Remove ANGLE

This marks the end of EGL and OpenGL ES support on Windows.

The concepts of -opengl dynamic, -opengl desktop, QT_OPENGL=software,
etc. remain unchanged, with the exception of the disapperance of
everything ANGLE related.

CMake builds now work identically to qmake on Windows: they default to
'dynamic' OpenGL on Windows, unless -DINPUT_opengl=desktop is specified.

On Windows, Qt 6 is expected to default to the "dynamic" OpenGL model by
default, just like Qt 5.15. This can be changed by switching to "desktop"
OpenGL, which will link to opengl32 (publicly, so other libs and applications
will do so as well) and disallows using another OpenGL DLL.

The "dynamic" mode is essential still because the fallback to a software
rasterizer, such as the opengl32sw.dll we ship with the Qt packages,
has to to work exactly like in Qt 5, the removal of ANGLE does not
change this concept in any way (except of course that the middle option
of using ANGLE is now gone)

When it comes to the windows plugin's OpenGL blacklist feature, it works
like before and accepts the ANGLE/D3D related keywords. They will
then be ignored. Similarly, requesting QT_OPENGL=angle is ignored (but
will show a warning).

The D3D11 and DXGI configure time tests are removed: Qt 5.14 already
depends on D3D 11.1 and DXGI 1.3 headers being available unconditionally
on Win32 (in QRhi's D3D11 backend). No need to test for these.

[ChangeLog][Windows] ANGLE is no longer included with Qt. Dynamic OpenGL
builds work like before but ANGLE is no longer an option. OpenGL proper
or an alternative opengl32 implementation are the two remaining options
now. Attempting to set QT_OPENGL=angle or Qt::AA_UseOpenGLES will have
no effect on Windows.

Fixes: QTBUG-79103
Change-Id: Ia404e0d07f3fe191b27434d863c81180112ecb3b
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>

1 files changed, 0 insertions, 115 deletions

diff --git a/src/3rdparty/angle/src/third_party/compiler/ArrayBoundsClamper.cpp b/src/3rdparty/angle/src/third_party/compiler/ArrayBoundsClamper.cpp
deleted file mode 100644
index 17e272301a..0000000000
--- a/src/3rdparty/angle/src/third_party/compiler/ArrayBoundsClamper.cpp
+++ /dev/null
@@ -1,115 +0,0 @@
-/*
- * Copyright (C) 2012 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE, INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE, INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "third_party/compiler/ArrayBoundsClamper.h"
-
-#include "compiler/translator/IntermTraverse.h"
-
-// The built-in 'clamp' instruction only accepts floats and returns a float.  I
-// iterated a few times with our driver team who examined the output from our
-// compiler - they said the multiple casts generates more code than a single
-// function call.  An inline ternary operator might have been better, but since
-// the index value might be an expression itself, we'd have to make temporary
-// variables to avoid evaluating the expression multiple times.  And making
-// temporary variables was difficult because ANGLE would then need to make more
-// brutal changes to the expression tree.
-
-const char* kIntClampBegin = "// BEGIN: Generated code for array bounds clamping\n\n";
-const char* kIntClampEnd = "// END: Generated code for array bounds clamping\n\n";
-const char* kIntClampDefinition = "int webgl_int_clamp(int value, int minValue, int maxValue) { return ((value < minValue) ? minValue : ((value > maxValue) ? maxValue : value)); }\n\n";
-
-namespace sh
-{
-
-namespace
-{
-
-class ArrayBoundsClamperMarker : public TIntermTraverser {
-public:
-    ArrayBoundsClamperMarker()
-        : TIntermTraverser(true, false, false),
-          mNeedsClamp(false)
-   {
-   }
-
-    bool visitBinary(Visit visit, TIntermBinary *node) override
-   {
-       if (node->getOp() == EOpIndexIndirect)
-       {
-           TIntermTyped* left = node->getLeft();
-           if (left->isArray() || left->isVector() || left->isMatrix())
-           {
-               node->setAddIndexClamp();
-               mNeedsClamp = true;
-           }
-       }
-       return true;
-   }
-
-    bool GetNeedsClamp() { return mNeedsClamp; }
-
-private:
-    bool mNeedsClamp;
-};
-
-}  // anonymous namespace
-
-ArrayBoundsClamper::ArrayBoundsClamper()
-    : mClampingStrategy(SH_CLAMP_WITH_CLAMP_INTRINSIC)
-    , mArrayBoundsClampDefinitionNeeded(false)
-{
-}
-
-void ArrayBoundsClamper::SetClampingStrategy(ShArrayIndexClampingStrategy clampingStrategy)
-{
-    mClampingStrategy = clampingStrategy;
-}
-
-void ArrayBoundsClamper::MarkIndirectArrayBoundsForClamping(TIntermNode* root)
-{
-    ASSERT(root);
-
-    ArrayBoundsClamperMarker clamper;
-    root->traverse(&clamper);
-    if (clamper.GetNeedsClamp())
-    {
-        SetArrayBoundsClampDefinitionNeeded();
-    }
-}
-
-void ArrayBoundsClamper::OutputClampingFunctionDefinition(TInfoSinkBase& out) const
-{
-    if (!mArrayBoundsClampDefinitionNeeded)
-    {
-        return;
-    }
-    if (mClampingStrategy != SH_CLAMP_WITH_USER_DEFINED_INT_CLAMP_FUNCTION)
-    {
-        return;
-    }
-    out << kIntClampBegin << kIntClampDefinition << kIntClampEnd;
-}
-
-}  // namespace sh