Blender Font (BLF): add length argument to string width/height functions

This also fixes a crash editing buttons longer then UI_MAX_DRAW_STR

22 files changed, 109 insertions, 131 deletions

diff --git a/source/blender/blenfont/BLF_api.h b/source/blender/blenfont/BLF_api.h
index 8f77f8c984d..b25166f4b18 100644
--- a/source/blender/blenfont/BLF_api.h
+++ b/source/blender/blenfont/BLF_api.h
@@ -82,14 +82,14 @@ int BLF_draw_mono(int fontid, const char *str, size_t len, int cwidth);
 /* This function return the bounding box of the string
  * and are not multiplied by the aspect.
  */
-void BLF_boundbox(int fontid, const char *str, struct rctf *box);
+void BLF_boundbox(int fontid, const char *str, size_t len, struct rctf *box);
 
 /* The next both function return the width and height
  * of the string, using the current font and both value 
  * are multiplied by the aspect of the font.
  */
-float BLF_width(int fontid, const char *str);
-float BLF_height(int fontid, const char *str);
+float BLF_width(int fontid, const char *str, size_t len);
+float BLF_height(int fontid, const char *str, size_t len);
 
 /* Return dimensions of the font without any sample text. */
 float BLF_height_max(int fontid);
@@ -100,7 +100,7 @@ float BLF_ascender(int fontid);
 /* The following function return the width and height of the string, but
  * just in one call, so avoid extra freetype2 stuff.
  */
-void BLF_width_and_height(int fontid, const char *str, float *width, float *height);
+void BLF_width_and_height(int fontid, const char *str, size_t len, float *r_width, float *r_height);
 
 /* For fixed width fonts only, returns the width of a
  * character.
@@ -111,9 +111,9 @@ float BLF_fixed_width(int fontid);
  * of the string, using the default font and both value
  * are multiplied by the aspect of the font.
  */
-void  BLF_width_and_height_default(const char *str, float *width, float *height);
-float BLF_width_default(const char *str);
-float BLF_height_default(const char *str);
+void  BLF_width_and_height_default(const char *str, size_t len, float *r_width, float *r_height);
+float BLF_width_default(const char *str, size_t len);
+float BLF_height_default(const char *str, size_t len);
 
 /* Set rotation for default font. */
 void BLF_rotation_default(float angle);
diff --git a/source/blender/blenfont/intern/blf.c b/source/blender/blenfont/intern/blf.c
index 130eaaecba5..746ee3c0d93 100644
--- a/source/blender/blenfont/intern/blf.c
+++ b/source/blender/blenfont/intern/blf.c
@@ -592,44 +592,44 @@ int BLF_draw_mono(int fontid, const char *str, size_t len, int cwidth)
 	return columns;
 }
 
-void BLF_boundbox(int fontid, const char *str, rctf *box)
+void BLF_boundbox(int fontid, const char *str, size_t len, rctf *box)
 {
 	FontBLF *font = blf_get(fontid);
 
 	if (font) {
-		blf_font_boundbox(font, str, box);
+		blf_font_boundbox(font, str, len, box);
 	}
 }
 
-void BLF_width_and_height(int fontid, const char *str, float *width, float *height)
+void BLF_width_and_height(int fontid, const char *str, size_t len, float *r_width, float *r_height)
 {
 	FontBLF *font = blf_get(fontid);
 
 	if (font && font->glyph_cache) {
-		blf_font_width_and_height(font, str, width, height);
+		blf_font_width_and_height(font, str, len, r_width, r_height);
 	}
 	else {
-		*width = *height = 0.0f;
+		*r_width = *r_height = 0.0f;
 	}
 }
 
-void BLF_width_and_height_default(const char *str, float *width, float *height)
+void BLF_width_and_height_default(const char *str, size_t len, float *r_width, float *r_height)
 {
 	if (!blf_global_font_init()) {
-		*width = *height = 0.0f;
+		*r_width = *r_height = 0.0f;
 		return;
 	}
 
 	BLF_size(global_font_default, global_font_points, global_font_dpi);
-	BLF_width_and_height(global_font_default, str, width, height);
+	BLF_width_and_height(global_font_default, str, len, r_width, r_height);
 }
 
-float BLF_width(int fontid, const char *str)
+float BLF_width(int fontid, const char *str, size_t len)
 {
 	FontBLF *font = blf_get(fontid);
 
 	if (font && font->glyph_cache) {
-		return blf_font_width(font, str);
+		return blf_font_width(font, str, len);
 	}
 
 	return 0.0f;
@@ -646,21 +646,21 @@ float BLF_fixed_width(int fontid)
 	return 0.0f;
 }
 
-float BLF_width_default(const char *str)
+float BLF_width_default(const char *str, size_t len)
 {
 	if (!blf_global_font_init())
 		return 0.0f;
 
 	BLF_size(global_font_default, global_font_points, global_font_dpi);
-	return BLF_width(global_font_default, str);
+	return BLF_width(global_font_default, str, len);
 }
 
-float BLF_height(int fontid, const char *str)
+float BLF_height(int fontid, const char *str, size_t len)
 {
 	FontBLF *font = blf_get(fontid);
 
 	if (font && font->glyph_cache) {
-		return blf_font_height(font, str);
+		return blf_font_height(font, str, len);
 	}
 
 	return 0.0f;
@@ -710,14 +710,14 @@ float BLF_ascender(int fontid)
 	return 0.0f;
 }
 
-float BLF_height_default(const char *str)
+float BLF_height_default(const char *str, size_t len)
 {
 	if (!blf_global_font_init())
 		return 0.0f;
 
 	BLF_size(global_font_default, global_font_points, global_font_dpi);
 
-	return BLF_height(global_font_default, str);
+	return BLF_height(global_font_default, str, len);
 }
 
 void BLF_rotation(int fontid, float angle)
diff --git a/source/blender/blenfont/intern/blf_font.c b/source/blender/blenfont/intern/blf_font.c
index 998b415a6af..40943225223 100644
--- a/source/blender/blenfont/intern/blf_font.c
+++ b/source/blender/blenfont/intern/blf_font.c
@@ -415,7 +415,7 @@ void blf_font_buffer(FontBLF *font, const char *str)
 	}
 }
 
