bool TTBMFont::addFontGlyph(int fontnum,FT_UInt glyphIndex,wchar32_t chr) {
FT_Error error;
FT_Face face=fontFaces_[fontnum].face;
error = FT_Load_Glyph(face, glyphIndex, FT_LOAD_DEFAULT);
if (error)
return false;
int top, left, width, height;
if (face->glyph->format == FT_GLYPH_FORMAT_OUTLINE) {
FT_BBox bbox;
if (stroker) {
FT_Glyph glyph;
error = FT_Get_Glyph(face->glyph, &glyph);
if (error)
return false;
error = FT_Glyph_StrokeBorder(&glyph, stroker, false, true);
if (error)
return false;
FT_OutlineGlyph oGlyph = reinterpret_cast<FT_OutlineGlyph>(glyph);
FT_Outline_Get_CBox(&oGlyph->outline, &bbox);
FT_Done_Glyph(glyph);
}
else
FT_Outline_Get_CBox(&face->glyph->outline, &bbox);
bbox.xMin &= ~63;
bbox.yMin &= ~63;
bbox.xMax = (bbox.xMax + 63) & ~63;
bbox.yMax = (bbox.yMax + 63) & ~63;
width = (bbox.xMax - bbox.xMin) >> 6;
height = (bbox.yMax - bbox.yMin) >> 6;
top = bbox.yMax >> 6;
left = bbox.xMin >> 6;
} else if (face->glyph->format == FT_GLYPH_FORMAT_BITMAP) {
// 让一个字体槽加粗，并且填充其他的大小属性
void New_GlyphSlot_Embolden( FT_GlyphSlot slot, const FT_Pos str_x, const FT_Pos str_y)
{
FT_Library library;
FT_Face face;
FT_Error error;
FT_BBox newBox, oldBox;
FT_Pos xstr = (FT_Pos)str_x;
FT_Pos ystr = (FT_Pos)str_y;
CC_ASSERT(slot != NULL);
library = slot->library;
face = slot->face;
if ( slot->format != FT_GLYPH_FORMAT_OUTLINE &&
slot->format != FT_GLYPH_FORMAT_BITMAP )
return;
if ( slot->format == FT_GLYPH_FORMAT_OUTLINE ) {
FT_Outline_Get_CBox(&slot->outline , &oldBox);
error = New_FT_Outline_Embolden( &slot->outline, xstr , ystr);
if ( error )
return;
FT_Outline_Get_CBox(&slot->outline , &newBox);
xstr = (newBox.xMax - newBox.xMin) - (oldBox.xMax - oldBox.xMin);
ystr = (newBox.yMax - newBox.yMin) - (oldBox.yMax - oldBox.yMin);
} else if ( slot->format == FT_GLYPH_FORMAT_BITMAP ) {
xstr = FT_PIX_FLOOR( xstr );
if ( xstr == 0 )
xstr = 1 << 6;
ystr = FT_PIX_FLOOR( ystr );
error = FT_Bitmap_Embolden( library, &slot->bitmap, xstr, ystr );
if ( error )
return;
}
if ( slot->advance.x )
slot->advance.x += xstr;
if ( slot->advance.y )
slot->advance.y += ystr;
slot->metrics.width += xstr;
slot->metrics.height += ystr;
slot->metrics.horiBearingY += ystr;
slot->metrics.horiAdvance += xstr;
slot->metrics.vertBearingX -= xstr / 2;
slot->metrics.vertBearingY += ystr;
slot->metrics.vertAdvance += ystr;
if ( slot->format == FT_GLYPH_FORMAT_BITMAP )
slot->bitmap_top += ystr >> 6;
}
static void
profile_outline( FT_Outline* outline,
long repeat )
{
FT_BBox bbox;
long count;
long time0;
time0 = get_time();
for ( count = repeat; count > 0; count-- )
FT_Outline_Get_CBox( outline, &bbox );
time0 = get_time() - time0;
printf( "time = %5.2f cbox = [%.2f %.2f %.2f %.2f]\n",
((double)time0/10000.0),
XVAL( bbox.xMin ),
XVAL( bbox.yMin ),
XVAL( bbox.xMax ),
XVAL( bbox.yMax ) );
time0 = get_time();
for ( count = repeat; count > 0; count-- )
FT_Outline_Get_BBox( outline, &bbox );
time0 = get_time() - time0;
printf( "time = %5.2f bbox = [%.2f %.2f %.2f %.2f]\n",
((double)time0/10000.0),
XVAL( bbox.xMin ),
XVAL( bbox.yMin ),
XVAL( bbox.xMax ),
XVAL( bbox.yMax ) );
}
ft_outline_glyph_bbox( FT_Glyph outline_glyph,
FT_BBox* bbox )
{
FT_OutlineGlyph glyph = (FT_OutlineGlyph)outline_glyph;
FT_Outline_Get_CBox( &glyph->outline, bbox );
}
static PyObject*
Py_Outline_get_cbox(Py_Outline* self, PyObject* args, PyObject* kwds)
{
FT_BBox bbox;
FT_Outline_Get_CBox(&self->x, &bbox);
return Py_BBox_cnew(&bbox, 1.0);
}
/* return the glyph's control box */
static void
ft_smooth_get_cbox( FT_Renderer render,
FT_GlyphSlot slot,
FT_BBox* cbox )
{
FT_MEM_SET( cbox, 0, sizeof ( *cbox ) );
if ( slot->format == render->glyph_format )
FT_Outline_Get_CBox( &slot->outline, cbox );
}
/* convert a slot's glyph image into a bitmap */
static FT_Error
ft_smooth_render_generic( FT_Renderer render,
FT_GlyphSlot slot,
FT_Render_Mode mode,
const FT_Vector* origin,
FT_Render_Mode required_mode )
{
FT_Error error;
FT_Outline* outline = NULL;
FT_BBox cbox;
FT_UInt width, height, pitch;
#ifndef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
FT_UInt height_org, width_org;
#endif
FT_Bitmap* bitmap;
FT_Memory memory;
FT_Int hmul = mode == FT_RENDER_MODE_LCD;
FT_Int vmul = mode == FT_RENDER_MODE_LCD_V;
FT_Pos x_shift, y_shift, x_left, y_top;
FT_Raster_Params params;
/* check glyph image format */
if ( slot->format != render->glyph_format )
{
error = Smooth_Err_Invalid_Argument;
goto Exit;
}
/* check mode */
if ( mode != required_mode )
return Smooth_Err_Cannot_Render_Glyph;
outline = &slot->outline;
/* translate the outline to the new origin if needed */
if ( origin )
FT_Outline_Translate( outline, origin->x, origin->y );
/* compute the control box, and grid fit it */
FT_Outline_Get_CBox( outline, &cbox );
cbox.xMin = FT_PIX_FLOOR( cbox.xMin );
cbox.yMin = FT_PIX_FLOOR( cbox.yMin );
cbox.xMax = FT_PIX_CEIL( cbox.xMax );
cbox.yMax = FT_PIX_CEIL( cbox.yMax );
if ( cbox.xMin < 0 && cbox.xMax > FT_INT_MAX + cbox.xMin )
{
FT_ERROR(( "ft_smooth_render_generic: glyph too large:"
" xMin = %d, xMax = %d\n",
cbox.xMin >> 6, cbox.xMax >> 6 ));
return Smooth_Err_Raster_Overflow;
}
/* return the glyph's control box */
static
void ft_raster1_get_cbox(FT_Renderer render,
FT_GlyphSlot slot,
FT_BBox *cbox)
{
MEM_Set(cbox, 0, sizeof(*cbox));
if(slot->format == render->glyph_format)
{
FT_Outline_Get_CBox(&slot->outline, cbox);
}
}
Bitmap *outline_to_bitmap(ASS_Library *library, FT_Library ftlib,
FT_Outline *outline, int bord)
{
Bitmap *bm;
int w, h;
int error;
FT_BBox bbox;
FT_Bitmap bitmap;
FT_Outline_Get_CBox(outline, &bbox);
// move glyph to origin (0, 0)
bbox.xMin &= ~63;
bbox.yMin &= ~63;
FT_Outline_Translate(outline, -bbox.xMin, -bbox.yMin);
// bitmap size
bbox.xMax = (bbox.xMax + 63) & ~63;
bbox.yMax = (bbox.yMax + 63) & ~63;
w = (bbox.xMax - bbox.xMin) >> 6;
h = (bbox.yMax - bbox.yMin) >> 6;
// pen offset
bbox.xMin >>= 6;
bbox.yMax >>= 6;
if (w * h > 8000000) {
ass_msg(library, MSGL_WARN, "Glyph bounding box too large: %dx%dpx",
w, h);
return NULL;
}
// allocate and set up bitmap
bm = alloc_bitmap(w + 2 * bord, h + 2 * bord);
bm->left = bbox.xMin - bord;
bm->top = -bbox.yMax - bord;
bitmap.width = w;
bitmap.rows = h;
bitmap.pitch = bm->stride;
bitmap.buffer = bm->buffer + bord + bm->stride * bord;
bitmap.num_grays = 256;
bitmap.pixel_mode = FT_PIXEL_MODE_GRAY;
// render into target bitmap
if ((error = FT_Outline_Get_Bitmap(ftlib, outline, &bitmap))) {
ass_msg(library, MSGL_WARN, "Failed to rasterize glyph: %d\n", error);
ass_free_bitmap(bm);
return NULL;
}
return bm;
}
void TTFont::getBounds(const wchar32_t *text, float letterSpacing, int *pminx, int *pminy, int *pmaxx, int *pmaxy) const
{
float scalex = application_->getLogicalScaleX();
int minx = 0x7fffffff;
int miny = 0x7fffffff;
int maxx = -0x7fffffff;
int maxy = -0x7fffffff;
int size = 0;
for (const wchar32_t *t = text; *t; ++t, ++size)
;
int x = 0, y = 0;
FT_UInt prev = 0;
for (int i = 0; i < size; ++i)
{
FT_UInt glyphIndex = FT_Get_Char_Index(face_, text[i]);
if (glyphIndex == 0)
continue;
if (FT_Load_Glyph(face_, glyphIndex, FT_LOAD_DEFAULT))
continue;
int top, left, width, height;
if (face_->glyph->format == FT_GLYPH_FORMAT_OUTLINE)
{
FT_BBox bbox;
FT_Outline_Get_CBox(&face_->glyph->outline, &bbox);
bbox.xMin &= ~63;
bbox.yMin &= ~63;
bbox.xMax = (bbox.xMax + 63) & ~63;
bbox.yMax = (bbox.yMax + 63) & ~63;
width = (bbox.xMax - bbox.xMin) >> 6;
height = (bbox.yMax - bbox.yMin) >> 6;
top = bbox.yMax >> 6;
left = bbox.xMin >> 6;
}
else if (face_->glyph->format == FT_GLYPH_FORMAT_BITMAP)
static void
dump_outline( FT_Outline* outline )
{
FT_BBox bbox;
/* compute and display cbox */
FT_Outline_Get_CBox( outline, &bbox );
printf( "cbox = [%.2f %.2f %.2f %.2f]\n",
XVAL( bbox.xMin ),
XVAL( bbox.yMin ),
XVAL( bbox.xMax ),
XVAL( bbox.yMax ) );
/* compute and display bbox */
FT_Outline_Get_BBox( outline, &bbox );
printf( "bbox = [%.2f %.2f %.2f %.2f]\n",
XVAL( bbox.xMin ),
XVAL( bbox.yMin ),
XVAL( bbox.xMax ),
XVAL( bbox.yMax ) );
}
/*
* \brief Finish a drawing. This only sets the horizontal advance according
* to the glyph's bbox at the moment.
