image Namespace Reference

Functions to load and save images from/to disk. More...

Classes
class	adjust_alpha_modification
	Adjust Alpha (ADJUST_ALPHA) modification. More...
class	adjust_channels_modification
	Adjust Channels (CHAN) modification. More...
struct	background_modification
	Fill background with a color (BG). More...
class	bl_modification
	Gaussian-like blur (BL) modification. More...
class	blend_modification
	Color blending (BLEND) modification. More...
class	blit_modification
	Scale (BLIT) modification. More...
class	bw_modification
	Black and white (BW) modification. More...
class	cache_type
class	crop_modification
	Crop (CROP) modification. More...
class	cs_modification
	Color-shift (CS, R, G, B) modification. More...
class	fl_modification
	Mirror (FL) modification. More...
class	gs_modification
	Grayscale (GS) modification. More...
class	light_modification
	LIGHT (L) modification. More...
class	locator
	Generic locator abstracting the location of an image. More...
struct	manager
	Image cache manager. More...
class	mask_modification
	Mask (MASK) modification. More...
class	modification
	Base abstract class for an image-path modification. More...
class	modification_queue
	A modified priority queue used to order image modifications. More...
class	negative_modification
	Make an image negative (NEG) More...
class	o_modification
	Opacity (O) modification. More...
class	pixel_callable
class	plot_alpha_modification
	Plot Alpha (Alpha) modification. More...
class	rc_modification
	Recolor (RC/TC/PAL) modification. More...
class	rotate_modification
	Rotate (ROTATE) modification. More...
class	scale_exact_modification
	Scale exact modification. More...
class	scale_into_modification
	Scale into (SCALE_INTO) modification. More...
class	scale_modification
	Scaling modifications base class. More...
struct	sepia_modification
	Give to the image a sepia tint (SEPIA) More...
class	swap_modification
	Channel swap (SWAP). More...
class	wipe_alpha_modification
	Wipe Alpha (Wipe_Alpha) modification. More...
class	xbrz_modification
	xBRZ scale (xBRZ) modification More...

Typedefs
typedef cache_type< surface >	image_cache
typedef cache_type< bool >	bool_cache
typedef std::map< t_translation::terrain_code, surface >	mini_terrain_cache_map
typedef std::basic_string< signed char >	light_string
	Type used to store color information of central and adjacent hexes. More...
typedef std::map< light_string, surface >	lit_variants
	Type used to pair light possibilities with the corresponding lit surface. More...
typedef cache_type< lit_variants >	lit_cache
	Lit variants for each locator. More...

Enumerations
enum	TYPE {   UNSCALED, SCALED_TO_ZOOM, HEXED, SCALED_TO_HEX,   TOD_COLORED, BRIGHTENED }
	Used to specify the rendering format of images. More...
enum	save_result { save_result::success, save_result::unsupported_format, save_result::save_failed, save_result::no_image }

