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EDIT :: image_demo.py

### ## * << Haru Free PDF Library 2.0.0 >> -- image_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 * from math 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 show_description (page, x, y, text): HPDF_Page_MoveTo (page, x, y - 10) HPDF_Page_LineTo (page, x, y + 10) HPDF_Page_MoveTo (page, x - 10, y) HPDF_Page_LineTo (page, x + 10, y) HPDF_Page_Stroke (page) HPDF_Page_SetFontAndSize (page, HPDF_Page_GetCurrentFont (page), 8) HPDF_Page_SetRGBFill (page, 0, 0, 0) HPDF_Page_BeginText (page) buf="(x=%d,y=%d)" % (int(x), int(y)) HPDF_Page_MoveTextPos (page, x - HPDF_Page_TextWidth (page, buf) - 5, y - 10) HPDF_Page_ShowText (page, buf) HPDF_Page_EndText (page) HPDF_Page_BeginText (page) HPDF_Page_MoveTextPos (page, x - 20, y - 25) HPDF_Page_ShowText (page, text) HPDF_Page_EndText (page) def main (): 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 HPDF_SetCompressionMode (pdf, HPDF_COMP_ALL) # create default-font font = HPDF_GetFont (pdf, "Helvetica", NULL) # add a new page object. page = HPDF_AddPage (pdf) HPDF_Page_SetWidth (page, 550) HPDF_Page_SetHeight (page, 500) dst = HPDF_Page_CreateDestination (page) HPDF_Destination_SetXYZ (dst, 0, HPDF_Page_GetHeight (page), 1) HPDF_SetOpenAction(pdf, dst) HPDF_Page_BeginText (page) HPDF_Page_SetFontAndSize (page, font, 20) HPDF_Page_MoveTextPos (page, 220, HPDF_Page_GetHeight (page) - 70) HPDF_Page_ShowText (page, "ImageDemo") HPDF_Page_EndText (page) # load image file. image = HPDF_LoadPngImageFromFile (pdf, "pngsuite/basn3p02.png") # image1 is masked by image2. image1 = HPDF_LoadPngImageFromFile (pdf, "pngsuite/basn3p02.png") # image2 is a mask image. image2 = HPDF_LoadPngImageFromFile (pdf, "pngsuite/basn0g01.png") # image3 is a RGB-color image. we use this image for color-mask # * demo. image3 = HPDF_LoadPngImageFromFile (pdf, "pngsuite/maskimage.png") iw = HPDF_Image_GetWidth (image) ih = HPDF_Image_GetHeight (image) HPDF_Page_SetLineWidth (page, 0.5) x = 100 y = HPDF_Page_GetHeight (page) - 150 # Draw image to the canvas. (normal-mode with actual size.) HPDF_Page_DrawImage (page, image, x, y, iw, ih) show_description (page, x, y, "Actual Size") x += 150 # Scalling image (X direction) HPDF_Page_DrawImage (page, image, x, y, iw * 1.5, ih) show_description (page, x, y, "Scalling image (X direction)") x += 150 # Scalling image (Y direction). HPDF_Page_DrawImage (page, image, x, y, iw, ih * 1.5) show_description (page, x, y, "Scalling image (Y direction)") x = 100 y -= 120 # Skewing image. angle1 = 10 angle2 = 20 rad1 = angle1 / 180 * 3.141592 rad2 = angle2 / 180 * 3.141592 HPDF_Page_GSave (page) HPDF_Page_Concat (page, iw, tan(rad1) * iw, tan(rad2) * ih, ih, x, y) HPDF_Page_ExecuteXObject (page, image) HPDF_Page_GRestore (page) show_description (page, x, y, "Skewing image") x += 150 # Rotating image angle = 30; # rotation of 30 degrees. rad = angle / 180 * 3.141592; # Calculate the radian value. HPDF_Page_GSave (page) HPDF_Page_Concat (page, iw * cos(rad), iw * sin(rad), ih * -sin(rad), ih * cos(rad), x, y) HPDF_Page_ExecuteXObject (page, image) HPDF_Page_GRestore (page) show_description (page, x, y, "Rotating image") x += 150 # draw masked image. # Set image2 to the mask image of image1 HPDF_Image_SetMaskImage (image1, image2) HPDF_Page_SetRGBFill (page, 0, 0, 0) HPDF_Page_BeginText (page) HPDF_Page_MoveTextPos (page, x - 6, y + 14) HPDF_Page_ShowText (page, "MASKMASK") HPDF_Page_EndText (page) HPDF_Page_DrawImage (page, image1, x - 3, y - 3, iw + 6, ih + 6) show_description (page, x, y, "masked image") x = 100 y -= 120 # color mask. HPDF_Page_SetRGBFill (page, 0, 0, 0) HPDF_Page_BeginText (page) HPDF_Page_MoveTextPos (page, x - 6, y + 14) HPDF_Page_ShowText (page, "MASKMASK") HPDF_Page_EndText (page) HPDF_Image_SetColorMask (image3, 0, 255, 0, 0, 0, 255) HPDF_Page_DrawImage (page, image3, x, y, iw, ih) show_description (page, x, y, "Color Mask") # save the document to a file HPDF_SaveToFile (pdf, fname) # clean up HPDF_Free (pdf) return 0 if HPDF_NOPNGLIB: printf("WARNING: if you want to run this demo, \n" "make libhpdf with HPDF_USE_PNGLIB option.\n") sys.exit(1) else: main()

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