font-viewer: Use cairo for font rendering

Taken from gnome-font-viewer based on initial patch by Rodrigo Moya and updated by Cosimo Cecchi <[email protected]> commit: 51110f87d6f134f8481031f13fdc3bc3759991bb
author: raveit <[email protected]> 2015-08-08 20:59:06 +0200
committer: infirit <[email protected]> 2015-08-08 20:59:57 +0200
commit: 11a458806bf0775b663c164dfc1403f1f3947784 (patch)
tree: 9b67aeaf2f61b91d72d96e0d67261a000b5c2fb4 /font-viewer/font-thumbnailer.c
parent: 0c8fd57afb370b8f9ecc2b1fc41c568dbba27a37 (diff)
download: mate-control-center-11a458806bf0775b663c164dfc1403f1f3947784.tar.bz2
mate-control-center-11a458806bf0775b663c164dfc1403f1f3947784.tar.xz
1 files changed, 148 insertions, 111 deletions
diff --git a/font-viewer/font-thumbnailer.c b/font-viewer/font-thumbnailer.c
index 921d2679..5992b3a7 100644
--- a/font-viewer/font-thumbnailer.c
+++ b/font-viewer/font-thumbnailer.c
@@ -1,5 +1,8 @@
-/* -*- mode: C; c-basic-offset: 4 -*-
- * fontilus - a collection of font utilities for MATE
+/* -*- mode: C; c-basic-offset: 4 -*- */
+
+/*
+ * font-thumbnailer: a thumbnailer for font files, using FreeType
+ *
 * Copyright (C) 2002-2003 James Henstridge <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
@@ -23,19 +26,18 @@
 
 #include <stdio.h>
 #include <locale.h>
-
 #include <ft2build.h>
 #include FT_FREETYPE_H
 
 #include <gdk-pixbuf/gdk-pixbuf.h>
-
 #include <gio/gio.h>
 #include <glib/gi18n.h>
 
+#include "ftstream-vfs.h"
 #include "totem-resources.h"
 
 static const gchar *
-get_ft_error(FT_Error error)
+get_ft_error (FT_Error error)
 {
 #undef __FTERRORS_H__
 #define FT_ERRORDEF(e,v,s) case e: return s;
@@ -51,83 +53,87 @@ get_ft_error(FT_Error error)
 #define FONT_SIZE 64
 #define PAD_PIXELS 4
 
-FT_Error FT_New_Face_From_URI(FT_Library library,
- const gchar *uri,
- FT_Long face_index,
- FT_Face *aface);
-
 static void
-draw_bitmap(GdkPixbuf *pixbuf, FT_Bitmap *bitmap, gint off_x, gint off_y)
+draw_bitmap (GdkPixbuf *pixbuf,
+ FT_Bitmap *bitmap,
+ gint off_x,
+ gint off_y)
 {
 guchar *buffer;
 gint p_width, p_height, p_rowstride;
 gint i, j;
 
- buffer = gdk_pixbuf_get_pixels(pixbuf);
- p_width = gdk_pixbuf_get_width(pixbuf);
- p_height = gdk_pixbuf_get_height(pixbuf);
- p_rowstride = gdk_pixbuf_get_rowstride(pixbuf);
+ buffer = gdk_pixbuf_get_pixels (pixbuf);
+ p_width = gdk_pixbuf_get_width (pixbuf);
+ p_height = gdk_pixbuf_get_height (pixbuf);
+ p_rowstride = gdk_pixbuf_get_rowstride (pixbuf);
 
 for (j = 0; j < bitmap->rows; j++) {
 if (j + off_y < 0 || j + off_y >= p_height)
 continue;
+
 for (i = 0; i < bitmap->width; i++) {
 guchar pixel;
 gint pos;
 