-void blf_font_boundbox(FontBLF *font, const char *str, rctf *box)
+void blf_font_boundbox(FontBLF *font, const char *str, size_t len, rctf *box)
 {
 	unsigned int c;
 	GlyphBLF *g, *g_prev = NULL;
@@ -435,7 +435,7 @@ void blf_font_boundbox(FontBLF *font, const char *str, rctf *box)
 
 	blf_font_ensure_ascii_table(font);
 
-	while (str[i]) {
+	while ((i < len) && str[i]) {
 		BLF_UTF8_NEXT_FAST(font, g, str, i, c, glyph_ascii_table);
 
 		if (c == BLI_UTF8_ERR)
@@ -468,7 +468,7 @@ void blf_font_boundbox(FontBLF *font, const char *str, rctf *box)
 	}
 }
 
-void blf_font_width_and_height(FontBLF *font, const char *str, float *width, float *height)
+void blf_font_width_and_height(FontBLF *font, const char *str, size_t len, float *width, float *height)
 {
 	float xa, ya;
 	rctf box;
@@ -482,12 +482,12 @@ void blf_font_width_and_height(FontBLF *font, const char *str, float *width, flo
 		ya = 1.0f;
 	}
 
-	blf_font_boundbox(font, str, &box);
+	blf_font_boundbox(font, str, len, &box);
 	*width  = (BLI_rctf_size_x(&box) * xa);
 	*height = (BLI_rctf_size_y(&box) * ya);
 }
 
-float blf_font_width(FontBLF *font, const char *str)
+float blf_font_width(FontBLF *font, const char *str, size_t len)
 {
 	float xa;
 	rctf box;
@@ -497,11 +497,11 @@ float blf_font_width(FontBLF *font, const char *str)
 	else
 		xa = 1.0f;
 
-	blf_font_boundbox(font, str, &box);
+	blf_font_boundbox(font, str, len, &box);
 	return BLI_rctf_size_x(&box) * xa;
 }
 
-float blf_font_height(FontBLF *font, const char *str)
+float blf_font_height(FontBLF *font, const char *str, size_t len)
 {
 	float ya;
 	rctf box;
@@ -511,7 +511,7 @@ float blf_font_height(FontBLF *font, const char *str)
 	else
 		ya = 1.0f;
 
-	blf_font_boundbox(font, str, &box);
+	blf_font_boundbox(font, str, len, &box);
 	return BLI_rctf_size_y(&box) * ya;
 }
 
diff --git a/source/blender/blenfont/intern/blf_internal.h b/source/blender/blenfont/intern/blf_internal.h
index 7d4b39dd337..9f6bad9b00d 100644
--- a/source/blender/blenfont/intern/blf_internal.h
+++ b/source/blender/blenfont/intern/blf_internal.h
@@ -55,10 +55,10 @@ void blf_font_draw(struct FontBLF *font, const char *str, size_t len);
 void blf_font_draw_ascii(struct FontBLF *font, const char *str, size_t len);
 int blf_font_draw_mono(struct FontBLF *font, const char *str, size_t len, int cwidth);
 void blf_font_buffer(struct FontBLF *font, const char *str);
-void blf_font_boundbox(struct FontBLF *font, const char *str, struct rctf *box);
-void blf_font_width_and_height(struct FontBLF *font, const char *str, float *width, float *height);
-float blf_font_width(struct FontBLF *font, const char *str);
-float blf_font_height(struct FontBLF *font, const char *str);
+void blf_font_boundbox(struct FontBLF *font, const char *str, size_t len, struct rctf *box);
+void blf_font_width_and_height(struct FontBLF *font, const char *str, size_t len, float *width, float *height);
+float blf_font_width(struct FontBLF *font, const char *str, size_t len);
+float blf_font_height(struct FontBLF *font, const char *str, size_t len);
 float blf_font_fixed_width(struct FontBLF *font);
 void blf_font_free(struct FontBLF *font);
 
diff --git a/source/blender/blenkernel/intern/image.c b/source/blender/blenkernel/intern/image.c
index e4278bae293..d59a23c1c30 100644
--- a/source/blender/blenkernel/intern/image.c
+++ b/source/blender/blenkernel/intern/image.c
@@ -1636,6 +1636,9 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 	/* this could be an argument if we want to operate on non linear float imbuf's
 	 * for now though this is only used for renders which use scene settings */
 
+#define TEXT_SIZE_CHECK(str, w, h) \
+	((str[0]) && ((void)(h = h_fixed), (w = BLF_width(mono, str, sizeof(str)))))
+
 #define BUFF_MARGIN_X 2
 #define BUFF_MARGIN_Y 1
 
@@ -1665,9 +1668,8 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 	x = 0;
 	y = height;
 
-	if (stamp_data.file[0]) {
+	if (TEXT_SIZE_CHECK(stamp_data.file, w, h)) {
 		/* Top left corner */
-		BLF_width_and_height(mono, stamp_data.file, &w, &h); h = h_fixed;
 		y -= h;
 
 		/* also a little of space to the background. */
@@ -1683,8 +1685,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 	}
 
 	/* Top left corner, below File */
-	if (stamp_data.note[0]) {
-		BLF_width_and_height(mono, stamp_data.note, &w, &h); h = h_fixed;
+	if (TEXT_SIZE_CHECK(stamp_data.note, w, h)) {
 		y -= h;
 
 		/* and space for background. */
@@ -1699,8 +1700,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 	}
 
 	/* Top left corner, below File (or Note) */
-	if (stamp_data.date[0]) {
-		BLF_width_and_height(mono, stamp_data.date, &w, &h); h = h_fixed;
+	if (TEXT_SIZE_CHECK(stamp_data.date, w, h)) {
 		y -= h;
 
 		/* and space for background. */
@@ -1715,8 +1715,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 	}
 
 	/* Top left corner, below File, Date or Note */
-	if (stamp_data.rendertime[0]) {
-		BLF_width_and_height(mono, stamp_data.rendertime, &w, &h); h = h_fixed;
+	if (TEXT_SIZE_CHECK(stamp_data.rendertime, w, h)) {
 		y -= h;
 
