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dxx-rebirth/similar/2d/font.cpp

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/*
* Portions of this file are copyright Rebirth contributors and licensed as
* described in COPYING.txt.
* Portions of this file are copyright Parallax Software and licensed
* according to the Parallax license below.
* See COPYING.txt for license details.
THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
*/
/*
*
* Graphical routines for drawing fonts.
*
*/
#include <algorithm>
#include <memory>
#include <stdexcept>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef macintosh
#include <fcntl.h>
#endif
#include "u_mem.h"
#include "gr.h"
#include "grdef.h"
#include "dxxerror.h"
#include "common/2d/bitmap.h"
#include "makesig.h"
#include "physfsx.h"
#include "gamefont.h"
#include "byteutil.h"
#include "console.h"
#include "config.h"
#if DXX_USE_OGL
#include "ogl_init.h"
#endif
#include "compiler-range_for.h"
#include "compiler-make_unique.h"
#include "partial_range.h"
#include <array>
static font_x_scale_float FONTSCALE_X()
{
return FNTScaleX.operator float();
}
static auto FONTSCALE_Y(const int &y)
{
return font_scaled_float<'y'>(FNTScaleY * y);
}
#define MAX_OPEN_FONTS 50
namespace {
constexpr std::integral_constant<uint8_t, 255> kerndata_terminator{};
}
namespace dcx {
//list of open fonts, for use (for now) for palette remapping
static std::array<grs_font *, MAX_OPEN_FONTS> open_font;
#define BITS_TO_BYTES(x) (((x)+7)>>3)
static int gr_internal_string_clipped(grs_canvas &, const grs_font &cv_font, int x, int y, const char *s);
static int gr_internal_string_clipped_m(grs_canvas &, const grs_font &cv_font, int x, int y, const char *s);
static const uint8_t *find_kern_entry(const grs_font &font, const uint8_t first, const uint8_t second)
{
auto p = font.ft_kerndata;
while (*p != kerndata_terminator)
if (p[0]==first && p[1]==second)
return p;
else p+=3;
return NULL;
}
//takes the character AFTER being offset into font
namespace {
class font_character_extent
{
const unsigned r;
public:
font_character_extent(const grs_font &cv_font) :
r(cv_font.ft_maxchar - cv_font.ft_minchar)
{
}
bool operator()(const unsigned c) const
{
return c <= r;
}
};
template <typename T>
struct get_char_width_result
{
T width, spacing;
};
/* Floating form never uses width. This specialization allows the
* compiler to recognize width as dead, shortening
* get_char_width<float>.
*/
template <>
struct get_char_width_result<float>
{
float spacing;
get_char_width_result(float, float s) :
spacing(s)
{
}
};
}
//takes the character BEFORE being offset into current font
template <typename T>
static get_char_width_result<T> get_char_width(const grs_font &cv_font, const uint8_t c, const uint8_t c2)
{
const unsigned letter = c - cv_font.ft_minchar;
const auto ft_flags = cv_font.ft_flags;
const auto proportional = ft_flags & FT_PROPORTIONAL;
const auto &&fontscale_x = FONTSCALE_X();
const auto &&INFONT = font_character_extent(cv_font);
if (!INFONT(letter)) { //not in font, draw as space
return {0, static_cast<T>(proportional ? fontscale_x(cv_font.ft_w) / 2 : cv_font.ft_w)};
}
const T width = proportional ? fontscale_x(cv_font.ft_widths[letter]).operator float() : cv_font.ft_w;
if (ft_flags & FT_KERNED)
{
if (!(c2==0 || c2=='\n')) {
const unsigned letter2 = c2 - cv_font.ft_minchar;
if (INFONT(letter2)) {
const auto p = find_kern_entry(cv_font, letter, letter2);
if (p)
return {width, static_cast<T>(fontscale_x(p[2]))};
}
}
}
return {width, width};
}
static int get_centered_x(const grs_canvas &canvas, const grs_font &cv_font, const char *s)
{
float w;
for (w = 0.; const char c = *s; ++s)
{
if (c == '\n')
break;
if (c <= 0x06)
{
if (c <= 0x03)
s++;
continue;//skip color codes.
}
w += get_char_width<float>(cv_font, c, s[1]).spacing;
}
return (canvas.cv_bitmap.bm_w - w) / 2;
}
//hack to allow color codes to be embedded in strings -MPM
//note we subtract one from color, since 255 is "transparent" so it'll never be used, and 0 would otherwise end the string.
//function must already have orig_color var set (or they could be passed as args...)
