--- a/misc/libfreetype/src/autofit/afloader.c Thu Jul 25 23:16:06 2013 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,547 +0,0 @@
-/***************************************************************************/
-/* */
-/* afloader.c */
-/* */
-/* Auto-fitter glyph loading routines (body). */
-/* */
-/* Copyright 2003-2009, 2011 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 "afloader.h"
-#include "afhints.h"
-#include "afglobal.h"
-#include "aferrors.h"
-
-
- /* Initialize glyph loader. */
-
- FT_LOCAL_DEF( FT_Error )
- af_loader_init( AF_Loader loader,
- FT_Memory memory )
- {
- FT_ZERO( loader );
-
- af_glyph_hints_init( &loader->hints, memory );
-#ifdef FT_DEBUG_AUTOFIT
- _af_debug_hints = &loader->hints;
-#endif
- return FT_GlyphLoader_New( memory, &loader->gloader );
- }
-
-
- /* Reset glyph loader and compute globals if necessary. */
-
- FT_LOCAL_DEF( FT_Error )
- af_loader_reset( AF_Loader loader,
- FT_Face face )
- {
- FT_Error error = AF_Err_Ok;
-
-
- loader->face = face;
- loader->globals = (AF_FaceGlobals)face->autohint.data;
-
- FT_GlyphLoader_Rewind( loader->gloader );
-
- if ( loader->globals == NULL )
- {
- error = af_face_globals_new( face, &loader->globals );
- if ( !error )
- {
- face->autohint.data =
- (FT_Pointer)loader->globals;
- face->autohint.finalizer =
- (FT_Generic_Finalizer)af_face_globals_free;
- }
- }
-
- return error;
- }
-
-
- /* Finalize glyph loader. */
-
- FT_LOCAL_DEF( void )
- af_loader_done( AF_Loader loader )
- {
- af_glyph_hints_done( &loader->hints );
-
- loader->face = NULL;
- loader->globals = NULL;
-
-#ifdef FT_DEBUG_AUTOFIT
- _af_debug_hints = NULL;
-#endif
- FT_GlyphLoader_Done( loader->gloader );
- loader->gloader = NULL;
- }
-
-
- /* Load a single glyph component. This routine calls itself */
- /* recursively, if necessary, and does the main work of */
- /* `af_loader_load_glyph.' */
-
- 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;
-
-
- error = FT_Load_Glyph( face, glyph_index, load_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 );
- }
-
- /* set linear metrics */
- slot->linearHoriAdvance = slot->metrics.horiAdvance;
- slot->linearVertAdvance = slot->metrics.vertAdvance;
-
- 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 is 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 may consider another approach in the near future */
- 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 ( 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;
-
- slot->outline = internal->loader->base.outline;
- slot->format = FT_GLYPH_FORMAT_OUTLINE;
- }
-
- Exit:
- return error;
- }
-
-
- /* Load a glyph. */
-
- FT_LOCAL_DEF( FT_Error )
- af_loader_load_glyph( AF_Loader loader,
- FT_Face face,
- FT_UInt gindex,
- FT_UInt32 load_flags )
- {
- FT_Error error;
- FT_Size size = face->size;
- AF_ScalerRec scaler;
-
-
- if ( !size )
- return AF_Err_Invalid_Argument;
-
- FT_ZERO( &scaler );
-
- scaler.face = face;
- scaler.x_scale = size->metrics.x_scale;
- scaler.x_delta = 0; /* XXX: TODO: add support for sub-pixel hinting */
- scaler.y_scale = size->metrics.y_scale;
- scaler.y_delta = 0; /* XXX: TODO: add support for sub-pixel hinting */
-
- scaler.render_mode = FT_LOAD_TARGET_MODE( load_flags );
- scaler.flags = 0; /* XXX: fix this */
-
- error = af_loader_reset( loader, face );
- if ( !error )
- {
- AF_ScriptMetrics metrics;
- FT_UInt options = 0;
-
-
-#ifdef FT_OPTION_AUTOFIT2
- /* XXX: undocumented hook to activate the latin2 hinter */
- if ( load_flags & ( 1UL << 20 ) )
- options = 2;
-#endif
-
- error = af_face_globals_get_metrics( loader->globals, gindex,
- options, &metrics );
- if ( !error )
- {
- loader->metrics = metrics;
-
- if ( metrics->clazz->script_metrics_scale )
- metrics->clazz->script_metrics_scale( metrics, &scaler );
- else
- metrics->scaler = scaler;
-
- load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_IGNORE_TRANSFORM;
- load_flags &= ~FT_LOAD_RENDER;
-
- if ( metrics->clazz->script_hints_init )
- {
- error = metrics->clazz->script_hints_init( &loader->hints,
- metrics );
- if ( error )
- goto Exit;
- }
-
- error = af_loader_load_g( loader, &scaler, gindex, load_flags, 0 );
- }
- }
- Exit:
- return error;
- }
-
-
-/* END */