mirror of https://github.com/axmolengine/axmol.git
117 lines
3.9 KiB
C
117 lines
3.9 KiB
C
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/****************************************************************************
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Copyright (c) 2018-2019 Xiamen Yaji Software Co., Ltd.
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#pragma once
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#include "Macros.h"
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#include "Types.h"
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#include "base/CCRef.h"
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#include <string>
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#include <cstdint>
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#include <vector>
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#include <unordered_map>
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CC_BACKEND_BEGIN
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/**
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* @addtogroup _backend
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* @{
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*/
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/**
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* Store vertex attribute layout.
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*/
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class VertexLayout
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{
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public:
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struct Attribute
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{
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Attribute() = default;
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Attribute(const std::string& _name, std::size_t _index, VertexFormat _format, std::size_t _offset, bool needToBeNormallized)
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: name(_name)
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, format(_format)
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, offset(_offset)
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, index(_index)
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, needToBeNormallized(needToBeNormallized)
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{}
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std::string name; ///< name is used in opengl
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VertexFormat format = VertexFormat::INT3;
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std::size_t offset = 0;
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std::size_t index = 0; ///< index is used in metal
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bool needToBeNormallized = false;
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};
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VertexLayout() = default;
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/**
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* Set attribute values to name.
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* @param name Specifies the attribute name.
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* @param index Specifies the index of the generic vertex attribute to be modified.
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* @param format Specifies how the vertex attribute data is laid out in memory.
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* @param offset Specifies the byte offset to the first component of the first generic vertex attribute.
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* @param needToBeNormallized Specifies whether fixed-point data values should be normalized (true) or converted directly as fixed-point values (false) when they are accessed.
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*/
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void setAttribute(const std::string& name, std::size_t index, VertexFormat format, std::size_t offset, bool needToBeNormallized);
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/**
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* Set stride of vertices.
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* @param stride Specifies the distance between the data of two vertices, in bytes.
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*/
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void setLayout(std::size_t stride);
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/**
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* Get the distance between the data of two vertices, in bytes.
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* @return The distance between the data of two vertices, in bytes.
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*/
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inline std::size_t getStride() const { return _stride; }
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/**
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* Get vertex step function. Default value is VERTEX.
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* @return Vertex step function.
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* @note Used in metal.
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*/
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inline VertexStepMode getVertexStepMode() const { return _stepMode; }
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/**
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* Get attribute informations
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* @return Atrribute informations.
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*/
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inline const std::unordered_map<std::string, Attribute>& getAttributes() const { return _attributes; }
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/**
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* Check if vertex layout has been set.
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*/
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inline bool isValid() const { return _stride != 0; }
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private:
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std::unordered_map<std::string, Attribute> _attributes;
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std::size_t _stride = 0;
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VertexStepMode _stepMode = VertexStepMode::VERTEX;
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};
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//end of _backend group
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/// @}
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CC_BACKEND_END
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