true_type_factory *create_true_type_factory(char *font_search_path) {
true_type_factory *result;
int ft_error;
result = (true_type_factory*)fizmo_malloc(sizeof(true_type_factory));
if ((ft_error = FT_Init_FreeType(&result->ftlibrary))) {
i18n_translate_and_exit(
libpixelif_module_name,
i18n_libpixelif_FUNCTION_CALL_P0S_ABORTED_DUE_TO_ERROR,
-1,
"FT_Init_FreeType");
}
if ((ft_error = FT_Library_SetLcdFilter(
result->ftlibrary, FT_LCD_FILTER_DEFAULT))) {
result->render_mode = FT_RENDER_MODE_NORMAL;
}
else {
result->render_mode = FT_RENDER_MODE_LCD;
}
result->font_search_path = strdup(font_search_path);
TRACE_LOG("factory path: %s\n", result->font_search_path);
return result;
}
static bool
InitFreetype() {
FT_Error err = FT_Init_FreeType(&gFTLibrary);
if (err)
return false;
#if defined(SK_SUPPORT_LCDTEXT)
// Setup LCD filtering. This reduces colour fringes for LCD rendered
// glyphs.
err = FT_Library_SetLcdFilter(gFTLibrary, FT_LCD_FILTER_DEFAULT);
gLCDSupport = err == 0;
#endif
gLCDSupportValid = true;
return true;
}
/*
* Function : libaroma_font_init
* Return Value: byte
* Descriptions: init font instance
*/
byte libaroma_font_init() {
if (_libaroma_font_instance != NULL) {
return 0;
}
__libaroma_text_locker_init(0);
_libaroma_font_lock(1);
if (FT_Init_FreeType(&_libaroma_font_instance) == 0) {
#ifndef LIBAROMA_CONFIG_NOFONT_SUBPIXEL
FT_Library_SetLcdFilter(_libaroma_font_instance, FT_LCD_FILTER_DEFAULT);
#endif
/* cleanup font face */
memset(_libaroma_font_faces, 0,
sizeof(_LIBAROMA_FONT_FACE) * _LIBAROMA_FONT_MAX_FACE);
_libaroma_font_lock(0);
return 1;
}
ALOGE("libaroma_font_init Error FT_Init_FreeType");
_libaroma_font_lock(0);
return 0;
} /* End of libaroma_font_init */
CFontManager::CFontManager() : NSFonts::IFontManager()
{
m_pLibrary = NULL;
FT_Init_FreeType(&m_pLibrary);
FT_Library_SetLcdFilter(m_pLibrary, FT_LCD_FILTER_DEFAULT);
m_pFont = NULL;
m_pApplication = NULL;
m_pOwnerCache = NULL;
m_bStringGID = FALSE;
m_nLOAD_MODE = 40968;
m_nRENDER_MODE = FT_RENDER_MODE_NORMAL;
m_bUseDefaultFont = FALSE;
m_fCharSpacing = 0;
m_lUnits_Per_Em = 0;
m_lAscender = 0;
m_lDescender = 0;
m_lLineHeight = 0;
}
// ----------------------------------------------- texture_font_load_glyphs ---
size_t
texture_font_load_glyphs( texture_font_t * self,
const wchar_t * charcodes )
{
assert( self );
assert( charcodes );
size_t i, x, y, width, height, depth, w, h;
FT_Library library;
FT_Error error;
FT_Face face;
FT_Glyph ft_glyph;
FT_GlyphSlot slot;
FT_Bitmap ft_bitmap;
FT_UInt glyph_index;
texture_glyph_t *glyph;
ivec4 region;
size_t missed = 0;
width = self->atlas->width;
height = self->atlas->height;
depth = self->atlas->depth;
region.x=1;
region.y=1;
#ifdef RENDERSTRING
stringwidth=0;
stringheight=0;
stringshift=0;
#endif
if( !texture_font_load_face( &library, self->filename, self->size, &face ) )
{
return wcslen(charcodes);
}
/* Load each glyph */
for( i=0; i<wcslen(charcodes); ++i )
{
glyph_index = FT_Get_Char_Index( face, charcodes[i] );
// WARNING: We use texture-atlas depth to guess if user wants
// LCD subpixel rendering
FT_Int32 flags = 0;
if( self->outline_type > 0 )
{
flags |= FT_LOAD_NO_BITMAP;
}
else
{
flags |= FT_LOAD_RENDER;
}
if( !self->hinting )
{
flags |= FT_LOAD_NO_HINTING | FT_LOAD_NO_AUTOHINT;
}
else
{
flags |= FT_LOAD_FORCE_AUTOHINT;
}
if( depth == 3 )
{
FT_Library_SetLcdFilter( library, FT_LCD_FILTER_LIGHT );
flags |= FT_LOAD_TARGET_LCD;
if( self->filtering )
{
// FT_Library_SetLcdFilterWeights( library, self->lcd_weights );
}
}
error = FT_Load_Glyph( face, glyph_index, flags );
if( error )
{
fprintf( stderr, "FT_Error (line %d, code 0x%02x) : %s\n",
__LINE__, FT_Errors[error].code, FT_Errors[error].message );
FT_Done_FreeType( library );
return wcslen(charcodes)-i;
}
int ft_bitmap_width = 0;
int ft_bitmap_rows = 0;
