
-LOWNIBBLE (unsigned char byte) {
- return byte & 0x0F;
-}
-
-inline int
-CalculateUsedBits(int bits) {
- int bit_count = 0;
- unsigned bit = 1;
-
- for (unsigned i = 0; i < 32; i++) {
- if ((bits & bit) == bit) {
- bit_count++;
- }
-
- bit <<= 1;
- }
-
- return bit_count;
-}
-
-inline unsigned
-CalculateLine(unsigned width, unsigned bitdepth) {
- return (unsigned)( ((unsigned __int64)width * bitdepth + 7) / 8 );
-}
-
-inline unsigned
-CalculatePitch(unsigned line) {
- return line + 3 & ~3;
-}
-
-inline unsigned
-CalculateUsedPaletteEntries(unsigned bit_count) {
- if ((bit_count >= 1) && (bit_count <= 8))
- return 1 << bit_count;
-
- return 0;
-}
-
-inline unsigned char *
-CalculateScanLine(unsigned char *bits, unsigned pitch, int scanline) {
- return (bits + (pitch * scanline));
-}
-
-// ----------------------------------------------------------
-
-/**
-Fast generic assign (faster than for loop)
-@param dst Destination pixel
-@param src Source pixel
-@param bytesperpixel # of bytes per pixel
-*/
-inline void
-AssignPixel(BYTE* dst, const BYTE* src, unsigned bytesperpixel) {
- switch (bytesperpixel) {
- case 1: // FIT_BITMAP (8-bit)
- *dst = *src;
- break;
-
- case 2: // FIT_UINT16 / FIT_INT16 / 16-bit
- *(reinterpret_cast<WORD*>(dst)) = *(reinterpret_cast<const WORD*> (src));
- break;
-
- case 3: // FIT_BITMAP (24-bit)
- *(reinterpret_cast<WORD*>(dst)) = *(reinterpret_cast<const WORD*> (src));
- dst[2] = src[2];
- break;
-
- case 4: // FIT_BITMAP (32-bit) / FIT_UINT32 / FIT_INT32 / FIT_FLOAT
- *(reinterpret_cast<DWORD*>(dst)) = *(reinterpret_cast<const DWORD*> (src));
- break;
-
- case 6: // FIT_RGB16 (3 x 16-bit)
- *(reinterpret_cast<DWORD*>(dst)) = *(reinterpret_cast<const DWORD*> (src));
- *(reinterpret_cast<WORD*>(dst + 4)) = *(reinterpret_cast<const WORD*> (src + 4));
- break;
-
- // the rest can be speeded up with int64
-
- case 8: // FIT_RGBA16 (4 x 16-bit)
- *(reinterpret_cast<DWORD*>(dst)) = *(reinterpret_cast<const DWORD*> (src));
- *(reinterpret_cast<DWORD*>(dst + 4)) = *(reinterpret_cast<const DWORD*> (src + 4));
- break;
-
- case 12: // FIT_RGBF (3 x 32-bit IEEE floating point)
- *(reinterpret_cast<float*>(dst)) = *(reinterpret_cast<const float*> (src));
- *(reinterpret_cast<float*>(dst + 4)) = *(reinterpret_cast<const float*> (src + 4));
- *(reinterpret_cast<float*>(dst + 8)) = *(reinterpret_cast<const float*> (src + 8));
- break;
-
- case 16: // FIT_RGBAF (4 x 32-bit IEEE floating point)
- *(reinterpret_cast<float*>(dst)) = *(reinterpret_cast<const float*> (src));
- *(reinterpret_cast<float*>(dst + 4)) = *(reinterpret_cast<const float*> (src + 4));
- *(reinterpret_cast<float*>(dst + 8)) = *(reinterpret_cast<const float*> (src + 8));
- *(reinterpret_cast<float*>(dst + 12)) = *(reinterpret_cast<const float*> (src + 12));
- break;
-
- default:
- assert(FALSE);
- }
-}
-
-/**
-Swap red and blue channels in a 24- or 32-bit dib.
-@return Returns TRUE if successful, returns FALSE otherwise
-@see See definition in Conversion.cpp
-*/
-BOOL SwapRedBlue32(FIBITMAP* dib);
-
-/**
-Inplace convert CMYK to RGBA.(8- and 16-bit).
-Alpha is filled with the first extra channel if any or white otherwise.
-@return Returns TRUE if successful, returns FALSE otherwise
-@see See definition in Conversion.cpp
-*/
-BOOL ConvertCMYKtoRGBA(FIBITMAP* dib);
-
-/**
-Inplace convert CIELab to RGBA (8- and 16-bit).
