utils.cpp File Reference

Support-routines for the SDL-graphics-library. More...

#include "global.hpp"
#include "color_range.hpp"
#include "sdl/utils.hpp"
#include "sdl/alpha.hpp"
#include "sdl/rect.hpp"
#include "floating_point_emulation.hpp"
#include "neon.hpp"
#include "video.hpp"
#include "xBRZ/xbrz.hpp"
#include <algorithm>
#include <cassert>
#include <cstring>
#include <iostream>
#include <boost/math/constants/constants.hpp>

Include dependency graph for utils.cpp:

Go to the source code of this file.

Functions
SDL_Color	int_to_color (const Uint32 rgb)
SDL_Color	string_to_color (const std::string &color_string)
	Return the color the string represents. More...
SDL_Color	create_color (const unsigned char red, unsigned char green, unsigned char blue, unsigned char alpha)
SDLKey	sdl_keysym_from_name (std::string const &keyname)
bool	operator< (const surface &a, const surface &b)
bool	is_neutral (const surface &surf)
	Check that the surface is neutral bpp 32. More...
static SDL_PixelFormat &	get_neutral_pixel_format ()
surface	make_neutral_surface (const surface &surf)
surface	create_neutral_surface (int w, int h)
surface	create_optimized_surface (const surface &surf)
surface	stretch_surface_horizontal (const surface &surf, const unsigned w, const bool optimize)
	Stretches a surface in the horizontal direction. More...
surface	stretch_surface_vertical (const surface &surf, const unsigned h, const bool optimize)
	Stretches a surface in the vertical direction. More...
Uint32	blend_rgba (const surface &surf, unsigned char r, unsigned char g, unsigned char b, unsigned char a, unsigned char drop)
	This method blends a RGBA color. More...
surface	scale_surface_xbrz (const surface &surf, size_t z)
	Scale a surface using xBRZ algorithm. More...
surface	scale_surface_nn (const surface &surf, int w, int h)
	Scale a surface using the nearest neighbor algorithm (provided by xBRZ lib) More...
surface	scale_surface (const surface &surf, int w, int h)
surface	scale_surface (const surface &surf, int w, int h, bool optimize)
	Scale a surface. More...
surface	scale_surface_sharp (const surface &surf, int w, int h, bool optimize)
	Scale a surface using modified nearest neighbour algorithm. More...
surface	tile_surface (const surface &surf, int w, int h, bool optimize)
	Tile a surface. More...
surface	adjust_surface_color (const surface &surf, int red, int green, int blue, bool optimize)
surface	greyscale_image (const surface &surf, bool optimize)
surface	monochrome_image (const surface &surf, const int threshold, bool optimize)
surface	sepia_image (const surface &surf, bool optimize)
surface	negative_image (const surface &surf, const int thresholdR, const int thresholdG, const int thresholdB, bool optimize)
surface	alpha_to_greyscale (const surface &surf, bool optimize)
surface	wipe_alpha (const surface &surf, bool optimize)
surface	shadow_image (const surface &surf, bool optimize)
	create an heavy shadow of the image, by blurring, increasing alpha and darkening More...
surface	swap_channels_image (const surface &surf, channel r, channel g, channel b, channel a, bool optimize)
surface	recolor_image (surface surf, const std::map< Uint32, Uint32 > &map_rgb, bool optimize)
	Recolors a surface using a map with source and converted palette values. More...
surface	brighten_image (const surface &surf, fixed_t amount, bool optimize)
surface	adjust_surface_alpha (const surface &surf, fixed_t amount, bool optimize)
surface	adjust_surface_alpha_add (const surface &surf, int amount, bool optimize)
surface	mask_surface (const surface &surf, const surface &mask, bool *empty_result, const std::string &filename)
	Applies a mask on a surface. More...
bool	in_mask_surface (const surface &surf, const surface &mask)
	Check if a surface fit into a mask. More...
surface	submerge_alpha (const surface &surf, int depth, float alpha_base, float alpha_delta, bool optimize)
	Progressively reduce alpha of bottom part of the surface. More...
surface	light_surface (const surface &surf, const surface &lightmap, bool optimize)
	Light surf using lightmap. More...
surface	blur_surface (const surface &surf, int depth, bool optimize)
	Cross-fades a surface. More...
void	blur_surface (surface &surf, SDL_Rect rect, int depth)
	Cross-fades a surface in place. More...
surface	blur_alpha_surface (const surface &surf, int depth, bool optimize)
	Cross-fades a surface with alpha channel. More...
surface	cut_surface (const surface &surf, SDL_Rect const &r)
	Cuts a rectangle from a surface. More...
surface	blend_surface (const surface &surf, const double amount, const Uint32 color, const bool optimize)
	Blends a surface with a color. More...
surface	rotate_any_surface (const surface &surf, float angle, int zoom, int offset, bool optimize)
	Rotates a surface by any degrees. More...
void	put_pixel (const surface &surf, surface_lock &surf_lock, int x, int y, Uint32 pixel)
	Helper methods for setting/getting a single pixel in an image. More...
Uint32	get_pixel (const surface &surf, const const_surface_lock &surf_lock, int x, int y)
surface	rotate_180_surface (const surface &surf, bool optimize)
	Rotates a surface 180 degrees. More...
surface	rotate_90_surface (const surface &surf, bool clockwise, bool optimize)
	Rotates a surface 90 degrees. More...
surface	flip_surface (const surface &surf, bool optimize)
surface	flop_surface (const surface &surf, bool optimize)
surface	create_compatible_surface (const surface &surf, int width, int height)
void	blit_surface (const surface &surf, const SDL_Rect *srcrect, surface &dst, const SDL_Rect *dstrect)
	Replacement for sdl_blit. More...
surface	get_surface_portion (const surface &src, SDL_Rect &area)
	Get a portion of the screen. More...
SDL_Rect	get_non_transparent_portion (const surface &surf)
bool	operator== (const SDL_Color &a, const SDL_Color &b)
bool	operator!= (const SDL_Color &a, const SDL_Color &b)
SDL_Color	inverse (const SDL_Color &color)
void	draw_centered_on_background (surface surf, const SDL_Rect &rect, const SDL_Color &color, surface target)
std::ostream &	operator<< (std::ostream &s, const SDL_Rect &rect)

