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Support (optional) freetype backend in Terminal

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This commit is contained in:
K. Lange 2018-09-21 13:17:43 +09:00
parent cb419b74f2
commit 601c927f0c
1 changed files with 94 additions and 20 deletions
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114
apps/terminal.c
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@ -27,6 +27,7 @@
#include <errno.h>
#include <pty.h>
#include <wchar.h>
#include <dlfcn.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
@ -61,11 +62,12 @@ static void usage(char * argv[]) {
"\n"
" -F --fullscreen \033[3mRun in fullscreen (background) mode.\033[0m\n"
" -b --bitmap \033[3mUse the integrated bitmap font.\033[0m\n"
" -s --scale \033[3mScale the font in SDF mode by a given amount.\033[0m\n"
" -s --scale \033[3mScale the font in antialiased mode by a given amount.\033[0m\n"
" -h --help \033[3mShow this help message.\033[0m\n"
" -x --grid \033[3mMake resizes round to nearest match for character cell size.\033[0m\n"
" -n --no-frame \033[3mDisable decorations.\033[0m\n"
" -g --geometry \033[3mSet requested terminal size WIDTHxHEIGHT\033[0m\n"
" -f --no-ft \033[3mForce disable the freetype backend.\033[0m\n"
"\n"
" This terminal emulator provides basic support for VT220 escapes and\n"
" XTerm extensions, including 256 color support and font effects.\n",
@ -85,6 +87,7 @@ static uint16_t term_height = 0; /* Height of the terminal (in cells) */
static uint16_t font_size = 16; /* Font size according to SDF library */
static uint16_t char_width = 9; /* Width of a cell in pixels */
static uint16_t char_height = 17; /* Height of a cell in pixels */
static uint16_t char_offset = 0; /* Offset of the font within the cell */
static int csr_x = 0; /* Cursor X */
static int csr_y = 0; /* Cursor Y */
static uint32_t current_fg = 7; /* Current foreground color */
@ -103,10 +106,17 @@ static uint32_t _orig_bg = 0;
static bool cursor_on = 1; /* Whether or not the cursor should be rendered */
static bool _fullscreen = 0; /* Whether or not we are running in fullscreen mode (GUI only) */
static bool _no_frame = 0; /* Whether to disable decorations or not */
static bool _use_sdf = 1; /* Whether or not to use SDF text rendering */
static bool _use_aa = 1; /* Whether or not to use best-available anti-aliased renderer */
static bool _have_freetype = 0; /* Whether freetype is available */
static bool _force_no_ft = 0; /* Whether to force disable the freetype backend */
static bool _hold_out = 0; /* state indicator on last cell ignore \n */
static bool _free_size = 1; /* Disable rounding when resized */
/** Freetype extension renderer functions */
static void (*freetype_set_font_face)(int face) = NULL;
static void (*freetype_set_font_size)(int size) = NULL;
static void (*freetype_draw_string)(gfx_context_t * ctx, int x, int y, uint32_t fg, char * string) = NULL;
static list_t * images_list = NULL;
static int menu_bar_height = 24;
@ -736,19 +746,12 @@ static void term_write_char(uint32_t val, uint16_t x, uint16_t y, uint32_t fg, u
goto _extra_stuff;
}
/* TODO: This is where a Unicode-capable rendering engine
* such as freetype should be patched in. The older
* version of this terminal included in mainline
* ToaruOS included freetype support.
*/
/* Convert other unicode characters. */
if (val > 128) {
val = ununicode(val);
}
/* Draw glyphs */
if (_use_sdf) {
if (_use_aa && !_have_freetype) {
/* Convert other unicode characters. */
if (val > 128) {
val = ununicode(val);
}
/* Draw using the Toaru SDF rendering library */
char tmp[2] = {val,0};
for (uint8_t i = 0; i < char_height; ++i) {
@ -771,7 +774,51 @@ static void term_write_char(uint32_t val, uint16_t x, uint16_t y, uint32_t fg, u
draw_sdf_string_gamma(ctx, x+decor_left_width-1, y+decor_top_height+menu_bar_height, tmp, font_size, _fg, _font, font_gamma);
}
}
} else if (_use_aa && _have_freetype) {
/* Draw using freetype extension */
if (val == 0xFFFF) { return; } /* Unicode, do not redraw here */