//perhaps some sort of recursive orig_color type thing would be better, but that would be way too much trouble for little gain
constexpr std::integral_constant<int, 1> gr_message_color_level{};
#define CHECK_EMBEDDED_COLORS() if ((*text_ptr >= 0x01) && (*text_ptr <= 0x02)) { \
text_ptr++; \
if (*text_ptr){ \
if (gr_message_color_level >= *(text_ptr-1)) \
canvas.cv_font_fg_color = static_cast<uint8_t>(*text_ptr); \
text_ptr++; \
} \
} \
else if (*text_ptr == 0x03) \
{ \
underline = 1; \
text_ptr++; \
} \
else if ((*text_ptr >= 0x04) && (*text_ptr <= 0x06)){ \
if (gr_message_color_level >= *text_ptr - 3) \
canvas.cv_font_fg_color= static_cast<uint8_t>(orig_color); \
text_ptr++; \
}
template <bool masked_draws_background>
static int gr_internal_string0_template(grs_canvas &canvas, const grs_font &cv_font, const int x, int y, const char *const s)
{
const auto &&INFONT = font_character_extent(cv_font);
const auto ft_flags = cv_font.ft_flags;
const auto proportional = ft_flags & FT_PROPORTIONAL;
const auto cv_font_bg_color = canvas.cv_font_bg_color;
int skip_lines = 0;
unsigned int VideoOffset1;
//to allow easy reseting to default string color with colored strings -MPM
const auto orig_color = canvas.cv_font_fg_color;
VideoOffset1 = y * canvas.cv_bitmap.bm_rowsize + x;
auto next_row = s;
while (next_row != NULL )
{
const auto text_ptr1 = next_row;
next_row = NULL;
if (x==0x8000) { //centered
int xx = get_centered_x(canvas, cv_font, text_ptr1);
VideoOffset1 = y * canvas.cv_bitmap.bm_rowsize + xx;
}
for (int r=0; r < cv_font.ft_h; ++r)
{
auto text_ptr = text_ptr1;
unsigned VideoOffset = VideoOffset1;
for (; const uint8_t c0 = *text_ptr; ++text_ptr)
{
if (c0 == '\n')
{
next_row = &text_ptr[1];
break;
}
if (c0 == CC_COLOR)
{
canvas.cv_font_fg_color = static_cast<uint8_t>(*++text_ptr);
continue;
}
if (c0 == CC_LSPACING)
{
skip_lines = *++text_ptr - '0';
continue;
}
auto underline = unlikely(c0 == CC_UNDERLINE)
? ++text_ptr, r == cv_font.ft_baseline + 2 || r == cv_font.ft_baseline + 3
: 0;
const uint8_t c = *text_ptr;
const auto &result = get_char_width<int>(cv_font, c, text_ptr[1]);
const auto &width = result.width;
const auto &spacing = result.spacing;
const unsigned letter = c - cv_font.ft_minchar;
if (masked_draws_background)
{
if (!INFONT(letter)) { //not in font, draw as space
VideoOffset += spacing;
text_ptr++;
continue;
}
}
else
{
if (!INFONT(letter) || c <= 0x06) //not in font, draw as space
{
CHECK_EMBEDDED_COLORS() else{
VideoOffset += spacing;
text_ptr++;
}
continue;
}
}
if (width)
{
auto data = &canvas.cv_bitmap.get_bitmap_data()[VideoOffset];
const auto cv_font_fg_color = canvas.cv_font_fg_color;
if (underline)
{
std::fill_n(data, width, cv_font_fg_color);
}
else
{
auto fp = proportional ? cv_font.ft_chars[letter] : &cv_font.ft_data[letter * BITS_TO_BYTES(width) * cv_font.ft_h];
fp += BITS_TO_BYTES(width)*r;
/* Setting bits=0 is a dead store, but is necessary to
* prevent -Og -Wuninitialized from issuing a bogus
* warning. -Og does not see that bits_remaining=0
* guarantees that bits will be initialized from *fp before
* it is read.
