Grid draws the glyphs inside of cells
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1616c615bf
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643bbf1116
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@ -1,10 +1,12 @@
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package elements
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import "image"
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import "unicode"
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import "image/color"
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import "golang.org/x/image/font"
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import "git.tebibyte.media/sashakoshka/tomo"
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import "git.tebibyte.media/sashakoshka/tomo/input"
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import "git.tebibyte.media/sashakoshka/tomo/fixedutil"
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import "git.tebibyte.media/sashakoshka/tomo/artist/shapes"
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import "git.tebibyte.media/sashakoshka/tomo/default/theme"
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import "git.tebibyte.media/sashakoshka/tomo/default/config"
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@ -46,6 +48,7 @@ type Grid struct {
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ignorePush bool
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ascent int
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face font.Face
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config config.Wrapped
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theme theme.Wrapped
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@ -195,6 +198,7 @@ func (element *Grid) updateFontAndColors () {
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metrics := element.face.Metrics()
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element.cellWidth = emSpace.Round()
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element.cellHeight = metrics.Height.Round()
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element.ascent = metrics.Ascent.Round()
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for index := range element.colors {
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element.colors[index] = element.theme.Color (
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@ -243,16 +247,18 @@ func (element *Grid) bound (index int) image.Rectangle {
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}
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}
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func (element *Grid) draw (force bool) image.Rectangle {
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func (element *Grid) draw (force bool) (updatedRegion image.Rectangle) {
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bounds := element.Bounds()
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for index, cell := range element.cells {
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if force || !cell.clean {
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// TODO
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cellBounds := element.bound(index)
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updatedRegion = updatedRegion.Union(cellBounds)
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shapes.FillColorRectangle (
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element.core,
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element.colors[cell.Background],
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element.bound(index))
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cellBounds)
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element.drawCellGlyph(cellBounds, cell.Cell)
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}}
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if force {
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@ -262,5 +268,49 @@ func (element *Grid) draw (force bool) image.Rectangle {
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bounds, element.gridBounds)
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}
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return bounds // FIXME
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return
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}
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func (element *Grid) drawCellGlyph (cellBounds image.Rectangle, cell Cell) {
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if cell.Rune < 32 || unicode.IsSpace(cell.Rune) { return }
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glyphColor := element.colors[cell.Foreground]
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destinationRectangle, mask, maskPoint, _, ok := element.face.Glyph (
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fixedutil.Pt(cellBounds.Min),
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cell.Rune)
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if !ok {
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// tofu
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shapes.StrokeColorRectangle (
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element.core, glyphColor, cellBounds.Inset(1), 1)
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return
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}
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maxX := destinationRectangle.Dx()
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maxY := destinationRectangle.Dy()
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data, stride := element.core.Buffer()
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for y := 0; y < maxY; y ++ {
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for x := 0; x < maxX; x ++ {
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_, _, _,
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alpha := mask.At(x + maskPoint.X, y + maskPoint.Y).RGBA()
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dstX := x + destinationRectangle.Min.X
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dstY := y + destinationRectangle.Min.Y + element.ascent
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dstIndex := dstX + dstY * stride
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data[dstIndex] = blend (
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data[dstIndex],
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glyphColor,
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float64(alpha) / 0xFFFF)
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}}
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}
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func blend (bottom, top color.RGBA, fac float64) color.RGBA {
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return color.RGBA {
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R: uint8(float64(bottom.R) * (1 - fac) + float64(top.R) * fac),
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G: uint8(float64(bottom.G) * (1 - fac) + float64(top.G) * fac),
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B: uint8(float64(bottom.B) * (1 - fac) + float64(top.B) * fac),
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A: 0xFF,
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}
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}
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@ -25,11 +25,11 @@ func (element *Terminal) handleResize () {
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element.Set(image.Pt(0, 0), Cell {
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Rune: 'X',
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Background: tomo.ColorRed,
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Foreground: tomo.ColorBlack,
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Foreground: tomo.ColorBrightWhite,
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})
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element.Set(image.Pt(15, 10), Cell {
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Rune: 'Y',
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Background: tomo.ColorBrightBlue,
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Background: tomo.ColorBrightYellow,
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Foreground: tomo.ColorBlack,
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})
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}
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