1 | /*
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2 | * Copyright 2002-2004 The Apache Software Foundation
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3 | *
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4 | * Licensed under the Apache License, Version 2.0 (the "License");
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5 | * you may not use this file except in compliance with the License.
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6 | * You may obtain a copy of the License at
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7 | *
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8 | * http://www.apache.org/licenses/LICENSE-2.0
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9 | *
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10 | * Unless required by applicable law or agreed to in writing, software
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11 | * distributed under the License is distributed on an "AS IS" BASIS,
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 | * See the License for the specific language governing permissions and
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14 | * limitations under the License.
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15 | *
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16 | */
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17 | package org.apache.tools.ant.types.optional.image;
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18 |
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19 | import org.apache.tools.ant.types.EnumeratedAttribute;
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20 |
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21 | import javax.media.jai.JAI;
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22 | import javax.media.jai.PlanarImage;
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23 | import java.awt.image.BufferedImage;
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24 | import java.awt.image.renderable.ParameterBlock;
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25 |
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26 | /**
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27 | *
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28 | * @see org.apache.tools.ant.taskdefs.optional.image.Image
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29 | */
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30 | public class Scale extends TransformOperation implements DrawOperation {
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31 |
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32 | private String width_str = "100%";
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33 | private String height_str = "100%";
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34 | private boolean x_percent = true;
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35 | private boolean y_percent = true;
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36 | private String proportions = "ignore";
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37 |
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38 | public static class ProportionsAttribute extends EnumeratedAttribute {
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39 | public String[] getValues() {
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40 | return new String[] {"ignore", "width", "height", "cover", "fit"};
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41 | }
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42 | }
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43 |
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44 | /**
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45 | * Sets the behaviour regarding the image proportions.
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46 | */
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47 | public void setProportions(ProportionsAttribute pa) {
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48 | proportions = pa.getValue();
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49 | }
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50 |
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51 | /**
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52 | * Sets the width of the image, either as an integer or a %. Defaults to 100%.
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53 | */
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54 | public void setWidth(String width) {
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55 | width_str = width;
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56 | }
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57 |
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58 | /**
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59 | * Sets the height of the image, either as an integer or a %. Defaults to 100%.
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60 | */
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61 | public void setHeight(String height) {
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62 | height_str = height;
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63 | }
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64 |
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65 | public float getWidth() {
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66 | float width = 0.0F;
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67 | int perc_index = width_str.indexOf('%');
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68 | if (perc_index > 0) {
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69 | width = Float.parseFloat(width_str.substring(0, perc_index));
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70 | x_percent = true;
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71 | return width / 100;
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72 | } else {
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73 | x_percent = false;
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74 | return Float.parseFloat(width_str);
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75 | }
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76 | }
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77 |
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78 | public float getHeight() {
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79 | int perc_index = height_str.indexOf('%');
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80 | if (perc_index > 0) {
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81 | float height = Float.parseFloat(height_str.substring(0, perc_index));
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82 | y_percent = true;
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83 | return height / 100;
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84 | } else {
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85 | y_percent = false;
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86 | return Float.parseFloat(height_str);
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87 | }
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88 | }
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89 |
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90 | public PlanarImage performScale(PlanarImage image) {
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91 | ParameterBlock pb = new ParameterBlock();
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92 | pb.addSource(image);
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93 | float x_fl = getWidth();
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94 | float y_fl = getHeight();
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95 |
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96 | if (!x_percent) {
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97 | x_fl = (x_fl / image.getWidth());
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98 | }
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99 | if (!y_percent) {
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100 | y_fl = (y_fl / image.getHeight());
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101 | }
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102 |
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103 | if ("width".equals(proportions)) {
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104 | y_fl = x_fl;
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105 | } else if ("height".equals(proportions)) {
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106 | x_fl = y_fl;
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107 | } else if ("fit".equals(proportions)) {
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108 | x_fl = y_fl = Math.min(x_fl, y_fl);
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109 | } else if ("cover".equals(proportions)) {
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110 | x_fl = y_fl = Math.max(x_fl, y_fl);
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111 | }
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112 |
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113 | pb.add(new Float(x_fl));
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114 | pb.add(new Float(y_fl));
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115 |
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116 | log("\tScaling to " + (x_fl * 100) + "% x " + (y_fl * 100) + "%");
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117 |
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118 | return JAI.create("scale", pb);
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119 | }
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120 |
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121 |
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122 | public PlanarImage executeTransformOperation(PlanarImage image) {
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123 | BufferedImage bi = null;
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124 | for (int i = 0; i < instructions.size(); i++) {
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125 | ImageOperation instr = ((ImageOperation) instructions.elementAt(i));
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126 | if (instr instanceof DrawOperation) {
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127 | return performScale(image);
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128 | } else if (instr instanceof TransformOperation) {
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129 | bi = image.getAsBufferedImage();
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130 | image = ((TransformOperation) instr).executeTransformOperation(PlanarImage.wrapRenderedImage(bi));
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131 | bi = image.getAsBufferedImage();
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132 | }
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133 | }
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134 | return performScale(image);
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135 | }
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136 |
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137 |
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138 | public PlanarImage executeDrawOperation() {
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139 | for (int i = 0; i < instructions.size(); i++) {
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140 | ImageOperation instr = ((ImageOperation) instructions.elementAt(i));
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141 | if (instr instanceof DrawOperation) {
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142 | PlanarImage image = null;
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143 | // If this TransformOperation has DrawOperation children
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144 | // then Rotate the first child and return.
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145 | performScale(image);
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146 | return image;
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147 | }
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148 | }
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149 | return null;
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150 | }
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151 | }
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