95 lines
2.5 KiB
Go
95 lines
2.5 KiB
Go
package render
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import (
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"image/color"
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"github.com/hajimehoshi/ebiten/v2/ebitenutil"
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"github.com/hajimehoshi/ebiten/v2/text"
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imagefont "golang.org/x/image/font"
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)
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func (r *Render) drawRow(viewY int, defaultBackgroundColour color.Color, defaultForegroundColour color.Color) {
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pixelY := r.font.CellSize.Y * viewY
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// draw a default colour background image across the entire row background
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ebitenutil.DrawRect(r.frame, 0, float64(pixelY), float64(r.pixelWidth), float64(r.font.CellSize.Y), defaultBackgroundColour)
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var colour color.Color
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// draw background for each cell in row
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for viewX := uint16(0); viewX < r.buffer.ViewWidth(); viewX++ {
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cell := r.buffer.GetCell(viewX, uint16(viewY))
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pixelX := r.font.CellSize.X * int(viewX)
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if cell != nil {
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colour = cell.Bg()
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}
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if colour == nil {
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colour = defaultBackgroundColour
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}
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ebitenutil.DrawRect(r.frame, float64(pixelX), float64(pixelY), float64(r.font.CellSize.X), float64(r.font.CellSize.Y), colour)
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}
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var useFace imagefont.Face
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var skipRunes int
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// draw text content of each cell in row
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for viewX := uint16(0); viewX < r.buffer.ViewWidth(); viewX++ {
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cell := r.buffer.GetCell(viewX, uint16(viewY))
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// we don't need to draw empty cells
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if cell == nil || cell.Rune().Rune == 0 {
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continue
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}
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colour = cell.Fg()
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if colour == nil {
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colour = defaultForegroundColour
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}
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// pick a font face for the cell
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if !cell.Bold() && !cell.Italic() {
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useFace = r.font.Regular
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} else if cell.Bold() && cell.Italic() {
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useFace = r.font.Italic
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} else if cell.Bold() {
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useFace = r.font.Bold
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} else if cell.Italic() {
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useFace = r.font.Italic
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}
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pixelX := r.font.CellSize.X * int(viewX)
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// underline the cell content if required
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if cell.Underline() {
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underlinePixelY := float64(pixelY + (r.font.DotDepth+r.font.CellSize.Y)/2)
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ebitenutil.DrawLine(r.frame, float64(pixelX), underlinePixelY, float64(pixelX+r.font.CellSize.X), underlinePixelY, colour)
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}
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// strikethrough the cell if required
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if cell.Strikethrough() {
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ebitenutil.DrawLine(
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r.frame,
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float64(pixelX),
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float64(pixelY+(r.font.CellSize.Y/2)),
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float64(pixelX+r.font.CellSize.X),
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float64(pixelY+(r.font.CellSize.Y/2)),
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colour,
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)
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}
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if r.enableLigatures && skipRunes == 0 {
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skipRunes = r.handleLigatures(viewX, uint16(viewY), useFace, colour)
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}
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if skipRunes > 0 {
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skipRunes--
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continue
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}
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// draw the text for the cell
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text.Draw(r.frame, string(cell.Rune().Rune), useFace, pixelX, pixelY+r.font.DotDepth, colour)
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}
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}
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