 if (i + off_x < 0 || i + off_x >= p_width)
 continue;
+
 switch (bitmap->pixel_mode) {
 case ft_pixel_mode_mono:
- pixel = bitmap->buffer[j * bitmap->pitch + i/8];
+ pixel = bitmap->buffer[j * bitmap->pitch + i / 8];
 pixel = 255 - ((pixel >> (7 - i % 8)) & 0x1) * 255;
 break;
 case ft_pixel_mode_grays:
- pixel = 255 - bitmap->buffer[j*bitmap->pitch + i];
+ pixel = 255 - bitmap->buffer[j * bitmap->pitch + i];
 break;
 default:
 pixel = 255;
 }
 pos = (j + off_y) * p_rowstride + 3 * (i + off_x);
- buffer[pos] = pixel;
- buffer[pos+1] = pixel;
- buffer[pos+2] = pixel;
+ buffer[pos] = pixel;
+ buffer[pos + 1] = pixel;
+ buffer[pos + 2] = pixel;
 }
 }
 }
 
 static void
-draw_char(GdkPixbuf *pixbuf, FT_Face face, FT_UInt glyph_index,
- gint *pen_x, gint *pen_y)
+draw_char (GdkPixbuf *pixbuf,
+ FT_Face face,
+ FT_UInt glyph_index,
+ gint *pen_x,
+ gint *pen_y)
 {
 FT_Error error;
 FT_GlyphSlot slot;
 
 slot = face->glyph;
 
- error = FT_Load_Glyph(face, glyph_index, FT_LOAD_DEFAULT);
+ error = FT_Load_Glyph (face, glyph_index, FT_LOAD_DEFAULT);
 if (error) {
- g_printerr("could not load glyph index '%ud': %s\n", glyph_index,
- get_ft_error(error));
+ g_printerr ("Could not load glyph index '%ud': %s\n", glyph_index,
+ get_ft_error (error));
 return;
 }
 
- error = FT_Render_Glyph(slot, ft_render_mode_normal);
+ error = FT_Render_Glyph (slot, ft_render_mode_normal);
 if (error) {
- g_printerr("could not render glyph index '%ud': %s\n", glyph_index,
- get_ft_error(error));
+ g_printerr("Could not render glyph index '%ud': %s\n", glyph_index,
+ get_ft_error (error));
 return;
 }
 
- draw_bitmap(pixbuf, &slot->bitmap,
- *pen_x + slot->bitmap_left,
- *pen_y - slot->bitmap_top);
+ draw_bitmap (pixbuf, &slot->bitmap,
+ *pen_x + slot->bitmap_left,
+ *pen_y - slot->bitmap_top);
 
 *pen_x += slot->advance.x >> 6;
 }
 
 static void
-save_pixbuf(GdkPixbuf *pixbuf, gchar *filename)
+save_pixbuf (GdkPixbuf *pixbuf,
+ const gchar *filename)
 {
 guchar *buffer;
 gint p_width, p_height, p_rowstride;
@@ -135,111 +141,127 @@ save_pixbuf(GdkPixbuf *pixbuf, gchar *filename)
 gint trim_left, trim_right, trim_top, trim_bottom;
 GdkPixbuf *subpixbuf;
 
- buffer = gdk_pixbuf_get_pixels(pixbuf);
- p_width = gdk_pixbuf_get_width(pixbuf);
- p_height = gdk_pixbuf_get_height(pixbuf);
- p_rowstride = gdk_pixbuf_get_rowstride(pixbuf);
+ buffer = gdk_pixbuf_get_pixels (pixbuf);
+ p_width = gdk_pixbuf_get_width (pixbuf);
+ p_height = gdk_pixbuf_get_height (pixbuf);
+ p_rowstride = gdk_pixbuf_get_rowstride (pixbuf);
 
 for (i = 0; i < p_width; i++) {
 gboolean seen_pixel = FALSE;
 
 for (j = 0; j < p_height; j++) {
- gint offset = j * p_rowstride + 3*i;
+ gint offset = j * p_rowstride + 3 * i;
+
+ seen_pixel = (buffer[offset] != 0xff ||
+ buffer[offset + 1] != 0xff ||
+ buffer[offset + 2] != 0xff);
 
- seen_pixel = (buffer[offset] != 0xff ||
- buffer[offset+1] != 0xff ||
- buffer[offset+2] != 0xff);
 if (seen_pixel)
 break;
 }
+
 if (seen_pixel)
 break;
 }
- trim_left = MIN(p_width, i);
- trim_left = MAX(trim_left - PAD_PIXELS, 0);
 
