fixed some bugs in the caching sub-system and improved
its API to enable many kinds of glyph images.. (note that the "ftview" program has been changed to use the caching sub-system, "ftmulti" and "ftstring" should come soon).
This commit is contained in:
David Turner
parent
e12e313a04
commit
80b96f350c
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@ -318,12 +318,26 @@
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/* <Note> */
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/* Other types may be defined in the future. */
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/* */
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#define FTC_IMAGE_FORMAT(x) ((x) & 7)
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typedef enum FTC_Image_Type_
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{
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ftc_image_mono = 0, /* monochrome bitmap */
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ftc_image_grays, /* anti-aliased bitmap */
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ftc_image_outline, /* scaled outline */
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ftc_image_master_outline /* original outline */
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ftc_image_format_bitmap = 0,
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ftc_image_format_outline = 1,
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ftc_image_flag_monochrome = 16,
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ftc_image_flag_unhinted = 32,
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ftc_image_flag_autohinted = 64,
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ftc_image_flag_unscaled = 128,
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ftc_image_flag_no_sbits = 256,
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ftc_image_mono = ftc_image_format_bitmap |
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ftc_image_flag_monochrome, /* monochrome bitmap */
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ftc_image_grays = ftc_image_format_bitmap, /* anti-aliased bitmap */
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ftc_image_outline = ftc_image_format_outline /* scaled outline */
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} FTC_Image_Type;
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@ -20,6 +20,7 @@
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#include <freetype/fterrors.h>
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#include <freetype/internal/ftobjs.h>
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#include <freetype/internal/ftlist.h>
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#include <freetype/fterrors.h>
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/**************************************************************************/
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/**************************************************************************/
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@ -123,7 +124,7 @@
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static
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FT_Error ftc_init_mono_image( FTC_Image_Queue queue,
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FT_Error ftc_init_glyph_image( FTC_Image_Queue queue,
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FTC_ImageNode node )
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{
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FT_Face face;
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@ -136,19 +137,39 @@
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if ( !error )
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{
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FT_UInt glyph_index = FTC_IMAGENODE_GET_GINDEX( node );
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FT_UInt load_flags = FT_LOAD_DEFAULT;
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FT_UInt image_type = queue->descriptor.image_type;
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if ( FTC_IMAGE_FORMAT(image_type) == ftc_image_format_bitmap )
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{
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load_flags |= FT_LOAD_RENDER;
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if ( image_type & ftc_image_flag_monochrome )
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load_flags |= FT_LOAD_MONOCHROME;
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error = FT_Load_Glyph( face, glyph_index,
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FT_LOAD_RENDER | FT_LOAD_MONOCHROME );
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/* disable embedded bitmaps loading if necessary */
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if (load_flags & ftc_image_flag_no_sbits)
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load_flags |= FT_LOAD_NO_BITMAP;
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}
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else if ( FTC_IMAGE_FORMAT(image_type) == ftc_image_format_outline )
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{
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/* disable embedded bitmaps loading */
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load_flags |= FT_LOAD_NO_BITMAP;
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if (image_type & ftc_image_flag_unscaled)
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load_flags |= FT_LOAD_NO_SCALE;
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}
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if (image_type & ftc_image_flag_unhinted)
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load_flags |= FT_LOAD_NO_HINTING;
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if (image_type & ftc_image_flag_autohinted)
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load_flags |= FT_LOAD_FORCE_AUTOHINT;
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error = FT_Load_Glyph( face, glyph_index, load_flags );
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if ( !error )
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{
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if ( face->glyph->format != ft_glyph_format_bitmap ||
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face->glyph->bitmap.pixel_mode != ft_pixel_mode_mono )
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{
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/* there is no monochrome glyph for this font! */
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error = FT_Err_Invalid_Glyph_Index;
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}
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else
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if ( face->glyph->format == ft_glyph_format_bitmap ||
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face->glyph->format == ft_glyph_format_outline )
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{
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/* ok, copy it */
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FT_Glyph glyph;
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@ -158,91 +179,8 @@
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if ( !error )
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FTC_IMAGENODE_SET_GLYPH( node, glyph );
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}
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}
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}
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return error;
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}
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static
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FT_Error ftc_init_gray_image( FTC_Image_Queue queue,
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FTC_ImageNode node )
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{
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FT_Face face;
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FT_Size size;
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FT_Error error;
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error = FTC_Manager_Lookup_Size( queue->manager,
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&queue->descriptor.size,
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&face, &size );
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if ( !error )
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{
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FT_UInt glyph_index = FTC_IMAGENODE_GET_GINDEX( node );
