* drawing api

* add drawing test

* yuv420sp drawing

* enable simpleocv in webassembly build

remove build s390x python wheels

remove build wheel for ppc64le

* quantize and dequantize tests

* unify activation and usability function

* drop NCNN_REQUANT cmake option, test dequantize requantize pack8, fix webassembly build

* benchmark use requantize int8 model

* use local pool allocator

* detach extract feat from local allocator

* fix test

* add test python vulkan

* add python vulkan ci on linux with 3.6 and 3.8

* fix ci vulkan icd

* release python

* fix twine upload only push tags, fix linux bdist_wheel so path error

* fix long_description_content_type

* remove log print

* set cibuildwheel version 1.6.3

* add pyproject.toml

* set release python only on push tag

* add ci build python 2.7

* remove python2.7; update readme.md

Co-authored-by: Cai Shanli <caishanli25@gmail.com>

add test mat, blob and paramdict
fix README.md build
print mat'data in python

fix build python with lastest ncnn

* build shared lib and enable lto

* reserved for layer and option

* allocator pimpl

* datareader pimpl

* paramdict pimpl, disable copy assign for allocator and datareader

* modelbin pimpl

* net extractor pimpl

* gpu pimple

* disable copy assign vulkandevice, code format

* command pimpl, dummy image readonly

* pipeline pipelinecache pimpl, export platform class

* code format, export simple family

* update ci

* disable lto on android armv7, merge webassembly ci

* link libgcc, fix macos dylib version

* pipeline pimpl, gpu info pimpl

* destroy gpu info after vulkan device

* ignore msvc stl class warning

* fix ncnn_paramdict_get_float return type

* fix vktransfer upload fp16 without flatten, add command test

* cmake option for platform api uses
* adroid gpu ci does not rely on glslangvalidator, add android termux ci

* add vs2015 ci
* build x86 binary

* enable ios arm64e

* fix build with old vulkan sdk

* link vulkan loader on macos, fix ios moltenvk library path

* there is no moltenvk arm64e library atm, link moltenvk directly for macos-arm64

* package openmp and glslang together
* find glslang targets in lib64
* define version string
* update moltenvk

Upgrade vulkansdk version:
vulkansdk-macos-1.2.135.0 -> vulkansdk-macos-1.2.162.0

* some ci tweaks

* workaround windows-2016 cache

* codecov for arm32 aarch64, vs2017 ci

* vs2017 default to x86 even on x64 host

* SSE2: BatchNorm

* Fixed batch norm in AVX configuration

* Optimized register size switch

* Attempt to pass CI

* Attempt to pass CI

* Bias op

* Element wise ops

* Support packing on x86 by default

* Fixed macro range in bias

* Use aligned read for packed data

* Update testutil.h

* Update pooling_x86.cpp

* Support wasn SIMD

* Fix emscripten compiler flags

* fix build

* more ci fix

* concat x86 pack4

* flatten x86 pack4

* more x86 pack4

* ci pass

* fix

* enable sse2 mathfun

* enable --experimental-wasm-simd

Co-authored-by: nihui <shuizhuyuanluo@126.com>
Co-authored-by: nihuini <nihuini@tencent.com>

* openmp on webasm works

* fix compile flags

* dynamic kmp runtime initialization

* clang simpleomp ci

* fix dispatch on unique cpu

* reset

* fix build with old vulkan header

* query subgroup features

* compile spirv 1.3

* drop offline spirv build

* do not build tests for android and ios, as they are never tested anyway

* code style

* set cmake NCNN_BUILD_TESTS default off and add -DNCNN_BUILD_TESTS=ON to ci

* Update linux-x64-cpu-gcc.yml

* Update linux-x64-cpu-gcc.yml