Functions
surface	getMinimap (int w, int h, const gamemap &map_, const team *vm=nullptr, const std::map< map_location, unsigned int > *reach_map=nullptr, bool ignore_terrain_disabled=false)
	function to create the minimap for a given map the surface returned must be freed by the user More...
void	flush_cache ()
	Purges all image caches. More...
static void	add_localized_overlay (const std::string &ovr_file, surface &orig_surf)
static surface	load_image_file (const image::locator &loc)
static surface	load_image_sub_file (const image::locator &loc)
static surface	load_image_data_uri (const image::locator &loc)
static signed char	col_to_uchar (int i)
light_string	get_light_string (int op, int r, int g, int b)
	Returns the light_string for one light operation. More...
static surface	apply_light (surface surf, const light_string &ls)
surface	load_from_disk (const locator &loc)
void	set_color_adjustment (int r, int g, int b)
	Changes Time of Day color tint for all applicable image types. More...
void	set_zoom (unsigned int zoom)
	Sets the scaling factor for images. More...
static surface	get_hexed (const locator &i_locator)
static surface	get_scaled_to_hex (const locator &i_locator)
static surface	get_tod_colored (const locator &i_locator)
static surface	get_scaled_to_zoom (const locator &i_locator)
static surface	get_brightened (const locator &i_locator)
static TYPE	simplify_type (const image::locator &i_locator, TYPE type)
	translate type to a simpler one when possible More...
surface	get_image (const locator &i_locator, TYPE type=UNSCALED)
	Caches and returns an image. More...
surface	get_lighted_image (const image::locator &i_locator, const light_string &ls, TYPE type)
	Caches and returns an image with a lightmap applied to it. More...
surface	get_hexmask ()
	Retrieves the standard hexagonal tile mask. More...
bool	is_in_hex (const locator &i_locator)
	Checks if an image fits into a single hex. More...
bool	is_empty_hex (const locator &i_locator)
	Checks if an image is empty after hex masking. More...
surface	reverse_image (const surface &surf)
	Horizontally flips an image. More...
bool	exists (const locator &i_locator)
	Returns true if the given image actually exists, without loading it. More...
static void	precache_file_existence_internal (const std::string &dir, const std::string &subdir)
void	precache_file_existence (const std::string &subdir="")
	Precache the existence of files in a binary path subdirectory (e.g. More...
bool	precached_file_exists (const std::string &file)
save_result	save_image (const locator &i_locator, const std::string &filename)
save_result	save_image (const surface &surf, const std::string &filename)

Variables
mini_terrain_cache_map	mini_terrain_cache
mini_terrain_cache_map	mini_fogged_terrain_cache
mini_terrain_cache_map	mini_highlighted_terrain_cache
static int	last_index_ = 0

Detailed Description

Functions to load and save images from/to disk.

image::get_image() and other loading functions implement a pseudo-functional syntax to apply transformations to image files by including them as a suffix to the path (Image Path Functions). They also offer the option to choose between different rendering formats for a single image path according to the display intent – unscaled, masked to hex, rescaled to zoom, etc.

surface surf = image::get_image("units/elves-wood/shyde.png~TC(4,magenta)~FL()",
                                image::UNSCALED);

Internally, all loading functions utilize a cache to avoid reading individual images from disk more than once, or wasting valuable CPU time applying potentially expensive transforms every time (e.g. team colors on animated units). The cache can be manually invalidated using image::flush_cache(). Certain functions will invalidate parts of the cache as needed when relevant configuration parameters change in a way that would be expected to alter the output (e.g. Time of Day-tinted images).

Typedef Documentation

bool_cache

typedef cache_type<bool> image::bool_cache

Definition at line 156 of file picture.hpp.

image_cache

typedef cache_type<surface> image::image_cache

Definition at line 155 of file picture.hpp.

light_string

typedef std::basic_string<signed char> image::light_string

Type used to store color information of central and adjacent hexes.

The structure is one or several 4-char blocks: [L,R,G,B] The R, G, B values represent the color, and L the lightmap to use:

-1: none 0: full hex 1-6: concave corners 7-12: convex half-corners 1 13-19: convex half-corners 2

Definition at line 176 of file picture.hpp.

lit_cache

typedef cache_type<lit_variants> image::lit_cache

Lit variants for each locator.

Definition at line 182 of file picture.hpp.

lit_variants

typedef std::map<light_string, surface> image::lit_variants

Type used to pair light possibilities with the corresponding lit surface.

Definition at line 179 of file picture.hpp.

mini_terrain_cache_map

typedef std::map<t_translation::terrain_code, surface> image::mini_terrain_cache_map

Definition at line 158 of file picture.hpp.

Enumeration Type Documentation

save_result

enum image::save_result

strong

Enumerator
success
unsupported_format
save_failed
no_image

Definition at line 300 of file picture.hpp.

TYPE

enum image::TYPE

Used to specify the rendering format of images.

