code_app/modules/imgfmt/HGPdfImpl.hpp

#ifndef __HGPDFIMPL_HPP__
#define __HGPDFIMPL_HPP__

#include "HGPdf.h"
#include "../base/HGDll.h"
#include "mupdf/pdf.h"
#include "mupdf/fitz.h"
#include "pdflib.h"

class HGPdfReaderImpl
{
public:
	HGPdfReaderImpl();
	~HGPdfReaderImpl();

	HGResult Open(const HGChar* fileName);
	HGResult Close();
	HGResult GetPageCount(HGUInt* count);
	HGResult GetPageInfo(HGUInt page, HGPdfPageInfo* info);
	HGResult LoadImage(HGUInt page, HGFloat xScale, HGFloat yScale,
		HGUInt imgType, HGUInt imgOrigin, HGImage* image);

private:
	fz_context* fz_new_context_imp(const fz_alloc_context* alloc, const fz_locks_context* locks, size_t max_store, const char* version);
	void fz_register_document_handlers(fz_context* ctx);
	fz_document* fz_open_document(fz_context* ctx, const char* filename);
	void fz_drop_context(fz_context* ctx);
	void fz_drop_document(fz_context* ctx, fz_document* doc);
	int fz_count_pages(fz_context* ctx, fz_document* doc);
	fz_page* fz_load_page(fz_context* ctx, fz_document* doc, int number);
	pdf_page* pdf_page_from_fz_page(fz_context* ctx, fz_page* ptr);
	fz_rect pdf_bound_page(fz_context* ctx, pdf_page* page);
	void fz_drop_page(fz_context* ctx, fz_page* page);
	fz_matrix fz_scale(float sx, float sy);
	fz_pixmap* fz_new_pixmap_from_page_number(fz_context* ctx, fz_document* doc, int number, fz_matrix ctm, fz_colorspace* cs, int alpha);
	fz_colorspace* fz_device_rgb(fz_context* ctx);
	int fz_pixmap_width(fz_context* ctx, const fz_pixmap* pix);
	int fz_pixmap_height(fz_context* ctx, const fz_pixmap* pix);
	void fz_drop_pixmap(fz_context* ctx, fz_pixmap* pix);
	fz_jmp_buf* fz_push_try(fz_context* ctx);
	int fz_do_try(fz_context* ctx);
	int fz_do_catch(fz_context* ctx);

private:
	HGDll m_dll;
	fz_context* m_pContext;
	fz_document* m_pDoc;
};

class HGPdfImageWriterImpl
{
public:
	HGPdfImageWriterImpl();
	~HGPdfImageWriterImpl();

	HGResult Open(const HGChar* fileName);
	HGResult Close();
	HGResult SaveJpegImage(HGImage image, const HGJpegSaveInfo* info);

private:
	PDF* PDF_new(void);
	void PDF_set_parameter(PDF* p, const char* key, const char* value);
	int PDF_begin_document(PDF* p, const char* filename, int len, const char* optlist);
	void PDF_delete(PDF* p);
	void PDF_end_document(PDF* p, const char* optlist);
	void PDF_create_pvf(PDF* p, const char* filename, int len, const void* data, size_t size, const char* optlist);
	int PDF_load_image(PDF* p, const char* imagetype, const char* filename, int len, const char* optlist);
	void PDF_begin_page_ext(PDF* p, double width, double height, const char* optlist);
	void PDF_fit_image(PDF* p, int image, double x, double y, const char* optlist);
	void PDF_end_page_ext(PDF* p, const char* optlist);
	void PDF_close_image(PDF* p, int image);
	int PDF_delete_pvf(PDF* p, const char* filename, int len);
	pdf_jmpbuf* pdf_jbuf(PDF* p);
	int pdf_catch(PDF* p);

private:
	HGDll m_dll;
	PDF* m_pPdf;
};

#endif /* __HGPDFIMPL_HPP__ */