 		/* and space for background. */
@@ -1731,8 +1730,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 	y = 0;
 
 	/* Bottom left corner, leaving space for timing */
-	if (stamp_data.marker[0]) {
-		BLF_width_and_height(mono, stamp_data.marker, &w, &h); h = h_fixed;
+	if (TEXT_SIZE_CHECK(stamp_data.marker, w, h)) {
 
 		/* extra space for background. */
 		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp,  display,
@@ -1747,8 +1745,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 	}
 
 	/* Left bottom corner */
-	if (stamp_data.time[0]) {
-		BLF_width_and_height(mono, stamp_data.time, &w, &h); h = h_fixed;
+	if (TEXT_SIZE_CHECK(stamp_data.time, w, h)) {
 
 		/* extra space for background */
 		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, display,
@@ -1762,8 +1759,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 		x += w + pad;
 	}
 
-	if (stamp_data.frame[0]) {
-		BLF_width_and_height(mono, stamp_data.frame, &w, &h); h = h_fixed;
+	if (TEXT_SIZE_CHECK(stamp_data.frame, w, h)) {
 
 		/* extra space for background. */
 		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, display,
@@ -1777,8 +1773,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 		x += w + pad;
 	}
 
-	if (stamp_data.camera[0]) {
-		BLF_width_and_height(mono, stamp_data.camera, &w, &h); h = h_fixed;
+	if (TEXT_SIZE_CHECK(stamp_data.camera, w, h)) {
 
 		/* extra space for background. */
 		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, display,
@@ -1790,8 +1785,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 		x += w + pad;
 	}
 
-	if (stamp_data.cameralens[0]) {
-		BLF_width_and_height(mono, stamp_data.cameralens, &w, &h); h = h_fixed;
+	if (TEXT_SIZE_CHECK(stamp_data.cameralens, w, h)) {
 
 		/* extra space for background. */
 		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, display,
@@ -1800,8 +1794,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 		BLF_draw_buffer(mono, stamp_data.cameralens);
 	}
 
-	if (stamp_data.scene[0]) {
-		BLF_width_and_height(mono, stamp_data.scene, &w, &h); h = h_fixed;
+	if (TEXT_SIZE_CHECK(stamp_data.scene, w, h)) {
 
 		/* Bottom right corner, with an extra space because blenfont is too strict! */
 		x = width - w - 2;
@@ -1815,8 +1808,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 		BLF_draw_buffer(mono, stamp_data.scene);
 	}
 
-	if (stamp_data.strip[0]) {
-		BLF_width_and_height(mono, stamp_data.strip, &w, &h); h = h_fixed;
+	if (TEXT_SIZE_CHECK(stamp_data.strip, w, h)) {
 
 		/* Top right corner, with an extra space because blenfont is too strict! */
 		x = width - w - pad;
@@ -1833,6 +1825,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 	/* cleanup the buffer. */
 	BLF_buffer(mono, NULL, NULL, 0, 0, 0, NULL);
 
+#undef TEXT_SIZE_CHECK
 #undef BUFF_MARGIN_X
 #undef BUFF_MARGIN_Y
 }
diff --git a/source/blender/editors/include/UI_interface.h b/source/blender/editors/include/UI_interface.h
index 9d541b56bf4..0300b7bc685 100644
--- a/source/blender/editors/include/UI_interface.h
+++ b/source/blender/editors/include/UI_interface.h
@@ -903,7 +903,7 @@ void uiIDContextProperty(struct bContext *C, struct PointerRNA *ptr, struct Prop
 /* Styled text draw */
 void uiStyleFontSet(struct uiFontStyle *fs);
 void uiStyleFontDrawExt(struct uiFontStyle *fs, const struct rcti *rect, const char *str,
-                        float *r_xofs, float *r_yofs);
+                        size_t len, float *r_xofs, float *r_yofs);
 void uiStyleFontDraw(struct uiFontStyle *fs, struct rcti *rect, const char *str);
 void uiStyleFontDrawRotated(struct uiFontStyle *fs, struct rcti *rect, const char *str);
 
diff --git a/source/blender/editors/interface/interface.c b/source/blender/editors/interface/interface.c
index c82026eace6..46ee1700a06 100644
--- a/source/blender/editors/interface/interface.c
+++ b/source/blender/editors/interface/interface.c
@@ -218,7 +218,7 @@ static void ui_text_bounds_block(uiBlock *block, float offset)
 	
 	for (bt = block->buttons.first; bt; bt = bt->next) {
 		if (bt->type != SEPR) {
-			j = BLF_width(style->widget.uifont_id, bt->drawstr);
+			j = BLF_width(style->widget.uifont_id, bt->drawstr, sizeof(bt->drawstr));
 
 			if (j > i) i = j;
 		}
diff --git a/source/blender/editors/interface/interface_handlers.c b/source/blender/editors/interface/interface_handlers.c
index ee6663d7954..1ed0c128a20 100644
--- a/source/blender/editors/interface/interface_handlers.c
+++ b/source/blender/editors/interface/interface_handlers.c
@@ -1616,8 +1616,7 @@ void ui_button_text_password_hide(char password_str[UI_MAX_DRAW_STR], uiBut *but
 		/* save original string */
 		BLI_strncpy(password_str, but->drawstr, UI_MAX_DRAW_STR);
 
