/* function: init()
This function is to initailize the texture
Source: Tutorial*/
void init()
{
tex = LoadPPM("copter.ppm", &width, &height, &max1);
glClearColor(0, 0, 0, 0);
glColor3f(1, 1, 1);
//glEnable(GL_LIGHTING);
//glEnable(GL_LIGHT0);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
//glOrtho(-2, 2, -2, 2, -2, 2);
//glLightfv(GL_LIGHT0, GL_POSITION, light_pos);
gluPerspective (75,1,2,5000);
glEnable(GL_TEXTURE_2D);
// glGenTextures(1, &tex);
// glBindTexture(GL_TEXTURE_2D, &tex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, tex);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
//glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
//glDisable(GL_TEXTURE_2D);
//glBindTexture(GL_TEXTURE_2D, tex);
// printf("%d\n", glGetError());
}
//
// Load a new image from an image file (PPM, JPEG
// and PNG formats are supported).
// Returns NULL on failure.
//
STImage::STImage(const std::string& filename)
: mWidth(-1)
, mHeight(-1)
, mPixels(NULL)
{
// Determine the right routine based on the file's extension.
// The format-specific subroutines are each implemented in
// a different file.
std::string ext = STGetExtension( filename );
if (ext.compare("PPM") == 0) {
LoadPPM(filename);
}
else if (ext.compare("PNG") == 0) {
LoadPNG(filename);
}
else if (ext.compare("JPG") == 0 || ext.compare("JPEG") == 0) {
LoadJPG(filename);
}
else {
fprintf(stderr,
"STImage::STImage() - Unknown image file type \"%s\".\n",
filename.c_str());
throw new std::runtime_error("Error creating STImage");
}
}
int Texture::Load(const char *name){
rgbimg<float> rgb;
if(LoadPPM(rgb,name)) return 1;
int i;
for(i=0;i<rgb.size();i++) rgb[i]/=255;
cmpdtxtr.SetTexture(&rgb[0],rgb.szx,rgb.szy,4);
return 0;
}
int main( int argc, char *argv[] )
{
int i;
unsigned char* img = 0;
int w, h;
FILE *output;
char basename[200];
if ( argc != 2 && argc != 3 ) {
fprintf( stderr, "USAGE: %s input.ppm [output.cpp]\n", argv[0] );
return 1;
}
LoadPPM( argv[1], img, w, h );
if ( img ) {
strcpy( basename, argv[1] );
basename[ strlen(basename)-4 ] = '\0';
if (argc == 3)
output = fopen( argv[2], "w" );
else
output = stdout;
if ( !output ) {
fprintf( stderr, "ERROR: File '%s' could not be opened for writing\n",
argv[2] );
return 1;
}
VFlip(img,w,h); /* Opengl bitmaps are specified bottom-to-top */
fprintf( output, "\n\n");
fprintf( output, "int %s[] = {", basename );
fprintf( output, " %d, %d, /* width, height */\n", w, h);
fprintf( output, " " );
for( i=0; i<w * h; i++ ) {
fprintf( output, "%3d,%3d,%3d, ",
img[i*3+0],
img[i*3+1],
img[i*3+2] );
if ( (i%5) == 4 ) {
fprintf( output, "\n " );
}
}
fprintf( output, "\n};\n" );
fclose( output );
}
else {
fprintf( stderr, "ERROR: Image '%s' invalid\n", argv[1] );
return 1;
}
return 0;
}
