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Changeset 3365 in orxonox.OLD for orxonox/trunk/src/importer/material.cc


Ignore:
Timestamp:
Jan 7, 2005, 1:14:33 AM (19 years ago)
Author:
bensch
Message:

orxonox/trunk: merged branches/parenting back to the.
merged with command:
svn merge branches/parenting trunk -r 3247:HEAD
resolved all conflicts in favor of parenting.

File:
1 edited

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  • orxonox/trunk/src/importer/material.cc

    r3208 r3365  
    1313   co-programmer: ...
    1414
    15    TGA-code: borrowed from nehe-Tutorials
    16 
    1715*/
    1816
    1917#include "material.h"
    2018
    21 // headers only for PathList
    22 #include <unistd.h>
    23 #include <sys/types.h>
    24 #include <sys/stat.h>
    25 #include <stdlib.h>
    26 #include <fstream>
    27 
    2819using namespace std;
    2920
    30 /**
    31    \brief creates a ned PathList.
    32    
    33    It is a good idea to use this as an initial List,
    34    because if you give on a name the Path will not be checked for its existence.
    35 */
    36 PathList::PathList()
    37 {
    38   this->pathName = NULL;
    39   this->next = NULL;
    40 }
    41 
    42 /**
    43    \brief Creates a new PathList with a Name.
    44    \param pName the Name of The Path.
    45 
    46    This function just adds the Path without checking if it exists.
    47 */
    48 PathList::PathList(char* pName)
    49 {
    50   this->pathName = new char [strlen(pName)+1];
    51   strcpy (this->pathName, pName);
    52   this->next = NULL;
    53 }
    54 
    55 /**
    56    \brief destroys a PathList
    57 
    58    It does this by deleting the Name and then delete its preceding PathList.
    59 */
    60 PathList::~PathList()
    61 {
    62   if (this->pathName)
    63     delete []this->pathName;
    64   if (this->next)
    65     delete this->next;
    66 }
    67 
    68 /**
    69    \brief Adds a new Pathlist Element.
    70    \param pName
    71    
    72    Adding a Path automatically checks if the Path exists,
    73    and if it does not it will not add it to the List.
    74 */
    75 void PathList::addPath (char* pName)
    76 {
    77   if (pName[0] == '\0')
    78     {
    79       PRINTF(3)("not Adding empty Path to the List.\n");
    80       return;
    81     }
    82   char* tmpPName = new char[strlen(pName)];
    83   strncpy(tmpPName, pName, strlen(pName)-1);
    84   tmpPName[strlen(pName)-1] = '\0';
    85   if (access (tmpPName, F_OK) == 0)
    86     {
    87       struct stat status;
    88       stat(tmpPName, &status);
    89       if (status.st_mode & S_IFDIR)
    90         {
    91           PRINTF(2)("Adding Path %s to the PathList.\n", pName);
    92           PathList* tmpPathList = this;
    93           while (tmpPathList->next)
    94             tmpPathList = tmpPathList->next;
    95           tmpPathList->next = new PathList(pName);
    96         }
    97       else
    98         PRINTF(2)("You tried to add non-folder %s to a PathList.\n", tmpPName);
    99     }
    100   else
    101       PRINTF(2)("You tried to add non-existing folder %s to a PathList.\n", tmpPName);
    102   delete []tmpPName;
    103 }
    10421
    10522/**
    … …  
    13350  if (this->name)
    13451    delete []this->name;
    135   if (this->diffuseTextureSet)
    136     glDeleteTextures (1, &this->diffuseTexture);
     52  if (this->diffuseTexture)
     53    this->diffuseTexture;
    13754  if (this->nextMat)
    13855    delete this->nextMat;
    … …  
    17289  this->setTransparency(0.0);
    17390
    174   if (!this->pathList)
    175     this->pathList = new PathList("");
    176 
     91
     92  this->diffuseTexture = NULL;
     93  this->ambientTexture = NULL;
     94  this->specularTexture = NULL;
    17795
    17896  this->diffuseTextureSet = false;
    … …  
    182100 
    183101}
    184 
    185 PathList *Material::pathList = NULL;
    186102
    187103/**
    … …  
    233149
    234150  if (this->diffuseTextureSet)
    235     glBindTexture(GL_TEXTURE_2D, this->diffuseTexture);
     151    glBindTexture(GL_TEXTURE_2D, this->diffuseTexture->getTexture());
    236152  else
    237153    glBindTexture(GL_TEXTURE_2D, 0);
    … …  
    394310void Material::addTexturePath(char* pathName)
    395311{
    396   this->pathList->addPath (pathName);
    397 }
    398 
    399 /**
    400    \brief Searches for a Texture inside one of the defined Paths
    401    \param texName The name of the texture o search for.
