/****************************************************************************
Copyright (c) 2018-2019 Xiamen Yaji Software Co., Ltd.
http://www.cocos2d-x.org
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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****************************************************************************/
#pragma once
#include "../Macros.h"
#include "../Types.h"
#import <Metal/Metal.h>
#include <functional>
CC_BACKEND_BEGIN
/**
* @addtogroup _metal
* @{
*/
* create and manager default depth and stencil attachment.
* generate mipmaps.
* read pixles from texture.
class Utils
{
public:
* Update default color attachment texture.
* @param texture Specifies the texture to be setted to the color attachemnt.
static void updateDefaultColorAttachmentTexture(id<MTLTexture> texture);
static void resizeDefaultAttachmentTexture(int width, int height);
* Get the default combined depth and stencil attachment pixel format.
* @return The default combined depth and stencil attachment pixel format.
static MTLPixelFormat getDefaultDepthStencilAttachmentPixelFormat();
* Get the default color attachment pixel format.
* @return The default color attachment pixel format.
static MTLPixelFormat getDefaultColorAttachmentPixelFormat();
* Get the default combined depth and stencil texture.
* @return The default combined depth and stencil texture.
static id<MTLTexture> getDefaultDepthStencilTexture();
* Convert backend::PixelFormat to MTLPixelFormat.
* @param textureFormat Specifies a pixel format to be converted.
* @return A MTLPixelFormat.
static MTLPixelFormat toMTLPixelFormat(PixelFormat textureFormat);
* Generate a complete set of mipmaps in given texture.
* @param texture Specifies a texture to generate mipmap.
static void generateMipmaps(id<MTLTexture> texture);
* Read a block of pixels from the given texture
* @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.
* @param rectWidth,rectHeight Specify the dimensions of the pixel rectangle. rectWidth and rectHeight of one correspond to a single pixel.
* @param texture Specifies the texture to get the image.
* @param callback Specifies a call back function to deal with the image.
static void getTextureBytes(int origX, int origY, int rectWidth, int rectHeight, id<MTLTexture> texture, std::function<void(const unsigned char*, int, int)> callback);
* Swizzle the iamge form the given format to MTLPixelFormatRGBA8Unorm.
* @param image Specifies the image to be swizzled.
* @param width Specifies the width of the image.
* @param heigth Specifies the height of the image.
* @param format Specifies the format of the image.
static void swizzleImage(unsigned char* image, int width, int height, MTLPixelFormat format);
private:
static id<MTLTexture> createDepthStencilAttachmentTexture();
static id<MTLTexture> _defaultColorAttachmentTexture;
static id<MTLTexture> _defaultDepthStencilAttachmentTexture;
};
// end of _metal group
/// @}
CC_BACKEND_END