From dd7595a3475407a7fa96a97393bae8c5220e8762 Mon Sep 17 00:00:00 2001
From: David Walter Seikel
Date: Wed, 4 Jan 2012 18:41:13 +1000
Subject: Add the base Enlightenment Foundation Libraries - eina, eet, evas,
 ecore, embryo, and edje.

Note that embryo wont be used, but I'm not sure yet if you can build edje without it.
---
 .../lib/engines/common/evas_font_default_walk.x    | 144 +++++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100644 libraries/evas/src/lib/engines/common/evas_font_default_walk.x

(limited to 'libraries/evas/src/lib/engines/common/evas_font_default_walk.x')

diff --git a/libraries/evas/src/lib/engines/common/evas_font_default_walk.x b/libraries/evas/src/lib/engines/common/evas_font_default_walk.x
new file mode 100644
index 0000000..94e7fde
--- /dev/null
+++ b/libraries/evas/src/lib/engines/common/evas_font_default_walk.x
@@ -0,0 +1,144 @@
+#ifndef _EVAS_FONT_DEFAULT_WALK_X
+#define _EVAS_FONT_DEFAULT_WALK_X
+/* Macros for text walking */
+
+/**
+ * @def EVAS_FONT_WALK_TEXT_INIT
+ * @internal
+ * This macro defines the variables that will later be used with the following
+ * macros, and by font handling functions.
+ * @see EVAS_FONT_WALK_TEXT_START
+ * @see EVAS_FONT_WALK_TEXT_WORK
+ * @see EVAS_FONT_WALK_TEXT_END
+ */
+# define EVAS_FONT_WALK_TEXT_INIT() \
+        int _pen_x = 0, _pen_y = 0; \
+        Evas_Coord _start_pen = (text_props->info && \
+              (text_props->start > 0)) ? \
+           text_props->info->glyph[text_props->start - 1].pen_after : 0 ; \
+        size_t char_index; \
+        (void) _pen_y; /* Sometimes it won't be used */
+
+/* Visual walk helper macros */
+#ifdef OT_SUPPORT
+#define _EVAS_FONT_WALK_TEXT_START() \
+        Evas_Font_OT_Info *_ot_itr = (text_props->info) ? \
+           text_props->info->ot + text_props->start : NULL; \
+        if (!_ot_itr) break; \
+        for (char_index = 0 ; char_index < text_props->len ; char_index++, _glyph_itr++, _ot_itr++) \
+          {
+#else
+#define _EVAS_FONT_WALK_TEXT_START() \
+        for (char_index = 0 ; char_index < text_props->len ; char_index++, _glyph_itr++) \
+          {
+#endif
+
+/**
+ * @def EVAS_FONT_WALK_TEXT_START
+ * @internal
+ * This runs through the text in visual order while updating char_index,
+ * which is the current index in the text.
+ * Does not end with a ;
+ * Take a look at EVAS_FONT_WALK_X_OFF and the like.
+ * @see EVAS_FONT_WALK_TEXT_INIT
+ * @see EVAS_FONT_WALK_TEXT_WORK
+ * @see EVAS_FONT_WALK_TEXT_END
+ */
+#define EVAS_FONT_WALK_TEXT_START() \
+   do \
+     { \
+        Evas_Font_Glyph_Info *_glyph_itr = (text_props->info) ? \
+           text_props->info->glyph + text_props->start : NULL; \
+        if (!_glyph_itr) break; \
+        _EVAS_FONT_WALK_TEXT_START()
+
+/*FIXME: doc */
+#ifdef OT_SUPPORT
+# define EVAS_FONT_WALK_X_OFF \
+             (EVAS_FONT_ROUND_26_6_TO_INT(EVAS_FONT_OT_X_OFF_GET(*_ot_itr)))
+# define EVAS_FONT_WALK_Y_OFF \
+             (EVAS_FONT_ROUND_26_6_TO_INT(EVAS_FONT_OT_Y_OFF_GET(*_ot_itr)))
+# define EVAS_FONT_WALK_POS \
