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Draw background color in window

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This commit is contained in:
Sasha Koshka 2022-11-10 20:43:27 -05:00
parent 1afbcdb6bc
commit d26845a4d6
1 changed files with 40 additions and 23 deletions
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63
backends/x/x.go
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@ -32,6 +32,8 @@ type Backend struct {
font struct {
face font.Face
}
colors [4]xgraphics.BGRA
metrics struct {
windowWidth int
@ -134,20 +136,7 @@ func (backend *Backend) handleXEvent (event xgb.Event) {
backend.compressConfigureNotify(configureEvent)
// resize and rebind canvas
backend.canvas.Destroy()
backend.canvas = xgraphics.New (
backend.connection,
image.Rect (
0, 0,
backend.metrics.windowWidth,
backend.metrics.windowHeight))
// FIXME (?): this doesn't work. if it were to work, it
// would possibly be a cleaner way to resize the canvas.
// backend.canvas.Scale (
// backend.metrics.windowWidth,
// backend.metrics.windowHeight)
backend.drawRune(8, 16, 'X')
backend.bindCanvas()
backend.reallocateCanvas()
}
}
}
@ -193,14 +182,32 @@ func (backend *Backend) calculateWindowSize () (x, y int) {
return
}
func (backend *Backend) bindCanvas () {
func (backend *Backend) reallocateCanvas () {
if backend.canvas != nil {
backend.canvas.Destroy()
}
backend.canvas = xgraphics.New (
backend.connection,
image.Rect (
0, 0,
backend.metrics.windowWidth,
backend.metrics.windowHeight))
backend.canvas.For (func (x, y int) xgraphics.BGRA {
return backend.colors[stone.ColorApplication]
})
// FIXME (?): this doesn't work. if it were to work, it
// would possibly be a cleaner way to resize the canvas.
// backend.canvas.Scale (
// backend.metrics.windowWidth,
// backend.metrics.windowHeight)
backend.drawRune(8, 16, 'X')
backend.canvas.XSurfaceSet(backend.window.Id)
backend.canvas.XDraw()
backend.canvas.XPaint(backend.window.Id)
}
func (backend *Backend) drawRune (x, y int, character rune) {
// bounds, image, point, _, _ :=
}
// factory instantiates an X backend.
@ -214,6 +221,22 @@ func factory (application *stone.Application) (output stone.Backend, err error)
// TODO: load this from a file
backend.font.face = basicfont.Face7x13
// pre-calculate colors
for index := 0; index < len(backend.colors); index ++ {
color := backend.config.Color(stone.Color(index))
r, g, b, a := color.RGBA()
r >>= 8
g >>= 8
b >>= 8
a >>= 8
backend.colors[index] = xgraphics.BGRA {
R: uint8(r),
G: uint8(g),
B: uint8(b),
A: uint8(a),
}
}
// calculate metrics
metrics := backend.font.face.Metrics()
glyphAdvance, _ := backend.font.face.GlyphAdvance('M')
@ -246,13 +269,7 @@ func factory (application *stone.Application) (output stone.Backend, err error)
backend.SetIcon(application.Icon())
// create a canvas
backend.canvas = xgraphics.New (
backend.connection,
image.Rect (
0, 0,
backend.metrics.windowWidth,
backend.metrics.windowHeight))
backend.bindCanvas()
backend.reallocateCanvas()
// attatch graceful close handler
backend.window.WMGracefulClose (func (window *xwindow.Window) {