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42 lines
1.7 KiB
Diff
42 lines
1.7 KiB
Diff
From eb4e80afe3f25b1d91f00bdd8dbf67e38adad1f8 Mon Sep 17 00:00:00 2001
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From: Hans Breuer <hans@breuer.org>
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Date: Fri, 16 Aug 2013 15:21:16 +0200
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Subject: [PATCH 17/24] Bug 660574 - Avoid cairo going into an endless loop
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with too small arcs
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this should fix the issue with SADT flow arrow, although I could not reproduce it.
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---
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plug-ins/cairo/diacairo-renderer.c | 10 +++++++---
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1 file changed, 7 insertions(+), 3 deletions(-)
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diff --git a/plug-ins/cairo/diacairo-renderer.c b/plug-ins/cairo/diacairo-renderer.c
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index cd13247..137411e 100644
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--- a/plug-ins/cairo/diacairo-renderer.c
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+++ b/plug-ins/cairo/diacairo-renderer.c
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@@ -499,6 +499,7 @@ draw_arc(DiaRenderer *self,
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DiaCairoRenderer *renderer = DIA_CAIRO_RENDERER (self);
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Point start;
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double a1, a2;
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+ real onedu = 0.0;
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DIAG_NOTE(g_message("draw_arc %fx%f <%f,<%f",
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width, height, angle1, angle2));
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@@ -515,9 +516,12 @@ draw_arc(DiaRenderer *self,
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a1 = - (angle1 / 180.0) * G_PI;
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a2 = - (angle2 / 180.0) * G_PI;
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/* FIXME: to handle width != height some cairo_scale/cairo_translate would be needed */
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- cairo_arc_negative (renderer->cr, center->x, center->y,
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- width > height ? height / 2.0 : width / 2.0, /* FIXME 2nd radius */
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- a1, a2);
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+ ensure_minimum_one_device_unit (renderer, &onedu);
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+ /* FIXME2: with too small arcs cairo goes into an endless loop */
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+ if (height/2.0 > onedu && width/2.0 > onedu)
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+ cairo_arc_negative (renderer->cr, center->x, center->y,
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+ width > height ? height / 2.0 : width / 2.0, /* FIXME 2nd radius */
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+ a1, a2);
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cairo_stroke (renderer->cr);
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DIAG_STATE(renderer->cr)
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}
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--
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1.8.4.4
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