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POWhat am I doing wrong that I can't render an image/texture properly in OpenGL?
 

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  1. POWhat am I doing wrong that I can't render an image/texture properly in OpenGL?
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    <p>I'm trying to render an image to the window. Super simple (or so I thought). No matter what I do, I always get this purple square. Some tidbits of my code:</p> <pre><code>// load image from file, called one time on load: glClearColor (0.0, 0.0, 0.0, 0.0); glShadeModel(GL_FLAT); glEnable(GL_DEPTH_TEST); RgbImage theTexMap( filename ); glGenTextures(1, &amp;textureID); glBindTexture(GL_TEXTURE_2D, textureID); 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); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, theTexMap.GetNumCols(), theTexMap.GetNumRows(), 0, GL_RGB, GL_UNSIGNED_BYTE, theTexMap.ImageData() ); // render quad and texture, called inside glutDisplayFunc callback glEnable(GL_TEXTURE_2D); glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); glBegin(GL_QUADS); glTexCoord2f(0.0, 0.0); glVertex3f(-50.0, -50.0, 0.0); glTexCoord2f(0.0, 1.0); glVertex3f(-50.0, 50.0, 0.0); glTexCoord2f(1.0, 1.0); glVertex3f(50.0, 50.0, 0.0); glTexCoord2f(1.0, 0.0); glVertex3f(50.0, -50.0, 0.0); glEnd(); glFlush(); glDisable(GL_TEXTURE_2D); </code></pre> <p>I'm cutting out a lot of code because I'm attempting to extend an example from third party library (ARToolkit). There's a lot more code in there than needs displaying here.</p> <p>Any ideas for a mistake I might be making that would display the quad, but not render the texture/image?</p> <p><img src="https://i.stack.imgur.com/o7clU.png" alt="alt text"></p>
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