GPencil: Allow import several SVG at time

For SVG is very convenient to be able to import several SVG in one operation. Each SVG is imported as a new Grease Pencil object.

Also, now the SVG file name is used as Object name.

Important: As all SVG imported are converted to Grease Pencil object in the same location of the 3D cursor, the SVG imported are not moved and the result may require a manual fix of location. The same is applied for depth order, the files are imported in alphabetic order according to the File list.

Reviewed By: mendio, pepeland

Differential Revision: https://developer.blender.org/D14865

3 files changed, 49 insertions, 15 deletions

diff --git a/source/blender/editors/io/io_gpencil_import.c b/source/blender/editors/io/io_gpencil_import.c
index 9ac64407dcf..b6fecfaf94e 100644
--- a/source/blender/editors/io/io_gpencil_import.c
+++ b/source/blender/editors/io/io_gpencil_import.c
@@ -9,6 +9,8 @@
 
 #  include "BLI_path_util.h"
 
+#  include "MEM_guardedalloc.h"
+
 #  include "DNA_gpencil_types.h"
 #  include "DNA_space_types.h"
 
@@ -63,7 +65,8 @@ static int wm_gpencil_import_svg_exec(bContext *C, wmOperator *op)
 {
   Scene *scene = CTX_data_scene(C);
 
-  if (!RNA_struct_property_is_set(op->ptr, "filepath")) {
+  if (!RNA_struct_property_is_set(op->ptr, "filepath") ||
+      !(RNA_struct_find_property(op->ptr, "directory"))) {
     BKE_report(op->reports, RPT_ERROR, "No filename given");
     return OPERATOR_CANCELLED;
   }
@@ -75,9 +78,6 @@ static int wm_gpencil_import_svg_exec(bContext *C, wmOperator *op)
   }
   View3D *v3d = get_invoke_view3d(C);
 
-  char filename[FILE_MAX];
-  RNA_string_get(op->ptr, "filepath", filename);
-
   /* Set flags. */
   int flag = 0;
 
@@ -101,13 +101,31 @@ static int wm_gpencil_import_svg_exec(bContext *C, wmOperator *op)
       .resolution = resolution,
   };
 
-  /* Do Import. */
-  WM_cursor_wait(1);
-  const bool done = gpencil_io_import(filename, &params);
-  WM_cursor_wait(0);
-
-  if (!done) {
-    BKE_report(op->reports, RPT_WARNING, "Unable to import SVG");
+  /* Loop all selected files to import them. All SVG imported shared the same import
+   * parameters, but they are created in separated grease pencil objects. */
+  PropertyRNA *prop;
+  if ((prop = RNA_struct_find_property(op->ptr, "directory"))) {
+    char *directory = RNA_string_get_alloc(op->ptr, "directory", NULL, 0, NULL);
+
+    if ((prop = RNA_struct_find_property(op->ptr, "files"))) {
+      char file_path[FILE_MAX];
+      RNA_PROP_BEGIN (op->ptr, itemptr, prop) {
+        char *filename = RNA_string_get_alloc(&itemptr, "name", NULL, 0, NULL);
+        BLI_join_dirfile(file_path, sizeof(file_path), directory, filename);
+        MEM_freeN(filename);
+
+        /* Do Import. */
+        WM_cursor_wait(1);
+        RNA_string_get(&itemptr, "name", params.filename);
+        const bool done = gpencil_io_import(file_path, &params);
+        WM_cursor_wait(0);
+        if (!done) {
+          BKE_reportf(op->reports, RPT_WARNING, "Unable to import '%s'", file_path);
+        }
+      }
+      RNA_PROP_END;
+    }
+    MEM_freeN(directory);
   }
 
   return OPERATOR_FINISHED;
@@ -149,10 +167,11 @@ void WM_OT_gpencil_import_svg(wmOperatorType *ot)
   ot->check = wm_gpencil_import_svg_common_check;
 
   WM_operator_properties_filesel(ot,
-                                 FILE_TYPE_OBJECT_IO,
+                                 FILE_TYPE_FOLDER | FILE_TYPE_OBJECT_IO,
                                  FILE_BLENDER,
                                  FILE_OPENFILE,
-                                 WM_FILESEL_FILEPATH | WM_FILESEL_RELPATH | WM_FILESEL_SHOW_PROPS,
+                                 WM_FILESEL_FILEPATH | WM_FILESEL_RELPATH | WM_FILESEL_SHOW_PROPS |
+                                     WM_FILESEL_DIRECTORY | WM_FILESEL_FILES,
                                  FILE_DEFAULTDISPLAY,
                                  FILE_SORT_DEFAULT);
 
diff --git a/source/blender/io/gpencil/gpencil_io.h b/source/blender/io/gpencil/gpencil_io.h
index 215891e3e48..eb811fa2de8 100644
--- a/source/blender/io/gpencil/gpencil_io.h
+++ b/source/blender/io/gpencil/gpencil_io.h
@@ -35,6 +35,8 @@ typedef struct GpencilIOParams {
   /** Stroke sampling factor. */
   float stroke_sample;
   int32_t resolution;
+  /** Filename to be used in new objects. */
+  char filename[128];
 } GpencilIOParams;
 
 /* GpencilIOParams->flag. */
diff --git a/source/blender/io/gpencil/intern/gpencil_io_import_base.cc b/source/blender/io/gpencil/intern/gpencil_io_import_base.cc
index 9b00fbaa027..18cbbceda0b 100644
--- a/source/blender/io/gpencil/intern/gpencil_io_import_base.cc
+++ b/source/blender/io/gpencil/intern/gpencil_io_import_base.cc
@@ -14,6 +14,7 @@
 #include "BKE_material.h"
 
 #include "ED_gpencil.h"
+#include "ED_object.h"
 
 #include "gpencil_io_import_base.hh"
 
@@ -27,10 +28,22 @@ GpencilImporter::GpencilImporter(const GpencilIOParams *iparams) : GpencilIO(ipa
 
 Object *GpencilImporter::create_object()
 {
-  const float *cur = scene_->cursor.location;
+  const float *cur_loc = scene_->cursor.location;
+  const float rot[3] = {0.0f};
   ushort local_view_bits = (params_.v3d && params_.v3d->localvd) ? params_.v3d->local_view_uuid :
                                                                    (ushort)0;
-  Object *ob_gpencil = ED_gpencil_add_object(params_.C, cur, local_view_bits);
+
+  Object *ob_gpencil = ED_object_add_type(params_.C,
+                                          OB_GPENCIL,
+                                          (params_.filename != nullptr) ? params_.filename :
+                                                                          nullptr,
+                                          cur_loc,
+                                          rot,
+                                          false,
+                                          local_view_bits);
+
+  /* Set object defaults. */
+  ED_gpencil_add_defaults(params_.C, ob_gpencil);
 
   return ob_gpencil;
 }