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# JGBKFont Class Reference

`#include <JGBKFont.h>`

Collaboration diagram for JGBKFont:

List of all members.

## Public Member Functions
| JGBKFont ()
bool | Init (const char *engFileName, const char *chnFileName, int fontsize=16, bool smallEnglishFont=false)
int | PreCacheChar (const BYTE *ch)
int | PrepareString (BYTE *str, int *dest)
void | RenderEncodedString (const int *text, int count, float x, float y)
void | RenderString (BYTE *str, float x, float y, int alignment=JGETEXT_LEFT)
void | SetScale (float scale)
void | SetRotation (float rot)
void | SetColor (PIXEL_TYPE color)
void | SetBgColor (PIXEL_TYPE color)

## Detailed Description

Chinese bitmap font encoded with GBK encoding. All popurlar font sizes are supported and the following have been tested: 12x12, 16x16, 18x18, 20x20, 24x24, 28x28 and 32x32.

## Constructor & Destructor Documentation

JGBKFont::JGBKFont | ( |  | ) |

Constructor.

## Member Function Documentation

bool JGBKFont::Init | ( | const char * | engFileName,
|  | const char * | chnFileName,
|  | int | fontsize = `16`,
|  | bool | smallEnglishFont = `false` |
| ) |  |  |

Initialization of the font class. You need to provide both a Chinese font file and an English one as well.

For example:

                    mChineseFont = new JGBKFont();
                    mChineseFont->Init("Res/ASC16", "Res/GBK16");

Parameters:

  | engFileName | - Name of the English font file.
  | chnFileName | - Name of the Chinese font file.
  | fontsize | - Font size.
  | smallEnglishFont | - Indicate to use half width when rendering English characters.

int JGBKFont::PreCacheChar | ( | const BYTE * | ch | ) |

Rendering character into cache.

Parameters:

  | ch | - Single byte or word of character code.

Returns:
  Index of the character in cache.

int JGBKFont::PrepareString | ( | BYTE * | str,
|  | int * | dest |
| ) |  |  |

Scan through the string and look up the index of each character in the cache and then return all indexes in an array to be rendered later on.

Parameters:

  | str | - String to look for cache indexes.

Returns:
  dest - Indexes of characters in cache.

  Number of characters processed.

void JGBKFont::RenderEncodedString | ( | const int * | text,
|  | int | count,
|  | float | x,
|  | float | y |
| ) |  |  |

Render string by using the indexes returned from PrepareString.

Parameters:

  | text | - Cache indexes for rendering.
  | count | - Number of characters to render.
  | x | - X screen position for rendering.
  | y | - Y screen position for rendering.

void JGBKFont::RenderString | ( | BYTE * | str,
|  | float | x,
|  | float | y,
|  | int | alignment = `JGETEXT_LEFT` |
| ) |  |  |

Render string to screen.

Parameters:

  | str | - String to render.
  | x | - X screen position for rendering.
  | y | - Y screen position for rendering.

void JGBKFont::SetScale | ( | float | scale | ) |

Set scale for rendering.

Parameters:

  | scale | - Scale for rendering characters.

void JGBKFont::SetRotation | ( | float | rot | ) |

Set angle for rendering.

Parameters:

  | rot | - Rotation angle in radian.

void JGBKFont::SetColor | ( | PIXEL_TYPE | color | ) |

Set font color.

Parameters:

  | color | - color of font.

void JGBKFont::SetBgColor | ( | PIXEL_TYPE | color | ) |

Set background color.

Parameters:

  | color | - Background color.