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Merge change 25435 into eclair

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* changes:
  disable backbuffer preservation when possible, which may improve performance a bit
This commit is contained in:
Android (Google) Code Review
2009-09-16 23:16:18 -04:00
parent 81521abea1 af369f6280
commit a6aca3e094
1 changed files with 7 additions and 0 deletions
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7
libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
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@@ -174,6 +174,13 @@ void DisplayHardware::init(uint32_t dpy)
surface = eglCreateWindowSurface(display, config, mNativeWindow.get(), NULL); surface = eglCreateWindowSurface(display, config, mNativeWindow.get(), NULL);
if (mFlags & UPDATE_ON_DEMAND) {
// if we have update on demand, we definitely don't need to
// preserve the backbuffer, which is usually costly.
eglSurfaceAttrib(display, surface,
EGL_SWAP_BEHAVIOR, EGL_BUFFER_DESTROYED);
}
if (eglQuerySurface(display, surface, EGL_SWAP_BEHAVIOR, &dummy) == EGL_TRUE) { if (eglQuerySurface(display, surface, EGL_SWAP_BEHAVIOR, &dummy) == EGL_TRUE) {
if (dummy == EGL_BUFFER_PRESERVED) { if (dummy == EGL_BUFFER_PRESERVED) {
mFlags |= BUFFER_PRESERVED; mFlags |= BUFFER_PRESERVED;