Detailed Description

Support-routines for the SDL-graphics-library.

Definition in file utils.cpp.

Function Documentation

surface adjust_surface_alpha	(	const surface &	surf,
		fixed_t	amount,
		bool	optimize
	)

Definition at line 1202 of file utils.cpp.

References create_optimized_surface(), fxpmult, g, make_neutral_surface(), and surface_lock::pixels().

Referenced by font::floating_label::create_surface(), gui::textbox::draw_contents(), game_display::new_turn(), image::adjust_alpha_modification::operator()(), image::o_modification::operator()(), display::render_image(), editor::mouse_action_item::set_item_mouse_overlay(), editor::mouse_action_map_label::set_mouse_overlay(), editor::mouse_action_village::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(), and editor::mouse_action_unit::set_unit_mouse_overlay().

surface adjust_surface_alpha_add	(	const surface &	surf,
		int	amount,
		bool	optimize
	)

Definition at line 1241 of file utils.cpp.

References create_optimized_surface(), g, make_neutral_surface(), and surface_lock::pixels().

Referenced by font::floating_label::undraw().

surface adjust_surface_color	(	const surface &	surf,
		int	red,
		int	green,
		int	blue,
		bool	optimize
	)

Definition at line 718 of file utils.cpp.

References create_optimized_surface(), g, int(), make_neutral_surface(), surface_lock::pixels(), and surf.

Referenced by image::apply_light(), image::get_tod_colored(), image::getMinimap(), and image::cs_modification::operator()().

surface alpha_to_greyscale	(	const surface &	surf,
		bool	optimize
	)

Definition at line 931 of file utils.cpp.

References create_optimized_surface(), make_neutral_surface(), and surface_lock::pixels().

Referenced by image::plot_alpha_modification::operator()().

Uint32 blend_rgba	(	const surface &	surf,
		unsigned char	r,
		unsigned char	g,
		unsigned char	b,
		unsigned char	a,
		unsigned char	drop
	)

This method blends a RGBA color.

The method takes as input a surface, the RGB color to blend and a value specifying how much blending to apply. The blended color is returned. Caution: if you use a transparent color, make sure the resulting color is not equal to the transparent color.

Definition at line 356 of file utils.cpp.

Referenced by battle_prediction_pane::get_hp_distrib_surface().

surface blend_surface	(	const surface &	surf,
		const double	amount,
		const Uint32	color,
		const bool	optimize = true
	)

Blends a surface with a color.