    402    \returns pathName+texName if texName was found in the pathList. NULL if the Texture is not found.
    403 */
    404 char* Material::searchTextureInPaths(char* texName) const
    405 {
    406   char* tmpName = NULL;
    407   PathList* pList = pathList;
    408   while (pList)
    409     {
    410       if (pList->pathName)
    411         {
    412           tmpName = new char [strlen(pList->pathName)+strlen(texName)+1];
    413           strcpy(tmpName, pList->pathName);
    414         }
    415       else
    416         {
    417           tmpName = new char [strlen(texName)+1];
    418           tmpName[0]='\0';
    419         }
    420       strcat(tmpName, texName);
    421       if (access (tmpName, F_OK) == 0)
    422         return tmpName;
    423      
    424       if (tmpName)
    425         delete []tmpName;
    426       tmpName = NULL;
    427       pList = pList->next;
    428     }
    429   return NULL;
    430 }
    431 
     312  PathList::getInstance()->addPath(pathName);
     313}
    432314
    433315// MAPPING //
    … …  
    440322{
    441323  PRINTF(3)("setting Diffuse Map %s\n", dMap);
    442 
    443   //  diffuseTextureSet = loadBMP(dMap, &diffuseTexture);
    444   this->diffuseTextureSet = this->loadImage(dMap, &this->diffuseTexture);
     324  diffuseTexture = new Texture();
     325  this->diffuseTextureSet = diffuseTexture->loadImage(dMap);
    445326
    446327}
    … …  
    477358
    478359}
    479 
    480 /**
    481    \brief Loads a Texture to the openGL-environment.
    482    \param pImage The Image to load to openGL
    483    \param texture The Texture to apply it to.
    484 */
    485 bool Material::loadTexToGL (Image* pImage, GLuint* texture)
    486 {
    487   PRINTF(2)("Loading texture to OpenGL-Environment.\n");
    488   glGenTextures(1, texture);
    489   glBindTexture(GL_TEXTURE_2D, *texture);
    490   /* not Working, and not needed.
    491   glTexImage2D( GL_TEXTURE_2D, 0, 3, width,
    492                 height, 0, GL_BGR,
    493                 GL_UNSIGNED_BYTE, map->pixels );
    494   */
    495   gluBuild2DMipmaps(GL_TEXTURE_2D, 3, pImage->width, pImage->height, GL_RGB, GL_UNSIGNED_BYTE, pImage->data);
    496  
    497   glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
    498   glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR_MIPMAP_LINEAR);
    499 }
    500 
    501 
    502 #ifdef HAVE_SDL_SDL_IMAGE_H
    503 bool Material::loadImage(char* imageName, GLuint* texture)
    504 {
    505   char* imgNameWithPath = searchTextureInPaths(imageName);
    506   if (imgNameWithPath)
    507     {
    508       SDL_Surface* map;
    509       Image* pImage = new Image;
    510       map=IMG_Load(imgNameWithPath);
    511       if(!map)
    512         {
    513           PRINTF(1)("IMG_Load: %s\n", IMG_GetError());
    514           return false;
    515         }
    516       pImage->height = map->h;
    517       pImage->width  = map->w;
    518       pImage->data   = (GLubyte*)map->pixels;
    519       if( !IMG_isPNG(SDL_RWFromFile(imgNameWithPath, "rb")) && !IMG_isJPG(SDL_RWFromFile(imgNameWithPath, "rb")))
    520         for (int i=0;i<map->h * map->w *3;i+=3)
    521           {
    522             GLuint temp = pImage->data[i];
    523             pImage->data[i] = pImage->data[i+2];
    524             pImage->data[i+2] = temp;
    525           }
    526       this->loadTexToGL (pImage, texture);
    527     }
    528   else
    529     {
    530       PRINTF(1)("Image not Found: %s\n", imgNameWithPath);
    531       return false;
    532     }
    533 }
    534 
    535 
    536 #else /* HAVE_SDL_SDL_IMAGE_H */
    537 /**
    538    \brief Makes the Programm ready to Read-in a texture-File
    539    1. Checks what type of Image should be imported
    540    2. ToDO: Checks where to find the Image
    541 */
    542 bool Material::loadImage(char* imageName, GLuint* texture)
    543 {
    544   char* imgNameWithPath = searchTextureInPaths(imageName);
