# gfx.cpp File Reference

Handling of drawing text and other gfx related stuff. More...

`#include "stdafx.h"`
`#include "gfx_func.h"`
`#include "variables.h"`
`#include "fontcache.h"`
`#include "genworld.h"`
`#include "zoom_func.h"`
`#include "blitter/factory.hpp"`
`#include "video/video_driver.hpp"`
`#include "strings_func.h"`
`#include "settings_type.h"`
`#include "landscape_type.h"`
`#include "network/network.h"`
`#include "network/network_func.h"`
`#include "thread/thread.h"`
`#include "window_func.h"`
`#include "table/palettes.h"`
`#include "table/sprites.h"`
`#include "table/control_codes.h"`
`#include <unicode/ubidi.h>`
`#include <unicode/ushape.h>`

Go to the source code of this file.

## Defines
#define | EXTR(p, q) (((uint16)(_palette_animation_counter * (p)) * (q)) >> 16)
#define | EXTR2(p, q) (((uint16)(~_palette_animation_counter * (p)) * (q)) >> 16)
## Enumerations
enum | { DIRTY_BLOCK_HEIGHT = 8, DIRTY_BLOCK_WIDTH = 64 }
## Functions
static void | GfxMainBlitter (const Sprite *sprite, int x, int y, BlitterMode mode, const SubSprite *sub=NULL)
void | GfxScroll (int left, int top, int width, int height, int xo, int yo)
void | GfxFillRect (int left, int top, int right, int bottom, int colour, FillRectMode mode)
| Applies a certain FillRectMode-operation to a rectangle [left, right] x [top, bottom] on the screen.
void | GfxDrawLine (int x, int y, int x2, int y2, int colour)
void | GfxDrawLineUnscaled (int x, int y, int x2, int y2, int colour)
void | DrawBox (int x, int y, int dx1, int dy1, int dx2, int dy2, int dx3, int dy3)
| Draws the projection of a parallelepiped.
static void | SetColourRemap (TextColour colour)
| Set the colour remap to be for the given colour.
static UChar * | HandleBiDiAndArabicShapes (UChar *buffer)
| Function to be able to handle right-to-left text and Arabic chars properly.
static int | TruncateString (char *str, int maxw, bool ignore_setxy)
| Truncate a given string to a maximum width if neccessary.
static int | ReallyDoDrawString (const UChar *string, int x, int y, TextColour &colour, bool parse_string_also_when_clipped)
| Draw a string at the given coordinates with the given colour.
static int | GetStringWidth (const UChar *str)
| Get the real width of the string.
static int | DrawString (int left, int right, int top, char *str, const char *last, TextColour colour, StringAlignment align, bool underline=false, bool truncate=true)
| Draw string, possibly truncated to make it fit in its allocated space.
int | DrawString (int left, int right, int top, const char *str, TextColour colour, StringAlignment align, bool underline)
| Draw string, possibly truncated to make it fit in its allocated space.
int | DrawString (int left, int right, int top, StringID str, TextColour colour, StringAlignment align, bool underline)
| Draw string, possibly truncated to make it fit in its allocated space.
uint32 | FormatStringLinebreaks (char *str, const char *last, int maxw)
| 'Correct' a string to a maximum length.
static int | GetMultilineStringHeight (const char *src, int num)
| Calculates height of string (in pixels).
int | GetStringHeight (StringID str, int maxw)
| Calculates height of string (in pixels).
Dimension | GetStringMultiLineBoundingBox (StringID str, const Dimension &suggestion)
| Calculate string bounding box for multi-line strings.
int | DrawStringMultiLine (int left, int right, int top, int bottom, StringID str, TextColour colour, StringAlignment align, bool underline)
| Draw string, possibly over multiple lines.
Dimension | GetStringBoundingBox (const char *str)
| Return the string dimension in pixels.
Dimension | GetStringBoundingBox (StringID strid)
| Get bounding box of a string.
void | DrawCharCentered (WChar c, int x, int y, TextColour colour)
| Draw single character horizontally centered around (x,y).
Dimension | GetSpriteSize (SpriteID sprid)
| Get the size of a sprite.
void | DrawSprite (SpriteID img, PaletteID pal, int x, int y, const SubSprite *sub)
| Draw a sprite.
void | DoPaletteAnimations ()
void | GfxInitPalettes ()
void | LoadStringWidthTable ()
| Initialize _stringwidth_table cache.
byte | GetCharacterWidth (FontSize size, WChar key)
| Return width of character glyph.
byte | GetDigitWidth (FontSize size)
| Return the maximum width of single digit.
void | ScreenSizeChanged ()
void | UndrawMouseCursor ()
void | DrawMouseCursor ()
void | RedrawScreenRect (int left, int top, int right, int bottom)
void | DrawDirtyBlocks ()
| Let the dirty blocks repainting by the video driver.
void | SetDirtyBlocks (int left, int top, int right, int bottom)
| Set a new dirty block.
void | MarkWholeScreenDirty ()
| Marks the whole screen as dirty.
bool | FillDrawPixelInfo (DrawPixelInfo *n, int left, int top, int width, int height)
| Set up a clipping area for only drawing into a certain area.
static void | SetCursorSprite (CursorID cursor, PaletteID pal)
static void | SwitchAnimatedCursor ()
void | CursorTick ()
void | SetMouseCursor (CursorID sprite, PaletteID pal)
void | SetAnimatedMouseCursor (const AnimCursor *table)
bool | ChangeResInGame (int width, int height)
bool | ToggleFullScreen (bool fs)
static int CDECL | compare_res (const Dimension *pa, const Dimension *pb)
void | SortResolutions (int count)
## Variables
byte | _dirkeys
| 1 = left, 2 = up, 4 = right, 8 = down
bool | _fullscreen
CursorVars | _cursor
bool | _ctrl_pressed
| Is Ctrl pressed?
bool | _shift_pressed
| Is Shift pressed?
byte | _fast_forward
bool | _left_button_down
| Is left mouse button pressed?
bool | _left_button_clicked
| Is left mouse button clicked?
bool | _right_button_down
| Is right mouse button pressed?
bool | _right_button_clicked
| Is right mouse button clicked?
DrawPixelInfo | _screen
bool | _screen_disable_anim = false
| Disable palette animation (important for 32bpp-anim blitter during giant screenshot).
bool | _exit_game
GameMode | _game_mode
SwitchMode | _switch_mode
| The next mainloop command.
PauseModeByte | _pause_mode
| The current pause mode.
int | _pal_first_dirty
int | _pal_count_dirty
Colour | _cur_palette [256]
| Current palette. Entry 0 has to be always fully transparent!
static int | _max_char_height
| Cache of the height of the largest font.
static int | _max_char_width
| Cache of the width of the largest font.
static byte | _stringwidth_table [FS_END][224]
| Cache containing width of often used characters.
DrawPixelInfo * | _cur_dpi
byte | _colour_gradient [COLOUR_END][8]
| All 16 colour gradients 8 colours per gradient from darkest (0) to lightest (7).
FontSize | _cur_fontsize
| Currently selected font.
static FontSize | _last_fontsize
static ReusableBuffer< uint8 > | _cursor_backup
static Rect | _invalid_rect
| The rect for repaint.
static const byte * | _colour_remap_ptr
static byte | _string_colourremap [3]
| Recoloursprite for stringdrawing. The grf loader ensures, that ST_FONT sprites only use colours 0 to 2.
static uint | _dirty_bytes_per_line = 0
static byte * | _dirty_blocks = NULL

