LPC54608生成PDF文件
来源：互联网 发布：现金返利系统源码 编辑：程序博客网 时间：2024/06/08 02:49
主机环境：Win10 64bit
开发环境：MDK5.23
目标板：LPC54608
之前在NXP论坛里得到了一块LPC54608开发板，最吸引人的地方是带了一块屏，如下图：
这也是第一次接触NXP的开发板,之前一直都是用的ST的MCU，NXP的库跟ST的还是差别蛮大的，自我感觉ST的开发入手要快一些，而NXP的相对慢一些，入手开发板之后就看了库里面自带的一些基本驱动例程，只熟悉了一下基本外设的开发，之前有次在群里看到有人询问单片机生成PDF的问题，突然觉得有些兴趣所以就有了前面的libHaru学习笔记,libHaru库是一个十分不错的库，对于PDF的实现来说也是相当齐全的，在PC上使用是完全没有问题的，但在资源紧张的MCU上，还是有些困难的，因此就想找一下适用于MCU的生成PDF的库，结果不太理想，都是一些需要实现动态内存管理的平台才行，而且这些库都是把生成的数据放在了内存中，直到保存文件时才写入到文件中，这对于一般只有几十或者几百KB级别的单片机来说更不可能了，于是乎，萌发了自己动手写一个基本的能用于MCU的生成PDF文件的库，我称之为libpdf，其中的接口参考了libHaru，如下所示：
当然有些接口还没有实现，但基本的操作还是可以的，等以后再逐渐完善吧，pdflib是生成pdf文件的，因此要基于Fatfs来实现文件的操作，pdflib库只有两个文件，也相应的参考了pdfgen库，该库在后面有链接，
头文件如下：
#ifndef __PDFLIB_H__#define __PDFLIB_H__#include "ff.h"/*----- standard C library functions -----------------------------------------*/#define LPDF_FOPEN f_open#define LPDF_FCLOSE f_close#define LPDF_FREAD f_read#define LPDF_FWRITE f_write#define LPDF_FFLUSH f_sync#define LPDF_FSEEK f_seek#define LPDF_FTELL f_tell#define LPDF_FEOF f_eof#define LPDF_FERROR f_error#define LPDF_RENAME f_rename#define LPDF_REMOVE f_unlink#define LPDF_MALLOC malloc#define LPDF_FREE free#define LPDF_FILE FIL#define LPDF_TIME time#define LPDF_PRINTF printf#define LPDF_SPRINTF sprintf#define LPDF_FPRINTF f_printf#define LPDF_VOID void#define LPDF_SIN sin#define LPDF_COS cos/* native OS integer types */typedef signed int LPDF_INT;typedef unsigned int LPDF_UINT;/* 32bit integer types */typedef signed int LPDF_INT32;typedef unsigned int LPDF_UINT32;/* 16bit integer types */typedef signed short LPDF_INT16;typedef unsigned short LPDF_UINT16;/* 8bit integer types */typedef signed char LPDF_INT8;typedef unsigned char LPDF_UINT8;/* 8bit binary types */typedef unsigned char LPDF_BYTE;/* float type (32bit IEEE754) */typedef float LPDF_REAL;/* double type (64bit IEEE754) */typedef double LPDF_DOUBLE;/* boolean type (0: False, !0: True) */typedef signed int LPDF_BOOL;/* error-no type (32bit unsigned integer) */typedef unsigned long LPDF_STATUS;#define LPDF_OK 0#define LPDF_FAILED 1/*----- font state -----------------------------------------------------------*/#define LPDF_FONT_INVALID 0x00FF#define LPDF_FONT_COURIER 0x0000#define LPDF_FONT_COURIER_B 0x0001#define LPDF_FONT_COURIER_O 0x0002#define LPDF_FONT_COURIER_OB 0x0003#define LPDF_FONT_HELVETICA 0x0004#define LPDF_FONT_HELVETICA_B 0x0005#define LPDF_FONT_HELVETICA_O 0x0006#define LPDF_FONT_HELVETICA_BO 0x0007#define LPDF_FONT_TIMES_R 0x0008#define LPDF_FONT_TIMES_B 0x0009#define LPDF_FONT_TIMES_I 0x000A#define LPDF_FONT_TIMES_BI 0x000B#define LPDF_FONT_SYMBOL 0x000C#define LPDF_FONT_ZAP 0x000D/*----- Graphis mode ---------------------------------------------------------*/#define LPDF_GMODE_PAGE_DESCRIPTION 