*/
uint8_t bits_remaining = 0, bits = 0;
for (uint_fast32_t i = width; i--; ++data, --bits_remaining)
{
if (!bits_remaining)
{
bits = *fp++;
bits_remaining = 8;
}
const auto bit_enabled = (bits & 0x80);
bits <<= 1;
if (!masked_draws_background)
{
if (!bit_enabled)
continue;
}
*data = bit_enabled ? cv_font_fg_color : cv_font_bg_color;
}
}
}
VideoOffset += spacing;
}
VideoOffset1 += canvas.cv_bitmap.bm_rowsize;
y++;
}
y += skip_lines;
VideoOffset1 += canvas.cv_bitmap.bm_rowsize * skip_lines;
skip_lines = 0;
}
return 0;
}
static int gr_internal_string0(grs_canvas &canvas, const grs_font &cv_font, const int x, const int y, const char *const s)
{
return gr_internal_string0_template<true>(canvas, cv_font, x, y, s);
}
static int gr_internal_string0m(grs_canvas &canvas, const grs_font &cv_font, const int x, const int y, const char *const s)
{
return gr_internal_string0_template<false>(canvas, cv_font, x, y, s);
}
#if !DXX_USE_OGL
static int gr_internal_color_string(grs_canvas &canvas, const grs_font &cv_font, const int x, const int y, const char *const s)
{
//a bitmap for the character
grs_bitmap char_bm = {};
char_bm.set_type(bm_mode::linear);
char_bm.set_flags(BM_FLAG_TRANSPARENT);
const char *text_ptr, *next_row, *text_ptr1;
int letter;
int xx,yy;
const auto &&INFONT = font_character_extent(cv_font);
char_bm.bm_h = cv_font.ft_h; //set height for chars of this font
next_row = s;
yy = y;
const auto &&fspacy1 = FSPACY(1);
while (next_row != NULL)
{
text_ptr1 = next_row;
next_row = NULL;
text_ptr = text_ptr1;
xx = x;
if (xx==0x8000) //centered
xx = get_centered_x(canvas, cv_font, text_ptr);
while (*text_ptr)
{
if (*text_ptr == '\n' )
{
next_row = &text_ptr[1];
yy += cv_font.ft_h + fspacy1;
break;
}
letter = static_cast<uint8_t>(*text_ptr) - cv_font.ft_minchar;
const auto &result = get_char_width<int>(cv_font, text_ptr[0], text_ptr[1]);
const auto &width = result.width;
const auto &spacing = result.spacing;
if (!INFONT(letter)) { //not in font, draw as space
xx += spacing;
text_ptr++;
continue;
}
const auto fp = (cv_font.ft_flags & FT_PROPORTIONAL)
? cv_font.ft_chars[letter]
: &cv_font.ft_data[letter * BITS_TO_BYTES(width) * cv_font.ft_h];
gr_init_bitmap(char_bm, bm_mode::linear, 0, 0, width, cv_font.ft_h, width, fp);
gr_bitmapm(canvas, xx, yy, char_bm);
xx += spacing;
text_ptr++;
}
}
return 0;
}
#else //OGL
static int get_font_total_width(const grs_font &font)
{
if (font.ft_flags & FT_PROPORTIONAL)
{
int w=0;
range_for (const auto v, unchecked_partial_range(font.ft_widths, static_cast<unsigned>(font.ft_maxchar - font.ft_minchar) + 1))
{
if (v < 0)
throw std::underflow_error("negative width");
w += v;
}
return w;
}else{
return font.ft_w*(font.ft_maxchar-font.ft_minchar+1);
}
}
static void ogl_font_choose_size(grs_font * font,int gap,int *rw,int *rh){
int nchars = font->ft_maxchar-font->ft_minchar+1;
int r,x,y,nc=0,smallest=999999,smallr=-1,tries;
int smallprop=10000;
int w;
for (int h=32;h<=256;h*=2){
// h=pow2ize(font->ft_h*rows+gap*(rows-1));
if (font->ft_h>h)continue;
r=(h/(font->ft_h+gap));
w=pow2ize((get_font_total_width(*font)+(nchars-r)*gap)/r);
tries=0;
do {
if (tries)
w=pow2ize(w+1);
if(tries>3){
break;
}
nc=0;
y=0;
while(y+font->ft_h<=h){
x=0;
while (x<w){
if (nc==nchars)
break;
if (font->ft_flags & FT_PROPORTIONAL){
if (x+font->ft_widths[nc]+gap>w)break;
x+=font->ft_widths[nc++]+gap;
}else{
if (x+font->ft_w+gap>w)break;
x+=font->ft_w+gap;
nc++;
}
}
if (nc==nchars)
break;
y+=font->ft_h+gap;
}
tries++;
}while(nc!=nchars);
if (nc!=nchars)
continue;
if (w*h==smallest){//this gives squarer sizes priority (ie, 128x128 would be better than 512*32)
if (w>=h){
if (w/h<smallprop){
smallprop=w/h;
smallest++;//hack
}
}else{
if (h/w<smallprop){
smallprop=h/w;
smallest++;//hack
}
}
}
if (w*h<smallest){
smallr=1;
smallest=w*h;
*rw=w;
*rh=h;
}
}
if (smallr<=0)
Error("Could not fit font?\n");
}
static void ogl_init_font(grs_font * font)
{
int oglflags = OGL_FLAG_ALPHA;
int nchars = font->ft_maxchar-font->ft_minchar+1;
int w,h,tw,th,curx=0,cury=0;
int gap=1; // x/y offset between the chars so we can filter
th = tw = 0xffff;
ogl_font_choose_size(font,gap,&tw,&th);
{
RAIIdmem<uint8_t[]> data;
const unsigned length = tw * th;
MALLOC(data, uint8_t, length);
std::fill_n(data.get(), length, TRANSPARENCY_COLOR); // map the whole data with transparency so we won't have borders if using gap
gr_init_main_bitmap(font->ft_parent_bitmap, bm_mode::linear, 0, 0, tw, th, tw, std::move(data));
}
gr_set_transparent(font->ft_parent_bitmap, 1);
if (!(font->ft_flags & FT_COLOR))
oglflags |= OGL_FLAG_NOCOLOR;
ogl_init_texture(*(font->ft_parent_bitmap.gltexture = ogl_get_free_texture()), tw, th, oglflags); // have to init the gltexture here so the subbitmaps will find it.
