Fix off-by-one max mip levels in getSRV.

We would try to create SRVs with zero mip levels, when we should be asking for a single mip level. This would happen when the base level is equal to the max level. See the dEQP test: texture.mipmap.2d.max_level.linear_nearest Change-Id: I3f231f159dbdecbf7c2e61b373bfc3545875f36e Reviewed-on: https://chromium-review.googlesource.com/240762Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Brandon Jones <bajones@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>

Fix off-by-one max mip levels in getSRV.
155610b9 · Jamie Madill · 3c9db122 · 155610b9
Commit 155610b9 authored Jan 15, 2015 by Jamie Madill
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TextureStorage11.cpp src/libANGLE/renderer/d3d/d3d11/TextureStorage11.cpp +1 -1

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--- a/src/libANGLE/renderer/d3d/d3d11/TextureStorage11.cpp
+++ b/src/libANGLE/renderer/d3d/d3d11/TextureStorage11.cpp
@@ -175,7 +175,7 @@ gl::Error TextureStorage11::getSRV(const gl::SamplerState &samplerState, ID3D11S
 {
    bool swizzleRequired = samplerState.swizzleRequired();
    bool mipmapping = gl::IsMipmapFiltered(samplerState);
-    unsigned int mipLevels = mipmapping ? (samplerState.maxLevel - samplerState.baseLevel) : 1;
+    unsigned int mipLevels = mipmapping ? (samplerState.maxLevel - samplerState.baseLevel + 1) : 1;
    // Make sure there's 'mipLevels' mipmap levels below the base level (offset by the top level,  which corresponds to GL level 0)
    mipLevels = std::min(mipLevels, mMipLevels - mTopLevel - samplerState.baseLevel);