Overview of PHP GD library functions_PHP tutorial

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GetImageSize
Function: Get the size of the image [i.e. length and width]
PHP GD library function usage: array GetImageSize(string filename, array [imageinfo]);

ImageArc
Function: draw arc
Usage: int ImageArc(int im, int cx, int cy, int w, int h, int s, int e, int col);

ImageChar
Function: write horizontal characters
PHP GD library function usage: int ImageChar(int im, int font, int x, int y, string c, int col);

ImageCharUp
Function: Write vertical characters
Usage: int ImageCharup(int im, int font, int x, int y, string c, int col);

ImageColorAllocate
Function: Match colors
PHP GD library function usage: int ImageColorAllocate(int im, int red, int green, int blue);

ImageColorTransparent
Function: Specify transparency Background color
Usage: int ImageColorTransparent(int im, int [col]);

ImageCopyResized
Function: Copy new image and resize
PHP GD library function usage: int ImageCopyResized(int dst_im, int src_im, int dstX, int dstY, int srcX, int srcY, int dstW, int dstH, int srcW, int srcH);

ImageCreate
Function: Create a new image
Usage: int ImageCreate(int x_size, int y_size);

ImageDashedLine
Function: Draw a dotted line
Usage: int ImageDashedLine(int im, int x1, int y1, int x2, int y2, int col) ;

ImageDestroy
PHP GD library function function: end graphics
Usage explanation: int ImageDestroy(int im);

ImageFill
Function: graphics coloring
Usage ：int ImageFill(int im, int x, int y, int col);

ImageFilledPolygon
Function: polygon area coloring
PHP GD library function usage: int ImageFilledPolygon(int im, array points, int num_points, int col);

ImageFilledRectangle
Function: Rectangular area coloring
Usage: int ImageFilledRectangle(int im, int x1, int y1, int x2, int y2, int col);

ImageFillToBorder
Function: Coloring within the specified color area
PHP GD library function usage: int ImageFillToBorder(int im, int x, int y, int border, int col);

ImageFontHeight
Function: Get the height of the font
Usage: int ImageFontHeight(int font);

ImageFontWidth
Function: Get the width of the font
Usage: int ImageFontWidth(int font ; >Function: Draw a solid line

Usage: int ImageLine(int im, int x1, int y1, int x2, int y2, int col);

ImageLoadFont
Function: Load bitmap fonts Type

Usage: int ImageLoadFont(string file);

ImagePolygon
Function: draw polygons

Usage: int ImagePolygon(int im, array points, int num_points, int col);

ImageRectangle
Function: Draw a rectangle

Usage: int ImageRectangle(int im, int x1, int y1, int x2, int y2, int col);

ImageSetPixel
Function : Draw points

PHP GD library function usage: int ImageSetPixel(int im, int x, int y, int col);

ImageString
Function: Draw horizontal string

Usage: int ImageString(int im, int font, int x, int y, string s, int col);

ImageStringUp
Function: Draw a straight string

Usage: int ImageStringUp(int im, int font, int x, int y, string s, int col);

ImageSX
Function: Get the width of the image

Usage: int ImageSX(int im);

ImageSY
Function: Get the height of the image

PHP GD library function usage: int ImageSY(int im);

ImageTTFBBox
Function: Calculate the area occupied by TTF text

Usage: array ImageTTFBBox(int ​​size, int angle, string fontfile, string text);

ImageTTFText
Function: Write TTF text into the image

Usage: array ImageTTFText(int im, int size, int angle, int x, int y, int col, string fontfile, string text);

ImageColorAt
Function: Get the index value of the color of the specified point in the picture

Usage: int ImageColorAt(int im, int x , int y);

ImageColorClosest
Function: Calculate the closest color to the specified color in the color table

PHP GD library function usage: int ImageColorClosest(int im, int red, int green, int blue );

ImageColorExact
Function: Calculate the specified color index value on the color table

Usage: int ImageColorExact(int im, int red, int green, int blue);

ImageColorResolve
Function: Calculate the index value of the specified or closest color on the color table

Usage: int ImageColorResolve(int im, int red, int green, int blue);

ImageColorSet
Function: Set the color of the specified index on the color table

Usage: boolean ImageColorSet(int im, int index, int red, int green, int blue);

ImageColorsForIndex
Function: Get the specified color table Indexed colors

PHP GD library function usage: array ImageColorsForIndex(int ​​im, int index);

ImageColorsTotal
Function: Calculate the number of colors in the image

Usage: int ImageColorsTotal(int im) ;

ImagePSLoadFont
Function: Load PostScript font

Usage: int ImagePSLoadFont(string filename);

ImagePSFreeFont
Function: Unload PostScript font

Usage: void ImagePSFreeFont(int fontindex);

ImagePSEncodeFont
Function: Convert PostScript fonts into vector words
PHP GD library function usage: int ImagePSEncodeFont(string encodingfile);

ImagePSText
Function: Write PostScript text into the image
Usage: array ImagePSText(int image, string text, int font, int size, int foreground, int background, int x, int y, int space, int tightness, float angle, int antialias_steps);

ImagePSBBox
Function: Calculate the area occupied by PostScript text
PHP GD library function usage: array ImagePSBBox(string text, int font, int size, int space, int width, float angle);

ImageCreateFromPNG
Function: Take out PNG graphics
Usage: int ImageCreateFromPng(string filename);

ImagePNG
Function: Create PNG graphics
Usage: int ImagePng(int im, string [filename]);

ImageCreateFromGIF
Function: Take out GIF graphics
Usage: int ImageCreateFromGif(string filename);

ImageGIF
Function: Create GIF graphics
PHP GD library function usage: int ImageGif(int im, string [filename]);