Update the VertexAttribute test expectations.

When we switched from converting 8-bit normalized signed int from a full 32-bit float expansion to a 4-channel 8-bit format, we broke an ANGLE test. Giving the test a slightly looser bound produces the correct output, due to floating point rounding. BUG=angle:612 Change-Id: I8781e6efe83341e22d31d35b35e0048889bcd540 Reviewed-on: https://chromium-review.googlesource.com/196532Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Shannon Woods <shannonwoods@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>

Update the VertexAttribute test expectations.
a56a86e6 · Jamie Madill · cdacacdd · a56a86e6
Commit a56a86e6 authored Apr 22, 2014 by Jamie Madill
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Showing with 7 additions and 2 deletions

VertexAttributeTest.cpp tests/angle_tests/VertexAttributeTest.cpp +7 -2

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--- a/tests/angle_tests/VertexAttributeTest.cpp
+++ b/tests/angle_tests/VertexAttributeTest.cpp
@@ -49,7 +49,12 @@ protected:
            glDisableVertexAttribArray(mTestAttrib);
            glDisableVertexAttribArray(mExpectedAttrib);

-            EXPECT_PIXEL_EQ(midPixelX, midPixelY, 255, 255, 255, 255);
+            // We need to offset our checks from triangle edges to ensure we don't fall on a single tri
+            // Avoid making assumptions of drawQuad with four checks to check the four possible tri regions
+            EXPECT_PIXEL_EQ((midPixelX + viewportSize[0]) / 2, midPixelY, 255, 255, 255, 255);
+            EXPECT_PIXEL_EQ((midPixelX + viewportSize[2]) / 2, midPixelY, 255, 255, 255, 255);
+            EXPECT_PIXEL_EQ(midPixelX, (midPixelY + viewportSize[1]) / 2, 255, 255, 255, 255);
+            EXPECT_PIXEL_EQ(midPixelX, (midPixelY + viewportSize[3]) / 2, 255, 255, 255, 255);
        }
    }

@@ -68,7 +73,7 @@ protected:
            void main(void)
            {
                gl_Position = position;
-                color = vec4(lessThan(abs(test - expected), vec4(1.0 / 128.0)));
+                color = vec4(lessThan(abs(test - expected), vec4(1.0 / 64.0)));
            }
        );