CODEWITHSUNDEEP
imageopengltexturessoil
pranphy
pranphy

Reputation: 1889

Displaying image using SOIL with OpenGL

I have a have following code which is supposed to display an image but the image never appears.

GLuint tex_2d = SOIL_load_OGL_texture (
    "ImageName.tga",
    SOIL_LOAD_AUTO,
    SOIL_CREATE_NEW_ID,
    SOIL_FLAG_MIPMAPS | SOIL_FLAG_INVERT_Y | SOIL_FLAG_NTSC_SAFE_RGB | SOIL_FLAG_COMPRESS_TO_DXT
);
glColor3f(0.0f,1.0f,.50f);
glBindTexture(GL_TEXTURE_2D, tex_2d);
glEnable(GL_TEXTURE_2D);
glBegin(GL_QUADS);
    glTexCoord2d(0,0);        glVertex3f(factor*BOARD_BREADTH/2,-factor*BOARD_LENGTH/2,0);
    glTexCoord2d(0,1);        glVertex3f(factor*BOARD_BREADTH/2,factor*BOARD_LENGTH/2,0);
    glTexCoord2d(1,1);        glVertex3f(-factor*BOARD_BREADTH/2,factor*BOARD_LENGTH/2,0);
    glTexCoord2d(1,0);        glVertex3f(-factor*BOARD_BREADTH/2,-factor*BOARD_LENGTH/2,0);


glEnd();

But I only get a green rectangle as output. There is no compilation error.

Upvotes: 2

Views: 2172

Answers (1)

Bartek Banachewicz
Bartek Banachewicz

Reputation: 39370

SOIL_load_OGL_texture returns correct OpenGL texture identifier if the loading succeeds, 0 if it fails. You should always check for that!

In your case, if the wrong path caused the problem, use relative paths. Here's example folder structure:

root/
--- data/
-------- music/
-------- images/
------------ texture.tga
--- bin/
-------- debug/
------------ program.exe

In that case, the relative path would be "../../data/images/texture.tga". Note how we go up twice (by .., to get to root/, then go into data/images/.

That way if you keep the folder structure, it doesn't matter where the root/ resides on disk.

Upvotes: 2

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