int ft_bitmap_pitch = 0;
int ft_glyph_top = 0;
int ft_glyph_left = 0;
if( self->outline_type == 0 )
{
slot = face->glyph;
ft_bitmap = slot->bitmap;
ft_bitmap_width = slot->bitmap.width;
ft_bitmap_rows = slot->bitmap.rows;
ft_bitmap_pitch = slot->bitmap.pitch;
ft_glyph_top = slot->bitmap_top;
ft_glyph_left = slot->bitmap_left;
}
else
{
FT_Stroker stroker;
error = FT_Stroker_New( library, &stroker );
if( error )
{
fprintf(stderr, "FT_Error (0x%02x) : %s\n",
FT_Errors[error].code, FT_Errors[error].message);
return 0;
}
FT_Stroker_Set( stroker,
(int)(self->outline_thickness *64),
FT_STROKER_LINECAP_ROUND,
FT_STROKER_LINEJOIN_ROUND,
0);
error = FT_Get_Glyph( face->glyph, &ft_glyph);
if( error )
{
fprintf(stderr, "FT_Error (0x%02x) : %s\n",
FT_Errors[error].code, FT_Errors[error].message);
return 0;
}
if( self->outline_type == 1 )
{
error = FT_Glyph_Stroke( &ft_glyph, stroker, 1 );
}
else if ( self->outline_type == 2 )
{
error = FT_Glyph_StrokeBorder( &ft_glyph, stroker, 0, 1 );
}
else if ( self->outline_type == 3 )
{
error = FT_Glyph_StrokeBorder( &ft_glyph, stroker, 1, 1 );
}
if( error )
{
fprintf(stderr, "FT_Error (0x%02x) : %s\n",
FT_Errors[error].code, FT_Errors[error].message);
return 0;
}
if( depth == 1)
{
error = FT_Glyph_To_Bitmap( &ft_glyph, FT_RENDER_MODE_NORMAL, 0, 1);
if( error )
{
fprintf(stderr, "FT_Error (0x%02x) : %s\n",
FT_Errors[error].code, FT_Errors[error].message);
return 0;
}
}
else
{
error = FT_Glyph_To_Bitmap( &ft_glyph, FT_RENDER_MODE_LCD, 0, 1);
if( error )
{
fprintf(stderr, "FT_Error (0x%02x) : %s\n",
FT_Errors[error].code, FT_Errors[error].message);
return 0;
}
}
FT_BitmapGlyph ft_bitmap_glyph = (FT_BitmapGlyph) ft_glyph;
ft_bitmap = ft_bitmap_glyph->bitmap;
ft_bitmap_width = ft_bitmap.width;
ft_bitmap_rows = ft_bitmap.rows;
ft_bitmap_pitch = ft_bitmap.pitch;
ft_glyph_top = ft_bitmap_glyph->top;
ft_glyph_left = ft_bitmap_glyph->left;
FT_Stroker_Done(stroker);
}
// We want each glyph to be separated by at least one black pixel
// (for example for shader used in demo-subpixel.c)
w = ft_bitmap_width/depth + 1;
h = ft_bitmap_rows + 1;
#ifdef RENDERSTRING
static size_t maxh=0;
if (charcodes[i]==13) { stringshift+=maxh+1; region.x=1; }
if (h>maxh) maxh=h;
//region.y=stringshift+maxh-h+1+(h-ft_glyph_top);
region.y=stringshift+maxh-ft_glyph_top+1;
// if (stringshift+h+h-ft_glyph_top+1>stringheight) stringheight=stringshift+h+h-ft_glyph_top+1;
if (region.y+h>stringheight) stringheight=region.y+h;
if (region.x+w>stringwidth) stringwidth=region.x+w;
// if (region.y>=height) { missed++; continue; }
// if (region.x+w>=width) {missed++; continue; }
// if (h+h-ft_glyph_top+1>=height) { missed++; continue; }
// if (h+h-ft_glyph_top+2>=height) { missed++; continue; }
// if (region.y+maxh>=height) { missed++; continue; }
#else
region = texture_atlas_get_region( self->atlas, w, h );
if ( region.x < 0 )
{
missed++;
// fprintf( stderr, "Texture atlas is full (line %d)\n", __LINE__ );
continue;
}
#endif
w = w - 1;
h = h - 1;
x = region.x;
y = region.y;
if (charcodes[i]!=13) {
#ifdef RENDERSTRING
if (!(x<width)||!((x+w)<=width)||!(y<height)||!((y+h)<=height)) { missed++; continue; }
#endif
texture_atlas_set_region( self->atlas, x, y, w, h,
ft_bitmap.buffer, ft_bitmap.pitch );
}
glyph = texture_glyph_new( );
glyph->charcode = charcodes[i];
glyph->width = w;
glyph->height = h;
glyph->outline_type = self->outline_type;
glyph->outline_thickness = self->outline_thickness;
glyph->offset_x = ft_glyph_left;
glyph->offset_y = ft_glyph_top;
glyph->s0 = x/(float)width;
glyph->t0 = y/(float)height;
glyph->s1 = (x + glyph->width)/(float)width;
glyph->t1 = (y + glyph->height)/(float)height;
// Discard hinting to get advance
FT_Load_Glyph( face, glyph_index, FT_LOAD_RENDER | FT_LOAD_NO_HINTING);
slot = face->glyph;
glyph->advance_x = slot->advance.x/64.0;