    545   if (imgNameWithPath)
    546     {
    547       if (!strncmp(imgNameWithPath+strlen(imgNameWithPath)-4, ".bmp", 4))
    548         {
    549           PRINTF(3)("Requested bmp-image. Trying to Import.\n");
    550           return this->loadBMP(imgNameWithPath, texture);
    551         }
    552      
    553       else if (!strncmp(imgNameWithPath+strlen(imgNameWithPath)-4, ".jpg", 4) || !strncmp(imgNameWithPath+strlen(imgNameWithPath)-5, ".jpg", 5))
    554         {
    555           PRINTF(3)("Requested jpeg-image. Trying to Import\n");
    556           return this->loadJPG(imgNameWithPath, texture);
    557         }
    558       else if (!strncmp(imgNameWithPath+strlen(imgNameWithPath)-4, ".tga", 4))
    559         {
    560           PRINTF(3)("Requested tga-image. Trying to Import\n");
    561           return this->loadTGA(imgNameWithPath, texture);
    562         }
    563       else if (!strncmp(imgNameWithPath+strlen(imgNameWithPath)-4, ".png", 4))
    564         {
    565           PRINTF(3)("Requested png-image. Trying to Import\n");
    566           return this->loadPNG(imgNameWithPath, texture);
    567         }
    568       else
    569         {
    570           PRINTF(1)("Requested Image was not recognized in its type. (Maybe a type-Cast-error.)\n FileName: %s", imgNameWithPath);
    571           return false;
    572         }
    573     }
    574   else
    575     {
    576       PRINTF(1)("Image not Found: %s\n", imgNameWithPath);
    577       return false;
    578     }
    579 }
    580 
    581 /**
    582    \brief reads in a Windows BMP-file, and imports it to openGL.
    583    \param bmpName The name of the Image to load.
    584    \param texture A pointer to the Texture which should be read to.
    585 */
    586 bool Material::loadBMP (char* bmpName, GLuint* texture)
    587 {
    588   Image* pImage = new Image;
    589   FILE *file;
    590   unsigned long size;                 // size of the image in bytes.
    591   unsigned long i;                    // standard counter.
    592   unsigned short int planes;          // number of planes in image (must be 1)
    593   unsigned short int bpp;             // number of bits per pixel (must be 24)
    594   GLuint temp;                          // temporary color storage for bgr-rgb conversion.
    595 
    596   // make sure the file is there.
    597   if ((file = fopen(bmpName, "rb"))==NULL)
    598     {
    599       PRINTF(1)("File Not Found : %s\n",bmpName);
    600       return false;
    601     }
    602   // seek through the bmp header, up to the width/height:
    603   fseek(file, 18, SEEK_CUR);
    604  
    605   // read the width
    606   if ((i = fread(&pImage->width, 4, 1, file)) != 1)
    607     {
    608       PRINTF(1)("Error reading width from %s.\n", bmpName);
    609       return false;
    610     }
    611   // read the height
    612   if ((i = fread(&pImage->height, 4, 1, file)) != 1)
    613     {
    614       PRINTF(1)("Error reading height from %s.\n", bmpName);
    615       return false;
    616     }
    617  
    618   // calculate the size (assuming 24 bits or 3 bytes per pixel).
    619   size = pImage->width * pImage->height * 3;
    620  
    621   // read the planes
    622   if ((fread(&planes, 2, 1, file)) != 1)
    623     {
    624       PRINTF(1)("Error reading planes from %s.\n", bmpName);
    625       return false;
    626     }
    627   if (planes != 1)
    628     {
    629       PRINTF(1)("Planes from %s is not 1: %u\n", bmpName, planes);
    630       return false;
    631     }
    632  
    633   // read the bpp
    634   if ((i = fread(&bpp, 2, 1, file)) != 1)
    635     {
    636       PRINTF(1)("Error reading bpp from %s.\n", bmpName);
    637       return false;
    638     }
    639   if (bpp != 24)
    640     {
    641       PRINTF(1)("Bpp from %s is not 24: %u\n", bmpName, bpp);
    642       return false;
    643     }
    644  
    645   // seek past the rest of the bitmap header.
