grub2/0424-Speed-up-gfxterm-by-slightly-agglomerating-mallocs.patch

From b6fba8115cc492d54f185f37080817b05871785f Mon Sep 17 00:00:00 2001
From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
Date: Sat, 4 May 2013 15:07:13 +0200
Subject: [PATCH 424/482] 	Speed-up gfxterm by slightly agglomerating
 mallocs.

---
 ChangeLog                |  4 ++++
 grub-core/term/gfxterm.c | 61 ++++++++++++++----------------------------------
 include/grub/unicode.h   | 24 +++++++++++++++++++
 3 files changed, 45 insertions(+), 44 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index a13face..963792e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2013-05-04  Vladimir Serbinenko  <phcoder@gmail.com>
 
+	Speed-up gfxterm by slightly agglomerating mallocs.
+
+2013-05-04  Vladimir Serbinenko  <phcoder@gmail.com>
+
 	More video checks.
 
 2013-05-04  Vladimir Serbinenko  <phcoder@gmail.com>
diff --git a/grub-core/term/gfxterm.c b/grub-core/term/gfxterm.c
index 54636d7..0cb4037 100644
--- a/grub-core/term/gfxterm.c
+++ b/grub-core/term/gfxterm.c
@@ -49,7 +49,7 @@ struct grub_dirty_region
 struct grub_colored_char
 {
   /* An Unicode codepoint.  */
-  struct grub_unicode_glyph *code;
+  struct grub_unicode_glyph code;
 
   /* Color values.  */
   grub_video_color_t fg_color;
@@ -175,14 +175,8 @@ set_term_color (grub_uint8_t term_color)
 static void
 clear_char (struct grub_colored_char *c)
 {
-  if (c->code)
-    {
-      grub_free (c->code->combining);
-      grub_free (c->code);
-    }
-  c->code = grub_unicode_glyph_from_code (' ');
-  if (!c->code)
-    grub_errno = GRUB_ERR_NONE;
+  grub_free (c->code.combining);
+  grub_unicode_set_glyph_from_code (&c->code, ' ');
   c->fg_color = virtual_screen.fg_color;
   c->bg_color = virtual_screen.bg_color;
 }
@@ -197,11 +191,7 @@ grub_virtual_screen_free (void)
       for (i = 0;
 	   i < virtual_screen.columns * virtual_screen.rows;
 	   i++)
-	if (virtual_screen.text_buffer[i].code)
-	  {
-	    grub_free (virtual_screen.text_buffer[i].code->combining);
-	    grub_free (virtual_screen.text_buffer[i].code);
-	  }
+	grub_free (virtual_screen.text_buffer[i].code.combining);
       grub_free (virtual_screen.text_buffer);
     }
 
@@ -277,7 +267,7 @@ grub_virtual_screen_setup (unsigned int x, unsigned int y,
   /* Clear out text buffer. */
   for (i = 0; i < virtual_screen.columns * virtual_screen.rows; i++)
     {
-      virtual_screen.text_buffer[i].code = 0;
+      virtual_screen.text_buffer[i].code.combining = 0;
       clear_char (&(virtual_screen.text_buffer[i]));
     }
 
@@ -418,12 +408,9 @@ grub_gfxterm_term_fini (struct grub_term_output *term __attribute__ ((unused)))
 
   for (i = 0; i < virtual_screen.columns * virtual_screen.rows; i++)
     {
-      if (virtual_screen.text_buffer[i].code)
-	{
-	  grub_free (virtual_screen.text_buffer[i].code->combining);
-	  grub_free (virtual_screen.text_buffer[i].code);
-	}
-      virtual_screen.text_buffer[i].code = 0;
+      grub_free (virtual_screen.text_buffer[i].code.combining);
+      virtual_screen.text_buffer[i].code.combining = 0;
+      virtual_screen.text_buffer[i].code.base = 0;
     }
 
   /* Clear error state.  */
@@ -634,11 +621,11 @@ paint_char (unsigned cx, unsigned cy)
   p = (virtual_screen.text_buffer
        + cx + (cy * virtual_screen.columns));
 
-  if (!p->code)
+  if (!p->code.base)
     return;
 
