[cairo] [PATCH] spans: Fix the size of the span buffer for tor scan converter

[Taekyun Kim]

Ooops,
I intended "max_num_spans = xmax - xmin + 1"
sorry for the confusion.

On 10/17/2011 08:39 PM, Taekyun Kim wrote:
> From: Taekyun Kim<tkq.kim at samsung.com>
>
> X coordinate of a span can range between xmin and xmax. So we have
> to allocate (xmax - xmin + 1) slots for spans.
> ---
>   src/cairo-tor-scan-converter.c |    7 +++++--
>   1 files changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/src/cairo-tor-scan-converter.c b/src/cairo-tor-scan-converter.c
> index b001bbd..de10f67 100644
> --- a/src/cairo-tor-scan-converter.c
> +++ b/src/cairo-tor-scan-converter.c
> @@ -1428,12 +1428,15 @@ glitter_scan_converter_reset(
>   			     int xmax, int ymax)
>   {
>       glitter_status_t status;
> +    int max_num_spans;
>
>       converter->xmin = 0; converter->xmax = 0;
>       converter->ymin = 0; converter->ymax = 0;
>
> -    if (xmax - xmin>  ARRAY_LENGTH(converter->spans_embedded)) {
> -	converter->spans = _cairo_malloc_ab (xmax - xmin,
> +    max_num_spans = xmax - xmin - 1;
> +
> +    if (max_num_spans>  ARRAY_LENGTH(converter->spans_embedded)) {
> +	converter->spans = _cairo_malloc_ab (max_num_spans,
>   					     sizeof (cairo_half_open_span_t));
>   	if (unlikely (converter->spans == NULL))
>   	    return _cairo_error (CAIRO_STATUS_NO_MEMORY);

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