font->ft_bitmaps = make_unique<grs_bitmap[]>(nchars);
h=font->ft_h;
for(int i=0;i<nchars;i++)
{
if (font->ft_flags & FT_PROPORTIONAL)
w=font->ft_widths[i];
else
w=font->ft_w;
if (w<1 || w>256)
continue;
if (curx+w+gap>tw)
{
cury+=h+gap;
curx=0;
}
if (cury+h>th)
Error("font doesn't really fit (%i/%i)?\n",i,nchars);
if (font->ft_flags & FT_COLOR)
{
const auto fp = (font->ft_flags & FT_PROPORTIONAL)
? font->ft_chars[i]
: font->ft_data + i * w*h;
for (int y=0;y<h;y++)
{
for (int x=0;x<w;x++)
{
font->ft_parent_bitmap.get_bitmap_data()[curx+x+(cury+y)*tw] = fp[x+y*w];
// Let's call this a HACK:
// If we filter the fonts, the sliders will be messed up as the border pixels will have an
// alpha value while filtering. So the slider bitmaps will not look "connected".
// To prevent this, duplicate the first/last pixel-row with a 1-pixel offset.
if (gap && i >= 99 && i <= 102)
{
// See which bitmaps need left/right shifts:
// 99 = SLIDER_LEFT - shift RIGHT
// 100 = SLIDER_RIGHT - shift LEFT
// 101 = SLIDER_MIDDLE - shift LEFT+RIGHT
// 102 = SLIDER_MARKER - shift RIGHT
// shift left border
if (x==0 && i != 99 && i != 102)
font->ft_parent_bitmap.get_bitmap_data()[(curx+x+(cury+y)*tw)-1] = fp[x+y*w];
// shift right border
if (x==w-1 && i != 100)
font->ft_parent_bitmap.get_bitmap_data()[(curx+x+(cury+y)*tw)+1] = fp[x+y*w];
}
}
}
}
else
{
int BitMask,bits=0,white=gr_find_closest_color(63,63,63);
auto fp = (font->ft_flags & FT_PROPORTIONAL)
? font->ft_chars[i]
: font->ft_data + i * BITS_TO_BYTES(w)*h;
for (int y=0;y<h;y++){
BitMask=0;
for (int x=0; x< w; x++ )
{
if (BitMask==0) {
bits = *fp++;
BitMask = 0x80;
}
if (bits & BitMask)
font->ft_parent_bitmap.get_bitmap_data()[curx+x+(cury+y)*tw] = white;
else
font->ft_parent_bitmap.get_bitmap_data()[curx+x+(cury+y)*tw] = 255;
BitMask >>= 1;
}
}
}
gr_init_sub_bitmap(font->ft_bitmaps[i],font->ft_parent_bitmap,curx,cury,w,h);
curx+=w+gap;
}
ogl_loadbmtexture_f(font->ft_parent_bitmap, CGameCfg.TexFilt, 0, 0);
}
static int ogl_internal_string(grs_canvas &canvas, const grs_font &cv_font, const int x, const int y, const char *const s)
{
const char * text_ptr, * next_row, * text_ptr1;
int letter;
int xx,yy;
int orig_color = canvas.cv_font_fg_color;//to allow easy reseting to default string color with colored strings -MPM
int underline;
next_row = s;
yy = y;
if (grd_curscreen->sc_canvas.cv_bitmap.get_type() != bm_mode::ogl)
Error("carp.\n");
const auto &&fspacy1 = FSPACY(1);
const auto &&INFONT = font_character_extent(cv_font);
const auto &&fontscale_x = FONTSCALE_X();