-		for (i = 0; i < len; i++)
-			but->drawstr[i] = '*';
+		memset(but->drawstr, '*', len);
 		but->drawstr[i] = '\0';
 	}
 }
@@ -1656,9 +1655,9 @@ static void ui_textedit_set_cursor_pos(uiBut *but, uiHandleButtonData *data, con
 	ui_button_text_password_hide(password_str, but, FALSE);
 
 	origstr = MEM_mallocN(sizeof(char) * data->maxlen, "ui_textedit origstr");
-	
+
 	BLI_strncpy(origstr, but->drawstr, data->maxlen);
-	
+
 	/* XXX solve generic, see: #widget_draw_text_icon */
 	if (but->type == NUM || but->type == NUMSLI) {
 		startx += (int)(0.5f * (BLI_rctf_size_y(&but->rect)));
@@ -1680,7 +1679,7 @@ static void ui_textedit_set_cursor_pos(uiBut *but, uiHandleButtonData *data, con
 		while (i > 0) {
 			if (BLI_str_cursor_step_prev_utf8(origstr, but->ofs, &i)) {
 				/* 0.25 == scale factor for less sensitivity */
-				if (BLF_width(fstyle->uifont_id, origstr + i) > (startx - x) * 0.25f) {
+				if (BLF_width(fstyle->uifont_id, origstr + i, BLF_DRAW_STR_DUMMY_MAX) > (startx - x) * 0.25f) {
 					break;
 				}
 			}
@@ -1702,7 +1701,7 @@ static void ui_textedit_set_cursor_pos(uiBut *but, uiHandleButtonData *data, con
 		but->pos = pos_prev = strlen(origstr) - but->ofs;
 
 		while (true) {
-			cdist = startx + BLF_width(fstyle->uifont_id, origstr + but->ofs);
+			cdist = startx + BLF_width(fstyle->uifont_id, origstr + but->ofs, BLF_DRAW_STR_DUMMY_MAX);
 
 			/* check if position is found */
 			if (cdist < x) {
diff --git a/source/blender/editors/interface/interface_regions.c b/source/blender/editors/interface/interface_regions.c
index a6216b486ad..2f37d8e6e98 100644
--- a/source/blender/editors/interface/interface_regions.c
+++ b/source/blender/editors/interface/interface_regions.c
@@ -660,7 +660,7 @@ ARegion *ui_tooltip_create(bContext *C, ARegion *butregion, uiBut *but)
 	h = BLF_height_max(data->fstyle.uifont_id);
 
 	for (a = 0, fontw = 0, fonth = 0; a < data->totline; a++) {
-		w = BLF_width(data->fstyle.uifont_id, data->lines[a]);
+		w = BLF_width(data->fstyle.uifont_id, data->lines[a], sizeof(data->lines[a]));
 		fontw = max_ff(fontw, (float)w);
 		fonth += (a == 0) ? h : h + TIP_MARGIN_Y;
 	}
diff --git a/source/blender/editors/interface/interface_style.c b/source/blender/editors/interface/interface_style.c
index 1c6263c9dd5..38d9f4fcc12 100644
--- a/source/blender/editors/interface/interface_style.c
+++ b/source/blender/editors/interface/interface_style.c
@@ -144,7 +144,7 @@ static uiFont *uifont_to_blfont(int id)
 
 
 void uiStyleFontDrawExt(uiFontStyle *fs, const rcti *rect, const char *str,
-                        float *r_xofs, float *r_yofs)
+                        size_t len, float *r_xofs, float *r_yofs)
 {
 	float height;
 	int xofs = 0, yofs;
@@ -155,14 +155,14 @@ void uiStyleFontDrawExt(uiFontStyle *fs, const rcti *rect, const char *str,
 	yofs = ceil(0.5f * (BLI_rcti_size_y(rect) - height));
 
 	if (fs->align == UI_STYLE_TEXT_CENTER) {
-		xofs = floor(0.5f * (BLI_rcti_size_x(rect) - BLF_width(fs->uifont_id, str)));
+		xofs = floor(0.5f * (BLI_rcti_size_x(rect) - BLF_width(fs->uifont_id, str, len)));
 		/* don't center text if it chops off the start of the text, 2 gives some margin */
 		if (xofs < 2) {
 			xofs = 2;
 		}
 	}
 	else if (fs->align == UI_STYLE_TEXT_RIGHT) {
-		xofs = BLI_rcti_size_x(rect) - BLF_width(fs->uifont_id, str) - 0.1f * U.widget_unit;
+		xofs = BLI_rcti_size_x(rect) - BLF_width(fs->uifont_id, str, len) - 0.1f * U.widget_unit;
 	}
 	
 	/* clip is very strict, so we give it some space */
@@ -194,7 +194,7 @@ void uiStyleFontDraw(uiFontStyle *fs, rcti *rect, const char *str)
 {
 	float xofs, yofs;
 	uiStyleFontDrawExt(fs, rect, str,
-	                   &xofs, &yofs);
+	                   BLF_DRAW_STR_DUMMY_MAX, &xofs, &yofs);
 }
 
 /* drawn same as above, but at 90 degree angle */
@@ -215,7 +215,7 @@ void uiStyleFontDrawRotated(uiFontStyle *fs, rcti *rect, const char *str)
 
 	/* rotate counter-clockwise for now (assumes left-to-right language)*/
 	xofs += height;
-	yofs = BLF_width(fs->uifont_id, str) + 5;
+	yofs = BLF_width(fs->uifont_id, str, BLF_DRAW_STR_DUMMY_MAX) + 5;
 	angle = (float)M_PI / 2.0f;
 
 	/* translate rect to vertical */
@@ -298,7 +298,7 @@ int UI_GetStringWidth(const char *str)
 		BLF_enable(fstyle->uifont_id, BLF_KERNING_DEFAULT);
 	
 	uiStyleFontSet(fstyle);
-	width = BLF_width(fstyle->uifont_id, str);
+	width = BLF_width(fstyle->uifont_id, str, BLF_DRAW_STR_DUMMY_MAX);
 	
 	if (fstyle->kerning == 1)
 		BLF_disable(fstyle->uifont_id, BLF_KERNING_DEFAULT);
diff --git a/source/blender/editors/interface/interface_templates.c b/source/blender/editors/interface/interface_templates.c
index 8926a16481d..6bb6081d135 100644
--- a/source/blender/editors/interface/interface_templates.c
+++ b/source/blender/editors/interface/interface_templates.c
@@ -3299,7 +3299,7 @@ void uiTemplateReportsBanner(uiLayout *layout, bContext *C)
 	ui_abs = uiLayoutAbsolute(layout, FALSE);
 	block = uiLayoutGetBlock(ui_abs);
 	
