MCGR: Model data changes for ColorSteps

Added tooling replaceStart/EndColor to allow simple
transition for code that does not immediately adapt
to multi color gradients. Also added
createColorStepsFromStartEndColor for the same
purpose.

Adapted XGradient to no longer have Start/EndColor
at all, but only use ColorSteps.

Adapted all usages of XGradient to no longer use
Get/Set/Start/EndColor, but access the ColorSteps
instead.

Replaced quite some XGradient constructors that
used XGradient() as Start/EndColor since this is
already the default.

Adapted ColorBlending to black AKA Start/EndIntens
in XGradient to work now on all ColorSteps in the
required linearly-scaled manner.

UNO API changes:

Added com::sun::star::awt::ColorStep as basic data
element that holds a pair of Offset and Color.

Added com::sun::star::awt::ColorStepSequence to
handle an array of sorted entries.

Added com::sun::star::awt::Gradient2 derived from
com::sun::star::awt::Gradient, extended by the
needed com::sun::star::awt::ColorStepSequence.

Added MID_GRADIENT_COLORSTEPSEQUENCE to UNO API
to provide access to ColorSteps directly.

Adapted XFillGradientItem::QueryValue/PutValue to
make use of new UNO API data structures. To do so,
added tooling methods for data transition:
- fillColorStepSequenceFromColorSteps
- fillGradient2FromXGradient
- fillColorStepsFromAny
- fillXGradientFromAny
and adapted
- case '0' (all data)
- MID_FILLGRADIENT
- MID_GRADIENT_COLORSTEPSEQUENCE
- MID_GRADIENT_START/ENDCOLOR
to make use of these.

Tested usage of these in the office.

Renamed from GradientStep to GradientStop after
discussions with members on the list to make this
closer related to other norms/definitions.

Also renamed classes and class members to better
reflect to GradientStop, so grepping/finding will
be easier (e.g. 'Color' just exists pretty often,
but 'StopColor' is more precise).

Changed the used UNO API class for reprsenting the
Color to better reflect to ranges [0.0 .. 1.0] and
usage of RGB.

Change-Id: I1eeb3e97e81d6785967615d1ff256551fc3b882d
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/148849
Tested-by: Jenkins
Reviewed-by: Armin Le Grand <Armin.Le.Grand@me.com>

1 files changed, 8 insertions, 8 deletions

diff --git a/drawinglayer/inc/texture/texture.hxx b/drawinglayer/inc/texture/texture.hxx
index 567a24417f51..8eff5bee261a 100644
--- a/drawinglayer/inc/texture/texture.hxx
+++ b/drawinglayer/inc/texture/texture.hxx
@@ -57,14 +57,14 @@ namespace drawinglayer::texture
             basegfx::ODFGradientInfo            maGradientInfo;
             basegfx::B2DRange                   maDefinitionRange;
             sal_uInt32                          mnRequestedSteps;
-            basegfx::ColorSteps                 mnColorSteps;
+            basegfx::ColorStops                 mnColorStops;
             double                              mfBorder;
 
         public:
             GeoTexSvxGradient(
                 const basegfx::B2DRange& rDefinitionRange,
                 sal_uInt32 nRequestedSteps,
-                const basegfx::ColorSteps& rColorSteps,
+                const basegfx::ColorStops& rColorStops,
                 double fBorder);
             virtual ~GeoTexSvxGradient() override;
 
@@ -88,7 +88,7 @@ namespace drawinglayer::texture
                 const basegfx::B2DRange& rDefinitionRange,
                 const basegfx::B2DRange& rOutputRange,
                 sal_uInt32 nRequestedSteps,
-                const basegfx::ColorSteps& rColorSteps,
+                const basegfx::ColorStops& rColorStops,
                 double fBorder,
                 double fAngle);
             virtual ~GeoTexSvxGradientLinear() override;
@@ -109,7 +109,7 @@ namespace drawinglayer::texture
                 const basegfx::B2DRange& rDefinitionRange,
                 const basegfx::B2DRange& rOutputRange,
                 sal_uInt32 nRequestedSteps,
-                const basegfx::ColorSteps& rColorSteps,
+                const basegfx::ColorStops& rColorStops,
                 double fBorder,
                 double fAngle);
             virtual ~GeoTexSvxGradientAxial() override;
@@ -126,7 +126,7 @@ namespace drawinglayer::texture
             GeoTexSvxGradientRadial(
                 const basegfx::B2DRange& rDefinitionRange,
                 sal_uInt32 nRequestedSteps,
-                const basegfx::ColorSteps& rColorSteps,
+                const basegfx::ColorStops& rColorStops,
                 double fBorder,
                 double fOffsetX,
                 double fOffsetY);
@@ -144,7 +144,7 @@ namespace drawinglayer::texture
             GeoTexSvxGradientElliptical(
                 const basegfx::B2DRange& rDefinitionRange,
                 sal_uInt32 nRequestedSteps,
-                const basegfx::ColorSteps& rColorSteps,
+                const basegfx::ColorStops& rColorStops,
                 double fBorder,
                 double fOffsetX,
                 double fOffsetY,
@@ -163,7 +163,7 @@ namespace drawinglayer::texture
             GeoTexSvxGradientSquare(
                 const basegfx::B2DRange& rDefinitionRange,
                 sal_uInt32 nRequestedSteps,
-                const basegfx::ColorSteps& rColorSteps,
+                const basegfx::ColorStops& rColorStops,
                 double fBorder,
                 double fOffsetX,
                 double fOffsetY,
@@ -182,7 +182,7 @@ namespace drawinglayer::texture
             GeoTexSvxGradientRect(
                 const basegfx::B2DRange& rDefinitionRange,
                 sal_uInt32 nRequestedSteps,
-                const basegfx::ColorSteps& rColorSteps,
+                const basegfx::ColorStops& rColorStops,
                 double fBorder,
                 double fOffsetX,
                 double fOffsetY,