## Detailed Description

Handling of drawing text and other gfx related stuff.

Definition in file gfx.cpp.

## Function Documentation

void DrawBox | ( | int | x,
|  | int | y,
|  | int | dx1,
|  | int | dy1,
|  | int | dx2,
|  | int | dy2,
|  | int | dx3,
|  | int | dy3 |
| ) |  |  |

Draws the projection of a parallelepiped.

This can be used to draw boxes in world coordinates.

Parameters:

  | x | Screen X-coordinate of top front corner.
  | y | Screen Y-coordinate of top front corner.
  | dx1 | Screen X-length of first edge.
  | dy1 | Screen Y-length of first edge.
  | dx2 | Screen X-length of second edge.
  | dy2 | Screen Y-length of second edge.
  | dx3 | Screen X-length of third edge.
  | dy3 | Screen Y-length of third edge.

Definition at line 215 of file gfx.cpp.

Referenced by ViewportDrawBoundingBoxes().

void DrawCharCentered | ( | WChar | c,
|  | int | x,
|  | int | y,
|  | TextColour | colour |
| ) |  |  |

Draw single character horizontally centered around (x,y).

Parameters:

  | c | Character (glyph) to draw
  | x | X position to draw character
  | y | Y position to draw character
  | colour | Colour to use, see DoDrawString() for details

Definition at line 918 of file gfx.cpp.

References FS_NORMAL, GetCharacterWidth(), and SetColourRemap().

Referenced by OskWindow::DrawWidget().

void DrawSprite | ( | SpriteID | img,
|  | PaletteID | pal,
|  | int | x,
|  | int | y,
|  | const SubSprite * | sub |
| ) |  |  |

Draw a sprite.

Parameters:

  | img | Image number to draw
  | pal | Palette to use.
  | x | Left coordinate of image
  | y | Top coordinate of image
  | sub | If available, draw only specified part of the sprite

Definition at line 1031 of file gfx.cpp.

References GB(), HasBit(), PALETTE_MODIFIER_TRANSPARENT, PALETTE_WIDTH, SPRITE_WIDTH, ST_NORMAL, and ST_RECOLOUR.

