TextRenderer¶

constructor¶

TextRenderer()

The constructor initalizes all members.

destructor¶

~TextRenderer()

The dertructor frees allocate cairo resources.

init¶

int init(int iW, int iH);

iW

Width of backgtoundd.

`` iH``

Height of background

Creates a cairo surface sized iW x iH and a cairo context for it.

setFontSize¶

void setFontSize(double dSize);

dSize

The new font size, in user space units.

Sets font size.

setColor¶

void setColor(double dR, double dG, double dB, double dA);

dR

Red component of color.

dG

Green component of color.

dB

Blue component of color.

dA

Alpha component of color.

Sets the foreground color .. —————————————————————————–

addText¶

void addText(const char *pText, double dX, double dY);

pText

Text to be written.

dX

X-coordinate of lower left corner of text rectangle.

dY

Y-coordinate of lower left corner of text rectangle.

Writes the given text into the cairo context at the spüecified position.

createData¶

uchar **createData();

Creates an unsigned char RGB array with PNG-compatible structure. It is the caller’s responsability to delete this array properly (with deleteArray()).

writeToPNG¶

int writeToPNG(const char *pOut);

pOut

Name of output PÜNG file.

Creates a PNG file from the data in the cairo context.

getExt¶

void getExt(const char *pText, int &iExtW, int &iExtH);

pText

Text to get the extents of.

iExtW

Reference to integer for holding the width of the textrectangle.

iExtH

Reference to integer for holding the width of the textrectangle.

deleteArray()¶

void deleteArray(uchar **ppData);

ppData

Array of unsigend char created by createData .

Properly deletes the specified array.