1 2 /* 3 * Copyright 2012 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 #include "SkBBoxRecord.h" 10 11 void SkBBoxRecord::drawOval(const SkRect& rect, const SkPaint& paint) { 12 if (this->transformBounds(rect, &paint)) { 13 INHERITED::drawOval(rect, paint); 14 } 15 } 16 17 void SkBBoxRecord::drawRRect(const SkRRect& rrect, const SkPaint& paint) { 18 if (this->transformBounds(rrect.rect(), &paint)) { 19 INHERITED::drawRRect(rrect, paint); 20 } 21 } 22 23 void SkBBoxRecord::drawRect(const SkRect& rect, const SkPaint& paint) { 24 if (this->transformBounds(rect, &paint)) { 25 INHERITED::drawRect(rect, paint); 26 } 27 } 28 29 void SkBBoxRecord::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, 30 const SkPaint& paint) { 31 if (this->transformBounds(outer.rect(), &paint)) { 32 this->INHERITED::onDrawDRRect(outer, inner, paint); 33 } 34 } 35 36 void SkBBoxRecord::drawPath(const SkPath& path, const SkPaint& paint) { 37 if (path.isInverseFillType()) { 38 // If path is inverse filled, use the current clip bounds as the 39 // path's device-space bounding box. 40 SkIRect clipBounds; 41 if (this->getClipDeviceBounds(&clipBounds)) { 42 this->handleBBox(SkRect::Make(clipBounds)); 43 INHERITED::drawPath(path, paint); 44 } 45 } else if (this->transformBounds(path.getBounds(), &paint)) { 46 INHERITED::drawPath(path, paint); 47 } 48 } 49 50 void SkBBoxRecord::drawPoints(PointMode mode, size_t count, const SkPoint pts[], 51 const SkPaint& paint) { 52 SkRect bbox; 53 bbox.set(pts, SkToInt(count)); 54 // Small min width value, just to ensure hairline point bounding boxes aren't empty. 55 // Even though we know hairline primitives are drawn one pixel wide, we do not use a 56 // minimum of 1 because the playback scale factor is unknown at record time. Later 57 // outsets will take care of adding additional padding for antialiasing and rounding out 58 // to integer device coordinates, guaranteeing that the rasterized pixels will be included 59 // in the computed bounds. 60 // Note: The device coordinate outset in SkBBoxHierarchyRecord::handleBBox is currently 61 // done in the recording coordinate space, which is wrong. 62 // http://code.google.com/p/skia/issues/detail?id=1021 63 static const SkScalar kMinWidth = 0.01f; 64 SkScalar halfStrokeWidth = SkMaxScalar(paint.getStrokeWidth(), kMinWidth) / 2; 65 bbox.outset(halfStrokeWidth, halfStrokeWidth); 66 if (this->transformBounds(bbox, &paint)) { 67 INHERITED::drawPoints(mode, count, pts, paint); 68 } 69 } 70 71 void SkBBoxRecord::drawPaint(const SkPaint& paint) { 72 SkRect bbox; 73 if (this->getClipBounds(&bbox)) { 74 if (this->transformBounds(bbox, &paint)) { 75 INHERITED::drawPaint(paint); 76 } 77 } 78 } 79 80 void SkBBoxRecord::clear(SkColor color) { 81 SkISize size = this->getDeviceSize(); 82 SkRect bbox = {0, 0, SkIntToScalar(size.width()), SkIntToScalar(size.height())}; 83 this->handleBBox(bbox); 84 INHERITED::clear(color); 85 } 86 87 void SkBBoxRecord::onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y, 88 const SkPaint& paint) { 89 SkRect bbox; 90 paint.measureText(text, byteLength, &bbox); 91 SkPaint::FontMetrics metrics; 92 paint.getFontMetrics(&metrics); 93 94 // Vertical and aligned text need to be offset 95 if (paint.isVerticalText()) { 96 SkScalar h = bbox.fBottom - bbox.fTop; 97 if (paint.getTextAlign() == SkPaint::kCenter_Align) { 98 bbox.fTop -= h / 2; 99 bbox.fBottom -= h / 2; 100 } 101 // Pad top and bottom with max extents from FontMetrics 102 bbox.fBottom += metrics.fBottom; 103 bbox.fTop += metrics.fTop; 104 } else { 105 SkScalar w = bbox.fRight - bbox.fLeft; 106 