Fix mirror sampling fixes issue 135.

14 years ago · 2ea2b40c72
parent e2ac16f100
commit 2ea2b40c72
2 changed files with 13 additions and 9 deletions
--- a/1
+++ b/1
@ -5,6 +5,7 @@ NVIDIA Texture Tools version 2.0.9
 * Improve C# / .NET Wrapper
 * Add an XNA Game Studio 3.1 Content Processor to make it easy to utilize NVIDIA Texture Tools in XNA applications.
 * Fix single color DXT1a compressor. Fixes issue 134.
+ * Fix mirror sampling. Fixes issue 135.

 NVIDIA Texture Tools version 2.0.8
 * Fix float to fixed image conversion. Patch provided by Alex Pfaffe. Fixes issue 121.
--- a/src/nvimage/FloatImage.cpp
+++ b/src/nvimage/FloatImage.cpp
@ -34,10 +34,13 @@ namespace

    static int mirror(int x, int w)
    {
+        if (w == 1) return 0;
+
        x = abs(x);
        while (x >= w) {
-			x = 2 * w - x - 2;
+            x = abs(w + w - x - 2);
        }
+
        return x;
    }
 }