Referenced by SettingEntry::Draw(), DrawAircraftImage(), DrawArrowButtons(), DrawCargoIcons(), DrawCommonTileSeqInGUI(), DrawCompanyManagerFace(), DrawHorizontalScrollbar(), DrawImageButtons(), DrawOrderString(), TownAuthorityWindow::DrawRatings(), DrawResizeBox(), DrawRoadVehImage(), NetworkGameWindow::DrawServerLine(), DrawShadeBox(), DrawShipImage(), BuildSignalWindow::DrawSignalSprite(), DrawStationTile(), DrawStickyBox(), DrawTrainDetails(), DrawTrainImage(), DepotWindow::DrawVehicleInDepot(), DrawVehicleProfitButton(), VehicleViewWindow::DrawWidget(), BuildTreesWindow::DrawWidget(), TransparenciesWindow::DrawWidget(), ScenarioEditorLandscapeGenerationWindow::DrawWidget(), StatusBarWindow::DrawWidget(), NewGRFWindow::DrawWidget(), CompanyWindow::DrawWidget(), SelectCompanyLiveryWindow::DrawWidget(), CheatWindow::DrawWidget(), BuildBridgeWindow::DrawWidget(), and MainWindow::OnPaint().

int DrawString | ( | int | left,
|  | int | right,
|  | int | top,
|  | StringID | str,
|  | TextColour | colour,
|  | StringAlignment | align,
|  | bool | underline |
| ) |  |  |

Draw string, possibly truncated to make it fit in its allocated space.

Parameters:

  | left | The left most position to draw on.
  | right | The right most position to draw on.
  | top | The top most position to draw on.
  | str | String to draw.
  | colour | Colour used for drawing the string, see DoDrawString() for details
  | align | The alignment of the string when drawing left-to-right. In the case a right-to-left language is chosen this is inverted so it will be drawn in the right direction.
  | underline | Whether to underline what has been drawn or not.

Definition at line 614 of file gfx.cpp.

References DrawString(), and lastof.

int DrawString | ( | int | left,
|  | int | right,
|  | int | top,
|  | const char * | str,
|  | TextColour | colour,
|  | StringAlignment | align,
|  | bool | underline |
| ) |  |  |

Draw string, possibly truncated to make it fit in its allocated space.

Parameters:

  | left | The left most position to draw on.
  | right | The right most position to draw on.
  | top | The top most position to draw on.
  | str | String to draw.
  | colour | Colour used for drawing the string, see DoDrawString() for details
  | align | The alignment of the string when drawing left-to-right. In the case a right-to-left language is chosen this is inverted so it will be drawn in the right direction.
  | underline | Whether to underline what has been drawn or not.

Definition at line 594 of file gfx.cpp.

References DrawString(), lastof, and strecpy().

static int DrawString | ( | int | left,
|  | int | right,
|  | int | top,
|  | char * | str,
|  | const char * | last,
|  | TextColour | colour,
|  | StringAlignment | align,
|  | bool | underline = `false`,
|  | bool | truncate = `true` |
| ) |  |  | `[static]`

Draw string, possibly truncated to make it fit in its allocated space.

Parameters:

  | left | The left most position to draw on.
  | right | The right most position to draw on.
  | top | The top most position to draw on.
  | str | String to draw.
  | last | The end of the string buffer to draw.
  | colour | Colour used for drawing the string, see DoDrawString() for details
  | align | The alignment of the string when drawing left-to-right. In the case a right-to-left language is chosen this is inverted so it will be drawn in the right direction.
  | underline | Whether to underline what has been drawn or not.
  | truncate | Whether to truncate the string or not.

Returns:
  In case of left or center alignment the right most pixel we have drawn to. In case of right alignment the left most pixel we have drawn to.

Definition at line 443 of file gfx.cpp.

References _cur_fontsize, _dynlang, _string_colourremap, SmallVector< T, S >::Append(), SmallVector< T, S >::Begin(), SmallVector< T, S >::Clear(), SmallVector< T, S >::End(), FONT_HEIGHT_NORMAL, FS_NORMAL, GetStringBoundingBox(), GetStringWidth(), GfxFillRect(), HandleBiDiAndArabicShapes(), lastof, max(), min(), ReallyDoDrawString(), SA_CENTER, SA_FORCE, SA_LEFT, SA_MASK, SA_RIGHT, SA_STRIP, TD_RTL, DynamicLanguages::text_dir, and TruncateString().