0x0001#define LPDF_GMODE_PATH_OBJECT 0x0002#define LPDF_GMODE_TEXT_OBJECT 0x0004#define LPDF_GMODE_CLIPPING_PATH 0x0008#define LPDF_GMODE_SHADING 0x0010#define LPDF_GMODE_INLINE_IMAGE 0x0020#define LPDF_GMODE_EXTERNAL_OBJECT 0x0040#define LPDF_GMODE_INVALID 0x0080#define LPDF_GMODE_OVER 0x0100#define OBJ_MAX_NUM 256/* Page的结构信息是否需要树形结构 */typedef enum { OBJ_info, OBJ_stream, OBJ_font, OBJ_page, OBJ_catalog, OBJ_pages, OBJ_image,}LPDF_ObjType;typedef struct{ LPDF_ObjType objType; LPDF_UINT16 objIdx; LPDF_UINT16 height; LPDF_UINT16 width; LPDF_UINT16 length; LPDF_UINT gMode; LPDF_BYTE fontType; LPDF_BYTE fontSize; LPDF_BYTE pState; LPDF_VOID *doc;}LPDF_Obj;typedef struct{ LPDF_Obj obj[OBJ_MAX_NUM]; LPDF_UINT32 offset; LPDF_UINT16 objNumber; LPDF_FILE file;}LPDF_Doc_Rec;typedef LPDF_Doc_Rec *LPDF_Doc;typedef LPDF_Obj *LPDF_Page;typedef LPDF_Obj *LPDF_Image;extern const char *font_list[];/*----- LPDF Interfaces-------------------------------------------------------*/const char * LPDF_GetVersion(void);LPDF_Doc LPDF_New(void);LPDF_Page LPDF_AddPage(LPDF_Doc pdf);LPDF_STATUS LPDF_SaveToFile(LPDF_Doc pdf,const char *file_name);LPDF_STATUS LPDF_Free(LPDF_Doc pdf);LPDF_STATUS LPDF_Page_CheckState(LPDF_Page page, LPDF_UINT mode);LPDF_STATUS LPDF_Page_SetFontAndSize(LPDF_Page page, const char *font_name, LPDF_UINT8 size);LPDF_STATUS LPDF_Page_SaveParams(LPDF_Page page);LPDF_STATUS LPDF_Page_SaveContext(LPDF_Page page);LPDF_STATUS LPDF_Page_BeginText(LPDF_Page page);LPDF_STATUS LPDF_Page_EndText(LPDF_Page page);LPDF_UINT16 LPDF_Page_GetHeight(LPDF_Page page);LPDF_UINT16 LPDF_Page_GetWidth(LPDF_Page page);LPDF_STATUS LPDF_Page_SetHeight(LPDF_Page page, LPDF_UINT16 value);LPDF_STATUS LPDF_Page_SetWidth(LPDF_Page page, LPDF_UINT16 value);LPDF_STATUS LPDF_Page_ShowText(LPDF_Page page, const char *text);LPDF_STATUS LPDF_Page_MoveTextPos(LPDF_Page page, LPDF_INT x, LPDF_INT y);LPDF_STATUS LPDF_Page_TextOut(LPDF_Page page, LPDF_UINT16 x, LPDF_UINT16 y, const char *text);LPDF_STATUS LPDF_Page_SetRGBStroke(LPDF_Page page, LPDF_REAL r, LPDF_REAL g, LPDF_REAL b);LPDF_STATUS LPDF_Page_SetRGBFill(LPDF_Page page, LPDF_REAL r, LPDF_REAL g, LPDF_REAL b);LPDF_STATUS LPDF_Page_MoveTo (LPDF_Page page, LPDF_UINT16 x, LPDF_UINT16 y);LPDF_STATUS LPDF_Page_LineTo (LPDF_Page page, LPDF_UINT16 x, LPDF_UINT16 y);LPDF_STATUS LPDF_Page_Stroke(LPDF_Page page);LPDF_STATUS LPDF_Page_ClosePathStroke(LPDF_Page page);LPDF_STATUS LPDF_Page_DrawImage(LPDF_Page page, LPDF_Image image, LPDF_UINT16 x, LPDF_UINT16 y, LPDF_UINT16 width, LPDF_UINT16 height);#endif源文件如下：#include <stdio.h>#include <stdlib.h>#include <stdint.h>#include <string.h>#include "pdflib.h"#define LPDF_INVALID_OBJECT 0x1033static char pdf_buf[512];#define