//--------------------------------------------------------------------------
/// \brief This function loads the specified image file and returns the
/// openGL texture object for it. Only tga, bmp and pcx images are
/// supported.
/// \param filename - the image file to use for the texture
/// \return compressed - if true DXT compression will be used.
///
unsigned int LoadTexture(const char* filename,bool compressed, bool makeMips, int *outWidth, int *outHeight)
{
#ifndef _WIN32 // #if MACINTOSH
// This is a HACK for the Mac version which has some directory trouble.
// This hardcoded path should be fixed soon to something more flexible.
char buffer[1000];
const char *currentDirectory = getcwd( buffer, 1000);
//
// printf("Texture Directorily: %s\n",currentDirectory);
//
// char *strstr = strFind(currentDirectory,"build");
// const char *substring = strstr(currentDirectory, "build");
// printf("substring: %s\n", substring);
// chdir(currentDirectory);
// chdir("/Users/puck 1/Desktop/trunk/BrainMobile/runtime");
// chdir("/Users/SPL/Desktop/DWDT/dwd/BrainMobile/runtime");
chdir("/Applications/DWD/dwd/BrainMobile/runtime");
#endif
// check to see if file is already loaded.
std::map<std::string,TexRef>::iterator it = g_Textures.find(filename);
if ( it!=g_Textures.end()) {
it->second.ref++;
return it->second.idx;
}
// if not, try to load the file.
unsigned int w=0,h=0,bpp=0;
unsigned char* pixels=0;
int len = static_cast<int>(strlen(filename));
// load a bmp
if( (filename[len-3] == 'b' || filename[len-3] == 'B') &&
(filename[len-2] == 'm' || filename[len-2] == 'M') &&
(filename[len-1] == 'p' || filename[len-1] == 'P') ) {
if(!LoadBmpImage(filename,&pixels,&w,&h,&bpp))
return 0;
}
else
// load a pcx
if( (filename[len-3] == 'p' || filename[len-3] == 'P') &&
(filename[len-2] == 'c' || filename[len-2] == 'C') &&
(filename[len-1] == 'x' || filename[len-1] == 'X') ) {
if(!LoadPcxImage(filename,&pixels,&w,&h,&bpp))
return 0;
}
else
// load a tga
if( (filename[len-3] == 't' || filename[len-3] == 'T') &&
(filename[len-2] == 'g' || filename[len-2] == 'G') &&
(filename[len-1] == 'a' || filename[len-1] == 'A') ) {
if(!LoadTgaImage(filename,&pixels,&w,&h,&bpp))
return 0;
}
else {
std::cerr << "Unsupported image format\n";
return 0;
}
// generat the correct texture type for the image
unsigned int tex_object;
switch(bpp) {
case 1:
tex_object = MakeGlTexture(GL_ALPHA,pixels,w,h,compressed, makeMips);
break;
case 2:
break;
case 3:
tex_object = MakeGlTexture(GL_RGB,pixels,w,h,compressed, makeMips);
break;
case 4:
tex_object = MakeGlTexture(GL_RGBA,pixels,w,h,compressed, makeMips);
break;
default:
break;
}
int data_size=0;
if(compressed) {
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED_IMAGE_SIZE,&data_size);
}
else {
data_size = bpp*w*h;
}
// delete the pixel data because we no longer need it
free(pixels);
// insert the texture into a map to keep track of it
g_Textures.insert( std::make_pair( std::string(filename), TexRef(tex_object,data_size) ) );
if (outWidth != NULL)
*outWidth = w;
if (outHeight != NULL)
*outHeight = h;
// return GL texture object
return tex_object;
}
//--------------------------------------------------------------------------
/// \brief This function loads the specified image file and returns the
/// openGL texture object for it. Only tga, bmp and pcx images are
/// supported.
/// \param filename - the image file to use for the texture
/// \return compressed - if true DXT compression will be used.
///
unsigned int LoadTexture(const char* filename,bool compressed) {
// check to see if file is already loaded.
std::map<std::string,TexRef>::iterator it = g_Textures.find(filename);
if ( it!=g_Textures.end()) {
it->second.ref++;
return it->second.idx;
}
// if not, try to load the file.
unsigned int w=0,h=0,bpp=0;
unsigned char* pixels=0;
int len = static_cast<int>(strlen(filename));
// load a bmp
if( (filename[len-3] == 'b' || filename[len-3] == 'B') &&
(filename[len-2] == 'm' || filename[len-2] == 'M') &&
(filename[len-1] == 'p' || filename[len-1] == 'P') ) {
if(!LoadBmpImage(filename,&pixels,&w,&h,&bpp))
return 0;
}
else
// load a pcx
if( (filename[len-3] == 'p' || filename[len-3] == 'P') &&
(filename[len-2] == 'c' || filename[len-2] == 'C') &&
(filename[len-1] == 'x' || filename[len-1] == 'X') ) {
if(!LoadPcxImage(filename,&pixels,&w,&h,&bpp))
return 0;
}
else
// load a tga
if( (filename[len-3] == 't' || filename[len-3] == 'T') &&
(filename[len-2] == 'g' || filename[len-2] == 'G') &&
(filename[len-1] == 'a' || filename[len-1] == 'A') ) {
if(!LoadTgaImage(filename,&pixels,&w,&h,&bpp))
return 0;
}
else {
std::cerr << "Unsupported image format\n";
return 0;
}
// generat the correct texture type for the image
unsigned int tex_object;
switch(bpp) {
case 1:
tex_object = MakeGlTexture(GL_ALPHA,pixels,w,h,compressed);
break;
case 2:
break;
case 3:
tex_object = MakeGlTexture(GL_RGB,pixels,w,h,compressed);
break;
case 4:
tex_object = MakeGlTexture(GL_RGBA,pixels,w,h,compressed);
break;
default:
break;
}
int data_size=0;
if(compressed) {
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED_IMAGE_SIZE,&data_size);
}
else {
data_size = bpp*w*h;
}
// delete the pixel data because we no longer need it
free(pixels);
// insert the texture into a map to keep track of it
g_Textures.insert( std::make_pair( std::string(filename), TexRef(tex_object,data_size) ) );
// return GL texture object
return tex_object;
}
