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font_driver.c
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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2017 - Daniel De Matteis
*
* RetroArch 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <math.h>
#ifdef HAVE_CONFIG_H
#include "../config.h"
#endif
#include "font_driver.h"
#include "video_thread_wrapper.h"
#include "../retroarch.h"
#include "../verbosity.h"
static const font_renderer_driver_t *font_backends[] = {
#ifdef HAVE_FREETYPE
&freetype_font_renderer,
#endif
#if defined(__APPLE__) && defined(HAVE_CORETEXT)
&coretext_font_renderer,
#endif
#ifdef HAVE_STB_FONT
#if defined(VITA) || defined(WIIU) || defined(ANDROID) || (defined(_WIN32) && !defined(_XBOX) && !defined(_MSC_VER) && _MSC_VER >= 1400) || (defined(_WIN32) && !defined(_XBOX) && defined(_MSC_VER)) || defined(__CELLOS_LV2__) || defined(HAVE_LIBNX) || defined(__linux__) || defined (HAVE_EMSCRIPTEN) || defined(__APPLE__) || defined(HAVE_ODROIDGO2)
&stb_unicode_font_renderer,
#else
&stb_font_renderer,
#endif
#endif
&bitmap_font_renderer,
NULL
};
static void *video_font_driver = NULL;
int font_renderer_create_default(
const font_renderer_driver_t **drv,
void **handle,
const char *font_path, unsigned font_size)
{
unsigned i;
for (i = 0; font_backends[i]; i++)
{
const char *path = font_path;
if (!path)
path = font_backends[i]->get_default_font();
if (!path)
continue;
*handle = font_backends[i]->init(path, font_size);
if (*handle)
{
RARCH_LOG("[Font]: Using font rendering backend: %s.\n",
font_backends[i]->ident);
*drv = font_backends[i];
return 1;
}
else
RARCH_ERR("Failed to create rendering backend: %s.\n",
font_backends[i]->ident);
}
*drv = NULL;
*handle = NULL;
return 0;
}
#ifdef HAVE_D3D8
static const font_renderer_t *d3d8_font_backends[] = {
#if defined(_XBOX1)
&d3d_xdk1_font,
#endif
NULL
};
static bool d3d8_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; i < ARRAY_SIZE(d3d8_font_backends); i++)
{
void *data = d3d8_font_backends[i] ? d3d8_font_backends[i]->init(
video_data, font_path, font_size,
is_threaded) : NULL;
if (!data)
continue;
*font_driver = d3d8_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#ifdef HAVE_D3D9
static const font_renderer_t *d3d9_font_backends[] = {
#if defined(_WIN32) && defined(HAVE_D3DX)
&d3d_win32_font,
#endif
NULL
};
static bool d3d9_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; i < ARRAY_SIZE(d3d9_font_backends); i++)
{
void *data = d3d9_font_backends[i] ? d3d9_font_backends[i]->init(
video_data, font_path, font_size,
is_threaded) : NULL;
if (!data)
continue;
*font_driver = d3d9_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#ifdef HAVE_OPENGL1
static const font_renderer_t *gl1_font_backends[] = {
&gl1_raster_font,
NULL,
};
static bool gl1_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; gl1_font_backends[i]; i++)
{
void *data = gl1_font_backends[i]->init(
video_data, font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = gl1_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#if defined(HAVE_OPENGL)
static const font_renderer_t *gl_font_backends[] = {
&gl_raster_font,
NULL,
};
static bool gl_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; gl_font_backends[i]; i++)
{
void *data = gl_font_backends[i]->init(
video_data, font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = gl_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#ifdef HAVE_OPENGL_CORE
static const font_renderer_t *gl_core_font_backends[] = {
&gl_core_raster_font,
NULL,
};
static bool gl_core_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; gl_core_font_backends[i]; i++)
{
void *data = gl_core_font_backends[i]->init(
video_data, font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = gl_core_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#ifdef HAVE_CACA
static const font_renderer_t *caca_font_backends[] = {
&caca_font,
NULL,
};
static bool caca_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; caca_font_backends[i]; i++)
{
void *data = caca_font_backends[i]->init(