LPDF_VERSIOIN_TEXT "0.0.1"#define LPDF_FILE_HEADER_LEN 15#define LPDF_BASEFONT_NUM 14const char LPDF_FILE_HEADER[] = "%%PDF-1.4\n%%\xAA\xBB\xCC\xDD\n";const char *font_list[] = { "Courier", "Courier-Bold", "Courier-Oblique", "Courier-BoldOblique", "Helvetica", "Helvetica-Bold", "Helvetica-Oblique", "Helvetica-BoldOblique", "Times-Roman", "Times-Bold", "Times-Italic", "Times-BoldItalic", "Symbol", "ZapfDingbats", NULL};const char * LPDF_GetVersion(void){ return LPDF_VERSIOIN_TEXT;}LPDF_Doc LPDF_New(void){ static LPDF_Doc_Rec pdf; LPDF_INT length = 0, i = 0;LPDF_UINT writeBytes = 0;FRESULT fr; fr = LPDF_FOPEN(&pdf.file,"/tmp.pdf",FA_CREATE_ALWAYS|FA_WRITE);if(fr){LPDF_PRINTF("create tmp.pdf failed!\r\n");return NULL;} LPDF_FPRINTF(&pdf.file,LPDF_FILE_HEADER); /* 写入文件头 */ pdf.offset = LPDF_FILE_HEADER_LEN; pdf.obj[0].objIdx = pdf.offset; length = LPDF_SPRINTF(pdf_buf,"1 0 obj\n<<\n/Type /Catalog\n/Pages 17 0 R\n>>\nendobj\n\n"); LPDF_FWRITE(&pdf.file,pdf_buf,length,&writeBytes); pdf.offset += length; pdf.obj[1].objIdx = pdf.offset; length = LPDF_SPRINTF(pdf_buf,"2 0 obj\n<<\n/Creator (light pdf library 0.0.1)\n" "/Auther (anobodykey)\n>>\nendobj\n\n"); LPDF_FWRITE(&pdf.file,pdf_buf,length,&writeBytes); pdf.offset += length; for(i = 0; i < LPDF_BASEFONT_NUM-2; i++) { pdf.obj[2+i].objIdx = pdf.offset; length = LPDF_SPRINTF(pdf_buf,"%d 0 obj\n<<\n/Type /Font\n/Subtype /Type1\n" "/BaseFont /%s\n/Encoding /WinAnsiEncoding\n>>\n" "endobj\n\n",3+i,font_list[i]); LPDF_FWRITE(&pdf.file,pdf_buf,length,&writeBytes); pdf.offset += length; } for(; i < LPDF_BASEFONT_NUM; i++) { pdf.obj[2+i].objIdx = pdf.offset; length = LPDF_SPRINTF(pdf_buf,"%d 0 obj\n<<\n/Type /Font\n/Subtype /Type1\n" "/BaseFont /%s\n>>\nendobj\n\n",3+i,font_list[i]); LPDF_FWRITE(&pdf.file,pdf_buf,length,&writeBytes); pdf.offset += length; } pdf.objNumber = 3+i; return (LPDF_Doc)&pdf;}LPDF_STATUS LPDF_SaveToFile(LPDF_Doc pdf,const char *file_name){ LPDF_UINT16 i = 0, child_pages = 0; LPDF_INT length = 0;LPDF_UINT writeBytes = 0; pdf->obj[16].objIdx = pdf->offset; child_pages = (pdf->objNumber-2-LPDF_BASEFONT_NUM)/3 ; length = LPDF_SPRINTF(pdf_buf,"17 0 obj\n<<\n/Types /Pages\n/Count %d\n/Kids [ ",child_pages); LPDF_FWRITE(&pdf->file,pdf_buf,length,&writeBytes); pdf->offset += length; for(i = 0; i < child_pages; i++) { length = LPDF_SPRINTF(pdf_buf,"%d 0 R\n",18+i*3); LPDF_FWRITE(&pdf->file,pdf_buf,length,&writeBytes); pdf->offset += length; } length = LPDF_SPRINTF(pdf_buf,"]\n>>\nendobj\n\n"); LPDF_FWRITE(&pdf->file,pdf_buf,length,&writeBytes); pdf->offset += length; LPDF_FPRINTF(&pdf->file,"xref\n0 %d\n0000000000 65535 f\r\n",pdf->objNumber+1); for(i = 0 ; i < pdf->objNumber; i++) { LPDF_FPRINTF(&pdf->file,"%10.10d 00000 