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manage triple buffering

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REVIEW: 110556
This commit is contained in:
Thomas Lübking 2013-03-28 22:26:47 +01:00
parent b8439145bd
commit 6c998fc668
2 changed files with 17 additions and 8 deletions
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11
eglonxbackend.cpp
View file

@ -258,6 +258,9 @@ bool EglOnXBackend::initBufferConfigs()
void EglOnXBackend::present()
{
if (lastDamage().isEmpty())
return;
const QRegion displayRegion(0, 0, displayWidth(), displayHeight());
const bool fullRepaint = (lastDamage() == displayRegion);
@ -301,16 +304,18 @@ SceneOpenGL::TexturePrivate *EglOnXBackend::createBackendTexture(SceneOpenGL::Te
void EglOnXBackend::prepareRenderingFrame()
{
if (!lastDamage().isEmpty())
present();
eglWaitNative(EGL_CORE_NATIVE_ENGINE);
present();
startRenderTimer();
eglWaitNative(EGL_CORE_NATIVE_ENGINE);
}
void EglOnXBackend::endRenderingFrame(const QRegion &damage)
{
setLastDamage(damage);
glFlush();
if (!blocksForRetrace()) {
present(); // this sets lastDamage emtpy and prevents execution from prepareRenderingFrame()
}
if (overlayWindow()->window()) // show the window only after the first pass,
overlayWindow()->show(); // since that pass may take long

14
glxbackend.cpp
View file

@ -407,11 +407,13 @@ void GlxBackend::waitSync()
glXWaitVideoSync(1, 0, &sync);
#endif
}
startRenderTimer(); // yes, the framerate shall be constant anyway.
}
void GlxBackend::present()
{
if (lastDamage().isEmpty())
return;
const QRegion displayRegion(0, 0, displayWidth(), displayHeight());
const bool fullRepaint = (lastDamage() == displayRegion);
@ -422,7 +424,6 @@ void GlxBackend::present()
m_swapProfiler.begin();
}
glXSwapBuffers(display(), glxWindow);
startRenderTimer();
if (gs_tripleBufferNeedsDetection) {
glXWaitGL();
if (char result = m_swapProfiler.end()) {
@ -431,7 +432,7 @@ void GlxBackend::present()
}
}
} else {
waitSync(); // calls startRenderTimer();
waitSync();
glXSwapBuffers(display(), glxWindow);
}
} else if (glXCopySubBuffer) {
@ -472,8 +473,8 @@ SceneOpenGL::TexturePrivate *GlxBackend::createBackendTexture(SceneOpenGL::Textu
void GlxBackend::prepareRenderingFrame()
{
if (!lastDamage().isEmpty())
present();
present();
startRenderTimer();
glXWaitX();
}
@ -481,6 +482,9 @@ void GlxBackend::endRenderingFrame(const QRegion &damage)
{
setLastDamage(damage);
glFlush();
if (!blocksForRetrace()) {
present(); // this sets lastDamage emtpy and prevents execution from prepareRenderingFrame()
}
if (overlayWindow()->window()) // show the window only after the first pass,
overlayWindow()->show(); // since that pass may take long