add some missing files, refactor group
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Jinhao
371
source/paint/detail/image_bmp.hpp
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371
source/paint/detail/image_bmp.hpp
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/*
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* Bitmap Format Graphics 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/detail/image_bmp.hpp
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* @contributors: Ryan Gonzalez
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*/
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#ifndef NANA_PAINT_DETAIL_IMAGE_BMP_HPP
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#define NANA_PAINT_DETAIL_IMAGE_BMP_HPP
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#include <nana/paint/detail/image_impl_interface.hpp>
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#include <memory>
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namespace nana{ namespace paint
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{
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namespace detail
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{
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#ifndef NANA_WINDOWS
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struct bitmap_file_header
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{
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unsigned short bfType;
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unsigned long bfSize;
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unsigned short bfReserved1;
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unsigned short bfReserved2;
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unsigned long bfOffBits;
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} __attribute__((packed));
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struct bitmap_info_header {
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unsigned long biSize;
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long biWidth;
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long biHeight;
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unsigned short biPlanes;
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unsigned short biBitCount;
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unsigned long biCompression;
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unsigned long biSizeImage;
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long biXPelsPerMeter;
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long biYPelsPerMeter;
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unsigned long biClrUsed;
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unsigned long biClrImportant;
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}__attribute__((packed));
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struct rgb_quad
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{
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unsigned char rgbBlue;
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unsigned char rgbGreen;
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unsigned char rgbRed;
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unsigned char rgbReserved;
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};
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struct bitmap_info
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{
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bitmap_info_header bmiHeader;
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rgb_quad bmiColors[1];
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}__attribute__((packed));
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#else
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typedef BITMAPFILEHEADER bitmap_file_header;
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typedef BITMAPINFO bitmap_info;
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typedef RGBQUAD rgb_quad;
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#endif
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class image_bmp
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:public image::image_impl_interface
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{
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public:
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image_bmp(){}
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~image_bmp()
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{
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this->close();
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}
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bool open(const nana::char_t* filename) override
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{
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if(nullptr == filename) return false;
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std::ifstream ifs;
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#if defined(NANA_UNICODE)
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ifs.open(static_cast<std::string>(nana::charset(filename)).c_str(), std::ios::binary);
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#else
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ifs.open(filename, std::ios::binary);
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#endif
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if(ifs)
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{
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ifs.seekg(0, std::ios::end);
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auto size = ifs.tellg();
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ifs.seekg(0, std::ios::beg);
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if(size <= static_cast<int>(sizeof(bitmap_file_header)))
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return false;
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std::unique_ptr<char[]> buffer(new char[static_cast<int>(size)]);
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ifs.read(buffer.get(), size);
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if(size == ifs.gcount())
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{
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bitmap_file_header * header = reinterpret_cast<bitmap_file_header*>(buffer.get());
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if((header->bfType == 0x4D42) && (static_cast<std::streamsize>(header->bfSize) == size))
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{
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unsigned char* bits = reinterpret_cast<unsigned char*>(buffer.get() + header->bfOffBits);
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bitmap_info * info = reinterpret_cast<bitmap_info *>(header + 1);
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//Bitmap file is 4byte-aligned for each line.
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std::size_t bytes_per_line;
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const std::size_t height_pixels = std::abs(info->bmiHeader.biHeight);
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if(0 == info->bmiHeader.biSizeImage)
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bytes_per_line = (((info->bmiHeader.biWidth * info->bmiHeader.biBitCount + 31) & ~31) >> 3);
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else
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bytes_per_line = info->bmiHeader.biSizeImage / height_pixels;
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pixbuf_.open(info->bmiHeader.biWidth, height_pixels);
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auto d = pixbuf_.raw_ptr(0);
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if(16 <= info->bmiHeader.biBitCount)
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{
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pixbuf_.put(bits, info->bmiHeader.biWidth, height_pixels, info->bmiHeader.biBitCount, bytes_per_line, (info->bmiHeader.biHeight < 0));
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}
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else if(8 == info->bmiHeader.biBitCount)
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{
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const auto lend = d + info->bmiHeader.biWidth * height_pixels;
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if(info->bmiHeader.biHeight < 0)
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{
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auto s = bits;
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while(d < lend)
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{
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auto d_p = d;
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auto dpend = d_p + info->bmiHeader.biWidth;
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auto s_p = s;
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while(d_p != dpend)
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{
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rgb_quad & rgb = info->bmiColors[*s_p++];
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d_p->element.red = rgb.rgbRed;
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d_p->element.green = rgb.rgbGreen;
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d_p->element.blue = rgb.rgbBlue;
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d_p->element.alpha_channel = rgb.rgbReserved;
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++d_p;
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}
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d = dpend;
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s += bytes_per_line;
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}
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}
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else
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{
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const auto* s = bits + bytes_per_line * (height_pixels - 1);
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while(d < lend)
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{
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auto d_p = d;
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auto* const dpend = d_p + info->bmiHeader.biWidth;
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const auto * s_p = s;
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while(d_p != dpend)
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{
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rgb_quad & rgb = info->bmiColors[*s_p++];
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d_p->element.red = rgb.rgbRed;
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d_p->element.green = rgb.rgbGreen;
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d_p->element.blue = rgb.rgbBlue;
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d_p->element.alpha_channel = rgb.rgbReserved;
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++d_p;
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}
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d = dpend;
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s -= bytes_per_line;
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}
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}
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}
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else if(4 == info->bmiHeader.biBitCount)
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{
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const auto * const lend = d + info->bmiHeader.biWidth * height_pixels;
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if(info->bmiHeader.biHeight < 0)
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{
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const unsigned char* s = bits;
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while(d < lend)
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{
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auto d_p = d;
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auto * const dpend = d_p + info->bmiHeader.biWidth;
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unsigned index = 0;
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while(d_p != dpend)
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{
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rgb_quad & rgb = info->bmiColors[(index & 1) ? (s[index >> 1] & 0xF) : (s[index >> 1] & 0xF0) >> 4];
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d_p->element.red = rgb.rgbRed;