Every pixel in the surface will be blended with the color given. The final color of a pixel is amount * color + (1 - amount) * original.

Parameters

surf	The surface to blend.
amount	The amount of the new color is determined by color. Must be a number in the range [0, 1].
color	The color to blend width, note its alpha channel is ignored.
optimize	Should the return surface be RLE optimized.

Returns

The blended surface.

Definition at line 1840 of file utils.cpp.

References create_optimized_surface(), i, make_neutral_surface(), surface_lock::pixels(), vaddq_u16(), tmatrix< T, S, D >::val, vdup_n_u8(), vdupq_n_u16(), vld4_u8(), vmull_u8(), vshrn_n_u16(), and vst4_u8().

Referenced by blend_image(), image::blend_modification::operator()(), and display::render_image().

void blit_surface	(	const surface &	src,
		const SDL_Rect *	srcrect,
		surface &	dst,
		const SDL_Rect *	dstrect
	)

Replacement for sdl_blit.

sdl_blit has problems with blitting partly transparent surfaces so this is a replacement. It ignores the SDL_SRCALPHA and SDL_SRCCOLORKEY flags. src and dst will have the SDL_RLEACCEL flag removed. The return value of SDL_BlistSurface is normally ignored so no return value. The rectangles are const and will not be modified.

Precondition

src contains a valid canvas.

dst contains a valid neutral canvas.

The caller must make sure the src fits on the dst.

Parameters

src	The surface to blit.
srcrect	The region of the surface to blit
dst	The surface to blit on.
dstrect	The offset to blit the surface on, only x and y are used.

Definition at line 2185 of file utils.cpp.

References sdl::create_rect(), is_neutral(), make_neutral_surface(), surface_lock::pixels(), and const_surface_lock::pixels().

Referenced by image::apply_light(), font::floating_label::create_surface(), gui::button::draw_contents(), gui::tristate_button::draw_contents(), draw_panel(), gui::multimenu::draw_row(), image::getMinimap(), image::blit_modification::operator()(), image::mask_modification::operator()(), image::brighten_modification::operator()(), image::darken_modification::operator()(), image::background_modification::operator()(), storyscreen::part_ui::prepare_background(), editor::mouse_action_map_label::set_mouse_overlay(), editor::mouse_action_village::set_mouse_overlay(), editor::mouse_action_paste::set_mouse_overlay(), editor::mouse_action_starting_position::set_mouse_overlay(), and editor::mouse_action::set_terrain_mouse_overlay().

surface blur_alpha_surface	(	const surface &	surf,
		int	depth = 1,
		bool	optimize = true
	)

Cross-fades a surface with alpha channel.

Todo:

FIXME: This is just an adapted copy-paste of the normal blur but with blur alpha channel too

Definition at line 1659 of file utils.cpp.

References create_optimized_surface(), make_neutral_surface(), and surface_lock::pixels().

Referenced by image::bl_modification::operator()(), and shadow_image().

surface blur_surface	(	const surface &	surf,
		int	depth = 1,
		bool	optimize = true
	)

Cross-fades a surface.

Definition at line 1524 of file utils.cpp.

References blur_surface(), create_optimized_surface(), sdl::create_rect(), and make_neutral_surface().

Referenced by gui2::tcanvas::blit(), blur_surface(), and gui::dialog_frame::draw_background().

void blur_surface	(	surface &	surf,
		SDL_Rect	rect,
		int	depth = 1
	)

Cross-fades a surface in place.

Parameters

surf	The surface to blur, must be not optimized and have 32 bits per pixel.
rect	The part of the surface to blur.
depth	The depth of the blurring.

Definition at line 1543 of file utils.cpp.

References surface_lock::pixels().

surface brighten_image	(	const surface &	surf,
		fixed_t	amount,
		bool	optimize
	)

Definition at line 1160 of file utils.cpp.

References create_optimized_surface(), fxpmult, g, make_neutral_surface(), and surface_lock::pixels().

Referenced by image::get_brightened(), and display::render_image().

SDL_Color create_color	(	const unsigned char	red,
		unsigned char	green,
		unsigned char	blue,
		unsigned char	alpha
	)

Definition at line 89 of file utils.cpp.

