is a Java PDF library tool that allows creation of new PDF documents, manipulation of existing documents and the ability to extract content from documents.
| Type4ShadingContext.java (pdfbox-2.0.23-src) | : | Type4ShadingContext.java (pdfbox-2.0.24-src) |
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| | |
| skipping to change at line 21 | | skipping to change at line 21 |
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| * Unless required by applicable law or agreed to in writing, software | | * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, | | * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and | | * See the License for the specific language governing permissions and |
| * limitations under the License. | | * limitations under the License. |
| */ | | */ |
| package org.apache.pdfbox.pdmodel.graphics.shading; | | package org.apache.pdfbox.pdmodel.graphics.shading; |
| | |
| import java.awt.Rectangle; | | import java.awt.Rectangle; |
| import java.awt.geom.AffineTransform; | | import java.awt.geom.AffineTransform; |
|
| import java.awt.geom.Point2D; | | |
| import java.awt.image.ColorModel; | | import java.awt.image.ColorModel; |
|
| import java.io.EOFException; | | |
| import java.io.IOException; | | import java.io.IOException; |
|
| import java.util.ArrayList; | | |
| import java.util.Collections; | | |
| import java.util.List; | | |
| import javax.imageio.stream.ImageInputStream; | | |
| import javax.imageio.stream.MemoryCacheImageInputStream; | | |
| import org.apache.commons.logging.Log; | | import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; | | import org.apache.commons.logging.LogFactory; |
|
| import org.apache.pdfbox.cos.COSDictionary; | | |
| import org.apache.pdfbox.cos.COSStream; | | |
| import org.apache.pdfbox.pdmodel.common.PDRange; | | |
| import org.apache.pdfbox.util.Matrix; | | import org.apache.pdfbox.util.Matrix; |
| | |
| /** | | /** |
| * AWT PaintContext for Gouraud Triangle Mesh (Type 4) shading. | | * AWT PaintContext for Gouraud Triangle Mesh (Type 4) shading. |
| * | | * |
| * @author Tilman Hausherr | | * @author Tilman Hausherr |
| * @author Shaola Ren | | * @author Shaola Ren |
| */ | | */ |
| class Type4ShadingContext extends GouraudShadingContext | | class Type4ShadingContext extends GouraudShadingContext |
| { | | { |
| | |
| skipping to change at line 65 | | skipping to change at line 56 |
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| */ | | */ |
| Type4ShadingContext(PDShadingType4 shading, ColorModel cm, AffineTransform x
form, | | Type4ShadingContext(PDShadingType4 shading, ColorModel cm, AffineTransform x
form, |
| Matrix matrix, Rectangle deviceBounds) throws IOE
xception | | Matrix matrix, Rectangle deviceBounds) throws IOE
xception |
| { | | { |
| super(shading, cm, xform, matrix); | | super(shading, cm, xform, matrix); |
| LOG.debug("Type4ShadingContext"); | | LOG.debug("Type4ShadingContext"); |
| | |
| bitsPerFlag = shading.getBitsPerFlag(); | | bitsPerFlag = shading.getBitsPerFlag(); |
| //TODO handle cases where bitperflag isn't 8 | | //TODO handle cases where bitperflag isn't 8 |
| LOG.debug("bitsPerFlag: " + bitsPerFlag); | | LOG.debug("bitsPerFlag: " + bitsPerFlag); |
|
| setTriangleList(collectTriangles(shading, xform, matrix)); | | setTriangleList(shading.collectTriangles(xform, matrix)); |
| createPixelTable(deviceBounds); | | createPixelTable(deviceBounds); |
| } | | } |
|
| | | |
| private List<ShadedTriangle> collectTriangles(PDShadingType4 freeTriangleSha | | |
| dingType, AffineTransform xform, Matrix matrix) | | |
| throws IOException | | |
| { | | |
