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Author Topic: xRender  (Read 2563 times)

PaulBird

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xRender
« on: August 17, 2011, 01:27:05 pm »
 hey, so i was wondering how to make programs using this on the iPhone? all you have to do is a #include <X11/extensions/xrender.h> and then use its functions to render objects and display images on screen (exciting right?!!) in the x11 interface. so my real question is to Boo or whoever ported this or has ANY info on this is how can we use this header? i always get errors (for every function that i use that came from xrender.h) saying that the function was not declared. PLEASE help me, this could be really cool.
thnx :D
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C0deH4cker

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Re: xRender
« Reply #1 on: August 17, 2011, 06:11:10 pm »
you have to link your program with the x libraries.
also, it should be #include <X11/extensions/Xrender.h>.

gcc -lXrender myXprogram.c
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PaulBird

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Re: xRender
« Reply #2 on: August 18, 2011, 07:30:47 pm »
I do that and i get this every time:[/User]: gcc -lXrender c.c
Undefined symbols:
  "_XOpenDisplay", referenced from:
      _init in cc4SEYk6.o
  "_XFlush", referenced from:
      _main in cc4SEYk6.o
  "_XFreePixmap", referenced from:
      _create_brush in cc4SEYk6.o
  "_XCreatePixmap", referenced from:
      _create_brush in cc4SEYk6.o
      _init in cc4SEYk6.o
  "_XSetWindowBackgroundPixmap", referenced from:
      _init in cc4SEYk6.o
  "_XCreateWindow", referenced from:
      _init in cc4SEYk6.o
  "_XClearArea", referenced from:
      _main in cc4SEYk6.o
  "_XSelectInput", referenced from:
      _init in cc4SEYk6.o
  "_XMapWindow", referenced from:
      _init in cc4SEYk6.o
  "_XNextEvent", referenced from:
      _init in cc4SEYk6.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
[/User]:
. Plzzz help, ill give whoever can get this rendering working a $10 itunes gift card code. Lol no jk, plz help.
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PaulBird

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Re: xRender
« Reply #3 on: August 18, 2011, 07:31:54 pm »
All of those undefined symbols are functions just btw ...
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Re: xRender
« Reply #4 on: August 18, 2011, 09:48:14 pm »
gcc -lXrender -lX11 -o output input.c
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PaulBird

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Re: xRender
« Reply #5 on: August 19, 2011, 08:31:49 am »
sweet :) it compilied
but i get bus error: 10 when i try running it.. :(
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h4ck3rpr0n3

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Re: xRender
« Reply #6 on: August 19, 2011, 08:32:34 am »
what was before error 10? dis it just say error 10?
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Re: xRender
« Reply #7 on: August 19, 2011, 11:17:19 am »
Just 10.
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PaulBird

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Re: xRender
« Reply #8 on: August 19, 2011, 03:15:27 pm »
yup... any suggestionsss?
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Re: xRender
« Reply #9 on: August 19, 2011, 03:47:33 pm »
I honestly dont know how to fix that error. It seems to happen at random for like one or two programs. It used to happen for me with perl before i uninstalled gcc from our repo. Now its happening to me if i try to run clrwrap (part of portable.net) even though it used to work perfectly.
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PaulBird

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Re: xRender
« Reply #10 on: August 19, 2011, 06:43:49 pm »
sigh :|
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Re: xRender
« Reply #11 on: August 20, 2011, 11:05:22 pm »
soory, i would take a look but i've been cursed with a boot loop
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PaulBird

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Re: xRender
« Reply #12 on: August 21, 2011, 07:03:07 pm »
ru tethered?
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h4ck3rpr0n3

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Re: xRender
« Reply #13 on: August 21, 2011, 09:16:19 pm »
nope haha
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Re: xRender
« Reply #14 on: August 21, 2011, 10:00:57 pm »
I ran clrwrap through gdb. Found out that ilrun (also a part of portable .net) was the problem. Here are some instructions before/after the bus error:

Before:

0x3a50b6:       lsls    r0, r0, #0
0x3a50b8:       andeq   r0, r0, r0
0x3a50bc:       andeq   r0, r0, r0


Error line:

0x3a50c0:       mov     r0, #3670016    ; 0x380000


After:

0x3a50c4:       add     r0, r0, #64768  ; 0xfd00
0x3a50c8:       add     r0, r0, #16     ; 0x10
0x3a50cc:       str     r0, [r5]
0x3a50d0:       add     r5, r5, #4      ; 0x4
0x3a50d4:       ldr     r4, [pc, #0]
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