Hi, Just tried adding in the call to cairo_surface_finish(). It still crashes. Code now as follows: cairo_surface_t *surface; cairo_t *cr; surface = cairo_pdf_surface_create ("hellocairo.pdf" , 504, 648); cr = cairo_create (surface); cairo_set_source_rgb(cr, 0, 0, 0); cairo_select_font_face (cr, "serif", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL); cairo_set_font_size (cr, 40.0); cairo_move_to(cr, 10.0, 50.0); cairo_show_text(cr, "Hello, Cairo!"); //drawDashLine(cr); cairo_show_page(cr); cairo_surface_finish(surface); cairo_surface_destroy(surface); cairo_destroy(cr); Stack trace: ntdll.dll!7c90120e() [Frames below may be incorrect and/or missing, no symbols loaded for ntdll.dll] ntdll.dll!7c96e139() ntdll.dll!7c96e576() ntdll.dll!7c9622e8() kernel32.dll!7c85f9a7() msvcr80d.dll!_CrtIsValidHeapPointer(const void * pUserData=0x00955c48) Line 2072 C++ msvcr80d.dll!_free_dbg_nolock(void * pUserData=0x00955c48, int nBlockUse=1) Line 1279 + 0x9 bytes C++ msvcr80d.dll!_free_dbg(void * pUserData=0x00955c48, int nBlockUse=1) Line 1220 + 0xd bytes C++ msvcr80d.dll!free(void * pUserData=0x00955c48) Line 1178 + 0xb bytes C++ libcairod.dll!_cairo_truetype_subset_fini(_cairo_truetype_subset * subset=0x0012f4c0) Line 1171 + 0xe bytes C libcairod.dll!_cairo_pdf_surface_emit_truetype_font_subset(_cairo_pdf_surface * surface=0x00436fe0, _cairo_scaled_font_subset * font_subset=0x0012f75c) Line 3451 + 0xc bytes C libcairod.dll!_cairo_pdf_surface_emit_unscaled_font_subset(_cairo_scaled_font_subset * font_subset=0x0012f75c, void * closure=0x00436fe0) Line 3722 + 0xd bytes C libcairod.dll!_cairo_sub_font_collect(void * entry=0x0043af78, void * closure=0x0012f8a8) Line 578 + 0x15 bytes C libcairod.dll!_cairo_scaled_font_subsets_foreach_internal(_cairo_scaled_font_subsets * font_subsets=0x004386b8, _cairo_status (_cairo_scaled_font_subset *, void *)* font_subset_callback=0x100b67a0, void * closure=0x00436fe0, cairo_subsets_foreach_type_t type=CAIRO_SUBSETS_FOREACH_UNSCALED) Line 889 + 0xd bytes C libcairod.dll!_cairo_scaled_font_subsets_foreach_unscaled(_cairo_scaled_font_subsets * font_subsets=0x004386b8, _cairo_status (_cairo_scaled_font_subset *, void *)* font_subset_callback=0x100b67a0, void * closure=0x00436fe0) Line 918 + 0x13 bytes C libcairod.dll!_cairo_pdf_surface_emit_font_subsets(_cairo_pdf_surface * surface=0x00436fe0) Line 3774 + 0x18 bytes C libcairod.dll!_cairo_pdf_surface_finish(void * abstract_surface=0x00436fe0) Line 1195 + 0x9 bytes C libcairod.dll!cairo_surface_finish(_cairo_surface * surface=0x00436fe0) Line 530 + 0x10 bytes C libcairod.dll!_cairo_paginated_surface_finish(void * abstract_surface=0x00433998) Line 172 + 0xf bytes C libcairod.dll!cairo_surface_finish(_cairo_surface * surface=0x00433998) Line 530 + 0x10 bytes C > hellocairo.exe!main(int argc=2, char * * argv=0x00436f58) Line 48 + 0xc bytes C hellocairo.exe!__tmainCRTStartup() Line 597 + 0x19 bytes C hellocairo.exe!mainCRTStartup() Line 414 C kernel32.dll!7c817077() Thanks <div class="gmail_quote">2009/4/24 Behdad Esfahbod <<a href="mailto:behdad@behdad.org">behdad@behdad.org</a>> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="im">On 04/24/2009 11:59 AM, Gerdus van Zyl wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Try reversing the lines: cairo_surface_destroy(surface); cairo_destroy(cr); destroying the surface before the context looks suspect. and when working with PDF you might want a cairo_surface_finish before destroying. </blockquote> </div> The context has a reference to the surface. And _finish should be called automatically *if* the last reference to the surface is dropped. So, calling it would be a good test to see if that's the problem. behdad<div><div></div><div class="h5"> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> On Fri, Apr 24, 2009 at 4:17 PM, Darren Gallagher<<a href="mailto:dazzag@gmail.com" target="_blank">dazzag@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Using 1.8.6 on windows (with pixman 0.15.2). Built using instructions here: <a