func NewSDLRenderer(surface *sdl.Surface, font *ttf.Font) *SDLRenderer {
renderer := &SDLRenderer{
Color: sdl.Color{255, 255, 255, 0},
visibleSurface: surface,
Font: font,
eventCh: make(chan interface{}),
updatedRectsCh: make(chan []sdl.Rect),
updatedRects: make([]sdl.Rect, 0),
width: uint(surface.W),
height: uint(surface.H),
}
fontWidth, fontHeight, err := font.SizeText("A")
if err != 0 {
panic("failed to determine font dimensions: " + sdl.GetError())
}
renderer.fontWidth = uint(fontWidth)
renderer.fontHeight = uint(fontHeight)
renderer.lastVisibleLine = (renderer.height / renderer.fontHeight) * MAX_INTERNAL_SIZE_FACTOR
renderer.internalSurfaceHeight = uint(renderer.fontHeight)
renderer.internalSurfaceMaxHeight = renderer.height * MAX_INTERNAL_SIZE_FACTOR
renderer.internalSurface = sdl.CreateRGBSurface(sdl.SWSURFACE,
int(renderer.width), int(renderer.internalSurfaceHeight), 32, 0, 0, 0, 0)
renderer.calcCommandLineRect()
renderer.updatedRects = append(renderer.updatedRects, sdl.Rect{0, 0, uint16(renderer.width), uint16(renderer.height)})
go renderer.loop()
return renderer
}
func initSDL() {
if sdl.Init(sdl.INIT_VIDEO) != 0 {
panic(sdl.GetError())
}
if ttf.Init() != 0 {
panic(sdl.GetError())
}
font := ttf.OpenFont("testdata/VeraMono.ttf", 20)
if font == nil {
panic(sdl.GetError())
}
appSurface = sdl.SetVideoMode(640, 480, 32, 0)
sdlrenderer = NewSDLRenderer(sdl.CreateRGBSurface(sdl.SRCALPHA, 640, 480, 32, 0, 0, 0, 0), font)
sdlrenderer.GetSurface().SetAlpha(sdl.SRCALPHA, 0xaa)
console = NewConsole(nil)
go func() {
for {
select {
case rects := <-sdlrenderer.UpdatedRectsCh():
render(rects)
}
}
}()
render(nil)
}
func newSDLSurface(app *spectrum.Application, w, h int) *SDLSurface {
surface := sdl.CreateRGBSurface(sdl.SWSURFACE, w, h, 32, 0, 0, 0, 0)
if surface == nil {
app.PrintfMsg("%s", sdl.GetError())
app.RequestExit()
return nil
}
return &SDLSurface{surface}
}
func newCLISurface(scale2x, fullscreen bool) *clingon.SDLRenderer {
cliSurface := clingon.NewSDLRenderer(
sdl.CreateRGBSurface(
sdl.SRCALPHA,
width(scale2x, fullscreen),
height(scale2x, fullscreen)/2, 32, 0, 0, 0, 0),
newFont(scale2x, fullscreen),
)
cliSurface.GetSurface().SetAlpha(sdl.SRCALPHA, 0xdd)
return cliSurface
}
func (renderer *SDLRenderer) resizeInternalSurface(console *Console) {
h := uint(len(console.lines)+1) * renderer.fontHeight
if h > renderer.internalSurfaceMaxHeight {
h = renderer.internalSurfaceMaxHeight
}
if renderer.internalSurfaceHeight != h {
renderer.internalSurface.Free()
renderer.internalSurface = sdl.CreateRGBSurface(sdl.SWSURFACE, int(renderer.width), int(h), 32, 0, 0, 0, 0)
renderer.calcCommandLineRect()
renderer.cursorY = int(renderer.commandLineRect.Y)
renderer.viewportY = int(renderer.internalSurface.H - renderer.visibleSurface.H)
renderer.internalSurfaceHeight = h
renderer.internalSurface.SetClipRect(&sdl.Rect{0, 0, uint16(renderer.width), uint16(h)})
}
}