const auto &&FONTSCALE_Y_ft_h = FONTSCALE_Y(cv_font.ft_h);
ogl_colors colors;
while (next_row != NULL)
{
text_ptr1 = next_row;
next_row = NULL;
text_ptr = text_ptr1;
xx = x;
if (xx==0x8000) //centered
xx = get_centered_x(canvas, cv_font, text_ptr);
while (*text_ptr)
{
if (*text_ptr == '\n' )
{
next_row = &text_ptr[1];
yy += FONTSCALE_Y_ft_h + fspacy1;
break;
}
letter = static_cast<uint8_t>(*text_ptr) - cv_font.ft_minchar;
const auto &result = get_char_width<int>(cv_font, text_ptr[0], text_ptr[1]);
const auto &spacing = result.spacing;
underline = 0;
if (!INFONT(letter) || static_cast<uint8_t>(*text_ptr) <= 0x06) //not in font, draw as space
{
CHECK_EMBEDDED_COLORS() else{
xx += spacing;
text_ptr++;
}
if (underline)
{
const uint8_t color = canvas.cv_font_fg_color;
gr_rect(canvas, xx, yy + cv_font.ft_baseline + 2, xx + cv_font.ft_w, yy + cv_font.ft_baseline + 3, color);
}
continue;
}
const auto ft_w = (cv_font.ft_flags & FT_PROPORTIONAL)
? cv_font.ft_widths[letter]
: cv_font.ft_w;
ogl_ubitmapm_cs(canvas, xx, yy, fontscale_x(ft_w), FONTSCALE_Y_ft_h, cv_font.ft_bitmaps[letter], (cv_font.ft_flags & FT_COLOR) ? colors.white : (canvas.cv_bitmap.get_type() == bm_mode::ogl) ? colors.init(canvas.cv_font_fg_color) : throw std::runtime_error("non-color string to non-ogl dest"), F1_0);
xx += spacing;
text_ptr++;
}
}
return 0;
}
#define gr_internal_color_string ogl_internal_string
#endif //OGL
void gr_string(grs_canvas &canvas, const grs_font &cv_font, const int x, const int y, const char *const s)
{
int w, h;
gr_get_string_size(cv_font, s, &w, &h, nullptr);
gr_string(canvas, cv_font, x, y, s, w, h);
}
static void gr_ustring_mono(grs_canvas &canvas, const grs_font &cv_font, const int x, const int y, const char *const s)
{
switch (canvas.cv_bitmap.get_type())
{
case bm_mode::linear:
if (canvas.cv_font_bg_color == -1)
gr_internal_string0m(canvas, cv_font, x, y, s);
else
gr_internal_string0(canvas, cv_font, x, y, s);
}
}
void gr_string(grs_canvas &canvas, const grs_font &cv_font, const int x, const int y, const char *const s, const int w, const int h)
{
if (y + h < 0)
return;
const auto bm_h = canvas.cv_bitmap.bm_h;
if (y > bm_h)
return;
const auto bm_w = canvas.cv_bitmap.bm_w;
int xw = w;
if ( x == 0x8000 ) {
// for x, since this will be centered, only look at
// width.
} else {
if (x > bm_w)
return;
xw += x;
if (xw < 0)
return;
}
if (
#if DXX_USE_OGL
canvas.cv_bitmap.get_type() == bm_mode::ogl ||
#endif
cv_font.ft_flags & FT_COLOR)
{
gr_internal_color_string(canvas, cv_font, x, y, s);
return;
}
// Partially clipped...