Referenced by SettingEntry::Draw(), DrawAircraftDetails(), DrawButtonDropdown(), DrawCaption(), StationViewWindow::DrawCargoRatings(), DrawCategories(), DrawCloseBox(), NetworkContentListWindow::DrawDetails(), DrawEngineList(), SelectCompanyManagerFaceWindow::DrawFaceStringLabel(), DrawFrame(), BaseGraphWindow::DrawGraph(), IndustryViewWindow::DrawInfo(), DrawInset(), DrawLabel(), DrawNewsString(), DrawOrderString(), DrawPrice(), TownAuthorityWindow::DrawRatings(), DrawRoadVehDetails(), NetworkGameWindow::DrawServerLine(), SettingEntry::DrawSetting(), DrawShipDetails(), Window::DrawSortButtonState(), DrawString(), DrawStringMultiLine(), DrawText(), SmallMapWindow::DrawTowns(), DrawTrainDetails(), DepotWindow::DrawVehicleInDepot(), BaseVehicleListWindow::DrawVehicleListItems(), DrawVehiclePurchaseInfo(), DrawVehicleRefitWindow(), DrawVerticalScrollbar(), StationViewWindow::DrawWaitingCargo(), VehicleViewWindow::DrawWidget(), VehicleDetailsWindow::DrawWidget(), TownDirectoryWindow::DrawWidget(), TownViewWindow::DrawWidget(), TownAuthorityWindow::DrawWidget(), ScenarioEditorToolbarWindow::DrawWidget(), TimetableWindow::DrawWidget(), SubsidyListWindow::DrawWidget(), StatusBarWindow::DrawWidget(), SelectStationWindow< T >::DrawWidget(), CompanyStationsWindow::DrawWidget(), SmallMapWindow::DrawWidget(), SignListWindow::DrawWidget(), BuildRailStationWindow::DrawWidget(), OrdersWindow::DrawWidget(), MessageOptionsWindow::DrawWidget(), MessageHistoryWindow::DrawWidget(), NewGRFWindow::DrawWidget(), NewGRFAddWindow::DrawWidget(), NetworkJoinStatusWindow::DrawWidget(), NetworkClientListWindow::DrawWidget(), NetworkClientListPopupWindow::DrawWidget(), NetworkStartServerWindow::DrawWidget(), NetworkContentListWindow::DrawWidget(), NetworkContentDownloadStatusWindow::DrawWidget(), NetworkChatWindow::DrawWidget(), MusicWindow::DrawWidget(), MusicTrackSelectionWindow::DrawWidget(), SaveLoadWindow::DrawWidget(), AboutWindow::DrawWidget(), LandInfoWindow::DrawWidget(), IndustryDirectoryWindow::DrawWidget(), BuildIndustryWindow::DrawWidget(), VehicleGroupWindow::DrawWidget(), PerformanceRatingDetailWindow::DrawWidget(), CompanyLeagueWindow::DrawWidget(), PaymentRatesGraphWindow::DrawWidget(), GraphLegendWindow::DrawWidget(), GenerateProgressWindow::DrawWidget(), GenerateLandscapeWindow::DrawWidget(), EnginePreviewWindow::DrawWidget(), CompanyWindow::DrawWidget(), SelectCompanyManagerFaceWindow::DrawWidget(), SelectCompanyLiveryWindow::DrawWidget(), CompanyFinancesWindow::DrawWidget(), CheatWindow::DrawWidget(), ReplaceVehicleWindow::DrawWidget(), AIDebugWindow::DrawWidget(), AIConfigWindow::DrawWidget(), AISettingsWindow::DrawWidget(), AIListWindow::DrawWidget(), DrawYearColumn(), NetworkDrawChatMessage(), HighScoreWindow::OnPaint(), IConsoleWindow::OnPaint(), AirportPickerWindow::OnPaint(), StationsWndShowStationRating(), TrainDetailsCapacityTab(), TrainDetailsCargoTab(), and TrainDetailsInfoTab().

int DrawStringMultiLine | ( | int | left,
|  | int | right,
|  | int | top,
|  | int | bottom,
|  | StringID | str,
|  | TextColour | colour,
|  | StringAlignment | align,
|  | bool | underline |
| ) |  |  |

Draw string, possibly over multiple lines.

Parameters:

  | left | The left most position to draw on.
  | right | The right most position to draw on.
  | top | The top most position to draw on.
  | bottom | The bottom most position to draw on.
  | str | String to draw.
  | colour | Colour used for drawing the string, see DoDrawString() for details
  | align | The alignment of the string when drawing left-to-right. In the case a right-to-left language is chosen this is inverted so it will be drawn in the right direction.
  | underline | Whether to underline all strings

Returns:
  The bottom to where we have written.

Definition at line 801 of file gfx.cpp.

References _cur_fontsize, DrawString(), FormatStringLinebreaks(), FS_NORMAL, GB(), GetCharacterHeight(), lastof, SA_CENTER, and strecpy().

