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;
}
/* convert a slot's glyph image into a bitmap */
static FT_Error
ft_smooth_render( FT_Renderer render,
FT_GlyphSlot slot,
FT_UInt mode,
FT_Vector* origin )
{
FT_Error error;
FT_Outline* outline = NULL;
FT_BBox cbox;
FT_UInt width, height, pitch;
FT_Bitmap* bitmap;
FT_Memory memory;
FT_Raster_Params params;
/* check glyph image format */
if ( slot->format != render->glyph_format )
{
error = Smooth_Err_Invalid_Argument;
goto Exit;
}
/* check mode */
if ( mode != ft_render_mode_normal )
return Smooth_Err_Cannot_Render_Glyph;
outline = &slot->outline;
/* translate the outline to the new origin if needed */
if ( origin )
FT_Outline_Translate( outline, origin->x, origin->y );
/* compute the control box, and grid fit it */
FT_Outline_Get_CBox( outline, &cbox );
cbox.xMin &= -64;
cbox.yMin &= -64;
cbox.xMax = ( cbox.xMax + 63 ) & -64;
cbox.yMax = ( cbox.yMax + 63 ) & -64;
width = ( cbox.xMax - cbox.xMin ) >> 6;
height = ( cbox.yMax - cbox.yMin ) >> 6;
bitmap = &slot->bitmap;
memory = render->root.memory;
/* release old bitmap buffer */
if ( slot->flags & FT_GLYPH_OWN_BITMAP )
{
FT_FREE( bitmap->buffer );
slot->flags &= ~FT_GLYPH_OWN_BITMAP;
}
/* allocate new one, depends on pixel format */
pitch = width;
bitmap->pixel_mode = ft_pixel_mode_grays;
bitmap->num_grays = 256;
bitmap->width = width;
bitmap->rows = height;
bitmap->pitch = pitch;
if ( FT_ALLOC( bitmap->buffer, (FT_ULong)pitch * height ) )
goto Exit;
slot->flags |= FT_GLYPH_OWN_BITMAP;
/* translate outline to render it into the bitmap */
FT_Outline_Translate( outline, -cbox.xMin, -cbox.yMin );
/* set up parameters */
params.target = bitmap;
params.source = outline;
params.flags = ft_raster_flag_aa;
/* render outline into the bitmap */
error = render->raster_render( render->raster, ¶ms );
FT_Outline_Translate( outline, cbox.xMin, cbox.yMin );
if ( error )
goto Exit;
slot->format = ft_glyph_format_bitmap;
slot->bitmap_left = cbox.xMin >> 6;
slot->bitmap_top = cbox.yMax >> 6;
Exit:
if ( outline && origin )
FT_Outline_Translate( outline, -origin->x, -origin->y );
return error;
}
/* convert a slot's glyph image into a bitmap */
static
FT_Error ft_raster1_render(FT_Renderer render,
FT_GlyphSlot slot,
FT_UInt mode,
FT_Vector *origin)
{
FT_Error error;
FT_Outline *outline;
FT_BBox cbox;
FT_UInt width, height, pitch;
FT_Bitmap *bitmap;
FT_Memory memory;
FT_Raster_Params params;
/* check glyph image format */
if(slot->format != render->glyph_format)
{
error = FT_Err_Invalid_Argument;
goto Exit;
}
/* check rendering mode */
if(mode != ft_render_mode_mono)
{
/* raster1 is only capable of producing monochrome bitmaps */
if(render->clazz == &ft_raster1_renderer_class)
{
return FT_Err_Cannot_Render_Glyph;
}
}
else
{
/* raster5 is only capable of producing 5-gray-levels bitmaps */
if(render->clazz == &ft_raster5_renderer_class)
{
return FT_Err_Cannot_Render_Glyph;
}
}
outline = &slot->outline;
/* translate the outline to the new origin if needed */
if(origin)
{
FT_Outline_Translate(outline, origin->x, origin->y);
}
/* compute the control box, and grid fit it */
FT_Outline_Get_CBox(outline, &cbox);
cbox.xMin &= -64;
cbox.yMin &= -64;
cbox.xMax = (cbox.xMax + 63) & - 64;
cbox.yMax = (cbox.yMax + 63) & - 64;
width = (cbox.xMax - cbox.xMin) >> 6;
height = (cbox.yMax - cbox.yMin) >> 6;
bitmap = &slot->bitmap;
memory = render->root.memory;
/* release old bitmap buffer */
if(slot->flags & ft_glyph_own_bitmap)
{
FREE(bitmap->buffer);
slot->flags &= ~ft_glyph_own_bitmap;
}
/* allocate new one, depends on pixel format */
if(!(mode & ft_render_mode_mono))
{
/* we pad to 32 bits, only for backwards compatibility with FT 1.x */
pitch = (width + 3) & - 4;
