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Replaced tomo.Image with tomo.Canvas and tomo.Pattern

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This is the first step in transitioning the API over to the new
design. The new tomo.Canvas interface gives drawing functions
direct access to data buffers and eliminates overhead associated
with calling functions for every pixel.

The entire artist package will be remade around this.
This commit is contained in:
Sasha Koshka
2023-01-14 01:54:57 -05:00
parent babc4a4af8
commit 34bf3038ac
16 changed files with 260 additions and 325 deletions
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60
elements/core/core.go
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@@ -7,7 +7,7 @@ import "git.tebibyte.media/sashakoshka/tomo"
// Core is a struct that implements some core functionality common to most
// widgets. It is meant to be embedded directly into a struct.
type Core struct {
canvas *image.RGBA
canvas tomo.BasicCanvas
parent tomo.Element
metrics struct {
@@ -32,20 +32,19 @@ func (core Core) ColorModel () (model color.Model) {
}
func (core Core) At (x, y int) (pixel color.Color) {
if core.canvas == nil { return color.RGBA { } }
pixel = core.canvas.At(x, y)
return
}
func (core Core) RGBAAt (x, y int) (pixel color.RGBA) {
if core.canvas == nil { return color.RGBA { } }
pixel = core.canvas.RGBAAt(x, y)
return
return core.canvas.At(x, y)
}
func (core Core) Bounds () (bounds image.Rectangle) {
if core.canvas != nil { bounds = core.canvas.Bounds() }
return
return core.canvas.Bounds()
}
func (core Core) Set (x, y int, c color.Color) () {
core.canvas.Set(x, y, c)
}
func (core Core) Buffer () (data []color.RGBA, stride int) {
return core.canvas.Buffer()
}
func (core Core) Selectable () (selectable bool) {
@@ -72,13 +71,12 @@ func (core Core) MinimumSize () (width, height int) {
// be used as a canvas. It must not be directly embedded into an element, but
// instead kept as a private member.
type CoreControl struct {
*image.RGBA
tomo.BasicCanvas
core *Core
}
func (control CoreControl) HasImage () (has bool) {
has = control.RGBA != nil
return
func (control CoreControl) HasImage () (empty bool) {
return !control.Bounds().Empty()
}
func (control CoreControl) Select () (granted bool) {
@@ -98,7 +96,7 @@ func (control CoreControl) SetSelectable (selectable bool) {
}
func (control CoreControl) PushRegion (bounds image.Rectangle) {
control.core.hooks.RunDraw(control.SubImage(bounds).(*image.RGBA))
control.core.hooks.RunDraw(tomo.Cut(control, bounds))
}
func (control CoreControl) PushAll () {
@@ -108,8 +106,8 @@ func (control CoreControl) PushAll () {
func (control *CoreControl) AllocateCanvas (width, height int) {
core := control.core
width, height, _ = control.ConstrainSize(width, height)
core.canvas = image.NewRGBA(image.Rect (0, 0, width, height))
control.RGBA = core.canvas
core.canvas = tomo.NewBasicCanvas(width, height)
control.BasicCanvas = core.canvas
}
func (control CoreControl) SetMinimumSize (width, height int) {
@@ -125,19 +123,17 @@ func (control CoreControl) SetMinimumSize (width, height int) {
// if there is an image buffer, and the current size is less
// than this new minimum size, send core.parent a resize event.
if control.HasImage() {
bounds := control.Bounds()
imageWidth,
imageHeight,
constrained := control.ConstrainSize (
bounds.Dx(),
bounds.Dy())
if constrained {
core.parent.Handle (tomo.EventResize {
Width: imageWidth,
Height: imageHeight,
})
}
bounds := control.Bounds()
imageWidth,
imageHeight,
constrained := control.ConstrainSize (
bounds.Dx(),
bounds.Dy())
if constrained {
core.parent.Handle (tomo.EventResize {
Width: imageWidth,
Height: imageHeight,
})
}
}