diff font/font_peer_ft2.cc @ 0:223b71206888

Initial import
author thib
date Fri, 01 Aug 2008 16:32:45 +0000
parents
children 5f548e5957a8
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+/*
+ * Copyright (c) 2004  Kazunori "jagarl" Ueno
+ * Copyright (c) 2000, 2001 Yuki Sawada
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdexcept>
+#include <string>
+
+using namespace std;
+
+#include "font.h"
+#include "font_peer.h"
+#include "codeconv.h"
+
+namespace XKFont {
+
+typedef struct _FontLibrary {
+  FT_Library super;
+  int ref_count;
+  char **paths;
+  int num_paths;
+} FontLibrary;
+
+static FontLibrary *library = NULL;
+
+static char *default_paths[] = {
+  ".",
+  "/",
+  "/usr/X11R6/lib/X11/fonts/TrueType",
+  "/usr/local/share/fonts/TrueType",
+  "/usr//share/fonts/TrueType",
+  "/usr//share/fonts/tt",
+  NULL
+};
+
+static void font_library_ft2_add_path(const char *path);
+static void font_library_ft2_remove_path(const char *path);
+static void font_library_ft2_add_path(const char *path);
+static char *font_library_ft2_build_path(const char *base, const char *name);
+
+static int
+font_library_ft2_alloc()
+{
+  int i;
+  
+  if (!library) {
+    library = (FontLibrary*) calloc(sizeof(FontLibrary), 1);
+    if (library) {
+      if (FT_Init_FreeType(&library->super))
+	goto _1;
+      fprintf(stderr, "XKFont::font_library_ft2_alloc : FreeType allocated successfully.\n");
+      for (i = 0; default_paths[i]; i++)
+	font_library_ft2_add_path(default_paths[i]);
+    }
+  }
+
+  library->ref_count++;
+  return 1;
+
+ _1:
+  free(library);
+  library = NULL;
+  fprintf(stderr, "XKFont::font_library_ft2_alloc: Couldn't allocate FreeType.\n");
+  return 0;
+}
+
+static void
+font_library_ft2_free()
+{
+  int i;
+  
+  if (!library || library->ref_count <= 0)
+    return;
+  if (--library->ref_count == 0) {
+    FT_Done_FreeType(library->super);
+    for (i = 0; i < library->num_paths; i++)
+      free(library->paths[i]);
+    free(library->paths);
+    free(library);
+    library = NULL;
+    fprintf(stderr, "XKFont::font_library_ft2_free : FreeType done.\n");
+  }
+}
+
+static void
+font_library_ft2_add_path(const char *path)
+{
+  library->num_paths++;
+  if (!library->paths)
+    library->paths = (char**) malloc(sizeof(char *));
+  else
+    library->paths = (char**) realloc( (void*)library->paths,
+			     library->num_paths * sizeof(char *));
+  library->paths[library->num_paths - 1] = strdup(path);
+}
+
+static void
+font_library_ft2_remove_path(const char *path)
+{
+  int i, j;
+
+  for (i = 0; i < library->num_paths; i++) {
+    if (!strcmp(path, library->paths[i])) {
+      library->num_paths--;
+      for (j = i; j < library->num_paths; j++)
+	library->paths[j] = library->paths[j + 1];
+      if (library->num_paths > 0)
+	library->paths = (char**) realloc(library->paths,
+				 library->num_paths * sizeof(char *));
+      else {
+	free(library->paths);
+	library->paths = NULL;
+      }
+    }
+  }
+}
+
+typedef struct _FontEncoding {
+  FT_UShort platform_id;
+  FT_Encoding encoding;
+  FontCodeConverter conv_func;
+} FontEncoding;
+
+static FontEncoding encodings[] = {
+  { 3, (FT_Encoding)ft_encoding_unicode, codeconv_euc_to_unicode },
+  { 3, (FT_Encoding)ft_encoding_sjis, codeconv_euc_to_sjis },
+  { 1, (FT_Encoding)ft_encoding_apple_roman, codeconv_euc_to_latin1 },
+  { (FT_UShort)-1, (FT_Encoding)-1, NULL }
+};
+
+static char *
+font_library_ft2_build_path(const char *base, const char *name)
+{
+  char *path;