-	width = BLF_width(style->widget.uifont_id, report->message);
+	width = BLF_width(style->widget.uifont_id, report->message, report->len);
 	width = min_ii((int)(rti->widthfac * width), width);
 	width = max_ii(width, 10);
 	
diff --git a/source/blender/editors/interface/interface_widgets.c b/source/blender/editors/interface/interface_widgets.c
index 0691eb4a9b8..27f16a6fd5c 100644
--- a/source/blender/editors/interface/interface_widgets.c
+++ b/source/blender/editors/interface/interface_widgets.c
@@ -967,11 +967,11 @@ static void ui_text_clip_left(uiFontStyle *fstyle, uiBut *but, const rcti *rect)
 		BLF_enable(fstyle->uifont_id, BLF_KERNING_DEFAULT);
 
 	but->ofs = 0;
-	but->strwidth = BLF_width(fstyle->uifont_id, but->drawstr);
+	but->strwidth = BLF_width(fstyle->uifont_id, but->drawstr, sizeof(but->drawstr));
 
 	while (but->strwidth > okwidth) {
 		ui_text_clip_give_next_off(but);
-		but->strwidth = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs);
+		but->strwidth = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs, sizeof(but->drawstr) - but->ofs);
 		if (but->strwidth < 10) break;
 	}
 
@@ -1001,10 +1001,10 @@ static void ui_text_clip_cursor(uiFontStyle *fstyle, uiBut *but, const rcti *rec
 	if (but->ofs > but->pos)
 		but->ofs = but->pos;
 
-	if (BLF_width(fstyle->uifont_id, but->drawstr) <= okwidth)
+	if (BLF_width(fstyle->uifont_id, but->drawstr, sizeof(but->drawstr)) <= okwidth)
 		but->ofs = 0;
 
-	but->strwidth = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs);
+	but->strwidth = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs, sizeof(but->drawstr) - but->ofs);
 
 	while (but->strwidth > okwidth) {
 		float width;
@@ -1014,7 +1014,7 @@ static void ui_text_clip_cursor(uiFontStyle *fstyle, uiBut *but, const rcti *rec
 		BLI_strncpy_utf8(buf, but->drawstr, sizeof(buf));
 		/* string position of cursor */
 		buf[but->pos] = 0;
-		width = BLF_width(fstyle->uifont_id, buf + but->ofs);
+		width = BLF_width(fstyle->uifont_id, buf + but->ofs, sizeof(buf) - but->ofs);
 
 		/* if cursor is at 20 pixels of right side button we clip left */
 		if (width > okwidth - 20) {
@@ -1032,7 +1032,7 @@ static void ui_text_clip_cursor(uiFontStyle *fstyle, uiBut *but, const rcti *rec
 			but->drawstr[len - bytes] = 0;
 		}
 
-		but->strwidth = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs);
+		but->strwidth = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs, sizeof(but->drawstr) - but->ofs);
 
 		if (but->strwidth < 10) break;
 	}
@@ -1061,7 +1061,7 @@ static void ui_text_clip_right_label(uiFontStyle *fstyle, uiBut *but, const rcti
 	if (fstyle->kerning == 1) /* for BLF_width */
 		BLF_enable(fstyle->uifont_id, BLF_KERNING_DEFAULT);
 	
-	but->strwidth = BLF_width(fstyle->uifont_id, but->drawstr);
+	but->strwidth = BLF_width(fstyle->uifont_id, but->drawstr, sizeof(but->drawstr));
 	but->ofs = 0;
 	
 
@@ -1089,7 +1089,7 @@ static void ui_text_clip_right_label(uiFontStyle *fstyle, uiBut *but, const rcti
 			drawstr_len -= bytes;
 			// BLI_assert(strlen(but->drawstr) == drawstr_len);
 			
-			but->strwidth = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs);
+			but->strwidth = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs, sizeof(but->drawstr) - but->ofs);
 			if (but->strwidth < 10) break;
 		}
 	
@@ -1097,7 +1097,7 @@ static void ui_text_clip_right_label(uiFontStyle *fstyle, uiBut *but, const rcti
 		/* after the leading text is gone, chop off the : and following space, with ofs */
 		while ((but->strwidth > okwidth) && (but->ofs < 2)) {
 			ui_text_clip_give_next_off(but);
-			but->strwidth = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs);
+			but->strwidth = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs, sizeof(but->drawstr) - but->ofs);
 			if (but->strwidth < 10) break;
 		}
 		
@@ -1115,7 +1115,7 @@ static void ui_text_clip_right_label(uiFontStyle *fstyle, uiBut *but, const rcti
 		but->drawstr[drawstr_len] = 0;
 		// BLI_assert(strlen(but->drawstr) == drawstr_len);
 		
-		but->strwidth = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs);
+		but->strwidth = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs, sizeof(but->drawstr) - but->ofs);
 		if (but->strwidth < 10) break;
 	}
 	
@@ -1146,7 +1146,7 @@ static void widget_draw_text(uiFontStyle *fstyle, uiWidgetColors *wcol, uiBut *b
 	
 	/* text button selection and cursor */
 	if (but->editstr && but->pos != -1) {
-		short t = 0, pos = 0, ch;
+		short t = 0, pos = 0;
 		short selsta_tmp, selend_tmp, selsta_draw, selwidth_draw;
 
 		if ((but->selend - but->selsta) > 0) {
@@ -1157,23 +1157,13 @@ static void widget_draw_text(uiFontStyle *fstyle, uiWidgetColors *wcol, uiBut *b
 			if (but->drawstr[0] != 0) {
 
 				if (but->selsta >= but->ofs) {
-					ch = but->drawstr[selsta_tmp];
-					but->drawstr[selsta_tmp] = 0;
-					
-					selsta_draw = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs);
-					
-					but->drawstr[selsta_tmp] = ch;
+					selsta_draw = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs, selsta_tmp - but->ofs);
 				}
 				else {
 					selsta_draw = 0;
 				}
-				
-				ch = but->drawstr[selend_tmp];
-				but->drawstr[selend_tmp] = 0;
-				
-				selwidth_draw = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs);
-				
-				but->drawstr[selend_tmp] = ch;
+
+				selwidth_draw = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs, selend_tmp - but->ofs);
 
 				glColor4ubv((unsigned char *)wcol->item);
 				glRects(rect->xmin + selsta_draw, rect->ymin + 2, rect->xmin + selwidth_draw, rect->ymax - 2);
@@ -1184,12 +1174,7 @@ static void widget_draw_text(uiFontStyle *fstyle, uiWidgetColors *wcol, uiBut *b
 			pos = but->pos;
 			if (pos >= but->ofs) {
 				if (but->drawstr[0] != 0) {
-					ch = but->drawstr[pos];
-					but->drawstr[pos] = 0;
-					
-					t = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs) / but->aspect;
-					
-					but->drawstr[pos] = ch;
+					t = BLF_width(fstyle->uifont_id, but->drawstr + but->ofs, pos - but->ofs) / but->aspect;
 				}
 
 				glColor3f(0.20, 0.6, 0.9);
@@ -1216,7 +1201,8 @@ static void widget_draw_text(uiFontStyle *fstyle, uiWidgetColors *wcol, uiBut *b
 	
 	glColor4ubv((unsigned char *)wcol->text);
 