Enumerator
UNSCALED	Unmodified original-size image.
SCALED_TO_ZOOM	Image rescaled according to the zoom settings.
HEXED	Standard hexagonal tile mask applied, removing portions that don't fit.
SCALED_TO_HEX	Image rescaled to fit into a hexagonal tile according to the zoom settings.
TOD_COLORED	Same as SCALED_TO_HEX, but with Time of Day color tint applied.
BRIGHTENED	Same as TOD_COLORED, but also brightened.

Definition at line 229 of file picture.hpp.

Function Documentation

add_localized_overlay()

static void image::add_localized_overlay ( const std::string &  ovr_file, surface &  orig_surf  )

static

Definition at line 445 of file picture.cpp.

References filesystem::make_read_RWops(), and sdl_blit().

Referenced by load_image_file().

apply_light()

static surface image::apply_light ( surface  surf, const light_string &  ls  )

static

Definition at line 619 of file picture.cpp.

References adjust_surface_color(), c, surface::clone(), get_lighted_image(), HEXED, i, light_surface(), p, and sdl_blit().

Referenced by get_lighted_image().

col_to_uchar()

static signed char image::col_to_uchar ( int  i )

static

Definition at line 602 of file picture.cpp.

Referenced by get_light_string().

exists()

bool image::exists

(

const image::locator &

i_locator

)

Returns true if the given image actually exists, without loading it.

Definition at line 1025 of file picture.cpp.

References gui2::cache, filesystem::get_binary_file_location(), image::locator::get_filename(), image::locator::get_type(), image::locator::is_data_uri(), and success.

Referenced by wesnothd::server::authenticate(), persist_file_context::clear_var(), filesystem::create_directory_if_missing(), filesystem::create_directory_if_missing_recursive(), addon_info::display_icon(), gui2::dialogs::game_load::display_savegame_internal(), filesystem::file_exists(), display::fill_images_list(), filesystem::find_other_version_saves_dirs(), filesystem::get_exe_dir(), display::get_fog_shroud_images(), filesystem::get_version_path_suffix(), image_exists(), gui2::dialogs::addon_manager::publish_addon(), and tmp_file::~tmp_file().

flush_cache()

void image::flush_cache

(

)

Purges all image caches.

Definition at line 223 of file picture.cpp.

Referenced by game_launcher::change_language(), events::console_handler::do_refresh(), game_config_manager::load_game_config_for_game(), editor::editor_controller::refresh_image_cache(), game_config_manager::reload_changed_game_config(), and image::manager::~manager().

get_brightened()

static surface image::get_brightened ( const locator &  i_locator )

static

Definition at line 782 of file picture.cpp.

References brighten_image(), floating_to_fixed_point(), get_image(), game_config::hex_brightening, and TOD_COLORED.

Referenced by get_image().

get_hexed()

static surface image::get_hexed ( const locator &  i_locator )

static

Definition at line 739 of file picture.cpp.

References image::locator::add_to_cache(), image::locator::get_filename(), get_hexmask(), get_image(), mask_surface(), and UNSCALED.

Referenced by get_image().

get_hexmask()

surface image::get_hexmask

(

)

Retrieves the standard hexagonal tile mask.

Definition at line 955 of file picture.cpp.

References get_image(), game_config::images::terrain_mask, and UNSCALED.

Referenced by get_hexed(), is_empty_hex(), is_in_hex(), load_image_sub_file(), and editor::mouse_action::set_terrain_mouse_overlay().

get_image()

surface image::get_image	(	const locator &	i_locator,
		TYPE	type = UNSCALED
	)

Caches and returns an image.

Parameters

i_locator	Image path.
type	Rendering format.

Definition at line 830 of file picture.cpp.

References image::locator::add_to_cache(), BRIGHTENED, get_brightened(), get_hexed(), get_scaled_to_hex(), get_scaled_to_zoom(), get_tod_colored(), HEXED, image::locator::in_cache(), image::locator::is_void(), load_from_disk(), image::locator::locate_in_cache(), SCALED_TO_HEX, SCALED_TO_ZOOM, simplify_type(), TOD_COLORED, and UNSCALED.

