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* src/base/ftobjs.c (ft_glyphslot_grid_fit_metrics, FT_Load_Glyph):

Browse Source 
Re-enable glyph metrics grid-fitting.  It is now done in the base
layer.
(FT_Set_Char_Size, FT_Set_Pixel_Sizes): Make sure the width and height
are not too small or too large, just like we were doing in 2.1.10.

* src/autofit/afloader.c (af_loader_load_g): The vertical metrics are
not scaled.
This commit is contained in:
Wu, Chia-I (吳佳一) 2006-02-27 09:18:07 +00:00
parent f99d846c8a
commit 2e48a1a138
3 changed files with 111 additions and 8 deletions
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11
ChangeLog
View File

@ -1,3 +1,14 @@
2006-02-27 Chia-I Wu <b90201047@ntu.edu.tw>
* src/base/ftobjs.c (ft_glyphslot_grid_fit_metrics, FT_Load_Glyph):
Re-enable glyph metrics grid-fitting. It is now done in the base
layer.
(FT_Set_Char_Size, FT_Set_Pixel_Sizes): Make sure the width and height
are not too small or too large, just like we were doing in 2.1.10.
* src/autofit/afloader.c (af_loader_load_g): The vertical metrics are
not scaled.
2006-02-26 Werner Lemberg <wl@gnu.org>
* docs/release: Minor additions and clarifications.

18
src/autofit/afloader.c
View File

@ -378,12 +378,21 @@
Hint_Metrics:
if ( depth == 0 )
{
FT_BBox bbox;
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 );
}
/* we must translate our final outline by -pp1.x and compute */
/* the new metrics */
@ -402,6 +411,9 @@
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 */
#if 0
@ -418,7 +430,11 @@
metrics->scaler.x_scale );
#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 );

90
src/base/ftobjs.c
View File

@ -36,6 +36,7 @@
#include FT_SERVICE_KERNING_H
#include FT_SERVICE_TRUETYPE_ENGINE_H
#define GRID_FIT_METRICS
FT_BASE_DEF( FT_Pointer )
ft_service_list_lookup( FT_ServiceDesc service_descriptors,
@ -478,6 +479,50 @@
ft_lookup_glyph_renderer( FT_GlyphSlot slot );
#ifdef GRID_FIT_METRICS
static void
ft_glyphslot_grid_fit_metrics( FT_GlyphSlot slot,
FT_Bool vertical )
{
FT_Glyph_Metrics* metrics = &slot->metrics;
FT_Pos right, bottom;
if ( vertical )
{
metrics->horiBearingX = FT_PIX_FLOOR( metrics->horiBearingX );
metrics->horiBearingY = FT_PIX_CEIL ( metrics->horiBearingY );
right = FT_PIX_CEIL( metrics->vertBearingX + metrics->width );
bottom = FT_PIX_CEIL( metrics->vertBearingY + metrics->height );
metrics->vertBearingX = FT_PIX_FLOOR( metrics->vertBearingX );
metrics->vertBearingY = FT_PIX_FLOOR( metrics->vertBearingY );
metrics->width = right - metrics->vertBearingX;
metrics->height = bottom - metrics->vertBearingY;
}
else
{
metrics->vertBearingX = FT_PIX_FLOOR( metrics->vertBearingX );
metrics->vertBearingY = FT_PIX_FLOOR( metrics->vertBearingY );
right = FT_PIX_CEIL ( metrics->horiBearingX + metrics->width );
bottom = FT_PIX_FLOOR( metrics->horiBearingY - metrics->height );
metrics->horiBearingX = FT_PIX_FLOOR( metrics->horiBearingX );
metrics->horiBearingY = FT_PIX_CEIL ( metrics->horiBearingY );
metrics->width = right - metrics->horiBearingX;
metrics->height = metrics->horiBearingY - bottom;
}
metrics->horiAdvance = FT_PIX_ROUND( metrics->horiAdvance );
metrics->vertAdvance = FT_PIX_ROUND( metrics->vertAdvance );
}
#endif /* GRID_FIT_METRICS */
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
@ -575,10 +620,20 @@
if ( error )
goto Exit;
/* check that the loaded outline is correct */
error = FT_Outline_Check( &slot->outline );
if ( error )
goto Exit;
if ( slot->format == FT_GLYPH_FORMAT_OUTLINE )
{
/* check that the loaded outline is correct */
error = FT_Outline_Check( &slot->outline );
if ( error )
goto Exit;
#ifdef GRID_FIT_METRICS
if ( !( load_flags & FT_LOAD_NO_HINTING ) )
ft_glyphslot_grid_fit_metrics( slot,
load_flags
& FT_LOAD_VERTICAL_LAYOUT );
#endif
}
}
Load_Ok:
@ -2063,7 +2118,7 @@
{
/* Compute root ascender, descender, test height, and max_advance */
#if 1
#ifdef GRID_FIT_METRICS
metrics->ascender = FT_PIX_CEIL( FT_MulFix( face->ascender,
metrics->y_scale ) );
@ -2075,7 +2130,7 @@
metrics->max_advance = FT_PIX_ROUND( FT_MulFix( face->max_advance_width,
metrics->x_scale ) );
#else
#else /* !GRID_FIT_METRICS */
metrics->ascender = FT_MulFix( face->ascender,
metrics->y_scale );
@ -2087,7 +2142,7 @@
metrics->max_advance = FT_MulFix( face->max_advance_width,
metrics->x_scale );
#endif
#endif /* !GRID_FIT_METRICS */
}
@ -2327,6 +2382,11 @@
FT_Size_RequestRec req;
if ( char_width < 1 * 64 )
char_width = 1 * 64;
if ( char_height < 1 * 64 )
char_height = 1 * 64;
req.type = FT_SIZE_REQUEST_TYPE_NOMINAL;
req.width = char_width;
req.height = char_height;
@ -2347,6 +2407,22 @@
FT_Size_RequestRec req;
if ( pixel_width == 0 )
pixel_width = pixel_height;
else if ( pixel_height == 0 )
pixel_height = pixel_width;
if ( pixel_width < 1 )
pixel_width = 1;
if ( pixel_height < 1 )
pixel_height = 1;
/* use `>=' to avoid potention compiler warning on 16bit platforms */
if ( pixel_width >= 0xFFFFU )
pixel_width = 0xFFFFU;
if ( pixel_height >= 0xFFFFU )
pixel_height = 0xFFFFU;
req.type = FT_SIZE_REQUEST_TYPE_NOMINAL;
req.width = pixel_width << 6;
req.height = pixel_height << 6;