    646   fseek(file, 24, SEEK_CUR);
    647  
    648   // read the data.
    649   pImage->data = (GLubyte *) malloc(size);
    650   if (pImage->data == NULL)
    651     {
    652       PRINTF(1)("Error allocating memory for color-corrected image data");
    653       return false;     
    654     }
    655  
    656   if ((i = fread(pImage->data, size, 1, file)) != 1)
    657     {
    658       PRINTF(1)("Error reading image data from %s.\n", bmpName);
    659       return false;
    660     }
    661   fclose(file);
    662 
    663   // reverse all of the colors. (bgr -> rgb)
    664   for (i=0;i<size;i+=3)
    665     {
    666       temp = pImage->data[i];
    667       pImage->data[i] = pImage->data[i+2];
    668       pImage->data[i+2] = temp;
    669     }
    670   this->loadTexToGL (pImage, texture);
    671  
    672 
    673   if (pImage)
    674     {
    675       if (pImage->data)
    676         {
    677           free(pImage->data);
    678         }
    679      
    680       free(pImage);
    681     }
    682   return true;
    683 
    684 }
    685 
    686 /**
    687    \brief reads in a jpg-file
    688    \param jpgName the Name of the Image to load
    689    \param texture a reference to the Texture to write the image to
    690 */
    691 bool Material::loadJPG (char* jpgName, GLuint* texture)
    692 {
    693 #ifdef HAVE_JPEGLIB_H
    694   struct jpeg_decompress_struct cinfo;
    695   Image *pImage = NULL;
    696   FILE *pFile;
    697  
    698   // Open a file pointer to the jpeg file and check if it was found and opened
    699   if((pFile = fopen(jpgName, "rb")) == NULL)
    700     {
    701       // Display an error message saying the file was not found, then return NULL
    702       PRINTF(1)("Unable to load JPG File %s.\n", jpgName);
    703       return false;
    704     }
    705  
    706   // Create an error handler
    707   jpeg_error_mgr jerr;
    708  
    709   // Have our compression info object point to the error handler address
    710   cinfo.err = jpeg_std_error(&jerr);
    711  
    712   // Initialize the decompression object
    713   jpeg_create_decompress(&cinfo);
    714  
    715   // Specify the data source (Our file pointer)
    716   jpeg_stdio_src(&cinfo, pFile);
    717  
    718   // Allocate the structure that will hold our eventual jpeg data (must free it!)
    719   pImage = (Image*)malloc(sizeof(Image));
    720  
    721   // DECOFING
    722   // Read in the header of the jpeg file
    723   jpeg_read_header(&cinfo, TRUE);
    724  
    725   // Start to decompress the jpeg file with our compression info
    726   jpeg_start_decompress(&cinfo);
    727  
    728   // Get the image dimensions and row span to read in the pixel data
    729   pImage->rowSpan = cinfo.image_width * cinfo.num_components;
    730   pImage->width   = cinfo.image_width;
    731   pImage->height   = cinfo.image_height;
    732  
    733   // Allocate memory for the pixel buffer
    734   pImage->data = new unsigned char[pImage->rowSpan * pImage->height];
    735  
    736   // Here we use the library's state variable cinfo.output_scanline as the
    737   // loop counter, so that we don't have to keep track ourselves.