Referenced by help::help_text_area::add_img_item(), draw_background(), unit_drawer::draw_bar(), gui::scrollbar::draw_contents(), editor::editor_display::draw_hex(), wb::attack::draw_hex(), wb::suppose_dead::draw_hex(), arrow::draw_hex(), game_display::draw_hex(), display::draw_hex(), editor::item_palette::draw_item(), editor::unit_palette::draw_item(), editor::terrain_palette::draw_item(), draw_label(), game_display::draw_movement_info(), draw_panel(), gui::menu::draw_row(), footsteps_images(), get_brightened(), display::get_flag(), display::get_fog_shroud_images(), get_hexed(), get_hexmask(), gui::menu::style::get_item_image(), get_lighted_image(), unit_frame::get_overlaped_hex(), get_scaled_to_hex(), get_scaled_to_zoom(), display::get_terrain_images(), get_tod_colored(), getMinimap(), help::image_width(), game_launcher::init_video(), intf_get_image_size(), is_empty_hex(), is_in_hex(), gui::menu::imgsel_style::load_image(), load_image_file(), load_image_sub_file(), gui::button::load_images(), game_display::new_turn(), unit_frame::redraw(), unit_drawer::redraw_unit(), display::refresh_report(), halo::halo_impl::effect::render(), save_image(), gui::scrollbar::scrollbar(), editor::mouse_action_item::set_item_mouse_overlay(), editor::mouse_action_village::set_mouse_overlay(), editor::mouse_action_map_label::set_mouse_overlay(), editor::mouse_action_select::set_mouse_overlay(), editor::mouse_action_paste::set_mouse_overlay(), editor::mouse_action_starting_position::set_mouse_overlay(), editor::mouse_action::set_terrain_mouse_overlay(), editor::mouse_action_unit::set_unit_mouse_overlay(), and gui::tristate_button::tristate_button().

get_light_string()

light_string image::get_light_string	(	int	op,
		int	r,
		int	g,
		int	b
	)

Returns the light_string for one light operation.

See light_string for more information.

Definition at line 607 of file picture.cpp.

References col_to_uchar().

Referenced by display::draw_hex(), and display::get_terrain_images().

get_lighted_image()

surface image::get_lighted_image	(	const image::locator &	i_locator,
		const light_string &	ls,
		TYPE	type
	)

Caches and returns an image with a lightmap applied to it.

Parameters

i_locator	Image path.
ls	Light map to apply to the image.
type	This should be either HEXED or SCALED_TO_HEX.

Definition at line 903 of file picture.cpp.

References image::locator::access_in_cache(), image::locator::add_to_cache(), apply_light(), get_image(), HEXED, image::locator::in_cache(), image::locator::is_void(), image::locator::locate_in_cache(), scale_surface_nn(), SCALED_TO_HEX, and game_config::tile_size.

Referenced by apply_light(), display::draw_hex(), and display::get_terrain_images().

get_scaled_to_hex()

static surface image::get_scaled_to_hex ( const locator &  i_locator )

static

Definition at line 749 of file picture.cpp.

References get_image(), HEXED, and scale_surface_nn().

Referenced by get_image().

get_scaled_to_zoom()

static surface image::get_scaled_to_zoom ( const locator &  i_locator )

static

Definition at line 768 of file picture.cpp.

References get_image(), scale_surface_nn(), game_config::tile_size, and UNSCALED.

Referenced by get_image().

get_tod_colored()

static surface image::get_tod_colored ( const locator &  i_locator )

static

Definition at line 762 of file picture.cpp.

References adjust_surface_color(), get_image(), and SCALED_TO_HEX.

Referenced by get_image().

getMinimap()

surface image::getMinimap	(	int	w,
		int	h,
		const gamemap &	map,
		const team *	vw,
		const std::map< map_location, unsigned int > *	reach_map,
		bool	ignore_terrain_disabled
	)

function to create the minimap for a given map the surface returned must be freed by the user

Definition at line 40 of file minimap.cpp.

