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cairo-renderer: Update coding style and add comment explaining how to use the inter process communication to update the GUI with rendering status updates

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Mario Hüttel 2020-01-14 14:09:24 +01:00
parent 1ca04aaa71
commit 2d389342fd
1 changed files with 11 additions and 3 deletions
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14
output-renderers/cairo-renderer.c
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@ -275,12 +275,20 @@ static int cairo_renderer_render_cell_to_vector_file(GdsOutputRenderer *renderer
goto ret_parent; goto ret_parent;
} }
/* Close stdin and (stdout and stderr may live on) */ /* We are now in a separate process just for rendering the output image.
* You may print a log message to the activity bar of the gui by writing a line
* teminated with '\n' to comm_pipe[1]. This will be handled by the parent process.
* Directly calling the update function
* gds_output_renderer_update_async_progress()
* does not have any effect because this is a separate process.
*/
/*
* Close stdin and (stdout and stderr may live on)
*/
close(0); close(0);
//close(1);
close(comm_pipe[0]); close(comm_pipe[0]);
layers = (struct cairo_layer *)calloc(MAX_LAYERS, sizeof(struct cairo_layer)); layers = (struct cairo_layer *)calloc(MAX_LAYERS, sizeof(struct cairo_layer));
/* Clear layers */ /* Clear layers */