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* docs/CHANGES: Mention the size selection change. 

* src/bdf/bdfdrivr.c (BDF_Size_Request, BDF_Size_Select),
src/pcf/pcfdrivr.c (PCF_Size_Request, PCF_Size_Select),
src/winfonts/winfnt.c (FNT_Size_Request, FNT_Size_Select): Do size
matching for request of type NOMINAL and REAL_DIM.

* src/winfonts/winfnt.c (FNT_Face_Init): Print trace message when
`pixel_height' is used for nominal height.

* src/base/ftobjs.c (FT_Request_Size): Call `FT_Match_Size' if the
face is bitmap only and driver doesn't provide `request_size'.  This
is added merely for completion as no driver satisfies the conditions.
This commit is contained in:
Wu, Chia-I (吳佳一) 2006-01-14 05:09:30 +00:00
parent f1c2b91e14
commit e33dc2ebee
6 changed files with 142 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
ChangeLog
View File

@ -1,3 +1,19 @@
2006-01-14 Chia-I Wu <b90201047@ntu.edu.tw>
* docs/CHANGES: Mention the size selection change.
* src/bdf/bdfdrivr.c (BDF_Size_Request, BDF_Size_Select),
src/pcf/pcfdrivr.c (PCF_Size_Request, PCF_Size_Select),
src/winfonts/winfnt.c (FNT_Size_Request, FNT_Size_Select): Do size
matching for request of type NOMINAL and REAL_DIM.
* src/winfonts/winfnt.c (FNT_Face_Init): Print trace message when
`pixel_height' is used for nominal height.
* src/base/ftobjs.c (FT_Request_Size): Call `FT_Match_Size' if the
face is bitmap only and driver doesn't provide `request_size'. This
is added merely for completion as no driver satisfies the conditions.
2006-01-13 Chia-I Wu <b90201047@ntu.edu.tw>
Introduce new size selection interface.

10
docs/CHANGES
View File

@ -52,6 +52,16 @@ LATEST CHANGES BETWEEN 2.2.0 and 2.1.10
`FT_GetFile_From_Mac_Name'. Legacy APIs are still available, if
FreeType is built without disabling them.
- A new API `FT_Select_Size' is added to select a bitmap strike by
its index. Code using other functions to select bitmap strikes
should be updated to use this function.
- In 2.1.10, the behavior of `FT_Set_Pixel_Sizes' is changed for
BDF/PCF fonts, and only for them. This causes inconsistency.
In this release, we undo the change. The intent of the change
in 2.1.10 is to allow size selection through real dimensions,
which can now be done through `FT_Request_Size'.
III. MISCELLANEOUS

30
src/base/ftobjs.c
View File

@ -2093,6 +2093,7 @@
FT_Driver_Class clazz;
FT_Size_Metrics* metrics;
FT_Error error;
FT_Bool bitmap_only = 0;
if ( !face )
@ -2190,13 +2191,36 @@
else
{
FT_ZERO( metrics );
if ( FT_HAS_FIXED_SIZES( face ) )
bitmap_only = 1;
error = FT_Err_Invalid_Pixel_Size;
}
if ( clazz->request_size )
return clazz->request_size( face->size, req );
else
return error;
error = clazz->request_size( face->size, req );
/*
* The reason that a driver not having `request_size' defined is
* either the scaling here suffices or the supported formats
* are bitmap-only and size matching is not implmented.
*
* In the latter case, a simple size matching is done.
*/
else if ( bitmap_only )
{
FT_ULong index;
if ( !FT_Match_Size( face, req, 0, &index ) )
{
FT_TRACE3(( "FT_Request_Size: bitmap strike %lu matched\n", index ));
error = FT_Select_Size( face, index );
}
}
return error;
}