if (paint.getTextAlign() == SkPaint::kCenter_Align) { 107 bbox.fLeft -= w / 2; 108 bbox.fRight -= w / 2; 109 } else if (paint.getTextAlign() == SkPaint::kRight_Align) { 110 bbox.fLeft -= w; 111 bbox.fRight -= w; 112 } 113 // Set vertical bounds to max extents from font metrics 114 bbox.fTop = metrics.fTop; 115 bbox.fBottom = metrics.fBottom; 116 } 117 118 // Pad horizontal bounds on each side by half of max vertical extents (this is sort of 119 // arbitrary, but seems to produce reasonable results, if there were a way of getting max 120 // glyph X-extents to pad by, that may be better here, but FontMetrics fXMin and fXMax seem 121 // incorrect on most platforms (too small in Linux, never even set in Windows). 122 SkScalar pad = (metrics.fBottom - metrics.fTop) / 2; 123 bbox.fLeft -= pad; 124 bbox.fRight += pad; 125 126 bbox.fLeft += x; 127 bbox.fRight += x; 128 bbox.fTop += y; 129 bbox.fBottom += y; 130 if (this->transformBounds(bbox, &paint)) { 131 INHERITED::onDrawText(text, byteLength, x, y, paint); 132 } 133 } 134 135 void SkBBoxRecord::drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top, 136 const SkPaint* paint) { 137 SkRect bbox = {left, top, left + bitmap.width(), top + bitmap.height()}; 138 if (this->transformBounds(bbox, paint)) { 139 INHERITED::drawBitmap(bitmap, left, top, paint); 140 } 141 } 142 143 void SkBBoxRecord::drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src, 144 const SkRect& dst, const SkPaint* paint, 145 DrawBitmapRectFlags flags) { 146 if (this->transformBounds(dst, paint)) { 147 INHERITED::drawBitmapRectToRect(bitmap, src, dst, paint, flags); 148 } 149 } 150 151 void SkBBoxRecord::drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& mat, 152 const SkPaint* paint) { 153 SkMatrix m = mat; 154 SkRect bbox = {0, 0, SkIntToScalar(bitmap.width()), SkIntToScalar(bitmap.height())}; 155 m.mapRect(&bbox); 156 if (this->transformBounds(bbox, paint)) { 157 INHERITED::drawBitmapMatrix(bitmap, mat, paint); 158 } 159 } 160 161 void SkBBoxRecord::drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center, 162 const SkRect& dst, const SkPaint* paint) { 163 if (this->transformBounds(dst, paint)) { 164 INHERITED::drawBitmapNine(bitmap, center, dst, paint); 165 } 166 } 167 168 // Hack to work-around https://code.google.com/p/chromium/issues/detail?id=373785 169 // This logic assums that 'pad' is enough to add to the left and right to account for 170 // big glyphs. For the font in question (a logo font) the glyphs is much wider than just 171 // the pointsize (approx 3x wider). 172 // As a temp work-around, we scale-up pad. 173 // A more correct fix might be to add fontmetrics.fMaxX, but we don't have that value in hand 174 // at the moment, and (possibly) the value in the font may not be accurate (but who knows). 175 // 176 static SkScalar hack_373785_amend_pad(SkScalar pad) { 177 return pad * 4; 178 } 179 180 void SkBBoxRecord::onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[], 181 const SkPaint& paint) { 182 SkRect bbox; 183 bbox.set(pos, paint.countText(text, byteLength)); 184 SkPaint::FontMetrics metrics; 185 paint.getFontMetrics(&metrics); 186 bbox.fTop += metrics.fTop; 187 bbox.fBottom += metrics.fBottom; 188 189 // pad on left and right by half of max vertical glyph extents 190 SkScalar pad = (metrics.fTop - metrics.fBottom) / 2; 191 pad = hack_373785_amend_pad(pad); 192 bbox.fLeft += pad; 193 bbox.fRight -= pad; 194 195 if (this->transformBounds(bbox, &paint)) { 196 INHERITED::onDrawPosText(text, byteLength, pos, paint); 197 } 198 } 199 200 void SkBBoxRecord::onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[], 