Referenced by image::getMinimap(), game_lua_kernel::intf_print(), the_end(), and unit_moves().

surface create_compatible_surface	(	const surface &	surf,
		int	width,
		int	height
	)

Definition at line 2166 of file utils.cpp.

Referenced by gui::textbox::append_text(), cut_surface(), font::floating_label::draw(), unit_drawer::draw_bar(), sdl::fill_rect_alpha(), get_surface_portion(), main(), font::render_text(), display::screenshot(), and about::show_about().

surface create_neutral_surface	(	int	w,
		int	h
	)

Definition at line 150 of file utils.cpp.

References get_neutral_pixel_format().

Referenced by font::floating_label::create_surface(), gui2::tcanvas::draw(), display::draw_hex(), battle_prediction_pane::get_hp_distrib_surface(), image::getMinimap(), image::mask_modification::operator()(), storyscreen::part_ui::prepare_background(), rotate_90_surface(), rotate_any_surface(), scale_surface(), scale_surface_nn(), scale_surface_sharp(), scale_surface_xbrz(), editor::mouse_action_map_label::set_mouse_overlay(), editor::mouse_action_village::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(), stretch_surface_horizontal(), stretch_surface_vertical(), and tile_surface().

surface create_optimized_surface

(

const surface &

surf

)

Definition at line 168 of file utils.cpp.

References SDL_SetAlpha(), SDL_SRCALPHA, and surf.

Referenced by adjust_surface_alpha(), adjust_surface_alpha_add(), adjust_surface_color(), alpha_to_greyscale(), blend_surface(), blur_alpha_surface(), blur_surface(), brighten_image(), font::floating_label::create_surface(), flip_surface(), flop_surface(), image::get_image(), image::get_lighted_image(), greyscale_image(), light_surface(), monochrome_image(), negative_image(), image::crop_modification::operator()(), recolor_image(), rotate_180_surface(), rotate_90_surface(), rotate_any_surface(), scale_surface(), scale_surface_nn(), scale_surface_sharp(), scale_surface_xbrz(), sepia_image(), shadow_image(), stretch_surface_horizontal(), stretch_surface_vertical(), submerge_alpha(), swap_channels_image(), tile_surface(), and wipe_alpha().

surface cut_surface	(	const surface &	surf,
		SDL_Rect const &	r
	)

Cuts a rectangle from a surface.

Definition at line 1782 of file utils.cpp.

References create_compatible_surface(), surface_lock::pixels(), and const_surface_lock::pixels().

Referenced by image::load_image_sub_file(), and image::crop_modification::operator()().

void draw_centered_on_background	(	surface	surf,
		const SDL_Rect &	rect,
		const SDL_Color &	color,
		surface	target
	)

Definition at line 2518 of file utils.cpp.

References sdl::fill_rect(), sdl_blit(), and update_rect().

Referenced by mp::create::draw_level_image(), and display::draw_minimap().

surface flip_surface	(	const surface &	surf,
		bool	optimize
	)

Definition at line 2108 of file utils.cpp.

References create_optimized_surface(), make_neutral_surface(), surface_lock::pixels(), and swap().

Referenced by image::fl_modification::operator()(), and image::reverse_image().

surface flop_surface	(	const surface &	surf,
		bool	optimize
	)

Definition at line 2137 of file utils.cpp.

References create_optimized_surface(), make_neutral_surface(), surface_lock::pixels(), and swap().

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

static SDL_PixelFormat& get_neutral_pixel_format ( )

static

Definition at line 120 of file utils.cpp.

References surf.

Referenced by create_neutral_surface(), and make_neutral_surface().

SDL_Rect get_non_transparent_portion

(

const surface &

surf

)

Definition at line 2381 of file utils.cpp.

References make_neutral_surface(), and surface_lock::pixels().

Referenced by display::draw_image_for_report().

Uint32 get_pixel	(	const surface &	surf,
		const const_surface_lock &	surf_lock,
		int	x,
		int	y
	)

Definition at line 2006 of file utils.cpp.

References const_surface_lock::pixels().

Referenced by rotate_any_surface().

surface get_surface_portion	(	const surface &	surf,
		SDL_Rect &	rect
	)

Get a portion of the screen.

Send nullptr if the portion is outside of the screen.

Parameters

surf	The source surface.
rect	The portion of the source surface to copy.

Returns

A surface containing the portion of the source. No RLE or Alpha bits are set.

Return values

0	if error or the portion is outside of the surface.