glyph->advance_y = slot->advance.y/64.0;
#ifdef RENDERSTRING
if (charcodes[i]!=13) region.x+=(int)glyph->advance_x;
#endif
vector_push_back( self->glyphs, &glyph );
}
if( self->outline_type > 0 )
{
FT_Done_Glyph( ft_glyph );
}
FT_Done_Face( face );
FT_Done_FreeType( library );
// texture_atlas_upload( self->atlas );
texture_font_generate_kerning( self );
return missed;
}
FreetypeFontProvider::FreetypeFontProvider(const FontProvider::Options& options): FontProvider(options)
{
if ( options.size.height < 1 )
{
throw std::runtime_error("[FreetypeFontProvider] Invalid size");
}
if ( options.mode == L"" || options.mode == L"normal" )
{
m_render_mode = FT_RENDER_MODE_NORMAL;
}
else if ( options.mode == L"monochrome" )
{
m_render_mode = FT_RENDER_MODE_MONO;
}
else if ( options.mode == L"lcd" )
{
m_render_mode = FT_RENDER_MODE_LCD;
}
else
{
throw std::runtime_error("[FreetypeFontProvider] Invalid font.mode");
}
if ( FT_Init_FreeType(&m_font_library) )
{
throw std::runtime_error("[FreetypeFontProvider] Can't initialize Freetype");
}
std::string filename_u8 = Encoding::UTF8.FromUCS2(options.name);
if ( FT_New_Face(m_font_library, filename_u8.c_str(), 0, &m_font_face) )
{
Dispose();
throw std::runtime_error("[FreetypeFontProvider] Can't load font from file");
}
int hres = 64;
FT_Matrix matrix =
{
(int)((1.0/hres) * 0x10000L),
(int)((0.0) * 0x10000L),
(int)((0.0) * 0x10000L),
(int)((1.0) * 0x10000L)
};
if ( FT_Set_Char_Size(m_font_face, (uint32_t)(options.size.height*64), 0, 96*hres, 96) )
{
Dispose();
throw std::runtime_error("[FreetypeFontProvider] Can't setup font");
}
FT_Set_Transform(m_font_face, &matrix, NULL);
float yscale = m_font_face->size->metrics.y_scale / (float)(1 << 16);
int height = std::ceil((m_font_face->bbox.yMax-m_font_face->bbox.yMin) * yscale / 64.0f);
//int descender = std::floor(m_font_face->descender * yscale / 64.0f);
//int ascender = std::ceil(m_font_face->ascender * yscale / 64.0f);
auto get_metrics = [&](wchar_t code) -> FT_Glyph_Metrics
{
if ( FT_Load_Glyph(m_font_face, FT_Get_Char_Index(m_font_face, code), 0) )
{
throw std::runtime_error("[FreetypeFontProvider] Metrics error");
}
return m_font_face->glyph->metrics;
};
int width = 0;
FT_Glyph_Metrics mDot = get_metrics(L'.'), mAt = get_metrics(L'@');
if ( mDot.horiAdvance == mAt.horiAdvance )
{
// Monospace font
width = std::ceil(mDot.horiAdvance / 64.0f);
}
else
{
// This is not a monospace font
//throw std::runtime_error("[FreetypeFontProvider::ctor] This is not a monospace font");
width = std::ceil(mAt.horiAdvance / 64.0f);
}
width = std::ceil(width/64.0);
height = m_font_face->size->metrics.height >> 6;
//descender = m_font_face->size->metrics.descender >> 6;
m_cell_size = Size(width, height);
m_glyph_size = Size(width, height);
FT_Library_SetLcdFilter(m_font_library, FT_LCD_FILTER_DEFAULT);
return;
}
/* ------------------------------------------------------------------------- */
size_t
texture_font_cache_glyphs( TextureFont *self,
wchar_t * charcodes )
{
size_t i, x, y, width, height, depth, w, h;
FT_Library library;
FT_Error error;
FT_Face face;
FT_GlyphSlot slot;
FT_UInt glyph_index;
TextureGlyph *glyph;
Region region;
unsigned char c;
size_t missed = 0;
width = self->atlas->width;
height = self->atlas->height;
depth = self->atlas->depth;
if( !texture_font_load_face( &library, self->filename, self->size, &face ) )
{
return wcslen(charcodes);
}
/* Load each glyph */
for( i=0; i<wcslen(charcodes); ++i )
{
glyph_index = FT_Get_Char_Index( face, charcodes[i] );
// WARNING: We use texture-atlas depth to guess if user wants
// LCD subpixel rendering
FT_Int32 flags = FT_LOAD_RENDER;
if( !self->hinting )
{
flags |= FT_LOAD_NO_HINTING | FT_LOAD_NO_AUTOHINT;
}
else
{
flags |= FT_LOAD_FORCE_AUTOHINT;
}
if( depth == 3 )
{
FT_Library_SetLcdFilter( library, FT_LCD_FILTER_LIGHT );
