reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame^] | 1 | #include "SkImageView.h" |
| 2 | #include "SkAnimator.h" |
| 3 | #include "SkBitmap.h" |
| 4 | #include "SkCanvas.h" |
| 5 | #include "SkImageDecoder.h" |
| 6 | #include "SkMatrix.h" |
| 7 | #include "SkSystemEventTypes.h" |
| 8 | #include "SkTime.h" |
| 9 | |
| 10 | SkImageView::SkImageView() |
| 11 | { |
| 12 | fMatrix = nil; |
| 13 | fScaleType = kMatrix_ScaleType; |
| 14 | |
| 15 | fData.fAnim = nil; // handles initializing the other union values |
| 16 | fDataIsAnim = true; |
| 17 | |
| 18 | fUriIsValid = false; // an empty string is not valid |
| 19 | } |
| 20 | |
| 21 | SkImageView::~SkImageView() |
| 22 | { |
| 23 | if (fMatrix) |
| 24 | sk_free(fMatrix); |
| 25 | |
| 26 | this->freeData(); |
| 27 | } |
| 28 | |
| 29 | void SkImageView::getUri(SkString* uri) const |
| 30 | { |
| 31 | if (uri) |
| 32 | *uri = fUri; |
| 33 | } |
| 34 | |
| 35 | void SkImageView::setUri(const char uri[]) |
| 36 | { |
| 37 | if (!fUri.equals(uri)) |
| 38 | { |
| 39 | fUri.set(uri); |
| 40 | this->onUriChange(); |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | void SkImageView::setUri(const SkString& uri) |
| 45 | { |
| 46 | if (fUri != uri) |
| 47 | { |
| 48 | fUri = uri; |
| 49 | this->onUriChange(); |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | void SkImageView::setScaleType(ScaleType st) |
| 54 | { |
| 55 | SkASSERT((unsigned)st <= kFitEnd_ScaleType); |
| 56 | |
| 57 | if ((ScaleType)fScaleType != st) |
| 58 | { |
| 59 | fScaleType = SkToU8(st); |
| 60 | if (fUriIsValid) |
| 61 | this->inval(nil); |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | bool SkImageView::getImageMatrix(SkMatrix* matrix) const |
| 66 | { |
| 67 | if (fMatrix) |
| 68 | { |
| 69 | SkASSERT(!fMatrix->isIdentity()); |
| 70 | if (matrix) |
| 71 | *matrix = *fMatrix; |
| 72 | return true; |
| 73 | } |
| 74 | else |
| 75 | { |
| 76 | if (matrix) |
| 77 | matrix->reset(); |
| 78 | return false; |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | void SkImageView::setImageMatrix(const SkMatrix* matrix) |
| 83 | { |
| 84 | bool changed = false; |
| 85 | |
| 86 | if (matrix && !matrix->isIdentity()) |
| 87 | { |
| 88 | if (fMatrix == nil) |
| 89 | fMatrix = (SkMatrix*)sk_malloc_throw(sizeof(SkMatrix)); |
| 90 | *fMatrix = *matrix; |
| 91 | changed = true; |
| 92 | } |
| 93 | else // set us to identity |
| 94 | { |
| 95 | if (fMatrix) |
| 96 | { |
| 97 | SkASSERT(!fMatrix->isIdentity()); |
| 98 | sk_free(fMatrix); |
| 99 | fMatrix = nil; |
| 100 | changed = true; |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | // only redraw if we changed our matrix and we're not in scaleToFit mode |
| 105 | if (changed && this->getScaleType() == kMatrix_ScaleType && fUriIsValid) |
| 106 | this->inval(nil); |
| 107 | } |
| 108 | |
| 109 | /////////////////////////////////////////////////////////////////////////////////////////////// |