References adjust_surface_color(), preferences::allied_color(), color_t::b, gui2::cache, game_config::color_info(), DBG_DP, preferences::enemy_color(), sdl::fill_surface_rect(), team::fogged(), color_t::g, resources::gameboard, get_image(), team::get_minimap_color(), display::get_singleton(), terrain_type_data::get_terrain_info(), gamemap_base::h(), HEXED, i, terrain_type::id(), display::is_blindfolded(), terrain_type::is_combined(), team::is_enemy(), is_odd(), terrain_type::is_village(), mini_fogged_terrain_cache, mini_highlighted_terrain_cache, mini_terrain_cache, preferences::minimap_draw_terrain(), preferences::minimap_draw_villages(), terrain_type::minimap_image(), terrain_type::minimap_image_overlay(), preferences::minimap_movement_coding(), preferences::minimap_terrain_coding(), gamemap_base::on_board_with_border(), team::owns_village(), color_t::r, color_range::rep(), xbrz::scale(), scale_surface_sharp(), sdl_blit(), team::shrouded(), gamemap::tdata(), game_config::team_rgb_range, gamemap_base::total_height(), gamemap_base::total_width(), terrain_type_data::underlying_union_terrain(), preferences::unmoved_color(), display_context::village_owner(), t_translation::VOID_TERRAIN, and gamemap_base::w().

Referenced by display::draw_minimap(), and gui2::minimap::get_image().

is_empty_hex()

bool image::is_empty_hex

(

const locator &

i_locator

)

Checks if an image is empty after hex masking.

This should be only used on terrain images, and it will automatically cache the hex-masked version if necessary.

Definition at line 984 of file picture.cpp.

References image::locator::add_to_cache(), get_hexmask(), get_image(), HEXED, image::locator::in_cache(), image::locator::locate_in_cache(), and mask_surface().

Referenced by terrain_builder::tile::rebuild_cache().

is_in_hex()

bool image::is_in_hex

(

const locator &

i_locator

)

Checks if an image fits into a single hex.

Definition at line 961 of file picture.cpp.

References image::locator::add_to_cache(), get_hexmask(), get_image(), image::locator::in_cache(), in_mask_surface(), image::locator::locate_in_cache(), and UNSCALED.

Referenced by unit_frame::get_overlaped_hex().

load_from_disk()

surface image::load_from_disk

(

const locator &

loc

)

Definition at line 680 of file picture.cpp.

References image::locator::FILE, image::locator::get_type(), image::locator::is_data_uri(), load_image_data_uri(), load_image_file(), load_image_sub_file(), and image::locator::SUB_FILE.

Referenced by get_image().

load_image_data_uri()

static surface image::load_image_data_uri ( const image::locator &  loc )

static

Definition at line 571 of file picture.cpp.

References base64::decode(), ERR_DP, and image::locator::get_filename().

Referenced by load_from_disk().

load_image_file()

static surface image::load_image_file ( const image::locator &  loc )

static

Definition at line 458 of file picture.cpp.

References add_localized_overlay(), game_config::debug, filesystem::ends_with(), ERR_DP, filesystem::get_binary_file_location(), image::locator::get_filename(), get_image(), filesystem::get_localized_path(), filesystem::make_read_RWops(), game_config::images::missing, UNSCALED, and WRN_DP.

Referenced by load_from_disk().

load_image_sub_file()

static surface image::load_image_sub_file ( const image::locator &  loc )

static

Definition at line 507 of file picture.cpp.

References image::locator::add_to_cache(), sdl::create_rect(), cut_surface(), image::modification::decode(), e, image::modification_queue::empty(), ERR_CFG, image::locator::get_center_x(), image::locator::get_center_y(), image::locator::get_filename(), get_hexmask(), get_image(), image::locator::get_loc(), image::locator::get_modifications(), mask_surface(), image::modification::imod_exception::message, utils::parenthetical_split(), image::modification_queue::pop(), game_config::tile_size, image::modification_queue::top(), UNSCALED, map_location::valid(), map_location::x, and map_location::y.