flags |= FT_LOAD_TARGET_LCD;
if( self->lcd_filter )
{
FT_Library_SetLcdFilterWeights( library, self->lcd_weights );
}
}
error = FT_Load_Glyph( face, glyph_index, flags );
if( error )
{
fprintf(stderr, "FT_Error (line %d, code 0x%02x) : %s\n",
__LINE__, FT_Errors[error].code, FT_Errors[error].message);
FT_Done_FreeType( library );
return wcslen(charcodes)-i;
}
slot = face->glyph;
/* Gamma correction (sort of) */
for( x=0; x<slot->bitmap.width; ++x )
{
for( y=0; y<slot->bitmap.rows; ++y )
{
c = *(unsigned char *)(slot->bitmap.buffer
+ y*slot->bitmap.pitch + x );
c = (unsigned char) ( pow(c/255.0, self->gamma) * 255);
*(unsigned char *)(slot->bitmap.buffer
+ y*slot->bitmap.pitch + x ) = c;
}
}
// We want each glyph to be separated by at least one black pixel
// (for example for shader used in demo-subpixel.c)
w = slot->bitmap.width/depth + 1;
h = slot->bitmap.rows + 1;
region = texture_atlas_get_region( self->atlas, w, h );
if ( region.x < 0 )
{
missed++;
continue;
}
w = w - 1;
h = h - 1;
x = region.x;
y = region.y;
texture_atlas_set_region( self->atlas, x, y, w, h,
slot->bitmap.buffer, slot->bitmap.pitch );
glyph = texture_glyph_new( );
glyph->font = self;
glyph->charcode = charcodes[i];
glyph->kerning = 0;
glyph->width = w;
glyph->height = h;
glyph->offset_x = slot->bitmap_left;
glyph->offset_y = slot->bitmap_top;
glyph->u0 = x/(float)width;
glyph->v0 = y/(float)height;
glyph->u1 = (x + glyph->width)/(float)width;
glyph->v1 = (y + glyph->height)/(float)height;
/* Discard hinting to get advance */
FT_Load_Glyph( face, glyph_index, FT_LOAD_RENDER | FT_LOAD_NO_HINTING);
slot = face->glyph;
glyph->advance_x = slot->advance.x/64.0;
glyph->advance_y = slot->advance.y/64.0;
vector_push_back( self->glyphs, glyph );
texture_glyph_delete( glyph );
}
FT_Done_Face( face );
FT_Done_FreeType( library );
texture_atlas_upload( self->atlas );
texture_font_generate_kerning( self );
return missed;
}
// ------------------------------------------------------------------- init ---
void init( void )
{
size_t i, j;
int ptSize = 50*64;
int device_hdpi = 72;
int device_vdpi = 72;
atlas = texture_atlas_new( 512, 512, 3 );
/* Init freetype */
FT_Library ft_library;
assert(!FT_Init_FreeType(&ft_library));
/* Load our fonts */
FT_Face ft_face[NUM_EXAMPLES];
assert(!FT_New_Face( ft_library, fonts[ENGLISH], 0, &ft_face[ENGLISH]) );
assert(!FT_Set_Char_Size( ft_face[ENGLISH], 0, ptSize, device_hdpi, device_vdpi ) );
// ftfdump( ft_face[ENGLISH] ); // wonderful world of encodings ...
force_ucs2_charmap( ft_face[ENGLISH] ); // which we ignore.
assert( !FT_New_Face(ft_library, fonts[ARABIC], 0, &ft_face[ARABIC]) );
assert( !FT_Set_Char_Size(ft_face[ARABIC], 0, ptSize, device_hdpi, device_vdpi ) );
// ftfdump( ft_face[ARABIC] );
force_ucs2_charmap( ft_face[ARABIC] );
assert(!FT_New_Face( ft_library, fonts[CHINESE], 0, &ft_face[CHINESE]) );
assert(!FT_Set_Char_Size( ft_face[CHINESE], 0, ptSize, device_hdpi, device_vdpi ) );
// ftfdump( ft_face[CHINESE] );
force_ucs2_charmap( ft_face[CHINESE] );
/* Get our harfbuzz font structs */
hb_font_t *hb_ft_font[NUM_EXAMPLES];
hb_ft_font[ENGLISH] = hb_ft_font_create( ft_face[ENGLISH], NULL );
hb_ft_font[ARABIC] = hb_ft_font_create( ft_face[ARABIC] , NULL );
hb_ft_font[CHINESE] = hb_ft_font_create( ft_face[CHINESE], NULL );
/* Create a buffer for harfbuzz to use */
hb_buffer_t *buf = hb_buffer_create();
for (i=0; i < NUM_EXAMPLES; ++i)
{
hb_buffer_set_direction( buf, text_directions[i] ); /* or LTR */
hb_buffer_set_script( buf, scripts[i] ); /* see hb-unicode.h */
hb_buffer_set_language( buf,
hb_language_from_string(languages[i], strlen(languages[i])) );
/* Layout the text */
hb_buffer_add_utf8( buf, texts[i], strlen(texts[i]), 0, strlen(texts[i]) );
hb_shape( hb_ft_font[i], buf, NULL, 0 );
unsigned int glyph_count;
