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v0.1.1 true color extracted to a standalone package, lut256 lazy build

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lixen
2026-07-14 13:04:27 -04:00
parent aa22225c61
commit 21041633b2
33 changed files with 480 additions and 745 deletions
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output.go
+11 -9
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@@ -2,6 +2,8 @@ package terminal
import (
"bufio"
"github.com/lixenwraith/color"
)
// outputBuffer manages double-buffered terminal output with diffing
@@ -17,8 +19,8 @@ type outputBuffer struct {
cursorValid bool
// Style state for coalescing
lastFg RGB
lastBg RGB
lastFg color.RGB
lastBg color.RGB
lastAttr Attr
lastValid bool
}
@@ -251,7 +253,7 @@ func (o *outputBuffer) moveCursorTo(w *bufio.Writer, x, y int) {
}
// writeStyleCoalesced emits a single combined SGR sequence when style changes
func (o *outputBuffer) writeStyleCoalesced(w *bufio.Writer, fg, bg RGB, attr Attr) {
func (o *outputBuffer) writeStyleCoalesced(w *bufio.Writer, fg, bg color.RGB, attr Attr) {
// Check what changed
fgChanged := !o.lastValid || fg != o.lastFg || (attr&AttrFg256) != (o.lastAttr&AttrFg256)
bgChanged := !o.lastValid || bg != o.lastBg || (attr&AttrBg256) != (o.lastAttr&AttrBg256)
@@ -340,7 +342,7 @@ func (o *outputBuffer) writeStyleCoalesced(w *bufio.Writer, fg, bg RGB, attr Att
}
// writeFgInline writes fg color parameters (no CSI prefix, no 'm' suffix)
func (o *outputBuffer) writeFgInline(w *bufio.Writer, fg RGB, attr Attr) {
func (o *outputBuffer) writeFgInline(w *bufio.Writer, fg color.RGB, attr Attr) {
w.WriteByte(';')
if attr&AttrFg256 != 0 {
// 256-color: 38;5;N
@@ -362,7 +364,7 @@ func (o *outputBuffer) writeFgInline(w *bufio.Writer, fg RGB, attr Attr) {
}
// writeBgInline writes bg color parameters (no CSI prefix, no 'm' suffix)
func (o *outputBuffer) writeBgInline(w *bufio.Writer, bg RGB, attr Attr) {
func (o *outputBuffer) writeBgInline(w *bufio.Writer, bg color.RGB, attr Attr) {
w.WriteByte(';')
if attr&AttrBg256 != 0 {
// 256-color: 48;5;N
@@ -384,7 +386,7 @@ func (o *outputBuffer) writeBgInline(w *bufio.Writer, bg RGB, attr Attr) {
}
// writeFgFull writes complete fg color sequence
func (o *outputBuffer) writeFgFull(w *bufio.Writer, fg RGB, attr Attr) {
func (o *outputBuffer) writeFgFull(w *bufio.Writer, fg color.RGB, attr Attr) {
if attr&AttrFg256 != 0 {
w.Write(csiFg256)
writeInt(w, int(fg.R))
@@ -405,7 +407,7 @@ func (o *outputBuffer) writeFgFull(w *bufio.Writer, fg RGB, attr Attr) {
}
// writeBgFull writes complete bg color sequence
func (o *outputBuffer) writeBgFull(w *bufio.Writer, bg RGB, attr Attr) {
func (o *outputBuffer) writeBgFull(w *bufio.Writer, bg color.RGB, attr Attr) {
if attr&AttrBg256 != 0 {
w.Write(csiBg256)
writeInt(w, int(bg.R))
@@ -435,7 +437,7 @@ func (o *outputBuffer) forceFullRedraw() {
}
// clear writes a clear screen with specified background
func (o *outputBuffer) clear(bg RGB) {
func (o *outputBuffer) clear(bg color.RGB) {
w := o.writer
w.Write(csiSGR0)
o.writeBgFull(w, bg, 0)
@@ -453,4 +455,4 @@ func (o *outputBuffer) clear(bg RGB) {
// invalidateCursor marks cursor position as unknown
func (o *outputBuffer) invalidateCursor() {
o.cursorValid = false
}
}