add qr generator
This commit is contained in:
@@ -0,0 +1,355 @@
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// Fill out your copyright notice in the Description page of Project Settings.
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#include "QRCodeBlueprintFunctionLibrary.h"
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#include "qrencode.h"
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#include <string>
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#include <fstream>
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#include "IImageWrapper.h"
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//#include "ModuleManager.h"
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#include "ImageWrapper/Public/IImageWrapper.h"
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#include "IImageWrapperModule.h"
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//#include "FileManagerGeneric.h"
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#include "HAL/FileManagerGeneric.h"
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using namespace std;
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#define BI_RGB 0
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//#pragma pack(push, 2)必须要加。bfType是2个字节，对应“BM”，后4个字节是文件大小，又对应4字节。
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//如果不设定对齐方式，而按默认的8字节或4字节对应，这些属性就错位了，而别人又是按标准来读取的，
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//对齐方式不同，自然出错。一般情况下的编程之所以不考虑这些问题，是因为读取和保存都是你个人完成的，
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//对齐方式是一样的，自然不出错。而这里你生成的图片可能还要供别人使用，自然要严格遵守标准。
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#pragma pack(push, 2)//必须得写，否则sizeof得不到正确的结果
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typedef unsigned char BYTE;
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typedef unsigned short WORD;
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typedef unsigned long DWORD;
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typedef long LONG;
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typedef struct {
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WORD bfType;//位图文件的类型，必须为BM(1-2字节）
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DWORD bfSize;//位图文件的大小，以字节为单位（3-6字节，低位在前）
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WORD bfReserved1;//位图文件保留字，必须为0(7-8字节）
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WORD bfReserved2;//位图文件保留字，必须为0(9-10字节）
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DWORD bfOffBits;//位图数据的起始位置，以相对于位图（11-14字节，低位在前）
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} BITMAPFILEHEADER;
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typedef struct {
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DWORD biSize;//本结构所占用字节数（15-18字节）
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LONG biWidth;//位图的宽度，以像素为单位（19-22字节）
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LONG biHeight;//位图的高度，以像素为单位（23-26字节）
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WORD biPlanes;//目标设备的级别，必须为1(27-28字节）
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WORD biBitCount;//每个像素所需的位数，必须是1（双色）,4(16色），8(256色）16(高彩色)或24（真彩色）之一,（29-30字节）
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DWORD biCompression;//位图压缩类型，必须是0（不压缩），1(BI_RLE8压缩类型）或2(BI_RLE4压缩类型）之一,（31-34字节）
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DWORD biSizeImage;//位图的大小(其中包含了为了补齐行数是4的倍数而添加的空字节)，以字节为单位（35-38字节）
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LONG biXPelsPerMeter;//位图水平分辨率，每米像素数（39-42字节）
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LONG biYPelsPerMeter;//位图垂直分辨率，每米像素数（43-46字节)
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DWORD biClrUsed;//位图实际使用的颜色表中的颜色数（47-50字节）
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DWORD biClrImportant;//位图显示过程中重要的颜色数（51-54字节）
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} BITMAPINFOHEADER;
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#pragma pack(pop)
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void UQRCodeBlueprintFunctionLibrary::GenerateQRCodeBitmap(const int32& Width, const int32& Height, const FString& Name, const FString& Outfile, int32 Margin /* = 0 */)
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{
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std::string StdName(TCHAR_TO_UTF8(*Name));
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const char* QRCodeStr = StdName.c_str();
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QRcode* QRCodePtr = nullptr;
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QRCodePtr = QRcode_encodeString(QRCodeStr, 1, QR_ECLEVEL_L, QR_MODE_8, 1);
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if (QRCodePtr)
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{
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uint32 QRWidth, QRWidthAdjustedX, QRHeightAdjustedY, QRDataBytes;
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QRWidth = QRCodePtr->width;//矩阵的维数
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uint32 ScaleX = (Width - 2 * Margin) / QRWidth;
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uint32 ScaleY = (Height - 2 * Margin) / QRWidth;
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QRWidthAdjustedX = QRWidth * ScaleX;//水平维度占的像素个数（ScaleX）
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QRHeightAdjustedY = QRWidth * ScaleY;//垂直维度占的像素个数（ScaleY）
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QRDataBytes = QRWidthAdjustedX * QRHeightAdjustedY * 3;//每一个像素3个字节(BGR)
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//create data
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uint8* RGBDataPtr = (uint8 *)malloc(QRDataBytes);
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if (!RGBDataPtr)
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{
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printf("out of memory!!");
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return;
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}
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uint8* QRCodeSourceDatas = QRCodePtr->data;
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uint8* QRCodeDestData;
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memset(RGBDataPtr, 0xFF, QRDataBytes); //分配内存，并且填充为白色
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//由于Windows规定一个扫描行所占的字节数必须是4的倍数，这里必须是4的整数倍
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int32 WidthAdjusted = Width % 4 ? (Width / 4 + 1) * 4 : Width;
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uint32 ImageBytes = WidthAdjusted * Height * 3;
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//create bitmap file header
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BITMAPFILEHEADER FileHeader;
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FileHeader.bfType = 0x4D42; //"BM"
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FileHeader.bfReserved1 = 0;
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FileHeader.bfReserved2 = 0;
