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This commit is contained in:
Oleg Korshul
2022-05-31 15:26:36 +03:00
parent 32ac61f890
commit 19070ca5c9
8 changed files with 207 additions and 16 deletions
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117
DesktopEditor/fontengine/TextShaper.cpp
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@ -46,15 +46,12 @@
#include <freetype/internal/tttypes.h>
#include "ftmodapi.h"
#include <hb.h>
#include <hb-ft.h>
#include <hb-ot.h>
namespace NSShaper
{
#define ALLOC_WRITER(size) result->Alloc((size)); unsigned char* pCurData = result->Data
#define WRITE_INT(value) result->WriteInt(pCurData, value); pCurData += 4
#define WRITE_UINT(value) result->WriteUInt(pCurData, value); pCurData += 4
#define WRITE_UCHAR(value) *pCurData++ = value
CExternalPointer::CExternalPointer()
{
@ -617,3 +614,115 @@ namespace NSShaper
return true;
}
}
#ifdef SUPPORT_HARFBUZZ_SHAPER
#include <hb.h>
#include <hb-ft.h>
#include <hb-ot.h>
namespace NSShaper
{
#define g_userfeatures_count 5
hb_feature_t g_userfeatures[g_userfeatures_count];
bool g_userfeatures_init = false;
void* HB_LanguageFromString(const std::string language_bcp_47)
{
return (void*)hb_language_from_string(language_bcp_47.c_str(), language_bcp_47.length());
}
void HB_free(void* data)
{
HB_free(data);
}
void HB_ShapeText(void* face, void* font, char* text,
unsigned int nFeatures, unsigned int nScript, unsigned int nDirection, void* nLanguage, CExternalPointer* result)
{
// init features
if (!g_userfeatures_init)
{
hb_tag_t tags[] = {
HB_TAG('l','i','g','a'),
HB_TAG('c','l','i','g'),
HB_TAG('h','l','i','g'),
HB_TAG('d','l','i','g'),
HB_TAG('k','e','r','n')
};
for (int nTag = 0; nTag < g_userfeatures_count; ++nTag)
{
g_userfeatures[nTag].tag = tags[nTag];
g_userfeatures[nTag].value = 0;
g_userfeatures[nTag].start = HB_FEATURE_GLOBAL_START;
g_userfeatures[nTag].end = HB_FEATURE_GLOBAL_END;
}
g_userfeatures_init = true;
}
// font
hb_font_t* pFont;
if (NULL == font)
{
pFont = hb_ft_font_create((FT_Face)face, NULL);
hb_ft_font_set_funcs(pFont);
}
else
pFont = (hb_font_t*)font;
// features
for (int nTag = 0; nTag < g_userfeatures_count; ++nTag)
g_userfeatures[nTag].value = (nFeatures & (1 << nTag)) ? 1 : 0;
// buffer
hb_buffer_t* hbBuffer = hb_buffer_create();
hb_buffer_set_direction(hbBuffer, (hb_direction_t)nDirection);
hb_buffer_set_script(hbBuffer, (hb_script_t)nScript);
hb_buffer_set_language(hbBuffer, (hb_language_t)nLanguage);
hb_buffer_set_cluster_level(hbBuffer, HB_BUFFER_CLUSTER_LEVEL_MONOTONE_GRAPHEMES);
int text_len = (int)strlen(text);
hb_buffer_add_utf8(hbBuffer, text, text_len, 0, text_len);
hb_buffer_guess_segment_properties(hbBuffer);
// shape
hb_shape(pFont, hbBuffer, g_userfeatures, g_userfeatures_count);
unsigned int glyph_count;
hb_glyph_info_t* glyph_info = hb_buffer_get_glyph_infos(hbBuffer, &glyph_count);
hb_glyph_position_t* glyph_pos = hb_buffer_get_glyph_positions(hbBuffer, &glyph_count);
int nSize = 4 + 8 + glyph_count * (1 + 1 + 4 * 6);
ALLOC_WRITER(nSize);
WRITE_UINT(nSize);
uint64_t pFontPointer = (uint64_t)pFont;
WRITE_UINT(pFontPointer & 0xFFFFFFFF);
WRITE_UINT((pFontPointer >> 32) & 0xFFFFFFFF);
for (unsigned i = 0; i < glyph_count; ++i)
{
unsigned char nGlyphType = (unsigned char)hb_ot_layout_get_glyph_class(hb_font_get_face(pFont), glyph_info[i].codepoint);
unsigned char nGlyphFlags = (unsigned char)hb_glyph_info_get_glyph_flags(&glyph_info[i]);
WRITE_UCHAR(nGlyphType);
WRITE_UCHAR(nGlyphFlags);
WRITE_UINT(glyph_info[i].codepoint);
WRITE_UINT(glyph_info[i].cluster);
WRITE_INT(glyph_pos[i].x_advance);
WRITE_INT(glyph_pos[i].y_advance);
WRITE_INT(glyph_pos[i].x_offset);
WRITE_INT(glyph_pos[i].y_offset);
}
hb_buffer_destroy(hbBuffer);
}
void HB_FontFree(void* font)
{
hb_font_destroy((hb_font_t*)font);
}
}
#endif