Alan Viverette | 3da604b | 2020-06-10 18:34:39 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.gallery3d.glrenderer; |
| 18 | |
| 19 | import android.graphics.Bitmap; |
| 20 | import android.graphics.Bitmap.Config; |
| 21 | import android.opengl.GLUtils; |
| 22 | |
| 23 | import com.android.gallery3d.common.Utils; |
| 24 | |
| 25 | import java.util.HashMap; |
| 26 | |
| 27 | import javax.microedition.khronos.opengles.GL11; |
| 28 | |
| 29 | // UploadedTextures use a Bitmap for the content of the texture. |
| 30 | // |
| 31 | // Subclasses should implement onGetBitmap() to provide the Bitmap and |
| 32 | // implement onFreeBitmap(mBitmap) which will be called when the Bitmap |
| 33 | // is not needed anymore. |
| 34 | // |
| 35 | // isContentValid() is meaningful only when the isLoaded() returns true. |
| 36 | // It means whether the content needs to be updated. |
| 37 | // |
| 38 | // The user of this class should call recycle() when the texture is not |
| 39 | // needed anymore. |
| 40 | // |
| 41 | // By default an UploadedTexture is opaque (so it can be drawn faster without |
| 42 | // blending). The user or subclass can override it using setOpaque(). |
| 43 | public abstract class UploadedTexture extends BasicTexture { |
| 44 | |
| 45 | // To prevent keeping allocation the borders, we store those used borders here. |
| 46 | // Since the length will be power of two, it won't use too much memory. |
| 47 | private static HashMap<BorderKey, Bitmap> sBorderLines = |
| 48 | new HashMap<BorderKey, Bitmap>(); |
| 49 | private static BorderKey sBorderKey = new BorderKey(); |
| 50 | |
| 51 | @SuppressWarnings("unused") |
| 52 | private static final String TAG = "Texture"; |
| 53 | private boolean mContentValid = true; |
| 54 | |
| 55 | // indicate this textures is being uploaded in background |
| 56 | private boolean mIsUploading = false; |
| 57 | private boolean mOpaque = true; |
| 58 | private boolean mThrottled = false; |
| 59 | private static int sUploadedCount; |
| 60 | private static final int UPLOAD_LIMIT = 100; |
| 61 | |
| 62 | protected Bitmap mBitmap; |
| 63 | private int mBorder; |
| 64 | |
| 65 | protected UploadedTexture() { |
| 66 | this(false); |
| 67 | } |
| 68 | |
| 69 | protected UploadedTexture(boolean hasBorder) { |
| 70 | super(null, 0, STATE_UNLOADED); |
| 71 | if (hasBorder) { |
| 72 | setBorder(true); |
| 73 | mBorder = 1; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | protected void setIsUploading(boolean uploading) { |
| 78 | mIsUploading = uploading; |
| 79 | } |
| 80 | |
| 81 | public boolean isUploading() { |
| 82 | return mIsUploading; |
| 83 | } |
| 84 | |
| 85 | private static class BorderKey implements Cloneable { |
| 86 | public boolean vertical; |
| 87 | public Config config; |
| 88 | public int length; |
| 89 | |
| 90 | @Override |
| 91 | public int hashCode() { |
| 92 | int x = config.hashCode() ^ length; |
| 93 | return vertical ? x : -x; |
| 94 | } |
| 95 | |
| 96 | @Override |
| 97 | public boolean equals(Object object) { |
| 98 | if (!(object instanceof BorderKey)) return false; |
| 99 | BorderKey o = (BorderKey) object; |
| 100 | return vertical == o.vertical |
| 101 | && config == o.config && length == o.length; |
| 102 | } |
| 103 | |
| 104 | @Override |
| 105 | public BorderKey clone() { |
| 106 | try { |
| 107 | return (BorderKey) super.clone(); |
| 108 | } catch (CloneNotSupportedException e) { |
| 109 | throw new AssertionError(e); |
| 110 | } |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | protected void setThrottled(boolean throttled) { |
| 115 | mThrottled = throttled; |
| 116 | } |
| 117 | |
| 118 | private static Bitmap getBorderLine( |
| 119 | boolean vertical, Config config, int length) { |
| 120 | BorderKey key = sBorderKey; |
| 121 | key.vertical = vertical; |
| 122 | key.config = config; |
| 123 | key.length = length; |
| 124 | Bitmap bitmap = sBorderLines.get(key); |
| 125 | if (bitmap == null) { |
| 126 | bitmap = vertical |
| 127 | ? Bitmap.createBitmap(1, length, config) |
| 128 | : Bitmap.createBitmap(length, 1, config); |
| 129 | sBorderLines.put(key.clone(), bitmap); |
| 130 | } |
| 131 | return bitmap; |
| 132 | } |
| 133 | |
| 134 | private Bitmap getBitmap() { |
| 135 | if (mBitmap == null) { |
| 136 | mBitmap = onGetBitmap(); |
| 137 | int w = mBitmap.getWidth() + mBorder * 2; |
| 138 | int h = mBitmap.getHeight() + mBorder * 2; |
| 139 | if (mWidth == UNSPECIFIED) { |
| 140 | setSize(w, h); |
| 141 | } |
| 142 | } |
| 143 | return mBitmap; |
| 144 | } |
| 145 | |
| 146 | private void freeBitmap() { |
| 147 | Utils.assertTrue(mBitmap != null); |
| 148 | onFreeBitmap(mBitmap); |
| 149 | mBitmap = null; |
| 150 | } |
| 151 | |