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FileHeader.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + ImageBytes;
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FileHeader.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
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//create bitmap info header
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BITMAPINFOHEADER InfoHeader = {0};//所有值默认为0
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InfoHeader.biSize = sizeof(BITMAPINFOHEADER);
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InfoHeader.biWidth = WidthAdjusted;
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//说明图象的高度，以象素为单位。注：这个值除了用于描述图像的高度之外，它还有另一个用处，
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//就是指明该图像是倒向的位图，还是正向的位图。如果该值是一个正数，说明图像是倒向的，
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//如果该值是一个负数，则说明图像是正向的。大多数的BMP文件都是倒向的位图，也就是时，
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//高度值是一个正数。（注：当高度值是一个负数时（正向图像），图像将不能被压缩
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//（也就是说biCompression成员将不能是BI_RLE8或BI_RLE4）。
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InfoHeader.biHeight = -(int32)Height;
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InfoHeader.biPlanes = 1;
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InfoHeader.biBitCount = 24;
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InfoHeader.biCompression = BI_RGB;
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InfoHeader.biSizeImage = ImageBytes;
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for (uint32 y = 0; y < QRWidth; y++)
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{
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QRCodeDestData = RGBDataPtr + ScaleY * y * QRWidthAdjustedX * 3;
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for (uint32 x = 0; x < QRWidth; x++)
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{
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if (*QRCodeSourceDatas & 0x01)
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{
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for (uint32 rectY = 0; rectY < ScaleY; rectY++)
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{
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for (uint32 rectX = 0; rectX < ScaleX; rectX++)
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{
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*(QRCodeDestData + rectY * QRWidthAdjustedX * 3 + rectX * 3) = 0;//Blue
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*(QRCodeDestData + rectY * QRWidthAdjustedX * 3 + rectX * 3 + 1) = 0;//Green
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*(QRCodeDestData + rectY * QRWidthAdjustedX * 3 + rectX * 3 + 2) = 0;//Red
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}
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}
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}
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QRCodeDestData += ScaleX * 3;
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QRCodeSourceDatas += 1;
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}
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}
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uint8* ImageDataPtr = (uint8 *)malloc(ImageBytes);
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memset(ImageDataPtr, 0xFF, ImageBytes); //分配内存，并且填充为白色
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for (uint32 y = Margin; y < QRHeightAdjustedY + Margin; y++)
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{
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for (uint32 x = Margin; x < QRWidthAdjustedX + Margin; x++)
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{
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for (int32 PixelByte = 0; PixelByte < 3; PixelByte++)
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{
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uint32 ImageIndex = (y * WidthAdjusted + x) * 3 + PixelByte;
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uint32 RGBDataIndex = ((y - Margin) * QRWidthAdjustedX + (x - Margin)) * 3 + PixelByte;
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ImageDataPtr[ImageIndex] = RGBDataPtr[RGBDataIndex];
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}
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}
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}
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if (!FFileManagerGeneric::Get().DirectoryExists(*Outfile))
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{
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FFileManagerGeneric::Get().MakeDirectory(*FPaths::GetPath(Outfile), true);
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}
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FILE* BitmapFile;
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if (!(fopen_s(&BitmapFile, TCHAR_TO_UTF8(*Outfile), "wb")))
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{
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fwrite(&FileHeader, sizeof(BITMAPFILEHEADER), 1, BitmapFile);
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fwrite(&InfoHeader, sizeof(BITMAPINFOHEADER), 1, BitmapFile);
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fwrite(ImageDataPtr, sizeof(uint8), ImageBytes, BitmapFile);
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fclose(BitmapFile);
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}
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else
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{
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printf("create file failed!!");
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}
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QRcode_free(QRCodePtr);
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free(RGBDataPtr);
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if (Margin > 0)
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{
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free(ImageDataPtr);
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}
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}
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}
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UTexture2D* UQRCodeBlueprintFunctionLibrary::GenerateQRCodeTexture(const int32& Width, const int32& Height, const FString& Name, int32 Margin /* = 0 */)
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{
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std::string StdName(TCHAR_TO_UTF8(*Name));
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const char* QRCodeStr = StdName.c_str();
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QRcode* QRCodePtr = nullptr;
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QRCodePtr = QRcode_encodeString(QRCodeStr, 1, QR_ECLEVEL_L, QR_MODE_8, 1);
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UTexture2D* Texture = nullptr;
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if (QRCodePtr)