| 110 | |
| 111 | bool SkImageView::onEvent(const SkEvent& evt) |
| 112 | { |
| 113 | if (evt.isType(SK_EventType_Inval)) |
| 114 | { |
| 115 | if (fUriIsValid) |
| 116 | this->inval(nil); |
| 117 | return true; |
| 118 | } |
| 119 | return this->INHERITED::onEvent(evt); |
| 120 | } |
| 121 | |
| 122 | static inline SkMatrix::ScaleToFit scaleTypeToScaleToFit(SkImageView::ScaleType st) |
| 123 | { |
| 124 | SkASSERT(st != SkImageView::kMatrix_ScaleType); |
| 125 | SkASSERT((unsigned)st <= SkImageView::kFitEnd_ScaleType); |
| 126 | |
| 127 | SkASSERT(SkImageView::kFitXY_ScaleType - 1 == SkMatrix::kFill_ScaleToFit); |
| 128 | SkASSERT(SkImageView::kFitStart_ScaleType - 1 == SkMatrix::kStart_ScaleToFit); |
| 129 | SkASSERT(SkImageView::kFitCenter_ScaleType - 1 == SkMatrix::kCenter_ScaleToFit); |
| 130 | SkASSERT(SkImageView::kFitEnd_ScaleType - 1 == SkMatrix::kEnd_ScaleToFit); |
| 131 | |
| 132 | return (SkMatrix::ScaleToFit)(st - 1); |
| 133 | } |
| 134 | |
| 135 | void SkImageView::onDraw(SkCanvas* canvas) |
| 136 | { |
| 137 | SkRect src; |
| 138 | if (!this->getDataBounds(&src)) |
| 139 | { |
| 140 | SkDEBUGCODE(canvas->drawColor(SK_ColorRED);) |
| 141 | return; // nothing to draw |
| 142 | } |
| 143 | |
| 144 | SkAutoCanvasRestore restore(canvas, true); |
| 145 | SkMatrix matrix; |
| 146 | |
| 147 | if (this->getScaleType() == kMatrix_ScaleType) |
| 148 | (void)this->getImageMatrix(&matrix); |
| 149 | else |
| 150 | { |
| 151 | SkRect dst; |
| 152 | dst.set(0, 0, this->width(), this->height()); |
| 153 | matrix.setRectToRect(src, dst, scaleTypeToScaleToFit(this->getScaleType())); |
| 154 | } |
| 155 | canvas->concat(matrix); |
| 156 | |
| 157 | SkPaint paint; |
| 158 | |
| 159 | paint.setAntiAlias(true); |
| 160 | |
| 161 | if (fDataIsAnim) |
| 162 | { |
| 163 | SkMSec now = SkTime::GetMSecs(); |
| 164 | |
| 165 | SkAnimator::DifferenceType diff = fData.fAnim->draw(canvas, &paint, now); |
| 166 | |
| 167 | SkDEBUGF(("SkImageView : now = %X[%12.3f], diff = %d\n", now, now/1000., diff)); |
| 168 | |
| 169 | if (diff == SkAnimator::kDifferent) |
| 170 | this->inval(nil); |
| 171 | else if (diff == SkAnimator::kPartiallyDifferent) |
| 172 | { |
| 173 | SkRect bounds; |
| 174 | fData.fAnim->getInvalBounds(&bounds); |
| 175 | matrix.mapRect(&bounds); // get the bounds into view coordinates |
| 176 | this->inval(&bounds); |
| 177 | } |
| 178 | } |
| 179 | else |
| 180 | canvas->drawBitmap(*fData.fBitmap, 0, 0, &paint); |
| 181 | } |
| 182 | |
| 183 | void SkImageView::onInflate(const SkDOM& dom, const SkDOMNode* node) |
| 184 | { |
| 185 | this->INHERITED::onInflate(dom, node); |
| 186 | |
| 187 | const char* src = dom.findAttr(node, "src"); |
| 188 | if (src) |
| 189 | this->setUri(src); |
| 190 | |
| 191 | int index = dom.findList(node, "scaleType", "matrix,fitXY,fitStart,fitCenter,fitEnd"); |
