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graphics: Bug fix: Initialize must be done even when Draw is called first

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This commit is contained in:
Hajime Hoshi 2016-06-14 00:55:25 +09:00
parent 218df19ead
commit b852f5a0f7
1 changed files with 11 additions and 1 deletions
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12
graphicscontext.go
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@ -65,7 +65,7 @@ func (c *graphicsContext) needsRestoring(context *opengl.Context) (bool, error)
return c.screen.impl.isInvalidated(context), nil return c.screen.impl.isInvalidated(context), nil
} }
func (c *graphicsContext) UpdateAndDraw() error { func (c *graphicsContext) initializeIfNeeded() error {
if !c.initialized { if !c.initialized {
if err := graphics.Initialize(ui.GLContext()); err != nil { if err := graphics.Initialize(ui.GLContext()); err != nil {
return err return err
@ -81,6 +81,13 @@ func (c *graphicsContext) UpdateAndDraw() error {
return err return err
} }
} }
return nil
}
func (c *graphicsContext) UpdateAndDraw() error {
if err := c.initializeIfNeeded(); err != nil {
return err
}
if err := c.screen.Clear(); err != nil { if err := c.screen.Clear(); err != nil {
return err return err
} }
@ -113,6 +120,9 @@ func (c *graphicsContext) UpdateAndDraw() error {
} }
func (c *graphicsContext) Draw() error { func (c *graphicsContext) Draw() error {
if err := c.initializeIfNeeded(); err != nil {
return err
}
if err := c.defaultRenderTarget.Clear(); err != nil { if err := c.defaultRenderTarget.Clear(); err != nil {
return err return err
} }