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1 /* |
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2 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 package sun.java2d.metal; |
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26 |
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27 import sun.java2d.SunGraphics2D; |
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28 import sun.java2d.SurfaceData; |
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29 import sun.java2d.loops.CompositeType; |
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30 |
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31 import java.awt.*; |
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32 import java.awt.MultipleGradientPaint.ColorSpaceType; |
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33 import java.awt.MultipleGradientPaint.CycleMethod; |
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34 import java.awt.image.BufferedImage; |
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35 import java.util.HashMap; |
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36 import java.util.Map; |
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37 |
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38 import static sun.java2d.metal.MTLContext.MTLContextCaps.CAPS_EXT_GRAD_SHADER; |
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39 import static sun.java2d.pipe.BufferedPaints.MULTI_MAX_FRACTIONS; |
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40 |
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41 abstract class MTLPaints { |
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42 |
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43 /** |
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44 * Holds all registered implementations, using the corresponding |
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45 * SunGraphics2D.PAINT_* constant as the hash key. |
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46 */ |
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47 private static Map<Integer, MTLPaints> impls = |
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48 new HashMap<Integer, MTLPaints>(4, 1.0f); |
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49 |
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50 static { |
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51 impls.put(SunGraphics2D.PAINT_GRADIENT, new Gradient()); |
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52 impls.put(SunGraphics2D.PAINT_LIN_GRADIENT, new LinearGradient()); |
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53 impls.put(SunGraphics2D.PAINT_RAD_GRADIENT, new RadialGradient()); |
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54 impls.put(SunGraphics2D.PAINT_TEXTURE, new Texture()); |
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55 } |
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56 |
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57 /** |
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58 * Attempts to locate an implementation corresponding to the paint state |
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59 * of the provided SunGraphics2D object. If no implementation can be |
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60 * found, or if the paint cannot be accelerated under the conditions |
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61 * of the SunGraphics2D, this method returns false; otherwise, returns |
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62 * true. |
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63 */ |
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64 static boolean isValid(SunGraphics2D sg2d) { |
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65 MTLPaints impl = impls.get(sg2d.paintState); |
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66 return (impl != null && impl.isPaintValid(sg2d)); |
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67 } |
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68 |
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69 /** |
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70 * Returns true if this implementation is able to accelerate the |
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71 * Paint object associated with, and under the conditions of, the |
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72 * provided SunGraphics2D instance; otherwise returns false. |
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73 */ |
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74 abstract boolean isPaintValid(SunGraphics2D sg2d); |
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75 |
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76 /************************* GradientPaint support ****************************/ |
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77 |
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78 private static class Gradient extends MTLPaints { |
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79 private Gradient() {} |
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80 |
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81 /** |
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82 * There are no restrictions for accelerating GradientPaint, so |
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83 * this method always returns true. |
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84 */ |
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85 @Override |
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86 boolean isPaintValid(SunGraphics2D sg2d) { |
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87 return true; |
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88 } |
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89 } |
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90 |
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91 /************************** TexturePaint support ****************************/ |
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92 |
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93 private static class Texture extends MTLPaints { |
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94 private Texture() {} |
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95 |
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96 /** |
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97 * Returns true if the given TexturePaint instance can be used by the |
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98 * accelerated MTLPaints.Texture implementation. A TexturePaint is |
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99 * considered valid if the following conditions are met: |
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100 * - the texture image dimensions are power-of-two (or the |
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101 * GL_ARB_texture_non_power_of_two extension is present) |
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102 * - the texture image can be (or is already) cached in an OpenGL |
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103 * texture object |
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104 */ |
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105 @Override |
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106 boolean isPaintValid(SunGraphics2D sg2d) { |
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107 TexturePaint paint = (TexturePaint)sg2d.paint; |
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108 MTLSurfaceData dstData = (MTLSurfaceData)sg2d.surfaceData; |
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109 BufferedImage bi = paint.getImage(); |
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110 |
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111 // see if texture-non-pow2 extension is available |
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112 if (!dstData.isTexNonPow2Available()) { |
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113 int imgw = bi.getWidth(); |
