mirror of https://github.com/liamg/aminal.git
76 lines
1.9 KiB
Go
76 lines
1.9 KiB
Go
package terminal
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import (
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"fmt"
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"image"
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"image/draw"
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"math"
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"strings"
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"github.com/liamg/aminal/sixel"
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)
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func sixelHandler(pty chan rune, terminal *Terminal) error {
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data := []rune{}
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for {
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b := <-pty
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if b == 0x1b { // terminated by ESC bell or ESC \
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t := <-pty
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if t != 0x07 && t != 0x5c {
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return fmt.Errorf("Incorrect terminator in sixel sequence: 0x%02X [%c]", t, t)
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}
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break
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}
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if b >= 33 {
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data = append(data, b)
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}
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}
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six, err := sixel.ParseString(string(data))
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if err != nil {
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return fmt.Errorf("Failed to parse sixel data: %s", err)
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}
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originalImage := six.RGBA()
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w := originalImage.Bounds().Size().X
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h := originalImage.Bounds().Size().Y
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x, y := terminal.ActiveBuffer().CursorColumn(), terminal.ActiveBuffer().CursorLine()
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fromBottom := int(terminal.ActiveBuffer().ViewHeight() - y)
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lines := int(math.Ceil(float64(h) / float64(terminal.charHeight)))
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if fromBottom < lines+2 {
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y -= (uint16(lines+2) - uint16(fromBottom))
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}
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for l := 0; l <= int(lines); l++ {
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terminal.ActiveBuffer().Write([]rune(strings.Repeat(" ", int(terminal.ActiveBuffer().ViewWidth())))...)
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terminal.ActiveBuffer().NewLine()
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}
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cols := int(math.Ceil(float64(w) / float64(terminal.charWidth)))
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for offsetY := 0; offsetY < lines-1; offsetY++ {
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for offsetX := 0; offsetX < cols-1; offsetX++ {
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cell := terminal.ActiveBuffer().GetCell(x+uint16(offsetX), y+uint16((lines-2)-offsetY))
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if cell == nil {
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continue
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}
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img := originalImage.SubImage(image.Rect(
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offsetX*int(terminal.charWidth),
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offsetY*int(terminal.charHeight),
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(offsetX*int(terminal.charWidth))+int(terminal.charWidth),
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(offsetY*int(terminal.charHeight))+int(terminal.charHeight),
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))
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rgba := image.NewRGBA(image.Rect(0, 0, int(terminal.charWidth), int(terminal.charHeight)))
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draw.Draw(rgba, rgba.Bounds(), img, img.Bounds().Min, draw.Src)
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cell.SetImage(rgba)
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}
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}
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return nil
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}
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