-@return Returns TRUE if successful, returns FALSE otherwise
-@see See definition in Conversion.cpp
-*/
-BOOL ConvertLABtoRGB(FIBITMAP* dib);
-
-/**
-RGBA to RGB conversion
-@see See definition in Conversion.cpp
-*/
-FIBITMAP* RemoveAlphaChannel(FIBITMAP* dib);
-
-
-// ==========================================================
-// Big Endian / Little Endian utility functions
-// ==========================================================
-
-inline WORD
-__SwapUInt16(WORD arg) {
-#if defined(_MSC_VER) && _MSC_VER >= 1310
- return _byteswap_ushort(arg);
-#elif defined(__i386__) && defined(__GNUC__)
- __asm__("xchgb %b0, %h0" : "+q" (arg));
- return arg;
-#elif defined(__ppc__) && defined(__GNUC__)
- WORD result;
- __asm__("lhbrx %0,0,%1" : "=r" (result) : "r" (&arg), "m" (arg));
- return result;
-#else
- // swap bytes
- WORD result;
- result = ((arg << 8) & 0xFF00) | ((arg >> 8) & 0x00FF);
- return result;
-#endif
-}
-
-inline DWORD
-__SwapUInt32(DWORD arg) {
-#if defined(_MSC_VER) && _MSC_VER >= 1310
- return _byteswap_ulong(arg);
-#elif defined(__i386__) && defined(__GNUC__)
- __asm__("bswap %0" : "+r" (arg));
- return arg;
-#elif defined(__ppc__) && defined(__GNUC__)
- DWORD result;
- __asm__("lwbrx %0,0,%1" : "=r" (result) : "r" (&arg), "m" (arg));
- return result;
-#else
- // swap words then bytes
- DWORD result;
- result = ((arg & 0x000000FF) << 24) | ((arg & 0x0000FF00) << 8) | ((arg >> 8) & 0x0000FF00) | ((arg >> 24) & 0x000000FF);
- return result;
-#endif
-}
-
-/**
-for later use ...
-inline uint64_t
-SwapInt64(uint64_t arg) {
-#if defined(_MSC_VER) && _MSC_VER >= 1310
- return _byteswap_uint64(arg);
-#else
- union Swap {
- uint64_t sv;
- uint32_t ul[2];
- } tmp, result;
- tmp.sv = arg;
- result.ul[0] = SwapInt32(tmp.ul[1]);
- result.ul[1] = SwapInt32(tmp.ul[0]);
- return result.sv;
-#endif
-}
-*/
-
-inline void
-SwapShort(WORD *sp) {
- *sp = __SwapUInt16(*sp);
-}
-
-inline void
-SwapLong(DWORD *lp) {
- *lp = __SwapUInt32(*lp);
-}
-
-// ==========================================================
-// Greyscale and color conversion
-// ==========================================================
-
-/**
-Extract the luminance channel L from a RGBF image.
-Luminance is calculated from the sRGB model using a D65 white point, using the Rec.709 formula :
-L = ( 0.2126 * r ) + ( 0.7152 * g ) + ( 0.0722 * b )
-Reference :
-A Standard Default Color Space for the Internet - sRGB.
-[online] http://www.w3.org/Graphics/Color/sRGB
-*/
-#define LUMA_REC709(r, g, b) (0.2126F * r + 0.7152F * g + 0.0722F * b)
-
-#define GREY(r, g, b) (BYTE)LUMA_REC709(r, g, b)
-/*
-#define GREY(r, g, b) (BYTE)(((WORD)r * 77 + (WORD)g * 150 + (WORD)b * 29) >> 8) // .299R + .587G + .114B
-*/
-/*
-#define GREY(r, g, b) (BYTE)(((WORD)r * 169 + (WORD)g * 256 + (WORD)b * 87) >> 9) // .33R + 0.5G + .17B
-*/
-
-#define RGB565(b, g, r) ((((b) >> 3) << FI16_565_BLUE_SHIFT) | (((g) >> 2) << FI16_565_GREEN_SHIFT) | (((r) >> 3) << FI16_565_RED_SHIFT))
-#define RGB555(b, g, r) ((((b) >> 3) << FI16_555_BLUE_SHIFT) | (((g) >> 3) << FI16_555_GREEN_SHIFT) | (((r) >> 3) << FI16_555_RED_SHIFT))
-
-#define FORMAT_RGB565(dib) ((FreeImage_GetRedMask(dib) == FI16_565_RED_MASK) &&(FreeImage_GetGreenMask(dib) == FI16_565_GREEN_MASK) &&(FreeImage_GetBlueMask(dib) == FI16_565_BLUE_MASK))
-#define RGBQUAD_TO_WORD(dib, color) (FORMAT_RGB565(dib) ? RGB565((color)->rgbBlue, (color)->rgbGreen, (color)->rgbRed) : RGB555((color)->rgbBlue, (color)->rgbGreen, (color)->rgbRed))
-
-#define CREATE_GREYSCALE_PALETTE(palette, entries) \
- for (unsigned i = 0, v = 0; i < entries; i++, v += 0x00FFFFFF / (entries - 1)) { \
- ((unsigned *)palette)[i] = v; \
- }
-
-#define CREATE_GREYSCALE_PALETTE_REVERSE(palette, entries) \
- for (unsigned i = 0, v = 0x00FFFFFF; i < entries; i++, v -= (0x00FFFFFF / (entries - 1))) { \
- ((unsigned *)palette)[i] = v; \
- }
-
-// ==========================================================
-// Generic error messages
-// ==========================================================
-
-static const char *FI_MSG_ERROR_MEMORY = "Memory allocation failed";
-static const char *FI_MSG_ERROR_DIB_MEMORY = "DIB allocation failed, maybe caused by an invalid image size or by a lack of memory";
-static const char *FI_MSG_ERROR_PARSING = "Parsing error";
-static const char *FI_MSG_ERROR_MAGIC_NUMBER = "Invalid magic number";
-static const char *FI_MSG_ERROR_UNSUPPORTED_FORMAT = "Unsupported format";
-static const char *FI_MSG_ERROR_UNSUPPORTED_COMPRESSION = "Unsupported compression type";
-static const char *FI_MSG_WARNING_INVALID_THUMBNAIL = "Warning: attached thumbnail cannot be written to output file (invalid format) - Thumbnail saving aborted";
-
-#endif // UTILITIES_H
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