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114 int imgh = bi.getHeight(); |
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115 |
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116 // verify that the texture image dimensions are pow2 |
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117 if ((imgw & (imgw - 1)) != 0 || (imgh & (imgh - 1)) != 0) { |
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118 return false; |
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119 } |
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120 } |
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121 |
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122 SurfaceData srcData = |
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123 dstData.getSourceSurfaceData(bi, |
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124 SunGraphics2D.TRANSFORM_ISIDENT, |
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125 CompositeType.SrcOver, null); |
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126 if (!(srcData instanceof MTLSurfaceData)) { |
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127 // REMIND: this is a hack that attempts to cache the system |
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128 // memory image from the TexturePaint instance into an |
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129 // OpenGL texture... |
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130 srcData = |
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131 dstData.getSourceSurfaceData(bi, |
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132 SunGraphics2D.TRANSFORM_ISIDENT, |
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133 CompositeType.SrcOver, null); |
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134 if (!(srcData instanceof MTLSurfaceData)) { |
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135 return false; |
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136 } |
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137 } |
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138 |
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139 // verify that the source surface is actually a texture |
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140 MTLSurfaceData oglData = (MTLSurfaceData)srcData; |
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141 if (oglData.getType() != MTLSurfaceData.TEXTURE) { |
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142 return false; |
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143 } |
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144 |
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145 return true; |
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146 } |
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147 } |
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148 |
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149 /****************** Shared MultipleGradientPaint support ********************/ |
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150 |
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151 private abstract static class MultiGradient extends MTLPaints { |
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152 protected MultiGradient() {} |
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153 |
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154 /** |
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155 * Returns true if the given MultipleGradientPaint instance can be |
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156 * used by the accelerated MTLPaints.MultiGradient implementation. |
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157 * A MultipleGradientPaint is considered valid if the following |
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158 * conditions are met: |
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159 * - the number of gradient "stops" is <= MAX_FRACTIONS |
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160 * - the destination has support for fragment shaders |
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161 */ |
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162 @Override |
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163 boolean isPaintValid(SunGraphics2D sg2d) { |
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164 MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint; |
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165 // REMIND: ugh, this creates garbage; would be nicer if |
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166 // we had a MultipleGradientPaint.getNumStops() method... |
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167 if (paint.getFractions().length > MULTI_MAX_FRACTIONS) { |
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168 return false; |
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169 } |
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170 |
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171 MTLSurfaceData dstData = (MTLSurfaceData)sg2d.surfaceData; |
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172 MTLGraphicsConfig gc = dstData.getMTLGraphicsConfig(); |
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173 if (!gc.isCapPresent(CAPS_EXT_GRAD_SHADER)) { |
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174 return false; |
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175 } |
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176 |
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177 return true; |
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178 } |
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179 } |
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180 |
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181 /********************** LinearGradientPaint support *************************/ |
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182 |
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183 private static class LinearGradient extends MultiGradient { |
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184 private LinearGradient() {} |
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185 |
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186 @Override |
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187 boolean isPaintValid(SunGraphics2D sg2d) { |
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188 LinearGradientPaint paint = (LinearGradientPaint)sg2d.paint; |
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189 |
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190 if (paint.getFractions().length == 2 && |
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191 paint.getCycleMethod() != CycleMethod.REPEAT && |
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192 paint.getColorSpace() != ColorSpaceType.LINEAR_RGB) |
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193 { |
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194 // we can delegate to the optimized two-color gradient |
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195 // codepath, which does not require fragment shader support |
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196 return true; |
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197 } |
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198 |
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199 return super.isPaintValid(sg2d); |
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200 } |
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201 } |
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202 |
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203 /********************** RadialGradientPaint support *************************/ |
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204 |
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205 private static class RadialGradient extends MultiGradient { |
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206 private RadialGradient() {} |
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207 } |
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208 } |