本文整理汇总了C++中gfx::IntRect::Size方法的典型用法代码示例。如果您正苦于以下问题：C++ IntRect::Size方法的具体用法？C++ IntRect::Size怎么用？C++ IntRect::Size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gfx::IntRect的用法示例。
在下文中一共展示了IntRect::Size方法的2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: desc
TemporaryRef<CompositingRenderTarget>
CompositorD3D11::CreateRenderTargetFromSource(const gfx::IntRect &aRect,
const CompositingRenderTarget* aSource,
const gfx::IntPoint &aSourcePoint)
{
MOZ_ASSERT(aRect.width != 0 && aRect.height != 0);
if (aRect.width * aRect.height == 0) {
return nullptr;
}
CD3D11_TEXTURE2D_DESC desc(DXGI_FORMAT_B8G8R8A8_UNORM,
aRect.width, aRect.height, 1, 1,
D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_RENDER_TARGET);
RefPtr<ID3D11Texture2D> texture;
HRESULT hr = mDevice->CreateTexture2D(&desc, nullptr, byRef(texture));
NS_ASSERTION(texture, "Could not create texture");
if (Failed(hr) || !texture) {
return nullptr;
}
if (aSource) {
const CompositingRenderTargetD3D11* sourceD3D11 =
static_cast<const CompositingRenderTargetD3D11*>(aSource);
D3D11_BOX srcBox;
srcBox.left = aSourcePoint.x;
srcBox.top = aSourcePoint.y;
srcBox.front = 0;
srcBox.right = aSourcePoint.x + aRect.width;
srcBox.bottom = aSourcePoint.y + aRect.height;
srcBox.back = 1;
const IntSize& srcSize = sourceD3D11->GetSize();
MOZ_ASSERT(srcSize.width >= 0 && srcSize.height >= 0,
"render targets should have nonnegative sizes");
if (srcBox.left >= 0 &&
srcBox.top >= 0 &&
srcBox.left < srcBox.right &&
srcBox.top < srcBox.bottom &&
srcBox.right <= static_cast<uint32_t>(srcSize.width) &&
srcBox.bottom <= static_cast<uint32_t>(srcSize.height)) {
mContext->CopySubresourceRegion(texture, 0,
0, 0, 0,
sourceD3D11->GetD3D11Texture(), 0,
&srcBox);
} else {
NS_WARNING("Could not copy render target - source rect out of bounds");
}
}
RefPtr<CompositingRenderTargetD3D11> rt =
new CompositingRenderTargetD3D11(texture, aRect.TopLeft());
rt->SetSize(aRect.Size());
return rt;
}示例2: renderBounds
gfx::IntRect
ComputeBackdropCopyRect(const gfx::Rect& aRect,
const gfx::IntRect& aClipRect,
const gfx::Matrix4x4& aTransform,
const gfx::IntRect& aRenderTargetRect,
gfx::Matrix4x4* aOutTransform,
gfx::Rect* aOutLayerQuad)
{
// Compute the clip.
IntPoint rtOffset = aRenderTargetRect.TopLeft();
IntSize rtSize = aRenderTargetRect.Size();
gfx::IntRect renderBounds(0, 0, rtSize.width, rtSize.height);
renderBounds.IntersectRect(renderBounds, aClipRect);
renderBounds.MoveBy(rtOffset);
// Apply the layer transform.
RectDouble dest = aTransform.TransformAndClipBounds(
RectDouble(aRect.x, aRect.y, aRect.width, aRect.height),
RectDouble(renderBounds.x, renderBounds.y, renderBounds.width, renderBounds.height));
dest -= rtOffset;
// Ensure we don't round out to -1, which trips up Direct3D.
dest.IntersectRect(dest, RectDouble(0, 0, rtSize.width, rtSize.height));
if (aOutLayerQuad) {
*aOutLayerQuad = Rect(dest.x, dest.y, dest.width, dest.height);
}
// Round out to integer.
IntRect result;
dest.RoundOut();
dest.ToIntRect(&result);
// Create a transform from adjusted clip space to render target space,
// translate it for the backdrop rect, then transform it into the backdrop's
// uv-space.
Matrix4x4 transform;
transform.PostScale(rtSize.width, rtSize.height, 1.0);
transform.PostTranslate(-result.x, -result.y, 0.0);
transform.PostScale(1 / float(result.width), 1 / float(result.height), 1.0);
*aOutTransform = transform;
return result;
}