class final Core · roukmoute/pdf 0.6.2
PDF\Specification\Dictionary\MarkupAnnotationsTable170\CAEntryTable 170, /CA; PDF type: number; Optional; PDF 1.4.Inheritance and contracts
Parent : PDF\Specification\SchemaEntry
Definition in the specification
Table 170 · Additional entries specific to markup annotations
ISO 32000-1:2008, §12.5.6.2 · PDF page 400 ↗
/CA number
(Optional; PDF 1.4) The constant opacity value that shall be used in painting the annotation (see Sections 11.2, “Overview of Transparency,” and 11.3.7, “Shape and Opacity Computations”). This value shall apply to all visible elements of the annotation in its closed state (including its background and border) but not to the pop-up window that appears when the annotation is opened. The specified value shall not used if the annotation has an appearance stream (see 12.5.5, “Appearance Streams”); in that case, the appearance stream shall specify any transparency. (However, if the compliant viewer regenerates the annotation’s appearance stream, it may incorporate the CA value into the stream’s content.) The implicit blend mode (see 11.3.5, “Blend Mode””) is Normal. Default value: 1.0. If no explicit appearance stream is defined for the annotation, it may be painted by implementation-dependent means that do not necessarily conform to the PDF imaging model; in this case, the effect of this entry is implementation-dependent as well.
Qualifier: Optional; PDF 1.4
Conditional descriptions remain traceable. A definition alone does not implement a codec, a signature or every format mechanism. Read the coverage.
Construction
__construct()
public function __construct(PDF\Syntax\Object\NumericType|PDF\Syntax\Object\IndirectReference $value)Inherited methods
3 methods from parents and contracts
definition()
public function definition(): PDF\Specification\EntryDefinitionkey()
public function key(): PDF\Syntax\Object\NameTypevalue()
public function value(): PDF\Syntax\FileStructure\BasicTypeProperties
| Declaration | Origin and documentation |
|---|---|
public readonly PDF\Syntax\Object\NameType $key | PDF\Syntax\Object\DictionaryObject\Entry |
public readonly PDF\Syntax\FileStructure\BasicType $value | PDF\Syntax\Object\DictionaryObject\Entry |
Constants
| Name | PHP value | Origin |
|---|---|---|
KEY | | PDF\Specification\Dictionary\MarkupAnnotationsTable170\CAEntry |
TABLE | | PDF\Specification\Dictionary\MarkupAnnotationsTable170\CAEntry |
VARIABLE | | PDF\Specification\SchemaEntry |