mirror of https://github.com/axmolengine/axmol.git
114 lines
4.3 KiB
C
114 lines
4.3 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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#import <Metal/Metal.h>
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#include <functional>
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CC_BACKEND_BEGIN
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/**
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* @addtogroup _metal
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* @{
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*/
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/**
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* create and manager default depth and stencil attachment.
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* generate mipmaps.
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* read pixles from texture.
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*/
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class Utils
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{
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public:
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/**
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* Update default color attachment texture.
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* @param texture Specifies the texture to be setted to the color attachemnt.
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*/
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static void updateDefaultColorAttachmentTexture(id<MTLTexture> texture);
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static void resizeDefaultAttachmentTexture(std::size_t width, std::size_t height);
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/**
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* Get the default combined depth and stencil attachment pixel format.
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* @return The default combined depth and stencil attachment pixel format.
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*/
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static MTLPixelFormat getDefaultDepthStencilAttachmentPixelFormat();
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/**
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* Get the default color attachment pixel format.
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* @return The default color attachment pixel format.
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*/
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static MTLPixelFormat getDefaultColorAttachmentPixelFormat();
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/**
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* Get the default combined depth and stencil texture.
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* @return The default combined depth and stencil texture.
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*/
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static id<MTLTexture> getDefaultDepthStencilTexture();
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/**
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* Convert backend::PixelFormat to MTLPixelFormat.
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* @param textureFormat Specifies a pixel format to be converted.
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* @return A MTLPixelFormat.
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*/
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static MTLPixelFormat toMTLPixelFormat(PixelFormat textureFormat);
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/**
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* Generate a complete set of mipmaps in given texture.
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* @param texture Specifies a texture to generate mipmap.
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*/
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static void generateMipmaps(id<MTLTexture> texture);
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/**
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* Read a block of pixels from the given texture
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* @param origX,origY Specify the window coordinates of the first pixel that is read from the given texture. This location is the lower left corner of a rectangular block of pixels.
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* @param rectWidth,rectHeight Specify the dimensions of the pixel rectangle. rectWidth and rectHeight of one correspond to a single pixel.
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* @param texture Specifies the texture to get the image.
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* @param callback Specifies a call back function to deal with the image.
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*/
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static void getTextureBytes(std::size_t origX, std::size_t origY, std::size_t rectWidth, std::size_t rectHeight, id<MTLTexture> texture, std::function<void(const unsigned char*, std::size_t, std::size_t)> callback);
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/**
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* Swizzle the iamge form the given format to MTLPixelFormatRGBA8Unorm.
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* @param image Specifies the image to be swizzled.
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* @param width Specifies the width of the image.
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* @param heigth Specifies the height of the image.
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* @param format Specifies the format of the image.
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*/
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static void swizzleImage(unsigned char* image, std::size_t width, std::size_t height, MTLPixelFormat format);
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private:
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static id<MTLTexture> createDepthStencilAttachmentTexture();
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static id<MTLTexture> _defaultColorAttachmentTexture;
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static id<MTLTexture> _defaultDepthStencilAttachmentTexture;
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};
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// end of _metal group
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/// @}
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CC_BACKEND_END
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