Referenced by DrawCargoListText(), NetworkContentListWindow::DrawDetails(), BaseGraphWindow::DrawGraph(), IndustryViewWindow::DrawInfo(), RefitWindow::DrawWidget(), TownAuthorityWindow::DrawWidget(), GameOptionsWindow::DrawWidget(), NewsWindow::DrawWidget(), NetworkContentDownloadStatusWindow::DrawWidget(), QueryWindow::DrawWidget(), TooltipsWindow::DrawWidget(), ErrmsgWindow::DrawWidget(), LandInfoWindow::DrawWidget(), BuildIndustryWindow::DrawWidget(), EnginePreviewWindow::DrawWidget(), BuyCompanyWindow::DrawWidget(), CompanyWindow::DrawWidget(), CheatWindow::DrawWidget(), BuildBridgeWindow::DrawWidget(), AIListWindow::DrawWidget(), HighScoreWindow::OnPaint(), EndGameWindow::OnPaint(), ShowAdditionalText(), and ShowRefitOptionsList().

bool FillDrawPixelInfo | ( | DrawPixelInfo * | n,
|  | int | left,
|  | int | top,
|  | int | width,
|  | int | height |
| ) |  |  |

Set up a clipping area for only drawing into a certain area.

To do this, Fill a DrawPixelInfo object with the supplied relative rectangle, backup the original (calling) _cur_dpi and assign the just returned DrawPixelInfo _cur_dpi. When you are done, give restore _cur_dpi's original value

Parameters:

  | *n | the DrawPixelInfo that will be the clipping rectangle box allowed for drawing
  | left,top,width,height | the relative coordinates of the clipping rectangle relative to the current _cur_dpi. This will most likely be the offset from the calling window coordinates

Returns:
  return false if the requested rectangle is not possible with the current dpi pointer. Only continue of the return value is true, or you'll get some nasty results

Definition at line 1602 of file gfx.cpp.

References BlitterFactoryBase::GetCurrentBlitter(), and Blitter::MoveTo().

Referenced by DrawTrainImage(), SmallMapWindow::DrawWidget(), and BuildRailStationWindow::DrawWidget().

uint32 FormatStringLinebreaks | ( | char * | str,
|  | const char * | last,
|  | int | maxw |
| ) |  |  |

'Correct' a string to a maximum length.

Longer strings will be cut into additional lines at whitespace characters if possible. The string parameter is modified with terminating characters mid-string which are the placeholders for the newlines. The string WILL be truncated if there was no whitespace for the current line's maximum width.

Note:
  To know if the terminating '' is the string end or just a newline, the returned 'num' value should be consulted. The num'th '', starting with index 0 is the real string end.

Parameters:

  | str | string to check and correct for length restrictions
  | last | the last valid location (for '') in the buffer of str
  | maxw | the maximum width the string can have on one line

Returns:
  return a 32bit wide number consisting of 2 packed values: 0 - 15 the number of lines ADDED to the string 16 - 31 the fontsize in which the length calculation was done at

Definition at line 640 of file gfx.cpp.

References _cur_fontsize, FS_LARGE, FS_SMALL, GetCharacterWidth(), IsWhitespace(), SCC_BIGFONT, SCC_TINYFONT, and Utf8PrevChar().

Referenced by DrawStringMultiLine(), GetStringHeight(), and NetworkAddChatMessage().

byte GetCharacterWidth | ( | FontSize | size,
|  | WChar | key |
| ) |  |  |

Return width of character glyph.

Parameters:

  | size | Font of the character
  | key | Character code glyph

Returns:
  Width of the character glyph

Definition at line 1302 of file gfx.cpp.

References _stringwidth_table.

Referenced by DrawCharCentered(), FormatStringLinebreaks(), GetDigitWidth(), GetStringBoundingBox(), GetStringWidth(), InsertTextBufferChar(), InsertTextBufferClipboard(), MoveTextBufferPos(), ReallyDoDrawString(), TruncateString(), and UpdateTextBufferSize().

byte GetDigitWidth | ( | FontSize | size | ) |

Return the maximum width of single digit.

Parameters:

  | size | Font of the digit

Returns:
  Width of the digit.

Definition at line 1315 of file gfx.cpp.

References GetCharacterWidth(), and max().

Referenced by BaseVehicleListWindow::DrawVehicleListItems(), and DepotWindow::UpdateWidgetSize().

static int GetMultilineStringHeight | ( | const char * | src,
|  | int | num |
| ) |  |  | `[static]`

Calculates height of string (in pixels).

Accepts multiline string with '' as separators.

Parameters:

  | src | string to check
  | num | number of extra lines (output of FormatStringLinebreaks())

Note:
  assumes text won't be truncated. FormatStringLinebreaks() is a good way to ensure that.

Returns:
  height of pixels of string when it is drawn

Definition at line 736 of file gfx.cpp.

References _cur_fontsize, FS_LARGE, FS_SMALL, GetCharacterHeight(), SCC_BIGFONT, and SCC_TINYFONT.

Referenced by GetStringHeight().

Dimension GetSpriteSize | ( | SpriteID | sprid | ) |

Get the size of a sprite.

Parameters:

  | sprid | Sprite to examine.

