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/* -*- c-basic-offset:2; tab-width:2; indent-tabs-mode:nil -*- */
#include "ui_decsp_font.h"
#include <stdio.h>
#include <pobl/bl_mem.h> /* malloc */
#include <pobl/bl_str.h> /* strdup */
#include <pobl/bl_util.h>
/* --- static functions --- */
static void draw_check(u_char *fb, u_int width_bytes, u_int height) {
int y;
u_char check1 = 0xaa;
u_char check2 = 0x55;
for (y = 0; y < height; y++) {
if ((y & 1) == 0) {
memset(fb, check1, width_bytes);
} else {
memset(fb, check2, width_bytes);
}
fb += width_bytes;
}
}
static void draw_vline(u_char *fb, u_int width_bytes, int x, int beg_y, int end_y) {
int y;
int mask;
fb += (width_bytes * beg_y);
fb += (x / 8);
mask = (1 << (8 - (x&7) - 1));
for (y = beg_y; y <= end_y; y++) {
*fb |= mask;
fb += width_bytes;
}
}
static void draw_hline(u_char *fb, u_int width_bytes, int beg_x, int end_x, int y) {
int x;
fb += (width_bytes * y);
for (x = beg_x; x <= end_x; x++) {
fb[x/8] |= (1 << (8 - (x&7) - 1));
}
}
static void draw_diamond(u_char *fb, u_int width_bytes, u_int width, u_int height) {
int x;
int y;
u_int mod = height / 2;
for (y = 0; y < mod; y++) {
x = (width * (mod - y - 1) / mod + 1) / 2;
draw_hline(fb, width_bytes, x, width - x - 1, y);
}
for (; y < height; y++) {
x = (width * (y - mod) / mod + 1) / 2;
draw_hline(fb, width_bytes, x, width - x - 1, y);
}
}
/* --- global functions --- */
int ui_load_decsp_xfont(XFontStruct *xfont, const char *decsp_id) {
u_int width;
u_int height;
int count;
u_int glyph_size;
u_char *p;
if (sscanf(decsp_id, "decsp-%dx%d", &width, &height) != 2) {
return 0;
}
xfont->file = strdup(decsp_id);
xfont->glyph_width_bytes = (width + 7) / 8;
xfont->width = xfont->width_full = width;
xfont->height = height;
xfont->ascent = height - height / 6;
xfont->min_char_or_byte2 = 0x1;
xfont->max_char_or_byte2 = 0x1e;
xfont->num_glyphs = 30;
glyph_size = xfont->glyph_width_bytes * height;
xfont->glyphs = calloc(30, glyph_size);
xfont->glyph_offsets = calloc(30, sizeof(xfont->glyph_offsets[0]));
xfont->glyph_indeces = calloc(30, sizeof(int16_t));
xfont->ref_count = 1;
for (count = 0; count < 30; count++) {
xfont->glyph_offsets[count] = count * glyph_size;
((int16_t*)xfont->glyph_indeces)[count] = count;
}
/*
* Glyph map
*
* Used , Used , None , None , None , None , None ,
* None , None , None , Used , Used , Used , Used , Used ,
* Used , Used , Used , Used , Used , Used , Used , Used ,
* Used , Used , None , None , None , None , Used
*/
p = xfont->glyphs;
draw_diamond(p, xfont->glyph_width_bytes, width, height);
p += glyph_size;
draw_check(p, xfont->glyph_width_bytes, height);
p += (glyph_size * (0x0a - 0x01));
draw_hline(p, xfont->glyph_width_bytes, 0, width / 2 - 1, height / 2 - 1);
draw_vline(p, xfont->glyph_width_bytes, width / 2 - 1, 0, height / 2 - 1);
p += glyph_size;
draw_hline(p, xfont->glyph_width_bytes, 0, width / 2 - 1, height / 2 - 1);
draw_vline(p, xfont->glyph_width_bytes, width / 2 - 1, height / 2 - 1, height - 1);
p += glyph_size;
draw_hline(p, xfont->glyph_width_bytes, width / 2 - 1, width - 1, height / 2 - 1);
draw_vline(p, xfont->glyph_width_bytes, width / 2 - 1, height / 2 - 1, height - 1);
p += glyph_size;
draw_hline(p, xfont->glyph_width_bytes, width / 2 - 1, width - 1, height / 2 - 1);
draw_vline(p, xfont->glyph_width_bytes, width / 2 - 1, 0, height / 2 - 1);
p += glyph_size;
draw_hline(p, xfont->glyph_width_bytes, 0, width - 1, height / 2 - 1);
draw_vline(p, xfont->glyph_width_bytes, width / 2 - 1, 0, height - 1);
p += glyph_size;
draw_hline(p, xfont->glyph_width_bytes, 0, width - 1, 0);
p += glyph_size;
draw_hline(p, xfont->glyph_width_bytes, 0, width - 1, height / 4 - 1);
p += glyph_size;
draw_hline(p, xfont->glyph_width_bytes, 0, width - 1, height / 2 - 1);
p += glyph_size;
draw_hline(p, xfont->glyph_width_bytes, 0, width - 1, height * 3 / 4 - 1);
p += glyph_size;
draw_hline(p, xfont->glyph_width_bytes, 0, width - 1, height - 1);
p += glyph_size;
draw_hline(p, xfont->glyph_width_bytes, width / 2 - 1, width - 1, height / 2 - 1);
draw_vline(p, xfont->glyph_width_bytes, width / 2 - 1, 0, height - 1);
p += glyph_size;
draw_hline(p, xfont->glyph_width_bytes, 0, width / 2 - 1, height / 2 - 1);
draw_vline(p, xfont->glyph_width_bytes, width / 2 - 1, 0, height - 1);
p += glyph_size;
draw_hline(p, xfont->glyph_width_bytes, 0, width - 1, height / 2 - 1);
draw_vline(p, xfont->glyph_width_bytes, width / 2 - 1, 0, height / 2 - 1);
p += glyph_size;
draw_hline(p, xfont->glyph_width_bytes, 0, width - 1, height / 2 - 1);
draw_vline(p, xfont->glyph_width_bytes, width / 2 - 1, height / 2 - 1, height - 1);
p += glyph_size;
draw_vline(p, xfont->glyph_width_bytes, width / 2 - 1, 0, height - 1);
p += (glyph_size * (0x1d - 0x18));
draw_hline(p, xfont->glyph_width_bytes, width / 2 - 2, width / 2, height / 2 - 1);
draw_vline(p, xfont->glyph_width_bytes, width / 2 - 1, height / 2 - 2, height / 2);
return 1;
}
/* unload_pcf() in ui_font.c completely frees memory. */
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