3012446f02
To support decoding and enhanced encoding of Draco compressed glTF files. Differential Revision: https://developer.blender.org/D9642
78 lines
1.7 KiB
C++
78 lines
1.7 KiB
C++
/*
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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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#include "common.h"
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#include <cstring>
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size_t getNumberOfComponents(char *dataType)
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{
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if (!strcmp(dataType, "SCALAR"))
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{
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return 1;
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}
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if (!strcmp(dataType, "VEC2"))
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{
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return 2;
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}
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if (!strcmp(dataType, "VEC3"))
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{
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return 3;
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}
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if (!strcmp(dataType, "VEC4"))
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{
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return 4;
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}
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if (!strcmp(dataType, "MAT2"))
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{
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return 4;
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}
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if (!strcmp(dataType, "MAT3"))
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{
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return 9;
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}
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if (!strcmp(dataType, "MAT4"))
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{
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return 16;
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}
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return 0;
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}
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size_t getComponentByteLength(size_t componentType)
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{
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switch (componentType)
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{
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case ComponentType::Byte:
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case ComponentType::UnsignedByte:
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return 1;
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case ComponentType::Short:
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case ComponentType::UnsignedShort:
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return 2;
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case ComponentType::UnsignedInt:
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case ComponentType::Float:
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return 4;
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default:
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return 0;
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}
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}
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size_t getAttributeStride(size_t componentType, char *dataType)
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{
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return getComponentByteLength(componentType) * getNumberOfComponents(dataType);
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}
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