104 lines
2.3 KiB
Go
104 lines
2.3 KiB
Go
package platform
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import (
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"image/color"
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imgui "github.com/FooSoft/imgui-go"
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"github.com/FooSoft/lazarus/math"
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"github.com/FooSoft/lazarus/platform/imgui_backend"
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"github.com/veandco/go-sdl2/sdl"
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)
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type Window struct {
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sdlWindow *sdl.Window
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sdlGlContext sdl.GLContext
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sdlRenderer *sdl.Renderer
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scene Scene
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}
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func newWindow(title string, width, height int, scene Scene) (*Window, error) {
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sdlWindow, err := sdl.CreateWindow(
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title,
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sdl.WINDOWPOS_CENTERED,
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sdl.WINDOWPOS_CENTERED,
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int32(width),
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int32(height),
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sdl.WINDOW_OPENGL,
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)
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if err != nil {
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return nil, err
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}
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sdlRenderer, err := sdl.CreateRenderer(sdlWindow, -1, sdl.RENDERER_ACCELERATED)
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if err != nil {
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sdlWindow.Destroy()
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return nil, err
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}
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sdlGlContext, err := sdlWindow.GLCreateContext()
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if err != nil {
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sdlWindow.Destroy()
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return nil, err
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}
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window := &Window{sdlWindow, sdlGlContext, sdlRenderer, scene}
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if err := scene.Init(window); err != nil {
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return nil, err
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}
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return window, nil
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}
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func (w *Window) Destroy() error {
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if w.sdlWindow == nil {
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return nil
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}
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if err := w.scene.Shutdown(w); err != nil {
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return err
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}
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if err := w.sdlWindow.Destroy(); err != nil {
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return err
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}
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w.sdlGlContext = nil
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w.sdlWindow = nil
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return nil
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}
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func (w *Window) CreateTextureRgba(colors []color.RGBA, width, height int) (*Texture, error) {
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return newTextureFromRgba(w.sdlRenderer, colors, width, height)
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}
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func (w *Window) RenderTexture(texture *Texture, srcRect, dstRect math.Rect4i) {
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w.sdlRenderer.Copy(
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texture.sdlTexture,
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&sdl.Rect{X: int32(srcRect.X), Y: int32(srcRect.Y), W: int32(srcRect.W), H: int32(srcRect.H)},
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&sdl.Rect{X: int32(dstRect.X), Y: int32(dstRect.Y), W: int32(dstRect.W), H: int32(dstRect.H)},
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)
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}
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func (w *Window) advance() {
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imgui_backend.NewFrame(w.displaySize())
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w.sdlRenderer.Clear()
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w.scene.Advance(w)
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w.sdlWindow.GLMakeCurrent(w.sdlGlContext)
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imgui.Render()
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imgui_backend.Render(w.displaySize(), w.bufferSize(), imgui.RenderedDrawData())
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w.sdlWindow.GLSwap()
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}
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func (w *Window) displaySize() math.Vec2i {
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width, height := w.sdlWindow.GetSize()
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return math.Vec2i{X: int(width), Y: int(height)}
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}
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func (w *Window) bufferSize() math.Vec2i {
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width, height := w.sdlWindow.GLGetDrawableSize()
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return math.Vec2i{X: int(width), Y: int(height)}
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}
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