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// This code contains NVIDIA Confidential Information and is disclosed to you
// under a form of NVIDIA software license agreement provided separately to you.
//
// Notice
// NVIDIA Corporation and its licensors retain all intellectual property and
// proprietary rights in and to this software and related documentation and
// any modifications thereto. Any use, reproduction, disclosure, or
// distribution of this software and related documentation without an express
// license agreement from NVIDIA Corporation is strictly prohibited.
//
// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
//
// Information and code furnished is believed to be accurate and reliable.
// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
// information or for any infringement of patents or other rights of third parties that may
// result from its use. No license is granted by implication or otherwise under any patent
// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
// This code supersedes and replaces all information previously supplied.
// NVIDIA Corporation products are not authorized for use as critical
// components in life support devices or systems without express written approval of
// NVIDIA Corporation.
//
// Copyright (c) 2008-2017 NVIDIA Corporation. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "PxTkBmpLoader.h"
#include "PxTkFile.h"
using namespace PxToolkit;
#define MAKETWOCC(a,b) ( (static_cast<char>(a)) | ((static_cast<char>(b))<< 8) )
static bool isBigEndian() { int i = 1; return *(reinterpret_cast<char*>(&i))==0; }
static unsigned short endianSwap(unsigned short nValue)
{
return (((nValue>> 8)) | (nValue << 8));
}
static unsigned int endianSwap(unsigned int i)
{
unsigned char b1, b2, b3, b4;
b1 = i & 255;
b2 = ( i >> 8 ) & 255;
b3 = ( i>>16 ) & 255;
b4 = ( i>>24 ) & 255;
return (static_cast<unsigned int>(b1) << 24) + (static_cast<unsigned int>(b2) << 16) + (static_cast<unsigned int>(b3) << 8) + b4;
}
// -------------------------------------------------------------------
#pragma pack(1)
struct BMPHEADER {
unsigned short Type;
unsigned int Size;
unsigned short Reserved1;
unsigned short Reserved2;
unsigned int OffBits;
};
// Only Win3.0 BMPINFO (see later for OS/2)
struct BMPINFO {
unsigned int Size;
unsigned int Width;
unsigned int Height;
unsigned short Planes;
unsigned short BitCount;
unsigned int Compression;
unsigned int SizeImage;
unsigned int XPelsPerMeter;
unsigned int YPelsPerMeter;
unsigned int ClrUsed;
unsigned int ClrImportant;
};
#pragma pack()
// Compression Type
#define BI_RGB 0L
#define BI_RLE8 1L
#define BI_RLE4 2L
// -------------------------------------------------------------------
BmpLoader::BmpLoader() :
mWidth (0),
mHeight (0),
mRGB (NULL),
mHasAlpha (false)
{
}
// -------------------------------------------------------------------
BmpLoader::~BmpLoader()
{
if (mRGB) free(mRGB);
}
// -------------------------------------------------------------------
bool BmpLoader::loadBmp(PxFileHandle f)
{
if (!f) return false;
if (mRGB) {
free(mRGB);
mRGB = NULL;
}
mWidth = 0;
mHeight = 0;
size_t num;
BMPHEADER header;
num = fread(&header, 1, sizeof(BMPHEADER), f);
if(isBigEndian()) header.Type = endianSwap(header.Type);
if (num != sizeof(BMPHEADER)) { fclose(f); return false; }
if (header.Type != MAKETWOCC('B','M')) { fclose(f); return false; }
BMPINFO info;
num = fread(&info, 1, sizeof(BMPINFO), f);
if (num != sizeof(BMPINFO)) { fclose(f); return false; }
if(isBigEndian()) info.Size = endianSwap(info.Size);
if(isBigEndian()) info.BitCount = endianSwap(info.BitCount);
if(isBigEndian()) info.Compression = endianSwap(info.Compression);
if(isBigEndian()) info.Width = endianSwap(info.Width);
if(isBigEndian()) info.Height = endianSwap(info.Height);
if (info.Size != sizeof(BMPINFO)) { fclose(f); return false; }
if (info.BitCount != 24 && info.BitCount != 32) { fclose(f); return false; }
if (info.Compression != BI_RGB) { fclose(f); return false; }
mWidth = info.Width;
mHeight = info.Height;
int bytesPerPixel = 0;
if(info.BitCount == 24)
{
mHasAlpha = false;
bytesPerPixel = 3;
}
else if(info.BitCount == 32)
{
mHasAlpha = true;
bytesPerPixel = 4;
}
else assert(0);
mRGB = static_cast<unsigned char*>(malloc(mWidth * mHeight * bytesPerPixel));
int lineLen = (((info.Width * (info.BitCount>>3)) + 3)>>2)<<2;
unsigned char* line = static_cast<unsigned char*>(malloc(lineLen));
for(int i = info.Height-1; i >= 0; i--)
{
num = fread(line, 1, static_cast<size_t>(lineLen), f);
if (num != static_cast<size_t>(lineLen)) { fclose(f); return false; }
unsigned char* src = line;
unsigned char* dest = mRGB + i*info.Width*bytesPerPixel;
for(unsigned int j = 0; j < info.Width; j++)
{
unsigned char b = *src++;
unsigned char g = *src++;
unsigned char r = *src++;
unsigned char a = mHasAlpha ? *src++ : 0;
*dest++ = r;
*dest++ = g;
*dest++ = b;
if(mHasAlpha)
*dest++ = a;
}
}
free(line);
return true;
}
// -------------------------------------------------------------------
bool BmpLoader::loadBmp(const char *filename)
{
PxFileHandle f = NULL;
PxToolkit::fopen_s(&f, filename, "rb");
bool ret = loadBmp(f);
if(f) fclose(f);
return ret;
}
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