117 lines
2.3 KiB
Go
117 lines
2.3 KiB
Go
// Package sdl provides an SDL2 renderer for Doodle.
|
|
package sdl
|
|
|
|
import (
|
|
"time"
|
|
|
|
"git.kirsle.net/apps/doodle/lib/events"
|
|
"git.kirsle.net/apps/doodle/lib/render"
|
|
"git.kirsle.net/apps/doodle/pkg/log"
|
|
"github.com/veandco/go-sdl2/sdl"
|
|
"github.com/veandco/go-sdl2/ttf"
|
|
)
|
|
|
|
// Renderer manages the SDL state.
|
|
type Renderer struct {
|
|
// Configurable fields.
|
|
title string
|
|
width int32
|
|
height int32
|
|
startTime time.Time
|
|
|
|
// Private fields.
|
|
events *events.State
|
|
window *sdl.Window
|
|
renderer *sdl.Renderer
|
|
running bool
|
|
ticks uint64
|
|
|
|
// Optimizations to minimize SDL calls.
|
|
lastColor render.Color
|
|
}
|
|
|
|
// New creates the SDL renderer.
|
|
func New(title string, width, height int) *Renderer {
|
|
return &Renderer{
|
|
events: events.New(),
|
|
title: title,
|
|
width: int32(width),
|
|
height: int32(height),
|
|
}
|
|
}
|
|
|
|
// Teardown tasks when exiting the program.
|
|
func (r *Renderer) Teardown() {
|
|
r.renderer.Destroy()
|
|
r.window.Destroy()
|
|
sdl.Quit()
|
|
}
|
|
|
|
// Setup the renderer.
|
|
func (r *Renderer) Setup() error {
|
|
// Initialize SDL.
|
|
log.Info("Initializing SDL")
|
|
if err := sdl.Init(sdl.INIT_EVERYTHING); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Initialize SDL_TTF.
|
|
log.Info("Initializing SDL_TTF")
|
|
if err := ttf.Init(); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Create our window.
|
|
log.Info("Creating the Main Window")
|
|
window, err := sdl.CreateWindow(
|
|
r.title,
|
|
sdl.WINDOWPOS_CENTERED,
|
|
sdl.WINDOWPOS_CENTERED,
|
|
r.width,
|
|
r.height,
|
|
sdl.WINDOW_SHOWN|sdl.WINDOW_RESIZABLE,
|
|
)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
r.window = window
|
|
|
|
// Blank out the window in white.
|
|
log.Info("Creating the SDL Renderer")
|
|
renderer, err := sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
renderer.SetDrawBlendMode(sdl.BLENDMODE_BLEND)
|
|
r.renderer = renderer
|
|
|
|
return nil
|
|
}
|
|
|
|
// GetTicks gets SDL's current tick count.
|
|
func (r *Renderer) GetTicks() uint32 {
|
|
return sdl.GetTicks()
|
|
}
|
|
|
|
// WindowSize returns the SDL window size.
|
|
func (r *Renderer) WindowSize() (int, int) {
|
|
w, h := r.window.GetSize()
|
|
return int(w), int(h)
|
|
}
|
|
|
|
// Present the current frame.
|
|
func (r *Renderer) Present() error {
|
|
r.renderer.Present()
|
|
return nil
|
|
}
|
|
|
|
// Delay using sdl.Delay
|
|
func (r *Renderer) Delay(time uint32) {
|
|
sdl.Delay(time)
|
|
}
|
|
|
|
// Loop is the main loop.
|
|
func (r *Renderer) Loop() error {
|
|
return nil
|
|
}
|