hb_glyph_info_t *glyph_info = hb_buffer_get_glyph_infos(buf, &glyph_count);
hb_glyph_position_t *glyph_pos = hb_buffer_get_glyph_positions(buf, &glyph_count);
FT_GlyphSlot slot;
FT_Bitmap ft_bitmap;
float size = 24;
size_t hres = 64;
FT_Error error;
FT_Int32 flags = 0;
flags |= FT_LOAD_RENDER;
flags |= FT_LOAD_TARGET_LCD;
FT_Library_SetLcdFilter( ft_library, FT_LCD_FILTER_LIGHT );
FT_Matrix matrix = { (int)((1.0/hres) * 0x10000L),
(int)((0.0) * 0x10000L),
(int)((0.0) * 0x10000L),
(int)((1.0) * 0x10000L) };
/* Set char size */
error = FT_Set_Char_Size( ft_face[i], (int)(ptSize), 0, 72*hres, 72 );
if( error )
{
//fprintf( stderr, "FT_Error (line %d, code 0x%02x) : %s\n",
// __LINE__, FT_Errors[error].code, FT_Errors[error].message );
FT_Done_Face( ft_face[i] );
break;
}
/* Set transform matrix */
FT_Set_Transform( ft_face[i], &matrix, NULL );
for (j = 0; j < glyph_count; ++j)
{
/* Load glyph */
error = FT_Load_Glyph( ft_face[i], glyph_info[j].codepoint, flags );
if( error )
{
//fprintf( stderr, "FT_Error (line %d, code 0x%02x) : %s\n",
// __LINE__, FT_Errors[error].code, FT_Errors[error].message );
FT_Done_Face( ft_face[i] );
break;
}
slot = ft_face[i]->glyph;
ft_bitmap = slot->bitmap;
int ft_bitmap_width = slot->bitmap.width;
int ft_bitmap_rows = slot->bitmap.rows;
int ft_bitmap_pitch = slot->bitmap.pitch;
int ft_glyph_top = slot->bitmap_top;
int ft_glyph_left = slot->bitmap_left;
int w = ft_bitmap_width/3; // 3 because of LCD/RGB encoding
int h = ft_bitmap_rows;
ivec4 region = texture_atlas_get_region( atlas, w+1, h+1 );
if ( region.x < 0 )
{
fprintf( stderr, "Texture atlas is full (line %d)\n", __LINE__ );
continue;
}
int x = region.x, y = region.y;
texture_atlas_set_region( atlas, region.x, region.y,
w, h, ft_bitmap.buffer, ft_bitmap.pitch );
printf("%d: %dx%d %f %f\n",
glyph_info[j].codepoint,
ft_bitmap_width,
ft_bitmap_rows,
glyph_pos[j].x_advance/64.,
glyph_pos[j].y_advance/64.);
}
/* clean up the buffer, but don't kill it just yet */
hb_buffer_reset(buf);
}
/* Cleanup */
hb_buffer_destroy( buf );
for( i=0; i < NUM_EXAMPLES; ++i )
hb_font_destroy( hb_ft_font[i] );
FT_Done_FreeType( ft_library );
glClearColor(1,1,1,1);
glEnable( GL_BLEND );
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
glGenTextures( 1, &atlas->id );
glBindTexture( GL_TEXTURE_2D, atlas->id );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, atlas->width, atlas->height,
0, GL_RGB, GL_UNSIGNED_BYTE, atlas->data );
typedef struct { float x,y,z, u,v, r,g,b,a, shift, gamma; } vertex_t;
vertex_t vertices[4] = {
{ 0, 0,0, 0,1, 0,0,0,1, 0, 1},
{ 0,512,0, 0,0, 0,0,0,1, 0, 1},
{512,512,0, 1,0, 0,0,0,1, 0, 1},
{512, 0,0, 1,1, 0,0,0,1, 0, 1} };
GLuint indices[6] = { 0, 1, 2, 0,2,3 };
buffer = vertex_buffer_new( "vertex:3f,"
"tex_coord:2f,"
"color:4f,"
"ashift:1f,"
"agamma:1f" );
vertex_buffer_push_back( buffer, vertices, 4, indices, 6 );
shader = shader_load("shaders/text.vert",
"shaders/text.frag");
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
}
/**
* @brief RE_ConstructGlyphInfo
* @param[in] imageSize
* @param[in] imageOut
* @param[in,out] xOut
* @param[in,out] yOut
* @param[in,out] maxHeight
* @param[in] face
* @param[in] codepoint
* @param[in] calcHeight
* @return
*/
static glyphInfo_t *RE_ConstructGlyphInfo(int imageSize, unsigned char *imageOut, int *xOut, int *yOut, int *maxHeight, FT_Face face, unsigned long codepoint, qboolean calcHeight)
{
static glyphInfo_t glyph;
unsigned char *src, *dst;
FT_Bitmap *bitmap = NULL;
FT_Int32 flags = FT_LOAD_DEFAULT;
Com_Memset(&glyph, 0, sizeof(glyphInfo_t));
// make sure everything is here
if (face != NULL)
{
FT_UInt index = FT_Get_Char_Index(face, codepoint);
float scaled_width, scaled_height;
int i;
if (index == 0)
{
return &glyph; // nothing to render
}
flags |= FT_LOAD_FORCE_AUTOHINT;
// Test filtering