Definition at line 2335 of file utils.cpp.

References create_compatible_surface(), and sdl_copy_portion().

Referenced by gui2::tcanvas::blit(), gui2::twindow::draw(), gui::dialog_frame::draw_background(), display::draw_image_for_report(), display::refresh_report(), halo::halo_impl::effect::render(), and surface_restorer::update().

surface greyscale_image	(	const surface &	surf,
		bool	optimize
	)

Definition at line 761 of file utils.cpp.

References create_optimized_surface(), g, make_neutral_surface(), and surface_lock::pixels().

Referenced by image::gs_modification::operator()(), and display::render_image().

bool in_mask_surface	(	const surface &	surf,
		const surface &	mask
	)

Check if a surface fit into a mask.

Definition at line 1349 of file utils.cpp.

References make_neutral_surface(), surface_lock::pixels(), and const_surface_lock::pixels().

Referenced by image::is_in_hex().

SDL_Color int_to_color

(

const Uint32

rgb

)

Definition at line 63 of file utils.cpp.

Referenced by display_chat_manager::add_chat_message(), display::draw_minimap_units(), game_display::draw_movement_info(), team::get_minimap_color(), team::get_side_color(), image::getMinimap(), events::menu_handler::label_terrain(), unit_frame::redraw(), gui2::set_weapon_info(), string_to_color(), unit_defense(), and unit_weapons().

SDL_Color inverse

(

const SDL_Color &

color

)

Definition at line 2458 of file utils.cpp.

References inverse().

Referenced by inverse().

bool is_neutral

(

const surface &

surf

)

Check that the surface is neutral bpp 32.

The surface may have an empty alpha channel.

Parameters

surf	The surface to test.

Returns

The status true if neutral, false if not.

Definition at line 113 of file utils.cpp.

Referenced by gui2::tcanvas::blit(), and blit_surface().

surface light_surface	(	const surface &	surf,
		const surface &	lightmap,
		bool	optimize = true
	)

Light surf using lightmap.

Parameters

surf	The source surface.
lightmap	add/subtract this color to surf but RGB values are converted to (X-128)*2 to cover the full (-256,256) spectrum. Should already be neutral
optimize	Whether the new surface should be RLE encoded.

Definition at line 1458 of file utils.cpp.

References create_optimized_surface(), g, make_neutral_surface(), surface_lock::pixels(), const_surface_lock::pixels(), and surf.

Referenced by image::apply_light(), and image::light_modification::operator()().

surface make_neutral_surface

(

const surface &

surf

)

Definition at line 135 of file utils.cpp.

References get_neutral_pixel_format(), SDL_SetAlpha(), and SDL_SRCALPHA.

Referenced by adjust_surface_alpha(), adjust_surface_alpha_add(), adjust_surface_color(), alpha_to_greyscale(), image::apply_light(), blend_surface(), blit_surface(), blur_alpha_surface(), blur_surface(), brighten_image(), unit_drawer::calculate_energy_bar(), composer::compose(), create_cursor(), gui::button::draw_contents(), gui::tristate_button::draw_contents(), flip_surface(), flop_surface(), get_non_transparent_portion(), image::getMinimap(), greyscale_image(), in_mask_surface(), light_surface(), cutter::load_masks(), main(), mask_surface(), monochrome_image(), negative_image(), image::crop_modification::operator()(), image::blit_modification::operator()(), image::light_modification::operator()(), image::brighten_modification::operator()(), image::darken_modification::operator()(), image::background_modification::operator()(), storyscreen::part_ui::prepare_background(), recolor_image(), rotate_180_surface(), rotate_90_surface(), scale_surface(), scale_surface_nn(), scale_surface_sharp(), scale_surface_xbrz(), display::scroll(), sepia_image(), stretch_surface_horizontal(), stretch_surface_vertical(), submerge_alpha(), swap_channels_image(), tile_surface(), and wipe_alpha().

surface mask_surface	(	const surface &	surf,
		const surface &	mask,
		bool *	empty_result = nullptr,
		const std::string &	filename = std::string()
	)

Applies a mask on a surface.

Definition at line 1279 of file utils.cpp.

References g, make_neutral_surface(), surface_lock::pixels(), const_surface_lock::pixels(), and surf.

