FT_Outline_Render( FT_Library library,
FT_Outline* outline,
FT_Raster_Params* params )
{
FT_Error error;
FT_Bool update = 0;
FT_Renderer renderer;
FT_ListNode node;
if ( !library )
return FT_Err_Invalid_Library_Handle;
if ( !outline || !params )
return FT_Err_Invalid_Argument;
renderer = library->cur_renderer;
node = library->renderers.head;
params->source = (void*)outline;
error = FT_Err_Cannot_Render_Glyph;
while ( renderer )
{
error = renderer->raster_render( renderer->raster, params );
if ( !error || FT_ERROR_BASE( error ) != FT_Err_Cannot_Render_Glyph )
break;
/* FT_Err_Cannot_Render_Glyph is returned if the render mode */
/* is unsupported by the current renderer for this glyph image */
/* format */
/* now, look for another renderer that supports the same */
/* format */
renderer = FT_Lookup_Renderer( library, FT_GLYPH_FORMAT_OUTLINE,
&node );
update = 1;
}
/* if we changed the current renderer for the glyph image format */
/* we need to select it as the next current one */
if ( !error && update && renderer )
FT_Set_Renderer( library, renderer, 0, 0 );
return error;
}
FT_Outline_Render( FT_Library library,
FT_Outline* outline,
FT_Raster_Params* params )
{
FT_Error error;
FT_Renderer renderer;
FT_ListNode node;
if ( !library )
return FT_THROW( Invalid_Library_Handle );
if ( !outline )
return FT_THROW( Invalid_Outline );
if ( !params )
return FT_THROW( Invalid_Argument );
renderer = library->cur_renderer;
node = library->renderers.head;
params->source = (void*)outline;
error = FT_ERR( Cannot_Render_Glyph );
while ( renderer )
{
error = renderer->raster_render( renderer->raster, params );
if ( !error || FT_ERR_NEQ( error, Cannot_Render_Glyph ) )
break;
/* FT_Err_Cannot_Render_Glyph is returned if the render mode */
/* is unsupported by the current renderer for this glyph image */
/* format */
/* now, look for another renderer that supports the same */
/* format */
renderer = FT_Lookup_Renderer( library, FT_GLYPH_FORMAT_OUTLINE,
&node );
}
return error;
}
FT_Get_Glyph( FT_GlyphSlot slot,
FT_Glyph *aglyph )
{
FT_Library library;
FT_Error error;
FT_Glyph glyph;
const FT_Glyph_Class* clazz = 0;
if ( !slot )
return FT_Err_Invalid_Slot_Handle;
library = slot->library;
if ( !aglyph )
return FT_Err_Invalid_Argument;
/* if it is a bitmap, that's easy :-) */
if ( slot->format == FT_GLYPH_FORMAT_BITMAP )
clazz = FT_BITMAP_GLYPH_CLASS_GET;
/* if it is an outline */
else if ( slot->format == FT_GLYPH_FORMAT_OUTLINE )
clazz = FT_OUTLINE_GLYPH_CLASS_GET;
else
{
/* try to find a renderer that supports the glyph image format */
FT_Renderer render = FT_Lookup_Renderer( library, slot->format, 0 );
if ( render )
clazz = &render->glyph_class;
}
if ( !clazz )
{
error = FT_Err_Invalid_Glyph_Format;
goto Exit;
}
/* create FT_Glyph object */
error = ft_new_glyph( library, clazz, &glyph );
if ( error )
goto Exit;
/* copy advance while converting it to 16.16 format */
glyph->advance.x = slot->advance.x << 10;
glyph->advance.y = slot->advance.y << 10;
/* now import the image from the glyph slot */
error = clazz->glyph_init( glyph, slot );
/* if an error occurred, destroy the glyph */
if ( error )
FT_Done_Glyph( glyph );
else
*aglyph = glyph;
Exit:
return error;
}
FT_EXPORT_FUNC(FT_Error) FT_Get_Glyph(FT_GlyphSlot slot,
FT_Glyph *aglyph)
{
FT_Library library = slot->library;
FT_Error error;
FT_Glyph glyph;
const FT_Glyph_Class *clazz = 0;
if(!slot)
{
return FT_Err_Invalid_Slot_Handle;
}
if(!aglyph)
{
return FT_Err_Invalid_Argument;
}
/* if it is a bitmap, that's easy :-) */
if(slot->format == ft_glyph_format_bitmap)
{
clazz = &ft_bitmap_glyph_class;
}
/* it it is an outline too */
else if(slot->format == ft_glyph_format_outline)
{
clazz = &ft_outline_glyph_class;
}
else
{
/* try to find a renderer that supports the glyph image format */
FT_Renderer render = FT_Lookup_Renderer(library, slot->format, 0);
if(render)
{
clazz = &render->glyph_class;
}
}
if(!clazz)
{
error = FT_Err_Invalid_Glyph_Format;
goto Exit;
}
/* create FT_Glyph object */
error = ft_new_glyph(library, clazz, &glyph);
if(error)
{
goto Exit;
}
/* copy advance while converting it to 16.16 format */
glyph->advance.x = slot->advance.x << 10;
glyph->advance.y = slot->advance.y << 10;
/* now import the image from the glyph slot */
error = clazz->glyph_init(glyph, slot);
/* if an error occurred, destroy the glyph */
if(error)
{
FT_Done_Glyph(glyph);
}
else
{
*aglyph = glyph;
}
Exit:
return error;
}
FT_Get_Glyph( FT_GlyphSlot slot,
FT_Glyph *aglyph )
{
FT_Library library;
FT_Error error;
FT_Glyph glyph;
const FT_Glyph_Class* clazz = NULL;
if ( !slot )
return FT_THROW( Invalid_Slot_Handle );
library = slot->library;
if ( !aglyph )
return FT_THROW( Invalid_Argument );
/* if it is a bitmap, that's easy :-) */
if ( slot->format == FT_GLYPH_FORMAT_BITMAP )
clazz = FT_BITMAP_GLYPH_CLASS_GET;
/* if it is an outline */
else if ( slot->format == FT_GLYPH_FORMAT_OUTLINE )
clazz = FT_OUTLINE_GLYPH_CLASS_GET;
else
{
/* try to find a renderer that supports the glyph image format */
FT_Renderer render = FT_Lookup_Renderer( library, slot->format, 0 );
if ( render )
clazz = &render->glyph_class;
}
if ( !clazz )
{
error = FT_THROW( Invalid_Glyph_Format );
goto Exit;
}
/* create FT_Glyph object */
error = ft_new_glyph( library, clazz, &glyph );
if ( error )
goto Exit;
/* copy advance while converting 26.6 to 16.16 format */
if ( slot->advance.x >= 0x8000L * 64 ||
slot->advance.x <= -0x8000L * 64 )
{
FT_ERROR(( "FT_Get_Glyph: advance width too large\n" ));
error = FT_THROW( Invalid_Argument );
goto Exit2;
}
if ( slot->advance.y >= 0x8000L * 64 ||
slot->advance.y <= -0x8000L * 64 )
{
FT_ERROR(( "FT_Get_Glyph: advance height too large\n" ));
error = FT_THROW( Invalid_Argument );
goto Exit2;
}
glyph->advance.x = slot->advance.x * 1024;
glyph->advance.y = slot->advance.y * 1024;
/* now import the image from the glyph slot */
error = clazz->glyph_init( glyph, slot );
Exit2:
/* if an error occurred, destroy the glyph */
if ( error )
FT_Done_Glyph( glyph );
else
*aglyph = glyph;
Exit:
return error;
}