href="http://www.williamcyap.com/software/cairo-lib/compiling-cairo-for-windows.xhtml" target="_blank">http://www.williamcyap.com/software/cairo-lib/compiling-cairo-for-windows.xhtml</a> produces a crash witin cairo_destroy() somewhere. The code is as follows: #include<cairo.h> #include<cairo-pdf.h> int main (int argc, char *argv[]) { cairo_surface_t *surface; cairo_t *cr; surface = cairo_pdf_surface_create ("hellocairo.pdf" , 504, 648); cr = cairo_create (surface); cairo_set_source_rgb(cr, 0, 0, 0); cairo_select_font_face (cr, "serif", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL); cairo_set_font_size (cr, 40.0); cairo_move_to(cr, 10.0, 50.0); cairo_show_text(cr, "Hello, Cairo!"); cairo_show_page(cr); cairo_surface_destroy(surface); cairo_destroy(cr); return 0; } the stack is as follows: ntdll.dll!7c90120e() [Frames below may be incorrect and/or missing, no symbols loaded for ntdll.dll] ntdll.dll!7c96c201() ntdll.dll!7c96c63e() ntdll.dll!7c9603b0() kernel32.dll!7c85f8d7() msvcr80d.dll!_CrtIsValidHeapPointer(const void * pUserData=0x00955c50) Line 2072 C++ msvcr80d.dll!_free_dbg_nolock(void * pUserData=0x00955c50, int nBlockUse=1) Line 1279 + 0x9 bytes C++ msvcr80d.dll!_free_dbg(void * pUserData=0x00955c50, int nBlockUse=1) Line 1220 + 0xd bytes C++ msvcr80d.dll!free(void * pUserData=0x00955c50) Line 1178 + 0xb bytes C++ libcairod.dll!_cairo_truetype_subset_fini(_cairo_truetype_subset * subset=0x0012f22c) Line 1171 + 0xe bytes C libcairod.dll!_cairo_pdf_surface_emit_truetype_font_subset(_cairo_pdf_surface * surface=0x00436fe0, _cairo_scaled_font_subset * font_subset=0x0012f4c8) Line 3451 + 0xc bytes C libcairod.dll!_cairo_pdf_surface_emit_unscaled_font_subset(_cairo_scaled_font_subset * font_subset=0x0012f4c8, void * closure=0x00436fe0) Line 3722 + 0xd bytes C libcairod.dll!_cairo_sub_font_collect(void * entry=0x0043af78, void * closure=0x0012f614) Line 578 + 0x15 bytes C libcairod.dll!_cairo_scaled_font_subsets_foreach_internal(_cairo_scaled_font_subsets * font_subsets=0x004386b8, _cairo_status (_cairo_scaled_font_subset *, void *)* font_subset_callback=0x100b67a0, void * closure=0x00436fe0, cairo_subsets_foreach_type_t type=CAIRO_SUBSETS_FOREACH_UNSCALED) Line 889 + 0xd bytes C libcairod.dll!_cairo_scaled_font_subsets_foreach_unscaled(_cairo_scaled_font_subsets * font_subsets=0x004386b8, _cairo_status (_cairo_scaled_font_subset *, void *)* font_subset_callback=0x100b67a0, void * closure=0x00436fe0) Line 918 + 0x13 bytes C libcairod.dll!_cairo_pdf_surface_emit_font_subsets(_cairo_pdf_surface * surface=0x00436fe0) Line 3774 + 0x18 bytes C libcairod.dll!_cairo_pdf_surface_finish(void * abstract_surface=0x00436fe0) Line 1195 + 0x9 bytes C libcairod.dll!cairo_surface_finish(_cairo_surface * surface=0x00436fe0) Line 530 + 0x10 bytes C libcairod.dll!_cairo_paginated_surface_finish(void * abstract_surface=0x00433998) Line 172 + 0xf bytes C libcairod.dll!cairo_surface_finish(_cairo_surface * surface=0x00433998) Line 530 + 0x10 bytes C libcairod.dll!cairo_surface_destroy(_cairo_surface * surface=0x00433998) Line 435 + 0x9 bytes C libcairod.dll!_cairo_gstate_fini(_cairo_gstate * gstate=0x00438a30) Line 205 + 0xf bytes C libcairod.dll!cairo_destroy(_cairo * cr=0x00438a10) Line 228 + 0xc bytes C <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> hellocairo.exe!main(int argc=2, char * * argv=0x00436f58) Line 49 + 0xc bytes C </blockquote> hellocairo.exe!__tmainCRTStartup() Line 597 + 0x19 bytes C hellocairo.exe!mainCRTStartup() Line 414 C kernel32.dll!7c817067() Any help appreciated. Thanks Daz _______________________________________________ cairo mailing list <a href="mailto:cairo@cairographics.org" target="_blank">cairo@cairographics.org</a> <a href="http://lists.cairographics.org/mailman/listinfo/cairo" target="_blank">http://lists.cairographics.org/mailman/listinfo/cairo</a> </blockquote> _______________________________________________ cairo mailing list <a href="mailto:cairo@cairographics.org" target="_blank">cairo@cairographics.org</a> <a href="http://lists.cairographics.org/mailman/listinfo/cairo" target="_blank">http://lists.cairographics.org/mailman/listinfo/cairo</a> </blockquote> </div></div></blockquote></div>