From 9214a3c0e8101391f3e6c8533af9e4f4444f1db4 Mon Sep 17 00:00:00 2001 From: raveit65 Date: Sun, 8 Jan 2017 17:14:36 +0100 Subject: Font-viewer: thumbnailer port to cairo rendering taken from: https://git.gnome.org/browse/gnome-font-viewer/commit/?id=6fffe82 --- font-viewer/Makefile.am | 2 +- font-viewer/font-thumbnailer.c | 380 +++++++++++++++-------------------------- 2 files changed, 137 insertions(+), 245 deletions(-) diff --git a/font-viewer/Makefile.am b/font-viewer/Makefile.am index 5ed07b75..ef123991 100644 --- a/font-viewer/Makefile.am +++ b/font-viewer/Makefile.am @@ -8,7 +8,7 @@ font_loader_SOURCES = \ sushi-font-loader.h \ sushi-font-loader.c -mate_thumbnail_font_LDADD = $(MATECC_CAPPLETS_LIBS) $(FONT_VIEWER_LIBS) +mate_thumbnail_font_LDADD = $(MATECC_CAPPLETS_LIBS) -lm $(FONT_VIEWER_LIBS) mate_thumbnail_font_SOURCES = \ $(font_loader_SOURCES) \ font-thumbnailer.c \ diff --git a/font-viewer/font-thumbnailer.c b/font-viewer/font-thumbnailer.c index c7fe58bb..d2d8f759 100644 --- a/font-viewer/font-thumbnailer.c +++ b/font-viewer/font-thumbnailer.c @@ -1,9 +1,9 @@ /* -*- mode: C; c-basic-offset: 4 -*- */ - /* * font-thumbnailer: a thumbnailer for font files, using FreeType * * Copyright (C) 2002-2003 James Henstridge + * Copyright (C) 2012 Cosimo Cecchi * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -27,12 +27,16 @@ #include #include #include +#include #include FT_FREETYPE_H +#include #include #include #include +#include + #include "sushi-font-loader.h" #include "totem-resources.h" @@ -50,194 +54,110 @@ get_ft_error (FT_Error error) } } -#define FONT_SIZE 64 -#define PAD_PIXELS 4 +#define THUMB_SIZE 128 +#define PADDING_VERTICAL 2 +#define PADDING_HORIZONTAL 4 -static void -draw_bitmap (GdkPixbuf *pixbuf, - FT_Bitmap *bitmap, - gint off_x, - gint off_y) +static gboolean +check_font_contain_text (FT_Face face, + const gchar *text) { - 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); - - 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 = 255 - ((pixel >> (7 - i % 8)) & 0x1) * 255; - break; - case ft_pixel_mode_grays: - 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; - } - } -} + gunichar *string; + glong len, idx, map; + FT_CharMap charmap; + gboolean retval; -static void -draw_char (GdkPixbuf *pixbuf, - FT_Face face, - FT_UInt glyph_index, - gint *pen_x, - gint *pen_y) -{ - FT_Error error; - FT_GlyphSlot slot; + string = g_utf8_to_ucs4_fast (text, -1, &len); - slot = face->glyph; + for (map = 0; map < face->num_charmaps; map++) { + charmap = face->charmaps[map]; + FT_Set_Charmap (face, charmap); - 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)); - return; - } - - 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)); - return; - } + retval = TRUE; - draw_bitmap (pixbuf, &slot->bitmap, - *pen_x + slot->bitmap_left, - *pen_y - slot->bitmap_top); + for (idx = 0; idx < len; idx++) { + gunichar c = string[idx]; - *pen_x += slot->advance.x >> 6; -} - -static void -save_pixbuf (GdkPixbuf *pixbuf, - const gchar *filename) -{ - guchar *buffer; - gint p_width, p_height, p_rowstride; - gint i, j; - 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); - - 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; - - seen_pixel = (buffer[offset] != 0xff || - buffer[offset + 1] != 0xff || - buffer[offset + 2] != 0xff); - - if (seen_pixel) - break; - } - - if (seen_pixel) - break; + if (!FT_Get_Char_Index (face, c)) { + retval = FALSE; + break; + } } - 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; + if (retval) + break; + } - for (j = 0; j < p_height; j++) { - gint offset = j * p_rowstride + 3 * i; + g_free (string); - seen_pixel = (buffer[offset] != 0xff || - buffer[offset + 1] != 0xff || - buffer[offset + 2] != 0xff); - - if (seen_pixel) - break; - } + return retval; +} - if (seen_pixel) - break; - } +static gchar * +check_for_ascii_glyph_numbers (FT_Face face, + gboolean *found_ascii) +{ + GString *ascii_string, *string; + gulong c; + guint glyph, found = 0; - trim_right = MAX (trim_left, i); - trim_right = MIN (trim_right + PAD_PIXELS, p_width - 1); + string = g_string_new (NULL); + ascii_string = g_string_new (NULL); + *found_ascii = FALSE; - for (j = 0; j < p_height; j++) { - gboolean seen_pixel = FALSE; + c = FT_Get_First_Char (face, &glyph); - for (i = 0; i < p_width; i++) { - gint offset = j * p_rowstride + 3 * i; + do { + if (glyph == 65 || glyph == 97) { + g_string_append_unichar (ascii_string, (gunichar) c); + found++; + } - seen_pixel = (buffer[offset] != 0xff || - buffer[offset + 1] != 0xff || - buffer[offset + 2] != 0xff); + if (found == 2) + break; - if (seen_pixel) - break; - } + g_string_append_unichar (string, (gunichar) c); + c = FT_Get_Next_Char (face, c, &glyph); + } while (glyph != 0); - if (seen_pixel) - break; + if (found == 2) { + *found_ascii = TRUE; + g_string_free (string, TRUE); + return g_string_free (ascii_string, FALSE); + } else { + g_string_free (ascii_string, TRUE); + return g_string_free (string, FALSE); } +} - trim_top = MIN (p_height, j); - trim_top = MAX (trim_top - PAD_PIXELS, 0); +static gchar * +build_fallback_thumbstr (FT_Face face) +{ + gchar *chars; + gint idx, total_chars; + GString *retval; + gchar *ptr, *end; + gboolean found_ascii; - for (j = p_height - 1; j >= trim_top; j--) { - gboolean seen_pixel = FALSE; + chars = check_for_ascii_glyph_numbers (face, &found_ascii); - for (i = 0; i < p_width; i++) { - gint offset = j * p_rowstride + 3 * i; + if (found_ascii) + return chars; - seen_pixel = (buffer[offset] != 0xff || - buffer[offset + 1] != 0xff || - buffer[offset + 2] != 0xff); + idx = 0; + retval = g_string_new (NULL); + total_chars = g_utf8_strlen (chars, -1); - if (seen_pixel) - break; - } + while (idx < 2) { + total_chars = (gint) floor (total_chars / 2.0); + ptr = g_utf8_offset_to_pointer (chars, total_chars); + end = g_utf8_find_next_char (ptr, NULL); - if (seen_pixel) - break; + g_string_append_len (retval, ptr, end - ptr); + idx++; } - 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); + return g_string_free (retval, FALSE); } int @@ -247,14 +167,8 @@ main (int argc, FT_Error error; FT_Library library; FT_Face face; - FT_UInt glyph_index1, glyph_index2; GFile *file; - GdkPixbuf *pixbuf; - guchar *buffer; - gint i, len, pen_x, pen_y; - gunichar *thumbstr = NULL; - glong thumbstr_len = 2; - gint font_size = FONT_SIZE; + gint font_size, thumb_size = THUMB_SIZE; gchar *thumbstr_utf8 = NULL, *help, *uri; gchar **arguments = NULL; GOptionContext *context; @@ -262,12 +176,20 @@ main (int argc, gchar *contents = NULL; gboolean retval, default_thumbstr = TRUE; gint rv = 1; + GdkRGBA white = { 1.0, 1.0, 1.0, 1.0 }; + GdkRGBA black = { 0.0, 0.0, 0.0, 1.0 }; + cairo_surface_t *surface; + cairo_t *cr; + cairo_text_extents_t text_extents; + cairo_font_face_t *font; + gchar *str; + gdouble scale, scale_x, scale_y; const GOptionEntry options[] = { { "text", 't', 0, G_OPTION_ARG_STRING, &thumbstr_utf8, N_("Text to thumbnail (default: Aa)"), N_("TEXT") }, - { "size", 's', 0, G_OPTION_ARG_INT, &font_size, - N_("Font size (default: 64)"), N_("SIZE") }, + { "size", 's', 0, G_OPTION_ARG_INT, &thumb_size, + N_("Thumbnail size (default: 128)"), N_("SIZE") }, { G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &arguments, NULL, N_("FONT-FILE