Copy screen & render with OpenGL

[XTAL256]

Hi, i am writing an app that copies the screen, warps/distorts the image, then draws it back. I already got the code working in a visualization i am making for Windows Media Player but for some reason it won't work now.

glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

enableBlend();
glColor4f(1.0f, 1.0f, 1.0f, 0.9f);
renderBackground(wf); // Render warped background

enableTexture(image);
glBegin(GL_QUADS); // Draw image over background
glTexCoord2f(0, 1); glVertex2f(0, 0);
glTexCoord2f(0, 0); glVertex2f(0, 512);
glTexCoord2f(1, 0); glVertex2f(512, 512);
glTexCoord2f(1, 1); glVertex2f(512, 0);
glEnd();

glBindTexture(GL_TEXTURE_2D, backTexture);// Copy image to texture
glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 0, 0, 512, 512, 0);

disableTexture();
disableBlend();

That's basically it, renderBackground() draws the texture over a grid of warp points which is stored in a WarpFile object. The enable/disable methods are just wrappers for the OpenGL commands. Is there anything i am doing wrong? I tried pbuffers do copy/render to but it was too hard. If you need me to post more code (like the renderBackground method) just ask thanks

-------------------------------- Customer in computer shop: "Can you copy the Internet onto this disk for me?"

[XTAL256]

I FIXED IT! These are the 3 lines directly before the code above:

if (bgType = BG_BLUR)
renderBlur(wf, 20, 0.2f);
else if (bgType = BG_WARP) {
// All of the above code is here
}

See something wrong? I didn't until just then. = instead of == !!! I can't believe i made such a simple mistake. I know everyone makes silly mistakes but i seem to be getting == confused with = a lot lately. Sorry if i'm rambling on, i just had to say this. That one bug has really been pissing me off :mad::confused::wtf::(:((

-------------------------------- Customer in computer shop: "Can you copy the Internet onto this disk for me?"

[Luc Pattyn]

VizCoder wrote:

That one bug has really been p...

You should consider switching to a modern programming language ... :)

Luc Pattyn

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[Christian Graus]

Get in the habit of doing this: if (BG_WARP == bgType) That won't compile with the single =

Christian Graus - Microsoft MVP - C++ "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )