package?com.lanhetech.core.qrcode.utils;

import?android.graphics.Bitmap;

/**
?*?保存為單色位圖，即使黑白位圖
?*/
public?class?BmpUtil?{


????/**
?????*?保存為單色bmp格式的完整字節數
?????**/
????public?static?byte[]?changeToMonochromeBitmap（Bitmap?bmp）?{
????????int[]?binarys?=?gray2Binary（bmp）;
????????byte[]?data?=?compressMonoBitmap（bmp?binarys）;
????????byte[]?header?=?addBMPImageHeader（data.length?+?62）;
????????byte[]?infos?=?addBMPImageInfosHeader（bmp.getWidth（）?bmp.getHeight（））;
????????byte[]?buffer?=?new?byte[62?+?data.length];
????????System.arraycopy（header?0?buffer?0?header.length）;
????????System.arraycopy（infos?0?buffer?14?infos.length）;
????????System.arraycopy（data?0?buffer?62?data.length）;
????????return?buffer;
????}

????/**
?????*?保存為單色bmp數據，不包含頭，正向頭
?????**/
????public?static?byte[]?changeSingleBytes（Bitmap?bmp）?{
????????int[]?binarys?=?gray2Binary（bmp）;
????????byte[]?data?=?compressMonoBitmap_ps（bmp?binarys）;
????????return?data;
????}

????/**
?????*?將彩色圖轉換為灰階圖，并二值化處理
?????*
?????*?@param?bmp?位圖
?????*?@return?返回灰階圖二值化后的顏色int[]
?????*/
????private?static?int[]?gray2Binary（Bitmap?bmp）?{
????????int?width?=?bmp.getWidth（）;???//?獲取位圖的寬
????????int?height?=?bmp.getHeight（）;?//?獲取位圖的高
????????int[]?pixels?=?new?int[width?*?height];??//?通過位圖的大小創建像素點數組
????????bmp.getPixels（pixels?0?width?0?0?width?height）;???//?int?0?代表0XFFFFFFFF即是1.0完全不透明，0.0f完全透明。黑色完全透明。
????????for?（int?i?=?0;?i?????????????for?（int?j?=?0;?j?????????????????int?grey?=?pixels[width?*?i?+?j];??//?第幾行，第幾個
????????????????//?分離三原色
????????????????int?alpha?=?（（grey?&?0xFF000000）?>>?24）;?//?透明度
????????????????int?red?=?（（grey?&?0x00FF0000）?>>?16）;???//?紅色
????????????????int?green?=?（（grey?&?0x0000FF00）?>>?8）;??//?綠色
????????????????int?blue?=?（grey?&?0x000000FF）;??????????//?藍色
????????????????if?（alpha?==?0）?{??//?透明度為0，則說明沒有顏色，那變更為白色
????????????????????pixels[width?*?i?+?j]?=?0;???????????//?白色是0
????????????????????continue;
????????????????}
????????????????grey?=?（int）?（red?*?0.3?+?green?*?0.59?+?blue?*?0.11）;??//?轉化為灰度圖??灰度值：255為白色，0為黑色
????????????????//?TODO:?2016/12/27?灰度值為200，可調整該參數
????????????????grey?=?grey?????????????????pixels[width?*?i?+?j]?=?grey;
????????????}
????????}
????????return?pixels;
????}


????/**
?????*?壓縮為完整單色bmp數組，并反向
?????*
?????*?@param?bmp?????壓縮需要用到位圖的寬度，高度。
?????*?@param?binarys?二值化數據
?????*?@return
?????*/
????private?static?byte[]?compressMonoBitmap（Bitmap?bmp?int[]?binarys）?{
????????int?width?=?bmp.getWidth（）;???//?獲取位圖的寬
????????int?height?=?bmp.getHeight（）;?//?獲取位圖的高
????????//?行補位的公式為?widthBytes?=?（width*biBitCount+31）/32*4
????????//?需要轉化為單色，所以biBitCount=1；
????????//?確定一行幾個字節
????????int?widthBytes?=?（width?+?31）?/?32?*?4;

????????byte[]?newss?=?new?byte[widthBytes?*?height];
????????for?（int?i?=?height;?i?>?0;?i--）?{
????????????for?（int?j?