OpenTTD Source
20241120-master-g6d3adc6169
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The layouter performs all the layout work. More...
#include <gfx_layout.h>
Data Structures | |
struct | LineCacheCompare |
Comparator for std::map. More... | |
struct | LineCacheItem |
Item in the linecache. More... | |
struct | LineCacheKey |
Key into the linecache. More... | |
struct | LineCacheQuery |
Public Member Functions | |
Layouter (std::string_view str, int maxw=INT32_MAX, FontSize fontsize=FS_NORMAL) | |
Create a new layouter. More... | |
Dimension | GetBounds () |
Get the boundaries of this paragraph. More... | |
ParagraphLayouter::Position | GetCharPosition (std::string_view::const_iterator ch) const |
Get the position of a character in the layout. More... | |
ptrdiff_t | GetCharAtPosition (int x, size_t line_index) const |
Get the character that is at a pixel position in the first line of the layouted text. More... | |
Static Public Member Functions | |
static Font * | GetFont (FontSize size, TextColour colour) |
Get a static font instance. | |
static void | Initialize () |
Perform initialization of layout engine. | |
static void | ResetFontCache (FontSize size) |
Reset cached font information. More... | |
static void | ResetLineCache () |
Clear line cache. | |
static void | ReduceLineCache () |
Reduce the size of linecache if necessary to prevent infinite growth. | |
Private Types | |
typedef std::map< LineCacheKey, LineCacheItem, LineCacheCompare > | LineCache |
using | FontColourMap = std::map< TextColour, std::unique_ptr< Font > > |
Static Private Member Functions | |
static LineCacheItem & | GetCachedParagraphLayout (std::string_view str, const FontState &state) |
Get reference to cache item. More... | |
Private Attributes | |
std::string_view | string |
Pointer to the original string. | |
Static Private Attributes | |
static LineCache * | linecache |
Cache of ParagraphLayout lines. | |
static FontColourMap | fonts [FS_END] |
Cache of Font instances. | |
The layouter performs all the layout work.
It also accounts for the memory allocations and frees.
Definition at line 138 of file gfx_layout.h.
Create a new layouter.
str | The string to create the layout for. |
maxw | The maximum width. |
fontsize | The size of font to use. |
Definition at line 130 of file gfx_layout.cpp.
Dimension Layouter::GetBounds | ( | ) |
Get the boundaries of this paragraph.
Definition at line 199 of file gfx_layout.cpp.
Referenced by DrawStringMultiLine(), GetStringBoundingBox(), and GetStringHeight().
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staticprivate |
Get reference to cache item.
If the item does not exist yet, it is default constructed.
str | Source string of the line (including colour and font size codes). |
state | State of the font at the beginning of the line. |
Definition at line 375 of file gfx_layout.cpp.
References linecache, Layouter::LineCacheKey::state_before, and Layouter::LineCacheKey::str.
ptrdiff_t Layouter::GetCharAtPosition | ( | int | x, |
size_t | line_index | ||
) | const |
Get the character that is at a pixel position in the first line of the layouted text.
x | Position in the string. |
line_index | Which line of the layout to search |
Definition at line 290 of file gfx_layout.cpp.
Referenced by TextfileWindow::CheckHyperlinkClick().
ParagraphLayouter::Position Layouter::GetCharPosition | ( | std::string_view::const_iterator | ch | ) | const |
Get the position of a character in the layout.
ch | Character to get the position of. Must be an iterator of the string passed to the constructor. |
Definition at line 228 of file gfx_layout.cpp.
References _current_text_dir, and TD_LTR.
Referenced by GetCharPosInString().
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static |
Reset cached font information.
size | Font size to reset. |
Definition at line 353 of file gfx_layout.cpp.
References fonts, and ResetLineCache().
Referenced by SpriteFontCache::ClearFontCache(), TrueTypeFontCache::ClearFontCache(), and FontCache::~FontCache().