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Make jpeg loading errors non-fatal.

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This commit is contained in:
SmileTheory 2015-12-20 03:08:50 -08:00
parent f78d04eba8
commit d8fd07b69a
1 changed files with 35 additions and 8 deletions
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43
code/renderercommon/tr_image_jpg.c
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@ -20,6 +20,8 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=========================================================================== ===========================================================================
*/ */
#include <setjmp.h>
#include "tr_common.h" #include "tr_common.h"
/* /*
@ -42,16 +44,27 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# endif # endif
#endif #endif
static void __attribute__((__noreturn__)) R_JPGErrorExit(j_common_ptr cinfo) /* Catching errors, as done in libjpeg's example.c */
typedef struct q_jpeg_error_mgr_s
{
struct jpeg_error_mgr pub; /* "public" fields */
jmp_buf setjmp_buffer; /* for return to caller */
} q_jpeg_error_mgr_t;
static void R_JPGErrorExit(j_common_ptr cinfo)
{ {
char buffer[JMSG_LENGTH_MAX]; char buffer[JMSG_LENGTH_MAX];
/* cinfo->err really points to a q_jpeg_error_mgr_s struct, so coerce pointer */
q_jpeg_error_mgr_t *jerr = (q_jpeg_error_mgr_t *)cinfo->err;
(*cinfo->err->format_message) (cinfo, buffer); (*cinfo->err->format_message) (cinfo, buffer);
/* Let the memory manager delete any temp files before we die */ ri.Printf(PRINT_ALL, "R_LoadJPG() error: %s", buffer);
jpeg_destroy(cinfo);
/* Return control to the setjmp point */
ri.Error(ERR_FATAL, "%s", buffer); longjmp(jerr->setjmp_buffer, 1);
} }
static void R_JPGOutputMessage(j_common_ptr cinfo) static void R_JPGOutputMessage(j_common_ptr cinfo)
@ -83,7 +96,7 @@ void R_LoadJPG(const char *filename, unsigned char **pic, int *width, int *heigh
* Note that this struct must live as long as the main JPEG parameter * Note that this struct must live as long as the main JPEG parameter
* struct, to avoid dangling-pointer problems. * struct, to avoid dangling-pointer problems.
*/ */
struct jpeg_error_mgr jerr; q_jpeg_error_mgr_t jerr;
/* More stuff */ /* More stuff */
JSAMPARRAY buffer; /* Output row buffer */ JSAMPARRAY buffer; /* Output row buffer */
unsigned int row_stride; /* physical row width in output buffer */ unsigned int row_stride; /* physical row width in output buffer */
@ -115,10 +128,24 @@ void R_LoadJPG(const char *filename, unsigned char **pic, int *width, int *heigh
* This routine fills in the contents of struct jerr, and returns jerr's * This routine fills in the contents of struct jerr, and returns jerr's
* address which we place into the link field in cinfo. * address which we place into the link field in cinfo.
*/ */
cinfo.err = jpeg_std_error(&jerr); cinfo.err = jpeg_std_error(&jerr.pub);
cinfo.err->error_exit = R_JPGErrorExit; cinfo.err->error_exit = R_JPGErrorExit;
cinfo.err->output_message = R_JPGOutputMessage; cinfo.err->output_message = R_JPGOutputMessage;
/* Establish the setjmp return context for R_JPGErrorExit to use. */
if (setjmp(jerr.setjmp_buffer))
{
/* If we get here, the JPEG code has signaled an error.
* We need to clean up the JPEG object, close the input file, and return.
*/
jpeg_destroy_decompress(&cinfo);
ri.FS_FreeFile(fbuffer.v);
/* Append the filename to the error for easier debugging */
ri.Printf(PRINT_ALL, ", file %s\n", filename);
return;
}
/* Now we can initialize the JPEG decompression object. */ /* Now we can initialize the JPEG decompression object. */
jpeg_create_decompress(&cinfo); jpeg_create_decompress(&cinfo);