video_data, font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = caca_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#ifdef HAVE_SIXEL
static const font_renderer_t *sixel_font_backends[] = {
&sixel_font,
NULL,
};
static bool sixel_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; sixel_font_backends[i]; i++)
{
void *data = sixel_font_backends[i]->init(
video_data, font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = sixel_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#ifdef DJGPP
static const font_renderer_t *vga_font_backends[] = {
&vga_font,
NULL,
};
static bool vga_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; vga_font_backends[i]; i++)
{
void *data = vga_font_backends[i]->init(
video_data, font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = vga_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#ifdef HAVE_GDI
#if defined(_WIN32) && !defined(_XBOX) && !defined(__WINRT__)
static const font_renderer_t *gdi_font_backends[] = {
&gdi_font,
NULL,
};
static bool gdi_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; gdi_font_backends[i]; i++)
{
void *data = gdi_font_backends[i]->init(
video_data, font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = gdi_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#endif
#ifdef HAVE_VULKAN
static const font_renderer_t *vulkan_font_backends[] = {
&vulkan_raster_font,
NULL,
};
static bool vulkan_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; vulkan_font_backends[i]; i++)
{
void *data = vulkan_font_backends[i]->init(video_data,
font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = vulkan_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#ifdef HAVE_METAL
static const font_renderer_t *metal_font_backends[] = {
&metal_raster_font,
NULL,
};
static bool metal_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; metal_font_backends[i]; i++)
{
void *data = metal_font_backends[i]->init(video_data,
font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = metal_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#ifdef HAVE_D3D10
static const font_renderer_t *d3d10_font_backends[] = {
&d3d10_font,
NULL,
};
static bool d3d10_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; d3d10_font_backends[i]; i++)
{
void *data = d3d10_font_backends[i]->init(video_data,
font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = d3d10_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#ifdef HAVE_D3D11
static const font_renderer_t *d3d11_font_backends[] = {
&d3d11_font,
NULL,
};
static bool d3d11_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; d3d11_font_backends[i]; i++)
{
void *data = d3d11_font_backends[i]->init(video_data,
font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = d3d11_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#ifdef HAVE_D3D12
static const font_renderer_t *d3d12_font_backends[] = {
&d3d12_font,
NULL,
};
static bool d3d12_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; d3d12_font_backends[i]; i++)
{
void *data = d3d12_font_backends[i]->init(video_data,
font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = d3d12_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#ifdef PS2
static const font_renderer_t *ps2_font_backends[] = {
&ps2_font
};
static bool ps2_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; ps2_font_backends[i]; i++)
{
void *data = ps2_font_backends[i]->init(
video_data, font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = ps2_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#ifdef HAVE_VITA2D
static const font_renderer_t *vita2d_font_backends[] = {
&vita2d_vita_font
};
static bool vita2d_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; vita2d_font_backends[i]; i++)
{
void *data = vita2d_font_backends[i]->init(
video_data, font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = vita2d_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#ifdef _3DS
static const font_renderer_t *ctr_font_backends[] = {
&ctr_font
};
static bool ctr_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; ctr_font_backends[i]; i++)
{
void *data = ctr_font_backends[i]->init(