Returns:
  Sprite size in pixels.

Note:
  The size assumes (0, 0) as top-left coordinate and ignores any part of the sprite drawn at the left or above that position.

Definition at line 1013 of file gfx.cpp.

References Sprite::height, ST_NORMAL, Sprite::width, Sprite::x_offs, and Sprite::y_offs.

Referenced by DrawOrderString(), TimetableWindow::DrawWidget(), OrdersWindow::DrawWidget(), PerformanceRatingDetailWindow::DrawWidget(), BuildBridgeWindow::DrawWidget(), MakeCompanyButtonRows(), SelectCompanyManagerFaceWindow::OnInit(), MainWindow::OnPaint(), NWidgetLeaf::SetupSmallestSize(), ScenarioEditorToolbarWindow::UpdateWidgetSize(), SignListWindow::UpdateWidgetSize(), NetworkClientListWindow::UpdateWidgetSize(), BuyCompanyWindow::UpdateWidgetSize(), CompanyWindow::UpdateWidgetSize(), and BuildBridgeWindow::UpdateWidgetSize().

Dimension GetStringBoundingBox | ( | StringID | strid | ) |

Get bounding box of a string.

Uses parameters set by DParam if needed. Has the same restrictions as GetStringBoundingBox(const char *str).

Parameters:

  | strid | String to examine.

Returns:
  Width and height of the bounding box for the string in pixels.

Definition at line 903 of file gfx.cpp.

References GetStringBoundingBox(), and lastof.

Dimension GetStringBoundingBox | ( | const char * | str | ) |

Return the string dimension in pixels.

The height and width are returned in a single Dimension value. TINYFONT, BIGFONT modifiers are only supported as the first character of the string. The returned dimensions are therefore a rough estimation correct for all the current strings but not every possible combination

Parameters:

  | str | string to calculate pixel-width

Returns:
  string width and height in pixels

Definition at line 861 of file gfx.cpp.

References _cur_fontsize, FS_LARGE, FS_SMALL, GetCharacterHeight(), GetCharacterWidth(), max(), SCC_BIGFONT, and SCC_TINYFONT.

Referenced by DrawLabel(), DrawString(), DrawText(), TimetableWindow::DrawWidget(), OrdersWindow::DrawWidget(), CheatWindow::DrawWidget(), ExpensesList::GetCategoriesWidth(), GetStringBoundingBox(), SmallMapWindow::OnInit(), MessageOptionsWindow::OnInit(), SelectCompanyManagerFaceWindow::OnInit(), NWidgetLeaf::SetupSmallestSize(), NWidgetBackground::SetupSmallestSize(), ViewportSign::UpdatePosition(), VehicleDetailsWindow::UpdateWidgetSize(), TownDirectoryWindow::UpdateWidgetSize(), TownAuthorityWindow::UpdateWidgetSize(), ScenarioEditorToolbarWindow::UpdateWidgetSize(), TimetableWindow::UpdateWidgetSize(), SubsidyListWindow::UpdateWidgetSize(), StatusBarWindow::UpdateWidgetSize(), SelectStationWindow< T >::UpdateWidgetSize(), StationViewWindow::UpdateWidgetSize(), CompanyStationsWindow::UpdateWidgetSize(), SignListWindow::UpdateWidgetSize(), CustomCurrencyWindow::UpdateWidgetSize(), GameDifficultyWindow::UpdateWidgetSize(), GameOptionsWindow::UpdateWidgetSize(), BuildRailStationWindow::UpdateWidgetSize(), OrdersWindow::UpdateWidgetSize(), MessageHistoryWindow::UpdateWidgetSize(), NewGRFWindow::UpdateWidgetSize(), NetworkJoinStatusWindow::UpdateWidgetSize(), NetworkClientListWindow::UpdateWidgetSize(), NetworkClientListPopupWindow::UpdateWidgetSize(), NetworkStartServerWindow::UpdateWidgetSize(), NetworkGameWindow::UpdateWidgetSize(), NetworkContentListWindow::UpdateWidgetSize(), NetworkChatWindow::UpdateWidgetSize(), MusicWindow::UpdateWidgetSize(), MusicTrackSelectionWindow::UpdateWidgetSize(), TooltipsWindow::UpdateWidgetSize(), AboutWindow::UpdateWidgetSize(), LandInfoWindow::UpdateWidgetSize(), SelectGameWindow::UpdateWidgetSize(), IndustryDirectoryWindow::UpdateWidgetSize(), BuildIndustryWindow::UpdateWidgetSize(), VehicleGroupWindow::UpdateWidgetSize(), PerformanceRatingDetailWindow::UpdateWidgetSize(), CompanyLeagueWindow::UpdateWidgetSize(), PaymentRatesGraphWindow::UpdateWidgetSize(), BaseGraphWindow::UpdateWidgetSize(), GenerateProgressWindow::UpdateWidgetSize(), CreateScenarioWindow::UpdateWidgetSize(), GenerateLandscapeWindow::UpdateWidgetSize(), DepotWindow::UpdateWidgetSize(), SetDateWindow::UpdateWidgetSize(), CompanyWindow::UpdateWidgetSize(), SelectCompanyManagerFaceWindow::UpdateWidgetSize(), SelectCompanyLiveryWindow::UpdateWidgetSize(), CompanyFinancesWindow::UpdateWidgetSize(), CheatWindow::UpdateWidgetSize(), BuildBridgeWindow::UpdateWidgetSize(), and ReplaceVehicleWindow::UpdateWidgetSize().

