ref: afdc4c4c2b996ec48ac9fee27cdaff685cc3c9ee
parent: 51d4e28daf151cfff40256004d6e0fa04ab37543
author: David Turner <[email protected]>
date: Thu Feb 10 11:08:36 EST 2000
Updates to the Type 1 driver Now with a simple AFM parser in order to read the kerning table..
--- a/src/type1/rules.mk
+++ b/src/type1/rules.mk
@@ -103,6 +103,7 @@
$(T1_DIR_)t1driver.c \
$(T1_DIR_)t1encode.c \
$(T1_DIR_)t1hinter.c \
+ $(T1_DIR_)t1afm.c \
$(T1_DIR_)t1gload.c
--- a/src/type1/t1config.h
+++ b/src/type1/t1config.h
@@ -40,6 +40,13 @@
/* Define T1_CONFIG_OPTION_DISABLE_HINTER if you want to generate */
/* a driver with no hinter. This can be useful to debug the parser */
/* */
-#undef T1_CONFIG_OPTION_DISABLE_HINTER
+#define T1_CONFIG_OPTION_DISABLE_HINTER
+
+/* Define this configuration macro if you want to prevent the */
+/* compilation of "t1afm", which is in charge of reading Type1 */
+/* AFM files into an existing face. Note that when set, the T1 */
+/* driver will be unable to produce kerning distances.. */
+/* */
+#define T1_CONFIG_OPTION_NO_AFM
#endif /* T1CONFIG_H */
--- a/src/type1/t1driver.c
+++ b/src/type1/t1driver.c
@@ -17,6 +17,7 @@
#include <t1driver.h>
#include <t1gload.h>
+#include <t1afm.h>
#include <ftdebug.h>
#include <ftstream.h>
@@ -25,6 +26,97 @@
#undef FT_COMPONENT
#define FT_COMPONENT trace_t1driver
+#ifndef T1_CONFIG_OPTION_NO_AFM
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Get_Interface */
+ /* */
+ /* <Description> */
+ /* Each driver can provide one or more extensions to the base */
+ /* FreeType API. These can be used to access format specific */
+ /* features (e.g., all TrueType/OpenType resources share a common */
+ /* file structure and common tables which can be accessed through the */
+ /* `sfnt' interface), or more simply generic ones (e.g., the */
+ /* `postscript names' interface which can be used to retrieve the */
+ /* PostScript name of a given glyph index). */
+ /* */
+ /* <InOut> */
+ /* driver :: A handle to a driver object. */
+ /* */
+ /* <Input> */
+ /* interface :: A string designing the interface. Examples are */
+ /* `sfnt', `post_names', `charmaps', etc. */
+ /* */
+ /* <Return> */
+ /* A typeless pointer to the extension's interface (normally a table */
+ /* of function pointers). Returns NULL if the requested extension */
+ /* isn't available (i.e., wasn't compiled in the driver at build */
+ /* time). */
+ /* */
+ static
+ void* Get_Interface)( FT_Driver driver,
+ const FT_String* interface )
+ {+ if ( strcmp( (const char*)interface, "attach_file" ) == 0 )
+ return T1_Read_AFM;
+
+ return 0;
+ }
+
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Get_Kerning */
+ /* */
+ /* <Description> */
+ /* A driver method used to return the kerning vector between two */
+ /* glyphs of the same face. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the source face object. */
+ /* */
+ /* left_glyph :: The index of the left glyph in the kern pair. */
+ /* */
+ /* right_glyph :: The index of the right glyph in the kern pair. */
+ /* */
+ /* <Output> */
+ /* kerning :: The kerning vector. This is in font units for */
+ /* scalable formats, and in pixels for fixed-sizes */
+ /* formats. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ /* <Note> */
+ /* Only horizontal layouts (left-to-right & right-to-left) are */
+ /* supported by this function. Other layouts, or more sophisticated */
+ /* kernings are out of scope of this method (the basic driver */
+ /* interface is meant to be simple). */
+ /* */
+ /* They can be implemented by format-specific interfaces. */
+ /* */
+ static
+ T1_Error Get_Kerning( T1_Face face,
+ T1_UInt left_glyph,
+ T1_UInt right_glyph,
+ T1_Vector* kerning )
+ {+ T1_AFM* afm;
+
+ kerning->x = 0;
+ kerning->y = 0;
+
+ afm = (T1_AFM*)face->afm_data;
+ if (afm)
+ T1_Get_Kerning( afm, left_glyph, right_glyph, kerning );
+
+ return T1_Err_Ok;
+ }
+#endif
+
/******************************************************************/
/* */
/* <Function> Set_Char_Sizes */
@@ -394,11 +486,21 @@
(FTDriver_initDriver) T1_Init_Driver,
(FTDriver_doneDriver) T1_Done_Driver,
+
+#ifdef T1_CONFIG_OPTION_NO_AFM
(FTDriver_getInterface) 0,
+#else
+ (FTDriver_getInterface) Get_Interface,
+#endif
(FTDriver_initFace) Init_Face,
(FTDriver_doneFace) T1_Done_Face,
+
+#ifdef T1_CONFIG_OPTION_NO_AFM
(FTDriver_getKerning) 0,
+#else
+ (FTDriver_getKerning) Get_Kerning,
+#endif
(FTDriver_initSize) T1_Init_Size,
(FTDriver_doneSize) T1_Done_Size,
--- a/src/type1/type1.c
+++ b/src/type1/type1.c
@@ -42,9 +42,14 @@
#include <t1objs.c>
#include <t1load.c> /* table loader */
#include <t1gload.c>
-
#include <t1tokens.c>
#include <t1parse.c>
#include <t1encode.c>
+
+#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
#include <t1hinter.c>
+#endif
+#ifndef T1_CONFIG_OPTION_NO_AFM
+#include <t1afm.c>
+#endif