font.c

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/*
 * Copyright 2008 - 2016 Chris Young <chris@unsatisfactorysoftware.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 "amiga/os3support.h"
 
#include <proto/diskfont.h>
#include <proto/exec.h>
#include <proto/graphics.h>
 
#include "utils/log.h"
#include "utils/nsoption.h"
#include "netsurf/browser.h"
#include "netsurf/layout.h"
 
#include "amiga/font.h"
#include "amiga/font_bullet.h"
#include "amiga/font_diskfont.h"
#include "amiga/font_scan.h"
 
static ULONG ami_devicedpi = 72;
static ULONG ami_xdpi = 72;
 
ULONG ami_font_dpi_get_devicedpi(void)
{
        return (ami_xdpi << 16) | ami_devicedpi;
}
 
ULONG ami_font_dpi_get_xdpi(void)
{
        return ami_xdpi;
}
 
void ami_font_setdevicedpi(int id)
{
        DisplayInfoHandle dih;
        struct DisplayInfo dinfo;
 
        if(nsoption_bool(bitmap_fonts) == true) {
                NSLOG(netsurf, INFO,
                      "WARNING: Using diskfont.library for text. Forcing DPI to 72.");
                nsoption_set_int(screen_ydpi, 72);
        }
 
        ULONG ydpi = nsoption_int(screen_ydpi);
        ULONG xdpi = nsoption_int(screen_ydpi);
        browser_set_dpi(nsoption_int(screen_ydpi));
 
        if(id && (nsoption_int(monitor_aspect_x) != 0) && (nsoption_int(monitor_aspect_y) != 0))
        {
                if((dih = FindDisplayInfo(id)))
                {
                        if(GetDisplayInfoData(dih, &dinfo, sizeof(struct DisplayInfo),
                                DTAG_DISP, 0))
                        {
                                int xres = dinfo.Resolution.x;
                                int yres = dinfo.Resolution.y;
 
                                if((nsoption_int(monitor_aspect_x) != 4) || (nsoption_int(monitor_aspect_y) != 3))
                                {
                                        /* AmigaOS sees 4:3 modes as square in the DisplayInfo database,
                                         * so we correct other modes to "4:3 equiv" here. */
                                        xres = (xres * nsoption_int(monitor_aspect_x)) / 4;
                                        yres = (yres * nsoption_int(monitor_aspect_y)) / 3;
                                }
 
                                xdpi = (yres * ydpi) / xres;
 
                                NSLOG(netsurf, INFO,
                                      "XDPI = %ld, YDPI = %ld (DisplayInfo resolution %d x %d, corrected %d x %d)",
                                      xdpi,
                                      ydpi,
                                      dinfo.Resolution.x,
                                      dinfo.Resolution.y,
                                      xres,
                                      yres);
                        }
                }
        }
 
        ami_xdpi = xdpi;
        ami_devicedpi = (xdpi << 16) | ydpi;
}
 
/* The below are simple font routines which should not be used for page rendering */
 
struct TextFont *ami_font_open_disk_font(struct TextAttr *tattr)
{
        struct TextFont *tfont = OpenDiskFont(tattr);
        return tfont;
}
 
void ami_font_close_disk_font(struct TextFont *tfont)
{
        CloseFont(tfont);
}
 
/* Font initialisation */
void ami_font_init(void)
{
        if(nsoption_bool(bitmap_fonts) == false) {
                ami_font_bullet_init();
        } else {
                ami_font_diskfont_init();
        }
}
 
void ami_font_fini(void)
{
        if(nsoption_bool(bitmap_fonts) == false) {
                ami_font_bullet_fini();
        } else {
                ami_font_diskfont_fini();
        }
}
 
/* Stub entry points */
static nserror ami_font_width(const plot_font_style_t *fstyle,
                const char *string, size_t length,
                int *width)
{
        if(__builtin_expect(ami_nsfont == NULL, 0)) return false;
        return ami_nsfont->width(fstyle, string, length, width);
}
 
static nserror ami_font_position(const plot_font_style_t *fstyle,
                const char *string, size_t length,
                int x, size_t *char_offset, int *actual_x)
{
        if(__builtin_expect(ami_nsfont == NULL, 0)) return false;
        return ami_nsfont->posn(fstyle, string, length, x, char_offset, actual_x);
}
 
static nserror ami_font_split(const plot_font_style_t *fstyle,
                const char *string, size_t length,
                int x, size_t *char_offset, int *actual_x)
{
        if(__builtin_expect(ami_nsfont == NULL, 0)) return false;
        return ami_nsfont->split(fstyle, string, length, x, char_offset, actual_x);
}
 
static struct gui_layout_table layout_table = {
        .width = ami_font_width,
        .position = ami_font_position,
        .split = ami_font_split,
};
 
struct gui_layout_table *ami_layout_table = &layout_table;