FT_Library_SetLcdFilter(ftLibrary, FT_LCD_FILTER_LIGHT);
flags |= FT_LOAD_TARGET_LCD;
FT_Load_Glyph(face, index, flags);
bitmap = R_RenderGlyph(face->glyph, &glyph);
if (!bitmap)
{
return &glyph;
}
if (glyph.height > *maxHeight)
{
*maxHeight = glyph.height;
}
if (calcHeight)
{
ri.Free(bitmap->buffer);
ri.Free(bitmap);
return &glyph;
}
scaled_width = glyph.pitch;
scaled_height = glyph.height;
// we need to make sure we fit
if (*xOut + scaled_width + 1 >= imageSize - 1)
{
*xOut = 0;
*yOut += *maxHeight + 1;
}
if (*yOut + *maxHeight + 1 >= imageSize - 1)
{
*yOut = -1;
*xOut = -1;
ri.Free(bitmap->buffer);
ri.Free(bitmap);
return &glyph;
}
src = bitmap->buffer;
dst = imageOut + (*yOut * imageSize) + *xOut;
if (bitmap->pixel_mode == FT_PIXEL_MODE_MONO)
{
for (i = 0; i < glyph.height; i++)
{
int j;
unsigned char *_src = src;
unsigned char *_dst = dst;
unsigned char mask = 0x80;
unsigned char val = *_src;
for (j = 0; j < glyph.pitch; j++)
{
if (mask == 0x80)
{
val = *_src++;
}
if (val & mask)
{
*_dst = 0xff;
}
mask >>= 1;
if (mask == 0)
{
mask = 0x80;
}
_dst++;
}
src += glyph.pitch;
dst += imageSize;
}
}
else
{
for (i = 0; i < glyph.height; i++)
// ------------------------------------------------------------------- main ---
int main( int argc, char **argv )
{
size_t i, j;
int ptSize = 50*64;
int device_hdpi = 72;
int device_vdpi = 72;
glutInit( &argc, argv );
glutInitWindowSize( 512, 512 );
glutInitDisplayMode( GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH );
glutCreateWindow( argv[0] );
glutReshapeFunc( reshape );
glutDisplayFunc( display );
glutKeyboardFunc( keyboard );
#ifndef __APPLE__
glewExperimental = GL_TRUE;
GLenum err = glewInit();
if (GLEW_OK != err)
{
/* Problem: glewInit failed, something is seriously wrong. */
fprintf( stderr, "Error: %s\n", glewGetErrorString(err) );
exit( EXIT_FAILURE );
}
fprintf( stderr, "Using GLEW %s\n", glewGetString(GLEW_VERSION) );
#endif
texture_atlas_t * atlas = texture_atlas_new( 512, 512, 3 );
/* Init freetype */
FT_Library ft_library;
assert(!FT_Init_FreeType(&ft_library));
/* Load our fonts */
FT_Face ft_face[NUM_EXAMPLES];
assert(!FT_New_Face( ft_library, fonts[ENGLISH], 0, &ft_face[ENGLISH]) );
assert(!FT_Set_Char_Size( ft_face[ENGLISH], 0, ptSize, device_hdpi, device_vdpi ) );
// ftfdump( ft_face[ENGLISH] ); // wonderful world of encodings ...
force_ucs2_charmap( ft_face[ENGLISH] ); // which we ignore.
assert( !FT_New_Face(ft_library, fonts[ARABIC], 0, &ft_face[ARABIC]) );
assert( !FT_Set_Char_Size(ft_face[ARABIC], 0, ptSize, device_hdpi, device_vdpi ) );
// ftfdump( ft_face[ARABIC] );
force_ucs2_charmap( ft_face[ARABIC] );
assert(!FT_New_Face( ft_library, fonts[CHINESE], 0, &ft_face[CHINESE]) );
assert(!FT_Set_Char_Size( ft_face[CHINESE], 0, ptSize, device_hdpi, device_vdpi ) );
// ftfdump( ft_face[CHINESE] );
force_ucs2_charmap( ft_face[CHINESE] );
/* Get our harfbuzz font structs */
hb_font_t *hb_ft_font[NUM_EXAMPLES];
hb_ft_font[ENGLISH] = hb_ft_font_create( ft_face[ENGLISH], NULL );
hb_ft_font[ARABIC] = hb_ft_font_create( ft_face[ARABIC] , NULL );
hb_ft_font[CHINESE] = hb_ft_font_create( ft_face[CHINESE], NULL );
/* Create a buffer for harfbuzz to use */
hb_buffer_t *buf = hb_buffer_create();
for (i=0; i < NUM_EXAMPLES; ++i)
{
hb_buffer_set_direction( buf, text_directions[i] ); /* or LTR */
hb_buffer_set_script( buf, scripts[i] ); /* see hb-unicode.h */
hb_buffer_set_language( buf,
hb_language_from_string(languages[i], strlen(languages[i])) );
/* Layout the text */
hb_buffer_add_utf8( buf, texts[i], strlen(texts[i]), 0, strlen(texts[i]) );
hb_shape( hb_ft_font[i], buf, NULL, 0 );
unsigned int glyph_count;
hb_glyph_info_t *glyph_info = hb_buffer_get_glyph_infos(buf, &glyph_count);
hb_glyph_position_t *glyph_pos = hb_buffer_get_glyph_positions(buf, &glyph_count);
FT_GlyphSlot slot;
FT_Bitmap ft_bitmap;