*/
static void drawing_finish(ASS_Drawing *drawing, int raw_mode)
{
int i, offset;
FT_BBox bbox;
FT_Outline *ol = &drawing->glyph->outline;
// Close the last contour
drawing_close_shape(drawing);
#if 0
// Dump points
for (i = 0; i < ol->n_points; i++) {
printf("point (%d, %d)\n", (int) ol->points[i].x,
(int) ol->points[i].y);
}
// Dump contours
for (i = 0; i < ol->n_contours; i++)
printf("contour %d\n", ol->contours[i]);
#endif
ass_msg(drawing->library, MSGL_V,
"Parsed drawing with %d points and %d contours", ol->n_points,
ol->n_contours);
if (raw_mode)
return;
FT_Outline_Get_CBox(&drawing->glyph->outline, &bbox);
drawing->glyph->root.advance.x = d6_to_d16(bbox.xMax - bbox.xMin);
drawing->desc = double_to_d6(-drawing->pbo * drawing->scale_y);
drawing->asc = bbox.yMax - bbox.yMin + drawing->desc;
// Place it onto the baseline
offset = (bbox.yMax - bbox.yMin) + double_to_d6(-drawing->pbo *
drawing->scale_y);
for (i = 0; i < ol->n_points; i++)
ol->points[i].y += offset;
}
static FT_Error
LoadTrueTypeChar(Font *fnt,
int idx,
Boolean hint,
Boolean quiet)
{
FT_Error error;
int flags;
flags = FT_LOAD_DEFAULT;
if (hint)
flags |= FT_LOAD_FORCE_AUTOHINT;
error = FT_Load_Glyph(face, idx, flags);
if (!error)
{
if (fnt->efactor != 1.0 || fnt->slant != 0.0 )
FT_Outline_Transform(&face->glyph->outline, &matrix1);
if (fnt->rotate)
{
FT_Outline_Transform(&face->glyph->outline, &matrix2);
error = FT_Outline_Get_BBox(&face->glyph->outline, &bbox); /* we need the non-
grid-fitted bbox */
if (!error)
FT_Outline_Translate(&face->glyph->outline,
face->glyph->metrics.vertBearingY - bbox.xMin,
-fnt->y_offset * ppem * 64);
}
}
if (!error)
error = FT_Outline_Get_BBox(&face->glyph->outline, &bbox);
if (!error)
{
FT_Outline_Get_CBox(&face->glyph->outline, &bbox); /* for the case of BBox != CBox */
SetRasterArea(quiet);
}
return error;
}
/* convert a slot's glyph image into a bitmap */
static
FT_Error ft_raster1_render(FT_Renderer render,
FT_GlyphSlot slot,
FT_UInt mode,
FT_Vector *origin)
{
FT_Error error;
FT_Outline *outline;
FT_BBox cbox;
FT_UInt width, height, pitch;
FT_Bitmap *bitmap;
FT_Memory memory;
FT_Raster_Params params;
/* check glyph image format */
if(slot->format != render->glyph_format)
{
error = FT_Err_Invalid_Argument;
goto Exit;
}
/* check rendering mode */
if(mode != ft_render_mode_mono)
{
/* raster1 is only capable of producing monochrome bitmaps */
if(render->clazz == &ft_raster1_renderer_class)
{
return FT_Err_Cannot_Render_Glyph;
}
}
else
{
/* raster5 is only capable of producing 5-gray-levels bitmaps */
if(render->clazz == &ft_raster5_renderer_class)
{
return FT_Err_Cannot_Render_Glyph;
}
}
outline = &slot->outline;
/* translate the outline to the new origin if needed */
if(origin)
{
FT_Outline_Translate(outline, origin->x, origin->y);
}
/* compute the control box, and grid fit it */
FT_Outline_Get_CBox(outline, &cbox);
cbox.xMin &= -64;
cbox.yMin &= -64;
cbox.xMax = (cbox.xMax + 63) & - 64;
cbox.yMax = (cbox.yMax + 63) & - 64;
width = (cbox.xMax - cbox.xMin) >> 6;
height = (cbox.yMax - cbox.yMin) >> 6;
bitmap = &slot->bitmap;
memory = render->root.memory;
/* release old bitmap buffer */
if(slot->flags & ft_glyph_own_bitmap)
{
FREE(bitmap->buffer);
slot->flags &= ~ft_glyph_own_bitmap;
}
/* allocate new one, depends on pixel format */
if(!(mode & ft_render_mode_mono))
{
/* we pad to 32 bits, only for backwards compatibility with FT 1.x */
pitch = (width + 3) & - 4;
bitmap->pixel_mode = ft_pixel_mode_grays;
bitmap->num_grays = 256;
}
else
{
pitch = (width + 7) >> 3;
bitmap->pixel_mode = ft_pixel_mode_mono;
}
bitmap->width = width;
bitmap->rows = height;
bitmap->pitch = pitch;
if(ALLOC(bitmap->buffer, (FT_ULong)pitch * height))
{
goto Exit;
}
slot->flags |= ft_glyph_own_bitmap;
/* translate outline to render it into the bitmap */
FT_Outline_Translate(outline, -cbox.xMin, -cbox.yMin);
/* set up parameters */
params.target = bitmap;
params.source = outline;
params.flags = 0;
if(bitmap->pixel_mode == ft_pixel_mode_grays)
{
params.flags |= ft_raster_flag_aa;
}
/* render outline into the bitmap */
error = render->raster_render(render->raster, ¶ms);
if(error)
{
goto Exit;
}
slot->format = ft_glyph_format_bitmap;
slot->bitmap_left = cbox.xMin >> 6;
slot->bitmap_top = cbox.yMax >> 6;
Exit:
return error;
}
pfr_slot_load( FT_GlyphSlot pfrslot, /* PFR_Slot */
FT_Size pfrsize, /* PFR_Size */
FT_UInt gindex,
FT_Int32 load_flags )
{
PFR_Slot slot = (PFR_Slot)pfrslot;
PFR_Size size = (PFR_Size)pfrsize;
FT_Error error;
PFR_Face face = (PFR_Face)pfrslot->face;
PFR_Char gchar;
FT_Outline* outline = &pfrslot->outline;
FT_ULong gps_offset;
if ( gindex > 0 )
gindex--;
/* check that the glyph index is correct */
FT_ASSERT( gindex < face->phy_font.num_chars );
/* try to load an embedded bitmap */
if ( ( load_flags & ( FT_LOAD_NO_SCALE | FT_LOAD_NO_BITMAP ) ) == 0 )
{
error = pfr_slot_load_bitmap( slot, size, gindex );
if ( error == 0 )
goto Exit;
}
if ( load_flags & FT_LOAD_SBITS_ONLY )
{
error = PFR_Err_Invalid_Argument;
goto Exit;
}
gchar = face->phy_font.chars + gindex;
pfrslot->format = FT_GLYPH_FORMAT_OUTLINE;
outline->n_points = 0;
outline->n_contours = 0;
gps_offset = face->header.gps_section_offset;
/* load the glyph outline (FT_LOAD_NO_RECURSE isn't supported) */
error = pfr_glyph_load( &slot->glyph, face->root.stream,
gps_offset, gchar->gps_offset, gchar->gps_size );
if ( !error )
{
FT_BBox cbox;
FT_Glyph_Metrics* metrics = &pfrslot->metrics;
FT_Pos advance;
FT_Int em_metrics, em_outline;
FT_Bool scaling;
scaling = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 );
/* copy outline data */
*outline = slot->glyph.loader->base.outline;
outline->flags &= ~FT_OUTLINE_OWNER;
outline->flags |= FT_OUTLINE_REVERSE_FILL;
if ( size && pfrsize->metrics.y_ppem < 24 )
outline->flags |= FT_OUTLINE_HIGH_PRECISION;
/* compute the advance vector */
metrics->horiAdvance = 0;
metrics->vertAdvance = 0;
advance = gchar->advance;
em_metrics = face->phy_font.metrics_resolution;
em_outline = face->phy_font.outline_resolution;
if ( em_metrics != em_outline )
advance = FT_MulDiv( advance, em_outline, em_metrics );
if ( face->phy_font.flags & PFR_PHY_VERTICAL )
metrics->vertAdvance = advance;
else
metrics->horiAdvance = advance;
pfrslot->linearHoriAdvance = metrics->horiAdvance;
pfrslot->linearVertAdvance = metrics->vertAdvance;
/* make-up vertical metrics(?) */
metrics->vertBearingX = 0;
metrics->vertBearingY = 0;
/* Apply the font matrix, if any. */
/* TODO: Test existing fonts with unusual matrix */
/* whether we have to adjust Units per EM. */
{
FT_Matrix font_matrix;
font_matrix.xx = face->log_font.matrix[0] << 8;
font_matrix.yx = face->log_font.matrix[1] << 8;
font_matrix.xy = face->log_font.matrix[2] << 8;
font_matrix.yy = face->log_font.matrix[3] << 8;
FT_Outline_Transform( outline, &font_matrix );
}
/* scale when needed */
if ( scaling )
{
FT_Int n;
FT_Fixed x_scale = pfrsize->metrics.x_scale;
FT_Fixed y_scale = pfrsize->metrics.y_scale;
FT_Vector* vec = outline->points;
/* scale outline points */
for ( n = 0; n < outline->n_points; n++, vec++ )
{
vec->x = FT_MulFix( vec->x, x_scale );
vec->y = FT_MulFix( vec->y, y_scale );
}
/* scale the advance */
metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale );
}
/* compute the rest of the metrics */
FT_Outline_Get_CBox( outline, &cbox );
metrics->width = cbox.xMax - cbox.xMin;
metrics->height = cbox.yMax - cbox.yMin;
metrics->horiBearingX = cbox.xMin;
metrics->horiBearingY = cbox.yMax - metrics->height;
}
Exit:
return error;
}
/* convert a slot's glyph image into a bitmap */
static FT_Error
ft_raster1_render( FT_Renderer render,
FT_GlyphSlot slot,
FT_Render_Mode mode,
const FT_Vector* origin )
{
FT_Error error;
FT_Outline* outline;
FT_BBox cbox, cbox0;
FT_UInt width, height, pitch;
FT_Bitmap* bitmap;
FT_Memory memory;
FT_Raster_Params params;
/* check glyph image format */
if ( slot->format != render->glyph_format )
{
error = Raster_Err_Invalid_Argument;
goto Exit;
}
/* check rendering mode */
#ifndef FT_CONFIG_OPTION_PIC
if ( mode != FT_RENDER_MODE_MONO )
{
/* raster1 is only capable of producing monochrome bitmaps */
if ( render->clazz == &ft_raster1_renderer_class )
return Raster_Err_Cannot_Render_Glyph;
}
else
{
/* raster5 is only capable of producing 5-gray-levels bitmaps */
if ( render->clazz == &ft_raster5_renderer_class )
return Raster_Err_Cannot_Render_Glyph;
}
#else /* FT_CONFIG_OPTION_PIC */
/* When PIC is enabled, we cannot get to the class object */
/* so instead we check the final character in the class name */
/* ("raster5" or "raster1"). Yes this is a hack. */
/* The "correct" thing to do is have different render function */
/* for each of the classes. */
if ( mode != FT_RENDER_MODE_MONO )
{
/* raster1 is only capable of producing monochrome bitmaps */
if ( render->clazz->root.module_name[6] == '1' )
return Raster_Err_Cannot_Render_Glyph;
}
else
{
/* raster5 is only capable of producing 5-gray-levels bitmaps */
if ( render->clazz->root.module_name[6] == '5' )
return Raster_Err_Cannot_Render_Glyph;
}
#endif /* FT_CONFIG_OPTION_PIC */
outline = &slot->outline;
/* translate the outline to the new origin if needed */
if ( origin )
FT_Outline_Translate( outline, origin->x, origin->y );
/* compute the control box, and grid fit it */
FT_Outline_Get_CBox( outline, &cbox0 );
/* undocumented but confirmed: bbox values get rounded */
#if 1
cbox.xMin = FT_PIX_ROUND( cbox0.xMin );
cbox.yMin = FT_PIX_ROUND( cbox0.yMin );
cbox.xMax = FT_PIX_ROUND( cbox0.xMax );
cbox.yMax = FT_PIX_ROUND( cbox0.yMax );
#else
cbox.xMin = FT_PIX_FLOOR( cbox.xMin );
cbox.yMin = FT_PIX_FLOOR( cbox.yMin );
cbox.xMax = FT_PIX_CEIL( cbox.xMax );
cbox.yMax = FT_PIX_CEIL( cbox.yMax );
#endif
/* in the event either width or height round to 0, */
/* try explicitly rounding up/down. In the case of */
/* glyphs containing only one very narrow feature, */
/* this give the drop-out compensation in the */
/* in the scan conversion code to do its stuff. */
width = (FT_UInt)( ( cbox.xMax - cbox.xMin ) >> 6 );
if ( width == 0 )
{
cbox.xMin = FT_PIX_FLOOR( cbox0.xMin );
cbox.xMax = FT_PIX_CEIL( cbox0.xMax );
width = (FT_UInt)( ( cbox.xMax - cbox.xMin ) >> 6 );
}
cff_slot_load( CFF_GlyphSlot glyph,
CFF_Size size,
FT_UInt glyph_index,
FT_Int32 load_flags )
{
FT_Error error;
CFF_Decoder decoder;
PS_Decoder psdecoder;
TT_Face face = (TT_Face)glyph->root.face;
FT_Bool hinting, scaled, force_scaling;
CFF_Font cff = (CFF_Font)face->extra.data;
PSAux_Service psaux = (PSAux_Service)face->psaux;
const CFF_Decoder_Funcs decoder_funcs = psaux->cff_decoder_funcs;
FT_Matrix font_matrix;
FT_Vector font_offset;
force_scaling = FALSE;
/* in a CID-keyed font, consider `glyph_index' as a CID and map */
/* it immediately to the real glyph_index -- if it isn't a */
/* subsetted font, glyph_indices and CIDs are identical, though */
if ( cff->top_font.font_dict.cid_registry != 0xFFFFU &&
cff->charset.cids )
{
/* don't handle CID 0 (.notdef) which is directly mapped to GID 0 */
if ( glyph_index != 0 )
{
glyph_index = cff_charset_cid_to_gindex( &cff->charset,
glyph_index );
if ( glyph_index == 0 )
return FT_THROW( Invalid_Argument );
}
}
else if ( glyph_index >= cff->num_glyphs )
return FT_THROW( Invalid_Argument );
if ( load_flags & FT_LOAD_NO_RECURSE )
load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;
glyph->x_scale = 0x10000L;
glyph->y_scale = 0x10000L;
if ( size )
{
glyph->x_scale = size->root.metrics.x_scale;
glyph->y_scale = size->root.metrics.y_scale;
}
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
/* try to load embedded bitmap if any */
/* */
/* XXX: The convention should be emphasized in */
/* the documents because it can be confusing. */
if ( size )
{
CFF_Face cff_face = (CFF_Face)size->root.face;
SFNT_Service sfnt = (SFNT_Service)cff_face->sfnt;
FT_Stream stream = cff_face->root.stream;
if ( size->strike_index != 0xFFFFFFFFUL &&
sfnt->load_eblc &&
( load_flags & FT_LOAD_NO_BITMAP ) == 0 )
{
TT_SBit_MetricsRec metrics;
error = sfnt->load_sbit_image( face,
size->strike_index,
glyph_index,
(FT_UInt)load_flags,
stream,
&glyph->root.bitmap,
&metrics );
if ( !error )
{
FT_Bool has_vertical_info;
FT_UShort advance;
FT_Short dummy;
glyph->root.outline.n_points = 0;
glyph->root.outline.n_contours = 0;
glyph->root.metrics.width = (FT_Pos)metrics.width << 6;
glyph->root.metrics.height = (FT_Pos)metrics.height << 6;
glyph->root.metrics.horiBearingX = (FT_Pos)metrics.horiBearingX << 6;
glyph->root.metrics.horiBearingY = (FT_Pos)metrics.horiBearingY << 6;
glyph->root.metrics.horiAdvance = (FT_Pos)metrics.horiAdvance << 6;
glyph->root.metrics.vertBearingX = (FT_Pos)metrics.vertBearingX << 6;
glyph->root.metrics.vertBearingY = (FT_Pos)metrics.vertBearingY << 6;
glyph->root.metrics.vertAdvance = (FT_Pos)metrics.vertAdvance << 6;
glyph->root.format = FT_GLYPH_FORMAT_BITMAP;
if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
{
glyph->root.bitmap_left = metrics.vertBearingX;
glyph->root.bitmap_top = metrics.vertBearingY;
}
else
{
glyph->root.bitmap_left = metrics.horiBearingX;
glyph->root.bitmap_top = metrics.horiBearingY;
}
/* compute linear advance widths */
(void)( (SFNT_Service)face->sfnt )->get_metrics( face, 0,
glyph_index,
&dummy,
&advance );
