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Diffstat (limited to 'frontends/atari/font.c')
| -rw-r--r-- | frontends/atari/font.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/frontends/atari/font.c b/frontends/atari/font.c new file mode 100644 index 000000000..cb0c574ea --- /dev/null +++ b/frontends/atari/font.c @@ -0,0 +1,156 @@ +/* + * Copyright 2010 Ole Loots <ole@monochrom.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 <stdbool.h> +#include <stdlib.h> + +#include "utils/utf8.h" +#include "utils/log.h" +#include "utils/nsoption.h" +#include "desktop/gui_layout.h" +#include "desktop/mouse.h" +#include "desktop/plotters.h" + +#include "atari/gui.h" +#include "atari/plot/fontplot.h" +#include "atari/plot/plot.h" +#include "atari/findfile.h" +#include "atari/font.h" + +extern FONT_PLOTTER fplotter; + + +/** + * Find the position in a string where an x coordinate falls. + * + * \param[in] fstyle style for this text + * \param[in] string UTF-8 string to measure + * \param[in] length length of string, in bytes + * \param[in] x coordinate to search for + * \param[out] char_offset updated to offset in string of actual_x, [0..length] + * \param[out] actual_x updated to x coordinate of character closest to x + * \return NSERROR_OK and char_offset and actual_x updated or appropriate error code on faliure + */ +static nserror +atari_font_position(const plot_font_style_t *fstyle, + const char *string, + size_t length, + int x, + size_t *char_offset, + int *actual_x) +{ + float scale = plot_get_scale(); + + if (scale != 1.0) { + plot_font_style_t newstyle = *fstyle; + newstyle.size = (int)((float)fstyle->size*scale); + fplotter->pixel_pos(fplotter, &newstyle, string, length, x, + char_offset, actual_x); + } else { + fplotter->pixel_pos(fplotter, fstyle, string, length, x, + char_offset, actual_x); + } + + return NSERROR_OK; +} + + +/** + * Find where to split a string to make it fit a width. + * + * \param[in] fstyle style for this text + * \param[in] string UTF-8 string to measure + * \param[in] length length of string, in bytes + * \param[in] x width available + * \param[out] char_offset updated to offset in string of actual_x, [1..length] + * \param[out] actual_x updated to x coordinate of character closest to x + * \return NSERROR_OK or appropriate error code on faliure + * + * On exit, char_offset indicates first character after split point. + * + * \note char_offset of 0 must never be returned. + * + * Returns: + * char_offset giving split point closest to x, where actual_x <= x + * else + * char_offset giving split point closest to x, where actual_x > x + * + * Returning char_offset == length means no split possible + */ +static nserror +atari_font_split(const plot_font_style_t *fstyle, + const char *string, + size_t length, + int x, + size_t *char_offset, + int *actual_x) +{ + float scale = plot_get_scale(); + + if (scale != 1.0) { + plot_font_style_t newstyle = *fstyle; + newstyle.size = (int)((float)fstyle->size*scale); + fplotter->str_split(fplotter, &newstyle, string, length, x, + char_offset, actual_x); + } else { + fplotter->str_split(fplotter, fstyle, string, length, x, + char_offset, actual_x); + } + + return NSERROR_OK; +} + + +/** + * Measure the width of a string. + * + * \param[in] fstyle plot style for this text + * \param[in] string UTF-8 string to measure + * \param[in] length length of string, in bytes + * \param[out] width updated to width of string[0..length) + * \return NSERROR_OK and width updated or appropriate error code on faliure + */ +static nserror +atari_font_width(const plot_font_style_t *fstyle, + const char *str, + size_t length, + int * width) +{ + float scale = plot_get_scale(); + + if (scale != 1.0) { + plot_font_style_t newstyle = *fstyle; + newstyle.size = (int)((float)fstyle->size*scale); + fplotter->str_width(fplotter, &newstyle, str, length, width); + } else { + fplotter->str_width(fplotter, fstyle, str, length, width); + } + + return NSERROR_OK; +} + + +static struct gui_layout_table layout_table = { + .width = atari_font_width, + .position = atari_font_position, + .split = atari_font_split, +}; + +struct gui_layout_table *atari_layout_table = &layout_table; |