--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libfreetype/src/pfr/pfrobjs.c Mon Apr 25 01:46:54 2011 +0200
@@ -0,0 +1,591 @@
+/***************************************************************************/
+/* */
+/* pfrobjs.c */
+/* */
+/* FreeType PFR object methods (body). */
+/* */
+/* Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2010 by */
+/* David Turner, Robert Wilhelm, and Werner Lemberg. */
+/* */
+/* This file is part of the FreeType project, and may only be used, */
+/* modified, and distributed under the terms of the FreeType project */
+/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
+/* this file you indicate that you have read the license and */
+/* understand and accept it fully. */
+/* */
+/***************************************************************************/
+
+
+#include "pfrobjs.h"
+#include "pfrload.h"
+#include "pfrgload.h"
+#include "pfrcmap.h"
+#include "pfrsbit.h"
+#include FT_OUTLINE_H
+#include FT_INTERNAL_DEBUG_H
+#include FT_TRUETYPE_IDS_H
+
+#include "pfrerror.h"
+
+#undef FT_COMPONENT
+#define FT_COMPONENT trace_pfr
+
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** FACE OBJECT METHODS *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+ FT_LOCAL_DEF( void )
+ pfr_face_done( FT_Face pfrface ) /* PFR_Face */
+ {
+ PFR_Face face = (PFR_Face)pfrface;
+ FT_Memory memory;
+
+
+ if ( !face )
+ return;
+
+ memory = pfrface->driver->root.memory;
+
+ /* we don't want dangling pointers */
+ pfrface->family_name = NULL;
+ pfrface->style_name = NULL;
+
+ /* finalize the physical font record */
+ pfr_phy_font_done( &face->phy_font, FT_FACE_MEMORY( face ) );
+
+ /* no need to finalize the logical font or the header */
+ FT_FREE( pfrface->available_sizes );
+ }
+
+
+ FT_LOCAL_DEF( FT_Error )
+ pfr_face_init( FT_Stream stream,
+ FT_Face pfrface,
+ FT_Int face_index,
+ FT_Int num_params,
+ FT_Parameter* params )
+ {
+ PFR_Face face = (PFR_Face)pfrface;
+ FT_Error error;
+
+ FT_UNUSED( num_params );
+ FT_UNUSED( params );
+
+
+ /* load the header and check it */
+ error = pfr_header_load( &face->header, stream );
+ if ( error )
+ goto Exit;
+
+ if ( !pfr_header_check( &face->header ) )
+ {
+ FT_TRACE4(( "pfr_face_init: not a valid PFR font\n" ));
+ error = PFR_Err_Unknown_File_Format;
+ goto Exit;
+ }
+
+ /* check face index */
+ {
+ FT_UInt num_faces;
+
+
+ error = pfr_log_font_count( stream,
+ face->header.log_dir_offset,
+ &num_faces );
+ if ( error )
+ goto Exit;
+
+ pfrface->num_faces = num_faces;
+ }
+
+ if ( face_index < 0 )
+ goto Exit;
+
+ if ( face_index >= pfrface->num_faces )
+ {
+ FT_ERROR(( "pfr_face_init: invalid face index\n" ));
+ error = PFR_Err_Invalid_Argument;
+ goto Exit;
+ }
+
+ /* load the face */
+ error = pfr_log_font_load(
+ &face->log_font, stream, face_index,
+ face->header.log_dir_offset,
+ FT_BOOL( face->header.phy_font_max_size_high != 0 ) );
+ if ( error )
+ goto Exit;
+
+ /* now load the physical font descriptor */
+ error = pfr_phy_font_load( &face->phy_font, stream,
+ face->log_font.phys_offset,
+ face->log_font.phys_size );
+ if ( error )
+ goto Exit;
+
+ /* now set up all root face fields */
+ {
+ PFR_PhyFont phy_font = &face->phy_font;
+
+
+ pfrface->face_index = face_index;
+ pfrface->num_glyphs = phy_font->num_chars + 1;
+ pfrface->face_flags = FT_FACE_FLAG_SCALABLE;
+
+ /* if all characters point to the same gps_offset 0, we */
+ /* assume that the font only contains bitmaps */
+ {
+ FT_UInt nn;
+
+
+ for ( nn = 0; nn < phy_font->num_chars; nn++ )
+ if ( phy_font->chars[nn].gps_offset != 0 )
+ break;
+
+ if ( nn == phy_font->num_chars )
+ {
+ if ( phy_font->num_strikes > 0 )
+ pfrface->face_flags = 0; /* not scalable */
+ else
+ {
+ FT_ERROR(( "pfr_face_init: font doesn't contain glyphs\n" ));
+ error = PFR_Err_Invalid_File_Format;
+ goto Exit;
+ }
+ }
+ }
+
+ if ( (phy_font->flags & PFR_PHY_PROPORTIONAL) == 0 )
+ pfrface->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
+
+ if ( phy_font->flags & PFR_PHY_VERTICAL )
+ pfrface->face_flags |= FT_FACE_FLAG_VERTICAL;
+ else
+ pfrface->face_flags |= FT_FACE_FLAG_HORIZONTAL;
+
+ if ( phy_font->num_strikes > 0 )
+ pfrface->face_flags |= FT_FACE_FLAG_FIXED_SIZES;
+
+ if ( phy_font->num_kern_pairs > 0 )
+ pfrface->face_flags |= FT_FACE_FLAG_KERNING;
+
+ /* If no family name was found in the "undocumented" auxiliary
+ * data, use the font ID instead. This sucks but is better than
+ * nothing.