    738  
    739   // Create an array of row pointers
    740   unsigned char** rowPtr = new unsigned char*[pImage->height];
    741   for (int i = 0; i < pImage->height; i++)
    742     rowPtr[i] = &(pImage->data[i*pImage->rowSpan]);
    743  
    744   // Now comes the juice of our work, here we extract all the pixel data
    745   int rowsRead = 0;
    746   while (cinfo.output_scanline < cinfo.output_height)
    747     {
    748       // Read in the current row of pixels and increase the rowsRead count
    749       rowsRead += jpeg_read_scanlines(&cinfo, &rowPtr[rowsRead], cinfo.output_height - rowsRead);
    750     }
    751  
    752   // Delete the temporary row pointers
    753   delete [] rowPtr;
    754  
    755   // Finish decompressing the data
    756   jpeg_finish_decompress(&cinfo);//  decodeJPG(&cinfo, pImage);
    757  
    758   // This releases all the stored memory for reading and decoding the jpeg
    759   jpeg_destroy_decompress(&cinfo);
    760  
    761   // Close the file pointer that opened the file
    762   fclose(pFile);
    763  
    764 
    765   if(pImage == NULL)
    766     exit(0);
    767  
    768   this->loadTexToGL (pImage, texture);
    769   if (pImage)
    770     {
    771       if (pImage->data)
    772         {
    773           free(pImage->data);
    774         }
    775      
    776       free(pImage);
    777     }
    778   return true;
    779 #else /* HAVE_JPEGLIB_H */
    780   PRINTF(1)("sorry, but you did not compile with jpeg-support.\nEither install SDL_image or jpeglib, and recompile to see the image\n");
    781   return false;
    782 #endif /* HAVE_JPEGLIB_H */
    783 
    784 }
    785 
    786 /**
    787    \brief reads in a tga-file
    788    \param tgaName the Name of the Image to load
    789    \param texture a reference to the Texture to write the image to
    790 */
    791 bool Material::loadTGA(const char * tgaName, GLuint* texture)
    792 {
    793   typedef struct
    794   {
    795     GLubyte Header[12];
    796   } TGAHeader;
    797   TGAHeader tgaHeader;                 
    798  
    799   GLubyte uTGAcompare[12] = {0,0,2, 0,0,0,0,0,0,0,0,0}; // Uncompressed TGA Header
    800   GLubyte cTGAcompare[12] = {0,0,10,0,0,0,0,0,0,0,0,0}; // Compressed TGA Header
    801   FILE * fTGA;
    802   fTGA = fopen(tgaName, "rb");
    803 
    804   if(fTGA == NULL)
    805     {
    806       PRINTF(1)("Error could not open texture file: %s\n", tgaName);
    807       return false;
    808     }
    809  
    810   if(fread(&tgaHeader, sizeof(TGAHeader), 1, fTGA) == 0)
    811     {
    812       PRINTF(1)("Error could not read file header of %s\n", tgaName);
    813       if(fTGA != NULL)
    814         {
    815           fclose(fTGA);
    816         }
    817       return false;
    818     }
    819  
    820   if(memcmp(uTGAcompare, &tgaHeader, sizeof(TGAHeader)) == 0)
    821     {
    822       loadUncompressedTGA(tgaName, fTGA, texture);
    823       if (fTGA)
    824         fclose (fTGA);
    825     }
    826   else if(memcmp(cTGAcompare, &tgaHeader, sizeof(TGAHeader)) == 0)
    827     {
    828       loadCompressedTGA(tgaName, fTGA, texture);
    829         if (fTGA)
    830           fclose (fTGA);
    831     }
    832   else
    833     {
    834       PRINTF(1)("Error TGA file be type 2 or type 10\n");
    835       if (fTGA)
    836         fclose(fTGA);
    837       return false;
    838     }
    839   return true;
    840 }
    841 
    842 /**
    843    \brief reads in an uncompressed tga-file
    844    \param filename the Name of the Image to load
    845    \param fTGA a Pointer to a File, that should be read
    846    \param texture a reference to the Texture to write the image to
    847 */
    848 bool Material::loadUncompressedTGA(const char * filename, FILE * fTGA, GLuint* texture)
    849 {
    850   GLubyte header[6];      // First 6 Useful Bytes From The Header
    851   GLuint  bytesPerPixel;  // Holds Number Of Bytes Per Pixel Used In The TGA File
    852   GLuint  imageSize;      // Used To Store The Image Size When Setting Aside Ram
    853   GLuint  temp;           // Temporary Variable
    854   GLuint  type;
    855   GLuint  Height;         // Height of Image
    856   GLuint  Width;          // Width of Image
    857   GLuint  Bpp;            // Bits Per Pixel
    858 
    859   Image* pImage = new Image;
    860   GLuint cswap;
    861   if(fread(header, sizeof(header), 1, fTGA) == 0)
    862     {
    863       PRINTF(1)("Error could not read info header\n");
    864       return false;
    865     }
    866  