Referenced by image::get_hexed(), image::is_empty_hex(), image::load_image_sub_file(), image::mask_modification::operator()(), and editor::mouse_action::set_terrain_mouse_overlay().

surface monochrome_image	(	const surface &	surf,
		const int	threshold,
		bool	optimize
	)

Definition at line 806 of file utils.cpp.

References create_optimized_surface(), g, make_neutral_surface(), and surface_lock::pixels().

Referenced by image::bw_modification::operator()().

surface negative_image	(	const surface &	surf,
		const int	thresholdR,
		const int	thresholdG,
		const int	thresholdB,
		bool	optimize
	)

Definition at line 888 of file utils.cpp.

References create_optimized_surface(), g, make_neutral_surface(), and surface_lock::pixels().

Referenced by image::negative_modification::operator()().

bool operator!=	(	const SDL_Color &	a,
		const SDL_Color &	b
	)

Definition at line 2454 of file utils.cpp.

References operator==().

bool operator<	(	const surface &	a,
		const surface &	b
	)

Definition at line 108 of file utils.cpp.

References surface::get().

std::ostream& operator<<	(	std::ostream &	s,
		const SDL_Rect &	rect
	)

Definition at line 2535 of file utils.cpp.

bool operator==	(	const SDL_Color &	a,
		const SDL_Color &	b
	)

Definition at line 2450 of file utils.cpp.

Referenced by operator!=().

void put_pixel	(	const surface &	surf,
		surface_lock &	surf_lock,
		int	x,
		int	y,
		Uint32	pixel
	)

Helper methods for setting/getting a single pixel in an image.

Lifted from http://sdl.beuc.net/sdl.wiki/Pixel_Access

Parameters

surf	The image to get or receive the pixel from.
surf_lock	The locked surface to make sure the pointers are valid.
x	The position in the row of the pixel.
y	The row of the pixel.

Definition at line 1975 of file utils.cpp.

References surface_lock::pixels().

Referenced by rotate_any_surface().

surface recolor_image	(	surface	surf,
		const std::map< Uint32, Uint32 > &	map_rgb,
		bool	optimize = true
	)

Recolors a surface using a map with source and converted palette values.

This is most often used for team-coloring.

Parameters

surf	The source surface.
map_rgb	Map of color values, with the keys corresponding to the source palette, and the values to the recolored palette.
optimize	Whether the new surface should be RLE encoded. Only useful when the source is not the screen and it is going to be used multiple times.

Returns

A recolored surface, or a null surface if there are problems with the source.

Definition at line 1126 of file utils.cpp.

References create_optimized_surface(), i, make_neutral_surface(), surface_lock::pixels(), and surf.

Referenced by image::rc_modification::operator()().

surface rotate_180_surface	(	const surface &	surf,
		bool	optimize = true
	)

Rotates a surface 180 degrees.

Parameters

surf	The surface to rotate.
optimize	Should the return surface be RLE optimized.

Returns

The rotated surface.

Definition at line 2029 of file utils.cpp.

References create_optimized_surface(), is_odd(), make_neutral_surface(), surface_lock::pixels(), and swap().

Referenced by image::fl_modification::operator()(), and image::rotate_modification::operator()().

surface rotate_90_surface	(	const surface &	surf,
		bool	clockwise,
		bool	optimize = true
	)

Rotates a surface 90 degrees.

Parameters

surf	The surface to rotate.
clockwise	Whether the rotation should be clockwise (true) or counter-clockwise (false).
optimize	Should the return surface be RLE optimized.

Returns

The rotated surface.

Definition at line 2071 of file utils.cpp.

References create_neutral_surface(), create_optimized_surface(), make_neutral_surface(), surface_lock::pixels(), and const_surface_lock::pixels().

Referenced by image::rotate_modification::operator()().

surface rotate_any_surface	(	const surface &	surf,
		float	angle,
		int	zoom,
		int	offset,
		bool	optimize = true
	)

Rotates a surface by any degrees.

Precondition

zoom >= offset Otherwise

Returns

will have empty pixels.

Precondition

offset > 0 Otherwise the procedure will not return.

Parameters

surf	The surface to rotate.
angle	The angle of rotation.
zoom	Which zoom level to use for calculating the result.
offset	Pixel offset when scanning the zoomed source.
optimize	Should the return surface be RLE optimized.

Returns

The rotated surface.

Definition at line 1920 of file utils.cpp.

References create_neutral_surface(), create_optimized_surface(), get_pixel(), put_pixel(), and scale_surface().