- for (i = p_width-1; i >= trim_left; i--) {
+ trim_left = MIN (p_width, i);
+ trim_left = MAX (trim_left - PAD_PIXELS, 0);
+
+ for (i = p_width - 1; i >= trim_left; i--) {
 gboolean seen_pixel = FALSE;
 
 for (j = 0; j < p_height; j++) {
- gint offset = j * p_rowstride + 3*i;
+ gint offset = j * p_rowstride + 3 * i;
+
+ seen_pixel = (buffer[offset] != 0xff ||
+ buffer[offset + 1] != 0xff ||
+ buffer[offset + 2] != 0xff);
 
- seen_pixel = (buffer[offset] != 0xff ||
- buffer[offset+1] != 0xff ||
- buffer[offset+2] != 0xff);
 if (seen_pixel)
 break;
 }
+
 if (seen_pixel)
 break;
 }
- trim_right = MAX(trim_left, i);
- trim_right = MIN(trim_right + PAD_PIXELS, p_width-1);
+
+ trim_right = MAX (trim_left, i);
+ trim_right = MIN (trim_right + PAD_PIXELS, p_width - 1);
 
 for (j = 0; j < p_height; j++) {
 gboolean seen_pixel = FALSE;
 
 for (i = 0; i < p_width; i++) {
- gint offset = j * p_rowstride + 3*i;
+ gint offset = j * p_rowstride + 3 * i;
+
+ seen_pixel = (buffer[offset] != 0xff ||
+ buffer[offset + 1] != 0xff ||
+ buffer[offset + 2] != 0xff);
 
- seen_pixel = (buffer[offset] != 0xff ||
- buffer[offset+1] != 0xff ||
- buffer[offset+2] != 0xff);
 if (seen_pixel)
 break;
 }
+
 if (seen_pixel)
 break;
 }
- trim_top = MIN(p_height, j);
- trim_top = MAX(trim_top - PAD_PIXELS, 0);
 
- for (j = p_height-1; j >= trim_top; j--) {
+ trim_top = MIN (p_height, j);
+ trim_top = MAX (trim_top - PAD_PIXELS, 0);
+
+ for (j = p_height - 1; j >= trim_top; j--) {
 gboolean seen_pixel = FALSE;
 
 for (i = 0; i < p_width; i++) {
- gint offset = j * p_rowstride + 3*i;
+ gint offset = j * p_rowstride + 3 * i;
+
+ seen_pixel = (buffer[offset] != 0xff ||
+ buffer[offset + 1] != 0xff ||
+ buffer[offset + 2] != 0xff);
 
- seen_pixel = (buffer[offset] != 0xff ||
- buffer[offset+1] != 0xff ||
- buffer[offset+2] != 0xff);
 if (seen_pixel)
 break;
 }
+
 if (seen_pixel)
 break;
 }
- trim_bottom = MAX(trim_top, j);
- trim_bottom = MIN(trim_bottom + PAD_PIXELS, p_height-1);
-
- subpixbuf = gdk_pixbuf_new_subpixbuf(pixbuf, trim_left, trim_top,
- trim_right - trim_left,
- trim_bottom - trim_top);
- gdk_pixbuf_save(subpixbuf, filename, "png", NULL, NULL);
- g_object_unref(subpixbuf);
+
+ trim_bottom = MAX (trim_top, j);
+ trim_bottom = MIN (trim_bottom + PAD_PIXELS, p_height - 1);
+
+ subpixbuf = gdk_pixbuf_new_subpixbuf (pixbuf,
+ trim_left, trim_top,
+ trim_right - trim_left,
+ trim_bottom - trim_top);
+
+ gdk_pixbuf_save (subpixbuf, filename,
+ "png", NULL, NULL);
+ g_object_unref (subpixbuf);
 }
 
