Class TSimpleTextureFont

Unit

CastleFonts

Declaration

type TSimpleTextureFont = class(TCastleFont)

Description

Font using a texture to define character images with constant width and height.

This class has some assumptions about how the font image looks like: the characters are drawn in ASCII order, starting from space, on an image. Derive your own descendants of TCastleFont to have more flexibility, see the implementation of this class — it is quite simple. Or use TTextureFont that can read data from a FreeType (like ttf) font file.

See e.g. castle_game_engine/examples/fonts/data/sonic_asalga_0.png how to prepare an image for use with such font. You can find more such fonts on the Internet, see e.g. http://opengameart.org/content/sonic-font and http://opengameart.org/content/null-terminator.

Hierarchy

• TObject
• TPersistent
• TComponent
• TCastleFont
• TSimpleTextureFont

Overview

Methods

	constructor Create(AOwner: TComponent); override;
	destructor Destroy; override;
	procedure Load(AImage: TCastleImage; const AImageCols, AImageRows, ACharMargin, ACharDisplayMargin: Integer);
	procedure PrepareResources; override;
	procedure Print(const X, Y: Single; const Color: TCastleColor; const S: string); override;
	function TextWidth(const S: string): Single; override;
	function TextHeight(const S: string): Single; override;
	function TextHeightBase(const S: string): Single; override;
	function TextMove(const S: string): TVector2; override;

Description

Methods

	constructor Create(AOwner: TComponent); override;

	destructor Destroy; override;

	procedure Load(AImage: TCastleImage; const AImageCols, AImageRows, ACharMargin, ACharDisplayMargin: Integer);
Load font from given image. Parameters AImage Image data, becomes owned by this class. ACharMargin There is a margin in the image between rows and cols. ACharDisplayMargin We can display some spacing between characters. This is independent from CharMargin and image contents.

	procedure PrepareResources; override;

	procedure Print(const X, Y: Single; const Color: TCastleColor; const S: string); override;

	function TextWidth(const S: string): Single; override;

	function TextHeight(const S: string): Single; override;

	function TextHeightBase(const S: string): Single; override;

	function TextMove(const S: string): TVector2; override;

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