Referenced by image::rotate_modification::operator()().

surface scale_surface	(	const surface &	surf,
		int	w,
		int	h
	)

Definition at line 443 of file utils.cpp.

References scale_surface().

Referenced by ng::campaign::create_image_surface(), gui::dialog_frame::draw_border(), gui::tristate_button::draw_contents(), gui::scrollbar::draw_contents(), dialogs::unit_preview_pane::draw_contents(), mp::ui::draw_contents(), display::draw_image_for_report(), editor::item_palette::draw_item(), editor::unit_palette::draw_item(), editor::terrain_palette::draw_item(), draw_label(), gui::menu::imgsel_style::draw_row_bg(), gui::menu::style::get_item_image(), image::get_lighted_image(), storyscreen::floating_image::get_render_input(), gui::button::load_images(), image::light_modification::operator()(), image::scale_modification::operator()(), storyscreen::part_ui::prepare_background(), storyscreen::part_ui::render_story_box_borders(), rotate_any_surface(), scale(), scale_surface(), image::select_algorithm(), editor::mouse_action_item::set_item_mouse_overlay(), editor::mouse_action_map_label::set_mouse_overlay(), editor::mouse_action_village::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 about::show_about().

surface scale_surface	(	const surface &	surf,
		int	w,
		int	h,
		bool	optimize
	)

Scale a surface.

Parameters

surf	The source surface.
w	The width of the resulting surface.
h	The height of the resulting surface.
optimize	Should the return surface be RLE optimized.

Returns

A surface containing the scaled version of the source.

Return values

0	Returned upon error.
surf	Returned if w == surf->w and h == surf->h note this ignores the optimize flag.

Definition at line 447 of file utils.cpp.

References create_neutral_surface(), create_optimized_surface(), e, ftofxp, fxpdiv, fxptoi, h, make_neutral_surface(), surface_lock::pixels(), const_surface_lock::pixels(), and surf.

surface scale_surface_nn	(	const surface &	surf,
		int	w,
		int	h
	)

Scale a surface using the nearest neighbor algorithm (provided by xBRZ lib)

Parameters

surf	The sources surface
w	The width of the resulting surface.
h	The height of the resulting surface.

Returns

The rescaled surface.

Definition at line 404 of file utils.cpp.

References create_neutral_surface(), create_optimized_surface(), h, make_neutral_surface(), xbrz::nearestNeighborScale(), surface_lock::pixels(), const_surface_lock::pixels(), and surf.

Referenced by image::select_algorithm().

surface scale_surface_sharp	(	const surface &	surf,
		int	w,
		int	h,
		bool	optimize = true
	)

Scale a surface using modified nearest neighbour algorithm.

Use only if preserving sharp edges is a priority (e.g. minimap).

Parameters

surf	The source surface.
w	The width of the resulting surface.
h	The height of the resulting surface.
optimize	Should the return surface be RLE optimized.

Returns

A surface containing the scaled version of the source.

Return values

0	Returned upon error.
surf	Returned if w == surf->w and h == surf->h note this ignores the optimize flag.

Definition at line 577 of file utils.cpp.

References create_neutral_surface(), create_optimized_surface(), floating_point_emulation::floor(), g, h, make_neutral_surface(), surface_lock::pixels(), const_surface_lock::pixels(), surf, and floating_point_emulation::tfloat< T, S >::to_int().

Referenced by image::getMinimap(), and image::scale_modification::operator()().

surface scale_surface_xbrz	(	const surface &	surf,
		size_t	z
	)

Scale a surface using xBRZ algorithm.

Parameters

surf	The source surface
z	The scaling factor. Should be an integer 2-5 (1 is tolerated).

Returns

The scaled (optimized) surface

Definition at line 366 of file utils.cpp.

References create_neutral_surface(), create_optimized_surface(), make_neutral_surface(), surface_lock::pixels(), const_surface_lock::pixels(), and xbrz::scale().

Referenced by image::xbrz_modification::operator()(), and image::scale_xbrz_helper().

SDLKey sdl_keysym_from_name

(

std::string const &

keyname

)

Definition at line 103 of file utils.cpp.

surface sepia_image	(	const surface &	surf,
		bool	optimize
	)

Definition at line 846 of file utils.cpp.

References create_optimized_surface(), g, make_neutral_surface(), and surface_lock::pixels().