 int
-main(int argc, char **argv)
+main (int argc,
+ char **argv)
 {
 FT_Error error;
 FT_Library library;
 FT_Face face;
 FT_UInt glyph_index1, glyph_index2;
 GFile *file;
- gchar *uri;
 GdkPixbuf *pixbuf;
 guchar *buffer;
 gint i, len, pen_x, pen_y;
 gunichar *thumbstr = NULL;
 glong thumbstr_len = 2;
 gint font_size = FONT_SIZE;
- gchar *thumbstr_utf8 = NULL;
+ gchar *thumbstr_utf8 = NULL, *help, *uri;
 gchar **arguments = NULL;
 GOptionContext *context;
 GError *gerror = NULL;
 gboolean retval, default_thumbstr = TRUE;
 gint rv = 1;
+
 const GOptionEntry options[] = {
 { "text", 't', 0, G_OPTION_ARG_STRING, &thumbstr_utf8,
 N_("Text to thumbnail (default: Aa)"), N_("TEXT") },
@@ -260,19 +282,24 @@ main(int argc, char **argv)
 g_option_context_add_main_entries (context, options, GETTEXT_PACKAGE);
 
 retval = g_option_context_parse (context, &argc, &argv, &gerror);
- g_option_context_free (context);
 if (!retval) {
- g_printerr (_("Error parsing arguments: %s\n"), gerror->message);
+ g_printerr ("Error parsing arguments: %s\n", gerror->message);
+
+ g_option_context_free (context);
 g_error_free (gerror);
 return 1;
 }
 
 if (!arguments || g_strv_length (arguments) != 2) {
- /* FIXME: once glib bug 336089 is fixed, use print_help here instead! */
- g_printerr("usage: %s [--text TEXT] [--size SIZE] FONT-FILE OUTPUT-FILE\n", argv[0]);
+ help = g_option_context_get_help (context, TRUE, NULL);
+ g_printerr ("%s", help);
+
+ g_option_context_free (context);
 goto out;
 }
 
+ g_option_context_free (context);
+
 if (thumbstr_utf8 != NULL) {
 /* build ucs4 version of string to thumbnail */
 gerror = NULL;
@@ -280,17 +307,16 @@ main(int argc, char **argv)
 NULL, &thumbstr_len, &gerror);
 default_thumbstr = FALSE;
 
- /* Not sure this can really happen... */
 if (gerror != NULL) {
- g_printerr("Failed to convert: %s\n", gerror->message);
- g_error_free (gerror);
- goto out;
+ g_printerr ("Failed to convert: %s\n", gerror->message);
+ g_error_free (gerror);
+ goto out;
 }
 }
 
- error = FT_Init_FreeType(&library);
+ error = FT_Init_FreeType (&library);
 if (error) {
- g_printerr("could not initialise freetype: %s\n", get_ft_error(error));
+ g_printerr("Could not initialise freetype: %s\n", get_ft_error (error));
 goto out;
 }
 
@@ -300,47 +326,53 @@ main(int argc, char **argv)
 uri = g_file_get_uri (file);
 g_object_unref (file);
 
- error = FT_New_Face_From_URI(library, uri, 0, &face);
+ error = FT_New_Face_From_URI (library, uri, 0, &face);
 if (error) {
- g_printerr("could not load face '%s': %s\n", uri,
- get_ft_error(error));
+ g_printerr ("Could not load face '%s': %s\n", uri,
+ get_ft_error (error));
 g_free (uri);
 goto out;
 }
 
 g_free (uri);
 
- error = FT_Set_Pixel_Sizes(face, 0, font_size);
+ error = FT_Set_Pixel_Sizes (face, 0, font_size);
 if (error) {
- g_printerr("could not set pixel size: %s\n", get_ft_error(error));
- /* goto out; */
+ g_printerr ("Could not set pixel size: %s\n", get_ft_error (error));
+ goto out;
 }
 
 for (i = 0; i < face->num_charmaps; i++) {
 if (face->charmaps[i]->encoding == ft_encoding_latin_1 ||
 face->charmaps[i]->encoding == ft_encoding_unicode ||
 face->charmaps[i]->encoding == ft_encoding_apple_roman) {
- error = FT_Set_Charmap(face, face->charmaps[i]);
+ error = FT_Set_Charmap (face, face->charmaps[i]);
 if (error) {
- g_printerr("could not set charmap: %s\n", get_ft_error(error));
- /* goto out; */
+ g_printerr("Could not set charmap: %s\n", get_ft_error(error));
+ goto out;
 }
 break;
 }
 }
 
- pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8,
- font_size*3*thumbstr_len/2, font_size*1.5);
+ pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
+ FALSE, /* has-alpha */
+ 8, /* bits-per-sample */
+ font_size * 3 * thumbstr_len / 2, /* width */
+ font_size * 1.5); /* height */
 if (!pixbuf) {
- g_printerr("could not create pixbuf\n");
+ g_printerr ("Could not create pixbuf\n");
 goto out;
 }
- buffer = gdk_pixbuf_get_pixels(pixbuf);
- len = gdk_pixbuf_get_rowstride(pixbuf) * gdk_pixbuf_get_height(pixbuf);
+
+ buffer = gdk_pixbuf_get_pixels (pixbuf);
+ len = gdk_pixbuf_get_rowstride (pixbuf) * gdk_pixbuf_get_height (pixbuf);
+
+ /* fill the pixbuf buffer to make it white */
 for (i = 0; i < len; i++)
 buffer[i] = 255;
 
- pen_x = font_size/2;
+ pen_x = font_size / 2;
 pen_y = font_size;
 
 if (default_thumbstr) {
@@ -349,38 +381,43 @@ main(int argc, char **argv)
 
 /* if the glyphs for those letters don't exist, pick some other
 * glyphs. */
- if (glyph_index1 == 0) glyph_index1 = MIN (65, face->num_glyphs-1);
- if (glyph_index2 == 0) glyph_index2 = MIN (97, face->num_glyphs-1);
+ if (glyph_index1 == 0)
+ glyph_index1 = MIN (65, face->num_glyphs - 1);
 
- draw_char(pixbuf, face, glyph_index1, &pen_x, &pen_y);
- draw_char(pixbuf, face, glyph_index2, &pen_x, &pen_y);
- }
- else {
- gunichar *p = thumbstr;
+ if (glyph_index2 == 0)
+ glyph_index2 = MIN (97, face->num_glyphs - 1);
+
+ draw_char (pixbuf, face, glyph_index1, &pen_x, &pen_y);
+ draw_char (pixbuf, face, glyph_index2, &pen_x, &pen_y);
+ } else {
+ const gunichar *p = thumbstr;
 FT_Select_Charmap (face, FT_ENCODING_UNICODE);
 i = 0;
+
 while (i < thumbstr_len) {
 glyph_index1 = FT_Get_Char_Index (face, *p);
- draw_char(pixbuf, face, glyph_index1, &pen_x, &pen_y);
+ draw_char (pixbuf, face, glyph_index1, &pen_x, &pen_y);
 i++;
 p++;
 }
 }
- save_pixbuf(pixbuf, arguments[1]);
- g_object_unref(pixbuf);
+
+ save_pixbuf (pixbuf, arguments[1]);
+ g_object_unref (pixbuf);
 
 totem_resources_monitor_stop ();
 
 /* freeing the face causes a crash I haven't tracked down yet */
- error = FT_Done_Face(face);
+ error = FT_Done_Face (face);
 if (error) {
- g_printerr("could not unload face: %s\n", get_ft_error(error));
+ g_printerr("Could not unload face: %s\n", get_ft_error (error));
 goto out;
 }
- error = FT_Done_FreeType(library);
+
+ error = FT_Done_FreeType (library);
 if (error) {
- g_printerr("could not finalise freetype library: %s\n",
- get_ft_error(error));
+ g_printerr ("Could not finalize freetype library: %s\n",
+ get_ft_error (error));
 goto out;
 }
author	raveit <[email protected]>	2015-08-08 20:59:06 +0200
committer	infirit <[email protected]>	2015-08-08 20:59:57 +0200
commit	11a458806bf0775b663c164dfc1403f1f3947784 (patch)
tree	9b67aeaf2f61b91d72d96e0d67261a000b5c2fb4 /font-viewer/font-thumbnailer.c
parent	0c8fd57afb370b8f9ecc2b1fc41c568dbba27a37 (diff)
download	mate-control-center-11a458806bf0775b663c164dfc1403f1f3947784.tar.bz2 mate-control-center-11a458806bf0775b663c164dfc1403f1f3947784.tar.xz