201 SkScalar constY, const SkPaint& paint) { 202 size_t numChars = paint.countText(text, byteLength); 203 if (numChars == 0) { 204 return; 205 } 206 207 const SkFlatData* flatPaintData = this->getFlatPaintData(paint); 208 WriteTopBot(paint, *flatPaintData); 209 210 SkScalar top = flatPaintData->topBot()[0]; 211 SkScalar bottom = flatPaintData->topBot()[1]; 212 SkScalar pad = top - bottom; 213 214 SkRect bbox; 215 bbox.fLeft = SK_ScalarMax; 216 bbox.fRight = SK_ScalarMin; 217 218 for (size_t i = 0; i < numChars; ++i) { 219 if (xpos[i] < bbox.fLeft) { 220 bbox.fLeft = xpos[i]; 221 } 222 if (xpos[i] > bbox.fRight) { 223 bbox.fRight = xpos[i]; 224 } 225 } 226 227 // pad horizontally by max glyph height 228 pad = hack_373785_amend_pad(pad); 229 bbox.fLeft += pad; 230 bbox.fRight -= pad; 231 232 bbox.fTop = top + constY; 233 bbox.fBottom = bottom + constY; 234 235 if (!this->transformBounds(bbox, &paint)) { 236 return; 237 } 238 // This is the equivalent of calling: 239 // INHERITED::drawPosTextH(text, byteLength, xpos, constY, paint); 240 // but we filled our flat paint beforehand so that we could get font metrics. 241 drawPosTextHImpl(text, byteLength, xpos, constY, paint, flatPaintData); 242 } 243 244 void SkBBoxRecord::drawSprite(const SkBitmap& bitmap, int left, int top, 245 const SkPaint* paint) { 246 SkRect bbox; 247 bbox.set(SkIRect::MakeXYWH(left, top, bitmap.width(), bitmap.height())); 248 this->handleBBox(bbox); // directly call handleBBox, matrix is ignored 249 INHERITED::drawSprite(bitmap, left, top, paint); 250 } 251 252 void SkBBoxRecord::onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path, 253 const SkMatrix* matrix, const SkPaint& paint) { 254 SkRect bbox = path.getBounds(); 255 SkPaint::FontMetrics metrics; 256 paint.getFontMetrics(&metrics); 257 258 // pad out all sides by the max glyph height above baseline 259 SkScalar pad = metrics.fTop; 260 bbox.fLeft += pad; 261 bbox.fRight -= pad; 262 bbox.fTop += pad; 263 bbox.fBottom -= pad; 264 265 if (this->transformBounds(bbox, &paint)) { 266 INHERITED::onDrawTextOnPath(text, byteLength, path, matrix, paint); 267 } 268 } 269 270 void SkBBoxRecord::drawVertices(VertexMode mode, int vertexCount, 271 const SkPoint vertices[], const SkPoint texs[], 272 const SkColor colors[], SkXfermode* xfer, 273 const uint16_t indices[], int indexCount, 274 const SkPaint& paint) { 275 SkRect bbox; 276 bbox.set(vertices, vertexCount); 277 if (this->transformBounds(bbox, &paint)) { 278 INHERITED::drawVertices(mode, vertexCount, vertices, texs, 279 colors, xfer, indices, indexCount, paint); 280 } 281 } 282 283 void SkBBoxRecord::onDrawPicture(const SkPicture* picture) { 284 if (picture->width() > 0 && picture->height() > 0 && 285 this->transformBounds(SkRect::MakeWH(picture->width(), picture->height()), NULL)) { 286 this->INHERITED::onDrawPicture(picture); 287 } 288 } 289 290 bool SkBBoxRecord::transformBounds(const SkRect& bounds, const SkPaint* paint) { 291 SkRect outBounds = bounds; 292 outBounds.sort(); 293 294 if (paint) { 295 // account for stroking, path effects, shadows, etc 296 if (paint->canComputeFastBounds()) { 297 SkRect temp; 298 outBounds = paint->computeFastBounds(outBounds, &temp); 299 } else { 300 // set bounds to current clip 301 if (!this->getClipBounds(&outBounds)) { 302 // current clip is empty 303 return false; 304 } 305 } 306 } 307 308 if (!outBounds.isEmpty() && !this->quickReject(outBounds)) { 309 this->getTotalMatrix().mapRect(&outBounds); 310 this->handleBBox(outBounds); 311 return true; 312 } 313 314 return false; 315 } 316