float size = 24;
size_t hres = 64;
FT_Error error;
FT_Int32 flags = 0;
flags |= FT_LOAD_RENDER;
flags |= FT_LOAD_TARGET_LCD;
FT_Library_SetLcdFilter( ft_library, FT_LCD_FILTER_LIGHT );
FT_Matrix matrix = { (int)((1.0/hres) * 0x10000L),
(int)((0.0) * 0x10000L),
(int)((0.0) * 0x10000L),
(int)((1.0) * 0x10000L) };
/* Set char size */
error = FT_Set_Char_Size( ft_face[i], (int)(ptSize), 0, 72*hres, 72 );
if( error )
{
//fprintf( stderr, "FT_Error (line %d, code 0x%02x) : %s\n",
// __LINE__, FT_Errors[error].code, FT_Errors[error].message );
FT_Done_Face( ft_face[i] );
break;
}
/* Set transform matrix */
FT_Set_Transform( ft_face[i], &matrix, NULL );
for (j = 0; j < glyph_count; ++j)
{
/* Load glyph */
error = FT_Load_Glyph( ft_face[i], glyph_info[j].codepoint, flags );
if( error )
{
//fprintf( stderr, "FT_Error (line %d, code 0x%02x) : %s\n",
// __LINE__, FT_Errors[error].code, FT_Errors[error].message );
FT_Done_Face( ft_face[i] );
break;
}
slot = ft_face[i]->glyph;
ft_bitmap = slot->bitmap;
int ft_bitmap_width = slot->bitmap.width;
int ft_bitmap_rows = slot->bitmap.rows;
int ft_bitmap_pitch = slot->bitmap.pitch;
int ft_glyph_top = slot->bitmap_top;
int ft_glyph_left = slot->bitmap_left;
int w = ft_bitmap_width/3; // 3 because of LCD/RGB encoding
int h = ft_bitmap_rows;
ivec4 region = texture_atlas_get_region( atlas, w+1, h+1 );
if ( region.x < 0 )
{
fprintf( stderr, "Texture atlas is full (line %d)\n", __LINE__ );
continue;
}
int x = region.x, y = region.y;
texture_atlas_set_region( atlas, region.x, region.y,
w, h, ft_bitmap.buffer, ft_bitmap.pitch );
printf("%d: %dx%d %f %f\n",
glyph_info[j].codepoint,
ft_bitmap_width,
ft_bitmap_rows,
glyph_pos[j].x_advance/64.,
glyph_pos[j].y_advance/64.);
}
/* clean up the buffer, but don't kill it just yet */
hb_buffer_reset(buf);
}
/* Cleanup */
hb_buffer_destroy( buf );
for( i=0; i < NUM_EXAMPLES; ++i )
hb_font_destroy( hb_ft_font[i] );
FT_Done_FreeType( ft_library );
glClearColor(1,1,1,1);
glEnable( GL_BLEND );
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
glEnable( GL_TEXTURE_2D );
glBindTexture( GL_TEXTURE_2D, atlas->id );
texture_atlas_upload( atlas );
typedef struct { float x,y,z, u,v, r,g,b,a, shift, gamma; } vertex_t;
vertex_t vertices[4] = {
{ 0, 0,0, 0,1, 0,0,0,1, 0, 1},
{ 0,512,0, 0,0, 0,0,0,1, 0, 1},
{512,512,0, 1,0, 0,0,0,1, 0, 1},
{512, 0,0, 1,1, 0,0,0,1, 0, 1} };
GLuint indices[6] = { 0, 1, 2, 0,2,3 };
buffer = vertex_buffer_new( "vertex:3f,"
"tex_coord:2f,"
"color:4f,"
"ashift:1f,"
"agamma:1f" );
vertex_buffer_push_back( buffer, vertices, 4, indices, 6 );
shader = shader_load("shaders/text.vert", "shaders/text.frag");
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
glutMainLoop( );
return 0;
}
// ----------------------------------------------- texture_font_load_glyphs ---
size_t
texture_font_load_glyphs( texture_font_t * self,
const wchar_t * charcodes )
{
size_t i, j, x, y, width, height, depth, w, h;
FT_Library library;
FT_Error error;
FT_Face face;
FT_Glyph ft_glyph;
FT_GlyphSlot slot;
FT_Bitmap ft_bitmap;
FT_UInt glyph_index;
texture_glyph_t *glyph;
FT_Int32 flags = 0;
int ft_glyph_top = 0;
int ft_glyph_left = 0;
ivec4 region;
size_t missed = 0;
char pass;
assert( self );
assert( charcodes );
width = self->atlas->width;
height = self->atlas->height;
depth = self->atlas->depth;
if (!texture_font_get_face(self, &library, &face))
return wcslen(charcodes);
/* Load each glyph */
for( i = 0; i < wcslen(charcodes); ++i ) {
pass = 0;
/* Check if charcode has been already loaded */
for( j = 0; j < self->glyphs->size; ++j ) {
glyph = *(texture_glyph_t **) vector_get( self->glyphs, j );
// If charcode is -1, we don't care about outline type or thickness
// if( (glyph->charcode == charcodes[i])) {
if( (glyph->charcode == charcodes[i]) &&
((charcodes[i] == (wchar_t)(-1) ) ||
