016d767c8e
The drawvg filter can draw vector graphics on top of a video, using libcairo. It is enabled if FFmpeg is configured with `--enable-cairo`. The language for drawvg scripts is documented in `doc/drawvg-reference.texi`. There are two new tests: - `fate-filter-drawvg-interpreter` launch a script with most commands, and verify which libcairo functions are executed. - `fate-filter-drawvg-video` render a very simple image, just to verify that libcairo is working as expected. Signed-off-by: Ayose <ayosec@gmail.com>
100 lines
1.5 KiB
Text
100 lines
1.5 KiB
Text
// Script to test how drawvg instructions are translated to cairo functions,
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// for `make fate-filter-drawvg-interpreter`.
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// Comments.
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lineargrad 0 0 1 1
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colorstop 0 red // after a statement
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colorstop
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1 // in the middle of a statement
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blue
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// Constants.
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setlinejoin miter
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setlinecap round
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// if/repeat
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M 0 0
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repeat 10 {
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if (eq(i,3)) { break }
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l (i) (i)
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}
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// User variables.
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setvar foo -1
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setvar bar -2
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lineto foo (bar)
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// Print
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print 1 foo (bar - 2)
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// State
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save
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restore
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// Transformation matrix.
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scale 1
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scalexy 2 3
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translate 4 5
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rotate 6
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resetmatrix
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// Basic shapes
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rect 1 2 3 4
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circle 1 2 3
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roundedrect 100 100 400 400 50
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// Sources
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setcolor #abcdef
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stroke
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lineargrad 0 1 2 3
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colorstop 0 red 1 blue
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stroke
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radialgrad 1 2 3 4 5 6
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repeat 2 { colorstop (i/10) black ((i+1)/10) white }
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stroke
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// Curves. The next line should be compatible with SVG's <path>.
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M 10,50 Q 25,25 40,50 t 30,0 30,0 c 20 50 40 -50 100 0
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// Preserve
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preserve fill
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preserve eofill
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preserve stroke
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preserve clip
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// Fill/clip
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fill eofill
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clip eoclip
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// Dashes
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setdash 1 2 3
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setdashoffset 4
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resetdash
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// Procedures
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setvar a -1
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setvar b -2
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proc f2 a b { M a b break call invalid }
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proc f1 a { call f2 a 2 }
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proc f0 { call f1 1 }
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call f0
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l a b
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// Colors
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setrgba 0.1 0.2 0.3 0.4 fill
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sethsla 100 0.2 0.3 0.4 fill
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defrgba c0 0.5 0.6 0.7 0.8
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defhsla c1 200 0.7 0.8 0.9
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setcolor c0 fill
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setcolor c1 fill
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// Frame metadata
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getmetadata md0 m.a
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getmetadata md1 m.b
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getmetadata md2 m.c
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l md0 (md1 + 1) md2 0
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