322 lines
7.1 KiB
C++
322 lines
7.1 KiB
C++
/*
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* Paint Image Implementation
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* Nana C++ Library(http://www.nanapro.org)
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* Copyright(C) 2003-2017 Jinhao(cnjinhao@hotmail.com)
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*
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*
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* @file: nana/paint/image.cpp
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* @contributors:
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* nabijaczleweli(pr#106)
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*/
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#include <nana/push_ignore_diagnostic>
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#include "../detail/platform_spec_selector.hpp"
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#include <nana/paint/image.hpp>
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#include <algorithm>
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#include <fstream>
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#include <iterator>
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#include <stdexcept>
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#include <nana/paint/detail/image_impl_interface.hpp>
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#include <nana/paint/pixel_buffer.hpp>
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#include <nana/filesystem/filesystem_ext.hpp>
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#if defined(NANA_ENABLE_JPEG)
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#include "detail/image_jpeg.hpp"
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#endif
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#if defined(NANA_ENABLE_PNG)
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#include "detail/image_png.hpp"
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#endif
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#include "detail/image_bmp.hpp"
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#include "image_accessor.hpp"
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#include "detail/image_ico_resource.hpp"
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#include "detail/image_ico.hpp"
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namespace fs = std::filesystem;
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namespace nana
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{
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namespace paint
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{
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#if defined(NANA_WINDOWS)
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HICON image_accessor::icon(const nana::paint::image& img)
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{
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auto ico_res = dynamic_cast<paint::detail::image_ico_resource*>(img.image_ptr_.get());
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if (ico_res)
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return reinterpret_cast<HICON>(ico_res->native_handle());
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auto ico = dynamic_cast<paint::detail::image_ico*>(img.image_ptr_.get());
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if (ico)
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return reinterpret_cast<HICON>(ico->native_handle());
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return nullptr;
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}
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#else
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int image_accessor::icon(const image&)
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{
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return 0;
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}
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#endif
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image::image_impl_interface::~image_impl_interface()
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{}
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//class image
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image::image() noexcept
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{}
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image::image(const image& rhs)
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: image_ptr_(rhs.image_ptr_)
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{}
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image::image(image&& r)
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: image_ptr_(std::move(r.image_ptr_))
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{}
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image::image(const std::string& file)
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{
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open(file);
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}
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image::image(const std::wstring& file)
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{
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open(file);
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}
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image::~image()
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{
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close();
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}
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image& image::operator=(const image& r)
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{
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if(this != &r)
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image_ptr_ = r.image_ptr_;
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return * this;
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}
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image& image::operator=(image&& r)
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{
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if(this != &r)
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image_ptr_ = std::move(r.image_ptr_);
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return *this;
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}
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std::shared_ptr<image::image_impl_interface> create_image(const fs::path & p)
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{
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std::shared_ptr<image::image_impl_interface> ptr;
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auto ext = p.extension().native();
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if (ext.empty())
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return ptr;
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std::transform(ext.begin(), ext.end(), ext.begin(), [](int ch)
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{
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if ('A' <= ch && ch <= 'Z')
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ch -= ('A' - 'a');
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return ch;
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});
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#if defined(NANA_WINDOWS)
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const wchar_t* ext_ico = L".ico";
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const wchar_t* ext_png = L".png";
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const wchar_t* ext_jpg = L".jpg";
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const wchar_t* ext_jpeg = L".jpeg";
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#else
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const char* ext_ico = ".ico";
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const char* ext_png = ".png";
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const char* ext_jpg = ".jpg";
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const char* ext_jpeg = ".jpeg";
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#endif
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do
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{
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if (ext_ico == ext)
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{
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ptr = std::make_shared<detail::image_ico>();
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break;
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}
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if (ext_png == ext)
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{
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#if defined(NANA_ENABLE_PNG)
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ptr = std::make_shared<detail::image_png>();
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#else
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return ptr;
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#endif
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break;
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}
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if (ext_jpg == ext || ext_jpeg == ext)
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{
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#if defined(NANA_ENABLE_JPEG)
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ptr = std::make_shared<detail::image_jpeg>();
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#else
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return ptr;
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#endif
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break;
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}
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} while (false);
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//Check for BMP
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if (!ptr)
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{
