349 lines
7.5 KiB
C++
349 lines
7.5 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) 2003-2015 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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*/
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#include <nana/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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#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 "detail/image_ico.hpp"
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namespace nana
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{
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namespace paint
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{
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namespace detail
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{
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//class image_ico
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image_ico::image_ico(bool is_ico): is_ico_(is_ico){}
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bool image_ico::open(const nana::experimental::filesystem::path& file)
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{
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close();
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#if defined(NANA_WINDOWS)
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HICON handle = 0;
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if(is_ico_)
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{
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handle = (HICON)::LoadImage(0, file.c_str(), IMAGE_ICON, 0, 0, LR_LOADFROMFILE);
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}
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else
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{
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SHFILEINFO sfi;
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::SHGetFileInfo(file.c_str(), 0, &sfi, sizeof(sfi), SHGFI_ICON);
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handle = sfi.hIcon;
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}
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if(handle)
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{
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HICON * p = new HICON(handle);
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ptr_ = std::shared_ptr<HICON>(p, handle_deleter());
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ICONINFO info;
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::GetIconInfo(handle, &info);
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size_.width = (info.xHotspot << 1);
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size_.height = (info.yHotspot << 1);
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::DeleteObject(info.hbmColor);
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::DeleteObject(info.hbmMask);
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return true;
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}
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#else
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if(is_ico_){} //kill the unused compiler warning in Linux.
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#endif
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return false;
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}
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bool image_ico::open(const void* data, std::size_t bytes)
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{
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close();
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#if defined(NANA_WINDOWS)
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HICON handle = ::CreateIconFromResource((PBYTE)data, static_cast<DWORD>(bytes), TRUE, 0x00030000);
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if(handle)
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{
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ICONINFO info;
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if (::GetIconInfo(handle, &info) != 0)
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{
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HICON * p = new HICON(handle);
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ptr_ = std::shared_ptr<HICON>(p, handle_deleter());
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size_.width = (info.xHotspot << 1);
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size_.height = (info.yHotspot << 1);
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::DeleteObject(info.hbmColor);
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::DeleteObject(info.hbmMask);
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return true;
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}
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}
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#else
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if(is_ico_){} //kill the unused compiler warning in Linux.
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#endif
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return false;
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}
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bool image_ico::alpha_channel() const
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{
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return false;
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}
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bool image_ico::empty() const
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{
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return (nullptr == ptr_);
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}
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void image_ico::close()
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{
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ptr_.reset();
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}
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nana::size image_ico::size() const
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{
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return size_;
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}
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void image_ico::paste(const nana::rectangle& src_r, graph_reference graph, const point& p_dst) const
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{
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if(ptr_ && (graph.empty() == false))
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{
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#if defined(NANA_WINDOWS)
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::DrawIconEx(graph.handle()->context, p_dst.x, p_dst.y, *ptr_, src_r.width, src_r.height, 0, 0, DI_NORMAL);
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#endif
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}
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}
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void image_ico::stretch(const nana::rectangle&, graph_reference graph, const nana::rectangle& r) const
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{
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if(ptr_ && (graph.empty() == false))
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{
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#if defined(NANA_WINDOWS)
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::DrawIconEx(graph.handle()->context, r.x, r.y, *ptr_, r.width, r.height, 0, 0, DI_NORMAL);
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#endif
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}
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}
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const image_ico::ptr_t& image_ico::ptr() const
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{
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return ptr_;
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}
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#if defined(NANA_WINDOWS)
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//struct handle_deleter
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void image_ico::handle_deleter::operator()(HICON* p) const
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{
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if(p && *p)
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::DestroyIcon(*p);
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delete p;
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}
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//end struct handle_deleter
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#endif
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//end class image_ico
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}
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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()
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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 ::nana::experimental::filesystem::path& 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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bool image::open(const ::nana::experimental::filesystem::path& file)
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{
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image_ptr_.reset();
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auto extension = file.extension().native();
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if (extension.empty())
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return false;
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image::image_impl_interface * helper = nullptr;
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{
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std::transform(extension.begin(), extension.end(), extension.begin(), std::tolower);
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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 == extension)
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{
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#if defined(NANA_WINDOWS)
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helper = new detail::image_ico(true);
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#else
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return false;
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#endif
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break;
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}
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if (ext_png == extension)
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{
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#if defined(NANA_ENABLE_PNG)
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helper = new detail::image_png;
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#else
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return false;
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#endif
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break;
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}
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if (ext_jpg == extension || ext_jpeg == extension)
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{
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#if defined(NANA_ENABLE_JPEG)
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helper = new detail::image_jpeg;
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#else
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return false;
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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 (!helper)
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{
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std::ifstream ifs(file.c_str(), std::ios::binary);
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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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helper = new detail::image_bmp;
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else if (*reinterpret_cast<const short*>("MZ") == meta)
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helper = new detail::image_ico(false);
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}
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}
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if (helper)
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{
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image_ptr_ = std::shared_ptr<image_impl_interface>(helper);
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return helper->open(file.c_str());
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}
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}
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return false;
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}
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bool image::open_icon(const void* data, std::size_t bytes)
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{
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image::image_impl_interface * helper = new detail::image_ico(true);
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image_ptr_ = std::shared_ptr<image_impl_interface>(helper);
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return helper->open(data, bytes);
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}
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bool image::empty() const
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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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void image::close()
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{
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image_ptr_.reset();
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}
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bool image::alpha() const
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{
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return (image_ptr_ ? image_ptr_->alpha_channel() : false);
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}
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nana::size image::size() const
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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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