video_data, font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = ctr_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#ifdef HAVE_LIBNX
static const font_renderer_t *switch_font_backends[] = {
&switch_font,
NULL
};
static bool switch_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; switch_font_backends[i]; i++)
{
void *data = switch_font_backends[i]->init(
video_data, font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = switch_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
#ifdef WIIU
static const font_renderer_t *wiiu_font_backends[] = {
&wiiu_font,
NULL
};
static bool wiiu_font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path,
float font_size, bool is_threaded)
{
unsigned i;
for (i = 0; wiiu_font_backends[i]; i++)
{
void *data = wiiu_font_backends[i]->init(
video_data, font_path, font_size,
is_threaded);
if (!data)
continue;
*font_driver = wiiu_font_backends[i];
*font_handle = data;
return true;
}
return false;
}
#endif
static bool font_init_first(
const void **font_driver, void **font_handle,
void *video_data, const char *font_path, float font_size,
enum font_driver_render_api api, bool is_threaded)
{
if (font_path && !font_path[0])
font_path = NULL;
switch (api)
{
#ifdef HAVE_OPENGL1
case FONT_DRIVER_RENDER_OPENGL1_API:
return gl1_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef HAVE_OPENGL
case FONT_DRIVER_RENDER_OPENGL_API:
return gl_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef HAVE_OPENGL_CORE
case FONT_DRIVER_RENDER_OPENGL_CORE_API:
return gl_core_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef HAVE_VULKAN
case FONT_DRIVER_RENDER_VULKAN_API:
return vulkan_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef HAVE_METAL
case FONT_DRIVER_RENDER_METAL_API:
return metal_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef HAVE_D3D8
case FONT_DRIVER_RENDER_D3D8_API:
return d3d8_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef HAVE_D3D9
case FONT_DRIVER_RENDER_D3D9_API:
return d3d9_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef HAVE_D3D10
case FONT_DRIVER_RENDER_D3D10_API:
return d3d10_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef HAVE_D3D11
case FONT_DRIVER_RENDER_D3D11_API:
return d3d11_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef HAVE_D3D12
case FONT_DRIVER_RENDER_D3D12_API:
return d3d12_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef HAVE_VITA2D
case FONT_DRIVER_RENDER_VITA2D:
return vita2d_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef PS2
case FONT_DRIVER_RENDER_PS2:
return ps2_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef _3DS
case FONT_DRIVER_RENDER_CTR:
return ctr_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef WIIU
case FONT_DRIVER_RENDER_WIIU:
return wiiu_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef HAVE_CACA
case FONT_DRIVER_RENDER_CACA:
return caca_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef HAVE_SIXEL
case FONT_DRIVER_RENDER_SIXEL:
return sixel_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef HAVE_LIBNX
case FONT_DRIVER_RENDER_SWITCH:
return switch_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#ifdef HAVE_GDI
#if defined(_WIN32) && !defined(_XBOX) && !defined(__WINRT__)
case FONT_DRIVER_RENDER_GDI:
return gdi_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
#endif
#ifdef DJGPP
case FONT_DRIVER_RENDER_VGA:
return vga_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#endif
case FONT_DRIVER_RENDER_DONT_CARE:
/* TODO/FIXME - lookup graphics driver's 'API' */
break;
default:
break;
}
return false;
}
#ifdef HAVE_LANGEXTRA
/* ACII: 0xxxxxxx (c & 0x80) == 0x00
* other start: 11xxxxxx (c & 0xC0) == 0xC0
* other cont: 10xxxxxx (c & 0xC0) == 0x80
* Neutral :
* 0020 - 002F : 001xxxxx (c & 0xE0) == 0x20
* Arabic:
* 0600 - 07FF : 11011xxx (c & 0xF8) == 0xD8 (2 bytes)
* 0800 - 08FF : 11100000 101000xx c == 0xE0 && (c1 & 0xAC) == 0xA0 (3 bytes) */
/* clang-format off */
#define IS_ASCII(p) ((*(p)&0x80) == 0x00)
#define IS_MBSTART(p) ((*(p)&0xC0) == 0xC0)
#define IS_MBCONT(p) ((*(p)&0xC0) == 0x80)
#define IS_DIR_NEUTRAL(p) ((*(p)&0xE0) == 0x20)
#define IS_ARABIC0(p) ((*(p)&0xF8) == 0xD8)