bitmap->pixel_mode = ft_pixel_mode_grays;
bitmap->num_grays = 256;
}
else
{
pitch = (width + 7) >> 3;
bitmap->pixel_mode = ft_pixel_mode_mono;
}
bitmap->width = width;
bitmap->rows = height;
bitmap->pitch = pitch;
if(ALLOC(bitmap->buffer, (FT_ULong)pitch * height))
{
goto Exit;
}
slot->flags |= ft_glyph_own_bitmap;
/* translate outline to render it into the bitmap */
FT_Outline_Translate(outline, -cbox.xMin, -cbox.yMin);
/* set up parameters */
params.target = bitmap;
params.source = outline;
params.flags = 0;
if(bitmap->pixel_mode == ft_pixel_mode_grays)
{
params.flags |= ft_raster_flag_aa;
}
/* render outline into the bitmap */
error = render->raster_render(render->raster, ¶ms);
if(error)
{
goto Exit;
}
slot->format = ft_glyph_format_bitmap;
slot->bitmap_left = cbox.xMin >> 6;
slot->bitmap_top = cbox.yMax >> 6;
Exit:
return error;
}
/* convert a slot's glyph image into a bitmap */
static FT_Error
ft_smooth_render_generic( FT_Renderer render,
FT_GlyphSlot slot,
FT_Render_Mode mode,
const FT_Vector* origin,
FT_Render_Mode required_mode,
FT_Int hmul,
FT_Int vmul )
{
FT_Error error;
FT_Outline* outline = NULL;
FT_BBox cbox;
FT_UInt width, height, pitch;
FT_Bitmap* bitmap;
FT_Memory memory;
FT_Raster_Params params;
/* check glyph image format */
if ( slot->format != render->glyph_format )
{
error = Smooth_Err_Invalid_Argument;
goto Exit;
}
/* check mode */
if ( mode != required_mode )
return Smooth_Err_Cannot_Render_Glyph;
outline = &slot->outline;
/* translate the outline to the new origin if needed */
if ( origin )
FT_Outline_Translate( outline, origin->x, origin->y );
/* compute the control box, and grid fit it */
FT_Outline_Get_CBox( outline, &cbox );
cbox.xMin = FT_PIX_FLOOR( cbox.xMin );
cbox.yMin = FT_PIX_FLOOR( cbox.yMin );
cbox.xMax = FT_PIX_CEIL( cbox.xMax );
cbox.yMax = FT_PIX_CEIL( cbox.yMax );
width = (FT_UInt)( ( cbox.xMax - cbox.xMin ) >> 6 );
height = (FT_UInt)( ( cbox.yMax - cbox.yMin ) >> 6 );
bitmap = &slot->bitmap;
memory = render->root.memory;
/* release old bitmap buffer */
if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP )
{
FT_FREE( bitmap->buffer );
slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP;
}
/* allocate new one, depends on pixel format */
pitch = width;
if ( hmul )
{
width = width * hmul;
pitch = FT_PAD_CEIL( width, 4 );
}
if ( vmul )
height *= vmul;
bitmap->pixel_mode = FT_PIXEL_MODE_GRAY;
bitmap->num_grays = 256;
bitmap->width = width;
bitmap->rows = height;
bitmap->pitch = pitch;
if ( FT_ALLOC( bitmap->buffer, (FT_ULong)pitch * height ) )
goto Exit;
slot->internal->flags |= FT_GLYPH_OWN_BITMAP;
/* translate outline to render it into the bitmap */
FT_Outline_Translate( outline, -cbox.xMin, -cbox.yMin );
/* set up parameters */
params.target = bitmap;
params.source = outline;
params.flags = FT_RASTER_FLAG_AA;
/* implode outline if needed */
{
FT_Int n;
FT_Vector* vec;
if ( hmul )
for ( vec = outline->points, n = 0; n < outline->n_points; n++, vec++ )
vec->x *= hmul;
if ( vmul )
for ( vec = outline->points, n = 0; n < outline->n_points; n++, vec++ )
vec->y *= vmul;
}
/* render outline into the bitmap */
error = render->raster_render( render->raster, ¶ms );
/* deflate outline if needed */
{
FT_Int n;
FT_Vector* vec;
if ( hmul )
for ( vec = outline->points, n = 0; n < outline->n_points; n++, vec++ )
vec->x /= hmul;
if ( vmul )
for ( vec = outline->points, n = 0; n < outline->n_points; n++, vec++ )
vec->y /= vmul;
}
FT_Outline_Translate( outline, cbox.xMin, cbox.yMin );
if ( error )
goto Exit;
slot->format = FT_GLYPH_FORMAT_BITMAP;
slot->bitmap_left = (FT_Int)( cbox.xMin >> 6 );
slot->bitmap_top = (FT_Int)( cbox.yMax >> 6 );
Exit:
if ( outline && origin )
FT_Outline_Translate( outline, -origin->x, -origin->y );
return error;
}
