[mapserver-users] Floating point exception agg png

[thomas bonfort]

Daniel,
any chance you can create a ticket for that with a mapfile and sample
data that reproduces it ?
the png vs. jpeg should not intervene as at the point the error is
occuring the code path has been nearly identical (i.e. no png or jpeg
library calls have been made yet).

thomas

On Mon, Mar 21, 2011 at 14:47, Daniel Degasperi
<daniel.degasperi at r3-gis.com> wrote:
> Hi,
> I'v encountered following problem with outputformat png (agg driver):
>
> shp2img -m /data/sites/R3-MTB-Public/sito/etc/goldart/mtb.map -l "ropeway"
> -e 667072.437052 5153904.693426 677867.431220 5164699.687594 -s 1224 1224 -o
> test-mtb.png -all_debug 1 (i got a FPE)
>
> The debugger backtrace gives me:
>
> Program received signal SIGFPE, Arithmetic exception.
> 0x00000000004ba89e in
> mapserver::line_image_pattern<mapserver::pattern_filter_bilinear_rgba<mapserver::rgba8>
>>::pixel (this=0x7fffffffc940, p=0x7fffffffc43c, x=82, y=-757)
>    at renderers/agg/include/agg_renderer_outline_image.h:173
> 173                 m_filter->pixel_high_res(m_buf.rows(),
> (gdb) bt
> #0  0x00000000004ba89e in
> mapserver::line_image_pattern<mapserver::pattern_filter_bilinear_rgba<mapserver::rgba8>
>>::pixel (this=0x7fffffffc940, p=0x7fffffffc43c, x=82, y=-757)
>    at renderers/agg/include/agg_renderer_outline_image.h:173
> #1  0x00000000004ba8fb in
> mapserver::renderer_outline_image<mapserver::renderer_base<mapserver::pixfmt_alpha_blend_rgba<mapserver::blender_rgba_pre<mapserver::rgba8,
> mapserver::order_bgra>, mapserv_row_ptr_cache<int>, int> >,
> mapserver::line_image_pattern<mapserver::pattern_filter_bilinear_rgba<mapserver::rgba8>
>> >::pixel (this=0x7fffffffc9e0, p=0x7fffffffc43c, x=82, y=-757)
>    at renderers/agg/include/agg_renderer_outline_image.h:860
> #2  0x00000000004bafba in
> mapserver::line_interpolator_image<mapserver::renderer_outline_image<mapserver::renderer_base<mapserver::pixfmt_alpha_blend_rgba<mapserver::blender_rgba_pre<mapserver::rgba8,
> mapserver::order_bgra>, mapserv_row_ptr_cache<int>, int> >,
> mapserver::line_image_pattern<mapserver::pattern_filter_bilinear_rgba<mapserver::rgba8>
>> > >::step_hor (this=0x7fffffffc1c0)
>    at renderers/agg/include/agg_renderer_outline_image.h:668
> #3  0x00000000004bb27f in
> mapserver::renderer_outline_image<mapserver::renderer_base<mapserver::pixfmt_alpha_blend_rgba<mapserver::blender_rgba_pre<mapserver::rgba8,
> mapserver::order_bgra>, mapserv_row_ptr_cache<int>, int> >,
> mapserver::line_image_pattern<mapserver::pattern_filter_bilinear_rgba<mapserver::rgba8>
>> >::line3_no_clip (this=0x7fffffffc9e0, lp=..., sx=105681, sy=155778,
> ex=101946, ey=147898)
>    at renderers/agg/include/agg_renderer_outline_image.h:931
> #4  0x00000000004c99f9 in
> mapserver::renderer_outline_image<mapserver::renderer_base<mapserver::pixfmt_alpha_blend_rgba<mapserver::blender_rgba_pre<mapserver::rgba8,
> mapserver::order_bgra>, mapserv_row_ptr_cache<int>, int> >,