#define IS_ARABIC1(p) ((*(p) == 0xE0) && ((*((p) + 1) & 0xAC) == 0xA0))
#define IS_ARABIC(p) (IS_ARABIC0(p) || IS_ARABIC1(p))
#define IS_RTL(p) IS_ARABIC(p)
/* 0x0620 to 0x064F */
static const unsigned arabic_shape_map[0x50 - 0x20][0x4] = {
{ 0 }, /* 0x0620 */
{ 0xFE80 },
{ 0xFE81, 0xFE82 },
{ 0xFE83, 0xFE84 },
{ 0xFE85, 0xFE86 },
{ 0xFE87, 0xFE88 },
{ 0xFE89, 0xFE8A, 0xFE8B, 0xFE8C },
{ 0xFE8D, 0xFE8E },
{ 0xFE8F, 0xFE90, 0xFE91, 0xFE92 },
{ 0xFE93, 0xFE94 },
{ 0xFE95, 0xFE96, 0xFE97, 0xFE98 },
{ 0xFE99, 0xFE9A, 0xFE9B, 0xFE9C },
{ 0xFE9D, 0xFE9E, 0xFE9F, 0xFEA0 },
{ 0xFEA1, 0xFEA2, 0xFEA3, 0xFEA4 },
{ 0xFEA5, 0xFEA6, 0xFEA7, 0xFEA8 },
{ 0xFEA9, 0xFEAA },
{ 0xFEAB, 0xFEAC }, /* 0x0630 */
{ 0xFEAD, 0xFEAE },
{ 0xFEAF, 0xFEB0 },
{ 0xFEB1, 0xFEB2, 0xFEB3, 0xFEB4 },
{ 0xFEB5, 0xFEB6, 0xFEB7, 0xFEB8 },
{ 0xFEB9, 0xFEBA, 0xFEBB, 0xFEBC },
{ 0xFEBD, 0xFEBE, 0xFEBF, 0xFEC0 },
{ 0xFEC1, 0xFEC2, 0xFEC3, 0xFEC4 },
{ 0xFEC5, 0xFEC6, 0xFEC7, 0xFEC8 },
{ 0xFEC9, 0xFECA, 0xFECB, 0xFECC },
{ 0xFECD, 0xFECE, 0xFECF, 0xFED0 },
{ 0 },
{ 0 },
{ 0 },
{ 0 },
{ 0 },
{ 0 },
{ 0xFED1, 0xFED2, 0xFED3, 0xFED4 }, /* 0x0640 */
{ 0xFED5, 0xFED6, 0xFED7, 0xFED8 },
{ 0xFED9, 0xFEDA, 0xFEDB, 0xFEDC },
{ 0xFEDD, 0xFEDE, 0xFEDF, 0xFEE0 },
{ 0xFEE1, 0xFEE2, 0xFEE3, 0xFEE4 },
{ 0xFEE5, 0xFEE6, 0xFEE7, 0xFEE8 },
{ 0xFEE9, 0xFEEA, 0xFEEB, 0xFEEC },
{ 0xFEED, 0xFEEE },
{ 0xFEEF, 0xFEF0, 0xFBE8, 0xFBE9 },
{ 0xFEF1, 0xFEF2, 0xFEF3, 0xFEF4 },
};
/* clang-format on */
static INLINE unsigned font_get_replacement(const char* src, const char* start)
{
if ((*src & 0xFC) == 0xD8) /* 0x0600 to 0x06FF */
{
unsigned result = 0;
bool prev_connected = false;
bool next_connected = false;
unsigned char id = ((unsigned char)src[0] << 6) | ((unsigned char)src[1] & 0x3F);
const char* prev1 = src - 2;
const char* prev2 = src - 4;
if (id < 0x21 || id > 0x4A)
return 0;
if (prev2 < start)
{
prev2 = NULL;
if (prev1 < start)
prev1 = NULL;
}
if (prev1 && (*prev1 & 0xFC) == 0xD8)
{
unsigned char prev1_id = 0;
if (prev1)
prev1_id = ((unsigned char)prev1[0] << 6) | ((unsigned char)prev1[1] & 0x3F);
if (prev1_id == 0x44)
{
unsigned char prev2_id = 0;
if (prev2)
prev2_id = (prev2[0] << 6) | (prev2[1] & 0x3F);
if (prev2_id > 0x20 || prev2_id < 0x50)
prev_connected = !!arabic_shape_map[prev2_id - 0x20][2];
switch (id)
{
case 0x22:
return 0xFEF5 + prev_connected;
case 0x23:
return 0xFEF7 + prev_connected;
case 0x25:
return 0xFEF9 + prev_connected;
case 0x27:
return 0xFEFB + prev_connected;
}
}
if (prev1_id > 0x20 || prev1_id < 0x50)
prev_connected = !!arabic_shape_map[prev1_id - 0x20][2];
}
if ((src[2] & 0xFC) == 0xD8)
{
unsigned char next_id = ((unsigned char)src[2] << 6) | ((unsigned char)src[3] & 0x3F);
if (next_id > 0x20 || next_id < 0x50)
next_connected = true;
}
result = arabic_shape_map[id - 0x20][prev_connected | (next_connected << 1)];
if (result)
return result;
return arabic_shape_map[id - 0x20][prev_connected];
}
return 0;
}
static char* font_driver_reshape_msg(const char* msg)
{
/* worst case transformations are 2 bytes to 4 bytes */
unsigned char* buffer = (unsigned char*)malloc((strlen(msg) * 2) + 1);
const unsigned char* src = (const unsigned char*)msg;
unsigned char* dst = (unsigned char*)buffer;
bool reverse = false;
while (*src || reverse)
{
if (reverse)
{
src--;
while (IS_MBCONT(src))
{
src--;
if (src == (const unsigned char*)msg)
goto end;
}
if (IS_RTL(src) || IS_DIR_NEUTRAL(src))
{
unsigned replacement = font_get_replacement((const char*)src, msg);
if (replacement)
{
if (replacement < 0x80)
*dst++ = replacement;
else if (replacement < 0x8000)
{
*dst++ = 0xC0 | (replacement >> 6);
*dst++ = 0x80 | (replacement & 0x3F);
}
else if (replacement < 0x10000)
{
/* merged glyphs */
if ((replacement >= 0xFEF5) && (replacement <= 0xFEFC))
src -= 2;
*dst++ = 0xE0 | (replacement >> 12);
*dst++ = 0x80 | ((replacement >> 6) & 0x3F);
*dst++ = 0x80 | (replacement & 0x3F);
}
else
{
*dst++ = 0xF0 | (replacement >> 18);
*dst++ = 0x80 | ((replacement >> 12) & 0x3F);
*dst++ = 0x80 | ((replacement >> 6) & 0x3F);
*dst++ = 0x80 | (replacement & 0x3F);
}
continue;
}
*dst++ = *src++;
while (IS_MBCONT(src))
*dst++ = *src++;
src--;