glyph->root.linearHoriAdvance = advance;
has_vertical_info = FT_BOOL(
face->vertical_info &&
face->vertical.number_Of_VMetrics > 0 );
/* get the vertical metrics from the vmtx table if we have one */
if ( has_vertical_info )
{
(void)( (SFNT_Service)face->sfnt )->get_metrics( face, 1,
glyph_index,
&dummy,
&advance );
glyph->root.linearVertAdvance = advance;
}
else
{
/* make up vertical ones */
if ( face->os2.version != 0xFFFFU )
glyph->root.linearVertAdvance = (FT_Pos)
( face->os2.sTypoAscender - face->os2.sTypoDescender );
else
glyph->root.linearVertAdvance = (FT_Pos)
( face->horizontal.Ascender - face->horizontal.Descender );
}
return error;
}
}
}
#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
/* return immediately if we only want the embedded bitmaps */
if ( load_flags & FT_LOAD_SBITS_ONLY )
return FT_THROW( Invalid_Argument );
/* if we have a CID subfont, use its matrix (which has already */
/* been multiplied with the root matrix) */
/* this scaling is only relevant if the PS hinter isn't active */
if ( cff->num_subfonts )
{
FT_Long top_upm, sub_upm;
FT_Byte fd_index = cff_fd_select_get( &cff->fd_select,
glyph_index );
if ( fd_index >= cff->num_subfonts )
fd_index = (FT_Byte)( cff->num_subfonts - 1 );
top_upm = (FT_Long)cff->top_font.font_dict.units_per_em;
sub_upm = (FT_Long)cff->subfonts[fd_index]->font_dict.units_per_em;
font_matrix = cff->subfonts[fd_index]->font_dict.font_matrix;
font_offset = cff->subfonts[fd_index]->font_dict.font_offset;
if ( top_upm != sub_upm )
{
glyph->x_scale = FT_MulDiv( glyph->x_scale, top_upm, sub_upm );
glyph->y_scale = FT_MulDiv( glyph->y_scale, top_upm, sub_upm );
force_scaling = TRUE;
}
}
else
{
font_matrix = cff->top_font.font_dict.font_matrix;
font_offset = cff->top_font.font_dict.font_offset;
}
glyph->root.outline.n_points = 0;
glyph->root.outline.n_contours = 0;
/* top-level code ensures that FT_LOAD_NO_HINTING is set */
/* if FT_LOAD_NO_SCALE is active */
hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_HINTING ) == 0 );
scaled = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 );
glyph->hint = hinting;
glyph->scaled = scaled;
glyph->root.format = FT_GLYPH_FORMAT_OUTLINE; /* by default */
{
#ifdef CFF_CONFIG_OPTION_OLD_ENGINE
PS_Driver driver = (PS_Driver)FT_FACE_DRIVER( face );
#endif
FT_Byte* charstring;
FT_ULong charstring_len;
decoder_funcs->init( &decoder, face, size, glyph, hinting,
FT_LOAD_TARGET_MODE( load_flags ),
cff_get_glyph_data,
cff_free_glyph_data );
/* this is for pure CFFs */
if ( load_flags & FT_LOAD_ADVANCE_ONLY )
decoder.width_only = TRUE;
decoder.builder.no_recurse =
(FT_Bool)( load_flags & FT_LOAD_NO_RECURSE );
/* now load the unscaled outline */
error = cff_get_glyph_data( face, glyph_index,
&charstring, &charstring_len );
if ( error )
goto Glyph_Build_Finished;
error = decoder_funcs->prepare( &decoder, size, glyph_index );
if ( error )
goto Glyph_Build_Finished;
#ifdef CFF_CONFIG_OPTION_OLD_ENGINE
/* choose which CFF renderer to use */
if ( driver->hinting_engine == FT_HINTING_FREETYPE )
error = decoder_funcs->parse_charstrings_old( &decoder,
charstring,
charstring_len,
0 );
else
#endif
{
psaux->ps_decoder_init( &psdecoder, &decoder, FALSE );
error = decoder_funcs->parse_charstrings( &psdecoder,
charstring,
charstring_len );
/* Adobe's engine uses 16.16 numbers everywhere; */
/* as a consequence, glyphs larger than 2000ppem get rejected */
if ( FT_ERR_EQ( error, Glyph_Too_Big ) )
{
/* this time, we retry unhinted and scale up the glyph later on */
/* (the engine uses and sets the hardcoded value 0x10000 / 64 = */
/* 0x400 for both `x_scale' and `y_scale' in this case) */
hinting = FALSE;
force_scaling = TRUE;
glyph->hint = hinting;
error = decoder_funcs->parse_charstrings( &psdecoder,
charstring,
charstring_len );
}
}
cff_free_glyph_data( face, &charstring, charstring_len );
if ( error )
goto Glyph_Build_Finished;
#ifdef FT_CONFIG_OPTION_INCREMENTAL
/* Control data and length may not be available for incremental */
/* fonts. */
if ( face->root.internal->incremental_interface )
{
glyph->root.control_data = NULL;
glyph->root.control_len = 0;
}
else
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
/* We set control_data and control_len if charstrings is loaded. */
/* See how charstring loads at cff_index_access_element() in */
/* cffload.c. */
{
CFF_Index csindex = &cff->charstrings_index;
if ( csindex->offsets )
{
glyph->root.control_data = csindex->bytes +
csindex->offsets[glyph_index] - 1;
glyph->root.control_len = (FT_Long)charstring_len;
}
}
Glyph_Build_Finished:
/* save new glyph tables, if no error */
if ( !error )
decoder.builder.funcs.done( &decoder.builder );
/* XXX: anything to do for broken glyph entry? */
}
#ifdef FT_CONFIG_OPTION_INCREMENTAL
/* Incremental fonts can optionally override the metrics. */
if ( !error &&
face->root.internal->incremental_interface &&
face->root.internal->incremental_interface->funcs->get_glyph_metrics )
{
FT_Incremental_MetricsRec metrics;
metrics.bearing_x = decoder.builder.left_bearing.x;
metrics.bearing_y = 0;
metrics.advance = decoder.builder.advance.x;
metrics.advance_v = decoder.builder.advance.y;
error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(
face->root.internal->incremental_interface->object,
glyph_index, FALSE, &metrics );
decoder.builder.left_bearing.x = metrics.bearing_x;
decoder.builder.advance.x = metrics.advance;
decoder.builder.advance.y = metrics.advance_v;
}
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
if ( !error )
{
/* Now, set the metrics -- this is rather simple, as */
/* the left side bearing is the xMin, and the top side */
/* bearing the yMax. */
/* For composite glyphs, return only left side bearing and */
/* advance width. */
if ( load_flags & FT_LOAD_NO_RECURSE )
{
FT_Slot_Internal internal = glyph->root.internal;
glyph->root.metrics.horiBearingX = decoder.builder.left_bearing.x;
glyph->root.metrics.horiAdvance = decoder.glyph_width;
internal->glyph_matrix = font_matrix;
internal->glyph_delta = font_offset;
internal->glyph_transformed = 1;
}
else
{
FT_BBox cbox;
FT_Glyph_Metrics* metrics = &glyph->root.metrics;
FT_Bool has_vertical_info;
if ( face->horizontal.number_Of_HMetrics )
{
FT_Short horiBearingX = 0;
FT_UShort horiAdvance = 0;
( (SFNT_Service)face->sfnt )->get_metrics( face, 0,
glyph_index,
&horiBearingX,
&horiAdvance );
metrics->horiAdvance = horiAdvance;
metrics->horiBearingX = horiBearingX;
glyph->root.linearHoriAdvance = horiAdvance;
}
else
{
/* copy the _unscaled_ advance width */
metrics->horiAdvance = decoder.glyph_width;
glyph->root.linearHoriAdvance = decoder.glyph_width;
}
glyph->root.internal->glyph_transformed = 0;
has_vertical_info = FT_BOOL( face->vertical_info &&
face->vertical.number_Of_VMetrics > 0 );
/* get the vertical metrics from the vmtx table if we have one */
if ( has_vertical_info )
{
FT_Short vertBearingY = 0;
FT_UShort vertAdvance = 0;
( (SFNT_Service)face->sfnt )->get_metrics( face, 1,
glyph_index,
&vertBearingY,
&vertAdvance );
metrics->vertBearingY = vertBearingY;
metrics->vertAdvance = vertAdvance;
}
else
{
/* make up vertical ones */
if ( face->os2.version != 0xFFFFU )
metrics->vertAdvance = (FT_Pos)( face->os2.sTypoAscender -
face->os2.sTypoDescender );
else
metrics->vertAdvance = (FT_Pos)( face->horizontal.Ascender -
face->horizontal.Descender );
}
glyph->root.linearVertAdvance = metrics->vertAdvance;
glyph->root.format = FT_GLYPH_FORMAT_OUTLINE;
glyph->root.outline.flags = 0;
if ( size && size->root.metrics.y_ppem < 24 )
glyph->root.outline.flags |= FT_OUTLINE_HIGH_PRECISION;
glyph->root.outline.flags |= FT_OUTLINE_REVERSE_FILL;
/* apply the font matrix, if any */
if ( font_matrix.xx != 0x10000L || font_matrix.yy != 0x10000L ||
font_matrix.xy != 0 || font_matrix.yx != 0 )
{
FT_Outline_Transform( &glyph->root.outline, &font_matrix );
metrics->horiAdvance = FT_MulFix( metrics->horiAdvance,
font_matrix.xx );
metrics->vertAdvance = FT_MulFix( metrics->vertAdvance,
font_matrix.yy );
}
if ( font_offset.x || font_offset.y )
{
FT_Outline_Translate( &glyph->root.outline,
font_offset.x,
font_offset.y );
metrics->horiAdvance += font_offset.x;
metrics->vertAdvance += font_offset.y;
}
if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 || force_scaling )
{
/* scale the outline and the metrics */
FT_Int n;
FT_Outline* cur = &glyph->root.outline;
FT_Vector* vec = cur->points;
FT_Fixed x_scale = glyph->x_scale;
FT_Fixed y_scale = glyph->y_scale;
/* First of all, scale the points */
if ( !hinting || !decoder.builder.hints_funcs )
for ( n = cur->n_points; n > 0; n--, vec++ )
{
vec->x = FT_MulFix( vec->x, x_scale );
vec->y = FT_MulFix( vec->y, y_scale );
}
/* Then scale the metrics */
metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale );
}
/* compute the other metrics */
FT_Outline_Get_CBox( &glyph->root.outline, &cbox );
metrics->width = cbox.xMax - cbox.xMin;
metrics->height = cbox.yMax - cbox.yMin;
metrics->horiBearingX = cbox.xMin;
metrics->horiBearingY = cbox.yMax;
if ( has_vertical_info )
metrics->vertBearingX = metrics->horiBearingX -
metrics->horiAdvance / 2;
else
{
if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
ft_synthesize_vertical_metrics( metrics,
metrics->vertAdvance );
}
}
}
return error;
}
pfr_slot_load( PFR_Slot slot,
PFR_Size size,
FT_UInt gindex,
FT_Int32 load_flags )
{
FT_Error error;
PFR_Face face = (PFR_Face)slot->root.face;
PFR_Char gchar;
FT_Outline* outline = &slot->root.outline;
FT_ULong gps_offset;
if (gindex > 0)
gindex--;
/* check that the glyph index is correct */
FT_ASSERT( gindex < face->phy_font.num_chars );
/* try to load an embedded bitmap */
if ( ( load_flags & ( FT_LOAD_NO_SCALE | FT_LOAD_NO_BITMAP ) ) == 0 )
{
error = pfr_slot_load_bitmap( slot, size, gindex );
if ( error == 0 )
goto Exit;
}
gchar = face->phy_font.chars + gindex;
slot->root.format = FT_GLYPH_FORMAT_OUTLINE;
outline->n_points = 0;
outline->n_contours = 0;
gps_offset = face->header.gps_section_offset;
/* load the glyph outline (FT_LOAD_NO_RECURSE isn't supported) */
error = pfr_glyph_load( &slot->glyph, face->root.stream,
gps_offset, gchar->gps_offset, gchar->gps_size );
if ( !error )
{
FT_BBox cbox;
FT_Glyph_Metrics* metrics = &slot->root.metrics;
FT_Pos advance;
FT_Int em_metrics, em_outline;
FT_Bool scaling;
scaling = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 );
/* copy outline data */
*outline = slot->glyph.loader->base.outline;
outline->flags &= ~FT_OUTLINE_OWNER;
outline->flags |= FT_OUTLINE_REVERSE_FILL;
if ( size && size->root.metrics.y_ppem < 24 )
outline->flags |= FT_OUTLINE_HIGH_PRECISION;
/* compute the advance vector */
metrics->horiAdvance = 0;
metrics->vertAdvance = 0;
advance = gchar->advance;
em_metrics = face->phy_font.metrics_resolution;
em_outline = face->phy_font.outline_resolution;
if ( em_metrics != em_outline )
advance = FT_MulDiv( advance, em_outline, em_metrics );
if ( face->phy_font.flags & PFR_PHY_VERTICAL )
metrics->vertAdvance = advance;
else
metrics->horiAdvance = advance;
slot->root.linearHoriAdvance = metrics->horiAdvance;
slot->root.linearVertAdvance = metrics->vertAdvance;
/* make-up vertical metrics(?) */
metrics->vertBearingX = 0;
metrics->vertBearingY = 0;
/* scale when needed */
if ( scaling )
{
FT_Int n;
FT_Fixed x_scale = size->root.metrics.x_scale;
FT_Fixed y_scale = size->root.metrics.y_scale;
FT_Vector* vec = outline->points;
/* scale outline points */
for ( n = 0; n < outline->n_points; n++, vec++ )
{
vec->x = FT_MulFix( vec->x, x_scale );
vec->y = FT_MulFix( vec->y, y_scale );
}
/* scale the advance */
metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale );
}
/* compute the rest of the metrics */
FT_Outline_Get_CBox( outline, &cbox );
metrics->width = cbox.xMax - cbox.xMin;
metrics->height = cbox.yMax - cbox.yMin;
metrics->horiBearingX = cbox.xMin;
metrics->horiBearingY = cbox.yMax - metrics->height;
}
Exit:
return error;
}
void SkScalerContext_FreeType_Base::generateGlyphImage(
FT_Face face,
const SkGlyph& glyph,
const SkMatrix& bitmapTransform)
{
const bool doBGR = SkToBool(fRec.fFlags & SkScalerContext::kLCD_BGROrder_Flag);
const bool doVert = SkToBool(fRec.fFlags & SkScalerContext::kLCD_Vertical_Flag);
switch ( face->glyph->format ) {
case FT_GLYPH_FORMAT_OUTLINE: {
FT_Outline* outline = &face->glyph->outline;
int dx = 0, dy = 0;
if (fRec.fFlags & SkScalerContext::kSubpixelPositioning_Flag) {
dx = SkFixedToFDot6(glyph.getSubXFixed());
dy = SkFixedToFDot6(glyph.getSubYFixed());
// negate dy since freetype-y-goes-up and skia-y-goes-down
dy = -dy;
}
memset(glyph.fImage, 0, glyph.rowBytes() * glyph.fHeight);
if (SkMask::kLCD16_Format == glyph.fMaskFormat) {
FT_Outline_Translate(outline, dx, dy);
FT_Error err = FT_Render_Glyph(face->glyph, doVert ? FT_RENDER_MODE_LCD_V :
FT_RENDER_MODE_LCD);
if (err) {
SK_TRACEFTR(err, "Could not render glyph.");
return;
}
SkMask mask;
glyph.toMask(&mask);
#ifdef SK_SHOW_TEXT_BLIT_COVERAGE
memset(mask.fImage, 0x80, mask.fBounds.height() * mask.fRowBytes);
#endif
FT_GlyphSlotRec& ftGlyph = *face->glyph;
if (!SkIRect::Intersects(mask.fBounds,
SkIRect::MakeXYWH( ftGlyph.bitmap_left,
-ftGlyph.bitmap_top,
ftGlyph.bitmap.width,
ftGlyph.bitmap.rows)))
{
return;
}
// If the FT_Bitmap extent is larger, discard bits of the bitmap outside the mask.
