| Andreas Boll | ecd5c7c | 2012-06-12 09:05:03 +0200 | [diff] [blame^] | 1 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| 2 | <html lang="en"> |
| 3 | <head> |
| 4 | <meta http-equiv="content-type" content="text/html; charset=utf-8"> |
| 5 | <title>Debugging Tips</title> |
| 6 | <link rel="stylesheet" type="text/css" href="mesa.css"> |
| 7 | </head> |
| 8 | <body> |
| Brian Paul | 0b27ace | 2003-03-08 17:38:57 +0000 | [diff] [blame] | 9 | |
| Andreas Boll | ecd5c7c | 2012-06-12 09:05:03 +0200 | [diff] [blame^] | 10 | <h1>Debugging Tips</h1> |
| Brian Paul | 0b27ace | 2003-03-08 17:38:57 +0000 | [diff] [blame] | 11 | |
| 12 | <p> |
| 13 | Normally Mesa (and OpenGL) records but does not notify the user of |
| 14 | errors. It is up to the application to call |
| 15 | <code>glGetError</code> to check for errors. Mesa supports an |
| 16 | environment variable, MESA_DEBUG, to help with debugging. If |
| 17 | MESA_DEBUG is defined, a message will be printed to stdout whenever |
| 18 | an error occurs. |
| 19 | </p> |
| 20 | |
| 21 | <p> |
| 22 | More extensive error checking is done when Mesa is compiled with the |
| 23 | DEBUG symbol defined. You'll have to edit the Make-config file and |
| 24 | add -DDEBUG to the CFLAGS line for your system configuration. You may |
| 25 | also want to replace any optimization flags with the -g flag so you can |
| 26 | use your debugger. After you've edited Make-config type 'make clean' |
| 27 | before recompiling. |
| 28 | </p> |
| 29 | <p> |
| 30 | In your debugger you can set a breakpoint in _mesa_error() to trap Mesa |
| 31 | errors. |
| 32 | </p> |
| 33 | <p> |
| 34 | There is a display list printing/debugging facility. See the end of |
| 35 | src/dlist.c for details. |
| 36 | </p> |
| 37 | |
| Andreas Boll | ecd5c7c | 2012-06-12 09:05:03 +0200 | [diff] [blame^] | 38 | </body> |
| 39 | </html> |