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100 lines
3.0 KiB
100 lines
3.0 KiB
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// This is almost literally
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// external/angle/src/common/mathutil.h: IndexRange +
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// external/angle/src/libANGLE/IndexRangeCache.h: IndexRangeCache,
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// with adaptations to work with goldfish opengl driver.
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// Currently, primitive restart is not supported, so there
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// is a very minimal incorporation of that.
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#ifndef _GL_INDEX_RANGE_CACHE_H_
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#define _GL_INDEX_RANGE_CACHE_H_
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#include <GLES/gl.h>
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#include <GLES/glext.h>
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#include <GLES2/gl2.h>
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#include <GLES2/gl2ext.h>
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#include "glUtils.h"
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#include <map>
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struct IndexRange {
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// Inclusive range of indices that are not primitive restart
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int start;
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int end;
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// Number of non-primitive restart indices
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size_t vertexIndexCount; // TODO; not being accounted yet (GLES3 feature)
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};
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class IndexRangeCache {
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public:
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void addRange(GLenum type,
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size_t offset,
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size_t count,
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bool primitiveRestartEnabled,
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int start,
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int end);
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bool findRange(GLenum type,
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size_t offset,
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size_t count,
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bool primitiveRestartEnabled,
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int* start_out,
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int* end_out) const;
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void invalidateRange(size_t offset, size_t size);
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void clear();
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private:
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struct IndexRangeKey {
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IndexRangeKey() :
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type(GL_NONE),
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offset(0),
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count(0),
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primitiveRestartEnabled(false) { }
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IndexRangeKey(GLenum _type,
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size_t _offset,
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size_t _count,
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bool _primitiveRestart) :
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type(_type),
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offset(_offset),
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count(_count),
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primitiveRestartEnabled(_primitiveRestart) { }
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bool operator<(const IndexRangeKey& rhs) const {
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size_t end = offset + count * glSizeof(type);
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size_t end_other = rhs.offset + rhs.count * glSizeof(rhs.type);
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if (offset != rhs.offset) return offset < rhs.offset;
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if (end != end_other) return end < end_other;
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if (type != rhs.type) return type < rhs.type;
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if (primitiveRestartEnabled != rhs.primitiveRestartEnabled)
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return primitiveRestartEnabled;
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return false;
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}
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GLenum type;
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size_t offset;
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size_t count;
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bool primitiveRestartEnabled;
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};
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typedef std::map<IndexRangeKey, IndexRange> IndexRangeMap;
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IndexRangeMap mIndexRangeCache;
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};
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#endif
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