   /* Get glyph for character.  */
-  glyph = grub_font_construct_glyph (virtual_screen.font, p->code);
+  glyph = grub_font_construct_glyph (virtual_screen.font, &p->code);
   if (!glyph)
     {
       grub_errno = GRUB_ERR_NONE;
@@ -817,11 +804,7 @@ scroll_up (void)
 
   /* Clear first line in text buffer.  */
   for (i = 0; i < virtual_screen.columns; i++)
-    if (virtual_screen.text_buffer[i].code)
-      {
-	grub_free (virtual_screen.text_buffer[i].code->combining);
-	grub_free (virtual_screen.text_buffer[i].code);
-      }
+    grub_free (virtual_screen.text_buffer[i].code.combining);
 
   /* Scroll text buffer with one line to up.  */
   grub_memmove (virtual_screen.text_buffer,
@@ -834,10 +817,7 @@ scroll_up (void)
   for (i = virtual_screen.columns * (virtual_screen.rows - 1);
        i < virtual_screen.columns * virtual_screen.rows;
        i++)
-    {
-      virtual_screen.text_buffer[i].code = 0;
-      clear_char (&(virtual_screen.text_buffer[i]));
-    }
+    clear_char (&(virtual_screen.text_buffer[i]));
 
   virtual_screen.total_scroll++;
 }
@@ -897,14 +877,9 @@ grub_gfxterm_putchar (struct grub_term_output *term,
       p = (virtual_screen.text_buffer +
            virtual_screen.cursor_x +
            virtual_screen.cursor_y * virtual_screen.columns);
-      if (p->code)
-	{
-	  grub_free (p->code->combining);
-	  grub_free (p->code);
-	}
-      p->code = grub_unicode_glyph_dup (c);
-      if (!p->code)
-	grub_errno = GRUB_ERR_NONE;
+      grub_free (p->code.combining);
+      grub_unicode_set_glyph (&p->code, c);
+      grub_errno = GRUB_ERR_NONE;
       p->fg_color = virtual_screen.fg_color;
       p->bg_color = virtual_screen.bg_color;
 
@@ -916,11 +891,9 @@ grub_gfxterm_putchar (struct grub_term_output *term,
           for (i = 1; i < char_width && p + i < 
 		 virtual_screen.text_buffer + virtual_screen.columns
 		 * virtual_screen.rows; i++)
-	    if (p[i].code)
 	      {
-		grub_free (p[i].code->combining);
-		grub_free (p[i].code);
-		p[i].code = NULL;
+		grub_free (p[i].code.combining);
+		p[i].code.base = 0;
 	      }
         }
 
diff --git a/include/grub/unicode.h b/include/grub/unicode.h
index 5a96a19..3d79c4c 100644
--- a/include/grub/unicode.h
+++ b/include/grub/unicode.h
@@ -274,6 +274,21 @@ grub_unicode_glyph_dup (const struct grub_unicode_glyph *in)
   return out;
 }
 
+static inline void
+grub_unicode_set_glyph (struct grub_unicode_glyph *out,
+			const struct grub_unicode_glyph *in)
+{
+  grub_memcpy (out, in, sizeof (*in));
+  if (in->combining)
+    {
+      out->combining = grub_malloc (in->ncomb * sizeof (out->combining[0]));
+      if (!out->combining)
+	return;
+      grub_memcpy (out->combining, in->combining,
+		   in->ncomb * sizeof (out->combining[0]));
+    }
+}
+
 static inline struct grub_unicode_glyph *
 grub_unicode_glyph_from_code (grub_uint32_t code)
 {
@@ -287,6 +302,15 @@ grub_unicode_glyph_from_code (grub_uint32_t code)
   return ret;
 }
 
+static inline void
+grub_unicode_set_glyph_from_code (struct grub_unicode_glyph *glyph,
+				  grub_uint32_t code)
+{
+  grub_memset (glyph, 0, sizeof (*glyph));
+
+  glyph->base = code;
+}
+
 grub_uint32_t
 grub_unicode_mirror_code (grub_uint32_t in);
 grub_uint32_t
-- 
1.8.2.1