diff options
Diffstat (limited to 'Build/source/libs/freetype2/freetype-src/src/sdf/ftsdfrend.c')
-rw-r--r-- | Build/source/libs/freetype2/freetype-src/src/sdf/ftsdfrend.c | 590 |
1 files changed, 0 insertions, 590 deletions
diff --git a/Build/source/libs/freetype2/freetype-src/src/sdf/ftsdfrend.c b/Build/source/libs/freetype2/freetype-src/src/sdf/ftsdfrend.c deleted file mode 100644 index 420ad496c74..00000000000 --- a/Build/source/libs/freetype2/freetype-src/src/sdf/ftsdfrend.c +++ /dev/null @@ -1,590 +0,0 @@ -/**************************************************************************** - * - * ftsdfrend.c - * - * Signed Distance Field renderer interface (body). - * - * Copyright (C) 2020-2021 by - * David Turner, Robert Wilhelm, and Werner Lemberg. - * - * Written by Anuj Verma. - * - * This file is part of the FreeType project, and may only be used, - * modified, and distributed under the terms of the FreeType project - * license, LICENSE.TXT. By continuing to use, modify, or distribute - * this file you indicate that you have read the license and - * understand and accept it fully. - * - */ - - -#include <freetype/internal/ftdebug.h> -#include <freetype/internal/ftobjs.h> -#include <freetype/internal/services/svprop.h> -#include <freetype/ftoutln.h> -#include <freetype/ftbitmap.h> -#include "ftsdfrend.h" -#include "ftsdf.h" - -#include "ftsdferrs.h" - - - /************************************************************************** - * - * The macro FT_COMPONENT is used in trace mode. It is an implicit - * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log - * messages during execution. - */ -#undef FT_COMPONENT -#define FT_COMPONENT sdf - - - /************************************************************************** - * - * macros and default property values - * - */ -#define SDF_RENDERER( rend ) ( (SDF_Renderer)rend ) - - - /************************************************************************** - * - * for setting properties - * - */ - - /* property setter function */ - static FT_Error - sdf_property_set( FT_Module module, - const char* property_name, - const void* value, - FT_Bool value_is_string ) - { - FT_Error error = FT_Err_Ok; - SDF_Renderer render = SDF_RENDERER( FT_RENDERER( module ) ); - - FT_UNUSED( value_is_string ); - - - if ( ft_strcmp( property_name, "spread" ) == 0 ) - { - FT_Int val = *(const FT_Int*)value; - - - if ( val > MAX_SPREAD || val < MIN_SPREAD ) - { - FT_TRACE0(( "[sdf] sdf_property_set:" - " the `spread' property can have a value\n" )); - FT_TRACE0(( " " - " within range [%d, %d] (value provided: %d)\n", - MIN_SPREAD, MAX_SPREAD, val )); - - error = FT_THROW( Invalid_Argument ); - goto Exit; - } - - render->spread = (FT_UInt)val; - FT_TRACE7(( "[sdf] sdf_property_set:" - " updated property `spread' to %d\n", val )); - } - - else if ( ft_strcmp( property_name, "flip_sign" ) == 0 ) - { - FT_Int val = *(const FT_Int*)value; - - - render->flip_sign = val ? 1 : 0; - FT_TRACE7(( "[sdf] sdf_property_set:" - " updated property `flip_sign' to %d\n", val )); - } - - else if ( ft_strcmp( property_name, "flip_y" ) == 0 ) - { - FT_Int val = *(const FT_Int*)value; - - - render->flip_y = val ? 