Optimize LoadL8ToRGBA8.

We can save some work by re-using the color value in a temporary. BUG=angle:842 Change-Id: Ib64b34ca7bc77c73368e159527ad84419079f958 Reviewed-on: https://chromium-review.googlesource.com/231997Reviewed-by: Bruce Dawson <brucedawson@google.com> Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>

Optimize LoadL8ToRGBA8.
d3404ffd · Jamie Madill · 149257f5 · d3404ffd
Commit d3404ffd authored Nov 27, 2014 by Jamie Madill
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loadimage.cpp src/libANGLE/renderer/loadimage.cpp +4 -3

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--- a/src/libANGLE/renderer/loadimage.cpp
+++ b/src/libANGLE/renderer/loadimage.cpp
@@ -91,9 +91,10 @@ void LoadL8ToRGBA8(size_t width, size_t height, size_t depth,
            uint8_t *dest = OffsetDataPointer<uint8_t>(output, y, z, outputRowPitch, outputDepthPitch);
            for (size_t x = 0; x < width; x++)
            {
-                dest[4 * x + 0] = source[x];
-                dest[4 * x + 1] = source[x];
-                dest[4 * x + 2] = source[x];
+                uint8_t sourceVal = source[x];
+                dest[4 * x + 0] = sourceVal;
+                dest[4 * x + 1] = sourceVal;
+                dest[4 * x + 2] = sourceVal;
                dest[4 * x + 3] = 0xFF;
            }
        }