Referenced by image::sepia_modification::operator()().

surface shadow_image	(	const surface &	surf,
		bool	optimize
	)

create an heavy shadow of the image, by blurring, increasing alpha and darkening

Definition at line 987 of file utils.cpp.

References blur_alpha_surface(), create_optimized_surface(), and surface_lock::pixels().

Referenced by font::floating_label::create_surface().

surface stretch_surface_horizontal	(	const surface &	surf,
		const unsigned	w,
		const bool	optimize = true
	)

Stretches a surface in the horizontal direction.

The stretches a surface it uses the first pixel in the horizontal direction of the original surface and copies that to the destination. This means only the first column of the original is used for the destination.

Parameters

surf	The source surface.
w	The width of the resulting surface.
optimize	Should the return surface be RLE optimized.

Returns

An optimized surface. returned.

Return values

0	Returned upon error.
surf	Returned if w == surf->w, note this ignores the optimize flag.

Definition at line 178 of file utils.cpp.

References create_neutral_surface(), create_optimized_surface(), make_neutral_surface(), surface_lock::pixels(), const_surface_lock::pixels(), and surf.

surface stretch_surface_vertical	(	const surface &	surf,
		const unsigned	h,
		const bool	optimize = true
	)

Stretches a surface in the vertical direction.

The stretches a surface it uses the first pixel in the vertical direction of the original surface and copies that to the destination. This means only the first row of the original is used for the destination.

Parameters

surf	The source surface.
h	The height of the resulting surface.
optimize	Should the return surface be RLE optimized.

Returns

An optimized surface. returned.

Return values

surf	Returned if h == surf->h, note this ignores the optimize flag.

Definition at line 223 of file utils.cpp.

References create_neutral_surface(), create_optimized_surface(), h, make_neutral_surface(), surface_lock::pixels(), const_surface_lock::pixels(), and surf.

SDL_Color string_to_color

(

const std::string &

color_string

)

Return the color the string represents.

Return font::NORMAL_COLOR if the string is empty or can't be matched against any other color.

Definition at line 77 of file utils.cpp.

References font::BAD_COLOR, font::BIGMAP_COLOR, font::BLACK_COLOR, font::GOOD_COLOR, int_to_color(), font::NORMAL_COLOR, string2rgb(), and font::YELLOW_COLOR.

surface submerge_alpha	(	const surface &	surf,
		int	depth,
		float	alpha_base,
		float	alpha_delta,
		bool	optimize = true
	)

Progressively reduce alpha of bottom part of the surface.

Parameters

surf	The source surface.
depth	The height of the bottom part in pixels
alpha_base	The alpha adjustment at the interface
alpha_delta	The alpha adjustment reduction rate by pixel depth
optimize	Optimize by converting to result to display

Definition at line 1395 of file utils.cpp.

References amount, create_optimized_surface(), d, ftofxp, fxpmult, g, make_neutral_surface(), and surface_lock::pixels().

Referenced by display::render_image().

surface swap_channels_image	(	const surface &	surf,
		channel	r,
		channel	g,
		channel	b,
		channel	a,
		bool	optimize
	)

Definition at line 1024 of file utils.cpp.

References ALPHA, BLUE, create_optimized_surface(), GREEN, make_neutral_surface(), surface_lock::pixels(), and RED.

Referenced by image::swap_modification::operator()().

surface tile_surface	(	const surface &	surf,
		int	w,
		int	h,
		bool	optimize = true
	)

Tile a surface.

Parameters

surf	The source surface.
w	The width of the resulting surface.
h	The height of the resulting surface.
optimize	Should the return surface be RLE optimized

Returns

A surface containing the tiled version of the source.

Return values

0	Returned upon error
surf	Returned if w == surf->w and h == surf->h note this ignores the optimize flag.

Definition at line 674 of file utils.cpp.

References create_neutral_surface(), create_optimized_surface(), h, i, make_neutral_surface(), surface_lock::pixels(), const_surface_lock::pixels(), surf, and sw.

Referenced by draw_panel(), and storyscreen::part_ui::prepare_background().

surface wipe_alpha	(	const surface &	surf,
		bool	optimize
	)

Definition at line 959 of file utils.cpp.

References create_optimized_surface(), make_neutral_surface(), and surface_lock::pixels().

Referenced by image::wipe_alpha_modification::operator()().