Referenced by load_from_disk().

precache_file_existence()

void image::precache_file_existence

(

const std::string &

subdir = ""

)

Precache the existence of files in a binary path subdirectory (e.g.

"terrain/").

Definition at line 1076 of file picture.cpp.

References filesystem::get_binary_paths(), p, and precache_file_existence_internal().

Referenced by terrain_builder::terrain_builder().

precache_file_existence_internal()

static void image::precache_file_existence_internal ( const std::string &  dir, const std::string &  subdir  )

static

Definition at line 1049 of file picture.cpp.

References d, filesystem::DONT_REORDER, f, filesystem::FILE_NAME_ONLY, filesystem::get_files_in_dir(), filesystem::is_directory(), and filesystem::NO_FILTER.

Referenced by precache_file_existence().

precached_file_exists()

bool image::precached_file_exists

(

const std::string &

file

)

Definition at line 1085 of file picture.cpp.

References b.

Referenced by image_exists().

reverse_image()

surface image::reverse_image

(

const surface &

surf

)

Horizontally flips an image.

The input MUST have originally been returned from an image namespace function. Returned images have the same semantics as those obtained from get_image().

Definition at line 1003 of file picture.cpp.

References flip_surface().

Referenced by halo::halo_impl::effect::render(), and display::render_image().

save_image() [1/2]

save_result image::save_image	(	const locator &	i_locator,
		const std::string &	filename
	)

Definition at line 1095 of file picture.cpp.

References get_image().

Referenced by editor::editor_controller::do_screenshot(), game_launcher::play_render_image_mode(), and gui2::dialogs::screenshot_notification::save_screenshot().

save_image() [2/2]

save_result image::save_image	(	const surface &	surf,
		const std::string &	filename
	)

Definition at line 1100 of file picture.cpp.

References filesystem::ends_with(), lg::err(), LOG_DP, filesystem::make_write_RWops(), no_image, save_failed, success, and unsupported_format.

set_color_adjustment()

void image::set_color_adjustment	(	int	r,
		int	g,
		int	b
	)

Changes Time of Day color tint for all applicable image types.

In particular this affects TOD_COLORED and BRIGHTENED images, as well as images with lightmaps applied. Changing the previous values automatically invalidates all cached images of those types. It also invalidates the internal cache used by reverse_image() (FIXME?).

Definition at line 705 of file picture.cpp.

References b, and g.

Referenced by display::update_tod().

set_zoom()

void image::set_zoom

(

unsigned int

zoom

)

Sets the scaling factor for images.

Changing the previous value automatically invalidates all cached scaled images.

Definition at line 719 of file picture.cpp.

References game_config::tile_size.

Referenced by display::bounds_check_position(), display::display(), display::get_builder(), and display::set_zoom().

simplify_type()

static TYPE image::simplify_type ( const image::locator &  i_locator, TYPE  type  )

static

translate type to a simpler one when possible

Definition at line 789 of file picture.cpp.

References BRIGHTENED, image::locator::get_loc(), game_config::hex_brightening, HEXED, SCALED_TO_HEX, SCALED_TO_ZOOM, game_config::tile_size, TOD_COLORED, UNSCALED, and map_location::valid().

Referenced by get_image().

Variable Documentation

last_index_

int image::last_index_ = 0

static

Definition at line 221 of file picture.cpp.

mini_fogged_terrain_cache

mini_terrain_cache_map image::mini_fogged_terrain_cache

Definition at line 218 of file picture.cpp.

Referenced by getMinimap().

mini_highlighted_terrain_cache

mini_terrain_cache_map image::mini_highlighted_terrain_cache

Definition at line 219 of file picture.cpp.

Referenced by getMinimap().

mini_terrain_cache

mini_terrain_cache_map image::mini_terrain_cache

Definition at line 217 of file picture.cpp.

Referenced by getMinimap().