+ */
+ pfrface->family_name = phy_font->family_name;
+ if ( pfrface->family_name == NULL )
+ pfrface->family_name = phy_font->font_id;
+
+ /* note that the style name can be NULL in certain PFR fonts,
+ * probably meaning "Regular"
+ */
+ pfrface->style_name = phy_font->style_name;
+
+ pfrface->num_fixed_sizes = 0;
+ pfrface->available_sizes = 0;
+
+ pfrface->bbox = phy_font->bbox;
+ pfrface->units_per_EM = (FT_UShort)phy_font->outline_resolution;
+ pfrface->ascender = (FT_Short) phy_font->bbox.yMax;
+ pfrface->descender = (FT_Short) phy_font->bbox.yMin;
+
+ pfrface->height = (FT_Short)( ( pfrface->units_per_EM * 12 ) / 10 );
+ if ( pfrface->height < pfrface->ascender - pfrface->descender )
+ pfrface->height = (FT_Short)(pfrface->ascender - pfrface->descender);
+
+ if ( phy_font->num_strikes > 0 )
+ {
+ FT_UInt n, count = phy_font->num_strikes;
+ FT_Bitmap_Size* size;
+ PFR_Strike strike;
+ FT_Memory memory = pfrface->stream->memory;
+
+
+ if ( FT_NEW_ARRAY( pfrface->available_sizes, count ) )
+ goto Exit;
+
+ size = pfrface->available_sizes;
+ strike = phy_font->strikes;
+ for ( n = 0; n < count; n++, size++, strike++ )
+ {
+ size->height = (FT_UShort)strike->y_ppm;
+ size->width = (FT_UShort)strike->x_ppm;
+ size->size = strike->y_ppm << 6;
+ size->x_ppem = strike->x_ppm << 6;
+ size->y_ppem = strike->y_ppm << 6;
+ }
+ pfrface->num_fixed_sizes = count;
+ }
+
+ /* now compute maximum advance width */
+ if ( ( phy_font->flags & PFR_PHY_PROPORTIONAL ) == 0 )
+ pfrface->max_advance_width = (FT_Short)phy_font->standard_advance;
+ else
+ {
+ FT_Int max = 0;
+ FT_UInt count = phy_font->num_chars;
+ PFR_Char gchar = phy_font->chars;
+
+
+ for ( ; count > 0; count--, gchar++ )
+ {
+ if ( max < gchar->advance )
+ max = gchar->advance;
+ }
+
+ pfrface->max_advance_width = (FT_Short)max;
+ }
+
+ pfrface->max_advance_height = pfrface->height;
+
+ pfrface->underline_position = (FT_Short)( -pfrface->units_per_EM / 10 );
+ pfrface->underline_thickness = (FT_Short)( pfrface->units_per_EM / 30 );
+
+ /* create charmap */
+ {
+ FT_CharMapRec charmap;
+
+
+ charmap.face = pfrface;
+ charmap.platform_id = TT_PLATFORM_MICROSOFT;
+ charmap.encoding_id = TT_MS_ID_UNICODE_CS;
+ charmap.encoding = FT_ENCODING_UNICODE;
+
+ error = FT_CMap_New( &pfr_cmap_class_rec, NULL, &charmap, NULL );
+
+#if 0
+ /* Select default charmap */
+ if ( pfrface->num_charmaps )
+ pfrface->charmap = pfrface->charmaps[0];
+#endif
+ }
+
+ /* check whether we've loaded any kerning pairs */
+ if ( phy_font->num_kern_pairs )
+ pfrface->face_flags |= FT_FACE_FLAG_KERNING;
+ }
+
+ Exit:
+ return error;
+ }
+
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** SLOT OBJECT METHOD *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+ FT_LOCAL_DEF( FT_Error )
+ pfr_slot_init( FT_GlyphSlot pfrslot ) /* PFR_Slot */
+ {
+ PFR_Slot slot = (PFR_Slot)pfrslot;
+ FT_GlyphLoader loader = pfrslot->internal->loader;
+
+
+ pfr_glyph_init( &slot->glyph, loader );
+
+ return 0;
+ }
+
+
+ FT_LOCAL_DEF( void )
+ pfr_slot_done( FT_GlyphSlot pfrslot ) /* PFR_Slot */
