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graphics: Reduce calls of ui.GLContext()

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This commit is contained in:
Hajime Hoshi 2016-07-03 15:41:04 +09:00
parent 89fe69d564
commit 375d71e085
1 changed files with 19 additions and 19 deletions
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38
graphicscontext.go
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@ -79,27 +79,27 @@ func (c *graphicsContext) needsRestoring(context *opengl.Context) (bool, error)
imageM.Lock()
defer imageM.Unlock()
// FlushCommands is required because c.offscreen.impl might not have an actual texture.
if err := graphics.FlushCommands(ui.GLContext()); err != nil {
if err := graphics.FlushCommands(context); err != nil {
return false, err
}
return c.offscreen.impl.isInvalidated(context), nil
}
func (c *graphicsContext) initializeIfNeeded() error {
func (c *graphicsContext) initializeIfNeeded(context *opengl.Context) error {
// glViewport must be called at every frame on iOS
ui.GLContext().ResetViewportSize()
context.ResetViewportSize()
if !c.initialized {
if err := graphics.Initialize(ui.GLContext()); err != nil {
if err := graphics.Initialize(context); err != nil {
return err
}
c.initialized = true
}
r, err := c.needsRestoring(ui.GLContext())
r, err := c.needsRestoring(context)
if err != nil {
return err
}
if r {
if err := c.restore(); err != nil {
if err := c.restore(context); err != nil {
return err
}
}
@ -119,21 +119,21 @@ func drawWithFittingScale(dst *Image, src *Image) error {
return nil
}
func (c *graphicsContext) drawToDefaultRenderTarget() error {
func (c *graphicsContext) drawToDefaultRenderTarget(context *opengl.Context) error {
if err := c.screen.Clear(); err != nil {
return err
}
if err := drawWithFittingScale(c.screen, c.offscreen2); err != nil {
return err
}
if err := c.flush(); err != nil {
if err := c.flush(context); err != nil {
return err
}
return nil
}
func (c *graphicsContext) UpdateAndDraw() error {
if err := c.initializeIfNeeded(); err != nil {
if err := c.initializeIfNeeded(ui.GLContext()); err != nil {
return err
}
if err := c.offscreen.Clear(); err != nil {
@ -151,7 +151,7 @@ func (c *graphicsContext) UpdateAndDraw() error {
if err := drawWithFittingScale(c.offscreen2, c.offscreen); err != nil {
return err
}
if err := c.drawToDefaultRenderTarget(); err != nil {
if err := c.drawToDefaultRenderTarget(ui.GLContext()); err != nil {
return err
}
if err := theImages.savePixels(ui.GLContext()); err != nil {
@ -161,35 +161,35 @@ func (c *graphicsContext) UpdateAndDraw() error {
}
func (c *graphicsContext) Draw() error {
if err := c.initializeIfNeeded(); err != nil {
if err := c.initializeIfNeeded(ui.GLContext()); err != nil {
return err
}
if err := c.drawToDefaultRenderTarget(); err != nil {
if err := c.drawToDefaultRenderTarget(ui.GLContext()); err != nil {
return err
}
return nil
}
func (c *graphicsContext) flush() error {
func (c *graphicsContext) flush(context *opengl.Context) error {
// TODO: imageM is necessary to call graphics functions. Move this to graphics package.
imageM.Lock()
defer imageM.Unlock()
if err := graphics.FlushCommands(ui.GLContext()); err != nil {
if err := graphics.FlushCommands(context); err != nil {
return err
}
// Call glFlush to prevent black flicking (especially on Android (#226) and iOS).
ui.GLContext().Flush()
context.Flush()
return nil
}
func (c *graphicsContext) restore() error {
func (c *graphicsContext) restore(context *opengl.Context) error {
imageM.Lock()
defer imageM.Unlock()
ui.GLContext().Resume()
if err := graphics.Initialize(ui.GLContext()); err != nil {
context.Resume()
if err := graphics.Initialize(context); err != nil {
return err
}
if err := theImages.restorePixels(ui.GLContext()); err != nil {
if err := theImages.restorePixels(context); err != nil {
return err
}
return nil