| COSDictionary dict = freeTriangleShadingType.getCOSObject(); | | |
| if (!(dict instanceof COSStream)) | | |
| { | | |
| return Collections.emptyList(); | | |
| } | | |
| PDRange rangeX = freeTriangleShadingType.getDecodeForParameter(0); | | |
| PDRange rangeY = freeTriangleShadingType.getDecodeForParameter(1); | | |
| if (Float.compare(rangeX.getMin(), rangeX.getMax()) == 0 || | | |
| Float.compare(rangeY.getMin(), rangeY.getMax()) == 0) | | |
| { | | |
| return Collections.emptyList(); | | |
| } | | |
| PDRange[] colRange = new PDRange[numberOfColorComponents]; | | |
| for (int i = 0; i < numberOfColorComponents; ++i) | | |
| { | | |
| colRange[i] = freeTriangleShadingType.getDecodeForParameter(2 + i); | | |
| } | | |
| List<ShadedTriangle> list = new ArrayList<ShadedTriangle>(); | | |
| long maxSrcCoord = (long) Math.pow(2, bitsPerCoordinate) - 1; | | |
| long maxSrcColor = (long) Math.pow(2, bitsPerColorComponent) - 1; | | |
| COSStream stream = (COSStream) dict; | | |
| | |
| ImageInputStream mciis = new MemoryCacheImageInputStream(stream.createIn | | |
| putStream()); | | |
| try | | |
| { | | |
| byte flag = (byte) 0; | | |
| try | | |
| { | | |
| flag = (byte) (mciis.readBits(bitsPerFlag) & 3); | | |
| } | | |
| catch (EOFException ex) | | |
| { | | |
| LOG.error(ex); | | |
| } | | |
| | |
| boolean eof = false; | | |
| while (!eof) | | |
| { | | |
| Vertex p0, p1, p2; | | |
| Point2D[] ps; | | |
| float[][] cs; | | |
| int lastIndex; | | |
| try | | |
| { | | |
| switch (flag) | | |
| { | | |
| case 0: | | |
| p0 = readVertex(mciis, maxSrcCoord, maxSrcColor, ran | | |
| geX, rangeY, colRange, | | |
| matrix, xform); | | |
| flag = (byte) (mciis.readBits(bitsPerFlag) & 3); | | |
| if (flag != 0) | | |
| { | | |
| LOG.error("bad triangle: " + flag); | | |
| } | | |
| p1 = readVertex(mciis, maxSrcCoord, maxSrcColor, ran | | |
| geX, rangeY, colRange, | | |
| matrix, xform); | | |
| mciis.readBits(bitsPerFlag); | | |
| if (flag != 0) | | |
| { | | |
| LOG.error("bad triangle: " + flag); | | |
| } | | |
| p2 = readVertex(mciis, maxSrcCoord, maxSrcColor, ran | | |
| geX, rangeY, colRange, | | |
| matrix, xform); | | |
| ps = new Point2D[] { p0.point, p1.point, p2.point }; | | |
| cs = new float[][] { p0.color, p1.color, p2.color }; | | |
| list.add(new ShadedTriangle(ps, cs)); | | |
| flag = (byte) (mciis.readBits(bitsPerFlag) & 3); | | |
| break; | | |
| case 1: | | |
| case 2: | | |
| lastIndex = list.size() - 1; | | |
| if (lastIndex < 0) | | |
| { | | |
| LOG.error("broken data stream: " + list.size()); | | |
| } | | |
| else | | |
| { | | |
| ShadedTriangle preTri = list.get(lastIndex); | | |
| p2 = readVertex(mciis, maxSrcCoord, maxSrcColor, | | |
| rangeX, rangeY, | | |
| colRange, matrix, xform); | | |
| ps = new Point2D[] { flag == 1 ? preTri.corner[1 | | |
| ] : preTri.corner[0], | | |
| preTri.corner[2], | | |
| p2.point }; | | |
| cs = new float[][] { flag == 1 ? preTri.color[1] | | |
| : preTri.color[0], | | |
| preTri.color[2], | | |
| p2.color }; | | |
| list.add(new ShadedTriangle(ps, cs)); | | |
| flag = (byte) (mciis.readBits(bitsPerFlag) & 3); | | |
| } | | |
| break; | | |
| default: | | |
| LOG.warn("bad flag: " + flag); | | |
| break; | | |
| } | | |
| } | | |
| catch (EOFException ex) | | |
| { | | |
| eof = true; | | |
| } | | |
| } | | |
| } | | |
| finally | | |
| { | | |
| mciis.close(); | | |
| } | | |
| return list; | | |
| } | | |
| } | | } |
| | | |
| End of changes. 6 change blocks. |
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| 130 lines changed or deleted | | 2 lines changed or added |
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