libharu-dox/line_demo_8c-example.html

/*

 * << Haru Free PDF Library 2.0.0 >> -- line_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.

 *

 */


#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include "hpdf.h"

#include "handler.h"


void

draw_line  (HPDF_Page    page,

            float        x,

            float        y,

            const char  *label)

{

    HPDF_Page_BeginText (page);

    HPDF_Page_MoveTextPos (page, x, y - 10);

    HPDF_Page_ShowText (page, label);

    HPDF_Page_EndText (page);


    HPDF_Page_MoveTo (page, x, y - 15);

    HPDF_Page_LineTo (page, x + 220, y - 15);

    HPDF_Page_Stroke (page);

}


void

draw_line2  (HPDF_Page    page,

             float       x,

             float       y,

             const char  *label)

{

    HPDF_Page_BeginText (page);

    HPDF_Page_MoveTextPos (page, x, y);

    HPDF_Page_ShowText (page, label);

    HPDF_Page_EndText (page);


    HPDF_Page_MoveTo (page, x + 30, y - 25);

    HPDF_Page_LineTo (page, x + 160, y - 25);

    HPDF_Page_Stroke (page);

}


void

draw_rect (HPDF_Page     page,

           double        x,

           double        y,

           const char   *label)

{

    HPDF_Page_BeginText (page);

    HPDF_Page_MoveTextPos (page, x, y - 10);

    HPDF_Page_ShowText (page, label);

    HPDF_Page_EndText (page);


    HPDF_Page_Rectangle(page, x, y - 40, 220, 25);

}


int main (int argc, char **argv)

{

    const char* page_title = "Line Example";


    HPDF_Doc  pdf;

    HPDF_Font font;

    HPDF_Page page;

    char fname[256];


    const HPDF_REAL DASH_MODE1[] = {3};

    const HPDF_REAL DASH_MODE2[] = {3, 7};

    const HPDF_REAL DASH_MODE3[] = {8, 7, 2, 7};


    double x;

    double y;

    double x1;

    double y1;

    double x2;

    double y2;

    double x3;

    double y3;


    float tw;


    strcpy (fname, argv[0]);

    strcat (fname, ".pdf");


    pdf = HPDF_New (demo_error_handler, NULL);

    if (!pdf) {

        printf ("error: cannot create PdfDoc object\n");

        return 1;

    }


    if (setjmp(env)) {

        HPDF_Free (pdf);

        return 1;

    }


    /* create default-font */

    font = HPDF_GetFont (pdf, "Helvetica", NULL);


    /* add a new page object. */

    page = HPDF_AddPage (pdf);


    /* print the lines of the page. */

    HPDF_Page_SetLineWidth (page, 1);

    HPDF_Page_Rectangle (page, 50, 50, HPDF_Page_GetWidth(page) - 100,

                HPDF_Page_GetHeight (page) - 110);

    HPDF_Page_Stroke (page);


    /* print the title of the page (with positioning center). */

    HPDF_Page_SetFontAndSize (page, font, 24);

    tw = HPDF_Page_TextWidth (page, page_title);

    HPDF_Page_BeginText (page);

    HPDF_Page_MoveTextPos (page, (HPDF_Page_GetWidth(page) - tw) / 2,

                HPDF_Page_GetHeight (page) - 50);

    HPDF_Page_ShowText (page, page_title);

    HPDF_Page_EndText (page);


    HPDF_Page_SetFontAndSize (page, font, 10);


    /* Draw various widths of lines. */

    HPDF_Page_SetLineWidth (page, 0);

    draw_line (page, 60, 770, "line width = 0");


    HPDF_Page_SetLineWidth (page, 1.0);

    draw_line (page, 60, 740, "line width = 1.0");


    HPDF_Page_SetLineWidth (page, 2.0);

    draw_line (page, 60, 710, "line width = 2.0");


    /* Line dash pattern */

    HPDF_Page_SetLineWidth (page, 1.0);


    HPDF_Page_SetDash (page, DASH_MODE1, 1, 1);

    draw_line (page, 60, 680, "dash_ptn=[3], phase=1 -- "

                "2 on, 3 off, 3 on...");