// If the SkMask extent is larger, shrink mask to fit bitmap (clearing discarded).
unsigned char* origBuffer = ftGlyph.bitmap.buffer;
// First align the top left (origin).
if (-ftGlyph.bitmap_top < mask.fBounds.fTop) {
int32_t topDiff = mask.fBounds.fTop - (-ftGlyph.bitmap_top);
ftGlyph.bitmap.buffer += ftGlyph.bitmap.pitch * topDiff;
ftGlyph.bitmap.rows -= topDiff;
ftGlyph.bitmap_top = -mask.fBounds.fTop;
}
if (ftGlyph.bitmap_left < mask.fBounds.fLeft) {
int32_t leftDiff = mask.fBounds.fLeft - ftGlyph.bitmap_left;
ftGlyph.bitmap.buffer += leftDiff;
ftGlyph.bitmap.width -= leftDiff;
ftGlyph.bitmap_left = mask.fBounds.fLeft;
}
if (mask.fBounds.fTop < -ftGlyph.bitmap_top) {
mask.fImage += mask.fRowBytes * (-ftGlyph.bitmap_top - mask.fBounds.fTop);
mask.fBounds.fTop = -ftGlyph.bitmap_top;
}
if (mask.fBounds.fLeft < ftGlyph.bitmap_left) {
mask.fImage += sizeof(uint16_t) * (ftGlyph.bitmap_left - mask.fBounds.fLeft);
mask.fBounds.fLeft = ftGlyph.bitmap_left;
}
// Origins aligned, clean up the width and height.
int ftVertScale = (doVert ? 3 : 1);
int ftHoriScale = (doVert ? 1 : 3);
if (mask.fBounds.height() * ftVertScale < SkToInt(ftGlyph.bitmap.rows)) {
ftGlyph.bitmap.rows = mask.fBounds.height() * ftVertScale;
}
if (mask.fBounds.width() * ftHoriScale < SkToInt(ftGlyph.bitmap.width)) {
ftGlyph.bitmap.width = mask.fBounds.width() * ftHoriScale;
}
if (SkToInt(ftGlyph.bitmap.rows) < mask.fBounds.height() * ftVertScale) {
mask.fBounds.fBottom = mask.fBounds.fTop + ftGlyph.bitmap.rows / ftVertScale;
}
if (SkToInt(ftGlyph.bitmap.width) < mask.fBounds.width() * ftHoriScale) {
mask.fBounds.fRight = mask.fBounds.fLeft + ftGlyph.bitmap.width / ftHoriScale;
}
if (fPreBlend.isApplicable()) {
copyFT2LCD16<true>(ftGlyph.bitmap, mask, doBGR,
fPreBlend.fR, fPreBlend.fG, fPreBlend.fB);
} else {
copyFT2LCD16<false>(ftGlyph.bitmap, mask, doBGR,
fPreBlend.fR, fPreBlend.fG, fPreBlend.fB);
}
// Restore the buffer pointer so FreeType can properly free it.
ftGlyph.bitmap.buffer = origBuffer;
} else {
FT_BBox bbox;
FT_Bitmap target;
FT_Outline_Get_CBox(outline, &bbox);
/*
what we really want to do for subpixel is
offset(dx, dy)
compute_bounds
offset(bbox & !63)
but that is two calls to offset, so we do the following, which
achieves the same thing with only one offset call.
*/
FT_Outline_Translate(outline, dx - ((bbox.xMin + dx) & ~63),
dy - ((bbox.yMin + dy) & ~63));
target.width = glyph.fWidth;
target.rows = glyph.fHeight;
target.pitch = glyph.rowBytes();
target.buffer = reinterpret_cast<uint8_t*>(glyph.fImage);
target.pixel_mode = compute_pixel_mode( (SkMask::Format)fRec.fMaskFormat);
target.num_grays = 256;
FT_Outline_Get_Bitmap(face->glyph->library, outline, &target);
#ifdef SK_SHOW_TEXT_BLIT_COVERAGE
for (int y = 0; y < glyph.fHeight; ++y) {
for (int x = 0; x < glyph.fWidth; ++x) {
uint8_t& a = ((uint8_t*)glyph.fImage)[(glyph.rowBytes() * y) + x];
a = SkTMax<uint8_t>(a, 0x20);
}
}
#endif
}
} break;
case FT_GLYPH_FORMAT_BITMAP: {
FT_Pixel_Mode pixel_mode = static_cast<FT_Pixel_Mode>(face->glyph->bitmap.pixel_mode);
SkMask::Format maskFormat = static_cast<SkMask::Format>(glyph.fMaskFormat);
// Assume that the other formats do not exist.
SkASSERT(FT_PIXEL_MODE_MONO == pixel_mode ||
FT_PIXEL_MODE_GRAY == pixel_mode ||
FT_PIXEL_MODE_BGRA == pixel_mode);
// These are the only formats this ScalerContext should request.
SkASSERT(SkMask::kBW_Format == maskFormat ||
SkMask::kA8_Format == maskFormat ||
SkMask::kARGB32_Format == maskFormat ||
SkMask::kLCD16_Format == maskFormat);
// If no scaling needed, directly copy glyph bitmap.
if (bitmapTransform.isIdentity()) {
SkMask dstMask;
glyph.toMask(&dstMask);
copyFTBitmap(face->glyph->bitmap, dstMask);
break;
}
// Otherwise, scale the bitmap.
// Copy the FT_Bitmap into an SkBitmap (either A8 or ARGB)
SkBitmap unscaledBitmap;
// TODO: mark this as sRGB when the blits will be sRGB.
unscaledBitmap.allocPixels(SkImageInfo::Make(face->glyph->bitmap.width,
face->glyph->bitmap.rows,
SkColorType_for_FTPixelMode(pixel_mode),
kPremul_SkAlphaType));
SkMask unscaledBitmapAlias;
unscaledBitmapAlias.fImage = reinterpret_cast<uint8_t*>(unscaledBitmap.getPixels());
unscaledBitmapAlias.fBounds.set(0, 0, unscaledBitmap.width(), unscaledBitmap.height());
unscaledBitmapAlias.fRowBytes = unscaledBitmap.rowBytes();
unscaledBitmapAlias.fFormat = SkMaskFormat_for_SkColorType(unscaledBitmap.colorType());
copyFTBitmap(face->glyph->bitmap, unscaledBitmapAlias);
// Wrap the glyph's mask in a bitmap, unless the glyph's mask is BW or LCD.
// BW requires an A8 target for resizing, which can then be down sampled.
// LCD should use a 4x A8 target, which will then be down sampled.
// For simplicity, LCD uses A8 and is replicated.
int bitmapRowBytes = 0;
if (SkMask::kBW_Format != maskFormat && SkMask::kLCD16_Format != maskFormat) {
bitmapRowBytes = glyph.rowBytes();
}
SkBitmap dstBitmap;
// TODO: mark this as sRGB when the blits will be sRGB.
dstBitmap.setInfo(SkImageInfo::Make(glyph.fWidth, glyph.fHeight,
SkColorType_for_SkMaskFormat(maskFormat),
kPremul_SkAlphaType),
bitmapRowBytes);
if (SkMask::kBW_Format == maskFormat || SkMask::kLCD16_Format == maskFormat) {
dstBitmap.allocPixels();
} else {
dstBitmap.setPixels(glyph.fImage);
}
// Scale unscaledBitmap into dstBitmap.
SkCanvas canvas(dstBitmap);
#ifdef SK_SHOW_TEXT_BLIT_COVERAGE
canvas.clear(0x33FF0000);
#else
canvas.clear(SK_ColorTRANSPARENT);
#endif
canvas.translate(-glyph.fLeft, -glyph.fTop);
canvas.concat(bitmapTransform);
canvas.translate(face->glyph->bitmap_left, -face->glyph->bitmap_top);
SkPaint paint;
paint.setFilterQuality(kMedium_SkFilterQuality);
canvas.drawBitmap(unscaledBitmap, 0, 0, &paint);
// If the destination is BW or LCD, convert from A8.
if (SkMask::kBW_Format == maskFormat) {
// Copy the A8 dstBitmap into the A1 glyph.fImage.
SkMask dstMask;
glyph.toMask(&dstMask);
packA8ToA1(dstMask, dstBitmap.getAddr8(0, 0), dstBitmap.rowBytes());
} else if (SkMask::kLCD16_Format == maskFormat) {
// Copy the A8 dstBitmap into the LCD16 glyph.fImage.
uint8_t* src = dstBitmap.getAddr8(0, 0);
uint16_t* dst = reinterpret_cast<uint16_t*>(glyph.fImage);
for (int y = dstBitmap.height(); y --> 0;) {
for (int x = 0; x < dstBitmap.width(); ++x) {
dst[x] = grayToRGB16(src[x]);
}
dst = (uint16_t*)((char*)dst + glyph.rowBytes());
src += dstBitmap.rowBytes();
}
}
} break;
default:
SkDEBUGFAIL("unknown glyph format");
memset(glyph.fImage, 0, glyph.rowBytes() * glyph.fHeight);
return;
}
// We used to always do this pre-USE_COLOR_LUMINANCE, but with colorlum,
// it is optional
#if defined(SK_GAMMA_APPLY_TO_A8)
if (SkMask::kA8_Format == glyph.fMaskFormat && fPreBlend.isApplicable()) {
uint8_t* SK_RESTRICT dst = (uint8_t*)glyph.fImage;
unsigned rowBytes = glyph.rowBytes();
for (int y = glyph.fHeight - 1; y >= 0; --y) {
for (int x = glyph.fWidth - 1; x >= 0; --x) {
dst[x] = fPreBlend.fG[dst[x]];
}
dst += rowBytes;
}
}
#endif
}
/* convert a slot's glyph image into a bitmap */
static FT_Error
ft_smooth_render( FT_Renderer render,
FT_GlyphSlot slot,
FT_UInt mode,
FT_Vector* origin )
{
FT_Error error;
FT_Outline* outline = NULL;
FT_BBox cbox;
FT_UInt width, height, pitch;
FT_Bitmap* bitmap;
FT_Memory memory;
FT_Raster_Params params;
/* check glyph image format */
if ( slot->format != render->glyph_format )
{
error = Smooth_Err_Invalid_Argument;
goto Exit;
}
/* check mode */
if ( mode != ft_render_mode_normal )
return Smooth_Err_Cannot_Render_Glyph;
outline = &slot->outline;
/* translate the outline to the new origin if needed */
if ( origin )
FT_Outline_Translate( outline, origin->x, origin->y );
/* compute the control box, and grid fit it */
FT_Outline_Get_CBox( outline, &cbox );
cbox.xMin &= -64;
cbox.yMin &= -64;
cbox.xMax = ( cbox.xMax + 63 ) & -64;
cbox.yMax = ( cbox.yMax + 63 ) & -64;
width = ( cbox.xMax - cbox.xMin ) >> 6;
height = ( cbox.yMax - cbox.yMin ) >> 6;
bitmap = &slot->bitmap;
memory = render->root.memory;
/* release old bitmap buffer */
if ( slot->flags & FT_GLYPH_OWN_BITMAP )
{
FT_FREE( bitmap->buffer );
slot->flags &= ~FT_GLYPH_OWN_BITMAP;
}
/* allocate new one, depends on pixel format */
pitch = width;
bitmap->pixel_mode = ft_pixel_mode_grays;
bitmap->num_grays = 256;
bitmap->width = width;
bitmap->rows = height;
bitmap->pitch = pitch;
if ( FT_ALLOC( bitmap->buffer, (FT_ULong)pitch * height ) )
goto Exit;
slot->flags |= FT_GLYPH_OWN_BITMAP;
/* translate outline to render it into the bitmap */
FT_Outline_Translate( outline, -cbox.xMin, -cbox.yMin );
/* set up parameters */
params.target = bitmap;
params.source = outline;
params.flags = ft_raster_flag_aa;
/* render outline into the bitmap */
error = render->raster_render( render->raster, ¶ms );
FT_Outline_Translate( outline, cbox.xMin, cbox.yMin );
if ( error )
goto Exit;
slot->format = ft_glyph_format_bitmap;
slot->bitmap_left = cbox.xMin >> 6;
slot->bitmap_top = cbox.yMax >> 6;
Exit:
if ( outline && origin )
FT_Outline_Translate( outline, -origin->x, -origin->y );
return error;
}
cid_slot_load_glyph( FT_GlyphSlot cidglyph, /* CID_GlyphSlot */
FT_Size cidsize, /* CID_Size */
FT_UInt glyph_index,
FT_Int32 load_flags )
{
CID_GlyphSlot glyph = (CID_GlyphSlot)cidglyph;
FT_Error error;
T1_DecoderRec decoder;
CID_Face face = (CID_Face)cidglyph->face;
FT_Bool hinting;
PSAux_Service psaux = (PSAux_Service)face->psaux;
FT_Matrix font_matrix;
FT_Vector font_offset;
if ( glyph_index >= (FT_UInt)face->root.num_glyphs )
{
error = CID_Err_Invalid_Argument;
goto Exit;
}
if ( load_flags & FT_LOAD_NO_RECURSE )
load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;
glyph->x_scale = cidsize->metrics.x_scale;
glyph->y_scale = cidsize->metrics.y_scale;
cidglyph->outline.n_points = 0;
cidglyph->outline.n_contours = 0;
hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 &&
( load_flags & FT_LOAD_NO_HINTING ) == 0 );
cidglyph->format = FT_GLYPH_FORMAT_OUTLINE;
error = psaux->t1_decoder_funcs->init( &decoder,
cidglyph->face,
cidsize,
cidglyph,
0, /* glyph names -- XXX */
0, /* blend == 0 */
hinting,
FT_LOAD_TARGET_MODE( load_flags ),
cid_load_glyph );
if ( error )
goto Exit;
/* TODO: initialize decoder.len_buildchar and decoder.buildchar */
/* if we ever support CID-keyed multiple master fonts */
/* set up the decoder */
decoder.builder.no_recurse = FT_BOOL(
( ( load_flags & FT_LOAD_NO_RECURSE ) != 0 ) );
error = cid_load_glyph( &decoder, glyph_index );
if ( error )
goto Exit;
font_matrix = decoder.font_matrix;
font_offset = decoder.font_offset;
/* save new glyph tables */
psaux->t1_decoder_funcs->done( &decoder );
/* now set the metrics -- this is rather simple, as */