36
src/bdf/bdfdrivr.c
View File

@ -592,6 +592,8 @@ THE SOFTWARE.
size->metrics.ascender = bdffont->font_ascent << 6;
size->metrics.descender = -bdffont->font_descent << 6;
size->metrics.height = ( bdffont->font_ascent +
bdffont->font_descent ) << 6;
size->metrics.max_advance = bdffont->bbx.width << 6;
return BDF_Err_Ok;
@ -602,20 +604,40 @@ THE SOFTWARE.
BDF_Size_Request( FT_Size size,
FT_Size_Request req )
{
FT_Face face = size->face;
FT_Error error;
FT_Face face = size->face;
FT_Bitmap_Size* bsize = face->available_sizes;
bdf_font_t* bdffont = ( (BDF_Face)face )->bdffont;
FT_Error error = BDF_Err_Invalid_Pixel_Size;
FT_Long height;
error = FT_Match_Size( face, req, 1, NULL );
if ( req->vertResolution )
height = ( req->height * req->vertResolution + 36 ) / 72;
else
height = req->height;
height = ( height + 32 ) >> 6;
switch ( req->type )
{
case FT_SIZE_REQUEST_TYPE_NOMINAL:
if ( height == ( bsize->y_ppem + 32 ) >> 6 )
error = BDF_Err_Ok;
break;
case FT_SIZE_REQUEST_TYPE_REAL_DIM:
if ( height == ( bdffont->font_ascent +
bdffont->font_descent ) )
error = BDF_Err_Ok;
break;
default:
error = BDF_Err_Unimplemented_Feature;
break;
}
if ( error )
return error;
else
{
size->metrics.height = face->available_sizes->height << 6;
return BDF_Size_Select( size, 0 );
}
}

36
src/pcf/pcfdrivr.c
View File

@ -375,6 +375,9 @@ THE SOFTWARE.
size->metrics.descender = -face->accel.fontDescent << 6;
#if 0
size->metrics.height = face->accel.maxbounds.ascent << 6;
#else
size->metrics.height = size->metrics.ascender -
size->metrics.descender;
#endif
size->metrics.max_advance = face->accel.maxbounds.characterWidth << 6;
@ -386,20 +389,39 @@ THE SOFTWARE.
PCF_Size_Request( FT_Size size,
FT_Size_Request req )
{
FT_Face face = size->face;
FT_Error error;
PCF_Face face = (PCF_Face)size->face;
FT_Bitmap_Size* bsize = size->face->available_sizes;
FT_Error error = PCF_Err_Invalid_Pixel_Size;
FT_Long height;
error = FT_Match_Size( face, req, 1, NULL );
if ( req->vertResolution )
height = ( req->height * req->vertResolution + 36 ) / 72;
else
height = req->height;
height = ( height + 32 ) >> 6;
switch ( req->type )
{
case FT_SIZE_REQUEST_TYPE_NOMINAL:
if ( height == ( bsize->y_ppem + 32 ) >> 6 )
error = PCF_Err_Ok;
break;
case FT_SIZE_REQUEST_TYPE_REAL_DIM:
if ( height == ( face->accel.fontAscent +
face->accel.fontDescent ) )
error = PCF_Err_Ok;
break;
default:
error = PCF_Err_Unimplemented_Feature;
break;
}
if ( error )
return error;
else
{
size->metrics.height = face->available_sizes->height << 6;
return PCF_Size_Select( size, 0 );
}
}

39
src/winfonts/winfnt.c
View File

@ -489,6 +489,8 @@
*/
if ( bsize->y_ppem > font->header.pixel_height << 6 )
{
FT_TRACE2(( "use pixel_height as the nominal height\n" ));
bsize->y_ppem = font->header.pixel_height << 6;
bsize->size = FT_MulDiv( bsize->y_ppem, 72, y_res );
}
@ -579,6 +581,8 @@
size->metrics.ascender = header->ascent * 64;
size->metrics.descender = -( header->pixel_height -
header->ascent ) * 64;
size->metrics.height = ( header->pixel_height +
header->external_leading ) * 64;
size->metrics.max_advance = header->max_width * 64;
return FNT_Err_Ok;
@ -589,20 +593,39 @@
FNT_Size_Request( FT_Size size,
FT_Size_Request req )
{
FT_Face face = size->face;
FT_Error error;
FNT_Face face = (FNT_Face)size->face;
FT_WinFNT_Header header = &face->font->header;
FT_Bitmap_Size* bsize = size->face->available_sizes;
FT_Error error = FNT_Err_Invalid_Pixel_Size;
FT_Long height;
error = FT_Match_Size( face, req, 1, NULL );
if ( req->vertResolution )
height = ( req->height * req->vertResolution + 36 ) / 72;
else
height = req->height;
height = ( height + 32 ) >> 6;
switch ( req->type )
{
case FT_SIZE_REQUEST_TYPE_NOMINAL:
if ( height == ( bsize->y_ppem + 32 ) >> 6 )
error = FNT_Err_Ok;
break;
case FT_SIZE_REQUEST_TYPE_REAL_DIM:
if ( height == header->pixel_height )
error = FNT_Err_Ok;
break;
default:
error = FNT_Err_Unimplemented_Feature;
break;
}
if ( error )
return error;
else
{
size->metrics.height = face->available_sizes->height << 6;
return FNT_Size_Select( size );
}
}