D3D11: Fix respecifying 3D textures.

src/libANGLE/renderer/d3d/d3d11/Image11.cpp

@@ -225,8 +225,8 @@ bool Image11::redefine(gl::TextureType type,
                        const gl::Extents &size,
                        bool forceRelease)
 {
-    if (mWidth != size.width || mHeight != size.height || mInternalFormat != internalformat ||
-        forceRelease)
+    if (mWidth != size.width || mHeight != size.height || mDepth != size.depth ||
+        mInternalFormat != internalformat || forceRelease)
     {
         // End the association with the TextureStorage, since that data will be out of date.
         // Also reset mRecoveredFromStorageCount since this Image is getting completely redefined.

src/tests/gl_tests/MipmapTest.cpp

@@ -2070,6 +2070,22 @@ void main()
     EXPECT_PIXEL_COLOR_EQ(getWindowWidth() / 8, getWindowHeight() / 8, GLColor::green);
 }
 
+// Tests respecifying 3D mipmaps.
+TEST_P(MipmapTestES3, Generate3DMipmapRespecification)
+{
+    std::vector<GLColor> pixels(256 * 256 * 100, GLColor::black);
+
+    GLTexture texture;
+    glBindTexture(GL_TEXTURE_3D, texture);
+    glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA, 256, 256, 100, 0, GL_RGBA, GL_UNSIGNED_BYTE,
+                 pixels.data());
+    glTexImage3D(GL_TEXTURE_3D, 1, GL_RGBA, 128, 128, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
+                 pixels.data());
+    glGenerateMipmap(GL_TEXTURE_3D);
+
+    ASSERT_GL_NO_ERROR();
+}
+
 // Use this to select which configurations (e.g. which renderer, which GLES major version) these
 // tests should be run against.
 ANGLE_INSTANTIATE_TEST_ES2_AND_ES3(MipmapTest);