1 : 0; - FT_TRACE7(( "[sdf] sdf_property_set:" - " updated property `flip_y' to %d\n", val )); - } - - else if ( ft_strcmp( property_name, "overlaps" ) == 0 ) - { - FT_Bool val = *(const FT_Bool*)value; - - - render->overlaps = val; - FT_TRACE7(( "[sdf] sdf_property_set:" - " updated property `overlaps' to %d\n", val )); - } - - else - { - FT_TRACE0(( "[sdf] sdf_property_set:" - " missing property `%s'\n", property_name )); - error = FT_THROW( Missing_Property ); - } - - Exit: - return error; - } - - - /* property getter function */ - static FT_Error - sdf_property_get( FT_Module module, - const char* property_name, - void* value ) - { - FT_Error error = FT_Err_Ok; - SDF_Renderer render = SDF_RENDERER( FT_RENDERER( module ) ); - - - if ( ft_strcmp( property_name, "spread" ) == 0 ) - { - FT_UInt* val = (FT_UInt*)value; - - - *val = render->spread; - } - - else if ( ft_strcmp( property_name, "flip_sign" ) == 0 ) - { - FT_Int* val = (FT_Int*)value; - - - *val = render->flip_sign; - } - - else if ( ft_strcmp( property_name, "flip_y" ) == 0 ) - { - FT_Int* val = (FT_Int*)value; - - - *val = render->flip_y; - } - - else if ( ft_strcmp( property_name, "overlaps" ) == 0 ) - { - FT_Int* val = (FT_Int*)value; - - - *val = render->overlaps; - } - - else - { - FT_TRACE0(( "[sdf] sdf_property_get:" - " missing property `%s'\n", property_name )); - error = FT_THROW( Missing_Property ); - } - - return error; - } - - - FT_DEFINE_SERVICE_PROPERTIESREC( - sdf_service_properties, - - (FT_Properties_SetFunc)sdf_property_set, /* set_property */ - (FT_Properties_GetFunc)sdf_property_get ) /* get_property */ - - - FT_DEFINE_SERVICEDESCREC1( - sdf_services, - - FT_SERVICE_ID_PROPERTIES, &sdf_service_properties ) - - - static FT_Module_Interface - ft_sdf_requester( FT_Renderer render, - const char* module_interface ) - { - FT_UNUSED( render ); - - return ft_service_list_lookup( sdf_services, module_interface ); - } - - - /*************************************************************************/ - /*************************************************************************/ - /** **/ - /** OUTLINE TO SDF CONVERTER **/ - /** **/ - /*************************************************************************/ - /*************************************************************************/ - - /************************************************************************** - * - * interface functions - * - */ - - static FT_Error - ft_sdf_init( FT_Renderer render ) - { - SDF_Renderer sdf_render = SDF_RENDERER( render ); - - - sdf_render->spread = DEFAULT_SPREAD; - sdf_render->flip_sign = 0; - sdf_render->flip_y = 0; - sdf_render->overlaps = 0; - - return FT_Err_Ok; - } - - - static void - ft_sdf_done( FT_Renderer render ) - { - FT_UNUSED( render ); - } - - - /* generate signed distance field from a glyph's slot image */ - static FT_Error - ft_sdf_render( FT_Renderer module, - FT_GlyphSlot slot, - FT_Render_Mode mode, - const FT_Vector* origin ) - { - FT_Error error = FT_Err_Ok; - FT_Outline* outline = &slot->outline; - FT_Bitmap* bitmap = &slot->bitmap; - FT_Memory memory = NULL; - FT_Renderer render = NULL; - - FT_Pos x_shift = 0; - FT_Pos y_shift = 0; - - FT_Pos x_pad = 0; - FT_Pos y_pad = 0; - - SDF_Raster_Params params; - SDF_Renderer sdf_module = SDF_RENDERER( module ); - - - render = &sdf_module->root; - memory = render->root.memory; - - /* check whether slot format is correct before rendering */ - if ( slot->format != render->glyph_format ) - { - error = FT_THROW( Invalid_Glyph_Format ); - goto Exit; - } - - /* check whether render mode is correct */ - if ( mode != FT_RENDER_MODE_SDF ) - { - error = FT_THROW( Cannot_Render_Glyph ); - goto Exit; - } - - /* deallocate the previously allocated bitmap */ - if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) - { - FT_FREE( bitmap->buffer ); - slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP; - } - - /* preset the bitmap using the glyph's outline; */ - /* the sdf bitmap is similar to an anti-aliased