Playing with the ming API , a C library for SWF/Flash.My notebook.

Ming is a C library generating some simple Flash/SWF movies. In this post I will describe how I used the Ming API by try to converting to SWF the SVG that was generated in a previous post
Genetic Algorithm with Darwin's Face: Dynamic SVG

The original SVG file

The original SVG file looks like this:

<?xml version="1.0"?>
<svg:svg xmlns:svg="http://www.w3.org/2000/svg" version="1.1" width="160" height="222" style="stroke: none;" viewBox="0 0 160 222">
<svg:g id="face">
<svg:polygon points="110,193 11,320 -67,164" style="fill: rgb(129, 82, 122); opacity: 0.68;"/>
<svg:polygon points="109,30 224,181 -4,-1" style="fill: rgb(213, 113, 17); opacity: 0.52;"/>
<svg:polygon points="128,105 101,0 209,-75" style="fill: rgb(200, 91, 58); opacity: 0.04;"/>
<svg:polygon points="115,183 169,232 193,-29" style="fill: rgb(185, 133, 125); opacity: 0.9;"/>
<svg:polygon points="68,186 47,39 57,30" style="fill: rgb(249, 68, 34); opacity: 0.62;"/>
<svg:polygon points="80,185 108,123 158,131" style="fill: rgb(62, 181, 169); opacity: 0.56;"/>
<svg:polygon points="110,61 211,-86 115,217" style="fill: rgb(10, 46, 216); opacity: 0.86;"/>
<svg:polygon points="115,183 169,232 192,-27" style="fill: rgb(188, 127, 122); opacity: 0.9;"/>
<svg:polygon points="78,197 205,135 85,178" style="fill: rgb(53, 145, 210); opacity: 0.6;"/>
<svg:polygon points="108,64 211,-81 111,220" style="fill: rgb(10, 46, 216); opacity: 0.46;"/>
<svg:polygon points="110,59 210,-88 116,215" style="fill: rgb(10, 46, 216); opacity: 0.86;"/>
<svg:polygon points="53,138 60,45 46,60" style="fill: rgb(13, 98, 29); opacity: 0.8;"/>
(...)

A generic C program using the ming API would look like this:

/* initialize ming */
Ming_init();
/* create a movie */
movie=newSWFMovie();
/* set number of frames */
SWFMovie_setNumberOfFrames(movie, NUM_FRAME);
/* loop over the frames */
for(i=0;i<NUM_FRAME;++i)
{
/* create rectange */
rect = newSWFShape();
SWFShape_movePenTo(rect,x,y);
SWFShape_drawLineTo(rect,x+width,y);
SWFShape_drawLineTo(rect,x+width,y+height);
SWFShape_drawLineTo(rect,x,y+height);
SWFShape_drawLineTo(rect,x,y);
/* add figure in the movie */
SWFMovie_add(swf, rect);
(...)
/* add frame */
SWFMovie_nextFrame(movie);
}
/* save movie to file */
WFMovie_save(movie,"file.swf");
/* dispose movie */
destroySWFMovie(movie);

I created a simple C code transforming my SVG to SWF using the ming API. The file contains 5 frames where I slightly moved some shapes. The code was posted on github at: http://github.com/lindenb/ccsandbox/blob/master/src/svg2swf.c.

Compile & run:

export LD_LIBRARY_PATH=${ming.lib.dir}
gcc -L ${ming.lib.dir} -I ${ming.include.dir} `xml2-config --cflags ` svg2swf.c -lming `xml2-config --libs `
./a.out -o darwin.swf darw.svg

Result

(also posted on OWW)

That's it
Pierre