+             (EVAS_FONT_OT_POS_GET(*_ot_itr) - text_props->text_offset)
+# define EVAS_FONT_WALK_POS_NEXT \
+              ((!EVAS_FONT_WALK_IS_LAST) ? \
+               EVAS_FONT_OT_POS_GET(*(_ot_itr + 1)) - \
+                text_props->text_offset : \
+               EVAS_FONT_WALK_POS \
+              )
+# define EVAS_FONT_WALK_POS_PREV \
+             ((char_index > 0) ? \
+             EVAS_FONT_OT_POS_GET(*(_ot_itr - 1)) - \
+              text_props->text_offset : \
+              EVAS_FONT_WALK_POS \
+             )
+#else
+# define EVAS_FONT_WALK_X_OFF 0
+# define EVAS_FONT_WALK_Y_OFF 0
+# define EVAS_FONT_WALK_POS \
+              ((text_props->bidi.dir == EVAS_BIDI_DIRECTION_RTL) ? \
+               (text_props->len - char_index - 1) : \
+               (char_index))
+# define EVAS_FONT_WALK_POS_NEXT \
+             ((!EVAS_FONT_WALK_IS_LAST) ? \
+              ((text_props->bidi.dir == EVAS_BIDI_DIRECTION_RTL) ? \
+               text_props->len - char_index - 2 \
+               : (char_index + 1)) : \
+              EVAS_FONT_WALK_POS)
+# define EVAS_FONT_WALK_POS_PREV \
+             ((char_index > 0) ? \
+              ((text_props->bidi.dir == EVAS_BIDI_DIRECTION_RTL) ? \
+               text_props->len - char_index \
+               : (char_index - 1)) : \
+              EVAS_FONT_WALK_POS)
+#endif
+
+
+#define EVAS_FONT_WALK_IS_VISIBLE (_glyph_itr->index != 0)
+#define EVAS_FONT_WALK_X_BEAR (_glyph_itr->x_bear)
+#define EVAS_FONT_WALK_Y_BEAR (fg->glyph_out->top)
+#define EVAS_FONT_WALK_X_ADV ((_glyph_itr > text_props->info->glyph) ? \
+      _glyph_itr->pen_after - (_glyph_itr - 1)->pen_after : \
+      _glyph_itr->pen_after)
+#define EVAS_FONT_WALK_WIDTH (_glyph_itr->width)
+
+#define EVAS_FONT_WALK_INDEX (_glyph_itr->index)
+#define EVAS_FONT_WALK_PEN_X (_pen_x)
+#define EVAS_FONT_WALK_PEN_X_AFTER (_glyph_itr->pen_after - _start_pen)
+#define EVAS_FONT_WALK_PEN_Y (EVAS_FONT_ROUND_26_6_TO_INT(_pen_y))
+#define EVAS_FONT_WALK_Y_ADV (0)
+#define EVAS_FONT_WALK_IS_LAST \
+             (char_index + 1 == text_props->len)
+#define EVAS_FONT_WALK_IS_FIRST \
+             (char_index == 0)
+#define EVAS_FONT_WALK_LEN (text_props->len)
+
+/**
+ * @def EVAS_FONT_WALK_TEXT_WORK
+ * @internal
+ * This macro actually updates the values mentioned in EVAS_FONT_WALK_TEXT_START
+ * according to the current positing in the walk.
+ * @see EVAS_FONT_WALK_TEXT_START
+ * @see EVAS_FONT_WALK_TEXT_INIT
+ * @see EVAS_FONT_WALK_TEXT_END
+ */
+#define EVAS_FONT_WALK_TEXT_WORK() do {} while(0)
+
+/**
+ * @def EVAS_FONT_WALK_TEXT_END
+ * @internal
+ * Closes EVAS_FONT_WALK_TEXT_START, needs to end with a ;
+ * @see EVAS_FONT_WALK_TEXT_START
+ * @see EVAS_FONT_WALK_TEXT_INIT
+ * @see EVAS_FONT_WALK_TEXT_WORK
+ */
+#define EVAS_FONT_WALK_TEXT_END() \
+             if (EVAS_FONT_WALK_IS_VISIBLE) \
+               { \
+                  _pen_x = _glyph_itr->pen_after - _start_pen; \
+               } \
+          } \
+     } \
+   while(0)
+
+#endif
-- 
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