Move background images into the camera

This moves background images out of the 3D viewport,
to be used only as camera reference images.

For 3D viewport references,
background images can be used, see: D2827

Some work is still needed
(background option isn't working at the moment).

1 files changed, 60 insertions, 2 deletions

diff --git a/source/blender/blenkernel/intern/camera.c b/source/blender/blenkernel/intern/camera.c
index 97bb679f8b0..ac004e58785 100644
--- a/source/blender/blenkernel/intern/camera.c
+++ b/source/blender/blenkernel/intern/camera.c
@@ -40,6 +40,7 @@
 #include "DNA_ID.h"
 
 #include "BLI_math.h"
+#include "BLI_listbase.h"
 #include "BLI_rect.h"
 #include "BLI_string.h"
 #include "BLI_utildefines.h"
@@ -55,6 +56,8 @@
 #include "BKE_scene.h"
 #include "BKE_screen.h"
 
+#include "MEM_guardedalloc.h"
+
 #include "GPU_compositing.h"
 
 /****************************** Camera Datablock *****************************/
@@ -101,9 +104,19 @@ void *BKE_camera_add(Main *bmain, const char *name)
  *
  * \param flag  Copying options (see BKE_library.h's LIB_ID_COPY_... flags for more).
  */
-void BKE_camera_copy_data(Main *UNUSED(bmain), Camera *UNUSED(cam_dst), const Camera *UNUSED(cam_src), const int UNUSED(flag))
+void BKE_camera_copy_data(Main *UNUSED(bmain), Camera *cam_dst, const Camera *cam_src, const int flag)
 {
-	/* Nothing to do! */
+	BLI_duplicatelist(&cam_dst->bg_images, &cam_src->bg_images);
+	if ((flag & LIB_ID_CREATE_NO_USER_REFCOUNT) == 0) {
+		for (CameraBGImage *bgpic = cam_dst->bg_images.first; bgpic; bgpic = bgpic->next) {
+			if (bgpic->source == CAM_BGIMG_SOURCE_IMAGE) {
+				id_us_plus((ID *)bgpic->ima);
+			}
+			else if (bgpic->source == CAM_BGIMG_SOURCE_MOVIE) {
+				id_us_plus((ID *)bgpic->clip);
+			}
+		}
+	}
 }
 
 Camera *BKE_camera_copy(Main *bmain, const Camera *cam)
@@ -121,6 +134,16 @@ void BKE_camera_make_local(Main *bmain, Camera *cam, const bool lib_local)
 /** Free (or release) any data used by this camera (does not free the camera itself). */
 void BKE_camera_free(Camera *ca)
 {
+	for (CameraBGImage *bgpic = ca->bg_images.first; bgpic; bgpic = bgpic->next) {
+		if (bgpic->source == CAM_BGIMG_SOURCE_IMAGE) {
+			id_us_min((ID *)bgpic->ima);
+		}
+		else if (bgpic->source == CAM_BGIMG_SOURCE_MOVIE) {
+			id_us_min((ID *)bgpic->clip);
+		}
+	}
+	BLI_freelistN(&ca->bg_images);
+
 	BKE_animdata_free((ID *)ca, false);
 }
 
@@ -961,3 +984,38 @@ void BKE_camera_to_gpu_dof(struct Object *camera, struct GPUFXSettings *r_fx_set
 		r_fx_settings->dof->focus_distance = BKE_camera_object_dof_distance(camera);
 	}
 }
+
+CameraBGImage *BKE_camera_background_image_new(Camera *cam)
+{
+	CameraBGImage *bgpic = MEM_callocN(sizeof(CameraBGImage), "Background Image");
+
+	bgpic->scale = 1.0f;
+	bgpic->alpha = 0.5f;
+	bgpic->iuser.fie_ima = 2;
+	bgpic->iuser.ok = 1;
+	bgpic->flag |= CAM_BGIMG_FLAG_EXPANDED;
+
+	BLI_addtail(&cam->bg_images, bgpic);
+
+	return bgpic;
+}
+
+void BKE_camera_background_image_remove(Camera *cam, CameraBGImage *bgpic)
+{
+	BLI_remlink(&cam->bg_images, bgpic);
+
+	MEM_freeN(bgpic);
+}
+
+void BKE_camera_background_image_clear(Camera *cam)
+{
+	CameraBGImage *bgpic = cam->bg_images.first;
+
+	while (bgpic) {
+		CameraBGImage *next_bgpic = bgpic->next;
+
+		BKE_camera_background_image_remove(cam, bgpic);
+
+		bgpic = next_bgpic;
+	}
+}
\ No newline at end of file