+  const char *strs[] = { base, "/", name, NULL };
+  int i = 0;
+  
+  path = (char*) calloc(sizeof(char), strlen(base) + strlen(name) + 2);
+  if (path) 
+    while (strs[i])
+      strcat(path, strs[i++]);
+    
+  return path;
+}
+
+PeerFt2::PeerFt2(const char *name, int index, int hsize, int vsize)
+{
+  int i,j;
+
+  font_library_ft2_alloc();
+  
+  for (i = 0; i < library->num_paths; i++) {
+    char *path = font_library_ft2_build_path(library->paths[i], name);
+    if (path) {
+	if (FT_New_Face(library->super, path, index, &face))
+	  face = NULL;
+	free(path);
+    }
+    if (face)
+	break;
+  }
+  
+  if (!face) {
+	string err = string("XKFont::PeerFt2::PeerFt : Cannot open font(TrueType) : ")+name;
+	throw std::invalid_argument(err);
+  }
+  
+  conv_func = 0;
+  for (i=0; encodings[i].conv_func != 0; i++) {
+	FT_UShort platform_id = encodings[i].platform_id;
+    	FT_Encoding encoding = encodings[i].encoding;
+    	for (j = 0; j < face->num_charmaps; j++) {
+      		FT_CharMap cmap = face->charmaps[j];
+      		if (cmap->platform_id == platform_id && cmap->encoding == encoding) {
+      			if (FT_Set_Charmap(face, cmap) == 0) {
+       				conv_func = encodings[i].conv_func;
+				break;
+      			}
+    		}
+    	}
+	if (conv_func) break;
+  }
+  if (conv_func == 0) {
+	FT_Done_Face(face);
+	fprintf(stderr,"cannot find charmap\n");
+	string err = string("XKFont::PeerFt2::PeerFt : No supported code converter of font (TrueType) ")+name;
+	throw std::invalid_argument(err);
+  }
+  FT_Set_Pixel_Sizes(face, hsize, vsize);
+
+}
+
+PeerFt2::~PeerFt2() {
+	FT_Done_Face(face);
+	font_library_ft2_free();
+}
+
+bool
+PeerFt2::GlyphCreate(unsigned int code, Glyph* glyph)
+{
+  FT_GlyphSlot slot;
+  FT_UInt index;
+  int bmsize;
+
+  if (face == 0) return false;
+  code = conv_func(code);
+  if (code == 0) return false;
+  index = FT_Get_Char_Index(face, code);
+  if (index == 0) return false;
+
+  /* Don't consider error */
+  slot = face->glyph;
+  if (slot) {
+    // if (! FT_Load_Glyph(face, index, FT_LOAD_DEFAULT)) {
+// BITMAP だと なぜか render してくれない……
+// LOAD_DEFAULT でも、下に対応コードを付けたので一応は大丈夫
+    if (! FT_Load_Glyph(face, index, FT_LOAD_NO_BITMAP)) {
+    	FT_Render_Glyph(slot, ft_render_mode_normal);
+    }
+  }
+  
+  glyph->bitmap_left = slot->bitmap_left;
+  glyph->bitmap_top = slot->bitmap_top;
+  glyph->bitmap.width = slot->bitmap.width;
+  glyph->bitmap.rows = slot->bitmap.rows;
+
+/*
+  glyph->metrics.ascender = private->face->size->metrics.ascender >> 6;
+  glyph->metrics.descender = private->face->size->metrics.descender >> 6;
+*/
+
+  glyph->advance.x = slot->advance.x >> 6;
+  glyph->advance.y = slot->advance.y >> 6;
+
+  bmsize = glyph->bitmap.width * glyph->bitmap.rows;
+  if (bmsize > 0) {
+    glyph->bitmap.buffer = new unsigned char[bmsize];
+    memcpy(glyph->bitmap.buffer, slot->bitmap.buffer, bmsize);
+  }
+// なぜか Render したのに MONO なことがある……
+/* for freetype < 2.1.3, use ``ft_pixel_mode_mono'' */
+if (slot->bitmap.pixel_mode == ft_pixel_mode_mono) {int i,j;
+// if (slot->bitmap.pixel_mode == FT_PIXEL_MODE_MONO) {int i,j;
+	char* d = (char*)slot->bitmap.buffer;
+	for (i=0; i<glyph->bitmap.rows; i++) {
+		int flag = *d++; int len = 8;
+		unsigned char* buf = glyph->bitmap.buffer + i*slot->bitmap.width;
+		for (j=0; j<glyph->bitmap.width; j++) {
+			if (len == 0) {
+				flag = *d++;
+				len = 8;
+			}
+			if (flag & 0x80) *buf++ = 0xff;
+			else *buf++ = 0;
+			flag <<= 1;
+			len--;
+		}
+	}
+}
+
+  return true;
+
+}
+
+} /* end of namespace XKFont */
+