1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 24 #ifndef INCLUDED_CANVAS_CANVASCUSTOMSPRITEHELPER_HXX 25 #define INCLUDED_CANVAS_CANVASCUSTOMSPRITEHELPER_HXX 26 27 #include <com/sun/star/rendering/XCustomSprite.hpp> 28 #include <com/sun/star/rendering/XPolyPolygon2D.hpp> 29 #include <basegfx/point/b2dpoint.hxx> 30 #include <basegfx/vector/b2dvector.hxx> 31 #include <basegfx/range/b2drange.hxx> 32 #include <basegfx/matrix/b2dhommatrix.hxx> 33 #include <canvas/base/spritesurface.hxx> 34 35 36 namespace canvas 37 { 38 /* Definition of CanvasCustomSpriteHelper class */ 39 40 /** Base class for an XSprite helper implementation - to be used 41 in concert with CanvasCustomSpriteBase 42 */ 43 class CanvasCustomSpriteHelper 44 { 45 public: 46 CanvasCustomSpriteHelper(); ~CanvasCustomSpriteHelper()47 virtual ~CanvasCustomSpriteHelper() {} 48 49 /** Init helper 50 51 @param rSpriteSize 52 Requested size of the sprite, as passed to the 53 XSpriteCanvas::createCustomSprite() method 54 55 @param rOwningSpriteCanvas 56 The XSpriteCanvas this sprite is displayed on 57 */ 58 void init( const ::com::sun::star::geometry::RealSize2D& rSpriteSize, 59 const SpriteSurface::Reference& rOwningSpriteCanvas ); 60 61 /** Object is being disposed, release all internal references 62 63 @derive when overriding this method in derived classes, 64 <em>always</em> call the base class' method! 65 */ 66 void disposing(); 67 68 // XCanvas 69 /// need to call this method for XCanvas::clear(), for opacity tracking 70 void clearingContent( const Sprite::Reference& rSprite ); 71 72 /// need to call this method for XCanvas::drawBitmap(), for opacity tracking 73 void checkDrawBitmap( const Sprite::Reference& rSprite, 74 const ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XBitmap >& xBitmap, 75 const ::com::sun::star::rendering::ViewState& viewState, 76 const ::com::sun::star::rendering::RenderState& renderState ); 77 78 // XSprite 79 void setAlpha( const Sprite::Reference& rSprite, 80 double alpha ); 81 void move( const Sprite::Reference& rSprite, 82 const ::com::sun::star::geometry::RealPoint2D& aNewPos, 83 const ::com::sun::star::rendering::ViewState& viewState, 84 const ::com::sun::star::rendering::RenderState& renderState ); 85 void transform( const Sprite::Reference& rSprite, 86 const ::com::sun::star::geometry::AffineMatrix2D& aTransformation ); 87 void clip( const Sprite::Reference& rSprite, 88 const ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XPolyPolygon2D >& aClip ); 89 void setPriority( const Sprite::Reference& rSprite, 90 double nPriority ); 91 void show( const Sprite::Reference& rSprite ); 92 void hide( const Sprite::Reference& rSprite ); 93 94 // Sprite 95 bool isAreaUpdateOpaque( const ::basegfx::B2DRange& rUpdateArea ) const; 96 ::basegfx::B2DPoint getPosPixel() const; 97 ::basegfx::B2DVector getSizePixel() const; 98 ::basegfx::B2DRange getUpdateArea() const; 99 double getPriority() const; 100 101 // redraw must be implemented by derived - non sensible default implementation 102 // void redraw( const Sprite::Reference& rSprite, 103 // const ::basegfx::B2DPoint& rPos ) const; 104 105 106 // Helper methods for derived classes 107 // ---------------------------------- 108 109 /// Calc sprite update area from given raw sprite bounds 110 ::basegfx::B2DRange getUpdateArea( const ::basegfx::B2DRange& rUntransformedSpriteBounds ) const; 111 112 /// Calc update area for unclipped sprite content 113 ::basegfx::B2DRange getFullSpriteRect() const; 114 115 /** Returns true, if sprite content bitmap is fully opaque. 116 117 This does not take clipping or transformation into 118 account, but only denotes that the sprite bitmap's alpha 119 channel is all 1.0 120 */ isContentFullyOpaque() const121 bool isContentFullyOpaque() const { return mbIsContentFullyOpaque; } 122 123 /// Returns true, if transformation has changed since last transformUpdated() call hasAlphaChanged() const124 bool hasAlphaChanged() const { return mbAlphaDirty; } 125 126 /// Returns true, if transformation has changed since last transformUpdated() call hasPositionChanged() const127 bool hasPositionChanged() const { return mbPositionDirty; } 128 129 /// Returns true, if transformation has changed since last transformUpdated() call hasTransformChanged() const130 bool hasTransformChanged() const { return mbTransformDirty; } 131 132 /// Returns true, if transformation has changed since last transformUpdated() call hasClipChanged() const133 bool hasClipChanged() const { return mbClipDirty; } 134 135 /// Returns true, if transformation has changed since last transformUpdated() call hasPrioChanged() const136 bool hasPrioChanged() const { return mbPrioDirty; } 137 138 /// Returns true, if transformation has changed since last transformUpdated() call hasVisibilityChanged() const139 bool hasVisibilityChanged() const { return mbVisibilityDirty; } 140 141 /// Retrieve current alpha value getAlpha() const142 double getAlpha() const { return mfAlpha; } 143 144 /// Retrieve current clip 145 const ::com::sun::star::uno::Reference< getClip() const146 ::com::sun::star::rendering::XPolyPolygon2D >& getClip() const { return mxClipPoly; } 147 getTransformation() const148 const ::basegfx::B2DHomMatrix& getTransformation() const { return maTransform; } 149 150 /// Retrieve current activation state isActive() const151 bool isActive() const { return mbActive; } 152 153 protected: 154 /** Notifies that caller is again in sync with current alph 155 156 const, but modifies state visible to derived 157 classes. beware of passing this information to the 158 outside! 