diff options
| -rw-r--r-- | html/en/drv/printer.html | 22 | ||||
| -rw-r--r-- | src/wd.c | 6 | ||||
| -rw-r--r-- | src/win32/cdwin.c | 2 |
3 files changed, 27 insertions, 3 deletions
diff --git a/html/en/drv/printer.html b/html/en/drv/printer.html index 3ef31d4..6b6ca19 100644 --- a/html/en/drv/printer.html +++ b/html/en/drv/printer.html @@ -84,6 +84,28 @@ before creating the canvas.</p> the name of the selected printer.</li> </ul> +<h3>Notes</h3> + +<h4>Patterns</h4> +<p>Usually when printing regions filled with patterns you have to compensate for +the printer high resolution or the pattern will come out very small. If you +don't want to create a high resolution version of your pattern, then the +simplest way is to use <strong>wdCanvasPattern</strong> to resize the pattern to +an expected millimeter size. This will increase the pattern raster size so it +will be more visible in the printer.</p> +<p>But on some printers the result were not what we expect:</p> +<ul> + <li> + Laser printers automatically increase the real size of the pattern, so it + seems that <strong>wdCanvasPattern</strong> is not necessary on those + printers.</li> + <li> + PDF and Postscript based printer drivers (like Adobe PDF Creator and CutePDF + Writer) need that the pattern has a width multiple of 8, if not they will + appear distorted with an increasing horizontal shift on every line. This + does NOT applies to the CD_PDF or CD_PS drivers.</li> +</ul> + </body> </html> @@ -522,7 +522,7 @@ void wdCanvasGetTextBounds(cdCanvas* canvas, double x, double y, const char *s, void wdCanvasPattern(cdCanvas* canvas, int w, int h, const long *color, double w_mm, double h_mm) { - long *pattern = 0; + long *pattern = NULL; int w_pxl, h_pxl, x, y, cx, cy; int wratio, hratio; int *XTab, *YTab; @@ -531,6 +531,7 @@ void wdCanvasPattern(cdCanvas* canvas, int w, int h, const long *color, double w cdCanvasMM2Pixel(canvas, w_mm, h_mm, &w_pxl, &h_pxl); + /* to preserve the pattern characteristics must be an integer number */ wratio = cdRound((double)w_pxl/(double)w); hratio = cdRound((double)h_pxl/(double)h); @@ -564,7 +565,7 @@ void wdCanvasPattern(cdCanvas* canvas, int w, int h, const long *color, double w void wdCanvasStipple(cdCanvas* canvas, int w, int h, const unsigned char *fgbg, double w_mm, double h_mm) { - unsigned char *stipple = 0; + unsigned char *stipple = NULL; int w_pxl, h_pxl, x, y, cx, cy; int wratio, hratio; int *XTab, *YTab; @@ -573,6 +574,7 @@ void wdCanvasStipple(cdCanvas* canvas, int w, int h, const unsigned char *fgbg, cdCanvasMM2Pixel(canvas, w_mm, h_mm, &w_pxl, &h_pxl); + /* to preserve the pattern characteristics must be an integer number */ wratio = cdRound((double)w_pxl/(double)w); hratio = cdRound((double)h_pxl/(double)h); diff --git a/src/win32/cdwin.c b/src/win32/cdwin.c index 4b38187..313e833 100644 --- a/src/win32/cdwin.c +++ b/src/win32/cdwin.c @@ -595,7 +595,7 @@ static void cdpattern(cdCtxCanvas* ctxcanvas, int w, int h, const long int *colo if (!cdwCreateDIB(&dib)) return; - /* important to preserve pattern size during printing */ + /* trying to preserve pattern size during printing */ set_dib_res(&dib, ctxcanvas); cdwDIBEncodePattern(&dib, colors); |