    HPDF_Page_SetDash (page, DASH_MODE2, 2, 2);

    draw_line (page, 60, 650, "dash_ptn=[7, 3], phase=2 -- "

                "5 on 3 off, 7 on,...");


    HPDF_Page_SetDash (page, DASH_MODE3, 4, 0);

    draw_line (page, 60, 620, "dash_ptn=[8, 7, 2, 7], phase=0");


    HPDF_Page_SetDash (page, NULL, 0, 0);


    HPDF_Page_SetLineWidth (page, 30);

    HPDF_Page_SetRGBStroke (page, 0.0, 0.5, 0.0);


    /* Line Cap Style */

    HPDF_Page_SetLineCap (page, HPDF_BUTT_END);

    draw_line2 (page, 60, 570, "PDF_BUTT_END");


    HPDF_Page_SetLineCap (page, HPDF_ROUND_END);

    draw_line2 (page, 60, 505, "PDF_ROUND_END");


    HPDF_Page_SetLineCap (page, HPDF_PROJECTING_SQUARE_END);

    draw_line2 (page, 60, 440, "PDF_PROJECTING_SCUARE_END");


    /* Line Join Style */

    HPDF_Page_SetLineWidth (page, 30);

    HPDF_Page_SetRGBStroke (page, 0.0, 0.0, 0.5);


    HPDF_Page_SetLineJoin (page, HPDF_MITER_JOIN);

    HPDF_Page_MoveTo (page, 120, 300);

    HPDF_Page_LineTo (page, 160, 340);

    HPDF_Page_LineTo (page, 200, 300);

    HPDF_Page_Stroke (page);


    HPDF_Page_BeginText (page);

    HPDF_Page_MoveTextPos (page, 60, 360);

    HPDF_Page_ShowText (page, "PDF_MITER_JOIN");

    HPDF_Page_EndText (page);


    HPDF_Page_SetLineJoin (page, HPDF_ROUND_JOIN);

    HPDF_Page_MoveTo (page, 120, 195);

    HPDF_Page_LineTo (page, 160, 235);

    HPDF_Page_LineTo (page, 200, 195);

    HPDF_Page_Stroke (page);


    HPDF_Page_BeginText (page);

    HPDF_Page_MoveTextPos (page, 60, 255);

    HPDF_Page_ShowText (page, "PDF_ROUND_JOIN");

    HPDF_Page_EndText (page);


    HPDF_Page_SetLineJoin (page, HPDF_BEVEL_JOIN);

    HPDF_Page_MoveTo (page, 120, 90);

    HPDF_Page_LineTo (page, 160, 130);

    HPDF_Page_LineTo (page, 200, 90);

    HPDF_Page_Stroke (page);


    HPDF_Page_BeginText (page);

    HPDF_Page_MoveTextPos (page, 60, 150);

    HPDF_Page_ShowText (page, "PDF_BEVEL_JOIN");

    HPDF_Page_EndText (page);


    /* Draw Rectangle */

    HPDF_Page_SetLineWidth (page, 2);

    HPDF_Page_SetRGBStroke (page, 0, 0, 0);

    HPDF_Page_SetRGBFill (page, 0.75, 0.0, 0.0);


    draw_rect (page, 300, 770, "Stroke");

    HPDF_Page_Stroke (page);


    draw_rect (page, 300, 720, "Fill");

    HPDF_Page_Fill (page);


    draw_rect (page, 300, 670, "Fill then Stroke");

    HPDF_Page_FillStroke (page);


    /* Clip Rect */

    HPDF_Page_GSave (page);  /* Save the current graphic state */

    draw_rect (page, 300, 620, "Clip Rectangle");

    HPDF_Page_Clip (page);

    HPDF_Page_Stroke (page);

    HPDF_Page_SetFontAndSize (page, font, 13);


    HPDF_Page_BeginText (page);

    HPDF_Page_MoveTextPos (page, 290, 600);

    HPDF_Page_SetTextLeading (page, 12);

    HPDF_Page_ShowText (page,

                "Clip Clip Clip Clip Clip Clipi Clip Clip Clip");

    HPDF_Page_ShowTextNextLine (page,

                "Clip Clip Clip Clip Clip Clip Clip Clip Clip");