int GetStringHeight | ( | StringID | str,
|  | int | maxw |
| ) |  |  |

Calculates height of string (in pixels).

The string is changed to a multiline string if needed.

Parameters:

  | str | string to check
  | maxw | maximum string width

Returns:
  height of pixels of string when it is drawn

Definition at line 763 of file gfx.cpp.

References FormatStringLinebreaks(), GB(), GetMultilineStringHeight(), and lastof.

Referenced by EnginePreviewWindow::DrawWidget(), GetStringMultiLineBoundingBox(), GameOptionsWindow::UpdateWidgetSize(), TooltipsWindow::UpdateWidgetSize(), ErrmsgWindow::UpdateWidgetSize(), LandInfoWindow::UpdateWidgetSize(), EnginePreviewWindow::UpdateWidgetSize(), BuyCompanyWindow::UpdateWidgetSize(), and CheatWindow::UpdateWidgetSize().

Dimension GetStringMultiLineBoundingBox | ( | StringID | str,
|  | const Dimension & | suggestion |
| ) |  |  |

Calculate string bounding box for multi-line strings.

Parameters:

  | str | String to check.
  | suggestion | Suggested bounding box.

Returns:
  Bounding box for the multi-line string, may be bigger than suggestion.

Definition at line 779 of file gfx.cpp.

References GetStringHeight().

Referenced by TownAuthorityWindow::UpdateWidgetSize(), NewsWindow::UpdateWidgetSize(), and QueryWindow::UpdateWidgetSize().

static int GetStringWidth | ( | const UChar * | str | ) | `[static]`

Get the real width of the string.

Parameters:

  | str | the string to draw

Returns:
  the width.

Definition at line 393 of file gfx.cpp.

References _cur_fontsize, FS_LARGE, FS_SMALL, GetCharacterWidth(), max(), SCC_BIGFONT, and SCC_TINYFONT.

Referenced by DrawString().

void GfxFillRect | ( | int | left,
|  | int | top,
|  | int | right,
|  | int | bottom,
|  | int | colour,
|  | FillRectMode | mode |
| ) |  |  |

Applies a certain FillRectMode-operation to a rectangle [left, right] x [top, bottom] on the screen.

Precondition:
  dpi->zoom == ZOOM_LVL_NORMAL, right >= left, bottom >= top

Parameters:

  | left | Minimum X (inclusive)
  | top | Minimum Y (inclusive)
  | right | Maximum X (inclusive)
  | bottom | Maximum Y (inclusive)
  | colour | A 8 bit palette index (FILLRECT_OPAQUE and FILLRECT_CHECKER) or a recolour spritenumber (FILLRECT_RECOLOUR)
  | mode | FILLRECT_OPAQUE: Fill the rectangle with the specified colour FILLRECT_CHECKER: Like FILLRECT_OPAQUE, but only draw every second pixel (used to grey out things) FILLRECT_RECOLOUR: Apply a recolour sprite to every pixel in the rectangle currently on screen

Definition at line 115 of file gfx.cpp.

References Blitter::DrawColourMappingRect(), Blitter::DrawRect(), FILLRECT_CHECKER, FILLRECT_RECOLOUR, GB(), BlitterFactoryBase::GetCurrentBlitter(), Blitter::MoveTo(), PALETTE_WIDTH, and Blitter::SetPixel().

Referenced by NWidgetLeaf::Draw(), NWidgetViewport::Draw(), NWidgetBackground::Draw(), NWidgetToolbarContainer::Draw(), DrawArrowButtons(), DrawCaption(), NetworkContentListWindow::DrawDetails(), DrawFrame(), DrawFrameRect(), BaseGraphWindow::DrawGraph(), SmallMapWindow::DrawHorizMapIndicator(), DrawHorizontalScrollbar(), DrawMatrix(), NetworkGameWindow::DrawServerLine(), SmallMapWindow::DrawSmallMap(), DrawString(), DrawTrainDetails(), DrawVerticalScrollbar(), SmallMapWindow::DrawVertMapIndicator(), DropdownWindow::DrawWidget(), CompanyStationsWindow::DrawWidget(), SmallMapWindow::DrawWidget(), BuildRailStationWindow::DrawWidget(), NewsWindow::DrawWidget(), NewGRFAddWindow::DrawWidget(), NetworkClientListWindow::DrawWidget(), NetworkClientListPopupWindow::DrawWidget(), MusicWindow::DrawWidget(), MusicTrackSelectionWindow::DrawWidget(), SaveLoadWindow::DrawWidget(), TooltipsWindow::DrawWidget(), BuildIndustryWindow::DrawWidget(), PerformanceRatingDetailWindow::DrawWidget(), PaymentRatesGraphWindow::DrawWidget(), CompanyFinancesWindow::DrawWidget(), DrawYearColumn(), NetworkDrawChatMessage(), BuildRailWaypointWindow::OnPaint(), IConsoleWindow::OnPaint(), and StationsWndShowStationRating().

