Only generate valid premul test data in SRGBReadWritePixels test

Change-Id: I9ca830b2bcf3341b06bc4e261dba40809b452194
Reviewed-on: https://skia-review.googlesource.com/140572
Commit-Queue: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
Auto-Submit: Brian Osman <brianosman@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/SRGBReadWritePixelsTest.cpp b/tests/SRGBReadWritePixelsTest.cpp
index 9c56de0c9c..292f69a867 100644
--- a/tests/SRGBReadWritePixelsTest.cpp
+++ b/tests/SRGBReadWritePixelsTest.cpp
@@ -188,7 +188,7 @@ static std::unique_ptr<uint32_t[]> make_data() {
     std::unique_ptr<uint32_t[]> data(new uint32_t[kW * kH]);
     for (int j = 0; j < kH; ++j) {
         for (int i = 0; i < kW; ++i) {
-            data[j * kW + i] = (j << 24) | (i << 16) | (i << 8) | i;
+            data[j * kW + i] = (SkTMax(j, i) << 24) | (i << 16) | (i << 8) | i;
         }
     }
     return data;