Texture Displayed with Green Hue - opengl

Question

I'm learning how to apply textures in OpenGL. I have a fairly simple cube on which I am trying to apply a texture to make it look like a wooden board. When I apply my texture, it displays with a green hue. I can apply some other textures that look just fine, so I can't figure out what is wrong with this one. I created the texture from a jpg that I downloaded. The bmp file looks fine when I view it in Preview (I'm on a Mac). I'll attach a screenshot of the original bitmap and also of how it looks when rendered by OpenGL.
The texture loading code that I am using can be found here:
unsigned int texture[2]; // Texture names
// define the board
float square_edge = 1;
float border = 0.5;
float board_thickness = 0.25;
float board_corner = 4 * square_edge + border;
float board_width = 2 * board_corner;
GLfloat board_vertices[8][3] = {
{-board_corner, board_corner, 0.0},
{-board_corner, -board_corner, 0.0},
{ board_corner, -board_corner, 0.0},
{ board_corner, board_corner, 0.0},
{-board_corner, board_corner, -board_thickness},
{-board_corner, -board_corner, -board_thickness},
{ board_corner, -board_corner, -board_thickness},
{ board_corner, board_corner, -board_thickness}
};
void polygon(int a, int b, int c, int d) {
glBindTexture(GL_TEXTURE_2D, texture[0]);
glBegin(GL_QUADS);
glTexCoord2f(0.0, 0.0); glVertex3fv(board_vertices[a]);
glTexCoord2f(1.0, 0.0); glVertex3fv(board_vertices[b]);
glTexCoord2f(1.0, 1.0); glVertex3fv(board_vertices[c]);
glTexCoord2f(0.0, 1.0); glVertex3fv(board_vertices[d]);
glEnd();
}
void draw_board() {
glPushMatrix();
glRotatef(rotx, 1.0, 0.0, 0.0);
glScalef(1/board_corner, 1/board_corner, 1/board_corner);
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT, 0, board_vertices);
glBindTexture(GL_TEXTURE_2D, texture[1]);
glColor3f(1.0, 1.0, 1.0); //color of the border, sides, bottom of board
// draw the board
polygon(0,3,2,1);
polygon(2,3,7,6);
polygon(0,4,7,3);
polygon(1,2,6,5);
polygon(4,5,6,7);
polygon(0,1,5,4);
glPopMatrix();
}
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
glEnable(GL_TEXTURE_2D);
glLoadIdentity();
double Ex = -2*dim*Sin(th)*Cos(ph);
double Ey = +2*dim *Sin(ph);
double Ez = +2*dim*Cos(th)*Cos(ph);
gluLookAt(Ex,Ey,Ez , 0,0,0 , 0,Cos(ph),0);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
draw_board();
glFlush();
glutSwapBuffers();
}

Answer 1

The problem is in the bmp image itself. As I mentioned, I created this from a jpg file by converting it via Gimp. Somehow, this conversion went awry. When I run 'file wood.bmp' from the command line, my response is 'wood.bmp: data'. It should show 'wood.bmp: PC bitmap, Windows 3.x format, 128 x 128 x 24" or something similar. I did the conversion using good ol' MS Paint, and the problem went away.
I'm trying to find out how to do this in Gimp, but for now this all works. Thanks for all the suggestions!

Answer 2

When exporting a .bmp image with gimp, make sure you select the "Do not write color space information" option, underneath the Compatibility Options dropdown. .bmp images exported this way won't appear with a green hue when rendered with opengl.