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RetroArch/gfx/font_driver.c
Themaister 3029f96511 Add a new "glcore" driver with slang support. 
This driver should sunset the old gl2 driver, but that driver will
likely live on to support really ancient and terrible GL stacks.
All the worst legacy cruft has been ripped out, and it's almost a decent
backend now.

Requirements for slang are GL 3.2+ or GLES3.
Some shaders require features which are not directly compatible with
GLES2 or legacy GL.

This driver shares a lot of concepts from the Vulkan driver.
The slang shader stack and SPIRV-Cross are used to implement the shader
spec, and the menu shaders are also shared with Vulkan.
2019-03-09 12:30:49 +01:00

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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>
#ifdef HAVE_CONFIG_H
#include "../config.h"
#endif
#include "font_driver.h"
#include "video_thread_wrapper.h"
#include "../configuration.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) || (defined(_WIN32) && !defined(_XBOX) && defined(_MSC_VER) && _MSC_VER > 1400) || defined(__CELLOS_LV2__) || defined(HAVE_LIBNX) || defined (HAVE_EMSCRIPTEN)
&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(_XBOX)
&d3d_xbox360_font,
#elif 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_OPENGL
static const font_renderer_t *gl_font_backends[] = {
&gl_raster_font,
#if defined(HAVE_LIBDBGFONT)
&libdbg_font,
#endif
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;
}
#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
#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
#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
#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
#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_OPENGL
case FONT_DRIVER_RENDER_OPENGL_API:
return gl_font_init_first(font_driver, font_handle,
video_data, font_path, font_size, is_threaded);
#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_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
#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
#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
#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--;
while (IS_MBCONT(src))
src--;
}
else
{
reverse = false;
src++;
while (IS_MBCONT(src) || IS_RTL(src) || IS_DIR_NEUTRAL(src))
src++;
}
}
else
{
if (IS_RTL(src))
{
reverse = true;
while (IS_MBCONT(src) || IS_RTL(src) || IS_DIR_NEUTRAL(src))
src++;
}
else
*dst++ = *src++;
}
}
end:
*dst = '\0';
return (char*)buffer;
}
#endif
void font_driver_render_msg(
video_frame_info_t *video_info,
void *font_data,
const char *msg,
const struct font_params *params)
{
font_data_t *font = (font_data_t*)(font_data
? font_data : video_font_driver);
if (msg && *msg && font && font->renderer && font->renderer->render_msg)
{
#ifdef HAVE_LANGEXTRA
char *new_msg = font_driver_reshape_msg(msg);
#else
char *new_msg = (char*)msg;
#endif
font->renderer->render_msg(video_info,
font->renderer_data, new_msg, params);
#ifdef HAVE_LANGEXTRA
free(new_msg);
#endif
}
}
void font_driver_bind_block(void *font_data, void *block)
{
font_data_t *font = (font_data_t*)(font_data ? font_data : video_font_driver);
if (font && font->renderer && font->renderer->bind_block)
font->renderer->bind_block(font->renderer_data, block);
}
void font_driver_flush(unsigned width, unsigned height, void *font_data,
video_frame_info_t *video_info)
{
font_data_t *font = (font_data_t*)(font_data ? font_data : video_font_driver);
if (font && font->renderer && font->renderer->flush)
font->renderer->flush(width, height, font->renderer_data, video_info);
}
int font_driver_get_message_width(void *font_data,
const char *msg, unsigned len, float scale)
{
font_data_t *font = (font_data_t*)(font_data ? font_data : video_font_driver);
if (font && font->renderer && font->renderer->get_message_width)
return font->renderer->get_message_width(font->renderer_data, msg, len, scale);
return -1;
}
int font_driver_get_line_height(void *font_data, float scale)
{
int line_height;
font_data_t *font = (font_data_t*)(font_data ? font_data : video_font_driver);
/* First try the line height implementation */
if (font && font->renderer && font->renderer->get_line_height)
if ((line_height = font->renderer->get_line_height(font->renderer_data)) != -1)
return (int)(line_height * roundf(scale));
/* Else return an approximation (width of 'a') */
return font_driver_get_message_width(font_data, "a", 1, scale);
}
void font_driver_free(void *font_data)
{
font_data_t *font = (font_data_t*)font_data;
if (font)
{
bool is_threaded = false;
#ifdef HAVE_THREADS
bool *is_threaded_tmp = video_driver_get_threaded();
is_threaded = *is_threaded_tmp;
#endif
if (font->renderer && font->renderer->free)
font->renderer->free(font->renderer_data, is_threaded);
font->renderer = NULL;
font->renderer_data = NULL;
free(font);
}
}
font_data_t *font_driver_init_first(
void *video_data, const char *font_path, float font_size,
bool threading_hint, bool is_threaded,
enum font_driver_render_api api)
{
const void *font_driver = NULL;
void *font_handle = NULL;
bool ok = false;
#ifdef HAVE_THREADS
if ( threading_hint
&& is_threaded
&& !video_driver_is_hw_context())
ok = video_thread_font_init(&font_driver, &font_handle,
video_data, font_path, font_size, api, font_init_first,
is_threaded);
else
#endif
ok = font_init_first(&font_driver, &font_handle,
video_data, font_path, font_size, api, is_threaded);
if (ok)
{
font_data_t *font = (font_data_t*)calloc(1, sizeof(*font));
font->renderer = (const font_renderer_t*)font_driver;
font->renderer_data = font_handle;
font->size = font_size;
return font;
}
return NULL;
}
void font_driver_init_osd(
void *video_data,
bool threading_hint,
bool is_threaded,
enum font_driver_render_api api)
{
settings_t *settings = config_get_ptr();
if (video_font_driver)
return;
video_font_driver = font_driver_init_first(video_data,
*settings->paths.path_font ? settings->paths.path_font : NULL,
settings->floats.video_font_size, threading_hint, is_threaded, api);
if (!video_font_driver)
RARCH_ERR("[font]: Failed to initialize OSD font.\n");
}
void font_driver_free_osd(void)
{
if (video_font_driver)
font_driver_free(video_font_driver);
video_font_driver = NULL;
}
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