78 lines
1.4 KiB
Go
78 lines
1.4 KiB
Go
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package canvas
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import (
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"time"
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"git.kirsle.net/apps/doodle/lib/events"
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"git.kirsle.net/apps/doodle/lib/render"
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)
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// Engine implements a rendering engine targeting an HTML canvas for
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// WebAssembly targets.
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type Engine struct {
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canvas Canvas
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startTime time.Time
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width int
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height int
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ticks uint32
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// Private fields.
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events *events.State
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running bool
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}
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// New creates the Canvas Engine.
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func New(canvasID string) (*Engine, error) {
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canvas := GetCanvas(canvasID)
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engine := &Engine{
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canvas: canvas,
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startTime: time.Now(),
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events: events.New(),
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width: canvas.ClientW(),
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height: canvas.ClientH(),
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}
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return engine, nil
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}
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// WindowSize returns the size of the canvas window.
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func (e *Engine) WindowSize() (w, h int) {
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return e.canvas.ClientW(), e.canvas.ClientH()
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}
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// GetTicks returns the current tick count.
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func (e *Engine) GetTicks() uint32 {
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return e.ticks
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}
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// TO BE IMPLEMENTED...
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func (e *Engine) Setup() error {
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return nil
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}
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func (e *Engine) Present() error {
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return nil
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}
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func (e *Engine) NewBitmap(filename string) (render.Texturer, error) {
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return nil, nil
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}
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func (e *Engine) Copy(t render.Texturer, src, dist render.Rect) {
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}
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// Delay for a moment.
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func (e *Engine) Delay(delay uint32) {
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time.Sleep(time.Duration(delay) * time.Millisecond)
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}
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// Teardown tasks.
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func (e *Engine) Teardown() {}
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func (e *Engine) Loop() error {
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return nil
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}
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