Fix T59773: Raise exception if the gpu module is used in backgound mode.

Instead of crashing, an error message is displayed if a function of the gpu module is called without a GPU context.

Reviewers: brecht, campbellbarton, JacquesLucke, mont29

Subscribers: abdelmatinboulbayam, amir.shehata

Differential Revision: https://developer.blender.org/D4143

2 files changed, 7 insertions, 1 deletions

diff --git a/source/blender/gpu/GPU_init_exit.h b/source/blender/gpu/GPU_init_exit.h
index e89c970b7d9..8f1a42c8795 100644
--- a/source/blender/gpu/GPU_init_exit.h
+++ b/source/blender/gpu/GPU_init_exit.h
@@ -38,6 +38,7 @@ extern "C" {
 
 void GPU_init(void);
 void GPU_exit(void);
+bool GPU_is_initialized(void);
 
 #ifdef __cplusplus
 }
diff --git a/source/blender/gpu/intern/gpu_init_exit.c b/source/blender/gpu/intern/gpu_init_exit.c
index 55d0466c929..d21acb188d9 100644
--- a/source/blender/gpu/intern/gpu_init_exit.c
+++ b/source/blender/gpu/intern/gpu_init_exit.c
@@ -73,7 +73,6 @@ void GPU_init(void)
 }
 
 
-
 void GPU_exit(void)
 {
 	if (!G.background) {
@@ -92,3 +91,9 @@ void GPU_exit(void)
 
 	initialized = false;
 }
+
+
+bool GPU_is_initialized(void)
+{
+	return initialized;
+}