3D graphics questions that do not deserve their own thread (OpenGL / Dx10)

The Something Awful Forums > Discussion > Serious Hardware/Software Crap > The Cavern of COBOL > 3D graphics questions that do not deserve their own thread (OpenGL / Dx10)

dimebag dinkman: Feb 20, 2003

This is a 2D rather than a 3D question, but - if I'm using OpenGL, what's the recommended way(s) of doing an integer scaling of the output to the screen (i.e. either normal size, or exactly double in both dimensions, or exactly triple, etc.), with no filtering (nearest neighbour scaling)? I do want this to be over the entire rendered output, not just individual components (so, for example, if something is rendered rotated at 45 degrees, its pixels still appear aligned to the edges of the screen at 4x scale).

# ¿ Jan 11, 2009 18:26

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# ¿ May 3, 2024 00:39

dimebag dinkman: Feb 20, 2003

sex offendin Link posted:

go hog wild.

I will!

# ¿ Jan 11, 2009 20:33

dimebag dinkman: Feb 20, 2003

not a dinosaur posted:

Why would you do that instead of just changing the viewport appropriately?

I wanted the output to be simplistically scaled with no increase in resolution, as you would get if you just change the viewport.

# ¿ Jan 11, 2009 22:25

dimebag dinkman: Feb 20, 2003

I'll try to clarify what I mean:

I want the one on the left. (Yes, really).

# ¿ Jan 11, 2009 23:00

dimebag dinkman: Feb 20, 2003

PnP Bios posted:

Sample the buffer and when you call glTexParameter, use gl_Nearest?

Could you explain what you mean by "sample the buffer" a bit more? Do you just mean rendering to a framebuffer object, as sex offendin Link suggested?

# ¿ Jan 12, 2009 21:19

The Something Awful Forums > Discussion > Serious Hardware/Software Crap > The Cavern of COBOL > 3D graphics questions that do not deserve their own thread (OpenGL / Dx10)