D3D11: Optimize sample caps checks.

We don't need to check NPOT sample counts. This should save us some time on eglInitialize. BUG=angleproject:1014 Change-Id: Id3b0a440689746d5de9a7fbc3641ff9452b18601 Reviewed-on: https://chromium-review.googlesource.com/274430Tested-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>

D3D11: Optimize sample caps checks.
10eb591a · Jamie Madill · 5c407bb7 · 10eb591a
Commit 10eb591a authored May 28, 2015 by Jamie Madill
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renderer11_utils.cpp src/libANGLE/renderer/d3d/d3d11/renderer11_utils.cpp +1 -1

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--- a/src/libANGLE/renderer/d3d/d3d11/renderer11_utils.cpp
+++ b/src/libANGLE/renderer/d3d/d3d11/renderer11_utils.cpp
@@ -274,7 +274,7 @@ static gl::TextureCaps GenerateTextureFormatCaps(GLint maxClientVersion, GLenum 
    if (SUCCEEDED(device->CheckFormatSupport(formatInfo.renderFormat, &formatSupport)) &&
        ((formatSupport & D3D11_FORMAT_SUPPORT_MULTISAMPLE_RENDERTARGET) != 0))
    {
-        for (size_t sampleCount = 1; sampleCount <= D3D11_MAX_MULTISAMPLE_SAMPLE_COUNT; sampleCount++)
+        for (size_t sampleCount = 1; sampleCount <= D3D11_MAX_MULTISAMPLE_SAMPLE_COUNT; sampleCount *= 2)
        {
            UINT qualityCount = 0;
            if (SUCCEEDED(device->CheckMultisampleQualityLevels(formatInfo.renderFormat, sampleCount, &qualityCount)) &&