> mapserver::line_image_pattern<mapserver::pattern_filter_bilinear_rgba<mapserver::rgba8>
>> >::line3 (this=0x7fffffffc9e0, lp=..., sx=105681, sy=155778, ex=101946,
> ey=147898)
>    at renderers/agg/include/agg_renderer_outline_image.h:992
> #5  0x00000000004cc5b9 in
> mapserver::rasterizer_outline_aa<mapserver::renderer_outline_image<mapserver::renderer_base<mapserver::pixfmt_alpha_blend_rgba<mapserver::blender_rgba_pre<mapserver::rgba8,
> mapserver::order_bgra>, mapserv_row_ptr_cache<int>, int> >,
> mapserver::line_image_pattern<mapserver::pattern_filter_bilinear_rgba<mapserver::rgba8>
>> >, mapserver::line_coord_sat>::render (this=0x7fffffffc9a0,
>    close_polygon=false) at
> renderers/agg/include/agg_rasterizer_outline_aa.h:540
> #6  0x00000000004cc9b5 in
> mapserver::rasterizer_outline_aa<mapserver::renderer_outline_image<mapserver::renderer_base<mapserver::pixfmt_alpha_blend_rgba<mapserver::blender_rgba_pre<mapserver::rgba8,
> mapserver::order_bgra>, mapserv_row_ptr_cache<int>, int> >,
> mapserver::line_image_pattern<mapserver::pattern_filter_bilinear_rgba<mapserver::rgba8>
>> >, mapserver::line_coord_sat>::add_path<line_adaptor> (
>    this=0x7fffffffc9a0, vs=..., path_id=0) at
> renderers/agg/include/agg_rasterizer_outline_aa.h:177
> #7  0x00000000004cca3f in
> AGGMapserverRenderer::renderPathPixmapBGRA<line_adaptor> (this=0xf74350,
> line=..., pattern=...) at mapagg.cpp:392
> #8  0x00000000004cccea in
> AGGMapserverRenderer::renderPolylineVectorSymbol<line_adaptor,
> mapserver::conv_stroke<mapserver::path_base<mapserver::vertex_block_storage<double,
> 8u, 256u> >, mapserver::null_markers> > (this=0xf74350, shape=...,
> symbol=..., tilewidth=0, tileheight=5, color=..., backgroundcolor=...) at
> mapagg.cpp:370
> #9  0x00000000004a9b21 in msDrawLineSymbolAGG(._98 *, ._105 *, ._39 *, ._91
> *, double) (symbolset=0x822ae0, image=0x937b30, p=0x7fffffffd310,
> style=0x87e230, scalefactor=1.3333333333333333)
>    at mapagg.cpp:1723
> #10 0x000000000053d573 in msDrawLineSymbol (symbolset=0x822ae0,
> image=0x937b30, p=0x7fffffffd310, style=0x87e230,
> scalefactor=1.3333333333333333) at maprendering.c:488
> #11 0x0000000000485521 in msDrawShape (map=0x822ab0, layer=0x87c820,
> shape=0x7fffffffd310, image=0x937b30, style=0, querymapMode=0) at
> mapdraw.c:1962
> #12 0x000000000047fe20 in msDrawVectorLayer (map=0x822ab0, layer=0x87c820,
> image=0x937b30) at mapdraw.c:1032
> #13 0x000000000047f32e in msDrawLayer (map=0x822ab0, layer=0x87c820,
> image=0x937b30) at mapdraw.c:822
> #14 0x000000000047e1e5 in msDrawMap (map=0x822ab0, querymap=0) at
> mapdraw.c:468
> #15 0x0000000000440b32 in main (argc=17, argv=0x7fffffffd848) at
> shp2img.c:292
>
> When I switch to outputformat jpeg (agg driver) everything is fine.
>
> MapServer is 5.6.6 on 64bit CentOS 5.5
>
> Best regards,
> Daniel
>
> --
> Daniel Degasperi R3 GIS Srl - GmbH www.r3-gis.com
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