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Editing: ext_gstate_demo.py
### ## * << Haru Free PDF Library 2.0.0 >> -- ext_gstate_demo.c ## * ## * Copyright (c) 1999-2006 Takeshi Kanno <takeshi_kanno@est.hi-ho.ne.jp> ## * ## * Permission to use, copy, modify, distribute and sell this software ## * and its documentation for any purpose is hereby granted without fee, ## * provided that the above copyright notice appear in all copies and ## * that both that copyright notice and this permission notice appear ## * in supporting documentation. ## * It is provided "as is" without express or implied warranty. ## * ## ## port to python by Li Jun ## http://groups.google.com/group/pythoncia import os, sys from ctypes import * up=2 def setlibpath(up): import sys path=os.path.normpath(os.path.split(os.path.realpath(__file__))[0]+'\..'*up) if path not in sys.path: sys.path.append(path) setlibpath(up) from haru import * from haru.c_func import * from haru.hpdf_errorcode import * @HPDF_Error_Handler(None, HPDF_UINT, HPDF_UINT, c_void_p) def error_handler (error_no, detail_no, user_data): global pdf printf ("ERROR: %s, detail_no=%u\n", error_detail[error_no], detail_no) HPDF_Free (pdf) sys.exit(1) def draw_circles (page, description, x, y): HPDF_Page_SetLineWidth (page, 1.0) HPDF_Page_SetRGBStroke (page, 0.0, 0.0, 0.0) HPDF_Page_SetRGBFill (page, 1.0, 0.0, 0.0) HPDF_Page_Circle (page, x + 40, y + 40, 40) HPDF_Page_ClosePathFillStroke (page) HPDF_Page_SetRGBFill (page, 0.0, 1.0, 0.0) HPDF_Page_Circle (page, x + 100, y + 40, 40) HPDF_Page_ClosePathFillStroke (page) HPDF_Page_SetRGBFill (page, 0.0, 0.0, 1.0) HPDF_Page_Circle (page, x + 70, y + 74.64, 40) HPDF_Page_ClosePathFillStroke (page) HPDF_Page_SetRGBFill (page, 0.0, 0.0, 0.0) HPDF_Page_BeginText (page) HPDF_Page_TextOut (page, x + 0.0, y + 130.0, description) HPDF_Page_EndText (page) def main (): global pdf PAGE_WIDTH = 600 PAGE_HEIGHT = 900 fname=os.path.realpath(sys.argv[0]) fname=fname[:fname.rfind('.')]+'.pdf' pdf = HPDF_New (error_handler, NULL) if (not pdf): printf ("error: cannot create PdfDoc object\n") return 1 hfont = HPDF_GetFont (pdf, "Helvetica-Bold", NULL) # add a new page object. page = HPDF_AddPage (pdf) HPDF_Page_SetFontAndSize (page, hfont, 10) HPDF_Page_SetHeight (page, PAGE_HEIGHT) HPDF_Page_SetWidth (page, PAGE_WIDTH) # normal HPDF_Page_GSave (page) draw_circles (page, "normal", 40.0, PAGE_HEIGHT - 170) HPDF_Page_GRestore (page) # transparency (0.8) HPDF_Page_GSave (page) gstate = HPDF_CreateExtGState (pdf) HPDF_ExtGState_SetAlphaFill (gstate, 0.8) HPDF_ExtGState_SetAlphaStroke (gstate, 0.8) HPDF_Page_SetExtGState (page, gstate) draw_circles (page, "alpha fill = 0.8", 230.0, PAGE_HEIGHT - 170) HPDF_Page_GRestore (page) # transparency (0.4) HPDF_Page_GSave (page) gstate = HPDF_CreateExtGState (pdf) HPDF_ExtGState_SetAlphaFill (gstate, 0.4) HPDF_Page_SetExtGState (page, gstate) draw_circles (page, "alpha fill = 0.4", 420.0, PAGE_HEIGHT - 170) HPDF_Page_GRestore (page) # blend-mode=HPDF_BM_MULTIPLY HPDF_Page_GSave (page) gstate = HPDF_CreateExtGState (pdf) HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_MULTIPLY) HPDF_Page_SetExtGState (page, gstate) draw_circles (page, "HPDF_BM_MULTIPLY", 40.0, PAGE_HEIGHT - 340) HPDF_Page_GRestore (page) # blend-mode=HPDF_BM_SCREEN HPDF_Page_GSave (page) gstate = HPDF_CreateExtGState (pdf) HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_SCREEN) HPDF_Page_SetExtGState (page, gstate) draw_circles (page, "HPDF_BM_SCREEN", 230.0, PAGE_HEIGHT - 340) HPDF_Page_GRestore (page) # blend-mode=HPDF_BM_OVERLAY HPDF_Page_GSave (page) gstate = HPDF_CreateExtGState (pdf) HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_OVERLAY) HPDF_Page_SetExtGState (page, gstate) draw_circles (page, "HPDF_BM_OVERLAY", 420.0, PAGE_HEIGHT - 340) HPDF_Page_GRestore (page) # blend-mode=HPDF_BM_DARKEN HPDF_Page_GSave (page) gstate = HPDF_CreateExtGState (pdf) HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_DARKEN) HPDF_Page_SetExtGState (page, gstate) draw_circles (page, "HPDF_BM_DARKEN", 40.0, PAGE_HEIGHT - 510) HPDF_Page_GRestore (page) # blend-mode=HPDF_BM_LIGHTEN HPDF_Page_GSave (page) gstate = HPDF_CreateExtGState (pdf) HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_LIGHTEN) HPDF_Page_SetExtGState (page, gstate) draw_circles (page, "HPDF_BM_LIGHTEN", 230.0, PAGE_HEIGHT - 510) HPDF_Page_GRestore (page) # blend-mode=HPDF_BM_COLOR_DODGE HPDF_Page_GSave (page) gstate = HPDF_CreateExtGState (pdf) HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_COLOR_DODGE) HPDF_Page_SetExtGState (page, gstate) draw_circles (page, "HPDF_BM_COLOR_DODGE", 420.0, PAGE_HEIGHT - 510) HPDF_Page_GRestore (page) # blend-mode=HPDF_BM_COLOR_BUM HPDF_Page_GSave (page) gstate = HPDF_CreateExtGState (pdf) HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_COLOR_BUM) HPDF_Page_SetExtGState (page, gstate) draw_circles (page, "HPDF_BM_COLOR_BUM", 40.0, PAGE_HEIGHT - 680) HPDF_Page_GRestore (page) # blend-mode=HPDF_BM_HARD_LIGHT HPDF_Page_GSave (page) gstate = HPDF_CreateExtGState (pdf) HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_HARD_LIGHT) HPDF_Page_SetExtGState (page, gstate) draw_circles (page, "HPDF_BM_HARD_LIGHT", 230.0, PAGE_HEIGHT - 680) HPDF_Page_GRestore (page) # blend-mode=HPDF_BM_SOFT_LIGHT HPDF_Page_GSave (page) gstate = HPDF_CreateExtGState (pdf) HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_SOFT_LIGHT) HPDF_Page_SetExtGState (page, gstate) draw_circles (page, "HPDF_BM_SOFT_LIGHT", 420.0, PAGE_HEIGHT - 680) HPDF_Page_GRestore (page) # blend-mode=HPDF_BM_DIFFERENCE HPDF_Page_GSave (page) gstate = HPDF_CreateExtGState (pdf) HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_DIFFERENCE) HPDF_Page_SetExtGState (page, gstate) draw_circles (page, "HPDF_BM_DIFFERENCE", 40.0, PAGE_HEIGHT - 850) HPDF_Page_GRestore (page) # blend-mode=HPDF_BM_EXCLUSHON HPDF_Page_GSave (page) gstate = HPDF_CreateExtGState (pdf) HPDF_ExtGState_SetBlendMode (gstate, HPDF_BM_EXCLUSHON) HPDF_Page_SetExtGState (page, gstate) draw_circles (page, "HPDF_BM_EXCLUSHON", 230.0, PAGE_HEIGHT - 850) HPDF_Page_GRestore (page) # save the document to a file HPDF_SaveToFile (pdf, fname) # clean up HPDF_Free (pdf) return 0 main()
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