if (!(y < 0 ||
x < 0 ||
xw > bm_w ||
y + h > bm_h))
{
gr_ustring_mono(canvas, cv_font, x, y, s);
return;
}
if (canvas.cv_font_bg_color == -1)
{
gr_internal_string_clipped_m(canvas, cv_font, x, y, s);
return;
}
gr_internal_string_clipped(canvas, cv_font, x, y, s);
}
void gr_ustring(grs_canvas &canvas, const grs_font &cv_font, const int x, const int y, const char *const s)
{
#if DXX_USE_OGL
if (canvas.cv_bitmap.get_type() == bm_mode::ogl)
{
ogl_internal_string(canvas, cv_font, x, y, s);
return;
}
#endif
if (canvas.cv_font->ft_flags & FT_COLOR) {
gr_internal_color_string(canvas, cv_font, x, y, s);
}
else
gr_ustring_mono(canvas, cv_font, x, y, s);
}
int gr_get_string_height(const grs_font &cv_font, const unsigned lines)
{
const auto fontscale_y = FONTSCALE_Y(cv_font.ft_h);
return static_cast<int>(fontscale_y + (lines * (fontscale_y + FSPACY(1))));
}
void gr_get_string_size(const grs_font &cv_font, const char *s, int *const string_width, int *const string_height, int *const average_width)
{
gr_get_string_size(cv_font, s, string_width, string_height, average_width, UINT_MAX);
}
void gr_get_string_size(const grs_font &cv_font, const char *s, int *const string_width, int *const string_height, int *const average_width, const unsigned max_chars_per_line)
{
float longest_width=0.0,string_width_f=0.0;
unsigned lines = 0;
if (average_width)
*average_width = cv_font.ft_w;
if (!string_width && !string_height)
return;
if (s)
{
unsigned remaining_chars_this_line = max_chars_per_line;
while (*s)
{
if (*s == '\n')
{
if (longest_width < string_width_f)
longest_width = string_width_f;
string_width_f = 0;
const auto os = s;
while (*++s == '\n')
{
}
lines += s - os;
if (!*s)
break;
remaining_chars_this_line = max_chars_per_line;
}
const auto &result = get_char_width<float>(cv_font, s[0], s[1]);
const auto &spacing = result.spacing;
string_width_f += spacing;
s++;
if (!--remaining_chars_this_line)
break;
}
}
if (string_width)
*string_width = std::max(longest_width, string_width_f);
if (string_height)
*string_height = gr_get_string_height(cv_font, lines);
}
std::pair<const char *, unsigned> gr_get_string_wrap(const grs_font &cv_font, const char *s, unsigned limit)
{
assert(s);
float string_width_f=0.0;
const float limit_f = limit;
for (uint8_t c; (c = *s); ++s)
{
const auto &&spacing = get_char_width<float>(cv_font, c, s[1]).spacing;
const float next_string_width = string_width_f + spacing;
if (next_string_width >= limit_f)
break;
string_width_f = next_string_width;
}
return {s, static_cast<unsigned>(string_width_f)};
}
template <void (&F)(grs_canvas &, const grs_font &, int, int, const char *)>
void (gr_printt)(grs_canvas &canvas, const grs_font &cv_font, const int x, const int y, const char *const format, ...)
{
char buffer[1000];
va_list args;
va_start(args, format );
vsnprintf(buffer, sizeof(buffer), format, args);
va_end(args);
F(canvas, cv_font, x, y, buffer);
}
template void gr_printt<gr_string>(grs_canvas &, const grs_font &, int, int, const char *, ...);
template void gr_printt<gr_ustring>(grs_canvas &, const grs_font &, int, int, const char *, ...);
void gr_close_font(std::unique_ptr<grs_font> font)
{
if (font)
{
//find font in list
if (!(font->ft_flags & FT_COLOR))
return;
auto e = end(open_font);
auto i = std::find(begin(open_font), e, font.get());
if (i == e)
throw std::logic_error("closing non-open font");
*i = nullptr;
}
}
//remap a font, re-reading its data & palette
static void gr_remap_font(grs_font *font, const char *fontname);
//remap (by re-reading) all the color fonts
void gr_remap_color_fonts()
{
range_for (auto font, open_font)
{
if (font)
gr_remap_font(font, &font->ft_filename[0]);
}
}
/*
* reads a grs_font structure from a PHYSFS_File
*/
static void grs_font_read(grs_font *gf, PHYSFS_File *fp)
{
gf->ft_w = PHYSFSX_readShort(fp);
gf->ft_h = PHYSFSX_readShort(fp);
gf->ft_flags = PHYSFSX_readShort(fp);
gf->ft_baseline = PHYSFSX_readShort(fp);
gf->ft_minchar = PHYSFSX_readByte(fp);
gf->ft_maxchar = PHYSFSX_readByte(fp);
PHYSFSX_readShort(fp);
gf->ft_data = reinterpret_cast<uint8_t *>(static_cast<uintptr_t>(PHYSFSX_readInt(fp)) - GRS_FONT_SIZE);
PHYSFSX_readInt(fp);
gf->ft_widths = reinterpret_cast<int16_t *>(static_cast<uintptr_t>(PHYSFSX_readInt(fp)) - GRS_FONT_SIZE);
gf->ft_kerndata = reinterpret_cast<uint8_t *>(static_cast<uintptr_t>(PHYSFSX_readInt(fp)) - GRS_FONT_SIZE);
}
static std::unique_ptr<grs_font> gr_internal_init_font(const char *fontname)
{
const uint8_t *ptr;
uint8_t *ft_data;
struct {
std::array<char, 4> magic;
unsigned datasize; //size up to (but not including) palette
} file_header;
auto fontfile = PHYSFSX_openReadBuffered(fontname);
if (!fontfile) {
con_printf(CON_VERBOSE, "Can't open font file %s", fontname);
return {};
}
static_assert(sizeof(file_header) == 8, "file header size error");
if (PHYSFS_read(fontfile, &file_header, sizeof(file_header), 1) != 1 ||
memcmp(file_header.magic.data(), "PSFN", 4) ||
(file_header.datasize = INTEL_INT(file_header.datasize)) < GRS_FONT_SIZE)
{
con_printf(CON_NORMAL, "Invalid header in font file %s", fontname);
return {};
}
file_header.datasize -= GRS_FONT_SIZE; // subtract the size of the header.