159 */ alphaUpdated() const160 void alphaUpdated() const { mbAlphaDirty=false; } 161 162 /** Notifies that caller is again in sync with current position 163 164 const, but modifies state visible to derived 165 classes. beware of passing this information to the 166 outside! 167 */ positionUpdated() const168 void positionUpdated() const { mbPositionDirty=false; } 169 170 /** Notifies that caller is again in sync with current transformation 171 172 const, but modifies state visible to derived 173 classes. beware of passing this information to the 174 outside! 175 */ transformUpdated() const176 void transformUpdated() const { mbTransformDirty=false; } 177 178 /** Notifies that caller is again in sync with current clip 179 180 const, but modifies state visible to derived 181 classes. beware of passing this information to the 182 outside! 183 */ clipUpdated() const184 void clipUpdated() const { mbClipDirty=false; } 185 186 /** Notifies that caller is again in sync with current priority 187 188 const, but modifies state visible to derived 189 classes. beware of passing this information to the 190 outside! 191 */ prioUpdated() const192 void prioUpdated() const { mbPrioDirty=false; } 193 194 /** Notifies that caller is again in sync with current visibility 195 196 const, but modifies state visible to derived 197 classes. beware of passing this information to the 198 outside! 199 */ visibilityUpdated() const200 void visibilityUpdated() const { mbVisibilityDirty=false; } 201 202 private: 203 CanvasCustomSpriteHelper( const CanvasCustomSpriteHelper& ); 204 CanvasCustomSpriteHelper& operator=( const CanvasCustomSpriteHelper& ); 205 206 /** Called to convert an API polygon to a basegfx polygon 207 208 @derive Needs to be provided by backend-specific code 209 */ 210 virtual ::basegfx::B2DPolyPolygon polyPolygonFromXPolyPolygon2D( 211 ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XPolyPolygon2D >& xPoly ) const = 0; 212 213 /** Update clip information from current state 214 215 This method recomputes the maCurrClipBounds and 216 mbIsCurrClipRectangle members from the current clip and 217 transformation. IFF the clip changed from rectangular to 218 rectangular again, this method issues a sequence of 219 optimized SpriteSurface::updateSprite() calls. 220 221 @return true, if SpriteSurface::updateSprite() was already 222 called within this method. 223 */ 224 bool updateClipState( const Sprite::Reference& rSprite ); 225 226 // -------------------------------------------------------------------- 227 228 /// Owning sprite canvas 229 SpriteSurface::Reference mpSpriteCanvas; 230 231 /** Currently active clip area. 232 233 This member is either empty, denoting that the current 234 clip shows the full sprite content, or contains a 235 rectangular subarea of the sprite, outside of which 236 the sprite content is fully clipped. 237 238 @see mbIsCurrClipRectangle 239 */ 240 ::basegfx::B2DRange maCurrClipBounds; 241 242 // sprite state 243 ::basegfx::B2DPoint maPosition; 244 ::basegfx::B2DVector maSize; 245 ::basegfx::B2DHomMatrix maTransform; 246 ::com::sun::star::uno::Reference< 247 ::com::sun::star::rendering::XPolyPolygon2D > mxClipPoly; 248 double mfPriority; 249 double mfAlpha; 250 bool mbActive; // true, if not hidden 251 252 /** If true, denotes that the current sprite clip is a true 253 rectangle, i.e. maCurrClipBounds <em>exactly</em> 254 describes the visible area of the sprite. 255 256 @see maCurrClipBounds 257 */ 258 bool mbIsCurrClipRectangle; 259 260 /** Redraw speedup. 261 262 When true, this flag denotes that the current sprite 263 content is fully opaque, thus, that blits to the screen do 264 neither have to take alpha into account, nor prepare any 265 background for the sprite area. 266 */ 267 mutable bool mbIsContentFullyOpaque; 268 269 /// True, iff mfAlpha has changed 270 mutable bool mbAlphaDirty; 271 272 /// True, iff maPosition has changed 273 mutable bool mbPositionDirty; 274 275 /// True, iff maTransform has changed 276 mutable bool mbTransformDirty; 277 278 /// True, iff mxClipPoly has changed 279 mutable bool mbClipDirty; 280 281 /// True, iff mnPriority has changed 282 mutable bool mbPrioDirty; 283 284 /// True, iff mbActive has changed 285 mutable bool mbVisibilityDirty; 286 }; 287 } 288 289 #endif /* INCLUDED_CANVAS_CANVASCUSTOMSPRITEHELPER_HXX */ 290