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error = FT_Load_Glyph( face, glyph_index,
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FT_LOAD_RENDER );
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if ( !error )
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{
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if ( face->glyph->format != ft_glyph_format_bitmap ||
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face->glyph->bitmap.pixel_mode != ft_pixel_mode_grays )
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{
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/* there is no anti-aliased glyph for this font! */
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error = FT_Err_Invalid_Glyph_Index;
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}
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else
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{
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/* ok, copy it */
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FT_Glyph glyph;
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error = FT_Get_Glyph( face->glyph, &glyph );
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if ( !error )
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FTC_IMAGENODE_SET_GLYPH( node, glyph );
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}
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}
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}
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return error;
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}
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static
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FT_Error ftc_init_outline_image( FTC_Image_Queue queue,
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FTC_ImageNode node )
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{
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FT_Face face;
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FT_Size size;
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FT_Error error;
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error = FTC_Manager_Lookup_Size( queue->manager,
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&queue->descriptor.size,
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&face, &size );
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if ( !error )
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{
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FT_UInt glyph_index = FTC_IMAGENODE_GET_GINDEX( node );
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error = FT_Load_Glyph( face, glyph_index,
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FT_LOAD_NO_BITMAP );
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if ( !error )
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{
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if ( face->glyph->format != ft_glyph_format_outline )
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{
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/* there is no outline glyph for this font! */
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error = FT_Err_Invalid_Glyph_Index;
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}
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else
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{
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/* ok, copy it */
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FT_Glyph glyph;
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error = FT_Get_Glyph( face->glyph, &glyph );
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if ( !error )
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FTC_IMAGENODE_SET_GLYPH( node, glyph );
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}
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error = FT_Err_Invalid_Argument;
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}
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}
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return error;
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@ -250,60 +188,12 @@
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static
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FT_Error ftc_init_master_outline_image( FTC_Image_Queue queue,
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FTC_ImageNode node )
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{
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FT_Face face;
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FT_Size size;
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FT_Error error;
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error = FTC_Manager_Lookup_Size( queue->manager,
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&queue->descriptor.size,
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&face, &size );
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if ( !error )
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{
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FT_UInt glyph_index = FTC_IMAGENODE_GET_GINDEX( node );
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error = FT_Load_Glyph( face, glyph_index,
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FT_LOAD_NO_SCALE | FT_LOAD_NO_BITMAP );
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if ( !error )
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{
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if ( face->glyph->format != ft_glyph_format_outline )
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{
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/* there is no outline glyph for this font! */
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error = FT_Err_Invalid_Glyph_Index;
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}
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else
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{
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/* ok, copy it */
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FT_Glyph glyph;
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error = FT_Get_Glyph( face->glyph, &glyph );
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if ( !error )
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FTC_IMAGENODE_SET_GLYPH( node, glyph );
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}
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}
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}
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return error;
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}
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static
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const FTC_Image_Class ftc_mono_image_class =
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const FTC_Image_Class ftc_bitmap_image_class =
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{
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ftc_init_mono_image,
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ftc_done_glyph_image,
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ftc_size_bitmap_image
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};
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static
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const FTC_Image_Class ftc_gray_image_class =
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{
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ftc_init_gray_image,
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ftc_init_glyph_image,
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ftc_done_glyph_image,
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ftc_size_bitmap_image
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};
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@ -311,15 +201,7 @@
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static
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const FTC_Image_Class ftc_outline_image_class =
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{
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ftc_init_outline_image,
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ftc_done_glyph_image,
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ftc_size_outline_image
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};
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static
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const FTC_Image_Class ftc_master_outline_image_class =
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{
