OpenGL and full screen

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February 12th, 2007, 12:47 AM

|d|l34rn3r

Contributing User

Join Date: Mar 2004

Posts: 92

Time spent in forums: 6 h 47 m 7 sec
Reputation Power: 6

OpenGL and full screen

Hi,

I'm having issues with rendering a texture on an object in full screen mode. No problems occur in windowed mode, however in full screen the texture isn't rendered properly.

I am initializing GL as so:

PHP Code:


		
			
::glClearColor(0.0f, 0.0f, 0.0f, 0.5f);

    ::glClearDepth(1.0f);

    ::glDepthFunc(GL_LEQUAL);

    ::glEnable(GL_DEPTH_TEST);

    ::glEnable(GL_TEXTURE_2D);

    ::glShadeModel(GL_SMOOTH);

    ::glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);



    ::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);

    ::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

    ::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

    ::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

    ::glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);

And I'm making the following calls before actually drawing the elements (by invoking glDrawElements):

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 glEnable(GL_LIGHT0);

    glLightfv(GL_LIGHT0, GL_DIFFUSE, samplelight);



    // Set the current object transformation

    glLoadIdentity();

    ::glBindTexture(GL_TEXTURE_2D, m_pTexture->TextureID);

    glTranslatef(m_fX, m_fY, m_fZ - 200);

    glRotatef(m_fAZ, 1.0f, 0.0f, 0.0f);

    glRotatef(m_fAY, 0.0f, 1.0f, 0.0f);

    glRotatef(m_fAZ, 0.0f, 0.0f, 1.0f);



    glEnableClientState(GL_TEXTURE_COORD_ARRAY);

    glTexCoordPointer(2, GL_FLOAT, 0, m_TexCoordData);

    glEnableClientState(GL_NORMAL_ARRAY);

    glNormalPointer(GL_FLOAT, 0, m_NormalData);

    glEnableClientState(GL_VERTEX_ARRAY);

    glVertexPointer(3, GL_FLOAT, 0, m_VertexData);



    GLfloat glfModelSpecular[4];



    // This causes the polygon's ambient & diffuse colors to be derived from the glColor() value.

    glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);

    glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, shininess);

    /* Set the specular shading color. */

    glfModelSpecular[0] = r_specularColor;

    glfModelSpecular[1] = g_specularColor;

    glfModelSpecular[2] = b_specularColor;

    glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, glfModelSpecular);

    glColor3f(r_diffuseColor, g_diffuseColor, b_diffuseColor);

What do you think this full-screen glitch might be? Are there any tests you could recommend me to try and identify what's causing this? I've tried googling this up but have had no luck...

I'd really appreciate some feedback!

February 18th, 2007, 11:17 PM

Devorius

Contributing User

Join Date: May 2006

Posts: 45

Time spent in forums: 4 Days 7 h 20 m 59 sec
Reputation Power: 4

I haven't worked much with OpenGL at a programatic level, however a lot of video cards (especially ATI) have rendering problems with OpenGL, some of which only occur in a full screen mode.

That said, it may be useful to detail how exactly it is being rendered incorrectly.

In the mean time, while awaiting a better answer, you might check out the example/demo programs from OGRE or Irrlicht (two open source 3D engines), both of which allow you to choose between renderers (OpenGL, D3D, Software) so that you might determine if it is a problem with your video card/driver.

February 19th, 2007, 03:54 AM

|d|l34rn3r

Contributing User

Join Date: Mar 2004

Posts: 92

Time spent in forums: 6 h 47 m 7 sec
Reputation Power: 6

Thanks for that. I've meanwhile sorted out what was causing the glitch and now it seems to be working just fine.

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