for (uint8_t i = 0; i < char_height; ++i) {
for (uint8_t j = 0; j < char_width; ++j) {
term_set_point(x+j,y+i,premultiply(_bg));
}
}
if (flags & ANSI_WIDE) {
for (uint8_t i = 0; i < char_height; ++i) {
for (uint8_t j = char_width; j < 2 * char_width; ++j) {
term_set_point(x+j,y+i,premultiply(_bg));
}
}
}
if (val < 32 || val == ' ') {
goto _extra_stuff;
}
#define FONT_MONOSPACE 4
#define FONT_MONOSPACE_BOLD 5
#define FONT_MONOSPACE_ITALIC 6
#define FONT_MONOSPACE_BOLD_ITALIC 7
int _font = FONT_MONOSPACE;
if (flags & ANSI_BOLD && flags & ANSI_ITALIC) {
_font = FONT_MONOSPACE_BOLD_ITALIC;
} else if (flags & ANSI_ITALIC) {
_font = FONT_MONOSPACE_ITALIC;
} else if (flags & ANSI_BOLD) {
_font = FONT_MONOSPACE_BOLD;
}
freetype_set_font_face(_font);
freetype_set_font_size(font_size);
char tmp[8];
to_eight(val, tmp);
if (_no_frame) {
freetype_draw_string(ctx, x, y + char_offset, _fg, tmp);
} else {
freetype_draw_string(ctx, x + decor_left_width, y + char_offset + decor_top_height + menu_bar_height, _fg, tmp);
}
} else {
/* Convert other unicode characters. */
if (val > 128) {
val = ununicode(val);
}
/* Draw using the bitmap font. */
uint16_t * c = large_font[val];
for (uint8_t i = 0; i < char_height; ++i) {
@ -1688,7 +1735,7 @@ static term_cell_t * copy_terminal(int old_width, int old_height, term_cell_t *
static void reinit(int send_sig) {
/* Figure out character sizes if fonts have changed. */
if (_use_sdf) {
if (_use_aa && !_have_freetype) {
char_width = 9;
char_height = 17;
font_size = 16;
@ -1697,6 +1744,19 @@ static void reinit(int send_sig) {
char_height *= font_scaling;
char_width *= font_scaling;
}
} else if (_use_aa && _have_freetype) {
font_size = 13;
char_height = 17;
char_width = 8;
char_offset = 13;
if (scale_fonts) {
/* Recalculate scaling */
font_size *= font_scaling;
char_height *= font_scaling;
char_width *= font_scaling;
char_offset *= font_scaling;
}
} else {
char_width = 9;
char_height = 20;
@ -2063,8 +2123,8 @@ static void _menu_action_hide_borders(struct MenuEntry * self) {
}
static void _menu_action_toggle_sdf(struct MenuEntry * self) {
_use_sdf = !(_use_sdf);
menu_update_title(self, _use_sdf ? "Bitmap font" : "Anti-aliased font");
_use_aa = !(_use_aa);
menu_update_title(self, _use_aa ? "Bitmap font" : "Anti-aliased font");
reinit(1);
}
@ -2116,12 +2176,13 @@ int main(int argc, char ** argv) {
{"grid", no_argument, 0, 'x'},
{"no-frame", no_argument, 0, 'n'},
{"geometry", required_argument, 0, 'g'},
{"no-ft", no_argument, 0, 'f'},
{0,0,0,0}
};
/* Read some arguments */
int index, c;
while ((c = getopt_long(argc, argv, "bhxnFls:g:", long_opts, &index)) != -1) {
while ((c = getopt_long(argc, argv, "bhxnfFls:g:", long_opts, &index)) != -1) {
if (!c) {
if (long_opts[index].flag == 0) {
c = long_opts[index].val;
@ -2134,12 +2195,15 @@ int main(int argc, char ** argv) {
case 'n':
_no_frame = 1;
break;
case 'f':
_force_no_ft = 1;
break;
case 'F':
_fullscreen = 1;
_no_frame = 1;
break;
case 'b':
_use_sdf = 0;
_use_aa = 0;
break;
case 'h':
usage(argv);
@ -2167,6 +2231,16 @@ int main(int argc, char ** argv) {
}
}
if (!_force_no_ft) {
void * freetype = dlopen("libtoaru_ext_freetype_fonts.so", 0);
if (freetype) {
_have_freetype = 1;
freetype_set_font_face = dlsym(freetype, "set_font_face");
freetype_set_font_size = dlsym(freetype, "set_font_size");
freetype_draw_string = dlsym(freetype, "draw_string");
}
}
/* Initialize the windowing library */
yctx = yutani_init();
@ -2239,7 +2313,7 @@ int main(int argc, char ** argv) {
_menu_toggle_borders_bar = menu_create_normal(NULL, NULL, _no_frame ? "Show borders" : "Hide borders", _menu_action_hide_borders);
menu_insert(m, _menu_toggle_borders_bar);
menu_insert(m, menu_create_submenu(NULL,"zoom","Set zoom..."));
menu_insert(m, menu_create_normal(NULL, NULL, _use_sdf ? "Bitmap font" : "Anti-aliased font", _menu_action_toggle_sdf));
menu_insert(m, menu_create_normal(NULL, NULL, _use_aa ? "Bitmap font" : "Anti-aliased font", _menu_action_toggle_sdf));
menu_set_insert(terminal_menu_bar.set, "view", m);
m = menu_create();