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HLSL - Get viewport Width/Height

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Other than manually passing them in, is it possible to get the viewport width and height within a HLSL shader? (DX10)

Something similar to Texture2D.GetDimensions().

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I can only think of one hacky way. You can input the pixel position as an integer into the pixel shader in addition to the uv coordinates. You can then multiply the pixel position by the inverse of the uv coordinates. To get the pixel position, use SV_Position. This has some problems, but it was the only way I could think of. In other words: don't do this unless you HAVE to.

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