本文整理汇总了C++中nsRefPtr::GetOffscreenPixmapSurface方法的典型用法代码示例。如果您正苦于以下问题：C++ nsRefPtr::GetOffscreenPixmapSurface方法的具体用法？C++ nsRefPtr::GetOffscreenPixmapSurface怎么用？C++ nsRefPtr::GetOffscreenPixmapSurface使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类nsRefPtr的用法示例。
在下文中一共展示了nsRefPtr::GetOffscreenPixmapSurface方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: readSize
void
BasicCanvasLayer::UpdateSurface(gfxASurface* aDestSurface, Layer* aMaskLayer)
{
if (!IsDirty())
return;
Painted();
if (mDrawTarget) {
mDrawTarget->Flush();
// TODO Fix me before turning accelerated quartz canvas by default
//mSurface = gfxPlatform::GetPlatform()->GetThebesSurfaceForDrawTarget(mDrawTarget);
}
if (!mGLContext && aDestSurface) {
nsRefPtr<gfxContext> tmpCtx = new gfxContext(aDestSurface);
tmpCtx->SetOperator(gfxContext::OPERATOR_SOURCE);
BasicCanvasLayer::PaintWithOpacity(tmpCtx, 1.0f, aMaskLayer);
return;
}
if (mGLContext) {
if (aDestSurface && aDestSurface->GetType() != gfxASurface::SurfaceTypeImage) {
NS_ASSERTION(aDestSurface->GetType() == gfxASurface::SurfaceTypeImage,
"Destination surface must be ImageSurface type");
return;
}
// We need to read from the GLContext
mGLContext->MakeCurrent();
#if defined (MOZ_X11) && defined (MOZ_EGL_XRENDER_COMPOSITE)
if (!mForceReadback) {
mGLContext->GuaranteeResolve();
gfxASurface* offscreenSurface = mGLContext->GetOffscreenPixmapSurface();
// XRender can only blend premuliplied alpha, so only allow xrender
// path if we have premultiplied alpha or opaque content.
if (offscreenSurface && (mGLBufferIsPremultiplied || (GetContentFlags() & CONTENT_OPAQUE))) {
mSurface = offscreenSurface;
mNeedsYFlip = false;
return;
}
}
#endif
gfxIntSize readSize(mBounds.width, mBounds.height);
gfxImageFormat format = (GetContentFlags() & CONTENT_OPAQUE)
? gfxASurface::ImageFormatRGB24
: gfxASurface::ImageFormatARGB32;
nsRefPtr<gfxImageSurface> readSurf;
nsRefPtr<gfxImageSurface> resultSurf;
bool usingTempSurface = false;
if (aDestSurface) {
resultSurf = static_cast<gfxImageSurface*>(aDestSurface);
if (resultSurf->GetSize() != readSize ||
resultSurf->Stride() != resultSurf->Width() * 4)
{
readSurf = GetTempSurface(readSize, format);
usingTempSurface = true;
}
} else {
resultSurf = GetTempSurface(readSize, format);
usingTempSurface = true;
}
if (!usingTempSurface)
DiscardTempSurface();
if (!readSurf)
readSurf = resultSurf;
if (!resultSurf || resultSurf->CairoStatus() != 0)
return;
MOZ_ASSERT(readSurf);
MOZ_ASSERT(readSurf->Stride() == mBounds.width * 4, "gfxImageSurface stride isn't what we expect!");
// We need to Flush() the surface before modifying it outside of cairo.
readSurf->Flush();
mGLContext->ReadScreenIntoImageSurface(readSurf);
readSurf->MarkDirty();
// If the underlying GLContext doesn't have a framebuffer into which
// premultiplied values were written, we have to do this ourselves here.
// Note that this is a WebGL attribute; GL itself has no knowledge of
// premultiplied or unpremultiplied alpha.
if (!mGLBufferIsPremultiplied)
gfxUtils::PremultiplyImageSurface(readSurf);
if (readSurf != resultSurf) {
MOZ_ASSERT(resultSurf->Width() >= readSurf->Width());
MOZ_ASSERT(resultSurf->Height() >= readSurf->Height());
resultSurf->Flush();
resultSurf->CopyFrom(readSurf);
resultSurf->MarkDirty();
//.........这里部分代码省略.........