viewport_func.h File Reference

Functions related to (drawing on) viewports. More...

#include "gfx_type.h"
#include "viewport_type.h"
#include "vehicle_type.h"
#include "strings_type.h"
#include "window_type.h"
#include "tile_type.h"

Go to the source code of this file.

Functions

void SetSelectionRed (bool)
void DeleteWindowViewport (Window *w)
void InitializeWindowViewport (Window *w, int x, int y, int width, int height, uint32 follow_flags, ZoomLevel zoom)
 Initialize viewport of the window for use.
ViewPortIsPtInWindowViewport (const Window *w, int x, int y)
 Is a xy position inside the viewport of the window?
Point GetTileBelowCursor ()
void UpdateViewportPosition (Window *w)
void UpdateViewportSignPos (ViewportSign *sign, int left, int top, StringID str)
bool DoZoomInOutWindow (int how, Window *w)
void ZoomInOrOutToCursorWindow (bool in, Window *w)
Point GetTileZoomCenterWindow (bool in, Window *w)
void HandleZoomMessage (Window *w, const ViewPort *vp, byte widget_zoom_in, byte widget_zoom_out)
 Update the status of the zoom-buttons according to the zoom-level of the viewport.
static void MaxZoomInOut (int how, Window *w)
void OffsetGroundSprite (int x, int y)
 Called when a foundation has been drawn for the current tile.
void DrawGroundSprite (SpriteID image, SpriteID pal, const SubSprite *sub=NULL)
 Draws a ground sprite for the current tile.
void DrawGroundSpriteAt (SpriteID image, SpriteID pal, int32 x, int32 y, byte z, const SubSprite *sub=NULL)
 Draws a ground sprite at a specific world-coordinate.
void AddSortableSpriteToDraw (SpriteID image, SpriteID pal, int x, int y, int w, int h, int dz, int z, bool transparent=false, int bb_offset_x=0, int bb_offset_y=0, int bb_offset_z=0, const SubSprite *sub=NULL)
 Draw a (transparent) sprite at given coordinates with a given bounding box.
void AddStringToDraw (int x, int y, StringID string, uint64 params_1, uint64 params_2, uint16 colour=0, uint16 width=0)
void AddChildSpriteScreen (SpriteID image, SpriteID pal, int x, int y, bool transparent=false, const SubSprite *sub=NULL)
 Add a child sprite to a parent sprite.
void StartSpriteCombine ()
void EndSpriteCombine ()
bool HandleViewportClicked (const ViewPort *vp, int x, int y)
void PlaceObject ()
void SetRedErrorSquare (TileIndex tile)
void SetTileSelectSize (int w, int h)
void SetTileSelectBigSize (int ox, int oy, int sx, int sy)
Vehicle * CheckMouseOverVehicle ()
void ViewportDoDraw (const ViewPort *vp, int left, int top, int right, int bottom)
bool ScrollWindowTo (int x, int y, int z, Window *w, bool instant=false)
bool ScrollMainWindowToTile (TileIndex tile, bool instant=false)
bool ScrollMainWindowTo (int x, int y, int z=-1, bool instant=false)
 Scrolls the main window to given coordinates.

Variables

Point _tile_fract_coords


Detailed Description

Functions related to (drawing on) viewports.

Definition in file viewport_func.h.


Function Documentation

void AddChildSpriteScreen ( SpriteID  image,
SpriteID  pal,
int  x,
int  y,
bool  transparent,
const SubSprite sub 
)

Add a child sprite to a parent sprite.

Parameters:
image the image to draw.
pal the provided palette.
x sprite x-offset (screen coordinates) relative to parent sprite.
y sprite y-offset (screen coordinates) relative to parent sprite.
transparent if true, switch the palette between the provided palette and the transparent palette,
sub Only draw a part of the sprite.

Definition at line 704 of file viewport.cpp.

References SmallVector< T, S >::Append(), ViewportDrawer::child_screen_sprites_to_draw, ViewportDrawer::last_child, ViewportDrawer::last_foundation_child, SmallVector< T, S >::Length(), MAX_SPRITES, PALETTE_MODIFIER_TRANSPARENT, SetBit(), and SPRITE_MASK.