const auto &datasize = file_header.datasize;
auto font = make_unique<grs_font>();
grs_font_read(font.get(), fontfile);
const unsigned nchars = font->ft_maxchar - font->ft_minchar + 1;
std::size_t ft_chars_storage = (font->ft_flags & FT_PROPORTIONAL)
? sizeof(uint8_t *) * nchars
: 0;
auto ft_allocdata = make_unique<uint8_t[]>(datasize + ft_chars_storage);
const auto font_data = &ft_allocdata[ft_chars_storage];
if (PHYSFS_read(fontfile, font_data, 1, datasize) != datasize)
{
con_printf(CON_URGENT, "Insufficient data in font file %s", fontname);
return {};
}
if (font->ft_flags & FT_PROPORTIONAL) {
const auto offset_widths = reinterpret_cast<uintptr_t>(font->ft_widths);
auto w = reinterpret_cast<short *>(&font_data[offset_widths]);
if (offset_widths >= datasize || offset_widths + (nchars * sizeof(*w)) >= datasize)
{
con_printf(CON_URGENT, "Missing widths in font file %s", fontname);
return {};
}
font->ft_widths = w;
const auto offset_data = reinterpret_cast<uintptr_t>(font->ft_data);
if (offset_data >= datasize)
{
con_printf(CON_URGENT, "Missing data in font file %s", fontname);
return {};
}
font->ft_data = ptr = ft_data = &font_data[offset_data];
const auto ft_chars = reinterpret_cast<const uint8_t **>(ft_allocdata.get());
font->ft_chars = reinterpret_cast<const uint8_t *const *>(ft_chars);
const unsigned is_color = font->ft_flags & FT_COLOR;
const unsigned ft_h = font->ft_h;
std::generate_n(ft_chars, nchars, [is_color, ft_h, &w, &ptr]{
const unsigned s = INTEL_SHORT(*w);
if (words_bigendian)
*w = static_cast<uint16_t>(s);
++w;
const auto r = ptr;
ptr += ft_h * (is_color ? s : BITS_TO_BYTES(s));
return r;
});
} else {
font->ft_data = ft_data = font_data;
font->ft_widths = NULL;
ptr = font->ft_data + (nchars * font->ft_w * font->ft_h);
}
if (font->ft_flags & FT_KERNED)
{
const auto offset_kerndata = reinterpret_cast<uintptr_t>(font->ft_kerndata);
if (datasize <= offset_kerndata)
{
con_printf(CON_URGENT, "Missing kerndata in font file %s", fontname);
return {};
}
const auto begin_kerndata = reinterpret_cast<const unsigned char *>(&font_data[offset_kerndata]);
const auto end_font_data = &font_data[datasize - ((datasize - offset_kerndata + 2) % 3)];
for (auto cur_kerndata = begin_kerndata;; cur_kerndata += 3)
{
if (cur_kerndata == end_font_data)
{
con_printf(CON_URGENT, "Unterminated kerndata in font file %s", fontname);
return {};
}
if (*cur_kerndata == kerndata_terminator)
break;
}
font->ft_kerndata = begin_kerndata;
}
else
font->ft_kerndata = nullptr;
if (font->ft_flags & FT_COLOR) { //remap palette
palette_array_t palette;
std::array<uint8_t, 256> colormap;
/* `freq` exists so that decode_data can write to it, but it is
* otherwise unused. `decode_data` is not guaranteed to write
* to every element, so `freq` must not be read without first
* adding an initialization step.