    867   Width = pImage->width  = header[1] * 256 + header[0];
    868   Height =  pImage->height = header[3] * 256 + header[2];
    869   Bpp = pImage->bpp = header[4];
    870   // Make sure all information is valid
    871   if((pImage->width <= 0) || (pImage->height <= 0) || ((pImage->bpp != 24) && (pImage->bpp !=32)))
    872     {
    873       PRINTF(1)("Error invalid texture information\n");
    874       return false;
    875     }
    876  
    877   if(pImage->bpp == 24)
    878     {
    879       pImage->type = GL_RGB;
    880     }
    881   else
    882     {
    883       pImage->type = GL_RGBA;
    884     }
    885  
    886   bytesPerPixel = (Bpp / 8);
    887   imageSize = (bytesPerPixel * Width * Height);
    888   pImage->data = (GLubyte*) malloc(imageSize);
    889  
    890   if(pImage->data == NULL)
    891     {
    892       PRINTF(1)("Error could not allocate memory for image\n");
    893       return false;
    894     }
    895  
    896   if(fread(pImage->data, 1, imageSize, fTGA) != imageSize)
    897     {
    898       PRINTF(1)("Error could not read image data\n");
    899       if(pImage->data != NULL)
    900         {
    901           free(pImage->data);
    902         }
    903       return false;
    904     }
    905  
    906   for(cswap = 0; cswap < (int)imageSize; cswap += bytesPerPixel)
    907     {
    908       pImage->data[cswap] ^= pImage->data[cswap+2] ^=
    909         pImage->data[cswap] ^= pImage->data[cswap+2];
    910     }
    911  
    912   this->loadTexToGL (pImage, texture);
    913 
    914   return true;
    915 }
    916 
    917 /**
    918    \brief reads in a compressed tga-file
    919    \param filename the Name of the Image to load
    920    \param fTGA a Pointer to a File, that should be read
    921    \param texture a reference to the Texture to write the image to
    922 */
    923 bool Material::loadCompressedTGA(const char * filename, FILE * fTGA, GLuint* texture)
    924 {
    925   GLubyte header[6];      // First 6 Useful Bytes From The Header
    926   GLuint  bytesPerPixel;  // Holds Number Of Bytes Per Pixel Used In The TGA File
    927   GLuint  imageSize;      // Used To Store The Image Size When Setting Aside Ram
    928   GLuint  temp;           // Temporary Variable
    929   GLuint  type;
    930   GLuint  Height;         // Height of Image
    931   GLuint  Width;          // Width of Image
    932   GLuint  Bpp;            // Bits Per Pixel
    933 
    934   Image* pImage = new Image;
    935 
    936  
    937   if(fread(header, sizeof(header), 1, fTGA) == 0)
    938     {
    939       PRINTF(1)("Error could not read info header\n");
    940       return false;
    941     }
    942  
    943   Width = pImage->width  = header[1] * 256 + header[0];
    944   Height = pImage->height = header[3] * 256 + header[2];
    945   Bpp = pImage->bpp     = header[4];
    946 
    947   GLuint pixelcount     = Height * Width;
    948   GLuint currentpixel   = 0;
    949   GLuint currentbyte    = 0;
    950   GLubyte * colorbuffer = (GLubyte *)malloc(bytesPerPixel);
    951 
    952   //Make sure all pImage info is ok
    953   if((pImage->width <= 0) || (pImage->height <= 0) || ((pImage->bpp != 24) && (pImage->bpp !=32)))
    954     {
    955       PRINTF(1)("Error Invalid pImage information\n");
    956       return false;
    957     }
    958  
    959   bytesPerPixel = (Bpp / 8);
    960   imageSize             = (bytesPerPixel * Width * Height);
    961   pImage->data  = (GLubyte*) malloc(imageSize);
    962  
    963   if(pImage->data == NULL)
    964     {
    965       PRINTF(1)("Error could not allocate memory for image\n");
    966       return false;
    967     }
    968  
    969   do
    970     {
    971       GLubyte chunkheader = 0;
    972      
    973       if(fread(&chunkheader, sizeof(GLubyte), 1, fTGA) == 0)
    974         {
    975           PRINTF(1)("Error could not read RLE header\n");
    976           if(pImage->data != NULL)
    977             {
    978               free(pImage->data);
    979             }
    980           return false;
    981         }
    982       // If the ehader is < 128, it means the that is the number of RAW color packets minus 1
    983       if(chunkheader < 128)
    984         {
    985           short counter;
    986           chunkheader++;
    987           // Read RAW color values
    988           for(counter = 0; counter < chunkheader; counter++)
    989             {
    990               // Try to read 1 pixel
    991               if(fread(colorbuffer, 1, bytesPerPixel, fTGA) != bytesPerPixel)