/* the left side bearing is the xMin, and the top side */
/* bearing the yMax */
cidglyph->outline.flags &= FT_OUTLINE_OWNER;
cidglyph->outline.flags |= FT_OUTLINE_REVERSE_FILL;
/* for composite glyphs, return only left side bearing and */
/* advance width */
if ( load_flags & FT_LOAD_NO_RECURSE )
{
FT_Slot_Internal internal = cidglyph->internal;
cidglyph->metrics.horiBearingX =
FIXED_TO_INT( decoder.builder.left_bearing.x );
cidglyph->metrics.horiAdvance =
FIXED_TO_INT( decoder.builder.advance.x );
internal->glyph_matrix = font_matrix;
internal->glyph_delta = font_offset;
internal->glyph_transformed = 1;
}
else
{
FT_BBox cbox;
FT_Glyph_Metrics* metrics = &cidglyph->metrics;
FT_Vector advance;
/* copy the _unscaled_ advance width */
metrics->horiAdvance =
FIXED_TO_INT( decoder.builder.advance.x );
cidglyph->linearHoriAdvance =
FIXED_TO_INT( decoder.builder.advance.x );
cidglyph->internal->glyph_transformed = 0;
/* make up vertical ones */
metrics->vertAdvance = ( face->cid.font_bbox.yMax -
face->cid.font_bbox.yMin ) >> 16;
cidglyph->linearVertAdvance = metrics->vertAdvance;
cidglyph->format = FT_GLYPH_FORMAT_OUTLINE;
if ( cidsize->metrics.y_ppem < 24 )
cidglyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION;
/* apply the font matrix */
FT_Outline_Transform( &cidglyph->outline, &font_matrix );
FT_Outline_Translate( &cidglyph->outline,
font_offset.x,
font_offset.y );
advance.x = metrics->horiAdvance;
advance.y = 0;
FT_Vector_Transform( &advance, &font_matrix );
metrics->horiAdvance = advance.x + font_offset.x;
advance.x = 0;
advance.y = metrics->vertAdvance;
FT_Vector_Transform( &advance, &font_matrix );
metrics->vertAdvance = advance.y + font_offset.y;
if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 )
{
/* scale the outline and the metrics */
FT_Int n;
FT_Outline* cur = decoder.builder.base;
FT_Vector* vec = cur->points;
FT_Fixed x_scale = glyph->x_scale;
FT_Fixed y_scale = glyph->y_scale;
/* First of all, scale the points */
if ( !hinting || !decoder.builder.hints_funcs )
for ( n = cur->n_points; n > 0; n--, vec++ )
{
vec->x = FT_MulFix( vec->x, x_scale );
vec->y = FT_MulFix( vec->y, y_scale );
}
/* Then scale the metrics */
metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale );
}
/* compute the other metrics */
FT_Outline_Get_CBox( &cidglyph->outline, &cbox );
metrics->width = cbox.xMax - cbox.xMin;
metrics->height = cbox.yMax - cbox.yMin;
metrics->horiBearingX = cbox.xMin;
metrics->horiBearingY = cbox.yMax;
if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
{
/* make up vertical ones */
ft_synthesize_vertical_metrics( metrics,
metrics->vertAdvance );
}
}
Exit:
return error;
}
static FT_Error
af_loader_load_g( AF_Loader loader,
AF_Scaler scaler,
FT_UInt glyph_index,
FT_Int32 load_flags,
FT_UInt depth )
{
FT_Error error;
FT_Face face = loader->face;
FT_GlyphLoader gloader = loader->gloader;
AF_ScriptMetrics metrics = loader->metrics;
AF_GlyphHints hints = &loader->hints;
FT_GlyphSlot slot = face->glyph;
FT_Slot_Internal internal = slot->internal;
FT_Int32 flags;
flags = load_flags | FT_LOAD_LINEAR_DESIGN;
error = FT_Load_Glyph( face, glyph_index, flags );
if ( error )
goto Exit;
loader->transformed = internal->glyph_transformed;
if ( loader->transformed )
{
FT_Matrix inverse;
loader->trans_matrix = internal->glyph_matrix;
loader->trans_delta = internal->glyph_delta;
inverse = loader->trans_matrix;
FT_Matrix_Invert( &inverse );
FT_Vector_Transform( &loader->trans_delta, &inverse );
}
switch ( slot->format )
{
case FT_GLYPH_FORMAT_OUTLINE:
/* translate the loaded glyph when an internal transform is needed */
if ( loader->transformed )
FT_Outline_Translate( &slot->outline,
loader->trans_delta.x,
loader->trans_delta.y );
/* copy the outline points in the loader's current */
/* extra points which are used to keep original glyph coordinates */
error = FT_GLYPHLOADER_CHECK_POINTS( gloader,
slot->outline.n_points + 4,
slot->outline.n_contours );
if ( error )
goto Exit;
FT_ARRAY_COPY( gloader->current.outline.points,
slot->outline.points,
slot->outline.n_points );
FT_ARRAY_COPY( gloader->current.outline.contours,
slot->outline.contours,
slot->outline.n_contours );
FT_ARRAY_COPY( gloader->current.outline.tags,
slot->outline.tags,
slot->outline.n_points );
gloader->current.outline.n_points = slot->outline.n_points;
gloader->current.outline.n_contours = slot->outline.n_contours;
/* compute original horizontal phantom points (and ignore */
/* vertical ones) */
loader->pp1.x = hints->x_delta;
loader->pp1.y = hints->y_delta;
loader->pp2.x = FT_MulFix( slot->metrics.horiAdvance,
hints->x_scale ) + hints->x_delta;
loader->pp2.y = hints->y_delta;
/* be sure to check for spacing glyphs */
if ( slot->outline.n_points == 0 )
goto Hint_Metrics;
/* now load the slot image into the auto-outline and run the */
/* automatic hinting process */
if ( metrics->clazz->script_hints_apply )
metrics->clazz->script_hints_apply( hints,
&gloader->current.outline,
metrics );
/* we now need to adjust the metrics according to the change in */
/* width/positioning that occurred during the hinting process */
if ( scaler->render_mode != FT_RENDER_MODE_LIGHT )
{
FT_Pos old_rsb, old_lsb, new_lsb;
FT_Pos pp1x_uh, pp2x_uh;
AF_AxisHints axis = &hints->axis[AF_DIMENSION_HORZ];
AF_Edge edge1 = axis->edges; /* leftmost edge */
AF_Edge edge2 = edge1 +
axis->num_edges - 1; /* rightmost edge */
if ( axis->num_edges > 1 && AF_HINTS_DO_ADVANCE( hints ) )
{
old_rsb = loader->pp2.x - edge2->opos;
old_lsb = edge1->opos;
new_lsb = edge1->pos;
/* remember unhinted values to later account */
/* for rounding errors */
pp1x_uh = new_lsb - old_lsb;
pp2x_uh = edge2->pos + old_rsb;
/* prefer too much space over too little space */
/* for very small sizes */
if ( old_lsb < 24 )
pp1x_uh -= 8;
if ( old_rsb < 24 )
pp2x_uh += 8;
loader->pp1.x = FT_PIX_ROUND( pp1x_uh );
loader->pp2.x = FT_PIX_ROUND( pp2x_uh );
if ( loader->pp1.x >= new_lsb && old_lsb > 0 )
loader->pp1.x -= 64;
if ( loader->pp2.x <= edge2->pos && old_rsb > 0 )
loader->pp2.x += 64;
slot->lsb_delta = loader->pp1.x - pp1x_uh;
slot->rsb_delta = loader->pp2.x - pp2x_uh;
}
else
{
FT_Pos pp1x = loader->pp1.x;
FT_Pos pp2x = loader->pp2.x;
loader->pp1.x = FT_PIX_ROUND( pp1x );
loader->pp2.x = FT_PIX_ROUND( pp2x );
slot->lsb_delta = loader->pp1.x - pp1x;
slot->rsb_delta = loader->pp2.x - pp2x;
}
}
else
{
FT_Pos pp1x = loader->pp1.x;
FT_Pos pp2x = loader->pp2.x;
loader->pp1.x = FT_PIX_ROUND( pp1x + hints->xmin_delta );
loader->pp2.x = FT_PIX_ROUND( pp2x + hints->xmax_delta );
slot->lsb_delta = loader->pp1.x - pp1x;
slot->rsb_delta = loader->pp2.x - pp2x;
}
/* good, we simply add the glyph to our loader's base */
FT_GlyphLoader_Add( gloader );
break;
case FT_GLYPH_FORMAT_COMPOSITE:
{
FT_UInt nn, num_subglyphs = slot->num_subglyphs;
FT_UInt num_base_subgs, start_point;
FT_SubGlyph subglyph;
start_point = gloader->base.outline.n_points;
/* first of all, copy the subglyph descriptors in the glyph loader */
error = FT_GlyphLoader_CheckSubGlyphs( gloader, num_subglyphs );
if ( error )
goto Exit;
FT_ARRAY_COPY( gloader->current.subglyphs,
slot->subglyphs,
num_subglyphs );
gloader->current.num_subglyphs = num_subglyphs;
num_base_subgs = gloader->base.num_subglyphs;
/* now read each subglyph independently */
for ( nn = 0; nn < num_subglyphs; nn++ )
{
FT_Vector pp1, pp2;
FT_Pos x, y;
FT_UInt num_points, num_new_points, num_base_points;
/* gloader.current.subglyphs can change during glyph loading due */
/* to re-allocation -- we must recompute the current subglyph on */
/* each iteration */
subglyph = gloader->base.subglyphs + num_base_subgs + nn;
pp1 = loader->pp1;
pp2 = loader->pp2;
num_base_points = gloader->base.outline.n_points;
error = af_loader_load_g( loader, scaler, subglyph->index,
load_flags, depth + 1 );
if ( error )
goto Exit;
/* recompute subglyph pointer */
subglyph = gloader->base.subglyphs + num_base_subgs + nn;
if ( subglyph->flags & FT_SUBGLYPH_FLAG_USE_MY_METRICS )
{
pp1 = loader->pp1;
pp2 = loader->pp2;
}
else
{
loader->pp1 = pp1;
loader->pp2 = pp2;
}
num_points = gloader->base.outline.n_points;
num_new_points = num_points - num_base_points;
/* now perform the transformation required for this subglyph */
if ( subglyph->flags & ( FT_SUBGLYPH_FLAG_SCALE |
FT_SUBGLYPH_FLAG_XY_SCALE |
FT_SUBGLYPH_FLAG_2X2 ) )
{
FT_Vector* cur = gloader->base.outline.points +
num_base_points;
FT_Vector* limit = cur + num_new_points;
for ( ; cur < limit; cur++ )
FT_Vector_Transform( cur, &subglyph->transform );
}
/* apply offset */
if ( !( subglyph->flags & FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES ) )
{
FT_Int k = subglyph->arg1;
FT_UInt l = subglyph->arg2;
FT_Vector* p1;
FT_Vector* p2;
if ( start_point + k >= num_base_points ||
l >= (FT_UInt)num_new_points )
{
error = AF_Err_Invalid_Composite;
goto Exit;
}
l += num_base_points;
/* for now, only use the current point coordinates; */
/* we eventually may consider another approach */
p1 = gloader->base.outline.points + start_point + k;
p2 = gloader->base.outline.points + start_point + l;
x = p1->x - p2->x;
y = p1->y - p2->y;
}
else
{
x = FT_MulFix( subglyph->arg1, hints->x_scale ) + hints->x_delta;
y = FT_MulFix( subglyph->arg2, hints->y_scale ) + hints->y_delta;
x = FT_PIX_ROUND( x );
y = FT_PIX_ROUND( y );
}
{
FT_Outline dummy = gloader->base.outline;
dummy.points += num_base_points;
dummy.n_points = (short)num_new_points;
FT_Outline_Translate( &dummy, x, y );
}
}
}
break;
default:
/* we don't support other formats (yet?) */
error = AF_Err_Unimplemented_Feature;
}
Hint_Metrics:
if ( depth == 0 )
{
FT_BBox bbox;
FT_Vector vvector;
vvector.x = slot->metrics.vertBearingX - slot->metrics.horiBearingX;
vvector.y = slot->metrics.vertBearingY - slot->metrics.horiBearingY;
vvector.x = FT_MulFix( vvector.x, metrics->scaler.x_scale );
vvector.y = FT_MulFix( vvector.y, metrics->scaler.y_scale );
/* transform the hinted outline if needed */
if ( loader->transformed )
{
FT_Outline_Transform( &gloader->base.outline, &loader->trans_matrix );
FT_Vector_Transform( &vvector, &loader->trans_matrix );
}
#if 1
/* we must translate our final outline by -pp1.x and compute */
/* the new metrics */
if ( loader->pp1.x )
FT_Outline_Translate( &gloader->base.outline, -loader->pp1.x, 0 );
#endif
FT_Outline_Get_CBox( &gloader->base.outline, &bbox );
bbox.xMin = FT_PIX_FLOOR( bbox.xMin );
bbox.yMin = FT_PIX_FLOOR( bbox.yMin );
bbox.xMax = FT_PIX_CEIL( bbox.xMax );
bbox.yMax = FT_PIX_CEIL( bbox.yMax );
slot->metrics.width = bbox.xMax - bbox.xMin;
slot->metrics.height = bbox.yMax - bbox.yMin;