((glyph->outline_type == self->outline_type) &&
(glyph->outline_thickness == self->outline_thickness)) ))
{
pass = 1;
break;
}
}
if(pass)
continue;
flags = 0;
ft_glyph_top = 0;
ft_glyph_left = 0;
glyph_index = FT_Get_Char_Index( face, charcodes[i] );
// WARNING: We use texture-atlas depth to guess if user wants
// LCD subpixel rendering
if( self->outline_type > 0 )
{
flags |= FT_LOAD_NO_BITMAP;
}
else
{
flags |= FT_LOAD_RENDER;
}
if( !self->hinting )
{
flags |= FT_LOAD_NO_HINTING | FT_LOAD_NO_AUTOHINT;
}
else
{
flags |= FT_LOAD_FORCE_AUTOHINT;
}
if( depth == 3 )
{
FT_Library_SetLcdFilter( library, FT_LCD_FILTER_LIGHT );
flags |= FT_LOAD_TARGET_LCD;
if( self->filtering )
{
FT_Library_SetLcdFilterWeights( library, self->lcd_weights );
}
}
error = FT_Load_Glyph( face, glyph_index, flags );
if( error )
{
FT_Done_Face( face );
FT_Done_FreeType( library );
throw wcslen(charcodes)-i;
}
if( self->outline_type == 0 )
{
slot = face->glyph;
ft_bitmap = slot->bitmap;
ft_glyph_top = slot->bitmap_top;
ft_glyph_left = slot->bitmap_left;
}
else
{
FT_Stroker stroker;
FT_BitmapGlyph ft_bitmap_glyph;
error = FT_Stroker_New( library, &stroker );
if( error )
{
FT_Done_Face( face );
FT_Stroker_Done( stroker );
FT_Done_FreeType( library );
throw;
}
FT_Stroker_Set(stroker,
(int)(self->outline_thickness * HRES),
FT_STROKER_LINECAP_ROUND,
FT_STROKER_LINEJOIN_ROUND,
0);
error = FT_Get_Glyph( face->glyph, &ft_glyph);
if( error )
{
FT_Done_Face( face );
FT_Stroker_Done( stroker );
FT_Done_FreeType( library );
throw;
}
if( self->outline_type == 1 )
{
error = FT_Glyph_Stroke( &ft_glyph, stroker, 1 );
}
else if ( self->outline_type == 2 )
{
error = FT_Glyph_StrokeBorder( &ft_glyph, stroker, 0, 1 );
}
else if ( self->outline_type == 3 )
{
error = FT_Glyph_StrokeBorder( &ft_glyph, stroker, 1, 1 );
}
if( error )
{
FT_Done_Face( face );
FT_Stroker_Done( stroker );
FT_Done_FreeType( library );
throw;
}
if( depth == 1)
{
error = FT_Glyph_To_Bitmap( &ft_glyph, FT_RENDER_MODE_NORMAL, 0, 1);
if( error )
{
FT_Done_Face( face );
FT_Stroker_Done( stroker );
FT_Done_FreeType( library );
throw;
}
}
else
{
error = FT_Glyph_To_Bitmap( &ft_glyph, FT_RENDER_MODE_LCD, 0, 1);
if( error )
{
FT_Done_Face( face );
FT_Stroker_Done( stroker );
FT_Done_FreeType( library );
throw;
}
}
ft_bitmap_glyph = (FT_BitmapGlyph) ft_glyph;
ft_bitmap = ft_bitmap_glyph->bitmap;
ft_glyph_top = ft_bitmap_glyph->top;
ft_glyph_left = ft_bitmap_glyph->left;
FT_Stroker_Done(stroker);
}
// We want each glyph to be separated by at least one black pixel
// (for example for shader used in demo-subpixel.c)
w = ft_bitmap.width/depth + 1;
h = ft_bitmap.rows + 1;
region = texture_atlas_get_region( self->atlas, w, h );
if ( region.x < 0 )
{
missed++;
fprintf( stderr, "Texture atlas is full (line %d)\n", __LINE__ );
continue;
}
w = w - 1;
h = h - 1;
x = region.x;
y = region.y;
texture_atlas_set_region( self->atlas, x, y, w, h,
ft_bitmap.buffer, ft_bitmap.pitch );
glyph = texture_glyph_new( );
glyph->charcode = charcodes[i];
glyph->width = w;
glyph->height = h;
glyph->outline_type = self->outline_type;
glyph->outline_thickness = self->outline_thickness;
glyph->offset_x = ft_glyph_left;
glyph->offset_y = ft_glyph_top;
glyph->s0 = x/(float)width;
glyph->t0 = y/(float)height;
glyph->s1 = (x + glyph->width)/(float)width;
glyph->t1 = (y + glyph->height)/(float)height;
// Discard hinting to get advance
FT_Load_Glyph( face, glyph_index, FT_LOAD_RENDER | FT_LOAD_NO_HINTING);
slot = face->glyph;
glyph->advance_x = slot->advance.x / HRESf;
glyph->advance_y = slot->advance.y / HRESf;
vector_push_back( self->glyphs, &glyph );
if( self->outline_type > 0 )
{
FT_Done_Glyph( ft_glyph );
}
}
FT_Done_Face( face );
FT_Done_FreeType( library );
texture_atlas_upload( self->atlas );
texture_font_generate_kerning( self );
return missed;
}
