RXGDUTIL - Rexx extensions to support building GIF files

RXGDUTIL is an REXX extension with functions to build GIF files with REXX programs.

The DLL contains the following functions:

RxgdImageCreate(x,y)

Create an image in memory
RxgdImageCreateFromGIF(filename)
Create an image from a GIF file
RxgdImageDestroy(im)
Release the Image from Memory
RxgdImageGIF(filename)
Write a GIF file from Memory to a flat file
RxgdImageSetPixel(im, x, y, color)
Set a specific Pixel to a color index
RxgdImageLine(im, x1, y1, x2, y2, color) (correct syntax in v3.10)
Draw a line between two end points
RxgdImagePolygon(im, points, pointsTotal, color)
Draw a poloygon with the verticies (at least 3)
RxgdImageFilledPolygon(im, points, pointsTotal Color)
Draw a Poloygon with the Verticies and fill it with the color
RxgdImageRectangle(im, x1, y1, x2, y2, color)
Draw a rectangle with the two corners (upper left first, then lower right)
RxgdImageFilledRectangle(im, x1, y1, x2, y2, color)
Draw a rectangle with the two corners (upper left first, then lower right) and fill it with the color
RxgdImageArc(im, cx, cy, w, h, s, e, color)
Draw and ARC or CIRCLE with the given points
RxgdImageFillToBorder(im, x, y, border, color)
Flood a portion of the image with the specified color
RxgdImageFill(im, x, y, color)
Floods a portion of the image with the specified color
brush=RxgdImageSetBrush(im, imbrush)
Allow you to use another image as a brush to paint a whole picture at once
tile=RxgdImageSetTile(im, imtile)
Allow you to use another image to tile the GIF image
style=RxgdImageSetStyle(im, stylestem, styleLength)
Allows you to specify pixels for drawing dashed lines and other colorful stuff
stylebrush=RxgdImageGetStyleBrushed(im)
Allows you to get the Styled Brushed image handle
blue=RxgdImageBlue(im, color)
Retrieves the BLUE portion of the color index
red=RxgdImageRed(im, color)
Retrieves the RED portion of the color index
green=RxgdImageGreen(im, color)
Retrieves the GREEN portion of the color index
pixel=RxgdImageGetPixel(im, x, y)
Retrieve the Color Index of the pixel
sx=RxgdImageSX(im)
Retrieve the X & Y size of the Image
sy=RxgdImageSY(im)
Retrieve the X & Y size of the Image
RxgdImageString(im, font, x, y, s, color)
Print some text onto the GIF file at the specified location
RxgdImageStringUp(im, font, x, y, s, color)
Print some text rotated at 90 degrees onto the GIF file at the specified location
color=RxgdImageColorAllocate(im, r, g, b)
Allocate the first available color index in the image with the specified color, if the (256) color table is full this will return -1
color=RxgdImageColorClosest(im, r, g, b)
Find a color in the color table that is closest to the colors specified
color=RxgdImageColorExact(im, r, g, b)
Find a color in the color table that is an exact match to the colors specified
total=RxgdImageColorsTotal(im)
Return the number of colors in the color table
interlace=RxgdImageGetInterlaced(im)
Return if the image is interlaced or not
RxgdImageInterlaced(im, interlace)
Return if the image is interlaced or not
color=RxgdImageGetTransparent(im)
Return the color index of the transparent color
RxgdImageColorTransparent(im, color)
Return the color index of the transparent color
RxgdImageColorDeallocate(im, color)
Remove a color from the color table and leave the entry as usable
RxgdImageCopy(imdest, imsrc, destX, destY, srcX, srcY, w, h)
Copy a rectangular portion of one image to another image
RxgdImageCopyResized(imdest, imsrc, destX, destY, srcX, srcY, destW, destH, srcW, srcH)
Copy a rectangular portion of one image to another image. The destination region can vary, resulting in stretching or shrinking the size of the image

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