| 152 | @Override |
| 153 | public int getWidth() { |
| 154 | if (mWidth == UNSPECIFIED) getBitmap(); |
| 155 | return mWidth; |
| 156 | } |
| 157 | |
| 158 | @Override |
| 159 | public int getHeight() { |
| 160 | if (mWidth == UNSPECIFIED) getBitmap(); |
| 161 | return mHeight; |
| 162 | } |
| 163 | |
| 164 | protected abstract Bitmap onGetBitmap(); |
| 165 | |
| 166 | protected abstract void onFreeBitmap(Bitmap bitmap); |
| 167 | |
| 168 | protected void invalidateContent() { |
| 169 | if (mBitmap != null) freeBitmap(); |
| 170 | mContentValid = false; |
| 171 | mWidth = UNSPECIFIED; |
| 172 | mHeight = UNSPECIFIED; |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * Whether the content on GPU is valid. |
| 177 | */ |
| 178 | public boolean isContentValid() { |
| 179 | return isLoaded() && mContentValid; |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * Updates the content on GPU's memory. |
| 184 | * @param canvas |
| 185 | */ |
| 186 | public void updateContent(GLCanvas canvas) { |
| 187 | if (!isLoaded()) { |
| 188 | if (mThrottled && ++sUploadedCount > UPLOAD_LIMIT) { |
| 189 | return; |
| 190 | } |
| 191 | uploadToCanvas(canvas); |
| 192 | } else if (!mContentValid) { |
| 193 | Bitmap bitmap = getBitmap(); |
| 194 | int format = GLUtils.getInternalFormat(bitmap); |
| 195 | int type = GLUtils.getType(bitmap); |
| 196 | canvas.texSubImage2D(this, mBorder, mBorder, bitmap, format, type); |
| 197 | freeBitmap(); |
| 198 | mContentValid = true; |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | public static void resetUploadLimit() { |
| 203 | sUploadedCount = 0; |
| 204 | } |
| 205 | |
| 206 | public static boolean uploadLimitReached() { |
| 207 | return sUploadedCount > UPLOAD_LIMIT; |
| 208 | } |
| 209 | |
| 210 | private void uploadToCanvas(GLCanvas canvas) { |
| 211 | |
| 212 | Bitmap bitmap = getBitmap(); |
| 213 | if (bitmap != null) { |
| 214 | try { |
| 215 | int bWidth = bitmap.getWidth(); |
| 216 | int bHeight = bitmap.getHeight(); |
| 217 | int width = bWidth + mBorder * 2; |
| 218 | int height = bHeight + mBorder * 2; |
| 219 | int texWidth = getTextureWidth(); |
| 220 | int texHeight = getTextureHeight(); |
| 221 | |
| 222 | Utils.assertTrue(bWidth <= texWidth && bHeight <= texHeight); |
| 223 | |
| 224 | // Upload the bitmap to a new texture. |
| 225 | mId = canvas.getGLId().generateTexture(); |
| 226 | canvas.setTextureParameters(this); |
| 227 | |
| 228 | if (bWidth == texWidth && bHeight == texHeight) { |
| 229 | canvas.initializeTexture(this, bitmap); |
| 230 | } else { |
| 231 | int format = GLUtils.getInternalFormat(bitmap); |
| 232 | int type = GLUtils.getType(bitmap); |
| 233 | Config config = bitmap.getConfig(); |
| 234 | |
| 235 | canvas.initializeTextureSize(this, format, type); |
| 236 | canvas.texSubImage2D(this, mBorder, mBorder, bitmap, format, type); |
| 237 | |
| 238 | if (mBorder > 0) { |
| 239 | // Left border |
| 240 | Bitmap line = getBorderLine(true, config, texHeight); |
| 241 | canvas.texSubImage2D(this, 0, 0, line, format, type); |
| 242 | |
| 243 | // Top border |
| 244 | line = getBorderLine(false, config, texWidth); |
| 245 | canvas.texSubImage2D(this, 0, 0, line, format, type); |
| 246 | } |
| 247 | |
| 248 | // Right border |
| 249 | if (mBorder + bWidth < texWidth) { |
| 250 | Bitmap line = getBorderLine(true, config, texHeight); |
| 251 | canvas.texSubImage2D(this, mBorder + bWidth, 0, line, format, type); |
| 252 | } |
| 253 | |
| 254 | // Bottom border |
| 255 | if (mBorder + bHeight < texHeight) { |
| 256 | Bitmap line = getBorderLine(false, config, texWidth); |
| 257 | canvas.texSubImage2D(this, 0, mBorder + bHeight, line, format, type); |
| 258 | } |
| 259 | } |
| 260 | } finally { |
| 261 | freeBitmap(); |
| 262 | } |
| 263 | // Update texture state. |
| 264 | setAssociatedCanvas(canvas); |
| 265 | mState = STATE_LOADED; |
| 266 | mContentValid = true; |
| 267 | } else { |
| 268 | mState = STATE_ERROR; |
| 269 | throw new RuntimeException("Texture load fail, no bitmap"); |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | @Override |
| 274 | protected boolean onBind(GLCanvas canvas) { |
| 275 | updateContent(canvas); |
| 276 | return isContentValid(); |
| 277 | } |
| 278 | |
| 279 | @Override |
| 280 | protected int getTarget() { |
| 281 | return GL11.GL_TEXTURE_2D; |
| 282 | } |
| 283 | |
| 284 | public void setOpaque(boolean isOpaque) { |
| 285 | mOpaque = isOpaque; |
| 286 | } |
| 287 | |
| 288 | @Override |
| 289 | public boolean isOpaque() { |
| 290 | return mOpaque; |
| 291 | } |
| 292 | |
| 293 | @Override |
| 294 | public void recycle() { |
| 295 | super.recycle(); |
| 296 | if (mBitmap != null) freeBitmap(); |
| 297 | } |
| 298 | } |