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examples/font: Reimplement DrawTextOnImage for examples/keybaord/keybaord

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This commit is contained in:
Hajime Hoshi 2017-05-28 03:01:49 +09:00
parent 522ec0c1bf
commit 7773aff3f7
1 changed files with 36 additions and 7 deletions
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43
examples/common/font.go
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@ -19,7 +19,7 @@ package common
import ( import (
"image" "image"
"image/color" "image/color"
//"image/draw" "image/draw"
"math" "math"
"github.com/hajimehoshi/ebiten" "github.com/hajimehoshi/ebiten"
@ -55,6 +55,32 @@ func init() {
ArcadeFont = &Font{eimg, img, 32, 16, 8, 8} ArcadeFont = &Font{eimg, img, 32, 16, 8, 8}
} }
type part struct {
sx, sy, dx0, dy0, dx1, dy1 int
}
func (f *Font) parts(str string) []part {
ps := []part{}
x := 0
y := 0
for _, c := range str {
if c == '\n' {
x = 0
y += f.charHeight
continue
}
sx := (int(c) % f.charNumPerLine) * f.charWidth
sy := ((int(c) - f.offset) / f.charNumPerLine) * f.charHeight
dx0 := x
dy0 := y
dx1 := dx0 + f.charWidth
dy1 := dy0 + f.charHeight
ps = append(ps, part{sx, sy, dx0, dy0, dx1, dy1})
x += f.charWidth
}
return ps
}
func (f *Font) DrawText(rt *ebiten.Image, str string, ox, oy, scale int, c color.Color) { func (f *Font) DrawText(rt *ebiten.Image, str string, ox, oy, scale int, c color.Color) {
op := &ebiten.DrawImageOptions{} op := &ebiten.DrawImageOptions{}
ur, ug, ub, ua := c.RGBA() ur, ug, ub, ua := c.RGBA()
@ -70,6 +96,7 @@ func (f *Font) DrawText(rt *ebiten.Image, str string, ox, oy, scale int, c color
} }
op.ColorM.Scale(r, g, b, a) op.ColorM.Scale(r, g, b, a)
// TODO: There is same logic in parts. Refactor this.
x := 0 x := 0
y := 0 y := 0
for _, c := range str { for _, c := range str {
@ -91,13 +118,15 @@ func (f *Font) DrawText(rt *ebiten.Image, str string, ox, oy, scale int, c color
} }
} }
/*func (f *Font) DrawTextOnImage(rt draw.Image, str string, ox, oy int) { func (f *Font) DrawTextOnImage(rt draw.Image, str string, ox, oy int) {
for i := 0; i < parts.Len(); i++ { // TODO: This function is needed only by examples/keyboard/keyboard.
dx0, dy0, dx1, dy1 := parts.Dst(i) // This is executed without Ebiten, so ebiten.Image can't be used.
sx0, sy0, _, _ := parts.Src(i) // When ebiten.Image can be used without ebiten.Run, this function can be removed.
draw.Draw(rt, image.Rect(dx0+ox, dy0+oy, dx1+ox, dy1+oy), f.origImage, image.Pt(sx0, sy0), draw.Over) for _, p := range f.parts(str) {
draw.Draw(rt, image.Rect(p.dx0+ox, p.dy0+oy, p.dx1+ox, p.dy1+oy),
f.origImage, image.Pt(p.sx, p.sy), draw.Over)
} }
}*/ }
func (f *Font) DrawTextWithShadow(rt *ebiten.Image, str string, x, y, scale int, clr color.Color) { func (f *Font) DrawTextWithShadow(rt *ebiten.Image, str string, x, y, scale int, clr color.Color) {
f.DrawText(rt, str, x+1, y+1, scale, color.NRGBA{0, 0, 0, 0x80}) f.DrawText(rt, str, x+1, y+1, scale, color.NRGBA{0, 0, 0, 0x80})