*/
std::array<bool, 256> freq;
PHYSFS_read(fontfile,&palette[0],sizeof(palette[0]),palette.size()); //read the palette
build_colormap_good(palette, colormap);
colormap[TRANSPARENCY_COLOR] = TRANSPARENCY_COLOR; // changed from colormap[255] = 255 to this for macintosh
decode_data(ft_data, ptr - font->ft_data, colormap, freq );
}
fontfile.reset();
//set curcanv vars
auto &ft_filename = font->ft_filename;
font->ft_allocdata = move(ft_allocdata);
strncpy(&ft_filename[0], fontname, ft_filename.size());
return font;
}
grs_font_ptr gr_init_font(grs_canvas &canvas, const char *fontname)
{
auto font = gr_internal_init_font(fontname);
if (!font)
return {};
canvas.cv_font = font.get();
canvas.cv_font_fg_color = 0;
canvas.cv_font_bg_color = 0;
if (font->ft_flags & FT_COLOR)
{
auto e = end(open_font);
auto i = std::find(begin(open_font), e, static_cast<grs_font *>(nullptr));
if (i == e)
throw std::logic_error("too many open fonts");
*i = font.get();
}
#if DXX_USE_OGL
ogl_init_font(font.get());
#endif
return grs_font_ptr(font.release());
}
//remap a font by re-reading its data & palette
void gr_remap_font(grs_font *font, const char *fontname)
{
auto n = gr_internal_init_font(fontname);
if (!n)
return;
if (!(n->ft_flags & FT_COLOR))
return;
*font = std::move(*n.get());
#if DXX_USE_OGL
ogl_init_font(font);
#endif
}
void gr_set_curfont(grs_canvas &canvas, const grs_font *n)
{
canvas.cv_font = n;
}
void gr_set_fontcolor(grs_canvas &canvas, const int fg_color, const int bg_color)
{
canvas.cv_font_fg_color = fg_color;
canvas.cv_font_bg_color = bg_color;
}
template <bool masked_draws_background>
static int gr_internal_string_clipped_template(grs_canvas &canvas, const grs_font &cv_font, int x, int y, const char *const s)
{
const char * text_ptr, * next_row, * text_ptr1;
int letter;
int x1 = x, last_x;
next_row = s;
const auto &&INFONT = font_character_extent(cv_font);
const auto ft_flags = cv_font.ft_flags;
const auto proportional = ft_flags & FT_PROPORTIONAL;
const auto cv_font_bg_color = canvas.cv_font_bg_color;
while (next_row != NULL )
{
text_ptr1 = next_row;
next_row = NULL;
x = x1;
if (x==0x8000) //centered
x = get_centered_x(canvas, cv_font, text_ptr1);
last_x = x;
for (int r=0; r < cv_font.ft_h; r++) {
text_ptr = text_ptr1;
x = last_x;
for (; const uint8_t c0 = *text_ptr; ++text_ptr)
{
if (c0 == '\n')
{
next_row = &text_ptr[1];
break;
}
if (c0 == CC_COLOR)
{
canvas.cv_font_fg_color = static_cast<uint8_t>(*++text_ptr);
continue;
}
if (c0 == CC_LSPACING)
{
Int3(); // Warning: skip lines not supported for clipped strings.
text_ptr += 1;
continue;
}
const auto underline = unlikely(c0 == CC_UNDERLINE)
? ++text_ptr, r == cv_font.ft_baseline + 2 || r == cv_font.ft_baseline + 3
: 0;
const uint8_t c = *text_ptr;
const auto &result = get_char_width<int>(cv_font, c, text_ptr[1]);
const auto &width = result.width;
const auto &spacing = result.spacing;
letter = c - cv_font.ft_minchar;
if (!INFONT(letter)) { //not in font, draw as space
x += spacing;
continue;
}
const auto cv_font_fg_color = canvas.cv_font_fg_color;
auto color = cv_font_fg_color;
if (width)
{
if (underline) {
for (uint_fast32_t i = width; i--;)
{
gr_pixel(canvas.cv_bitmap, x++, y, color);
}
} else {
auto fp = proportional ? cv_font.ft_chars[letter] : cv_font.ft_data + letter * BITS_TO_BYTES(width) * cv_font.ft_h;
fp += BITS_TO_BYTES(width)*r;
/* Setting bits=0 is a dead store, but is necessary to
* prevent -Og -Wuninitialized from issuing a bogus
* warning. -Og does not see that bits_remaining=0
* guarantees that bits will be initialized from *fp before
* it is read.
*/
uint8_t bits_remaining = 0, bits = 0;
for (uint_fast32_t i = width; i--; ++x, --bits_remaining)
{
if (!bits_remaining)
{
bits = *fp++;
bits_remaining = 8;
}
const auto bit_enabled = (bits & 0x80);
bits <<= 1;
if (masked_draws_background)
color = bit_enabled ? cv_font_fg_color : cv_font_bg_color;
else
{
if (!bit_enabled)
continue;
}
gr_pixel(canvas.cv_bitmap, x, y, color);
}
}
}
x += spacing-width; //for kerning
}
y++;
}
}
return 0;
}
static int gr_internal_string_clipped_m(grs_canvas &canvas, const grs_font &cv_font, const int x, const int y, const char *const s)
{
return gr_internal_string_clipped_template<true>(canvas, cv_font, x, y, s);
}
static int gr_internal_string_clipped(grs_canvas &canvas, const grs_font &cv_font, const int x, const int y, const char *const s)
{
return gr_internal_string_clipped_template<false>(canvas, cv_font, x, y, s);
}
}
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