    992                 {
    993                   PRINTF(1)("Error could not read image data\n");
    994                   if(colorbuffer != NULL)
    995                     {
    996                       free(colorbuffer);
    997                     }
    998                  
    999                   if(pImage->data != NULL)
    1000                     {
    1001                       free(pImage->data);
    1002                     }
    1003                  
    1004                   return false;
    1005                 }
    1006               // write to memory
    1007               // Flip R and B vcolor values around in the process
    1008               pImage->data[currentbyte    ] = colorbuffer[2];                               
    1009               pImage->data[currentbyte + 1] = colorbuffer[1];
    1010               pImage->data[currentbyte + 2] = colorbuffer[0];
    1011              
    1012               if(bytesPerPixel == 4) // if its a 32 bpp image
    1013                 {
    1014                   pImage->data[currentbyte + 3] = colorbuffer[3];// copy the 4th byte
    1015                 }
    1016              
    1017               currentbyte += bytesPerPixel;
    1018               currentpixel++;
    1019 
    1020               // Make sure we haven't read too many pixels
    1021               if(currentpixel > pixelcount)     
    1022                 {
    1023                   PRINTF(1)("Error too many pixels read\n");
    1024                   if(colorbuffer != NULL)
    1025                     {
    1026                       free(colorbuffer);
    1027                     }
    1028                  
    1029                   if(pImage->data != NULL)
    1030                     {
    1031                       free(pImage->data);
    1032                     }
    1033                  
    1034                   return false;
    1035                 }
    1036             }
    1037         }
    1038       // chunkheader > 128 RLE data, next color  reapeated chunkheader - 127 times
    1039       else
    1040         {
    1041           short counter;
    1042           chunkheader -= 127;   // Subteact 127 to get rid of the ID bit
    1043           if(fread(colorbuffer, 1, bytesPerPixel, fTGA) != bytesPerPixel) // Attempt to read following color values
    1044             {
    1045               PRINTF(1)("Error could not read from file");
    1046               if(colorbuffer != NULL)
    1047                 {
    1048                   free(colorbuffer);
    1049                 }
    1050              
    1051               if(pImage->data != NULL)
    1052                 {
    1053                   free(pImage->data);
    1054                 }
    1055              
    1056               return false;
    1057             }
    1058          
    1059           for(counter = 0; counter < chunkheader; counter++) //copy the color into the image data as many times as dictated
    1060             {                                                   
    1061               // switch R and B bytes areound while copying
    1062               pImage->data[currentbyte    ] = colorbuffer[2];
    1063               pImage->data[currentbyte + 1] = colorbuffer[1];
    1064               pImage->data[currentbyte + 2] = colorbuffer[0];
    1065              
    1066               if(bytesPerPixel == 4)
    1067                 {
    1068                   pImage->data[currentbyte + 3] = colorbuffer[3];
    1069                 }
    1070              
    1071               currentbyte += bytesPerPixel;
    1072               currentpixel++;
    1073              
    1074               if(currentpixel > pixelcount)
    1075                 {
    1076                   PRINTF(1)("Error too many pixels read\n");
    1077                   if(colorbuffer != NULL)
    1078                     {
    1079                       free(colorbuffer);
    1080                     }
    1081                  
    1082                   if(pImage->data != NULL)
    1083                     {
    1084                       free(pImage->data);
    1085                     }
    1086                  
    1087                   return false;
    1088                 }
    1089             }
    1090         }
    1091     }
    1092  
    1093   while(currentpixel < pixelcount);     // Loop while there are still pixels left
    1094 
    1095   this->loadTexToGL (pImage, texture);
    1096 
    1097   return true;
    1098 }
    1099 
    1100 
    1101 /*
    1102 static int ST_is_power_of_two(unsigned int number)