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#ifndef NANA_MINGW
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std::ifstream ifs(p.c_str(), std::ios::binary);
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#else
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std::ifstream ifs(to_osmbstr(to_utf8(p.native())).c_str(), std::ios::binary);
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#endif
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if (ifs)
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{
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unsigned short meta = 0;
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ifs.read(reinterpret_cast<char*>(&meta), 2);
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if (*reinterpret_cast<const short*>("BM") == meta)
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ptr = std::make_shared<detail::image_bmp>();
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else if (*reinterpret_cast<const short*>("MZ") == meta)
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ptr = std::make_shared<detail::image_ico_resource>();
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}
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}
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return ptr;
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}
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bool image::open(const ::std::string& file)
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{
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fs::path path(file);
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image_ptr_ = create_image(path);
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return (image_ptr_ ? image_ptr_->open(path) : false);
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}
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bool image::open(const std::wstring& file)
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{
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fs::path path(file);
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image_ptr_ = create_image(path);
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return (image_ptr_ ? image_ptr_->open(path) : false);
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}
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bool image::open(const void* data, std::size_t bytes)
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{
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close();
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if (bytes > 2)
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{
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std::shared_ptr<image::image_impl_interface> ptr;
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auto meta = *reinterpret_cast<const unsigned short*>(data);
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if (*reinterpret_cast<const short*>("BM") == meta)
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ptr = std::make_shared<detail::image_bmp>();
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else if (*reinterpret_cast<const short*>("MZ") == meta)
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ptr = std::make_shared<detail::image_ico_resource>();
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else
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{
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if (bytes > 8 && (0x474e5089 == *reinterpret_cast<const unsigned*>(data)))
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{
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#if defined(NANA_ENABLE_PNG)
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ptr = std::make_shared<detail::image_png>();
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#endif
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}
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else
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{
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#if defined(NANA_ENABLE_JPEG)
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//JFIF
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if (bytes > 11 && (0xe0ffd8ff == *reinterpret_cast<const unsigned*>(data)) && 0x4649464A == *reinterpret_cast<const unsigned*>(reinterpret_cast<const char*>(data)+6))
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ptr = std::make_shared<detail::image_jpeg>();
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else if (bytes > 9 && (0x66697845 == *reinterpret_cast<const unsigned*>(reinterpret_cast<const char*>(data)+5))) //Exif
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ptr = std::make_shared<detail::image_jpeg>();
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#endif
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if ((!ptr) && (bytes > 40))
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{
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switch (*reinterpret_cast<const unsigned*>(data))
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{
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case 40:
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case 0x00010000:
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if (!ptr && bytes > 40)
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ptr = std::make_shared<detail::image_ico>();
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}
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}
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}
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}
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if (ptr)
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{
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image_ptr_.swap(ptr);
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return image_ptr_->open(data, bytes);
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}
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}
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return false;
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}
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bool image::empty() const noexcept
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{
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return ((nullptr == image_ptr_) || image_ptr_->empty());
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}
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image::operator unspecified_bool_t() const
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{
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return (image_ptr_ ? &image::empty : nullptr);
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}
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//Fixed missing noexcept specifier by nabijaczleweli(pr#106)
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void image::close() noexcept
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{
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image_ptr_.reset();
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}
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//Fixed missing noexcept specifier by nabijaczleweli(pr#106)
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bool image::alpha() const noexcept
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{
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return (image_ptr_ ? image_ptr_->alpha_channel() : false);
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}
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//Fixed missing noexcept specifier by nabijaczleweli(pr#106)
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nana::size image::size() const noexcept
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{
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return (image_ptr_ ? image_ptr_->size() : nana::size());
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}
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void image::paste(graphics& dst, const point& p_dst) const
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{
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this->paste(rectangle{ this->size() }, dst, p_dst);
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}
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void image::paste(const rectangle& r_src, graphics & dst, const point& p_dst) const
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{
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if (image_ptr_)
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{
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if (dst.empty())
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dst.make({ r_src.width, r_src.height }); //throws if failed to create
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image_ptr_->paste(r_src, dst, p_dst);
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}
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else
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throw std::runtime_error("image is empty");
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}
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void image::stretch(const nana::rectangle& r_src, graphics& dst, const nana::rectangle & r_dst) const
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{
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if (image_ptr_)
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{
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if (dst.empty())
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dst.make({ r_src.width, r_src.height }); //throws if failed to create
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image_ptr_->stretch(r_src, dst, r_dst);
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}
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else
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throw std::runtime_error("image is empty");
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}
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//end class image
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}//end namespace paint
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}//end namespace nana
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