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d_p->element.green = rgb.rgbGreen;
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d_p->element.blue = rgb.rgbBlue;
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d_p->element.alpha_channel = rgb.rgbReserved;
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++d_p;
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++index;
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}
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d = dpend;
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s += bytes_per_line;
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}
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}
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else
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{
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const auto* s = bits + bytes_per_line * (height_pixels - 1);
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while(d < lend)
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{
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auto d_p = d;
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auto * const dpend = d_p + info->bmiHeader.biWidth;
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unsigned index = 0;
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while(d_p != dpend)
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{
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rgb_quad & rgb = info->bmiColors[(index & 1) ? (s[index >> 1] & 0xF) : (s[index >> 1] & 0xF0) >> 4];
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d_p->element.red = rgb.rgbRed;
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d_p->element.green = rgb.rgbGreen;
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d_p->element.blue = rgb.rgbBlue;
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d_p->element.alpha_channel = rgb.rgbReserved;
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++d_p;
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++index;
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}
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d = dpend;
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s -= bytes_per_line;
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}
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}
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}
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else if(2 == info->bmiHeader.biBitCount)
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{
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const auto * const lend = d + info->bmiHeader.biWidth * height_pixels;
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if(info->bmiHeader.biHeight < 0)
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{
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const unsigned char* s = bits;
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while(d < lend)
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{
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auto d_p = d;
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auto * const dpend = d_p + info->bmiHeader.biWidth;
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unsigned index = 0;
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while(d_p != dpend)
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{
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unsigned shift = (3 - (index & 0x3)) << 1; // (index % 4) * 2
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rgb_quad& rgb = info->bmiColors[(s[index >> 2] & (0x3 << shift))>>shift];
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d_p->element.red = rgb.rgbRed;
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d_p->element.green = rgb.rgbGreen;
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d_p->element.blue = rgb.rgbBlue;
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d_p->element.alpha_channel = rgb.rgbReserved;
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++d_p;
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++index;
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}
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d = dpend;
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s += bytes_per_line;
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}
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}
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else
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{
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const auto* s = bits + bytes_per_line * (height_pixels - 1);
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while(d < lend)
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{
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auto d_p = d;
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auto * const dpend = d_p + info->bmiHeader.biWidth;
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unsigned index = 0;
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while(d_p != dpend)
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{
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unsigned shift = (3 - (index & 0x3)) << 1; // (index % 4) * 2
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rgb_quad& rgb = info->bmiColors[(s[index >> 2] & (0x3 << shift))>>shift];
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d_p->element.red = rgb.rgbRed;
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d_p->element.green = rgb.rgbGreen;
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d_p->element.blue = rgb.rgbBlue;
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d_p->element.alpha_channel = rgb.rgbReserved;
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++d_p;
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++index;
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}
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d = dpend;
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s -= bytes_per_line;
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}
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}
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}
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else if(1 == info->bmiHeader.biBitCount)
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{
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const auto * const lend = d + info->bmiHeader.biWidth * height_pixels;
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if(info->bmiHeader.biHeight < 0)
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{
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const auto* s = bits;
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while(d < lend)
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{
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auto d_p = d;
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auto * const dpend = d_p + info->bmiHeader.biWidth;
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unsigned index = 0;
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while(d_p != dpend)
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{
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unsigned bi = (7 - (index & 7)); //(index % 8)
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rgb_quad & rgb = info->bmiColors[(s[index >> 3] & (1 << bi)) >> bi];
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d_p->element.red = rgb.rgbRed;
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d_p->element.green = rgb.rgbGreen;
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d_p->element.blue = rgb.rgbBlue;
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d_p->element.alpha_channel = rgb.rgbReserved;
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++d_p;
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++index;
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}
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d = dpend;
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s += bytes_per_line;
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}
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}
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else
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{
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const auto* s = bits + bytes_per_line * (height_pixels - 1);
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while(d < lend)
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{
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auto d_p = d;
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auto * const dpend = d_p + info->bmiHeader.biWidth;
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unsigned index = 0;
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while(d_p != dpend)
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{
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unsigned bi = (7 - (index & 7));
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rgb_quad & rgb = info->bmiColors[(s[index >> 3] & (1 << bi)) >> bi];
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d_p->element.red = rgb.rgbRed;
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d_p->element.green = rgb.rgbGreen;
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d_p->element.blue = rgb.rgbBlue;
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d_p->element.alpha_channel = rgb.rgbReserved;
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++d_p;
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++index;
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}
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d = dpend;
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s -= bytes_per_line;
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}
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}
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}
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}
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}
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}
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return (false == pixbuf_.empty());
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}
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bool alpha_channel() const override
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{
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return false;
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}
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bool empty() const override
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{
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return pixbuf_.empty();
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}
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void close() override
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{
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pixbuf_.close();
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}
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nana::size size() const override
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{
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return pixbuf_.size();
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}
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void paste(const nana::rectangle& src_r, graph_reference graph, const point& p_dst) const override
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{
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if(graph && pixbuf_)
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pixbuf_.paste(src_r, graph.handle(), p_dst);
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}
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void stretch(const nana::rectangle& src_r, graph_reference graph, const nana::rectangle& r) const override
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{
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if(graph && pixbuf_)
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pixbuf_.stretch(src_r, graph.handle(), r);
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}
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private:
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nana::paint::pixel_buffer pixbuf_;
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};//end class bmpfile
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}//end namespace detail
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}//end namespace paint
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}//end namespace nana
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#endif
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