    1103 {
    1104   return (number & (number - 1)) == 0;
    1105 }
    1106 */
    1107 
    1108 /**
    1109    \brief reads in a png-file
    1110    \param pngName the Name of the Image to load
    1111    \param texture a reference to the Texture to write the image to
    1112 */
    1113 bool Material::loadPNG(const char* pngName, GLuint* texture)
    1114 {
    1115 #ifdef HAVE_PNG_H
    1116   Image* pImage = new Image;
    1117 
    1118   FILE *PNG_file = fopen(pngName, "rb");
    1119   if (PNG_file == NULL)
    1120     {
    1121       return 0;
    1122     }
    1123  
    1124   GLubyte PNG_header[8];
    1125  
    1126   fread(PNG_header, 1, 8, PNG_file);
    1127   if (png_sig_cmp(PNG_header, 0, 8) != 0)
    1128     {
    1129       PRINTF(2)("Not Recognized as a pngFile\n");
    1130       fclose (PNG_file);
    1131       return 0;
    1132     }
    1133  
    1134   png_structp PNG_reader = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
    1135   if (PNG_reader == NULL)
    1136     {
    1137       fclose(PNG_file);
    1138       return 0;
    1139     }
    1140  
    1141   png_infop PNG_info = png_create_info_struct(PNG_reader);
    1142   if (PNG_info == NULL)
    1143     {
    1144       png_destroy_read_struct(&PNG_reader, NULL, NULL);
    1145       fclose(PNG_file);
    1146       return 0;
    1147     }
    1148  
    1149   png_infop PNG_end_info = png_create_info_struct(PNG_reader);
    1150   if (PNG_end_info == NULL)
    1151     {
    1152       png_destroy_read_struct(&PNG_reader, &PNG_info, NULL);
    1153       fclose(PNG_file);
    1154       return 0;
    1155     }
    1156  
    1157   if (setjmp(png_jmpbuf(PNG_reader)))
    1158     {
    1159       png_destroy_read_struct(&PNG_reader, &PNG_info, &PNG_end_info);
    1160       fclose(PNG_file);
    1161       return (0);
    1162     }
    1163  
    1164   png_init_io(PNG_reader, PNG_file);
    1165   png_set_sig_bytes(PNG_reader, 8);
    1166  
    1167   png_read_info(PNG_reader, PNG_info);
    1168  
    1169   pImage->width = png_get_image_width(PNG_reader, PNG_info);
    1170   pImage->height = png_get_image_height(PNG_reader, PNG_info);
    1171  
    1172   png_uint_32 bit_depth, color_type;
    1173   bit_depth = png_get_bit_depth(PNG_reader, PNG_info);
    1174   color_type = png_get_color_type(PNG_reader, PNG_info);
    1175  
    1176   if (color_type == PNG_COLOR_TYPE_PALETTE)
    1177     {
    1178       png_set_palette_to_rgb(PNG_reader);
    1179     }
    1180  
    1181   if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8)
    1182     {
    1183       png_set_gray_1_2_4_to_8(PNG_reader);
    1184     }
    1185  
    1186   if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
    1187     {
    1188       png_set_gray_to_rgb(PNG_reader);
    1189     }
    1190  
    1191   if (png_get_valid(PNG_reader, PNG_info, PNG_INFO_tRNS))
    1192     {
    1193       png_set_tRNS_to_alpha(PNG_reader);
    1194     }
    1195   else
    1196     {
    1197       png_set_filler(PNG_reader, 0xff, PNG_FILLER_AFTER);
    1198     }
    1199  
    1200   if (bit_depth == 16)
    1201     {
    1202       png_set_strip_16(PNG_reader);
    1203     }
    1204  
    1205   png_read_update_info(PNG_reader, PNG_info);
    1206  
    1207   pImage->data = (png_byte*)malloc(4 * pImage->width * pImage->height);
    1208   png_byte** PNG_rows = (png_byte**)malloc(pImage->height * sizeof(png_byte*));
    1209  
    1210   unsigned int row;
    1211   for (row = 0; row < pImage->height; ++row)
    1212     {
    1213       PNG_rows[pImage->height - 1 - row] = pImage->data + (row * 4 * pImage->width);
    1214     }
    1215  
    1216   png_read_image(PNG_reader, PNG_rows);
    1217  
    1218   free(PNG_rows);
    1219  
    1220   png_destroy_read_struct(&PNG_reader, &PNG_info, &PNG_end_info);
    1221   fclose(PNG_file);
    1222  
    1223   /*  if (!ST_is_power_of_two(pImage->width) || !ST_is_power_of_two(pImage->height))
    1224     {
    1225       free(pImage->data);
    1226       return 0;
    1227     }
    1228   */
    1229   this->loadTexToGL (pImage, texture); 
    1230  
    1231   free(pImage->data);
    1232  
    1233   return true;
    1234 #else /* HAVE_PNG_H */
    1235   PRINTF(1)("sorry, but you did not compile with png-support.\nEither install SDL_image or libpng, and recompile to see the image\n");
    1236   return false;
    1237 #endif /* HAVE_PNG_H */
    1238 
    1239 }
    1240 
    1241 #endif /* HAVE_SDL_SDL_IMAGE_H */
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