Referenced by AddChildSpriteToFoundation(), and AddCombinedSprite().

void AddSortableSpriteToDraw ( SpriteID  image,
SpriteID  pal,
int  x,
int  y,
int  w,
int  h,
int  dz,
int  z,
bool  transparent,
int  bb_offset_x,
int  bb_offset_y,
int  bb_offset_z,
const SubSprite sub 
)

Draw a (transparent) sprite at given coordinates with a given bounding box.

The bounding box extends from (x + bb_offset_x, y + bb_offset_y, z + bb_offset_z) to (x + w - 1, y + h - 1, z + dz - 1), both corners included. Bounding boxes with bb_offset_x == w or bb_offset_y == h or bb_offset_z == dz are allowed and produce thin slices.

Note:
Bounding boxes are normally specified with bb_offset_x = bb_offset_y = bb_offset_z = 0. The extent of the bounding box in negative direction is defined by the sprite offset in the grf file. However if modifying the sprite offsets is not suitable (e.g. when using existing graphics), the bounding box can be tuned by bb_offset.
Precondition:
w >= bb_offset_x, h >= bb_offset_y, dz >= bb_offset_z. Else w, h or dz are ignored.
Parameters:
image the image to combine and draw,
pal the provided palette,
x position X (world) of the sprite,
y position Y (world) of the sprite,
w bounding box extent towards positive X (world),
h bounding box extent towards positive Y (world),
dz bounding box extent towards positive Z (world),
z position Z (world) of the sprite,
transparent if true, switch the palette between the provided palette and the transparent palette,
bb_offset_x bounding box extent towards negative X (world),
bb_offset_y bounding box extent towards negative Y (world),
bb_offset_z bounding box extent towards negative Z (world)
sub Only draw a part of the sprite.

Definition at line 605 of file viewport.cpp.

References AddCombinedSprite(), SmallVector< T, S >::Append(), ViewportDrawer::combine_sprites, ParentSpriteToDraw::comparison_done, ViewportDrawer::dpi, ParentSpriteToDraw::first_child, ParentSpriteToDraw::image, ViewportDrawer::last_child, ParentSpriteToDraw::left, max(), MAX_SPRITES, min(), ParentSpriteToDraw::pal, PALETTE_MODIFIER_TRANSPARENT, ViewportDrawer::parent_sprites_to_draw, SetBit(), SPRITE_MASK, ST_NORMAL, ParentSpriteToDraw::sub, ParentSpriteToDraw::top, ParentSpriteToDraw::x, Point::x, ParentSpriteToDraw::xmax, ParentSpriteToDraw::xmin, ParentSpriteToDraw::y, Point::y, ParentSpriteToDraw::ymax, ParentSpriteToDraw::ymin, ParentSpriteToDraw::zmax, and ParentSpriteToDraw::zmin.

Referenced by DrawBridgePillars(), DrawBridgeTramBits(), DrawCatenary(), DrawCatenaryOnTunnel(), DrawCatenaryRailway(), DrawFoundation(), DrawRoadDetail(), DrawTile_Road(), DrawTile_Town(), DrawTile_TunnelBridge(), DrawTrackBits(), DrawTrackFence_NS_1(), DrawTrackFence_NS_2(), DrawTrackFence_WE_1(), DrawTrackFence_WE_2(), and DrawTramCatenary().

void DrawGroundSprite ( SpriteID  image,
SpriteID  pal,
const SubSprite sub 
)

Draws a ground sprite for the current tile.

If the current tile is drawn on top of a foundation the sprite is added as child sprite to the "foundation"-ParentSprite.

Parameters:
image the image to draw.
pal the provided palette.
sub Only draw a part of the sprite.

Definition at line 514 of file viewport.cpp.

References AddChildSpriteToFoundation(), DrawGroundSpriteAt(), ViewportDrawer::foundation, ViewportDrawer::foundation_part, FOUNDATION_PART_NONE, FOUNDATION_PART_NORMAL, TileInfo::x, TileInfo::y, and TileInfo::z.

Referenced by DrawCanalWater(), DrawRoadBits(), DrawSeaWater(), DrawTile_Road(), DrawTile_Town(), DrawTile_TunnelBridge(), and DrawTrackBits().

void DrawGroundSpriteAt ( SpriteID  image,
SpriteID  pal,
int32  x,
int32  y,
byte  z,
const SubSprite sub 
)

Draws a ground sprite at a specific world-coordinate.