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{
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uint32 QRWidth, QRWidthAdjustedX, QRHeightAdjustedY, QRDataBytes;
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QRWidth = QRCodePtr->width;//矩阵的维数
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uint32 ScaleX = (Width - 2 * Margin) / QRWidth;
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uint32 ScaleY = (Height - 2 * Margin) / QRWidth;
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QRWidthAdjustedX = QRWidth * ScaleX;//水平维度占的像素个数（ScaleX）
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QRHeightAdjustedY = QRWidth * ScaleY;//垂直维度占的像素个数（ScaleY）
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QRDataBytes = QRWidthAdjustedX * QRHeightAdjustedY * 3;//每一个像素3个字节(BGR)
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uint8* RGBDataPtr = (uint8 *)malloc(QRDataBytes);
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if (!RGBDataPtr)
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{
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printf("out of memory!!");
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return Texture;
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}
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uint8* QRCodeSourceDatas = QRCodePtr->data;
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uint8* QRCodeDestData;
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memset(RGBDataPtr, 0xFF, QRDataBytes); //分配内存，并且填充为白色
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for (uint32 y = 0; y < QRWidth; y++)
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{
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QRCodeDestData = RGBDataPtr + ScaleY * y * QRWidthAdjustedX * 3;
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for (uint32 x = 0; x < QRWidth; x++)
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{
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if (*QRCodeSourceDatas & 0x01)
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{
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for (uint32 rectY = 0; rectY < ScaleY; rectY++)
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{
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for (uint32 rectX = 0; rectX < ScaleX; rectX++)
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{
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*(QRCodeDestData + rectY * QRWidthAdjustedX * 3 + rectX * 3) = 0;//Blue
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*(QRCodeDestData + rectY * QRWidthAdjustedX * 3 + rectX * 3 + 1) = 0;//Green
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*(QRCodeDestData + rectY * QRWidthAdjustedX * 3 + rectX * 3 + 2) = 0;//Red
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}
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}
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}
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QRCodeDestData += ScaleX * 3;
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QRCodeSourceDatas += 1;
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}
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}
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QRcode_free(QRCodePtr);
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TArray<uint8> ImageBGRAData;
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//for (uint32 i = 0; i < QRDataBytes; i++)
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//{
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// ImageBGRAData.Add(RGBDataPtr[i]);
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// if ((i + 1) % 3 == 0)
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// {
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// ImageBGRAData.Add(0xFF);//填充Alpha通道为不透明
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// }
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//}
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for (uint32 i = 0; i < (uint32)Width * (uint32)Height * 4; i++)
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{
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ImageBGRAData.Add(0xFF);
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}
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for (uint32 y = Margin; y < QRHeightAdjustedY + Margin; y++)
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{
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for (uint32 x = Margin; x < QRWidthAdjustedX + Margin; x++)
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{
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for (int32 PixelByte = 0; PixelByte < 3; PixelByte++)
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{
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uint32 ImageIndex = ( y * Width + x ) * 4 + PixelByte;
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uint32 RGBDataIndex = ((y - Margin) * QRWidthAdjustedX + (x - Margin)) * 3 + PixelByte;
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ImageBGRAData[ImageIndex] = RGBDataPtr[RGBDataIndex];
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}
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}
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}
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free(RGBDataPtr);
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IImageWrapperModule& ImageWrapperModule = FModuleManager::LoadModuleChecked<IImageWrapperModule>(FName("ImageWrapper"));
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TSharedPtr<IImageWrapper> TargetImageWrapper = ImageWrapperModule.CreateImageWrapper(EImageFormat::BMP);
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if (TargetImageWrapper.IsValid())
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{
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Texture = UTexture2D::CreateTransient(Width, Height, PF_B8G8R8A8);
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if (Texture != nullptr)
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{
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FTexture2DMipMap& Mip = Texture->PlatformData->Mips[0];
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void* TextureData = Mip.BulkData.Lock(LOCK_READ_WRITE);
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FMemory::Memcpy(TextureData, ImageBGRAData.GetData(), ImageBGRAData.Num());
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Mip.BulkData.Unlock();
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Texture->UpdateResource();
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}
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}
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}
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return Texture;
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}
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bool UQRCodeBlueprintFunctionLibrary::GenerateQRCodeImageByType(const int32& Width, const int32& Height, const FString& Name, const FString& Outfile, QR_IMAGE_FORMAT ImageFormat, int32 Margin /*= 0*/)
