In PixelTransfer11, center offset should be 1/size, not 1/(size-1).

Bug: angleproject:3039 Change-Id: Ie97bfb5aa3cfe7cd2c4b1d22b5b4a8d82a5e5170 Reviewed-on: https://chromium-review.googlesource.com/c/1407251Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>

In PixelTransfer11, center offset should be 1/size, not 1/(size-1).
15460e36 · Jeff Gilbert · Commit Bot · 55f20f68 · 15460e36
Commit 15460e36 authored Jan 03, 2019 by Jeff Gilbert Committed by Commit Bot Jan 15, 2019
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PixelTransfer11.cpp src/libANGLE/renderer/d3d/d3d11/PixelTransfer11.cpp +2 -2

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--- a/src/libANGLE/renderer/d3d/d3d11/PixelTransfer11.cpp
+++ b/src/libANGLE/renderer/d3d/d3d11/PixelTransfer11.cpp
@@ -125,8 +125,8 @@ void PixelTransfer11::setBufferToTextureCopyParams(const gl::Box &destArea,
 {
    StructZero(parametersOut);

-    float texelCenterX = 0.5f / static_cast<float>(destSize.width - 1);
-    float texelCenterY = 0.5f / static_cast<float>(destSize.height - 1);
+    float texelCenterX = 0.5f / static_cast<float>(destSize.width);
+    float texelCenterY = 0.5f / static_cast<float>(destSize.height);

    unsigned int bytesPerPixel  = gl::GetSizedInternalFormatInfo(internalFormat).pixelBytes;
    unsigned int alignmentBytes = static_cast<unsigned int>(unpack.alignment);