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Bug 722225 - Improve Firefox startup speed by ~5% (-70ms) on Windows by optimizing D3D10CreateDevice1. r=bas

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This commit is contained in:
Brian R. Bondy 2012-02-09 13:50:54 -05:00
parent 7f6fc99890
commit ae85a7084c
1 changed files with 77 additions and 24 deletions
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101
gfx/thebes/gfxWindowsPlatform.cpp
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@ -361,38 +361,91 @@ gfxWindowsPlatform::VerifyD2DDevice(bool aAttemptForce)
}
}
// We try 10.0 first even though we prefer 10.1, since we want to
// fail as fast as possible if 10.x isn't supported.
HRESULT hr = createD3DDevice(
adapter1,
D3D10_DRIVER_TYPE_HARDWARE,
NULL,
D3D10_CREATE_DEVICE_BGRA_SUPPORT |
D3D10_CREATE_DEVICE_PREVENT_INTERNAL_THREADING_OPTIMIZATIONS,
D3D10_FEATURE_LEVEL_10_0,
D3D10_1_SDK_VERSION,
getter_AddRefs(device));
// It takes a lot of time (5-10% of startup time or ~100ms) to do both
// a createD3DDevice on D3D10_FEATURE_LEVEL_10_0 and
// D3D10_FEATURE_LEVEL_10_1. Therefore we set a pref if we ever get
// 10.1 to work and we use that first if the pref is set.
// Going direct to a 10.1 check only takes 20-30ms.
// The initialization of hr doesn't matter here because it will get
// overwritten whether or not the preference is set.
// - If the preferD3D10_1 pref is set it gets overwritten immediately.
// - If the preferD3D10_1 pref is not set, the if condition after
// the one that follows us immediately will short circuit before
// checking FAILED(hr) and will again get overwritten immediately.
// We initialize it here just so it does not appear to be an
// uninitialized value.
HRESULT hr = E_FAIL;
bool preferD3D10_1 =
Preferences::GetBool("gfx.direct3d.prefer_10_1", false);
if (preferD3D10_1) {
hr = createD3DDevice(
adapter1,
D3D10_DRIVER_TYPE_HARDWARE,
NULL,
D3D10_CREATE_DEVICE_BGRA_SUPPORT |
D3D10_CREATE_DEVICE_PREVENT_INTERNAL_THREADING_OPTIMIZATIONS,
D3D10_FEATURE_LEVEL_10_1,
D3D10_1_SDK_VERSION,
getter_AddRefs(device));
if (SUCCEEDED(hr)) {
// We have 10.0, let's try 10.1.
// XXX - This adds an additional 10-20ms for people who are
// getting direct2d. We'd really like to do something more
// clever.
// If we fail here, the DirectX version or video card probably
// changed. We previously could use 10.1 but now we can't
// anymore. Revert back to doing a 10.0 check first before
// the 10.1 check.
if (FAILED(hr)) {
Preferences::SetBool("gfx.direct3d.prefer_10_1", false);
} else {
mD2DDevice = cairo_d2d_create_device_from_d3d10device(device);
}
}
if (!preferD3D10_1 || FAILED(hr)) {
// If preferD3D10_1 is set and 10.1 failed, fall back to 10.0.
// if preferD3D10_1 is not yet set, then first try to create
// a 10.0 D3D device, then try to see if 10.1 works.
nsRefPtr<ID3D10Device1> device1;
hr = createD3DDevice(
adapter1,
D3D10_DRIVER_TYPE_HARDWARE,
NULL,
D3D10_CREATE_DEVICE_BGRA_SUPPORT |
D3D10_CREATE_DEVICE_PREVENT_INTERNAL_THREADING_OPTIMIZATIONS,
D3D10_FEATURE_LEVEL_10_1,
D3D10_1_SDK_VERSION,
getter_AddRefs(device1));
adapter1,
D3D10_DRIVER_TYPE_HARDWARE,
NULL,
D3D10_CREATE_DEVICE_BGRA_SUPPORT |
D3D10_CREATE_DEVICE_PREVENT_INTERNAL_THREADING_OPTIMIZATIONS,
D3D10_FEATURE_LEVEL_10_0,
D3D10_1_SDK_VERSION,
getter_AddRefs(device1));
if (SUCCEEDED(hr)) {
device = device1;
if (preferD3D10_1) {
mD2DDevice =
cairo_d2d_create_device_from_d3d10device(device);
}
}
}
// If preferD3D10_1 is not yet set and 10.0 succeeded
if (!preferD3D10_1 && SUCCEEDED(hr)) {
// We have 10.0, let's try 10.1. This second check will only
// ever be done once if it succeeds. After that an option
// will be set to prefer using 10.1 before trying 10.0.
// In the case that 10.1 fails, it won't be a long operation
// like it is when 10.1 succeeds, so we don't need to optimize
// the case where 10.1 is not supported, but 10.0 is supported.
nsRefPtr<ID3D10Device1> device1;
hr = createD3DDevice(
adapter1,
D3D10_DRIVER_TYPE_HARDWARE,
NULL,
D3D10_CREATE_DEVICE_BGRA_SUPPORT |
D3D10_CREATE_DEVICE_PREVENT_INTERNAL_THREADING_OPTIMIZATIONS,
D3D10_FEATURE_LEVEL_10_1,
D3D10_1_SDK_VERSION,
getter_AddRefs(device1));
if (SUCCEEDED(hr)) {
device = device1;
Preferences::SetBool("gfx.direct3d.prefer_10_1", true);
}
mD2DDevice = cairo_d2d_create_device_from_d3d10device(device);
}
}