summaryrefslogtreecommitdiff
path: root/windows/font.c
diff options
context:
space:
mode:
Diffstat (limited to 'windows/font.c')
-rw-r--r--windows/font.c208
1 files changed, 208 insertions, 0 deletions
diff --git a/windows/font.c b/windows/font.c
new file mode 100644
index 000000000..1857652e9
--- /dev/null
+++ b/windows/font.c
@@ -0,0 +1,208 @@
+/*
+ * Copyright 2005 James Bursa <bursa@users.sourceforge.net>
+ * Copyright 2008 Vincent Sanders <vince@simtec.co.uk>
+ * Copyright 2009 Mark Benjamin <netsurf-browser.org.MarkBenjamin@dfgh.net>
+ *
+ * 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 <windows.h>
+#include "css/css.h"
+#include "render/font.h"
+#include "desktop/options.h"
+#include "utils/utf8.h"
+
+#include "windows/font.h"
+#include "windows/gui.h"
+#include "windows/plot.h"
+
+#define NSWS_FONT_SCALE_HEIGHT 1.3
+#define NSWS_FONT_SCALE_WIDTH 0.45
+
+utf8_convert_ret utf8_to_font_encoding(const struct 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, "UCS-2", len, result);
+}
+
+HFONT get_font(const plot_font_style_t *style)
+{
+ char *face = NULL;
+ DWORD family;
+ switch(style->family) {
+ case PLOT_FONT_FAMILY_SERIF:
+ face = strdup(option_font_serif);
+ family = FF_ROMAN | DEFAULT_PITCH;
+ break;
+ case PLOT_FONT_FAMILY_MONOSPACE:
+ face = strdup(option_font_mono);
+ family = FF_MODERN | DEFAULT_PITCH;
+ break;
+ case PLOT_FONT_FAMILY_CURSIVE:
+ face = strdup(option_font_cursive);
+ family = FF_SCRIPT | DEFAULT_PITCH;
+ break;
+ case PLOT_FONT_FAMILY_FANTASY:
+ face = strdup(option_font_fantasy);
+ family = FF_DECORATIVE | DEFAULT_PITCH;
+ break;
+ case PLOT_FONT_FAMILY_SANS_SERIF:
+ default:
+ face = strdup(option_font_sans);
+ family = FF_SWISS | DEFAULT_PITCH;
+ break;
+ }
+
+ HFONT font = CreateFont((int)((((float)style->size) *
+ NSWS_FONT_SCALE_HEIGHT * nsws_plot_get_scale())
+ / FONT_SIZE_SCALE), /* height */
+ (int)((((float)style->size) *
+ NSWS_FONT_SCALE_WIDTH * nsws_plot_get_scale())
+ / FONT_SIZE_SCALE), /* width */
+ 0, /* escapement*/
+ 0, /* orientation */
+ style->weight,
+ (style->flags & FONTF_ITALIC) ? TRUE : FALSE,
+ FALSE, /* underline */
+ FALSE, /* strike */
+ DEFAULT_CHARSET, /* for locale */
+ OUT_DEFAULT_PRECIS, /* general 'best match' */
+ CLIP_DEFAULT_PRECIS,
+ DEFAULT_QUALITY,
+ family,
+ face /* name of font face */
+ );
+ if (face != NULL)
+ free(face);
+ if (font == NULL) {
+ if (style->family == PLOT_FONT_FAMILY_MONOSPACE)
+ font = (HFONT) GetStockObject(ANSI_FIXED_FONT);
+ else
+ font = (HFONT) GetStockObject(ANSI_VAR_FONT);
+ }
+ if (font == NULL)
+ font = (HFONT) GetStockObject(SYSTEM_FONT);
+ return font;
+}
+
+static bool nsfont_width(const plot_font_style_t *style,
+ const char *string, size_t length,
+ int *width)
+{
+ HDC hdc = GetDC(NULL);
+ HFONT font = get_font(style);
+ HFONT fontbak = SelectObject(hdc, font);
+ SIZE s;
+ if (length < 8192) { /* win 95/98/ME */
+ /* may well need to convert utf-8 to lpctstr */
+ GetTextExtentPoint32(hdc, string,
+ utf8_bounded_length(string, length), &s);
+ *width = s.cx;
+ font = SelectObject(hdc, fontbak);
+ DeleteObject(font);
+ ReleaseDC(NULL, hdc);
+ return true;
+ }
+ font = SelectObject(hdc, fontbak);
+ DeleteObject(font);
+ ReleaseDC(NULL, hdc);
+ return false;
+}
+
+/**
+ * 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 plot_font_style_t *style,
+ const char *string, size_t length,
+ int x, size_t *char_offset, int *actual_x)
+{
+ HDC hdc = GetDC(NULL);
+ HFONT font = get_font(style);
+ HFONT fontbak = SelectObject(hdc, font);
+ SIZE s;
+ int offset;
+ GetTextExtentExPoint(hdc, string, length, x, &offset, NULL, &s);
+ *char_offset = (size_t)offset;
+ nsfont_width(style, string, *char_offset, actual_x);
+
+ font = SelectObject(hdc, fontbak);
+ DeleteObject(font);
+ ReleaseDC(NULL, hdc);
+
+ 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 plot_font_style_t *style,
+ const char *string, size_t length,
+ int x, size_t *char_offset, int *actual_x)
+{
+ nsfont_position_in_string(style, string, length, x, char_offset,
+ actual_x);
+ if (*char_offset == length) {
+ printf("%s %d\n",string, (int)(*char_offset));
+ return true;
+ }
+ while ((string[*char_offset] != ' ') && (*char_offset > 0))
+ (*char_offset)--;
+ nsfont_position_in_string(style, string, *char_offset, x, char_offset,
+ actual_x);
+ return true;
+}
+
+const struct font_functions nsfont = {
+ nsfont_width,
+ nsfont_position_in_string,
+ nsfont_split
+};