We don't need the whole expense of the "Avoid artifacts when rendering as map tiles"
option, because that disables to default clipping of geometry parts which fall
outside the visible canvas extent and accordingly results in a lot of wasted rendering
calculations. Instead, we can just always use the upper left corner of the original
feature geometry before the optimisations like clipping to visible regions are applied,
and use this as the texture origin.
This means we can safely make this handling always applied and not an opt-in setting
method when exporting layouts to PDF
Options are for Lossy compression, which is the default JPEG compression
used, and Lossless compression (which creates bigger files in most
cases, but is much more suitable for professional printing outputs
or for post-production in Illustrator/etc)
The Bad news: this option is available in builds based on Qt 5.14
or later.
occurring for drawing a symbol preview
Because these have no map association, certain settings like
sizes in "meters in map units" will have no meaning, and may need
special handling
Refs #28690
QgsScopedRenderContextPainterSwap: allows for temporarily swapping
the destination painter object for a QgsRenderContext for the lifetime
of the object
QgsScopedRenderContextScaleToMm: temporarily rescales a render context
destination painter device to use millimeter based units for the lifetime
of the object
QgsScopedRenderContextScaleToPixels: temporarily rescales a render
context (which has been scaled to millimeter based units) back
to pixel based units, for the lifetime of the object
* [FEATURE] Selective masking
Advanced rendering feature that allows the definition of 'masks' areas around labels or with a new typ of symbol layer. These masks will "un-draw" symbol layers of other layers underneath.
It modifies the rendering process by adding an optional second pass.
Adds an interface for classes which provider custom
handlers for features rendered as part of a map render job.
QgsRenderedFeatureHandlerInterface objects are registered
in the QgsMapSettings objects used to construct map render
jobs. During the rendering operation, the handleRenderedFeature()
method will be called once for every rendered feature, allowing
the handler to perform some custom task based on the provided
information.
They can be used for custom tasks which operate on a set of
rendered features, such as creating spatial indexes of the
location and rendered symbology bounding box of all features
rendered on a map.
QgsMapSettings object
If specified (they default to off), these simplification settings
will override any layer-specific simplification settings, and
provide a way for specifying a global simplication to apply
to vector layers while exporting maps.
Previously only a "layer clipping extent" was available for retrieval
from a QgsRenderContext instance, yet there's a need for rendering
operations to have access to the original full extent of the map
being rendered.
The new QgsRenderContext::TextRenderFormat enum controls how text
should be handled during a render operation, e.g. whether to render
text as outlines (paths) or keep it as real text objects.
Deprecate previous arguments in QgsTextRenderer which handled
this same use case.
This allows us to make the setting vary per-render, instead of
having a single global flag controlling the setting. Ultimately
this will allow us to have different behaviour within the
canvas renders vs print layout exports.
Refs #3975
Checks whether a function declaration has parameters that are
top level const.
const values in declarations do not affect the signature of a
function, so they should not be put there.