-	uiStyleFontDrawExt(fstyle, rect, but->drawstr + but->ofs, &font_xofs, &font_yofs);
+	uiStyleFontDrawExt(fstyle, rect, but->drawstr + but->ofs,
+	                   sizeof(but->drawstr) - but->ofs, &font_xofs, &font_yofs);
 
 	if (but->menu_key != '\0') {
 		char fixedbuf[128];
@@ -1239,7 +1225,7 @@ static void widget_draw_text(uiFontStyle *fstyle, uiWidgetColors *wcol, uiBut *b
 			}
 
 			fixedbuf[ul_index] = '\0';
-			ul_advance = BLF_width(fstyle->uifont_id, fixedbuf);
+			ul_advance = BLF_width(fstyle->uifont_id, fixedbuf, ul_index);
 
 			BLF_position(fstyle->uifont_id, rect->xmin + font_xofs + ul_advance, rect->ymin + font_yofs, 0.0f);
 			BLF_draw(fstyle->uifont_id, "_", 2);
@@ -3528,7 +3514,7 @@ void ui_draw_menu_item(uiFontStyle *fstyle, rcti *rect, const char *name, int ic
 		cpoin = strchr(name, UI_SEP_CHAR);
 		if (cpoin) {
 			*cpoin = 0;
-			rect->xmax -= BLF_width(fstyle->uifont_id, cpoin + 1) + 10;
+			rect->xmax -= BLF_width(fstyle->uifont_id, cpoin + 1, INT_MAX) + 10;
 		}
 	}
 	
@@ -3574,7 +3560,7 @@ void ui_draw_preview_item(uiFontStyle *fstyle, rcti *rect, const char *name, int
 	
 	widget_draw_preview(iconid, 1.0f, rect);
 	
-	BLF_width_and_height(fstyle->uifont_id, name, &font_dims[0], &font_dims[1]);
+	BLF_width_and_height(fstyle->uifont_id, name, BLF_DRAW_STR_DUMMY_MAX, &font_dims[0], &font_dims[1]);
 
 	/* text rect */
 	trect.xmin += 0;
diff --git a/source/blender/editors/interface/view2d.c b/source/blender/editors/interface/view2d.c
index e3787789165..6bb623155a5 100644
--- a/source/blender/editors/interface/view2d.c
+++ b/source/blender/editors/interface/view2d.c
@@ -2196,7 +2196,7 @@ void UI_view2d_text_cache_draw(ARegion *ar)
 	int col_pack_prev = 0;
 
 	/* investigate using BLF_ascender() */
-	const float default_height = strings.first ? BLF_height_default("28") : 0.0f;
+	const float default_height = strings.first ? BLF_height_default("28", 3) : 0.0f;
 	
 	// glMatrixMode(GL_PROJECTION);
 	// glPushMatrix();
diff --git a/source/blender/editors/screen/area.c b/source/blender/editors/screen/area.c
index 83a261bc140..8b89c2f0553 100644
--- a/source/blender/editors/screen/area.c
+++ b/source/blender/editors/screen/area.c
@@ -1825,7 +1825,7 @@ void ED_region_info_draw(ARegion *ar, const char *text, int block, float fill_co
 
 	/* box fill entire width or just around text */
 	if (!block)
-		rect.xmax = min_ii(rect.xmax, rect.xmin + BLF_width(fontid, text) + 1.2f * U.widget_unit);
+		rect.xmax = min_ii(rect.xmax, rect.xmin + BLF_width(fontid, text, BLF_DRAW_STR_DUMMY_MAX) + 1.2f * U.widget_unit);
 
 	rect.ymax = BLI_rcti_size_y(&ar->winrct);
 
diff --git a/source/blender/editors/space_clip/clip_dopesheet_draw.c b/source/blender/editors/space_clip/clip_dopesheet_draw.c
index 059b8ace7b9..e85b055bc59 100644
--- a/source/blender/editors/space_clip/clip_dopesheet_draw.c
+++ b/source/blender/editors/space_clip/clip_dopesheet_draw.c
@@ -341,7 +341,7 @@ void clip_draw_dopesheet_channels(const bContext *C, ARegion *ar)
 			else
 				UI_ThemeColor(TH_TEXT);
 
-			font_height = BLF_height(fontid, channel->name);
+			font_height = BLF_height(fontid, channel->name, sizeof(channel->name));
 			BLF_position(fontid, v2d->cur.xmin + CHANNEL_PAD,
 			             y - font_height / 2.0f, 0.0f);
 			BLF_draw(fontid, channel->name, strlen(channel->name));
diff --git a/source/blender/editors/space_clip/clip_draw.c b/source/blender/editors/space_clip/clip_draw.c
index 38e7f87f478..3ca9a9478fa 100644
--- a/source/blender/editors/space_clip/clip_draw.c
+++ b/source/blender/editors/space_clip/clip_draw.c
@@ -87,7 +87,7 @@ void clip_draw_curfra_label(const int framenr, const float x, const float y)
 	BLF_size(fontid, 11.0f, U.dpi);
 	BLI_snprintf(numstr, sizeof(numstr), "%d", framenr);
 
