tdf#101181 Implement glow effect on shapes

Glow effect is a color-blurred outline outside of the shape. In ooxml
document it is specified with the <a:glow> element.

The commit contains the following:
- Add support for importing and exporting <a:glow> from ooxml documents.
- Assign new properties to XShape which stores glow-related attributes.
- A new 2D primitive is introduced in module 'drawinglayer' which is
responsible for representing the glow primitive which is to be rendered.
+ A glow primitive is a clone of the original shape which has been
scaled up slightly and a new color has been assigned to it. The
radius of the glow effect and the color is defined in the <a:glow>
element being imported.
- A blur algorithm is introduced in module 'vcl', which is called during
rendering the primitive.
+ The blur algorithm works on a bitmap.
+ Since the algorithm is CPU-intensive, the result is cached in the
processor and it is recalculated only if needed.
- Add support for importing and exporting glow effect to ODF format. For
that, new attributes of element <style:graphic-properties> has been
added:
+ loext:glow, which can have the values "visible" or "hidden"
+ loext:glow-radius: which holds the radius of the glow effect in cm.
+ loext:glow-color: holds the color of the glow effect
- Tests have been added to assert properties after pptx import and
export.

Change-Id: I836aeb5e0f24e2c8d5725834c8c0f98083bc82e7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/89125
Tested-by: Jenkins
Reviewed-by: Tamás Bunth <btomi96@gmail.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/svx/source/unodraw/unoprov.cxx b/svx/source/unodraw/unoprov.cxx
index 639b8c798d39..67406c63ba40 100644
--- a/svx/source/unodraw/unoprov.cxx
+++ b/svx/source/unodraw/unoprov.cxx
@@ -68,6 +68,7 @@ static SfxItemPropertyMapEntry const * ImplGetSvxShapePropertyMap()
         SHAPE_DESCRIPTOR_PROPERTIES
         MISC_OBJ_PROPERTIES
         LINKTARGET_PROPERTIES
+        GLOW_PROPERTIES
         SHADOW_PROPERTIES
         TEXT_PROPERTIES
         // #FontWork#
@@ -91,6 +92,7 @@ static SfxItemPropertyMapEntry const * ImplGetSvxTextShapePropertyMap()
         SHAPE_DESCRIPTOR_PROPERTIES
         MISC_OBJ_PROPERTIES_NO_SHEAR
         LINKTARGET_PROPERTIES
+        GLOW_PROPERTIES
         SHADOW_PROPERTIES
         TEXT_PROPERTIES
         // #FontWork#
@@ -115,6 +117,7 @@ static SfxItemPropertyMapEntry const * ImplGetSvxConnectorPropertyMap()
         SHAPE_DESCRIPTOR_PROPERTIES
         MISC_OBJ_PROPERTIES
         LINKTARGET_PROPERTIES
+        GLOW_PROPERTIES
         SHADOW_PROPERTIES
         TEXT_PROPERTIES
         // #FontWork#
@@ -139,6 +142,7 @@ static SfxItemPropertyMapEntry const * ImplGetSvxDimensioningPropertyMap()
         SHAPE_DESCRIPTOR_PROPERTIES
         MISC_OBJ_PROPERTIES
         LINKTARGET_PROPERTIES
+        GLOW_PROPERTIES
         SHADOW_PROPERTIES
         TEXT_PROPERTIES
         // #FontWork#
@@ -163,6 +167,7 @@ static SfxItemPropertyMapEntry const * ImplGetSvxCirclePropertyMap()
         SHAPE_DESCRIPTOR_PROPERTIES
         MISC_OBJ_PROPERTIES
         LINKTARGET_PROPERTIES
+        GLOW_PROPERTIES
         SHADOW_PROPERTIES
         TEXT_PROPERTIES
         // #FontWork#
@@ -189,6 +194,7 @@ static SfxItemPropertyMapEntry const * ImplGetSvxPolyPolygonPropertyMap()
         SHAPE_DESCRIPTOR_PROPERTIES
         MISC_OBJ_PROPERTIES
         LINKTARGET_PROPERTIES
+        GLOW_PROPERTIES
         SHADOW_PROPERTIES
         TEXT_PROPERTIES
         // #FontWork#
@@ -218,6 +224,7 @@ static SfxItemPropertyMapEntry const * ImplGetSvxGraphicObjectPropertyMap()
         MISC_OBJ_PROPERTIES
 
         LINKTARGET_PROPERTIES
+        GLOW_PROPERTIES
         SHADOW_PROPERTIES
         TEXT_PROPERTIES
         // #FontWork#
@@ -368,6 +375,7 @@ static SfxItemPropertyMapEntry const * ImplGetSvxAllPropertyMap()
 {
     static SfxItemPropertyMapEntry const aAllPropertyMap_Impl[] =
     {
+        GLOW_PROPERTIES
         SHADOW_PROPERTIES
         LINE_PROPERTIES
         LINE_PROPERTIES_START_END
@@ -430,6 +438,7 @@ static SfxItemPropertyMapEntry const * ImplGetSvxOle2PropertyMap()
         SHAPE_DESCRIPTOR_PROPERTIES
         MISC_OBJ_PROPERTIES
         LINKTARGET_PROPERTIES
+        GLOW_PROPERTIES
         SHADOW_PROPERTIES
         TEXT_PROPERTIES
         FONTWORK_PROPERTIES
@@ -681,6 +690,7 @@ static SfxItemPropertyMapEntry const * ImplGetSvxCustomShapePropertyMap()
         SHAPE_DESCRIPTOR_PROPERTIES
         MISC_OBJ_PROPERTIES
         LINKTARGET_PROPERTIES
+        GLOW_PROPERTIES
         SHADOW_PROPERTIES
         TEXT_PROPERTIES
         {OUString("UserDefinedAttributes"),     SDRATTR_XMLATTRIBUTES,      cppu::UnoType<css::container::XNameContainer>::get(),        0,     0},
@@ -759,6 +769,7 @@ static comphelper::PropertyMapEntry const * ImplGetSvxDrawingDefaultsPropertyMap
 {
     static comphelper::PropertyMapEntry const aSvxDrawingDefaultsPropertyMap_Impl[] =
     {
+        GLOW_PROPERTIES
         SHADOW_PROPERTIES
         LINE_PROPERTIES_DEFAULTS
         FILL_PROPERTIES_BMP