slot->metrics.horiBearingX = bbox.xMin;
slot->metrics.horiBearingY = bbox.yMax;
slot->metrics.vertBearingX = FT_PIX_FLOOR( bbox.xMin + vvector.x );
slot->metrics.vertBearingY = FT_PIX_FLOOR( bbox.yMax + vvector.y );
/* for mono-width fonts (like Andale, Courier, etc.) we need */
/* to keep the original rounded advance width; ditto for */
/* digits if all have the same advance width */
#if 0
if ( !FT_IS_FIXED_WIDTH( slot->face ) )
slot->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;
else
slot->metrics.horiAdvance = FT_MulFix( slot->metrics.horiAdvance,
x_scale );
#else
if ( scaler->render_mode != FT_RENDER_MODE_LIGHT &&
( FT_IS_FIXED_WIDTH( slot->face ) ||
( af_face_globals_is_digit( loader->globals, glyph_index ) &&
metrics->digits_have_same_width ) ) )
{
slot->metrics.horiAdvance = FT_MulFix( slot->metrics.horiAdvance,
metrics->scaler.x_scale );
/* Set delta values to 0. Otherwise code that uses them is */
/* going to ruin the fixed advance width. */
slot->lsb_delta = 0;
slot->rsb_delta = 0;
}
else
{
/* non-spacing glyphs must stay as-is */
if ( slot->metrics.horiAdvance )
slot->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;
}
#endif
slot->metrics.vertAdvance = FT_MulFix( slot->metrics.vertAdvance,
metrics->scaler.y_scale );
slot->metrics.horiAdvance = FT_PIX_ROUND( slot->metrics.horiAdvance );
slot->metrics.vertAdvance = FT_PIX_ROUND( slot->metrics.vertAdvance );
/* now copy outline into glyph slot */
FT_GlyphLoader_Rewind( internal->loader );
error = FT_GlyphLoader_CopyPoints( internal->loader, gloader );
if ( error )
goto Exit;
/* reassign all outline fields except flags to protect them */
slot->outline.n_contours = internal->loader->base.outline.n_contours;
slot->outline.n_points = internal->loader->base.outline.n_points;
slot->outline.points = internal->loader->base.outline.points;
slot->outline.tags = internal->loader->base.outline.tags;
slot->outline.contours = internal->loader->base.outline.contours;
slot->format = FT_GLYPH_FORMAT_OUTLINE;
}
Exit:
return error;
}
/* convert a slot's glyph image into a bitmap */
static FT_Error
ft_smooth_render_generic( FT_Renderer render,
FT_GlyphSlot slot,
FT_Render_Mode mode,
const FT_Vector* origin,
FT_Render_Mode required_mode )
{
FT_Error error;
FT_Outline* outline = NULL;
FT_BBox cbox;
FT_UInt width, height, height_org, width_org, pitch;
FT_Bitmap* bitmap;
FT_Memory memory;
FT_Int hmul = mode == FT_RENDER_MODE_LCD;
FT_Int vmul = mode == FT_RENDER_MODE_LCD_V;
FT_Pos x_shift, y_shift, x_left, y_top;
FT_Raster_Params params;
/* check glyph image format */
if ( slot->format != render->glyph_format )
{
error = Smooth_Err_Invalid_Argument;
goto Exit;
}
/* check mode */
if ( mode != required_mode )
return Smooth_Err_Cannot_Render_Glyph;
outline = &slot->outline;
/* translate the outline to the new origin if needed */
if ( origin )
FT_Outline_Translate( outline, origin->x, origin->y );
/* compute the control box, and grid fit it */
FT_Outline_Get_CBox( outline, &cbox );
cbox.xMin = FT_PIX_FLOOR( cbox.xMin );
cbox.yMin = FT_PIX_FLOOR( cbox.yMin );
cbox.xMax = FT_PIX_CEIL( cbox.xMax );
cbox.yMax = FT_PIX_CEIL( cbox.yMax );
width = (FT_UInt)( ( cbox.xMax - cbox.xMin ) >> 6 );
height = (FT_UInt)( ( cbox.yMax - cbox.yMin ) >> 6 );
bitmap = &slot->bitmap;
memory = render->root.memory;
width_org = width;
height_org = height;
/* release old bitmap buffer */
if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP )
{
FT_FREE( bitmap->buffer );
slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP;
}
/* allocate new one */
pitch = width;
if ( hmul )
{
width = width * 3;
pitch = FT_PAD_CEIL( width, 4 );
}
if ( vmul )
height *= 3;
x_shift = (FT_Int) cbox.xMin;
y_shift = (FT_Int) cbox.yMin;
x_left = (FT_Int)( cbox.xMin >> 6 );
y_top = (FT_Int)( cbox.yMax >> 6 );
#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
if ( slot->library->lcd_filter_func )
{
FT_Int extra = slot->library->lcd_extra;
if ( hmul )
{
x_shift -= 64 * ( extra >> 1 );
width += 3 * extra;
pitch = FT_PAD_CEIL( width, 4 );
x_left -= extra >> 1;
}
if ( vmul )
{
y_shift -= 64 * ( extra >> 1 );
height += 3 * extra;
y_top += extra >> 1;
}
}
FT_LOCAL_DEF FT_Error
CID_Load_Glyph( CID_GlyphSlot glyph,
CID_Size size,
FT_Int glyph_index,
FT_Int load_flags )
{
FT_Error error;
T1_Decoder decoder;
CID_Face face = (CID_Face)glyph->root.face;
FT_Bool hinting;
PSAux_Interface* psaux = (PSAux_Interface*)face->psaux;
FT_Matrix font_matrix;
FT_Vector font_offset;
if ( load_flags & FT_LOAD_NO_RECURSE )
load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;
glyph->x_scale = size->root.metrics.x_scale;
glyph->y_scale = size->root.metrics.y_scale;
glyph->root.outline.n_points = 0;
glyph->root.outline.n_contours = 0;
hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 &&
( load_flags & FT_LOAD_NO_HINTING ) == 0 );
glyph->root.format = ft_glyph_format_outline;
{
error = psaux->t1_decoder_funcs->init( &decoder,
(FT_Face)face,
(FT_Size)size,
(FT_GlyphSlot)glyph,
0, /* glyph names -- XXX */
0, /* blend == 0 */
hinting,
cid_load_glyph );
/* set up the decoder */
decoder.builder.no_recurse = FT_BOOL(
( ( load_flags & FT_LOAD_NO_RECURSE ) != 0 ) );
error = cid_load_glyph( &decoder, glyph_index );
font_matrix = decoder.font_matrix;
font_offset = decoder.font_offset;
/* save new glyph tables */
psaux->t1_decoder_funcs->done( &decoder );
}
/* now, set the metrics -- this is rather simple, as */
/* the left side bearing is the xMin, and the top side */
/* bearing the yMax */
if ( !error )
{
glyph->root.outline.flags &= ft_outline_owner;
glyph->root.outline.flags |= ft_outline_reverse_fill;
/* for composite glyphs, return only left side bearing and */
/* advance width */
if ( load_flags & FT_LOAD_NO_RECURSE )
{
FT_Slot_Internal internal = glyph->root.internal;
glyph->root.metrics.horiBearingX = decoder.builder.left_bearing.x;
glyph->root.metrics.horiAdvance = decoder.builder.advance.x;
internal->glyph_matrix = font_matrix;
internal->glyph_delta = font_offset;
internal->glyph_transformed = 1;
}
else
{
FT_BBox cbox;
FT_Glyph_Metrics* metrics = &glyph->root.metrics;
/* copy the _unscaled_ advance width */
metrics->horiAdvance = decoder.builder.advance.x;
glyph->root.linearHoriAdvance = decoder.builder.advance.x;
glyph->root.internal->glyph_transformed = 0;
/* make up vertical metrics */
metrics->vertBearingX = 0;
metrics->vertBearingY = 0;
metrics->vertAdvance = 0;
glyph->root.linearVertAdvance = 0;
glyph->root.format = ft_glyph_format_outline;
if ( size && size->root.metrics.y_ppem < 24 )
glyph->root.outline.flags |= ft_outline_high_precision;
/* apply the font matrix */
FT_Outline_Transform( &glyph->root.outline, &font_matrix );
FT_Outline_Translate( &glyph->root.outline,
font_offset.x,
font_offset.y );
if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 )
{
/* scale the outline and the metrics */
FT_Int n;
FT_Outline* cur = decoder.builder.base;
FT_Vector* vec = cur->points;
FT_Fixed x_scale = glyph->x_scale;
FT_Fixed y_scale = glyph->y_scale;
/* First of all, scale the points */
if ( !hinting )
for ( n = cur->n_points; n > 0; n--, vec++ )
{
vec->x = FT_MulFix( vec->x, x_scale );
vec->y = FT_MulFix( vec->y, y_scale );
}
FT_Outline_Get_CBox( &glyph->root.outline, &cbox );
/* Then scale the metrics */
metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale );
metrics->vertBearingX = FT_MulFix( metrics->vertBearingX, x_scale );
metrics->vertBearingY = FT_MulFix( metrics->vertBearingY, y_scale );
if ( hinting )
{
metrics->horiAdvance = ( metrics->horiAdvance + 32 ) & -64;
metrics->vertAdvance = ( metrics->vertAdvance + 32 ) & -64;
metrics->vertBearingX = ( metrics->vertBearingX + 32 ) & -64;
metrics->vertBearingY = ( metrics->vertBearingY + 32 ) & -64;
}
}
/* compute the other metrics */
FT_Outline_Get_CBox( &glyph->root.outline, &cbox );
/* grid fit the bounding box if necessary */
if ( hinting )
{
cbox.xMin &= -64;
cbox.yMin &= -64;
cbox.xMax = ( cbox.xMax + 63 ) & -64;
cbox.yMax = ( cbox.yMax + 63 ) & -64;
}
metrics->width = cbox.xMax - cbox.xMin;
metrics->height = cbox.yMax - cbox.yMin;
metrics->horiBearingX = cbox.xMin;
metrics->horiBearingY = cbox.yMax;
}
}
return error;
}
void TtfFont::PlotString(const std::string &str,
SBezierList *sbl, Vector origin, Vector u, Vector v)
{
ssassert(fontFace != NULL, "Expected font face to be loaded");
FT_Pos dx = 0;
for(char32_t chr : ReadUTF8(str)) {
uint32_t gid = FT_Get_Char_Index(fontFace, chr);
if (gid == 0) {
dbp("freetype: CID-to-GID mapping for CID 0x%04x failed: %s; using CID as GID",
chr, ft_error_string(gid));
}
FT_F26Dot6 scale = fontFace->units_per_EM;
if(int fterr = FT_Set_Char_Size(fontFace, scale, scale, 72, 72)) {
dbp("freetype: cannot set character size: %s",
ft_error_string(fterr));
return;
}
/*
* Stupid hacks:
* - if we want fake-bold, use FT_Outline_Embolden(). This actually looks
* quite good.
* - if we want fake-italic, apply a shear transform [1 s s 1 0 0] here using
* FT_Set_Transform. This looks decent at small font sizes and bad at larger
* ones, antialiasing mitigates this considerably though.
*/
if(int fterr = FT_Load_Glyph(fontFace, gid, FT_LOAD_NO_BITMAP | FT_LOAD_NO_HINTING)) {
dbp("freetype: cannot load glyph (gid %d): %s",
gid, ft_error_string(fterr));
return;
}
/* A point that has x = xMin should be plotted at (dx0 + lsb); fix up
* our x-position so that the curve-generating code will put stuff
* at the right place.
*
* There's no point in getting the glyph BBox here - not only can it be
* needlessly slow sometimes, but because we're about to render a single glyph,
* what we want actually *is* the CBox.
*
* This is notwithstanding that this makes extremely little sense, this
* looks like a workaround for either mishandling the start glyph on a line,
* or as a really hacky pseudo-track-kerning (in which case it works better than
* one would expect! especially since most fonts don't set track kerning).
*/
FT_BBox cbox;
FT_Outline_Get_CBox(&fontFace->glyph->outline, &cbox);
FT_Pos bx = dx - cbox.xMin;
// Yes, this is what FreeType calls left-side bearing.
// Then interchangeably uses that with "left-side bearing". Sigh.
bx += fontFace->glyph->metrics.horiBearingX;
OutlineData data = {};
data.origin = origin;
data.u = u;
data.v = v;
data.beziers = sbl;
data.factor = 1.0f/(float)scale;
data.bx = bx;
if(int fterr = FT_Outline_Decompose(&fontFace->glyph->outline, &outline_funcs, &data)) {
dbp("freetype: bezier decomposition failed (gid %d): %s",
gid, ft_error_string(fterr));
}
// And we're done, so advance our position by the requested advance
// width, plus the user-requested extra advance.