| 192 | if (index >= 0) |
| 193 | this->setScaleType((ScaleType)index); |
| 194 | |
| 195 | // need inflate syntax/reader for matrix |
| 196 | } |
| 197 | |
| 198 | ///////////////////////////////////////////////////////////////////////////////////// |
| 199 | |
| 200 | void SkImageView::onUriChange() |
| 201 | { |
| 202 | if (this->freeData()) |
| 203 | this->inval(nil); |
| 204 | fUriIsValid = true; // give ensureUriIsLoaded() a shot at the new uri |
| 205 | } |
| 206 | |
| 207 | bool SkImageView::freeData() |
| 208 | { |
| 209 | if (fData.fAnim) // test is valid for all union values |
| 210 | { |
| 211 | if (fDataIsAnim) |
| 212 | delete fData.fAnim; |
| 213 | else |
| 214 | delete fData.fBitmap; |
| 215 | |
| 216 | fData.fAnim = nil; // valid for all union values |
| 217 | return true; |
| 218 | } |
| 219 | return false; |
| 220 | } |
| 221 | |
| 222 | bool SkImageView::getDataBounds(SkRect* bounds) |
| 223 | { |
| 224 | SkASSERT(bounds); |
| 225 | |
| 226 | if (this->ensureUriIsLoaded()) |
| 227 | { |
| 228 | SkScalar width, height; |
| 229 | |
| 230 | if (fDataIsAnim) |
| 231 | { |
| 232 | if (SkScalarIsNaN(width = fData.fAnim->getScalar("dimensions", "x")) || |
| 233 | SkScalarIsNaN(height = fData.fAnim->getScalar("dimensions", "y"))) |
| 234 | { |
| 235 | // cons up fake bounds |
| 236 | width = this->width(); |
| 237 | height = this->height(); |
| 238 | } |
| 239 | } |
| 240 | else |
| 241 | { |
| 242 | width = SkIntToScalar(fData.fBitmap->width()); |
| 243 | height = SkIntToScalar(fData.fBitmap->height()); |
| 244 | } |
| 245 | bounds->set(0, 0, width, height); |
| 246 | return true; |
| 247 | } |
| 248 | return false; |
| 249 | } |
| 250 | |
| 251 | bool SkImageView::ensureUriIsLoaded() |
| 252 | { |
| 253 | if (fData.fAnim) // test is valid for all union values |
| 254 | { |
| 255 | SkASSERT(fUriIsValid); |
| 256 | return true; |
| 257 | } |
| 258 | if (!fUriIsValid) |
| 259 | return false; |
| 260 | |
| 261 | // try to load the url |
| 262 | if (fUri.endsWith(".xml")) // assume it is screenplay |
| 263 | { |
| 264 | SkAnimator* anim = new SkAnimator; |
| 265 | |
| 266 | if (!anim->decodeURI(fUri.c_str())) |
| 267 | { |
| 268 | delete anim; |
| 269 | fUriIsValid = false; |
| 270 | return false; |
| 271 | } |
| 272 | anim->setHostEventSink(this); |
| 273 | |
| 274 | fData.fAnim = anim; |
| 275 | fDataIsAnim = true; |
| 276 | } |
| 277 | else // assume it is an image format |
| 278 | { |
| 279 | #if 0 |
| 280 | SkBitmap* bitmap = new SkBitmap; |
| 281 | |
| 282 | if (!SkImageDecoder::DecodeURL(fUri.c_str(), bitmap)) |
| 283 | { |
| 284 | delete bitmap; |
| 285 | fUriIsValid = false; |
| 286 | return false; |
| 287 | } |
| 288 | fData.fBitmap = bitmap; |
| 289 | fDataIsAnim = false; |
| 290 | #else |
| 291 | return false; |
| 292 | #endif |
| 293 | } |
| 294 | return true; |
| 295 | } |
| 296 | |