-	BLF_width_and_height(fontid, numstr, &font_dims[0], &font_dims[1]);
+	BLF_width_and_height(fontid, numstr, sizeof(numstr), &font_dims[0], &font_dims[1]);
 
 	glRecti(x, y, x + font_dims[0] + 6.0f, y + font_dims[1] + 4.0f);
 
diff --git a/source/blender/editors/space_file/filesel.c b/source/blender/editors/space_file/filesel.c
index ff0add36bdc..d329d505138 100644
--- a/source/blender/editors/space_file/filesel.c
+++ b/source/blender/editors/space_file/filesel.c
@@ -435,7 +435,7 @@ float file_string_width(const char *str)
 {
 	uiStyle *style = UI_GetStyle();
 	uiStyleFontSet(&style->widget);
-	return BLF_width(style->widget.uifont_id, str);
+	return BLF_width(style->widget.uifont_id, str, BLF_DRAW_STR_DUMMY_MAX);
 }
 
 float file_font_pointsize(void)
diff --git a/source/blender/editors/space_image/image_draw.c b/source/blender/editors/space_image/image_draw.c
index 89e57955339..3d5f6a6ce7e 100644
--- a/source/blender/editors/space_image/image_draw.c
+++ b/source/blender/editors/space_image/image_draw.c
@@ -195,21 +195,21 @@ void ED_image_draw_info(Scene *scene, ARegion *ar, int color_manage, int use_def
 	BLI_snprintf(str, sizeof(str), "X:%-4d  Y:%-4d |", x, y);
 	BLF_position(blf_mono_font, dx, 0.3f * UI_UNIT_Y, 0);
 	BLF_draw_ascii(blf_mono_font, str, sizeof(str));
-	dx += BLF_width(blf_mono_font, str);
+	dx += BLF_width(blf_mono_font, str, sizeof(str));
 
 	if (zp) {
 		glColor3ub(255, 255, 255);
 		BLI_snprintf(str, sizeof(str), " Z:%-.4f |", 0.5f + 0.5f * (((float)*zp) / (float)0x7fffffff));
 		BLF_position(blf_mono_font, dx, 0.3f * UI_UNIT_X, 0);
 		BLF_draw_ascii(blf_mono_font, str, sizeof(str));
-		dx += BLF_width(blf_mono_font, str);
+		dx += BLF_width(blf_mono_font, str, sizeof(str));
 	}
 	if (zpf) {
 		glColor3ub(255, 255, 255);
 		BLI_snprintf(str, sizeof(str), " Z:%-.3f |", *zpf);
 		BLF_position(blf_mono_font, dx, 0.3f * UI_UNIT_X, 0);
 		BLF_draw_ascii(blf_mono_font, str, sizeof(str));
-		dx += BLF_width(blf_mono_font, str);
+		dx += BLF_width(blf_mono_font, str, sizeof(str));
 	}
 
 	if (channels >= 3) {
@@ -222,7 +222,7 @@ void ED_image_draw_info(Scene *scene, ARegion *ar, int color_manage, int use_def
 			BLI_snprintf(str, sizeof(str), "  R:-");
 		BLF_position(blf_mono_font, dx, 0.3f * UI_UNIT_X, 0);
 		BLF_draw_ascii(blf_mono_font, str, sizeof(str));
-		dx += BLF_width(blf_mono_font, str);
+		dx += BLF_width(blf_mono_font, str, sizeof(str));
 		
 		glColor3ubv(green);
 		if (fp)
@@ -233,7 +233,7 @@ void ED_image_draw_info(Scene *scene, ARegion *ar, int color_manage, int use_def
 			BLI_snprintf(str, sizeof(str), "  G:-");
 		BLF_position(blf_mono_font, dx, 0.3f * UI_UNIT_X, 0);
 		BLF_draw_ascii(blf_mono_font, str, sizeof(str));
-		dx += BLF_width(blf_mono_font, str);
+		dx += BLF_width(blf_mono_font, str, sizeof(str));
 		
 		glColor3ubv(blue);
 		if (fp)
@@ -244,7 +244,7 @@ void ED_image_draw_info(Scene *scene, ARegion *ar, int color_manage, int use_def
 			BLI_snprintf(str, sizeof(str), "  B:-");
 		BLF_position(blf_mono_font, dx, 0.3f * UI_UNIT_X, 0);
 		BLF_draw_ascii(blf_mono_font, str, sizeof(str));
-		dx += BLF_width(blf_mono_font, str);
+		dx += BLF_width(blf_mono_font, str, sizeof(str));
 		
 		if (channels == 4) {
 			glColor3ub(255, 255, 255);
@@ -256,7 +256,7 @@ void ED_image_draw_info(Scene *scene, ARegion *ar, int color_manage, int use_def
 				BLI_snprintf(str, sizeof(str), "- ");
 			BLF_position(blf_mono_font, dx, 0.3f * UI_UNIT_X, 0);
 			BLF_draw_ascii(blf_mono_font, str, sizeof(str));
-			dx += BLF_width(blf_mono_font, str);
+			dx += BLF_width(blf_mono_font, str, sizeof(str));
 		}
 
 		if (color_manage) {
@@ -276,7 +276,7 @@ void ED_image_draw_info(Scene *scene, ARegion *ar, int color_manage, int use_def
 			BLI_snprintf(str, sizeof(str), "  |  CM  R:%-.4f  G:%-.4f  B:%-.4f", rgba[0], rgba[1], rgba[2]);
 			BLF_position(blf_mono_font, dx, 0.3f * UI_UNIT_X, 0);
 			BLF_draw_ascii(blf_mono_font, str, sizeof(str));
-			dx += BLF_width(blf_mono_font, str);
+			dx += BLF_width(blf_mono_font, str, sizeof(str));
 		}
 	}
 	
@@ -350,12 +350,12 @@ void ED_image_draw_info(Scene *scene, ARegion *ar, int color_manage, int use_def
 		BLI_snprintf(str, sizeof(str), "V:%-.4f", val);
 		BLF_position(blf_mono_font, dx, 0.3f * UI_UNIT_X, 0);
 		BLF_draw_ascii(blf_mono_font, str, sizeof(str));
-		dx += BLF_width(blf_mono_font, str);
+		dx += BLF_width(blf_mono_font, str, sizeof(str));
 
