C Logging: use instead of printf for messages

- See `--log` help message for usage.
- Supports enabling categories.
- Color severity.
- Optionally logs to a file.
- Currently use to replace printf calls in wm module.

See D3120 for details.

3 files changed, 14 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_global.h b/source/blender/blenkernel/BKE_global.h
index 832b4164613..ce8de456697 100644
--- a/source/blender/blenkernel/BKE_global.h
+++ b/source/blender/blenkernel/BKE_global.h
@@ -80,6 +80,13 @@ typedef struct Global {
 	 * however this is now only used for runtime options */
 	int f;
 
+	struct {
+		/* Logging vars (different loggers may use). */
+		int level;
+		/* FILE handle or use stderr (we own this so close when done). */
+		void *file;
+	} log;
+
 	/* debug flag, G_DEBUG, G_DEBUG_PYTHON & friends, set python or command line args */
 	int debug;
 
diff --git a/source/blender/blenkernel/CMakeLists.txt b/source/blender/blenkernel/CMakeLists.txt
index 231810aee31..25954f277b8 100644
--- a/source/blender/blenkernel/CMakeLists.txt
+++ b/source/blender/blenkernel/CMakeLists.txt
@@ -48,6 +48,7 @@ set(INC
 	../../../intern/mikktspace
 	../../../intern/smoke/extern
 	../../../intern/atomic
+	../../../intern/clog
 	../../../intern/libmv
 	../../../extern/curve_fit_nd
 )
diff --git a/source/blender/blenkernel/intern/blender.c b/source/blender/blenkernel/intern/blender.c
index a27f075a346..55b2d5b9c0d 100644
--- a/source/blender/blenkernel/intern/blender.c
+++ b/source/blender/blenkernel/intern/blender.c
@@ -83,6 +83,10 @@ void BKE_blender_free(void)
 	BKE_main_free(G.main);
 	G.main = NULL;
 
+	if (G.log.file != NULL) {
+		fclose(G.log.file);
+	}
+
 	BKE_spacetypes_free();      /* after free main, it uses space callbacks */
 	
 	IMB_exit();
@@ -130,6 +134,8 @@ void BKE_blender_globals_init(void)
 #else
 	G.f &= ~G_SCRIPT_AUTOEXEC;
 #endif
+
+	G.log.level = 1;
 }
 
 void BKE_blender_globals_clear(void)