BLF: initial word-wrap support

- Adds support for word wrapping to Blender's BLF font library.
- Splits lines when width limit is reached or on explicit \n newlines.

Details:

- Word wrapping is used when `BLF_WORD_WRAP` flag is enabled.
- There is a single loop to handle line wrapping,
  this runs callback, passing in a substring,
  this way we can avoid code-duplication for all word-wrapped
  versions of functions... OR... avoid having to add support
  for word-wrapping directly into each function.
- The `ResultBLF` struct was added to be able to get the number
  of wrapped lines, when calling otherwise unrelated functions
  such as `BLF_draw/BLF_width/BLF_boundbox`,
  which can be passed as the last argument to `BLF_*_ex()` functions.
- The `ResultBLF` struct is used to store the result of drawing
  (currently only the number of lines wrapped, and the width).

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/blenkernel/intern/seqeffects.c b/source/blender/blenkernel/intern/seqeffects.c
index c65ed527568..3e93fb53bfc 100644
--- a/source/blender/blenkernel/intern/seqeffects.c
+++ b/source/blender/blenkernel/intern/seqeffects.c
@@ -2968,11 +2968,11 @@ static ImBuf *do_text_effect(const SeqRenderData *context, Sequence *seq, float
 		fonty = BLF_height_max(mono);
 		BLF_position(mono, x + max_ii(fontx / 25, 1), y + max_ii(fonty / 25, 1), 0.0f);
 		BLF_buffer_col(mono, 0.0f, 0.0f, 0.0f, 1.0f);
-		BLF_draw_buffer(mono, data->text);
+		BLF_draw_buffer(mono, data->text, BLF_DRAW_STR_DUMMY_MAX);
 	}
 	BLF_position(mono, x, y, 0.0f);
 	BLF_buffer_col(mono, 1.0f, 1.0f, 1.0f, 1.0f);
-	BLF_draw_buffer(mono, data->text);
+	BLF_draw_buffer(mono, data->text, BLF_DRAW_STR_DUMMY_MAX);
 
 	BLF_buffer(mono, NULL, NULL, 0, 0, 0, NULL);