n\r\n",pdf->obj[i].objIdx); } LPDF_FPRINTF(&pdf->file,"trailer\n<<\n/Size %d\n/Root 1 0 R\n/Info 2 0 R\n>>\nstartxref\n%d\n%%%%EOF", pdf->objNumber+1,pdf->offset); LPDF_FCLOSE(&pdf->file); LPDF_REMOVE(file_name); LPDF_RENAME("tmp.pdf",file_name); return LPDF_OK;}LPDF_STATUS LPDF_Free(LPDF_Doc pdf){ memset(pdf,sizeof(LPDF_Doc_Rec),0); return LPDF_OK;}LPDF_Page LPDF_AddPage(LPDF_Doc pdf){ LPDF_INT length = 0,i = 0; LPDF_Page page = NULL;LPDF_UINT writeBytes = 0; pdf->obj[pdf->objNumber].objIdx = pdf->offset; length = LPDF_SPRINTF(pdf_buf,"%d 0 obj\n<<\n/Type /Page\n/Parent 4 0 R\n/Contents %d 0 R\n" "/Resources <<\n/ProcSet [/PDF /TEXT /ImageB /ImageC /ImageI]\n" "/Font <<\n",pdf->objNumber+1,pdf->objNumber+2); LPDF_FWRITE(&pdf->file,pdf_buf,length,&writeBytes); pdf->offset += length; while(font_list[i]) { length = LPDF_SPRINTF(pdf_buf,"/F%d %d 0 R\n",i+1,3+i); LPDF_FWRITE(&pdf->file,pdf_buf,length,&writeBytes); pdf->offset += length; i+=1; } LPDF_FPRINTF(&pdf->file,">>\n>>\n"); pdf->offset += 4; page = (LPDF_Page)&pdf->obj[pdf->objNumber]; page->width = 595; page->height = 842; page->gMode = LPDF_GMODE_INVALID; page->fontType = LPDF_FONT_INVALID; page->doc = pdf; return page;}LPDF_STATUS LPDF_Page_SetHeight(LPDF_Page page, LPDF_UINT16 value){ page->height = value; return LPDF_OK;}LPDF_STATUS LPDF_Page_SetWidth(LPDF_Page page, LPDF_UINT16 value){ page->width = value; return LPDF_OK;}LPDF_UINT16 LPDF_Page_GetHeight(LPDF_Page page){ if(page) { return page->height; } return LPDF_OK;}LPDF_UINT16 LPDF_Page_GetWidth(LPDF_Page page){ if(page) { return page->width; } return LPDF_OK;}LPDF_STATUS LPDF_Page_CheckState(LPDF_Page page, LPDF_UINT mode){ if(!page) return LPDF_INVALID_OBJECT; if(!(page->gMode&mode)) return LPDF_FAILED; return LPDF_OK;}LPDF_STATUS LPDF_Page_SetFontAndSize(LPDF_Page page, const char *font_name, LPDF_UINT8 size){ LPDF_Doc pdf = (LPDF_Doc)page->doc; LPDF_INT i = 0,length = 0;LPDF_UINT writeBytes = 0; LPDF_STATUS ret = LPDF_Page_CheckState(page,LPDF_GMODE_TEXT_OBJECT|LPDF_GMODE_PAGE_DESCRIPTION); if(LPDF_OK != ret) return ret; while(font_list[i]) { if(0 == strcmp(font_list[i],font_name)) { page->fontType = i; page->fontSize = size; length = LPDF_SPRINTF(pdf_buf,"/F%d %d Tf\n",i+1,size); LPDF_FWRITE(&pdf->file,pdf_buf,length,&writeBytes); pdf->offset += length; page->length += length; return LPDF_OK; } i+=1; } return LPDF_OK;}LPDF_STATUS LPDF_Page_SaveParams(LPDF_Page page){ LPDF_INT length;LPDF_UINT writeBytes = 0; LPDF_Doc pdf = (LPDF_Doc)page->doc; LPDF_STATUS ret = LPDF_Page_CheckState(page,LPDF_GMODE_INVALID); if(LPDF_OK != ret) return ret; /* 对于每个page来说该接口只能调用一次即在GMODE为INVALID的模式下 */ length = LPDF_SPRINTF(pdf_buf,"/MediaBox [ 0 0 %d %d ]\n>>\nendobj\n\n", page->width, page->height); LPDF_FWRITE(&pdf->file,pdf_buf,length,&writeBytes); pdf->offset += length; pdf->obj[pdf->objNumber+1].objIdx = pdf->offset; length = LPDF_SPRINTF(pdf_buf,"%d 0 obj\n<</Length %d 0 R>>\nstream\n", pdf->objNumber+2, pdf->objNumber+3); LPDF_FWRITE(&pdf->file,pdf_buf,length,&writeBytes); pdf->offset += length; page->length = 0; page->gMode = LPDF_GMODE_PAGE_DESCRIPTION; return LPDF_OK;}LPDF_STATUS LPDF_Page_SaveContext(LPDF_Page page){ LPDF_INT length;LPDF_UINT writeBytes = 0; LPDF_Doc pdf = (LPDF_Doc)page->doc; LPDF_STATUS ret = LPDF_Page_CheckState(page,LPDF_GMODE_PAGE_DESCRIPTION); if(LPDF_OK != ret) return ret; /* 对于每个page来说该接口只能调用一次即在GMODE为PAGE_DESCRIPTION的模式下 */ length = LPDF_SPRINTF(pdf_buf,"endstream\nendobj\n\n"); LPDF_FWRITE(&pdf->file,pdf_buf,length,&writeBytes); pdf->offset += length; pdf->obj[pdf->objNumber+2].objIdx = pdf->offset; length = LPDF_SPRINTF(pdf_buf,"%d 0 obj\n%d\nendobj\n\n", pdf->objNumber+3,page->length); LPDF_FWRITE(&pdf->file,pdf_buf,length,&writeBytes); pdf->offset += length; pdf->objNumber += 3; page->gMode = LPDF_GMODE_OVER; return LPDF_OK;}LPDF_STATUS LPDF_Page_BeginText(LPDF_Page page){ LPDF_Doc pdf = (LPDF_Doc)page->doc; LPDF_STATUS ret = LPDF_Page_CheckState(page,LPDF_GMODE_PAGE_DESCRIPTION); if(LPDF_OK != ret) return ret; LPDF_FPRINTF(&pdf->file,"BT\n"); pdf->offset += 3; page->length += 3; page->gMode = LPDF_GMODE_TEXT_OBJECT; return LPDF_OK;}LPDF_STATUS LPDF_Page_EndText(LPDF_Page page){ LPDF_Doc pdf = (LPDF_Doc)page->doc; LPDF_STATUS ret = LPDF_Page_CheckState(page,LPDF_GMODE_TEXT_OBJECT); if(LPDF_OK != ret) return ret; LPDF_FPRINTF(&pdf->file,"ET\n"); pdf->offset += 3; page->length += 3; page->gMode = LPDF_GMODE_PAGE_DESCRIPTION; return LPDF_OK;}LPDF_STATUS LPDF_Page_ShowText(LPDF_Page page, const char *text){ LPDF_INT length = 0;LPDF_UINT writeBytes = 0; LPDF_Doc pdf = (LPDF_Doc)page->doc; LPDF_STATUS ret = LPDF_Page_CheckState(page,LPDF_GMODE_TEXT_OBJECT); if(LPDF_OK != ret) return ret; if(LPDF_FONT_INVALID == page->fontType) return LPDF_OK; length = LPDF_SPRINTF(pdf_buf,"(%s) Tj\n",text); LPDF_FWRITE(&pdf->file,pdf_buf,length,&writeBytes); pdf->offset += length; page->length += length; return LPDF_OK; }LPDF_STATUS LPDF_Page_MoveTextPos(LPDF_Page page, LPDF_INT x, LPDF_INT y){ LPDF_INT length = 0;LPDF_UINT writeBytes = 0; LPDF_Doc pdf = (LPDF_Doc)page->doc; LPDF_STATUS ret = LPDF_Page_CheckState(page,LPDF_GMODE_TEXT_OBJECT); if(LPDF_OK != ret) return ret; length = LPDF_SPRINTF(pdf_buf,"%d %d Td\n",x,y); LPDF_FWRITE(&pdf->file,pdf_buf,length,&writeBytes); pdf->offset += length; page->length += length; return LPDF_OK;}LPDF_STATUS LPDF_Page_TextOut(LPDF_Page page, LPDF_UINT16 x, LPDF_UINT16 y, const char *text){ return LPDF_OK;}LPDF_STATUS