static UChar* HandleBiDiAndArabicShapes | ( | UChar * | buffer | ) | `[static]`

Function to be able to handle right-to-left text and Arabic chars properly.

First: right-to-left (RTL) is stored 'logically' in almost all applications and so do we. This means that their text is stored from right to the left in memory and any non-RTL text (like numbers or English) are then stored from left-to-right. When we want to actually draw the text we need to reverse the RTL text in memory, which is what happens in ubidi_writeReordered. Second: Arabic characters "differ" based on their context. To draw the correct variant we pass it through u_shapeArabic. This function can add or remove some characters. This is the reason for the lastof so we know till where we can fill the output.

Sadly enough these functions work with a custom character format, UChar, which isn't the same size as WChar. Because of that we need to transform our text first to UChars and then back to something we can use.

To be able to truncate strings properly you must truncate before passing to this function. This way the logical begin of the string remains and the end gets chopped of instead of the other way around.

The reshaping of Arabic characters might increase or decrease the width of the characters/string. So it might still overflow after truncation, though the chance is fairly slim as most characters get shorter instead of longer.

Parameters:

  | buffer | the buffer to read from/to
  | lastof | the end of the buffer

Returns:
  the buffer to draw from

Definition at line 300 of file gfx.cpp.

References _dynlang, lengthof, TD_RTL, and DynamicLanguages::text_dir.

Referenced by DrawString().

static int ReallyDoDrawString | ( | const UChar * | string,
|  | int | x,
|  | int | y,
|  | TextColour & | colour,
|  | bool | parse_string_also_when_clipped |
| ) |  |  | `[static]`

Draw a string at the given coordinates with the given colour.

While drawing the string, parse it in case some formatting is specified, like new colour, new size or even positionning.

Parameters:

  | string | The string to draw. This is already bidi reordered.
  | x | Offset from left side of the screen
  | y | Offset from top side of the screen
  | colour | Colour of the string, see _string_colourmap in table/palettes.h or docs/ottd-colourtext-palette.png or the enum TextColour in gfx_type.h
  | parse_string_also_when_clipped | By default, always test the available space where to draw the string. When in multipline drawing, it would already be done, so no need to re-perform the same kind (more or less) of verifications. It's not only an optimisation, it's also a way to ensures the string will be parsed (as there are certain side effects on global variables, which are important for the next line)

Returns:
  the x-coordinates where the drawing has finished. If nothing is drawn, the originally passed x-coordinate is returned

Definition at line 941 of file gfx.cpp.

References _cur_fontsize, _max_char_width, FS_LARGE, FS_SMALL, GetCharacterHeight(), GetCharacterWidth(), SCC_BIGFONT, SCC_TINYFONT, SetColourRemap(), and Swap().

Referenced by DrawString().

static void SetColourRemap | ( | TextColour | colour | ) | `[static]`

Set the colour remap to be for the given colour.

Parameters:

  | colour | the new colour of the remap.

Definition at line 250 of file gfx.cpp.

References _string_colourremap, _use_palette, IS_PALETTE_COLOUR, and PAL_DOS.

Referenced by DrawCharCentered(), and ReallyDoDrawString().

static int TruncateString | ( | char * | str,
|  | int | maxw,
|  | bool | ignore_setxy |
| ) |  |  | `[static]`

Truncate a given string to a maximum width if neccessary.

If the string is truncated, add three dots ('...') to show this.

Parameters:

  | *str | string that is checked and possibly truncated
  | maxw | maximum width in pixels of the string
  | ignore_setxy | whether to ignore SETX(Y) or not

Returns:
  new width of (truncated) string

Definition at line 336 of file gfx.cpp.

References _cur_fontsize, FS_LARGE, FS_SMALL, GetCharacterWidth(), SCC_BIGFONT, and SCC_TINYFONT.

Referenced by DrawString().

## Variable Documentation

byte _stringwidth_table[FS_END][224]`[static]`

Cache containing width of often used characters.

See also:
  GetCharacterWidth()

Definition at line 55 of file gfx.cpp.

Referenced by GetCharacterWidth(), and LoadStringWidthTable().