 		BLI_snprintf(str, sizeof(str), "   L:%-.4f", lum);
 		BLF_position(blf_mono_font, dx, 0.3f * UI_UNIT_X, 0);
 		BLF_draw_ascii(blf_mono_font, str, sizeof(str));
-		dx += BLF_width(blf_mono_font, str);
+		dx += BLF_width(blf_mono_font, str, sizeof(str));
 	}
 	else if (channels >= 3) {
 		rgb_to_hsv(finalcol[0], finalcol[1], finalcol[2], &hue, &sat, &val);
@@ -364,22 +364,22 @@ void ED_image_draw_info(Scene *scene, ARegion *ar, int color_manage, int use_def
 		BLI_snprintf(str, sizeof(str), "H:%-.4f", hue);
 		BLF_position(blf_mono_font, dx, 0.3f * UI_UNIT_X, 0);
 		BLF_draw_ascii(blf_mono_font, str, sizeof(str));
-		dx += BLF_width(blf_mono_font, str);
+		dx += BLF_width(blf_mono_font, str, sizeof(str));
 
 		BLI_snprintf(str, sizeof(str), "  S:%-.4f", sat);
 		BLF_position(blf_mono_font, dx, 0.3f * UI_UNIT_X, 0);
 		BLF_draw_ascii(blf_mono_font, str, sizeof(str));
-		dx += BLF_width(blf_mono_font, str);
+		dx += BLF_width(blf_mono_font, str, sizeof(str));
 
 		BLI_snprintf(str, sizeof(str), "  V:%-.4f", val);
 		BLF_position(blf_mono_font, dx, 0.3f * UI_UNIT_X, 0);
 		BLF_draw_ascii(blf_mono_font, str, sizeof(str));
-		dx += BLF_width(blf_mono_font, str);
+		dx += BLF_width(blf_mono_font, str, sizeof(str));
 
 		BLI_snprintf(str, sizeof(str), "   L:%-.4f", lum);
 		BLF_position(blf_mono_font, dx, 0.3f * UI_UNIT_X, 0);
 		BLF_draw_ascii(blf_mono_font, str, sizeof(str));
-		dx += BLF_width(blf_mono_font, str);
+		dx += BLF_width(blf_mono_font, str, sizeof(str));
 	}
 
 	(void)dx;
diff --git a/source/blender/editors/space_node/drawnode.c b/source/blender/editors/space_node/drawnode.c
index 3040789852f..d4af66b7eb9 100644
--- a/source/blender/editors/space_node/drawnode.c
+++ b/source/blender/editors/space_node/drawnode.c
@@ -406,7 +406,7 @@ static void node_draw_frame_label(bNodeTree *ntree, bNode *node, const float asp
 	/* title color */
 	UI_ThemeColorBlendShade(TH_TEXT, color_id, 0.8f, 10);
 
-	width = BLF_width(fontid, label);
+	width = BLF_width(fontid, label, sizeof(label));
 	ascender = BLF_ascender(fontid);
 	
 	/* 'x' doesn't need aspect correction */
diff --git a/source/blender/editors/space_view3d/view3d_ruler.c b/source/blender/editors/space_view3d/view3d_ruler.c
index 64b747b389b..6aa34baeac6 100644
--- a/source/blender/editors/space_view3d/view3d_ruler.c
+++ b/source/blender/editors/space_view3d/view3d_ruler.c
@@ -541,7 +541,7 @@ static void ruler_info_draw_pixel(const struct bContext *C, ARegion *ar, void *a
 
 				ruler_item_as_string(ruler_item, unit, numstr, sizeof(numstr), prec);
 
-				BLF_width_and_height(blf_mono_font, numstr, &numstr_size[0], &numstr_size[1]);
+				BLF_width_and_height(blf_mono_font, numstr, sizeof(numstr), &numstr_size[0], &numstr_size[1]);
 
 				pos[0] = co_ss[1][0] + (cap_size * 2.0f);
 				pos[1] = co_ss[1][1] - (numstr_size[1] / 2.0f);
@@ -627,7 +627,7 @@ static void ruler_info_draw_pixel(const struct bContext *C, ARegion *ar, void *a
 
 				ruler_item_as_string(ruler_item, unit, numstr, sizeof(numstr), prec);
 
-				BLF_width_and_height(blf_mono_font, numstr, &numstr_size[0], &numstr_size[1]);
+				BLF_width_and_height(blf_mono_font, numstr, sizeof(numstr), &numstr_size[0], &numstr_size[1]);
 
 				mid_v2_v2v2(pos, co_ss[0], co_ss[2]);
 
diff --git a/source/blender/editors/transform/transform.c b/source/blender/editors/transform/transform.c
index f88d8366b8d..2ae94fb6d5a 100644
--- a/source/blender/editors/transform/transform.c
+++ b/source/blender/editors/transform/transform.c
@@ -1758,7 +1758,7 @@ static void drawAutoKeyWarning(TransInfo *UNUSED(t), ARegion *ar)
 
 	ED_region_visible_rect(ar, &rect);
 	
-	BLF_width_and_height_default(printable, &printable_size[0], &printable_size[1]);
+	BLF_width_and_height_default(printable, BLF_DRAW_STR_DUMMY_MAX, &printable_size[0], &printable_size[1]);
 	
 	xco = rect.xmax - (int)printable_size[0] - 10;
 	yco = rect.ymax - (int)printable_size[1] - 10;
diff --git a/source/blender/python/generic/blf_py_api.c b/source/blender/python/generic/blf_py_api.c
index 5b5438defee..768c5506b8c 100644
--- a/source/blender/python/generic/blf_py_api.c
+++ b/source/blender/python/generic/blf_py_api.c
@@ -180,7 +180,7 @@ static PyObject *py_blf_dimensions(PyObject *UNUSED(self), PyObject *args)
 	if (!PyArg_ParseTuple(args, "is:blf.dimensions", &fontid, &text))
 		return NULL;
 
-	BLF_width_and_height(fontid, text, &r_width, &r_height);
+	BLF_width_and_height(fontid, text, INT_MAX, &r_width, &r_height);
 
 	ret = PyTuple_New(2);
 	PyTuple_SET_ITEM(ret, 0, PyFloat_FromDouble(r_width));