Cleanup: remove window_manager & editor includes from BLF

Remove the need to include the window manager & editor functions
in low level font rendering code.

- The default font size is now set when changed in the preferences.
- Flushing cache is set as a callback.

source/blender/blenfont/BLF_api.h

@@ -43,6 +43,8 @@ void BLF_exit(void);
 
 void BLF_cache_clear(void);
 
+void BLF_cache_flush_set_fn(void (*cache_flush_fn)(void));
+
 /* Loads a font, or returns an already loaded font and increments its reference count. */
 int BLF_load(const char *name) ATTR_NONNULL();
 int BLF_load_mem(const char *name, const unsigned char *mem, int mem_size) ATTR_NONNULL();
@@ -250,6 +252,7 @@ void BLF_thumb_preview(const char *filename,
 
 /* blf_default.c */
 void BLF_default_dpi(int dpi);
+void BLF_default_size(int size);
 void BLF_default_set(int fontid);
 int BLF_default(void); /* get default font ID so we can pass it to other functions */
 /* Draw the string using the default font, size and dpi. */

source/blender/blenfont/CMakeLists.txt

@@ -23,12 +23,10 @@ set(INC
   ../blenkernel
   ../blenlib
   ../blentranslation
-  ../editors/include
   ../gpu
   ../imbuf
   ../makesdna
   ../makesrna
-  ../windowmanager
   ../../../intern/glew-mx
   ../../../intern/guardedalloc
 )

source/blender/blenfont/intern/blf_default.c

@@ -29,8 +29,6 @@
 
 #include "BLF_api.h"
 
-#include "UI_interface.h"
-
 #include "blf_internal.h"
 
 /* call BLF_default_set first! */
@@ -39,12 +37,19 @@
 /* Default size and dpi, for BLF_draw_default. */
 static int global_font_default = -1;
 static int global_font_dpi = 72;
+/* Keep in sync with `UI_style_get()->widgetlabel.points` */
+static int global_font_size = 11;
 
 void BLF_default_dpi(int dpi)
 {
   global_font_dpi = dpi;
 }
 
+void BLF_default_size(int size)
+{
+  global_font_size = size;
+}
+
 void BLF_default_set(int fontid)
 {
   if ((fontid == -1) || blf_font_id_is_valid(fontid)) {
@@ -62,8 +67,7 @@ int BLF_set_default(void)
 {
   ASSERT_DEFAULT_SET;
 
-  const uiStyle *style = UI_style_get();
-  BLF_size(global_font_default, style->widgetlabel.points, global_font_dpi);
+  BLF_size(global_font_default, global_font_size, global_font_dpi);
 
   return global_font_default;
 }
@@ -71,9 +75,7 @@ int BLF_set_default(void)
 void BLF_draw_default(float x, float y, float z, const char *str, const size_t str_len)
 {
   ASSERT_DEFAULT_SET;
-
-  const uiStyle *style = UI_style_get();
-  BLF_size(global_font_default, style->widgetlabel.points, global_font_dpi);
+  BLF_size(global_font_default, global_font_size, global_font_dpi);
   BLF_position(global_font_default, x, y, z);
   BLF_draw(global_font_default, str, str_len);
 }

source/blender/blenfont/intern/blf_font.c

@@ -50,8 +50,6 @@
 
 #include "BLF_api.h"
 
-#include "UI_interface.h"
-
 #include "GPU_batch.h"
 #include "GPU_matrix.h"
 
@@ -72,6 +70,9 @@ static FT_Library ft_lib;
 static SpinLock ft_lib_mutex;
 static SpinLock blf_glyph_cache_mutex;
 
+/* May be set to #UI_widgetbase_draw_cache_flush. */
+static void (*blf_draw_cache_flush)(void) = NULL;
+
 /* -------------------------------------------------------------------- */
 /** \name FreeType Utilities (Internal)
  * \{ */
@@ -255,10 +256,10 @@ void blf_batch_draw(void)
 
   GPU_blend(GPU_BLEND_ALPHA);
 
-#ifndef BLF_STANDALONE
   /* We need to flush widget base first to ensure correct ordering. */
-  UI_widgetbase_draw_cache_flush();
-#endif
+  if (blf_draw_cache_flush != NULL) {
+    blf_draw_cache_flush();
+  }
 
   GPUTexture *texture = blf_batch_cache_texture_load();
   GPU_vertbuf_data_len_set(g_batch.verts, g_batch.glyph_len);
@@ -1167,6 +1168,14 @@ void blf_font_exit(void)
   blf_batch_draw_exit();
 }
 
+/**
+ * Optional cache flushing function, called before #blf_batch_draw.
+ */
+void BLF_cache_flush_set_fn(void (*cache_flush_fn)(void))
+{
+  blf_draw_cache_flush = cache_flush_fn;
+}
+
 /** \} */
 
