fixup! feat(core): refactor display drivers

core/embed/lib/gl_draw.h

@@ -135,6 +135,9 @@ void gl_draw_bar(gl_rect_t rect, gl_color_t color);
 // The destination rectangle may not be fully filled if the source bitmap
 // is smaller then destination rectangle or if the bitmap is translated by
 // an offset partially or completely outside the destination rectangle.
+//
+// Currently, we use `gl_draw_bitmap` exclusively for text rendering.
+// Not all bitmap formats are supported now. Please see the implementation.
 void gl_draw_bitmap(gl_rect_t rect, const gl_bitmap_t* bitmap);
 
 // Draws a text to the specified position.