dx += fontFace->glyph->advance.x;
}
}
GlyphData* getGlyphData(Font font, const unsigned int glyphIndex)
{
GlyphMap::iterator it = font->mGlyphs.find(glyphIndex);
GlyphData* tempGlyph = (it!= font->mGlyphs.end())?&it->second:0;
if (NULL==tempGlyph)
{
FT_Error err = FT_Load_Glyph(font->ftFace, glyphIndex, FT_LOAD_NO_HINTING);
FT_GlyphSlot ftGlyph = font->ftFace->glyph;
if (!err && ftGlyph)
{
err = FT_Render_Glyph(ftGlyph, FT_RENDER_MODE_NORMAL);
if (!err && ftGlyph->format == FT_GLYPH_FORMAT_BITMAP)
{
if (font->textureIDList.empty())
{
font->textureIDList.push_back(createTexture());
font->xOffset = font->yOffset = font->padding;
}
if (font->xOffset > (TEXTURE_WIDTH-font->glyphWidth))
{
font->xOffset = font->padding;
font->yOffset += font->glyphHeight;
if (font->yOffset > (TEXTURE_HEIGHT - font->glyphHeight))
{
font->textureIDList.push_back(createTexture());
font->yOffset = font->padding;
}
}
tempGlyph = &font->mGlyphs[glyphIndex];
tempGlyph->glTextureID = font->textureIDList.back();
FT_BBox bbox;
FT_Outline_Get_CBox(&(ftGlyph->outline), &bbox);
tempGlyph->xmin = (float)(bbox.xMin)/64.0f;
tempGlyph->ymin = (float)(bbox.yMin)/64.0f;
tempGlyph->xmax = (float)(bbox.xMax)/64.0f;
tempGlyph->ymax = (float)(bbox.yMax)/64.0f;
tempGlyph->xadvance = ftGlyph->advance.x/64.0f;
tempGlyph->yadvance = ftGlyph->advance.y/64.0f;
FT_Bitmap bitmap = ftGlyph->bitmap;
tempGlyph->width = bitmap.width;
tempGlyph->height = bitmap.rows;
if( tempGlyph->width && tempGlyph->height)
{
glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glBindTexture(GL_TEXTURE_2D, tempGlyph->glTextureID);
glTexSubImage2D(
GL_TEXTURE_2D, 0,
font->xOffset, font->yOffset,
tempGlyph->width, tempGlyph->height,
GL_ALPHA, GL_UNSIGNED_BYTE,
bitmap.buffer
);
glPopClientAttrib();
}
tempGlyph->u0 = (float)(font->xOffset)/(float)(TEXTURE_WIDTH);
tempGlyph->v0 = (float)(font->yOffset)/(float)(TEXTURE_HEIGHT);
tempGlyph->u1 = (float)(font->xOffset+tempGlyph->width) / (float)(TEXTURE_WIDTH);
tempGlyph->v1 = (float)(font->yOffset+tempGlyph->height) / (float)(TEXTURE_HEIGHT);
tempGlyph->xoffset = (float)ftGlyph->bitmap_left;
tempGlyph->yoffset = (float)ftGlyph->bitmap_top;
font->xOffset += tempGlyph->xmax - tempGlyph->xmin + font->padding;
}
}
}
return tempGlyph;
}
af_loader_load_glyph( AF_Loader loader,
AF_Module module,
FT_Face face,
FT_UInt glyph_index,
FT_Int32 load_flags )
{
FT_Error error;
FT_Size size = face->size;
FT_Size_Internal size_internal = size->internal;
FT_GlyphSlot slot = face->glyph;
FT_Slot_Internal slot_internal = slot->internal;
FT_GlyphLoader gloader = slot_internal->loader;
AF_GlyphHints hints = loader->hints;
AF_ScalerRec scaler;
AF_StyleMetrics style_metrics;
FT_UInt style_options = AF_STYLE_NONE_DFLT;
AF_StyleClass style_class;
AF_WritingSystemClass writing_system_class;
if ( !size )
return FT_THROW( Invalid_Size_Handle );
FT_ZERO( &scaler );
if ( !size_internal->autohint_metrics.x_scale ||
size_internal->autohint_mode != FT_LOAD_TARGET_MODE( load_flags ) )
{
/* switching between hinting modes usually means different scaling */
/* values; this later on enforces recomputation of everything */
/* related to the current size */
size_internal->autohint_mode = FT_LOAD_TARGET_MODE( load_flags );
size_internal->autohint_metrics = size->metrics;
#ifdef AF_CONFIG_OPTION_TT_SIZE_METRICS
{
FT_Size_Metrics* size_metrics = &size_internal->autohint_metrics;
/* set metrics to integer values and adjust scaling accordingly; */
/* this is the same setup as with TrueType fonts, cf. function */
/* `tt_size_reset' in file `ttobjs.c' */
size_metrics->ascender = FT_PIX_ROUND(
FT_MulFix( face->ascender,
size_metrics->y_scale ) );
size_metrics->descender = FT_PIX_ROUND(
FT_MulFix( face->descender,
size_metrics->y_scale ) );
size_metrics->height = FT_PIX_ROUND(
FT_MulFix( face->height,
size_metrics->y_scale ) );
size_metrics->x_scale = FT_DivFix( size_metrics->x_ppem << 6,
face->units_per_EM );
size_metrics->y_scale = FT_DivFix( size_metrics->y_ppem << 6,
face->units_per_EM );
size_metrics->max_advance = FT_PIX_ROUND(
FT_MulFix( face->max_advance_width,
size_metrics->x_scale ) );
}
#endif /* AF_CONFIG_OPTION_TT_SIZE_METRICS */
}
/*
* TODO: This code currently doesn't support fractional advance widths,
* i.e., placing hinted glyphs at anything other than integer
* x-positions. This is only relevant for the warper code, which
* scales and shifts glyphs to optimize blackness of stems (hinting on
* the x-axis by nature places things on pixel integers, hinting on the
* y-axis only, i.e., LIGHT mode, doesn't touch the x-axis). The delta
* values of the scaler would need to be adjusted.
*/
scaler.face = face;
scaler.x_scale = size_internal->autohint_metrics.x_scale;
scaler.x_delta = 0;
scaler.y_scale = size_internal->autohint_metrics.y_scale;
scaler.y_delta = 0;
scaler.render_mode = FT_LOAD_TARGET_MODE( load_flags );
scaler.flags = 0;
/* note that the fallback style can't be changed anymore */
/* after the first call of `af_loader_load_glyph' */
error = af_loader_reset( loader, module, face );
if ( error )
goto Exit;
#ifdef FT_OPTION_AUTOFIT2
/* XXX: undocumented hook to activate the latin2 writing system. */
if ( load_flags & ( 1UL << 20 ) )
style_options = AF_STYLE_LTN2_DFLT;
#endif
/*
* Glyphs (really code points) are assigned to scripts. Script
* analysis is done lazily: For each glyph that passes through here,
* the corresponding script analyzer is called, but returns immediately
* if it has been run already.
*/
error = af_face_globals_get_metrics( loader->globals, glyph_index,
style_options, &style_metrics );
if ( error )
goto Exit;
style_class = style_metrics->style_class;
writing_system_class =
af_writing_system_classes[style_class->writing_system];
loader->metrics = style_metrics;
if ( writing_system_class->style_metrics_scale )
writing_system_class->style_metrics_scale( style_metrics, &scaler );
else
style_metrics->scaler = scaler;
if ( writing_system_class->style_hints_init )
{
error = writing_system_class->style_hints_init( hints,
style_metrics );
if ( error )
goto Exit;
}
/*
* Do the main work of `af_loader_load_glyph'. Note that we never have
* to deal with composite glyphs as those get loaded into
* FT_GLYPH_FORMAT_OUTLINE by the recursed `FT_Load_Glyph' function.
* In the rare cases where FT_LOAD_NO_RECURSE is set, it implies
* FT_LOAD_NO_SCALE and as such the auto-hinter is never called.
*/
load_flags |= FT_LOAD_NO_SCALE |
FT_LOAD_IGNORE_TRANSFORM |
FT_LOAD_LINEAR_DESIGN;
load_flags &= ~FT_LOAD_RENDER;
error = FT_Load_Glyph( face, glyph_index, load_flags );
if ( error )
goto Exit;
/*
* Apply stem darkening (emboldening) here before hints are applied to
* the outline. Glyphs are scaled down proportionally to the
* emboldening so that curve points don't fall outside their
* precomputed blue zones.
*
* Any emboldening done by the font driver (e.g., the CFF driver)
* doesn't reach here because the autohinter loads the unprocessed
* glyphs in font units for analysis (functions `af_*_metrics_init_*')
* and then above to prepare it for the rasterizers by itself,
* independently of the font driver. So emboldening must be done here,
* within the autohinter.
*
* All glyphs to be autohinted pass through here one by one. The
* standard widths can therefore change from one glyph to the next,
* depending on what script a glyph is assigned to (each script has its
* own set of standard widths and other metrics). The darkening amount
* must therefore be recomputed for each size and
* `standard_{vertical,horizontal}_width' change.
*
* Ignore errors and carry on without emboldening.
*
*/
/* stem darkening only works well in `light' mode */
if ( scaler.render_mode == FT_RENDER_MODE_LIGHT &&
( !face->internal->no_stem_darkening ||
( face->internal->no_stem_darkening < 0 &&
!module->no_stem_darkening ) ) )
af_loader_embolden_glyph_in_slot( loader, face, style_metrics );
loader->transformed = slot_internal->glyph_transformed;
if ( loader->transformed )
{
FT_Matrix inverse;
loader->trans_matrix = slot_internal->glyph_matrix;
loader->trans_delta = slot_internal->glyph_delta;
inverse = loader->trans_matrix;
if ( !FT_Matrix_Invert( &inverse ) )
FT_Vector_Transform( &loader->trans_delta, &inverse );
}
switch ( slot->format )
{
case FT_GLYPH_FORMAT_OUTLINE:
/* translate the loaded glyph when an internal transform is needed */
if ( loader->transformed )
FT_Outline_Translate( &slot->outline,
loader->trans_delta.x,
loader->trans_delta.y );
/* compute original horizontal phantom points */
/* (and ignore vertical ones) */
loader->pp1.x = hints->x_delta;
loader->pp1.y = hints->y_delta;
loader->pp2.x = FT_MulFix( slot->metrics.horiAdvance,
hints->x_scale ) + hints->x_delta;
loader->pp2.y = hints->y_delta;
/* be sure to check for spacing glyphs */
if ( slot->outline.n_points == 0 )
goto Hint_Metrics;
/* now load the slot image into the auto-outline */
/* and run the automatic hinting process */
if ( writing_system_class->style_hints_apply )
{
error = writing_system_class->style_hints_apply(
glyph_index,
hints,
&gloader->base.outline,
style_metrics );
if ( error )
goto Exit;
}
/* we now need to adjust the metrics according to the change in */
/* width/positioning that occurred during the hinting process */
if ( scaler.render_mode != FT_RENDER_MODE_LIGHT )
{
AF_AxisHints axis = &hints->axis[AF_DIMENSION_HORZ];
if ( axis->num_edges > 1 && AF_HINTS_DO_ADVANCE( hints ) )
{
AF_Edge edge1 = axis->edges; /* leftmost edge */
AF_Edge edge2 = edge1 +
axis->num_edges - 1; /* rightmost edge */
FT_Pos old_rsb = loader->pp2.x - edge2->opos;
/* loader->pp1.x is always zero at this point of time */
FT_Pos old_lsb = edge1->opos; /* - loader->pp1.x */
FT_Pos new_lsb = edge1->pos;
/* remember unhinted values to later account */
/* for rounding errors */
FT_Pos pp1x_uh = new_lsb - old_lsb;
FT_Pos pp2x_uh = edge2->pos + old_rsb;
/* prefer too much space over too little space */
/* for very small sizes */
if ( old_lsb < 24 )
pp1x_uh -= 8;
if ( old_rsb < 24 )
pp2x_uh += 8;
loader->pp1.x = FT_PIX_ROUND( pp1x_uh );
loader->pp2.x = FT_PIX_ROUND( pp2x_uh );
if ( loader->pp1.x >= new_lsb && old_lsb > 0 )
loader->pp1.x -= 64;
if ( loader->pp2.x <= edge2->pos && old_rsb > 0 )
loader->pp2.x += 64;
slot->lsb_delta = loader->pp1.x - pp1x_uh;
slot->rsb_delta = loader->pp2.x - pp2x_uh;
}
else
{
FT_Pos pp1x = loader->pp1.x;
FT_Pos pp2x = loader->pp2.x;
loader->pp1.x = FT_PIX_ROUND( pp1x + hints->xmin_delta );
loader->pp2.x = FT_PIX_ROUND( pp2x + hints->xmax_delta );
slot->lsb_delta = loader->pp1.x - pp1x;
slot->rsb_delta = loader->pp2.x - pp2x;
}
}
/* `light' mode uses integer advance widths */
/* but sets `lsb_delta' and `rsb_delta' */
else
{
FT_Pos pp1x = loader->pp1.x;
FT_Pos pp2x = loader->pp2.x;
loader->pp1.x = FT_PIX_ROUND( pp1x );
loader->pp2.x = FT_PIX_ROUND( pp2x );
slot->lsb_delta = loader->pp1.x - pp1x;
slot->rsb_delta = loader->pp2.x - pp2x;
}
break;
default:
/* we don't support other formats (yet?) */
error = FT_THROW( Unimplemented_Feature );
}
Hint_Metrics:
{
FT_BBox bbox;
FT_Vector vvector;
vvector.x = slot->metrics.vertBearingX - slot->metrics.horiBearingX;
vvector.y = slot->metrics.vertBearingY - slot->metrics.horiBearingY;
vvector.x = FT_MulFix( vvector.x, style_metrics->scaler.x_scale );
vvector.y = FT_MulFix( vvector.y, style_metrics->scaler.y_scale );
/* transform the hinted outline if needed */
if ( loader->transformed )
{
FT_Outline_Transform( &gloader->base.outline, &loader->trans_matrix );
FT_Vector_Transform( &vvector, &loader->trans_matrix );
}
/* we must translate our final outline by -pp1.x and compute */
/* the new metrics */
if ( loader->pp1.x )
FT_Outline_Translate( &gloader->base.outline, -loader->pp1.x, 0 );
FT_Outline_Get_CBox( &gloader->base.outline, &bbox );
bbox.xMin = FT_PIX_FLOOR( bbox.xMin );
bbox.yMin = FT_PIX_FLOOR( bbox.yMin );
bbox.xMax = FT_PIX_CEIL( bbox.xMax );
bbox.yMax = FT_PIX_CEIL( bbox.yMax );
slot->metrics.width = bbox.xMax - bbox.xMin;
slot->metrics.height = bbox.yMax - bbox.yMin;
slot->metrics.horiBearingX = bbox.xMin;
slot->metrics.horiBearingY = bbox.yMax;
slot->metrics.vertBearingX = FT_PIX_FLOOR( bbox.xMin + vvector.x );
slot->metrics.vertBearingY = FT_PIX_FLOOR( bbox.yMax + vvector.y );
/* for mono-width fonts (like Andale, Courier, etc.) we need */
/* to keep the original rounded advance width; ditto for */
/* digits if all have the same advance width */
