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ui: Avoid recalc the scale factor

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This commit is contained in:
Hajime Hoshi 2017-06-05 00:06:40 +09:00
parent 1da2e35b7a
commit f7a8c7efa6
1 changed files with 9 additions and 2 deletions
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11
internal/ui/ui_glfw.go
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@ -35,6 +35,7 @@ type userInterface struct {
height int height int
scale float64 scale float64
deviceScale float64 deviceScale float64
glfwScale float64
funcs chan func() funcs chan func()
running bool running bool
sizeChanged bool sizeChanged bool
@ -201,7 +202,10 @@ func Run(width, height int, scale float64, title string, g GraphicsContext) erro
} }
func (u *userInterface) glfwSize() (int, int) { func (u *userInterface) glfwSize() (int, int) {
return int(float64(u.width) * u.scale * glfwScale()), int(float64(u.height) * u.scale * glfwScale()) if u.glfwScale == 0 {
u.glfwScale = glfwScale()
}
return int(float64(u.width) * u.scale * u.glfwScale), int(float64(u.height) * u.scale * u.glfwScale)
} }
func (u *userInterface) actualScreenScale() float64 { func (u *userInterface) actualScreenScale() float64 {
@ -213,7 +217,10 @@ func (u *userInterface) actualScreenScale() float64 {
func (u *userInterface) pollEvents() { func (u *userInterface) pollEvents() {
glfw.PollEvents() glfw.PollEvents()
currentInput.update(u.window, u.scale*glfwScale()) if u.glfwScale == 0 {
u.glfwScale = glfwScale()
}
currentInput.update(u.window, u.scale*u.glfwScale)
} }
func (u *userInterface) update(g GraphicsContext) error { func (u *userInterface) update(g GraphicsContext) error {