bitmap */ - /* with a slightly bigger size and different pixel mode */ - if ( ft_glyphslot_preset_bitmap( slot, FT_RENDER_MODE_NORMAL, origin ) ) - { - error = FT_THROW( Raster_Overflow ); - goto Exit; - } - - if ( !bitmap->rows || !bitmap->pitch ) - goto Exit; - - /* the padding will simply be equal to the `spread' */ - x_pad = sdf_module->spread; - y_pad = sdf_module->spread; - - /* apply the padding; will be in all the directions */ - bitmap->rows += y_pad * 2; - bitmap->width += x_pad * 2; - - /* ignore the pitch, pixel mode and set custom */ - bitmap->pixel_mode = FT_PIXEL_MODE_GRAY; - bitmap->pitch = (int)( bitmap->width ); - bitmap->num_grays = 255; - - /* allocate new buffer */ - if ( FT_ALLOC_MULT( bitmap->buffer, bitmap->rows, bitmap->pitch ) ) - goto Exit; - - slot->internal->flags |= FT_GLYPH_OWN_BITMAP; - - slot->bitmap_top += y_pad; - slot->bitmap_left -= x_pad; - - x_shift = 64 * -slot->bitmap_left; - y_shift = 64 * -slot->bitmap_top; - y_shift += 64 * (FT_Int)bitmap->rows; - - if ( origin ) - { - x_shift += origin->x; - y_shift += origin->y; - } - - /* translate outline to render it into the bitmap */ - if ( x_shift || y_shift ) - FT_Outline_Translate( outline, x_shift, y_shift ); - - /* set up parameters */ - params.root.target = bitmap; - params.root.source = outline; - params.root.flags = FT_RASTER_FLAG_SDF; - params.spread = sdf_module->spread; - params.flip_sign = sdf_module->flip_sign; - params.flip_y = sdf_module->flip_y; - params.overlaps = sdf_module->overlaps; - - /* render the outline */ - error = render->raster_render( render->raster, - (const FT_Raster_Params*)¶ms ); - - Exit: - if ( !error ) - { - /* the glyph is successfully rendered to a bitmap */ - slot->format = FT_GLYPH_FORMAT_BITMAP; - } - else if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) - { - FT_FREE( bitmap->buffer ); - slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP; - } - - if ( x_shift || y_shift ) - FT_Outline_Translate( outline, -x_shift, -y_shift ); - - return error; - } - - - /* transform the glyph using matrix and/or delta */ - static FT_Error - ft_sdf_transform( FT_Renderer render, - FT_GlyphSlot slot, - const FT_Matrix* matrix, - const FT_Vector* delta ) - { - FT_Error error = FT_Err_Ok; - - - if ( slot->format != render->glyph_format ) - { - error = FT_THROW( Invalid_Argument ); - goto Exit; - } - - if ( matrix ) - FT_Outline_Transform( &slot->outline, matrix ); - - if ( delta ) - FT_Outline_Translate( &slot->outline, delta->x, delta->y ); - - Exit: - return error; - } - - - /* return the control box of a glyph's outline */ - static void - ft_sdf_get_cbox( FT_Renderer render, - FT_GlyphSlot slot, - FT_BBox* cbox ) - { - FT_ZERO( cbox ); - - if ( slot->format == render->glyph_format ) - FT_Outline_Get_CBox( &slot->outline, cbox ); - } - - - /* set render specific modes or attributes */ - static FT_Error - ft_sdf_set_mode( FT_Renderer render, - FT_ULong mode_tag, - FT_Pointer data ) - { - /* pass it to the rasterizer */ - return render->clazz->raster_class->raster_set_mode( render->raster, - mode_tag, - data ); - } - - - FT_DEFINE_RENDERER( - ft_sdf_renderer_class, - - FT_MODULE_RENDERER, - sizeof ( SDF_Renderer_Module ), - - "sdf", - 0x10000L, - 0x20000L, - - NULL, - - (FT_Module_Constructor)ft_sdf_init, - (FT_Module_Destructor) ft_sdf_done, - (FT_Module_Requester) ft_sdf_requester, - - FT_GLYPH_FORMAT_OUTLINE, - - (FT_Renderer_RenderFunc) ft_sdf_render, /* render_glyph */ - (FT_Renderer_TransformFunc)ft_sdf_transform, /* transform_glyph */ - (FT_Renderer_GetCBoxFunc) ft_sdf_get_cbox, /* get_glyph_cbox */ - (FT_Renderer_SetModeFunc) ft_sdf_set_mode, /* set_mode */ - - (FT_Raster_Funcs*)&ft_sdf_raster /* raster_class */ - ) - - - /*************************************************************************/ - /*************************************************************************/ - /** **/ - /** BITMAP TO SDF CONVERTER **/ - /** **/ - /*************************************************************************/ - /*************************************************************************/ - - /* generate signed distance field from glyph's bitmap */ - static FT_Error - ft_bsdf_render( FT_Renderer module, - FT_GlyphSlot slot, - FT_Render_Mode mode, - const FT_Vector* origin ) - { - FT_Error error = FT_Err_Ok; - FT_Memory memory = NULL; - - FT_Bitmap* bitmap = &slot->bitmap; - FT_Renderer render = NULL; - FT_Bitmap target; - - FT_Pos x_pad = 0; - FT_Pos y_pad = 0; - - SDF_Raster_Params params; - SDF_Renderer sdf_module = SDF_RENDERER( module ); - - - /* initialize the bitmap in case any error occurs */ - FT_Bitmap_Init( &target ); - - render = &sdf_module->root; - memory = render->root.memory; - - /* check whether slot format is correct before rendering */ - if ( slot->format != render->glyph_format ) - { - error = FT_THROW( Invalid_Glyph_Format ); - goto Exit; - } - - /* check whether render mode is correct */ - if ( mode != FT_RENDER_MODE_SDF ) - { - error = FT_THROW( Cannot_Render_Glyph ); - goto Exit; - } - - if ( origin ) - { - FT_ERROR(( "ft_bsdf_render: can't translate the bitmap\n" )); - - error = FT_THROW( Unimplemented_Feature ); - goto Exit; - } - - if ( !bitmap->rows || !bitmap->pitch ) - goto Exit; - - FT_Bitmap_New( &target ); - - /* padding will simply be equal to `spread` */ - x_pad = sdf_module->spread; - y_pad = sdf_module->spread; - - /* apply padding, which extends to all directions */ - target.rows = bitmap->rows + y_pad * 2; - target.width = bitmap->width + x_pad * 2; - - /* set up the target bitmap */ - target.pixel_mode = FT_PIXEL_MODE_GRAY; - target.pitch = (int)( target.width ); - target.num_grays = 255; - - if ( FT_ALLOC_MULT( target.buffer, target.rows, target.pitch ) ) - goto Exit; - - /* set up parameters */ - params.root.target = ⌖ - params.root.source = bitmap; - params.root.flags = FT_RASTER_FLAG_SDF; - params.spread = sdf_module->spread; - params.flip_sign = sdf_module->flip_sign; - params.flip_y = sdf_module->flip_y; - - error = render->raster_render( render->raster, - (const FT_Raster_Params*)¶ms ); - - Exit: - if ( !error ) - { - /* the glyph is successfully converted to a SDF */ - if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) - { - FT_FREE( bitmap->buffer ); - slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP; - } - - slot->bitmap = target; - slot->bitmap_top += y_pad; - slot->bitmap_left -= x_pad; - slot->internal->flags |= FT_GLYPH_OWN_BITMAP; - } - else if ( target.buffer ) - FT_FREE( target.buffer ); - - return error; - } - - - FT_DEFINE_RENDERER( - ft_bitmap_sdf_renderer_class, - - FT_MODULE_RENDERER, - sizeof ( SDF_Renderer_Module ), - - "bsdf", - 0x10000L, - 0x20000L, - - NULL, - - (FT_Module_Constructor)ft_sdf_init, - (FT_Module_Destructor) ft_sdf_done, - (FT_Module_Requester) ft_sdf_requester, - - FT_GLYPH_FORMAT_BITMAP, - - (FT_Renderer_RenderFunc) ft_bsdf_render, /* render_glyph */ - (FT_Renderer_TransformFunc)ft_sdf_transform, /* transform_glyph */ - (FT_Renderer_GetCBoxFunc) ft_sdf_get_cbox, /* get_glyph_cbox */ - (FT_Renderer_SetModeFunc) ft_sdf_set_mode, /* set_mode */ - - (FT_Raster_Funcs*)&ft_bitmap_sdf_raster /* raster_class */ - ) - - -/* END */ |