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| double | donner::svg::BoundedPositiveFilterPixels (double value) |
| | Clamp a finite nonnegative radius to the filter-work bound.
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| double | donner::svg::BoundedSignedFilterPixels (double value) |
| | Clamp a finite offset to the filter-work bound.
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size_t | donner::svg::FilterInputSlotCount (const components::FilterNode &node) |
| | The number of inputs a primitive reads through the filter attribute surface. feComposite, feBlend and feDisplacementMap each take a second input (in2); feMerge is variadic and reads exactly the list it was built with, and every other primitive reads at most one input. The cap of two is deliberate rather than a lower bound: those primitives never sample a third input, so an extra entry a caller appends must not widen the node's subregion either.
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components::FilterInput | donner::svg::FilterInputOrDefault (const components::FilterNode &node, size_t index) |
| | The input in slot index, or the default for a slot the graph left empty. A slot the graph never populated is an unspecified in/in2 attribute, and both resolve the same way: to the preceding primitive's result, which is SourceGraphic only when this node is the first primitive in the filter. Falling back to the node's own first input instead would silently composite, blend, or displace a buffer against itself.
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| double | donner::svg::FilterDeviceScaleX (const Transform2d &transform) |
| | Device scale of the filter X axis.
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| double | donner::svg::FilterDeviceScaleY (const Transform2d &transform, double scaleX) |
| | Device scale of the filter Y axis.
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| double | donner::svg::FilterLengthInPixels (double value, double bound, double scale, bool objectBounds) |
| | Resolve an effect length in device pixels.
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| Vector2d | donner::svg::FilterOffsetInPixels (Vector2d offset, Vector2d bounds, bool objectBounds, const Transform2d &transform) |
| | Resolve a filter offset vector in device coordinates.
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const components::FilterNode * | donner::svg::FilterFirstInputNode (const components::FilterGraph &graph, size_t index) |
| | The node a primitive's first input names, or nullptr when it reads a standard input.
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| Vector2d | donner::svg::FinishFilterReach (Vector2d reach) |
| | Finish a device reach: one more pixel covers rounding at the reach's edge.
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| FilterInputMargin | donner::svg::ComputeFilterSamplingReach (const components::FilterGraph &graph, const Transform2d &deviceFromFilter) |
| | Conservatively measure how far beyond each output pixel a filter graph reads its raster. Every primitive counts, including those fed only by generators: feFlood, feImage and feTurbulence produce output only over the raster, so a later blur or tile still needs the raster to extend past the viewport. Reaches add up, since chained primitives compound.
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| FilterInputMargin | donner::svg::ComputeFilterInputMargin (const components::FilterGraph &graph, const Transform2d &deviceFromFilter) |
| | The input margin a filter layer's capture gets: the graph's sampling reach, or none when the capture must stay viewport-aligned (see components::FilterGraph::keepsViewportAlignedCapture and feTurbulence).
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| int | donner::svg::FilterInputExtension (double beyond, double needed) |
| | Pixels to extend a filter input raster past one viewport edge.
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| FilterInputAxis | donner::svg::LayoutFilterInputAxis (std::pair< double, double > region, double reach, std::optional< std::pair< double, double > > capture, int viewport) |
| | Lay out one raster axis.
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FilterInputBuffer | donner::svg::ComputeFilterInputBuffer (const components::FilterGraph &graph, const std::optional< Box2d > &filterRegion, const Transform2d &deviceFromFilter, int viewportWidth, int viewportHeight) |
| | Lay out the input raster for a filter layer over a viewportWidth by viewportHeight surface. Primitives that read input away from the output position need the filtered content just past the viewport, so the raster extends by the graph's input margin wherever the filter region extends past the viewport, up to the whole region for a graph with unbounded reach. Each axis stays within the surface dimension limit; a layout over the pixel limit falls back to the viewport. Renderers also fall back to the viewport when the larger raster would not fit the frame's filter budgets.
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| std::optional< Transform2d > | donner::svg::FiniteFilterInverse (const Transform2d &deviceFromFilter) |
| | Invert only finite, nonsingular transforms whose inverse remains finite.
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1.15.0