LPDF_Page_SetRGBStroke(LPDF_Page page, LPDF_REAL r, LPDF_REAL g, LPDF_REAL b){ LPDF_INT length = 0;LPDF_UINT writeBytes = 0; LPDF_Doc pdf = (LPDF_Doc)page->doc; LPDF_STATUS ret = LPDF_Page_CheckState(page,LPDF_GMODE_TEXT_OBJECT|LPDF_GMODE_PAGE_DESCRIPTION); if(LPDF_OK != ret) return ret; length = LPDF_SPRINTF(pdf_buf,"%.1f %.1f %.1f RG\n",r,g,b); LPDF_FWRITE(&pdf->file,pdf_buf,length,&writeBytes); pdf->offset += length; page->length += length; return LPDF_OK;}LPDF_STATUS LPDF_Page_SetRGBFill(LPDF_Page page, LPDF_REAL r, LPDF_REAL g, LPDF_REAL b){ LPDF_INT length = 0;LPDF_UINT writeBytes = 0; LPDF_Doc pdf = (LPDF_Doc)page->doc; LPDF_STATUS ret = LPDF_Page_CheckState(page,LPDF_GMODE_TEXT_OBJECT|LPDF_GMODE_PAGE_DESCRIPTION); if(LPDF_OK != ret) return ret; length = LPDF_SPRINTF(pdf_buf,"%.1f %.1f %.1f rg\n",r,g,b); LPDF_FWRITE(&pdf->file,pdf_buf,length,&writeBytes); pdf->offset += length; page->length += length; return LPDF_OK;}LPDF_STATUS LPDF_Page_MoveTo (LPDF_Page page, LPDF_UINT16 x, LPDF_UINT16 y){ LPDF_INT length = 0;LPDF_UINT writeBytes = 0; LPDF_Doc pdf = (LPDF_Doc)page->doc; LPDF_STATUS ret = LPDF_Page_CheckState(page,LPDF_GMODE_PAGE_DESCRIPTION|LPDF_GMODE_PATH_OBJECT); if(LPDF_OK != ret) return ret; length = LPDF_SPRINTF(pdf_buf,"%d %d m\n",x,y); LPDF_FWRITE(&pdf->file,pdf_buf,length,&writeBytes); pdf->offset += length; page->length += length; page->gMode = LPDF_GMODE_PATH_OBJECT; return LPDF_OK;}LPDF_STATUS LPDF_Page_LineTo (LPDF_Page page, LPDF_UINT16 x, LPDF_UINT16 y){ LPDF_INT length = 0;LPDF_UINT writeBytes = 0; LPDF_Doc pdf = (LPDF_Doc)page->doc; LPDF_STATUS ret = LPDF_Page_CheckState(page,LPDF_GMODE_PATH_OBJECT); if(LPDF_OK != ret) return ret; length = LPDF_SPRINTF(pdf_buf,"%d %d l\n",x,y); LPDF_FWRITE(&pdf->file,pdf_buf,length,&writeBytes); pdf->offset += length; page->length += length; return LPDF_OK;}LPDF_STATUS LPDF_Page_Stroke(LPDF_Page page){ LPDF_Doc pdf = (LPDF_Doc)page->doc; LPDF_STATUS ret = LPDF_Page_CheckState(page,LPDF_GMODE_PATH_OBJECT); if(LPDF_OK != ret) return ret; LPDF_FPRINTF(&pdf->file,"S\n"); pdf->offset += 2; page->length += 2; page->gMode = LPDF_GMODE_PAGE_DESCRIPTION; return LPDF_OK;}LPDF_STATUS LPDF_Page_DrawImage(LPDF_Page page, LPDF_Image image, LPDF_UINT16 x, LPDF_UINT16 y, LPDF_UINT16 width, LPDF_UINT16 height){return LPDF_OK;}对于pdf文件结构可以去查看pdf参考手册，这里我看的是pdf-1.4参考手册，该库的测试代码我是在基于LPC54608库中的sdcard_fatfs示例改编的，关键代码如下:
测试代码很简单，生成了一个含有两个page的pdf文件，在第一页中用了不同的字体来显示同一个字符串，可以参考libHaru中的font_demo示例，第二页中是画了一个立方体图，下载代码到目标板，并运行该示例，串口终端输出如下：
拔下板上的SD卡，插入到PC上，可以看到red.pdf文件
使用pdf阅读器打开该文件，截图如下：
pdflib库目前来说还是比较简单的，需慢慢完善，
pdfgen库链接如下：https://github.com/AndreRenaud/PDFGen
pdflib下载链接：上传了半天没反应，有需要的可以去我的资源里面找下，这里就不放链接了。
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