 /* -------------------------------------------------------------------- */

source/blender/editors/interface/interface_style.c

@@ -419,7 +419,7 @@ int UI_fontstyle_height_max(const uiFontStyle *fs)
 /* reading without uifont will create one */
 void uiStyleInit(void)
 {
-  uiStyle *style = U.uistyles.first;
+  const uiStyle *style = U.uistyles.first;
 
   /* recover from uninitialized dpi */
   if (U.dpi == 0) {
@@ -490,9 +490,13 @@ void uiStyleInit(void)
   }
 
   if (style == NULL) {
-    ui_style_new(&U.uistyles, "Default Style", UIFONT_DEFAULT);
+    style = ui_style_new(&U.uistyles, "Default Style", UIFONT_DEFAULT);
   }
 
+  BLF_cache_flush_set_fn(UI_widgetbase_draw_cache_flush);
+
+  BLF_default_size(style->widgetlabel.points);
+
   /* XXX, this should be moved into a style,
    * but for now best only load the monospaced font once. */
   BLI_assert(blf_mono_font == -1);

source/blender/makesrna/intern/rna_userdef.c

@@ -265,6 +265,14 @@ static void rna_userdef_theme_update(Main *bmain, Scene *scene, PointerRNA *ptr)
   rna_userdef_update(bmain, scene, ptr);
 }
 
+static void rna_userdef_theme_text_style_update(Main *bmain, Scene *scene, PointerRNA *ptr)
+{
+  const uiStyle *style = UI_style_get();
+  BLF_default_size(style->widgetlabel.points);
+
+  rna_userdef_update(bmain, scene, ptr);
+}
+
 static void rna_userdef_gizmo_update(Main *bmain, Scene *scene, PointerRNA *ptr)
 {
   WM_reinit_gizmomap_all(bmain);
@@ -1131,36 +1139,36 @@ static void rna_def_userdef_theme_ui_font_style(BlenderRNA *brna)
   prop = RNA_def_property(srna, "points", PROP_INT, PROP_NONE);
   RNA_def_property_range(prop, 6, 24);
   RNA_def_property_ui_text(prop, "Points", "Font size in points");
-  RNA_def_property_update(prop, 0, "rna_userdef_theme_update");
+  RNA_def_property_update(prop, 0, "rna_userdef_theme_text_style_update");
 
   prop = RNA_def_property(srna, "shadow", PROP_INT, PROP_PIXEL);
   RNA_def_property_range(prop, 0, 5);
   RNA_def_property_ui_text(prop, "Shadow Size", "Shadow size (0, 3 and 5 supported)");
-  RNA_def_property_update(prop, 0, "rna_userdef_theme_update");
+  RNA_def_property_update(prop, 0, "rna_userdef_theme_text_style_update");
 
   prop = RNA_def_property(srna, "shadow_offset_x", PROP_INT, PROP_PIXEL);
   RNA_def_property_int_sdna(prop, NULL, "shadx");
   RNA_def_property_range(prop, -10, 10);
   RNA_def_property_ui_text(prop, "Shadow X Offset", "Shadow offset in pixels");
-  RNA_def_property_update(prop, 0, "rna_userdef_theme_update");
+  RNA_def_property_update(prop, 0, "rna_userdef_theme_text_style_update");
 
   prop = RNA_def_property(srna, "shadow_offset_y", PROP_INT, PROP_PIXEL);
   RNA_def_property_int_sdna(prop, NULL, "shady");
   RNA_def_property_range(prop, -10, 10);
   RNA_def_property_ui_text(prop, "Shadow Y Offset", "Shadow offset in pixels");
-  RNA_def_property_update(prop, 0, "rna_userdef_theme_update");
+  RNA_def_property_update(prop, 0, "rna_userdef_theme_text_style_update");
 
   prop = RNA_def_property(srna, "shadow_alpha", PROP_FLOAT, PROP_FACTOR);
   RNA_def_property_float_sdna(prop, NULL, "shadowalpha");
   RNA_def_property_range(prop, 0.0f, 1.0f);
   RNA_def_property_ui_text(prop, "Shadow Alpha", "");
-  RNA_def_property_update(prop, 0, "rna_userdef_theme_update");
+  RNA_def_property_update(prop, 0, "rna_userdef_theme_text_style_update");
 
   prop = RNA_def_property(srna, "shadow_value", PROP_FLOAT, PROP_FACTOR);
   RNA_def_property_float_sdna(prop, NULL, "shadowcolor");
   RNA_def_property_range(prop, 0.0f, 1.0f);
   RNA_def_property_ui_text(prop, "Shadow Brightness", "Shadow color in gray value");
-  RNA_def_property_update(prop, 0, "rna_userdef_theme_update");
+  RNA_def_property_update(prop, 0, "rna_userdef_theme_text_style_update");
 }
 
 static void rna_def_userdef_theme_ui_style(BlenderRNA *brna)