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graphicsAdapter.go
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graphicsAdapter.go
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package graphics
import (
"github.com/GomeBox/gome/adapters/graphics"
"github.com/GomeBox/gome/primitives"
"github.com/veandco/go-sdl2/img"
"github.com/veandco/go-sdl2/sdl"
"github.com/veandco/go-sdl2/ttf"
)
type GraphicsAdapter interface {
graphics.TextureLoader
graphics.WindowAdapter
graphics.ScreenPresenter
TextureLoader() graphics.TextureLoader
TextureCreator() graphics.TextureCreator
WindowAdapter() graphics.WindowAdapter
ScreenPresenter() graphics.ScreenPresenter
FontLoader() graphics.FontLoader
Init() error
}
func NewGraphicsAdapter() GraphicsAdapter {
return new(graphicsAdapter)
}
type graphicsAdapter struct {
window *sdl.Window
renderer *sdl.Renderer
fontLoader FontLoader
resolution primitives.Dimensions
}
func (g *graphicsAdapter) Init() error {
err := sdl.Init(sdl.INIT_VIDEO)
if err != nil {
return err
}
err = img.Init(img.INIT_JPG | img.INIT_PNG)
if err != nil {
return err
}
err = ttf.Init()
if err != nil {
return err
}
return nil
}
func (g *graphicsAdapter) TextureLoader() graphics.TextureLoader {
return g
}
func (g *graphicsAdapter) WindowAdapter() graphics.WindowAdapter {
return g
}
func (g *graphicsAdapter) ScreenPresenter() graphics.ScreenPresenter {
return g
}
func (g *graphicsAdapter) FontLoader() graphics.FontLoader {
return g.fontLoader
}
func (g *graphicsAdapter) OpenWindow(windowSettings *graphics.WindowSettings) error {
var screenPosX int32
var screenPosY int32
var resWidth, resHeight int
var flags uint32
flags |= sdl.WINDOW_OPENGL
flags |= sdl.WINDOW_MOUSE_CAPTURE
displayMode, err := sdl.GetDisplayMode(0, 0)
if err != nil {
return err
}
resWidth = int(displayMode.W)
resHeight = int(displayMode.H)
g.resolution = primitives.Dimensions{
Width: resWidth,
Height: resHeight,
}
if windowSettings.Resolution.Width != 0 {
g.resolution.Width = windowSettings.Resolution.Width
}
if windowSettings.Resolution.Height != 0 {
g.resolution.Height = windowSettings.Resolution.Height
}
if windowSettings.Fullscreen {
screenPosX = 0
screenPosY = 0
flags |= sdl.WINDOW_FULLSCREEN_DESKTOP
} else {
screenPosX = sdl.WINDOWPOS_UNDEFINED
screenPosY = sdl.WINDOWPOS_UNDEFINED
if windowSettings.Resolution.Width != 0 && windowSettings.Resolution.Height != 0 {
resWidth = windowSettings.Resolution.Width
resHeight = windowSettings.Resolution.Height
}
flags |= sdl.WINDOW_BORDERLESS
}
window, err := sdl.CreateWindow(
windowSettings.Title,
screenPosX, screenPosY,
int32(resWidth), int32(resHeight),
flags)
if err != nil {
return err
}
g.window = window
renderer, err := sdl.CreateRenderer(
window,
-1,
sdl.RENDERER_ACCELERATED|sdl.RENDERER_ACCELERATED)
if err != nil {
return err
}
g.renderer = renderer
err = renderer.SetLogicalSize(int32(g.resolution.Width), int32(g.resolution.Height))
if err != nil {
return err
}
err = renderer.SetDrawBlendMode(sdl.BLENDMODE_BLEND)
if err != nil {
return err
}
//TODO: This should not be here
g.fontLoader = NewFontLoader(renderer)
window.Show()
renderer.Present()
return nil
}
func (g *graphicsAdapter) IsOpen() bool {
return g.window != nil
}
func (g *graphicsAdapter) Size() primitives.Dimensions {
if g.window == nil {
return primitives.Dimensions{}
}
return g.resolution
}
func (g *graphicsAdapter) TextureCreator() graphics.TextureCreator {
creator := textureCreator{renderer: g.renderer}
return creator
}
func (g *graphicsAdapter) Load(fileName string) (graphics.Texture, error) {
tex, err := img.LoadTexture(g.renderer, fileName)
if err != nil {
return nil, err
}
_, _, w, h, err := tex.Query()
if err != nil {
return nil, err
}
drawer := textureDrawer{renderer: g.renderer, sdlTexture: tex}
return newTexture(drawer, primitives.Dimensions{
Width: int(w),
Height: int(h),
}), nil
}
func (g *graphicsAdapter) Present() error {
g.renderer.Present()
return nil
}
func (g *graphicsAdapter) Clear() error {
err := g.renderer.Clear()
if err != nil {
return nil
}
return nil
}