<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> <title></title> </head> <body bgcolor="#ffffff" text="#000000"> <blockquote cite="mid:mailman.43.1185390015.4824.cairo@cairographics.org" type="cite"> <blockquote type="cite"> <pre wrap="">> Hi > I'm trying to use gtk printing in my app. It uses cairo to draw. > I'd like to fill paths with different hatches. I'm using the code > below to create a little part of the hatch and to repeat it to fill > the path. > The problem is that when I do it, there's a little space (a thin > and transparent line) between each repeat. For example, if I want > to repeat a completely black square (see the code below), it gives > me this result : <a class="moz-txt-link-freetext" href="http://img96.imageshack.us/img96/8747/">http://img96.imageshack.us/img96/8747/</a> > cairopblmcw6.png > I expected it to draw a completely black area. If I draw a line or > anything else instead of a black square, I get the same type of > result. > This result is displayed in the preview window of gtk printing (in > fact in evince). > Is there any way to suppress this line ? > Thanks. > > The code : > > cairo_t * cr; > cairo_surface_t *surface; > surface = cairo_surface_create_similar(cairo_get_target > (m_cairo),CAIRO_CONTENT_COLOR_ALPHA,5,5); > cr = cairo_create(surface); > cairo_set_line_cap(cr, CAIRO_LINE_CAP_SQUARE); > cairo_set_line_width(cr, 1); > cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE); > cairo_set_source_rgba(cr, redPS, greenPS, bluePS, alphaPS); //these > values give black color > cairo_paint(cr); > cairo_stroke (cr); > cairo_destroy(cr); > cairo_pattern_t * pattern = cairo_pattern_create_for_surface > (surface); > cairo_surface_destroy(surface); > cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT); > cairo_set_source(m_cairo, pattern); > //here i create a path in another cairo context (m_cairo) > //and i fill it with the pattern: > cairo_fill( m_cairo ); > </pre> </blockquote> I just replicated this code (I used a simple rectangle for the path), using the VW/ST binding for Cairo running on Quartz. It looks fine. So that'd point at possible X issues, rather than Cairo issues?</blockquote> <blockquote cite="mid:mailman.43.1185390015.4824.cairo@cairographics.org" type="cite">Couple thoughts. You don't need the cairo_stroke, or even the linewidth/cap, since you're using paint which fills the whole clip area.</blockquote> You're right. I leave it there since my first version of this code was drawing a line instead of using paint. <blockquote cite="mid:mailman.43.1185390015.4824.cairo@cairographics.org" type="cite">What happens if you turn ANTIALIAS back on? I would guess most/many of the Cairo cases leave AA on, so you may be in an area that doesn't get used much?</blockquote> I've tried to turn it on and it doesn't change anything (maybe the borders of the black squares are a little less sharp but I'm not even sure). <blockquote cite="mid:mailman.43.1185390015.4824.cairo@cairographics.org" type="cite">-- Travis Griggs Objologist "I choose. Therefore, I Am" -------------- next part -------------- An HTML attachment was scrubbed... URL: <a class="moz-txt-link-freetext" href="http://lists.cairographics.org/archives/cairo/attachments/20070724/0dcb9269/attachment.htm">http://lists.cairographics.org/archives/cairo/attachments/20070724/0dcb9269/attachment.htm</a> ------------------------------</blockquote> </body> </html>