53 lines
1.2 KiB
Go
53 lines
1.2 KiB
Go
package render
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import (
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"image"
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"git.kirsle.net/go/render/event"
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)
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// Engine is the interface for the rendering engine, keeping SDL-specific stuff
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// far away from the core of Doodle.
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type Engine interface {
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Setup() error
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// Poll for events like keypresses and mouse clicks.
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Poll() (*event.State, error)
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GetTicks() uint32
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WindowSize() (w, h int)
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// Present presents the current state to the screen.
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Present() error
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// Clear the full canvas and set this color.
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Clear(Color)
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SetTitle(string)
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DrawPoint(Color, Point)
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DrawLine(Color, Point, Point)
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DrawRect(Color, Rect)
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DrawBox(Color, Rect)
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DrawText(Text, Point) error
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ComputeTextRect(Text) (Rect, error)
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// Texture caching.
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StoreTexture(name string, img image.Image) (Texturer, error)
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LoadTexture(name string) (Texturer, error)
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Copy(t Texturer, src, dst Rect)
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// Delay for a moment using the render engine's delay method,
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// implemented by sdl.Delay(uint32)
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Delay(uint32)
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// Tasks that the Setup function should defer until tear-down.
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Teardown()
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Loop() error // maybe?
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}
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// Texturer is a stored image texture used by the rendering engine while
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// abstracting away its inner workings.
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type Texturer interface {
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Size() Rect
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Image() image.Image
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}
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