forked from minhngoc25a/freetype2
Adds transform support for OT-SVG glyphs.
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@ -268,6 +268,12 @@ FT_BEGIN_HEADER
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* end_glyph_id ::
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* The ending glyph ID for the glyph range that this document has.
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*
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* transform ::
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* Transformation matrix to apply on the glyph while rendering.
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*
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* delta ::
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* Translation to apply on the glyph while rendering.
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*
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* @note:
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* `metrics` and `units_per_EM` might look like repetitions since both
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* fields are stored in face objects. However, the Glyph Management API
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@ -289,7 +295,8 @@ FT_BEGIN_HEADER
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FT_UShort units_per_EM;
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FT_UShort start_glyph_id;
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FT_UShort end_glyph_id;
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/* TODO: (OT-SVG) Maybe put a transformation matrix here */
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FT_Matrix transform;
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FT_Vector delta;
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} FT_SvgGlyphRec;
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@ -147,6 +147,12 @@ FT_BEGIN_HEADER
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* end_glyph_id ::
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* The ending glyph ID for the glyph range that this document has.
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*
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* transform ::
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* Transformation matrix to apply on the glyph while rendering.
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*
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* delta ::
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* Translation to apply on the glyph while rendering.
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*
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* @note:
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* `metrics` and `units_per_EM` might look like repetitions since both
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* fields are stored in face object, but they are not; When the slot is
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@ -165,6 +171,8 @@ FT_BEGIN_HEADER
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FT_UShort units_per_EM;
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FT_UShort start_glyph_id;
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FT_UShort end_glyph_id;
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FT_Matrix transform;
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FT_Vector delta;
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} FT_SVG_DocumentRec;
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/**************************************************************************
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@ -326,6 +326,9 @@
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glyph->units_per_EM = document->units_per_EM;
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glyph->start_glyph_id = document->start_glyph_id;
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glyph->end_glyph_id = document->end_glyph_id;
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glyph->transform = document->transform;
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glyph->delta = document->delta;
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/* copy the document into glyph */
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FT_MEM_COPY( glyph->svg_document, document->svg_document, doc_length );
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@ -372,6 +375,8 @@
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target->units_per_EM = source->units_per_EM;
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target->start_glyph_id = source->start_glyph_id;
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target->end_glyph_id = source->end_glyph_id;
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target->transform = source->transform;
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target->delta = source->delta;
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/* allocate space for the svg document */
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target->svg_document = memory->alloc( memory,
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@ -385,6 +390,29 @@
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return error;
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}
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FT_CALLBACK_DEF( void )
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ft_svg_glyph_transform( FT_Glyph svg_glyph,
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const FT_Matrix* matrix,
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const FT_Vector* delta )
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{
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FT_SvgGlyph glyph = (FT_SvgGlyph)svg_glyph;
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if ( matrix )
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{
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FT_Matrix a, b;
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a = glyph->transform;
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b = *matrix;
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FT_Matrix_Multiply( &b, &a );
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glyph->transform = a;
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}
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if ( delta )
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{
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glyph->delta.x = ADD_LONG( glyph->delta.x, delta->x );
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glyph->delta.y = ADD_LONG( glyph->delta.y, delta->y );
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}
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}
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FT_CALLBACK_DEF( FT_Error )
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ft_svg_glyph_prepare( FT_Glyph svg_glyph,
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FT_GlyphSlot slot )
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@ -404,6 +432,8 @@
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document->units_per_EM = glyph->units_per_EM;
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document->start_glyph_id = glyph->start_glyph_id;
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document->end_glyph_id = glyph->end_glyph_id;
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document->transform = glyph->transform;
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document->delta = glyph->delta;
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slot->format = FT_GLYPH_FORMAT_SVG;
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slot->glyph_index = glyph->glyph_index;
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@ -421,7 +451,7 @@
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ft_svg_glyph_init, /* FT_Glyph_InitFunc glyph_init */
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ft_svg_glyph_done, /* FT_Glyph_DoneFunc glyph_done */
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ft_svg_glyph_copy, /* FT_Glyph_CopyFunc glyph_copy */
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NULL, /* FT_Glyph_TransformFunc glyph_transform */
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ft_svg_glyph_transform, /* FT_Glyph_TransformFunc glyph_transform */
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NULL, /* FT_Glyph_GetBBoxFunc glyph_bbox */
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ft_svg_glyph_prepare /* FT_Glyph_PrepareFunc glyph_prepare */
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)
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@ -320,6 +320,13 @@
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svg_document->start_glyph_id = start_glyph_id;
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svg_document->end_glyph_id = end_glyph_id;
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svg_document->transform.xx = 0x10000;
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svg_document->transform.xy = 0;
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svg_document->transform.yx = 0;
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svg_document->transform.yy = 0x10000;
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svg_document->delta.x = 0;
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svg_document->delta.y = 0;
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FT_TRACE5(( "start_glyph_id: %d\n", start_glyph_id ));
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FT_TRACE5(( "end_glyph_id: %d\n", end_glyph_id ));
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FT_TRACE5(( "svg_document:\n%.*s\n", doc_length, doc_list ));
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@ -187,6 +187,32 @@
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return 0;
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}
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static FT_Error
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ft_svg_transform( FT_Renderer renderer,
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FT_GlyphSlot slot,
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const FT_Matrix* matrix,
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const FT_Vector* delta )
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{
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FT_SVG_Document doc = (FT_SVG_Document)slot->other;
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if ( matrix )
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{
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FT_Matrix a, b;
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a = doc->transform;
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b = *matrix;
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FT_Matrix_Multiply( &b, &a );
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doc->transform = a;
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}
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if ( delta )
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{
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doc->delta.x = ADD_LONG( doc->delta.x, delta->x );
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doc->delta.y = ADD_LONG( doc->delta.y, delta->y );
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}
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return FT_Err_Ok;
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}
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#endif
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#ifdef FT_CONFIG_OPTION_SVG
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@ -213,7 +239,7 @@
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PUT_SVG_MODULE( ft_svg_get_interface ), /* get_interface */
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SVG_GLYPH_FORMAT,
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(FT_Renderer_RenderFunc)PUT_SVG_MODULE( ft_svg_render ),
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NULL,
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(FT_Renderer_TransformFunc)PUT_SVG_MODULE( ft_svg_transform ),
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NULL,
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NULL,
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NULL
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