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-rwxr-xr-xgfx/angle/src/libANGLE/IndexRangeCache.cpp113
1 files changed, 113 insertions, 0 deletions
diff --git a/gfx/angle/src/libANGLE/IndexRangeCache.cpp b/gfx/angle/src/libANGLE/IndexRangeCache.cpp
new file mode 100755
index 000000000..4f165c1b2
--- /dev/null
+++ b/gfx/angle/src/libANGLE/IndexRangeCache.cpp
@@ -0,0 +1,113 @@
+//
+// Copyright (c) 2013 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// IndexRangeCache.cpp: Defines the gl::IndexRangeCache class which stores information about
+// ranges of indices.
+
+#include "libANGLE/IndexRangeCache.h"
+
+#include "common/debug.h"
+#include "libANGLE/formatutils.h"
+
+namespace gl
+{
+
+void IndexRangeCache::addRange(GLenum type,
+ size_t offset,
+ size_t count,
+ bool primitiveRestartEnabled,
+ const IndexRange &range)
+{
+ mIndexRangeCache[IndexRangeKey(type, offset, count, primitiveRestartEnabled)] = range;
+}
+
+bool IndexRangeCache::findRange(GLenum type,
+ size_t offset,
+ size_t count,
+ bool primitiveRestartEnabled,
+ IndexRange *outRange) const
+{
+ auto i = mIndexRangeCache.find(IndexRangeKey(type, offset, count, primitiveRestartEnabled));
+ if (i != mIndexRangeCache.end())
+ {
+ if (outRange)
+ {
+ *outRange = i->second;
+ }
+ return true;
+ }
+ else
+ {
+ if (outRange)
+ {
+ *outRange = IndexRange();
+ }
+ return false;
+ }
+}
+
+void IndexRangeCache::invalidateRange(size_t offset, size_t size)
+{
+ size_t invalidateStart = offset;
+ size_t invalidateEnd = offset + size;
+
+ auto i = mIndexRangeCache.begin();
+ while (i != mIndexRangeCache.end())
+ {
+ size_t rangeStart = i->first.offset;
+ size_t rangeEnd = i->first.offset + (GetTypeInfo(i->first.type).bytes * i->first.count);
+
+ if (invalidateEnd < rangeStart || invalidateStart > rangeEnd)
+ {
+ ++i;
+ }
+ else
+ {
+ mIndexRangeCache.erase(i++);
+ }
+ }
+}
+
+void IndexRangeCache::clear()
+{
+ mIndexRangeCache.clear();
+}
+
+IndexRangeCache::IndexRangeKey::IndexRangeKey()
+ : IndexRangeCache::IndexRangeKey(GL_NONE, 0, 0, false)
+{
+}
+
+IndexRangeCache::IndexRangeKey::IndexRangeKey(GLenum type_,
+ size_t offset_,
+ size_t count_,
+ bool primitiveRestartEnabled_)
+ : type(type_), offset(offset_), count(count_), primitiveRestartEnabled(primitiveRestartEnabled_)
+{
+}
+
+bool IndexRangeCache::IndexRangeKey::operator<(const IndexRangeKey &rhs) const
+{
+ if (type != rhs.type)
+ {
+ return type < rhs.type;
+ }
+ if (offset != rhs.offset)
+ {
+ return offset < rhs.offset;
+ }
+ if (count != rhs.count)
+ {
+ return count < rhs.count;
+ }
+ if (primitiveRestartEnabled != rhs.primitiveRestartEnabled)
+ {
+ return primitiveRestartEnabled;
+ }
+ return false;
+}
+
+}