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{
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std::string StdName(TCHAR_TO_UTF8(*Name));
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const char* QRCodeStr = StdName.c_str();
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QRcode* QRCodePtr = nullptr;
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QRCodePtr = QRcode_encodeString(QRCodeStr, 1, QR_ECLEVEL_L, QR_MODE_8, 1);
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UTexture2D* Texture = nullptr;
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if (QRCodePtr)
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{
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uint32 QRWidth, QRWidthAdjustedX, QRHeightAdjustedY, QRDataBytes;
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QRWidth = QRCodePtr->width;//矩阵的维数
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uint32 ScaleX = (Width - 2 * Margin) / QRWidth;
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uint32 ScaleY = (Height - 2 * Margin) / QRWidth;
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QRWidthAdjustedX = QRWidth * ScaleX;//水平维度占的像素个数（ScaleX）
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QRHeightAdjustedY = QRWidth * ScaleY;//垂直维度占的像素个数（ScaleY）
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QRDataBytes = QRWidthAdjustedX * QRHeightAdjustedY * 3;//每一个像素3个字节(BGR)
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uint8* RGBDataPtr = (uint8 *)malloc(QRDataBytes);
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if (!RGBDataPtr)
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{
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printf("out of memory!!");
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return false;
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}
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uint8* QRCodeSourceDatas = QRCodePtr->data;
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uint8* QRCodeDestData;
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memset(RGBDataPtr, 0xFF, QRDataBytes); //分配内存，并且填充为白色
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for (uint32 y = 0; y < QRWidth; y++)
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{
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QRCodeDestData = RGBDataPtr + ScaleY * y * QRWidthAdjustedX * 3;
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for (uint32 x = 0; x < QRWidth; x++)
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{
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if (*QRCodeSourceDatas & 0x01)
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{
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for (uint32 rectY = 0; rectY < ScaleY; rectY++)
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{
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for (uint32 rectX = 0; rectX < ScaleX; rectX++)
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{
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*(QRCodeDestData + rectY * QRWidthAdjustedX * 3 + rectX * 3) = 0;//Blue
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*(QRCodeDestData + rectY * QRWidthAdjustedX * 3 + rectX * 3 + 1) = 0;//Green
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*(QRCodeDestData + rectY * QRWidthAdjustedX * 3 + rectX * 3 + 2) = 0;//Red
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}
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}
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}
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QRCodeDestData += ScaleX * 3;
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QRCodeSourceDatas += 1;
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}
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}
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QRcode_free(QRCodePtr);
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TArray<uint8> ImageBGRAData;
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for (uint32 i = 0; i < (uint32)Width * (uint32)Height * 4; i++)
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{
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ImageBGRAData.Add(0xFF);
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}
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for (uint32 y = Margin; y < QRHeightAdjustedY + Margin; y++)
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{
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for (uint32 x = Margin; x < QRWidthAdjustedX + Margin; x++)
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{
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for (int32 PixelByte = 0; PixelByte < 3; PixelByte++)
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{
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uint32 ImageIndex = (y * Width + x) * 4 + PixelByte;
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uint32 RGBDataIndex = ((y - Margin) * QRWidthAdjustedX + (x - Margin)) * 3 + PixelByte;
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ImageBGRAData[ImageIndex] = RGBDataPtr[RGBDataIndex];
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}
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}
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}
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free(RGBDataPtr);
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IImageWrapperModule& ImageWrapperModule = FModuleManager::LoadModuleChecked<IImageWrapperModule>(FName("ImageWrapper"));
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TSharedPtr<IImageWrapper> TargetImageWrapper = ImageWrapperModule.CreateImageWrapper(EImageFormat(ImageFormat));
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if (TargetImageWrapper.IsValid())
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{
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if (TargetImageWrapper->SetRaw(ImageBGRAData.GetData(), ImageBGRAData.Num(), Width, Height, ERGBFormat::BGRA, 8))
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{
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const TArray<uint8, FDefaultAllocator64> TagetImageData = TargetImageWrapper->GetCompressed();
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if (!FFileManagerGeneric::Get().DirectoryExists(*Outfile))
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{
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FFileManagerGeneric::Get().MakeDirectory(*FPaths::GetPath(Outfile), true);
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}
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return FFileHelper::SaveArrayToFile(TagetImageData, *Outfile);
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}
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}
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}
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return false;
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}
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