    HPDF_Page_ShowTextNextLine (page,

                "Clip Clip Clip Clip Clip Clip Clip Clip Clip");

    HPDF_Page_EndText (page);

    HPDF_Page_GRestore (page);


    /* Curve Example(CurveTo2) */

    x = 330;

    y = 440;

    x1 = 430;

    y1 = 530;

    x2 = 480;

    y2 = 470;

    x3 = 480;

    y3 = 90;


    HPDF_Page_SetRGBFill (page, 0, 0, 0);


    HPDF_Page_BeginText (page);

    HPDF_Page_MoveTextPos (page, 300, 540);

    HPDF_Page_ShowText (page, "CurveTo2(x1, y1, x2. y2)");

    HPDF_Page_EndText (page);


    HPDF_Page_BeginText (page);

    HPDF_Page_MoveTextPos (page, x + 5, y - 5);

    HPDF_Page_ShowText (page, "Current point");

    HPDF_Page_MoveTextPos (page, x1 - x, y1 - y);

    HPDF_Page_ShowText (page, "(x1, y1)");

    HPDF_Page_MoveTextPos (page, x2 - x1, y2 - y1);

    HPDF_Page_ShowText (page, "(x2, y2)");

    HPDF_Page_EndText (page);


    HPDF_Page_SetDash (page, DASH_MODE1, 1, 0);


    HPDF_Page_SetLineWidth (page, 0.5);

    HPDF_Page_MoveTo (page, x1, y1);

    HPDF_Page_LineTo (page, x2, y2);

    HPDF_Page_Stroke (page);


    HPDF_Page_SetDash (page, NULL, 0, 0);


    HPDF_Page_SetLineWidth (page, 1.5);


    HPDF_Page_MoveTo (page, x, y);

    HPDF_Page_CurveTo2 (page, x1, y1, x2, y2);

    HPDF_Page_Stroke (page);


    /* Curve Example(CurveTo3) */

    y -= 150;

    y1 -= 150;

    y2 -= 150;


    HPDF_Page_BeginText (page);

    HPDF_Page_MoveTextPos (page, 300, 390);

    HPDF_Page_ShowText (page, "CurveTo3(x1, y1, x2. y2)");

    HPDF_Page_EndText (page);


    HPDF_Page_BeginText (page);

    HPDF_Page_MoveTextPos (page, x + 5, y - 5);

    HPDF_Page_ShowText (page, "Current point");

    HPDF_Page_MoveTextPos (page, x1 - x, y1 - y);

    HPDF_Page_ShowText (page, "(x1, y1)");

    HPDF_Page_MoveTextPos (page, x2 - x1, y2 - y1);

    HPDF_Page_ShowText (page, "(x2, y2)");

    HPDF_Page_EndText (page);


    HPDF_Page_SetDash (page, DASH_MODE1, 1, 0);


    HPDF_Page_SetLineWidth (page, 0.5);

    HPDF_Page_MoveTo (page, x, y);

    HPDF_Page_LineTo (page, x1, y1);

    HPDF_Page_Stroke (page);


    HPDF_Page_SetDash (page, NULL, 0, 0);


    HPDF_Page_SetLineWidth (page, 1.5);

    HPDF_Page_MoveTo (page, x, y);

    HPDF_Page_CurveTo3 (page, x1, y1, x2, y2);

    HPDF_Page_Stroke (page);


    /* Curve Example(CurveTo) */

    y -= 150;

    y1 -= 160;

    y2 -= 130;

    x2 += 10;


    HPDF_Page_BeginText (page);

    HPDF_Page_MoveTextPos (page, 300, 240);

    HPDF_Page_ShowText (page, "CurveTo(x1, y1, x2. y2, x3, y3)");

    HPDF_Page_EndText (page);


    HPDF_Page_BeginText (page);

    HPDF_Page_MoveTextPos (page, x + 5, y - 5);

    HPDF_Page_ShowText (page, "Current point");

    HPDF_Page_MoveTextPos (page, x1 - x, y1 - y);

    HPDF_Page_ShowText (page, "(x1, y1)");

    HPDF_Page_MoveTextPos (page, x2 - x1, y2 - y1);

    HPDF_Page_ShowText (page, "(x2, y2)");

