load .png texture using soil, issue - opengl

Question

Hey guys I'm new in OpenGL, and I have an issue while I try to display a texture.Every texture I try to display in .png format it just gives it's color, for example if I try to display a red brick it just appears the red, only the color. The code I use is below.Where should I bind the texture or what's wrong with code? I can't aunderstand.
GLuint LoadTexture(const char * filename, int width, int height){
GLuint texture_id;
unsigned char *data;
texture_id = SOIL_load_OGL_texture(filename,
4, 0, SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_INVERT_Y);
if (texture_id == 0)
{
printf( "SOIL loading error: '%s'\n", SOIL_last_result() );
}
glBindTexture(GL_TEXTURE_2D, texture_id);
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);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
}
void display()
{
glClearColor(0, 0, 0, 1);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_TEXTURE_2D);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
int w = glutGet(GLUT_WINDOW_WIDTH);
int h = glutGet(GLUT_WINDOW_HEIGHT);
gluPerspective(60, w / h, 0.1, 100);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(3, 3, 3,
0, 0, 0,
0, 0, 1);
glRotatef(rotate_x, 1.0, 0.0, 0.0);
glRotatef(rotate_y, 0.0, 1.0, 0.0);
glBindTexture(GL_TEXTURE_2D, texture);
glEnable(GL_TEXTURE_2D);
mycube();
glutSwapBuffers();
}
int main(int argc, char **argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGBA | GLUT_DEPTH | GLUT_DOUBLE);
glutInitWindowSize(640, 480);
glutCreateWindow("CUBE");
texture = LoadTexture("texture.png", 256, 256);
glutDisplayFunc(display);
glutSpecialFunc(specialKeys);
glEnable(GLUT_DEPTH);
glutMainLoop();
FreeTexture(texture);
return 0;
}

Answer 1

I do not see the source of your LoadTexture() function. One thing that can be done is to create a structure that holds the id value that OpenGL sets to a texture when it is bound to a renderable object, its width & height in pixels, color bit depth information, and the color data, if it contains transparencies, should be wrapped or repeated, and the mipmap quality being used. I do not know what you are using to open, read and parse a png file, but within my own projects I happen to use libpng.