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app: use CAIRO_OPERATOR_SOURCE in gimp_display_shell_scroll()

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to copy around the render cache when scrolling.
This commit is contained in:
Michael Natterer 2019-07-17 00:18:00 +02:00
parent 2061cc0077
commit c393eff089
1 changed files with 2 additions and 0 deletions
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2
app/display/gimpdisplayshell-scroll.c
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@ -107,11 +107,13 @@ gimp_display_shell_scroll (GimpDisplayShell *shell,
shell->disp_height);
cr = cairo_create (surface);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_surface (cr, shell->render_cache, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
cr = cairo_create (shell->render_cache);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_surface (cr, surface,
-x_offset, -y_offset);
cairo_paint (cr);