+ {
+ PFR_Slot slot = (PFR_Slot)pfrslot;
+
+
+ pfr_glyph_done( &slot->glyph );
+ }
+
+
+ FT_LOCAL_DEF( FT_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--;
+
+ if ( !face || gindex >= face->phy_font.num_chars )
+ {
+ error = PFR_Err_Invalid_Argument;
+ goto Exit;
+ }
+
+ /* 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;
+
+#if 0 /* some fonts seem to be broken here! */
+
+ /* 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 );
+ }
+#endif
+
+ /* 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;
+ }
+
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** KERNING METHOD *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+ FT_LOCAL_DEF( FT_Error )
+ pfr_face_get_kerning( FT_Face pfrface, /* PFR_Face */
+ FT_UInt glyph1,
+ FT_UInt glyph2,
+ FT_Vector* kerning )
+ {
+ PFR_Face face = (PFR_Face)pfrface;
+ FT_Error error = PFR_Err_Ok;
+ PFR_PhyFont phy_font = &face->phy_font;
+ FT_UInt32 code1, code2, pair;
+
+
+ kerning->x = 0;
+ kerning->y = 0;
+
+ if ( glyph1 > 0 )
+ glyph1--;
+
+ if ( glyph2 > 0 )
+ glyph2--;
+
+ /* convert glyph indices to character codes */
+ if ( glyph1 > phy_font->num_chars ||
+ glyph2 > phy_font->num_chars )
+ goto Exit;
+
+ code1 = phy_font->chars[glyph1].char_code;
+ code2 = phy_font->chars[glyph2].char_code;
+ pair = PFR_KERN_INDEX( code1, code2 );
+
+ /* now search the list of kerning items */
+ {
+ PFR_KernItem item = phy_font->kern_items;
+ FT_Stream stream = pfrface->stream;
+
+
+ for ( ; item; item = item->next )
+ {
+ if ( pair >= item->pair1 && pair <= item->pair2 )
+ goto FoundPair;
+ }
+ goto Exit;
+
+ FoundPair: /* we found an item, now parse it and find the value if any */
+ if ( FT_STREAM_SEEK( item->offset ) ||
+ FT_FRAME_ENTER( item->pair_count * item->pair_size ) )
+ goto Exit;
+
+ {
+ FT_UInt count = item->pair_count;
+ FT_UInt size = item->pair_size;
+ FT_UInt power = (FT_UInt)ft_highpow2( (FT_UInt32)count );
+ FT_UInt probe = power * size;
+ FT_UInt extra = count - power;
+ FT_Byte* base = stream->cursor;
+ FT_Bool twobytes = FT_BOOL( item->flags & 1 );
+ FT_Bool twobyte_adj = FT_BOOL( item->flags & 2 );
+ FT_Byte* p;
+ FT_UInt32 cpair;
+
+
+ if ( extra > 0 )
+ {
+ p = base + extra * size;
+
+ if ( twobytes )
+ cpair = FT_NEXT_ULONG( p );
+ else
+ cpair = PFR_NEXT_KPAIR( p );
+
+ if ( cpair == pair )
+ goto Found;
+
+ if ( cpair < pair )
+ {
+ if ( twobyte_adj )
+ p += 2;
+ else
+ p++;
+ base = p;
+ }
+ }
+
+ while ( probe > size )
+ {
+ probe >>= 1;
+ p = base + probe;
+
+ if ( twobytes )
+ cpair = FT_NEXT_ULONG( p );
+ else
+ cpair = PFR_NEXT_KPAIR( p );
+
+ if ( cpair == pair )
+ goto Found;
+
+ if ( cpair < pair )
+ base += probe;
+ }
+
+ p = base;
+
+ if ( twobytes )
+ cpair = FT_NEXT_ULONG( p );
+ else
+ cpair = PFR_NEXT_KPAIR( p );
+
+ if ( cpair == pair )
+ {
+ FT_Int value;
+
+
+ Found:
+ if ( twobyte_adj )
+ value = FT_PEEK_SHORT( p );
+ else
+ value = p[0];
+
+ kerning->x = item->base_adj + value;
+ }
+ }
+
+ FT_FRAME_EXIT();
+ }
+
+ Exit:
+ return error;
+ }
+
+/* END */