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ftc_init_master_outline_image,
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ftc_init_glyph_image,
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ftc_done_glyph_image,
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ftc_size_outline_image
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};
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@ -346,29 +228,21 @@
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queue->manager = manager;
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queue->memory = memory;
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queue->descriptor = *desc;
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queue->hash_size = 32;
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queue->hash_size = 64;
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if ( ALLOC_ARRAY( queue->buckets, queue->hash_size, FT_ListRec ) )
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goto Exit;
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switch ( desc->image_type )
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switch (FTC_IMAGE_FORMAT(desc->image_type))
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{
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case ftc_image_mono:
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clazz = &ftc_mono_image_class;
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case ftc_image_format_bitmap:
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clazz = &ftc_bitmap_image_class;
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break;
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case ftc_image_grays:
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clazz = &ftc_gray_image_class;
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break;
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case ftc_image_outline:
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case ftc_image_format_outline:
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clazz = &ftc_outline_image_class;
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break;
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case ftc_image_master_outline:
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clazz = &ftc_master_outline_image_class;
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break;
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default:
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/* invalid image type! */
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error = FT_Err_Invalid_Argument;
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@ -414,6 +288,9 @@
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queue->clazz->done_image( queue, inode );
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FT_List_Remove( glyphs_lru, lrunode );
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cache->num_bytes -= queue->clazz->size_image(queue,inode) +
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sizeof(FTC_ImageNodeRec);
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FTC_ImageNode_Done( cache, inode );
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}
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@ -433,20 +310,24 @@
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FTC_Image_Cache cache = queue->cache;
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FT_UInt hash_index = glyph_index % queue->hash_size;
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FT_List bucket = queue->buckets + hash_index;
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FT_ListNode node, next = 0;
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FT_ListNode node;
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FT_Error error;
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FTC_ImageNode inode;
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*anode = 0;
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for ( node = bucket->head; node; node = next )
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for ( node = bucket->head; node; node = node->next )
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{
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inode = (FTC_ImageNode)node;
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FT_UInt gindex;
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if ( FTC_IMAGENODE_GET_GINDEX( inode ) == glyph_index )
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inode = (FTC_ImageNode)node;
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gindex = FTC_IMAGENODE_GET_GINDEX(inode);
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if ( gindex == glyph_index )
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{
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/* we found it! -- move glyph to start of the list */
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FT_List_Up( bucket, node );
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FT_List_Up( &cache->glyphs_lru, FTC_IMAGENODE_TO_LISTNODE( inode ) );
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*anode = inode;
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return 0;
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}
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@ -473,7 +354,8 @@
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/* insert the node at the start the global LRU glyph list */
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FT_List_Insert( &cache->glyphs_lru, FTC_IMAGENODE_TO_LISTNODE( inode ) );
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cache->num_bytes += queue->clazz->size_image(queue,inode);
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cache->num_bytes += queue->clazz->size_image(queue,inode) +
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sizeof(FTC_ImageNodeRec);
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*anode = inode;
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@ -570,7 +452,7 @@
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{
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while ( cache->num_bytes > cache->max_bytes )
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{
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FT_ListNode cur = cache->glyphs_lru.tail;
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FT_ListNode cur;
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FTC_Image_Queue queue;
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FT_UInt glyph_index;
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FT_UInt hash_index;
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@ -583,6 +465,7 @@
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/* we reached the newly created node (which happens always at the */
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/* start of the list) */
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cur = cache->glyphs_lru.tail;
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inode = FTC_LISTNODE_TO_IMAGENODE( cur );
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if ( !cur || inode == new_node )
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break;
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@ -592,7 +475,8 @@
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queue = (FTC_Image_Queue)cache->queues_lru->
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nodes[queue_index].root.data;
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hash_index = glyph_index % queue->hash_size;
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size = queue->clazz->size_image( queue, inode );
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size = queue->clazz->size_image( queue, inode ) +
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sizeof(FTC_ImageNodeRec);
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FT_List_Remove( &cache->glyphs_lru, cur );
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FT_List_Remove( queue->buckets + hash_index, (FT_ListNode)inode );
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@ -702,7 +586,9 @@
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if ( error )
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goto Exit;
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if (cache->num_bytes > cache->max_bytes)
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FTC_Image_Cache_Compress( cache, inode );
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*aglyph = FTC_IMAGENODE_GET_GLYPH( inode );
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Exit:
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