if ( scaler.render_mode != FT_RENDER_MODE_LIGHT &&
( FT_IS_FIXED_WIDTH( slot->face ) ||
( af_face_globals_is_digit( loader->globals, glyph_index ) &&
style_metrics->digits_have_same_width ) ) )
{
slot->metrics.horiAdvance =
FT_MulFix( slot->metrics.horiAdvance,
style_metrics->scaler.x_scale );
/* Set delta values to 0. Otherwise code that uses them is */
/* going to ruin the fixed advance width. */
slot->lsb_delta = 0;
slot->rsb_delta = 0;
}
else
{
/* non-spacing glyphs must stay as-is */
if ( slot->metrics.horiAdvance )
slot->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;
}
slot->metrics.vertAdvance = FT_MulFix( slot->metrics.vertAdvance,
style_metrics->scaler.y_scale );
slot->metrics.horiAdvance = FT_PIX_ROUND( slot->metrics.horiAdvance );
slot->metrics.vertAdvance = FT_PIX_ROUND( slot->metrics.vertAdvance );
slot->format = FT_GLYPH_FORMAT_OUTLINE;
}
Exit:
return error;
}
GlyphBLF *blf_glyph_add(FontBLF *font, unsigned int index, unsigned int c)
{
FT_GlyphSlot slot;
GlyphBLF *g;
FT_Error err;
FT_Bitmap bitmap, tempbitmap;
const bool is_sharp = (U.text_render & USER_TEXT_DISABLE_AA) != 0;
int flags = FT_LOAD_TARGET_NORMAL | FT_LOAD_NO_HINTING | FT_LOAD_NO_BITMAP;
FT_BBox bbox;
unsigned int key;
g = blf_glyph_search(font->glyph_cache, c);
if (g)
return g;
/* glyphs are dynamically created as needed by font rendering. this means that
* to make font rendering thread safe we have to do locking here. note that this
* must be a lock for the whole library and not just per font, because the font
* renderer uses a shared buffer internally */
BLI_spin_lock(font->ft_lib_mutex);
/* search again after locking */
g = blf_glyph_search(font->glyph_cache, c);
if (g) {
BLI_spin_unlock(font->ft_lib_mutex);
return g;
}
if (font->flags & BLF_HINTING)
flags &= ~FT_LOAD_NO_HINTING;
if (is_sharp)
err = FT_Load_Glyph(font->face, (FT_UInt)index, FT_LOAD_TARGET_MONO);
else
err = FT_Load_Glyph(font->face, (FT_UInt)index, flags);
if (err) {
BLI_spin_unlock(font->ft_lib_mutex);
return NULL;
}
/* get the glyph. */
slot = font->face->glyph;
if (is_sharp) {
err = FT_Render_Glyph(slot, FT_RENDER_MODE_MONO);
/* Convert result from 1 bit per pixel to 8 bit per pixel */
/* Accum errors for later, fine if not interested beyond "ok vs any error" */
FT_Bitmap_New(&tempbitmap);
err += FT_Bitmap_Convert(font->ft_lib, &slot->bitmap, &tempbitmap, 1); /* Does Blender use Pitch 1 always? It works so far */
err += FT_Bitmap_Copy(font->ft_lib, &tempbitmap, &slot->bitmap);
err += FT_Bitmap_Done(font->ft_lib, &tempbitmap);
}
else {
err = FT_Render_Glyph(slot, FT_RENDER_MODE_NORMAL);
}
if (err || slot->format != FT_GLYPH_FORMAT_BITMAP) {
BLI_spin_unlock(font->ft_lib_mutex);
return NULL;
}
g = (GlyphBLF *)MEM_callocN(sizeof(GlyphBLF), "blf_glyph_add");
g->c = c;
g->idx = (FT_UInt)index;
g->xoff = -1;
g->yoff = -1;
bitmap = slot->bitmap;
g->width = (int)bitmap.width;
g->height = (int)bitmap.rows;
if (g->width && g->height) {
if (is_sharp) {
/* Font buffer uses only 0 or 1 values, Blender expects full 0..255 range */
int i;
for (i = 0; i < (g->width * g->height); i++) {
bitmap.buffer[i] = bitmap.buffer[i] ? 255 : 0;
}
}
g->bitmap = (unsigned char *)MEM_mallocN((size_t)(g->width * g->height), "glyph bitmap");
memcpy((void *)g->bitmap, (void *)bitmap.buffer, (size_t)(g->width * g->height));
}
g->advance = ((float)slot->advance.x) / 64.0f;
g->advance_i = (int)g->advance;
g->pos_x = (float)slot->bitmap_left;
g->pos_y = (float)slot->bitmap_top;
g->pitch = slot->bitmap.pitch;
FT_Outline_Get_CBox(&(slot->outline), &bbox);
g->box.xmin = ((float)bbox.xMin) / 64.0f;
g->box.xmax = ((float)bbox.xMax) / 64.0f;
g->box.ymin = ((float)bbox.yMin) / 64.0f;
g->box.ymax = ((float)bbox.yMax) / 64.0f;
key = blf_hash(g->c);
BLI_addhead(&(font->glyph_cache->bucket[key]), g);
BLI_spin_unlock(font->ft_lib_mutex);
return g;
}
T1_Load_Glyph( FT_GlyphSlot t1glyph, /* T1_GlyphSlot */
FT_Size t1size, /* T1_Size */
FT_UInt glyph_index,
FT_Int32 load_flags )
{
T1_GlyphSlot glyph = (T1_GlyphSlot)t1glyph;
FT_Error error;
#ifdef __REACTOS__
T1_DecoderRec *decoder = malloc(sizeof(T1_DecoderRec));
if (!decoder)
return FT_THROW( Out_Of_Memory );
/* Ugly but it allows us to reduce the diff */
#define decoder (*decoder)
{
#else
T1_DecoderRec decoder;
#endif
T1_Face face = (T1_Face)t1glyph->face;
FT_Bool hinting;
FT_Bool scaled;
FT_Bool force_scaling = FALSE;
T1_Font type1 = &face->type1;
PSAux_Service psaux = (PSAux_Service)face->psaux;
const T1_Decoder_Funcs decoder_funcs = psaux->t1_decoder_funcs;
FT_Matrix font_matrix;
FT_Vector font_offset;
FT_Data glyph_data;
FT_Bool must_finish_decoder = FALSE;
#ifdef FT_CONFIG_OPTION_INCREMENTAL
FT_Bool glyph_data_loaded = 0;
#endif
#ifdef FT_CONFIG_OPTION_INCREMENTAL
if ( glyph_index >= (FT_UInt)face->root.num_glyphs &&
!face->root.internal->incremental_interface )
#else
if ( glyph_index >= (FT_UInt)face->root.num_glyphs )
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
{
error = FT_THROW( Invalid_Argument );
goto Exit;
}
FT_TRACE1(( "T1_Load_Glyph: glyph index %d\n", glyph_index ));
FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) );
if ( load_flags & FT_LOAD_NO_RECURSE )
load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;
if ( t1size )
{
glyph->x_scale = t1size->metrics.x_scale;
glyph->y_scale = t1size->metrics.y_scale;
}
else
{
glyph->x_scale = 0x10000L;
glyph->y_scale = 0x10000L;
}
t1glyph->outline.n_points = 0;
t1glyph->outline.n_contours = 0;
hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 &&
( load_flags & FT_LOAD_NO_HINTING ) == 0 );
scaled = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 );
glyph->hint = hinting;
glyph->scaled = scaled;
t1glyph->format = FT_GLYPH_FORMAT_OUTLINE;
error = decoder_funcs->init( &decoder,
t1glyph->face,
t1size,
t1glyph,
(FT_Byte**)type1->glyph_names,
face->blend,
FT_BOOL( hinting ),
FT_LOAD_TARGET_MODE( load_flags ),
T1_Parse_Glyph );
if ( error )
goto Exit;
must_finish_decoder = TRUE;
decoder.builder.no_recurse = FT_BOOL(
( load_flags & FT_LOAD_NO_RECURSE ) != 0 );
decoder.num_subrs = type1->num_subrs;
decoder.subrs = type1->subrs;
decoder.subrs_len = type1->subrs_len;
decoder.subrs_hash = type1->subrs_hash;
decoder.buildchar = face->buildchar;
decoder.len_buildchar = face->len_buildchar;
/* now load the unscaled outline */
error = T1_Parse_Glyph_And_Get_Char_String( &decoder, glyph_index,
&glyph_data,
&force_scaling );
if ( error )
goto Exit;
#ifdef FT_CONFIG_OPTION_INCREMENTAL
glyph_data_loaded = 1;
#endif
hinting = glyph->hint;
font_matrix = decoder.font_matrix;
font_offset = decoder.font_offset;
/* save new glyph tables */
decoder_funcs->done( &decoder );
must_finish_decoder = FALSE;
/* now, set the metrics -- this is rather simple, as */
/* the left side bearing is the xMin, and the top side */
/* bearing the yMax */
if ( !error )
{
t1glyph->outline.flags &= FT_OUTLINE_OWNER;
t1glyph->outline.flags |= FT_OUTLINE_REVERSE_FILL;
/* for composite glyphs, return only left side bearing and */
/* advance width */
if ( load_flags & FT_LOAD_NO_RECURSE )
{
FT_Slot_Internal internal = t1glyph->internal;
t1glyph->metrics.horiBearingX =
FIXED_TO_INT( decoder.builder.left_bearing.x );
t1glyph->metrics.horiAdvance =
FIXED_TO_INT( decoder.builder.advance.x );
internal->glyph_matrix = font_matrix;
internal->glyph_delta = font_offset;
internal->glyph_transformed = 1;
}
else
{
FT_BBox cbox;
FT_Glyph_Metrics* metrics = &t1glyph->metrics;
/* copy the _unscaled_ advance width */
metrics->horiAdvance =
FIXED_TO_INT( decoder.builder.advance.x );
t1glyph->linearHoriAdvance =
FIXED_TO_INT( decoder.builder.advance.x );
t1glyph->internal->glyph_transformed = 0;
if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
{
/* make up vertical ones */
metrics->vertAdvance = ( face->type1.font_bbox.yMax -
face->type1.font_bbox.yMin ) >> 16;
t1glyph->linearVertAdvance = metrics->vertAdvance;
}
else
{
metrics->vertAdvance =
FIXED_TO_INT( decoder.builder.advance.y );
t1glyph->linearVertAdvance =
FIXED_TO_INT( decoder.builder.advance.y );
}
t1glyph->format = FT_GLYPH_FORMAT_OUTLINE;
if ( t1size && t1size->metrics.y_ppem < 24 )
t1glyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION;
#if 1
/* apply the font matrix, if any */
if ( font_matrix.xx != 0x10000L || font_matrix.yy != 0x10000L ||
font_matrix.xy != 0 || font_matrix.yx != 0 )
{
FT_Outline_Transform( &t1glyph->outline, &font_matrix );
metrics->horiAdvance = FT_MulFix( metrics->horiAdvance,
font_matrix.xx );
metrics->vertAdvance = FT_MulFix( metrics->vertAdvance,
font_matrix.yy );
}
if ( font_offset.x || font_offset.y )
{
FT_Outline_Translate( &t1glyph->outline,
font_offset.x,
font_offset.y );
metrics->horiAdvance += font_offset.x;
metrics->vertAdvance += font_offset.y;
}
#endif
if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 || force_scaling )
{
/* scale the outline and the metrics */
FT_Int n;
FT_Outline* cur = decoder.builder.base;
FT_Vector* vec = cur->points;
FT_Fixed x_scale = glyph->x_scale;
FT_Fixed y_scale = glyph->y_scale;
/* First of all, scale the points, if we are not hinting */
if ( !hinting || ! decoder.builder.hints_funcs )
for ( n = cur->n_points; n > 0; n--, vec++ )
{
vec->x = FT_MulFix( vec->x, x_scale );
vec->y = FT_MulFix( vec->y, y_scale );
}
/* Then scale the metrics */
metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale );
}
/* compute the other metrics */
FT_Outline_Get_CBox( &t1glyph->outline, &cbox );
metrics->width = cbox.xMax - cbox.xMin;
metrics->height = cbox.yMax - cbox.yMin;
metrics->horiBearingX = cbox.xMin;
metrics->horiBearingY = cbox.yMax;
if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
{
/* make up vertical ones */
ft_synthesize_vertical_metrics( metrics,
metrics->vertAdvance );
}
}
/*
* Class: FreetypeFont
* Method: loadGlyph0
* Signature: (JI)V
*/
JNIEXPORT void JNICALL Java_sage_FreetypeFont_loadGlyph0
(JNIEnv *env, jobject jo, jlong fontPtr, jint glyphCode)
{
//FT_Face face = (FT_Face) facePtr;
FTDataStruct* fontData = (FTDataStruct*)(intptr_t) fontPtr;
FT_Activate_Size(fontData->sizePtr);
int error = FT_Load_Glyph(fontData->facePtr, glyphCode, FT_LOAD_FORCE_AUTOHINT);
if ((fontData->style & FT_STYLE_FLAG_BOLD) != 0)
{
// Apply bold effect
if (fontData->facePtr->glyph->format == FT_GLYPH_FORMAT_OUTLINE)
{
/* some reasonable strength */
FT_Pos strength = FT_MulFix(fontData->facePtr->units_per_EM,
fontData->facePtr->size->metrics.y_scale ) / 42;
FT_BBox bbox_before, bbox_after;
// The bounding box code was what XBMC was using to do this calculation; but the
// examples in the freetype library use the *4 math below which then doesn't clip
// the text when we render it.
// FT_Outline_Get_CBox(&fontData->facePtr->glyph->outline, &bbox_before);
FT_Outline_Embolden(&fontData->facePtr->glyph->outline, strength); // ignore error
// FT_Outline_Get_CBox(&fontData->facePtr->glyph->outline, &bbox_after);
// FT_Pos dx = bbox_after.xMax - bbox_before.xMax;
// FT_Pos dy = bbox_after.yMax - bbox_before.yMax;
FT_Pos dx = strength * 4;
FT_Pos dy = dx;
if (fontData->facePtr->glyph->advance.x)
fontData->facePtr->glyph->advance.x += dx;
if (fontData->facePtr->glyph->advance.y)
fontData->facePtr->glyph->advance.y += dy;
fontData->facePtr->glyph->metrics.width += dx;
fontData->facePtr->glyph->metrics.height += dy;
fontData->facePtr->glyph->metrics.horiBearingY += dy;
fontData->facePtr->glyph->metrics.horiAdvance += dx;
fontData->facePtr->glyph->metrics.vertBearingX -= dx / 2;
fontData->facePtr->glyph->metrics.vertBearingY += dy;
fontData->facePtr->glyph->metrics.vertAdvance += dy;
}
}
if ((fontData->style & FT_STYLE_FLAG_ITALIC) != 0)
{
// Apply italics effect
if (fontData->facePtr->glyph->format == FT_GLYPH_FORMAT_OUTLINE)
{
/* For italic, simply apply a shear transform, with an angle */
/* of about 12 degrees. */
FT_Matrix transform;
transform.xx = 0x10000L;
transform.yx = 0x00000L;
transform.xy = 0x06000L;
transform.yy = 0x10000L;
FT_BBox bbox_before, bbox_after;
FT_Outline_Get_CBox(&fontData->facePtr->glyph->outline, &bbox_before);
FT_Outline_Transform(&fontData->facePtr->glyph->outline, &transform);
FT_Outline_Get_CBox(&fontData->facePtr->glyph->outline, &bbox_after);
FT_Pos dx = bbox_after.xMax - bbox_before.xMax;
FT_Pos dy = bbox_after.yMax - bbox_before.yMax;
fontData->facePtr->glyph->metrics.width += dx;
fontData->facePtr->glyph->metrics.height += dy;
}
}
}
