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authorVincent Sanders <vince@netsurf-browser.org>2009-06-28 18:32:47 +0000
committerVincent Sanders <vince@netsurf-browser.org>2009-06-28 18:32:47 +0000
commit36b5deef09d0390e6d1a7bac9362bb8bc0008b0b (patch)
tree6651d5abb5ee71da281481acce7fcc36b3bae00c /framebuffer/font_internal.c
parentd570a80b59361ebfb8ef9ba4e64f1f74bff18855 (diff)
downloadnetsurf-36b5deef09d0390e6d1a7bac9362bb8bc0008b0b.tar.gz
netsurf-36b5deef09d0390e6d1a7bac9362bb8bc0008b0b.tar.bz2
Make framebuffer port use libnsfb
svn path=/trunk/netsurf/; revision=8122
Diffstat (limited to 'framebuffer/font_internal.c')
-rw-r--r--framebuffer/font_internal.c141
1 files changed, 141 insertions, 0 deletions
diff --git a/framebuffer/font_internal.c b/framebuffer/font_internal.c
new file mode 100644
index 000000000..ba03ecc08
--- /dev/null
+++ b/framebuffer/font_internal.c
@@ -0,0 +1,141 @@
+/*
+ * Copyright 2005 James Bursa <bursa@users.sourceforge.net>
+ * 2008 Vincent Sanders <vince@simtec.co.uk>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <inttypes.h>
+
+#include <assert.h>
+#include "css/css.h"
+#include "render/font.h"
+#include "desktop/options.h"
+#include "utils/utf8.h"
+
+#include "framebuffer/gui.h"
+#include "framebuffer/font.h"
+
+bool fb_font_init(void)
+{
+ return true;
+}
+
+const struct fb_font_desc*
+fb_get_font(const struct css_style *style)
+{
+ return &font_vga_8x16;
+}
+
+utf8_convert_ret utf8_to_font_encoding(const struct fb_font_desc* font,
+ const char *string,
+ size_t len,
+ char **result)
+{
+ return utf8_to_enc(string, font->encoding, len, result);
+
+}
+
+utf8_convert_ret utf8_to_local_encoding(const char *string,
+ size_t len,
+ char **result)
+{
+ return utf8_to_enc(string, "CP437", len, result);
+
+}
+
+static bool nsfont_width(const struct css_style *style,
+ const char *string, size_t length,
+ int *width)
+{
+ const struct fb_font_desc* fb_font = fb_get_font(style);
+ *width = fb_font->width * utf8_bounded_length(string, length);
+ return true;
+}
+
+/**
+ * Find the position in a string where an x coordinate falls.
+ *
+ * \param style css_style for this text, with style->font_size.size ==
+ * CSS_FONT_SIZE_LENGTH
+ * \param string UTF-8 string to measure
+ * \param length length of string
+ * \param x x coordinate to search for
+ * \param char_offset updated to offset in string of actual_x, [0..length]
+ * \param actual_x updated to x coordinate of character closest to x
+ * \return true on success, false on error and error reported
+ */
+
+static bool nsfont_position_in_string(const struct css_style *style,
+ const char *string, size_t length,
+ int x, size_t *char_offset, int *actual_x)
+{
+ const struct fb_font_desc* fb_font = fb_get_font(style);
+ *char_offset = x / fb_font->width;
+ if (*char_offset > length)
+ *char_offset = length;
+ *actual_x = *char_offset * fb_font->width;
+ return true;
+}
+
+
+/**
+ * Find where to split a string to make it fit a width.
+ *
+ * \param style css_style for this text, with style->font_size.size ==
+ * CSS_FONT_SIZE_LENGTH
+ * \param string UTF-8 string to measure
+ * \param length length of string
+ * \param x width available
+ * \param char_offset updated to offset in string of actual_x, [0..length]
+ * \param actual_x updated to x coordinate of character closest to x
+ * \return true on success, false on error and error reported
+ *
+ * On exit, [char_offset == 0 ||
+ * string[char_offset] == ' ' ||
+ * char_offset == length]
+ */
+
+static bool nsfont_split(const struct css_style *style,
+ const char *string, size_t length,
+ int x, size_t *char_offset, int *actual_x)
+{
+
+ const struct fb_font_desc* fb_font = fb_get_font(style);
+ *char_offset = x / fb_font->width;
+ if (*char_offset > length) {
+ *char_offset = length;
+ } else {
+ while (*char_offset > 0) {
+ if (string[*char_offset] == ' ')
+ break;
+ (*char_offset)--;
+ }
+ }
+ *actual_x = *char_offset * fb_font->width;
+ return true;
+}
+
+const struct font_functions nsfont = {
+ nsfont_width,
+ nsfont_position_in_string,
+ nsfont_split
+};
+
+/*
+ * Local Variables:
+ * c-basic-offset:8
+ * End:
+ */