Parameters:
image the image to draw.
pal the provided palette.
x position x of the sprite.
y position y of the sprite.
z position z of the sprite.
sub Only draw a part of the sprite.

Definition at line 465 of file viewport.cpp.

References SmallVector< T, S >::Append(), MAX_SPRITES, SPRITE_MASK, and ViewportDrawer::tile_sprites_to_draw.

Referenced by DrawGroundSprite(), and DrawSelectionSprite().

void HandleZoomMessage ( Window w,
const ViewPort vp,
byte  widget_zoom_in,
byte  widget_zoom_out 
)

Update the status of the zoom-buttons according to the zoom-level of the viewport.

This will update their status and invalidate accordingly

Parameters:
w Window pointer to the window that has the zoom buttons
vp pointer to the viewport whose zoom-level the buttons represent
widget_zoom_in widget index for window with zoom-in button
widget_zoom_out widget index for window with zoom-out button

Definition at line 445 of file viewport.cpp.

References Window::InvalidateWidget(), Window::SetWidgetDisabledState(), and ViewPort::zoom.

void InitializeWindowViewport ( Window w,
int  x,
int  y,
int  width,
int  height,
uint32  follow_flags,
ZoomLevel  zoom 
)

Initialize viewport of the window for use.

Parameters:
w Window to use/display the viewport in
x Offset of left edge of viewport with respect to left edge window w
y Offset of top edge of viewport with respect to top edge window w
width Width of the viewport
height Height of the viewport
follow_flags Flags controlling the viewport.
  • If bit 31 is set, the lower 16 bits are the vehicle that the viewport should follow.
  • If bit 31 is clear, it is a tile position.
zoom Zoomlevel to display

Definition at line 166 of file viewport.cpp.

References ViewportData::dest_scrollpos_x, ViewportData::dest_scrollpos_y, ViewportData::follow_vehicle, ViewPort::height, Window::left, ViewPort::left, ScaleByZoom(), ViewportData::scrollpos_x, ViewportData::scrollpos_y, TILE_SIZE, TileX(), TileY(), Window::top, ViewPort::top, Window::viewport, ViewPort::virtual_height, ViewPort::virtual_left, ViewPort::virtual_top, ViewPort::virtual_width, ViewPort::width, Point::x, Point::y, and ViewPort::zoom.

Referenced by ShowNewspaper().

ViewPort* IsPtInWindowViewport ( const Window w,
int  x,
int  y 
)

Is a xy position inside the viewport of the window?

Parameters:
w Window to examine its viewport
x X coordinate of the xy position
y Y coordinate of the xy position
Returns:
Pointer to the viewport if the xy position is in the viewport of the window, otherwise NULL is returned.

Definition at line 337 of file viewport.cpp.

References ViewPort::height, IsInsideMM(), ViewPort::left, ViewPort::top, Window::viewport, and ViewPort::width.

Referenced by HandleAutoscroll().

void OffsetGroundSprite ( int  x,
int  y 
)

Called when a foundation has been drawn for the current tile.

Successive ground sprites for the current tile will be drawn as child sprites of the "foundation"-ParentSprite, not as TileSprites.

Parameters:
x sprite x-offset (screen coordinates) of ground sprites relative to the "foundation"-ParentSprite.
y sprite y-offset (screen coordinates) of ground sprites relative to the "foundation"-ParentSprite.

Definition at line 534 of file viewport.cpp.

References ViewportDrawer::foundation, ViewportDrawer::foundation_offset, ViewportDrawer::foundation_part, FOUNDATION_PART_HALFTILE, FOUNDATION_PART_NONE, FOUNDATION_PART_NORMAL, ViewportDrawer::last_child, ViewportDrawer::last_foundation_child, SmallVector< T, S >::Length(), ViewportDrawer::parent_sprites_to_draw, Point::x, and Point::y.

Referenced by DrawFoundation().

bool ScrollMainWindowTo ( int  x,
int  y,
int  z,
bool  instant 
)

Scrolls the main window to given coordinates.

Parameters:
x x coordinate
y y coordinate
z z coordinate; -1 to scroll to terrain height
instant scroll instantly (meaningful only when smooth_scrolling is active)
Returns:
did the viewport position change?

Definition at line 1225 of file smallmap_gui.cpp.

References FindWindowById().


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