I need help. I tried to load an image using SOIL. I was having problems with it so I found another code I am using. However, it looks like I am not loading it properly. It's simple but I think I'm confusing myself. I still can't wrap my head around how the file will be read. Should I include the whole path name or just the image name? If I don't add the path name, how will the image be found? Please take a look at the two code segnments in the LoadGLTexture function and help me figure this out. Thanks.
filename is coming from the display functioon:
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glRotatef(Angle, 0.0, 0.0, 0.0);
GLuint texture = LoadGLTexture("face.png", 396, 734);
glEnable(GL_TEXTURE_2D);
glBindTexture( GL_TEXTURE_2D, texture );
.
.
.
.
}GLint LoadGLTexture(const char *filename, int width, int height)
{
GLuint texture;
unsigned char *data;
FILE *file;
//CODE SEGMENT 1
// open texture data
file = fopen(filename, "C:\\Users\\annette\\My Pictures\\face.png");
if (file == NULL) return 0;
// allocate buffer
data = (unsigned char*) malloc(width * height * 4);
//read texture data
fread(data, width * height * 4, 1, file);
fclose(file);
//CODE SEGMENT 2
texture = SOIL_load_OGL_texture // load an image file directly as a new OpenGL texture
(
"C:\\Users\\annette\\My Pictures\\face.png",
SOIL_LOAD_AUTO,
SOIL_CREATE_NEW_ID,
SOIL_FLAG_MIPMAPS | SOIL_FLAG_INVERT_Y | SOIL_FLAG_NTSC_SAFE_RGB | SOIL_FLAG_COMPRESS_TO_DXT
);
// check for an error during the load process
if(texture == 0)
{
//printf( "SOIL loading error: '%s'\n", SOIL_last_result() );
}
glGenTextures(1, &texture); // allocate a texture name
glBindTexture(GL_TEXTURE_2D, texture); // select our current texture
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_DECAL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_DECAL);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST); // when texture area is small, bilinear filter the closest mipmap
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); // when texture area is large, bilinear filter the first mipmap
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); // texture should tile
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
gluBuild2DMipmaps(GL_TEXTURE_2D, 4, width, height, GL_RGBA, GL_UNSIGNED_BYTE, data); // build our texture mipmaps
free(data); // free buffer
return texture;
}