    HPDF_Page_MoveTextPos (page, x3 - x2, y3 - y2);

    HPDF_Page_ShowText (page, "(x3, y3)");

    HPDF_Page_EndText (page);


    HPDF_Page_SetDash (page, DASH_MODE1, 1, 0);


    HPDF_Page_SetLineWidth (page, 0.5);

    HPDF_Page_MoveTo (page, x, y);

    HPDF_Page_LineTo (page, x1, y1);

    HPDF_Page_Stroke (page);

    HPDF_Page_MoveTo (page, x2, y2);

    HPDF_Page_LineTo (page, x3, y3);

    HPDF_Page_Stroke (page);


    HPDF_Page_SetDash (page, NULL, 0, 0);


    HPDF_Page_SetLineWidth (page, 1.5);

    HPDF_Page_MoveTo (page, x, y);

    HPDF_Page_CurveTo (page, x1, y1, x2, y2, x3, y3);

    HPDF_Page_Stroke (page);


    /* save the document to a file */

    HPDF_SaveToFile (pdf, fname);


    /* clean up */

    HPDF_Free (pdf);


    return 0;

}


HPDF_SaveToFile
HPDF_STATUS HPDF_SaveToFile(HPDF_Doc pdf, const char *filename)
Saves the current document to file.

HPDF_Free
void HPDF_Free(HPDF_Doc pdf)
Revoke a document object and all resources.

HPDF_New
HPDF_Doc HPDF_New(HPDF_Error_Handler user_error_fn, void *user_data)
Create an instance of a document object and initialize it.

HPDF_GetFont
HPDF_Font HPDF_GetFont(HPDF_Doc pdf, const char *font_name, const char *encoding_name)
Get requested font object handle.

HPDF_Page_SetLineWidth
HPDF_STATUS HPDF_Page_SetLineWidth(HPDF_Page page, HPDF_REAL line_width)
Set width of the line used to stroke paths.

HPDF_Page_CurveTo2
HPDF_STATUS HPDF_Page_CurveTo2(HPDF_Page page, HPDF_REAL x2, HPDF_REAL y2, HPDF_REAL x3, HPDF_REAL y3)
Append Bézier curve to current path using current point and (x2, y2) and (x3, y3) as control points....

HPDF_Page_Stroke
HPDF_STATUS HPDF_Page_Stroke(HPDF_Page page)
Paint current path.

HPDF_Page_SetRGBStroke
HPDF_STATUS HPDF_Page_SetRGBStroke(HPDF_Page page, HPDF_REAL r, HPDF_REAL g, HPDF_REAL b)
Set stroke color (RGB).

HPDF_Page_MoveTo
HPDF_STATUS HPDF_Page_MoveTo(HPDF_Page page, HPDF_REAL x, HPDF_REAL y)
Start new subpath and move current point for drawing path.

HPDF_Page_ShowTextNextLine
HPDF_STATUS HPDF_Page_ShowTextNextLine(HPDF_Page page, const char *text)
Move current text position to the start of the next line, then put the text at the current text posit...

HPDF_Page_SetRGBFill
HPDF_STATUS HPDF_Page_SetRGBFill(HPDF_Page page, HPDF_REAL r, HPDF_REAL g, HPDF_REAL b)
Set filling color (RGB).

HPDF_Page_CurveTo3
HPDF_STATUS HPDF_Page_CurveTo3(HPDF_Page page, HPDF_REAL x1, HPDF_REAL y1, HPDF_REAL x3, HPDF_REAL y3)
Append Bézier curve to the current path using two spesified points. The point (x1,...

HPDF_Page_SetTextLeading
HPDF_STATUS HPDF_Page_SetTextLeading(HPDF_Page page, HPDF_REAL value)
Set text leading (line spacing).

HPDF_Page_SetLineCap
HPDF_STATUS HPDF_Page_SetLineCap(HPDF_Page page, HPDF_LineCap line_cap)
Set lines endpoints shape style.

HPDF_Page_GSave
HPDF_STATUS HPDF_Page_GSave(HPDF_Page page)
Save the page's current graphics state to the stack.

HPDF_Page_FillStroke
HPDF_STATUS HPDF_Page_FillStroke(HPDF_Page page)
Fill current path using the even-odd rule.

