1268 // hijack it right here to start with. Note that any of the calls
1269 // in computeDirtyRegion might end up changing the region instance
1270 // from dirtyRegionTemp (which is a RectBounds) to a BoxBounds if any
1271 // of the other bounds / transforms involve a perspective transformation.
1272 BaseBounds region = dirtyRegionTemp;
1273 if (!dirtyBounds.isEmpty()) {
1274 region = region.deriveWithNewBounds(dirtyBounds);
1275 } else {
1276 // If dirtyBounds is empty, then we will simply set the bounds to
1277 // be the same as the transformedBounds (since that means the bounds
1278 // haven't changed and right now we don't support dirty sub regions
1279 // for generic nodes). This can happen if, for example, this is
1280 // a group with a clip and the dirty area of child nodes within
1281 // the group exceeds the bounds of the clip on the group. Just trust me.
1282 region = region.deriveWithNewBounds(transformedBounds);
1283 }
1284
1285 // We shouldn't do anything with empty region, as we may accidentally make
1286 // it non empty or turn it into some nonsense (like (-1,-1,0,0) )
1287 if (!region.isEmpty()) {
1288 // Now that we have the dirty region, we will simply apply the tx
1289 // to it (after slightly padding it for good luck) to get the scene
1290 // coordinates for this.
1291 region = computePadding(region);
1292 region = tx.transform(region, region);
1293 region = pvTx.transform(region, region);
1294 }
1295 return region;
1296 }
1297
1298 /**
1299 * LCD Text creates some painful situations where, due to the LCD text
1300 * algorithm, we end up with some pixels touched that are normally outside
1301 * the bounds. To compensate, we need a hook for NGText to add padding.
1302 */
1303 protected BaseBounds computePadding(BaseBounds region) {
1304 return region;
1305 }
1306
1307 /**
|
1268 // hijack it right here to start with. Note that any of the calls
1269 // in computeDirtyRegion might end up changing the region instance
1270 // from dirtyRegionTemp (which is a RectBounds) to a BoxBounds if any
1271 // of the other bounds / transforms involve a perspective transformation.
1272 BaseBounds region = dirtyRegionTemp;
1273 if (!dirtyBounds.isEmpty()) {
1274 region = region.deriveWithNewBounds(dirtyBounds);
1275 } else {
1276 // If dirtyBounds is empty, then we will simply set the bounds to
1277 // be the same as the transformedBounds (since that means the bounds
1278 // haven't changed and right now we don't support dirty sub regions
1279 // for generic nodes). This can happen if, for example, this is
1280 // a group with a clip and the dirty area of child nodes within
1281 // the group exceeds the bounds of the clip on the group. Just trust me.
1282 region = region.deriveWithNewBounds(transformedBounds);
1283 }
1284
1285 // We shouldn't do anything with empty region, as we may accidentally make
1286 // it non empty or turn it into some nonsense (like (-1,-1,0,0) )
1287 if (!region.isEmpty()) {
1288 // In case we have a valid cache, there might be sub-pixel differences between the computed
1289 // transformedBounds (and consequently also dirtyBounds) and the bounds of the cache.
1290 // At this point, we still don't know for sure if the cache fill be used (or if it will be recomputed).
1291 // For finding that out and then for computing the new cache bounds, we'd need to analyze the current tx
1292 // (using "unmatrix" of CacheFilter). Since the gain of tight bounds would be probably very low and so not
1293 // worth an extra computation, we just round out the region right here.
1294 if (cacheFilter != null && !tx.isTranslateOrIdentity()) {
1295 region.roundOut();
1296 }
1297 // Now that we have the dirty region, we will simply apply the tx
1298 // to it (after slightly padding it for good luck) to get the scene
1299 // coordinates for this.
1300 region = computePadding(region);
1301 region = tx.transform(region, region);
1302 region = pvTx.transform(region, region);
1303 }
1304 return region;
1305 }
1306
1307 /**
1308 * LCD Text creates some painful situations where, due to the LCD text
1309 * algorithm, we end up with some pixels touched that are normally outside
1310 * the bounds. To compensate, we need a hook for NGText to add padding.
1311 */
1312 protected BaseBounds computePadding(BaseBounds region) {
1313 return region;
1314 }
1315
1316 /**
|