OUTPUT-FILE") }, { NULL } @@ -279,6 +201,8 @@ main (int argc, setlocale (LC_ALL, ""); + g_type_init (); + context = g_option_context_new (NULL); g_option_context_add_main_entries (context, options, GETTEXT_PACKAGE); @@ -301,20 +225,9 @@ main (int argc, g_option_context_free (context); - if (thumbstr_utf8 != NULL) { - /* build ucs4 version of string to thumbnail */ - gerror = NULL; - thumbstr = g_utf8_to_ucs4 (thumbstr_utf8, strlen (thumbstr_utf8), - NULL, &thumbstr_len, &gerror); + if (thumbstr_utf8 != NULL) default_thumbstr = FALSE; - if (gerror != NULL) { - g_printerr ("Failed to convert: %s\n", gerror->message); - g_error_free (gerror); - goto out; - } - } - error = FT_Init_FreeType (&library); if (error) { g_printerr("Could not initialise freetype: %s\n", get_ft_error (error)); @@ -338,78 +251,57 @@ main (int argc, g_free (uri); - 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; - } - - 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]); - if (error) { - g_printerr("Could not set charmap: %s\n", get_ft_error(error)); - goto out; - } - break; - } - } - - 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"); - goto out; + if (default_thumbstr) { + if (check_font_contain_text (face, "Aa")) + str = g_strdup ("Aa"); + else + str = build_fallback_thumbstr (face); + } else { + str = thumbstr_utf8; } - 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; + surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, + thumb_size, thumb_size); + cr = cairo_create (surface); - pen_x = font_size / 2; - pen_y = font_size; + gdk_cairo_set_source_rgba (cr, &white); + cairo_paint (cr); - if (default_thumbstr) { - glyph_index1 = FT_Get_Char_Index (face, 'A'); - glyph_index2 = FT_Get_Char_Index (face, 'a'); + font = cairo_ft_font_face_create_for_ft_face (face, 0); + cairo_set_font_face (cr, font); + cairo_font_face_destroy (font); - /* 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); + font_size = thumb_size - 2 * PADDING_VERTICAL; + cairo_set_font_size (cr, font_size); + cairo_text_extents (cr, str, &text_extents); - if (glyph_index2 == 0) - glyph_index2 = MIN (97, face->num_glyphs - 1); + if ((text_extents.width) > (thumb_size - 2 * PADDING_HORIZONTAL)) { + scale_x = (gdouble) (thumb_size - 2 * PADDING_HORIZONTAL) / (text_extents.width); + } else { + scale_x = 1.0; + } - draw_char (pixbuf, face, glyph_index1, &pen_x, &pen_y); - draw_char (pixbuf, face, glyph_index2, &pen_x, &pen_y); + if ((text_extents.height) > (thumb_size - 2 * PADDING_VERTICAL)) { + scale_y = (gdouble) (thumb_size - 2 * PADDING_VERTICAL) / (text_extents.height); } 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); - i++; - p++; - } + scale_y = 1.0; } - save_pixbuf (pixbuf, arguments[1]); - g_object_unref (pixbuf); + scale = MIN (scale_x, scale_y); + cairo_scale (cr, scale, scale); + cairo_translate (cr, + PADDING_HORIZONTAL - text_extents.x_bearing + (thumb_size - scale * text_extents.width) / 2.0, + PADDING_VERTICAL - text_extents.y_bearing + (thumb_size - scale * text_extents.height) / 2.0); + + gdk_cairo_set_source_rgba (cr, &black); + cairo_show_text (cr, str); + cairo_destroy (cr); + + cairo_surface_write_to_png (surface, arguments[1]); + cairo_surface_destroy (surface); totem_resources_monitor_stop (); - /* freeing the face causes a crash I haven't tracked down yet */ error = FT_Done_Face (face); if (error) { g_printerr("Could not unload face: %s\n", get_ft_error (error)); @@ -428,9 +320,9 @@ main (int argc, out: g_strfreev (arguments); - g_free (thumbstr); - g_free (thumbstr_utf8); + g_free (str); g_free (contents); return rv; } + -- cgit v1.2.1