HPDF_Page_SetFontAndSize
HPDF_STATUS HPDF_Page_SetFontAndSize(HPDF_Page page, HPDF_Font font, HPDF_REAL size)
Set the type of font and size leading.

HPDF_Page_Rectangle
HPDF_STATUS HPDF_Page_Rectangle(HPDF_Page page, HPDF_REAL x, HPDF_REAL y, HPDF_REAL width, HPDF_REAL height)
Append rectangle to the current path.

HPDF_Page_CurveTo
HPDF_STATUS HPDF_Page_CurveTo(HPDF_Page page, HPDF_REAL x1, HPDF_REAL y1, HPDF_REAL x2, HPDF_REAL y2, HPDF_REAL x3, HPDF_REAL y3)
Append Bézier curve to current path using control points (x1, y1) and (x2, y2) and (x3,...

HPDF_Page_Clip
HPDF_STATUS HPDF_Page_Clip(HPDF_Page page)
Modify current clipping path by intersecting it with current path using the nonzero winding number ru...

HPDF_Page_SetLineJoin
HPDF_STATUS HPDF_Page_SetLineJoin(HPDF_Page page, HPDF_LineJoin line_join)
Set line join shape style.

HPDF_Page_Fill
HPDF_STATUS HPDF_Page_Fill(HPDF_Page page)
Fill current path using non-zero winding number rule.

HPDF_Page_SetDash
HPDF_STATUS HPDF_Page_SetDash(HPDF_Page page, const HPDF_REAL *dash_pattern, HPDF_UINT num_elem, HPDF_REAL phase)
Set dash pattern for lines in the page.

HPDF_Page_LineTo
HPDF_STATUS HPDF_Page_LineTo(HPDF_Page page, HPDF_REAL x, HPDF_REAL y)
Append path from current point to specified point.

HPDF_Page_ShowText
HPDF_STATUS HPDF_Page_ShowText(HPDF_Page page, const char *text)
Put text at the current text position on the page.

HPDF_Page_GRestore
HPDF_STATUS HPDF_Page_GRestore(HPDF_Page page)
Restore graphics state which is saved by HPDF_Page_GSave().

HPDF_Page_BeginText
HPDF_STATUS HPDF_Page_BeginText(HPDF_Page page)
Begin text object and set text position to (0, 0).

HPDF_Page_EndText
HPDF_STATUS HPDF_Page_EndText(HPDF_Page page)
Finish text object.

HPDF_Page_MoveTextPos
HPDF_STATUS HPDF_Page_MoveTextPos(HPDF_Page page, HPDF_REAL x, HPDF_REAL y)
Change current text position using the specified offset values.

HPDF_Page_TextWidth
HPDF_REAL HPDF_Page_TextWidth(HPDF_Page page, const char *text)
Get text width in current font size, character spacing and word spacing.

HPDF_Page_GetHeight
HPDF_REAL HPDF_Page_GetHeight(HPDF_Page page)
Get page height.

HPDF_AddPage
HPDF_Page HPDF_AddPage(HPDF_Doc pdf)
Create new page and add it after the last page of document.

HPDF_Page_GetWidth
HPDF_REAL HPDF_Page_GetWidth(HPDF_Page page)
Get page width.

hpdf.h

HPDF_PROJECTING_SQUARE_END
@ HPDF_PROJECTING_SQUARE_END
Definition: hpdf_types.h:309

HPDF_BUTT_END
@ HPDF_BUTT_END
Definition: hpdf_types.h:307

HPDF_ROUND_END
@ HPDF_ROUND_END
Definition: hpdf_types.h:308

HPDF_BEVEL_JOIN
@ HPDF_BEVEL_JOIN
Definition: hpdf_types.h:319

HPDF_MITER_JOIN
@ HPDF_MITER_JOIN
Definition: hpdf_types.h:317

HPDF_ROUND_JOIN
@ HPDF_ROUND_JOIN
Definition: hpdf_types.h:318

HPDF_REAL
float HPDF_REAL
Definition: hpdf_types.h:79

_HPDF_Dict_Rec
Definition: hpdf_objects.h:421

_HPDF_Doc_Rec
Definition: hpdf_doc.h:36