SkiaCanvasProxy.cpp revision 6daa13c5fa7577fa1d8371deca446f6ca911f38f
1/* 2 * Copyright (C) 2015 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#include "SkiaCanvasProxy.h" 18 19#include <cutils/log.h> 20#include <SkPatchUtils.h> 21#include <SkPaint.h> 22#include <SkPath.h> 23#include <SkPixelRef.h> 24#include <SkRect.h> 25#include <SkRRect.h> 26 27#include <memory> 28 29namespace android { 30namespace uirenderer { 31 32SkiaCanvasProxy::SkiaCanvasProxy(Canvas* canvas, bool filterHwuiCalls) 33 : INHERITED(canvas->width(), canvas->height()) 34 , mCanvas(canvas) 35 , mFilterHwuiCalls(filterHwuiCalls) {} 36 37void SkiaCanvasProxy::onDrawPaint(const SkPaint& paint) { 38 mCanvas->drawPaint(paint); 39} 40 41void SkiaCanvasProxy::onDrawPoints(PointMode pointMode, size_t count, const SkPoint pts[], 42 const SkPaint& paint) { 43 if (!pts || count == 0) { 44 return; 45 } 46 47 // convert the SkPoints into floats 48 SK_COMPILE_ASSERT(sizeof(SkPoint) == sizeof(float)*2, SkPoint_is_no_longer_2_floats); 49 const size_t floatCount = count << 1; 50 const float* floatArray = &pts[0].fX; 51 52 switch (pointMode) { 53 case kPoints_PointMode: { 54 mCanvas->drawPoints(floatArray, floatCount, paint); 55 break; 56 } 57 case kLines_PointMode: { 58 mCanvas->drawLines(floatArray, floatCount, paint); 59 break; 60 } 61 case kPolygon_PointMode: { 62 SkPaint strokedPaint(paint); 63 strokedPaint.setStyle(SkPaint::kStroke_Style); 64 65 SkPath path; 66 for (size_t i = 0; i < count - 1; i++) { 67 path.moveTo(pts[i]); 68 path.lineTo(pts[i+1]); 69 this->drawPath(path, strokedPaint); 70 path.rewind(); 71 } 72 break; 73 } 74 default: 75 LOG_ALWAYS_FATAL("Unknown point type"); 76 } 77} 78 79void SkiaCanvasProxy::onDrawOval(const SkRect& rect, const SkPaint& paint) { 80 mCanvas->drawOval(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, paint); 81} 82 83void SkiaCanvasProxy::onDrawRect(const SkRect& rect, const SkPaint& paint) { 84 mCanvas->drawRect(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, paint); 85} 86 87void SkiaCanvasProxy::onDrawRRect(const SkRRect& roundRect, const SkPaint& paint) { 88 if (!roundRect.isComplex()) { 89 const SkRect& rect = roundRect.rect(); 90 SkVector radii = roundRect.getSimpleRadii(); 91 mCanvas->drawRoundRect(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, 92 radii.fX, radii.fY, paint); 93 } else { 94 SkPath path; 95 path.addRRect(roundRect); 96 mCanvas->drawPath(path, paint); 97 } 98} 99 100void SkiaCanvasProxy::onDrawPath(const SkPath& path, const SkPaint& paint) { 101 mCanvas->drawPath(path, paint); 102} 103 104void SkiaCanvasProxy::onDrawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top, 105 const SkPaint* paint) { 106 SkPixelRef* pxRef = bitmap.pixelRef(); 107 108 // HWUI doesn't support extractSubset(), so convert any subsetted bitmap into 109 // a drawBitmapRect(); pass through an un-subsetted bitmap. 110 if (pxRef && bitmap.dimensions() != pxRef->info().dimensions()) { 111 SkBitmap fullBitmap; 112 fullBitmap.setInfo(pxRef->info()); 113 fullBitmap.setPixelRef(pxRef, 0, 0); 114 SkIPoint origin = bitmap.pixelRefOrigin(); 115 mCanvas->drawBitmap(fullBitmap, origin.fX, origin.fY, 116 origin.fX + bitmap.dimensions().width(), 117 origin.fY + bitmap.dimensions().height(), 118 left, top, 119 left + bitmap.dimensions().width(), 120 top + bitmap.dimensions().height(), 121 paint); 122 } else { 123 mCanvas->drawBitmap(bitmap, left, top, paint); 124 } 125} 126 127void SkiaCanvasProxy::onDrawBitmapRect(const SkBitmap& bitmap, const SkRect* srcPtr, 128 const SkRect& dst, const SkPaint* paint, DrawBitmapRectFlags) { 129 SkRect src = (srcPtr) ? *srcPtr : SkRect::MakeWH(bitmap.width(), bitmap.height()); 130 // TODO: if bitmap is a subset, do we need to add pixelRefOrigin to src? 131 mCanvas->drawBitmap(bitmap, src.fLeft, src.fTop, src.fRight, src.fBottom, 132 dst.fLeft, dst.fTop, dst.fRight, dst.fBottom, paint); 133} 134 135void SkiaCanvasProxy::onDrawBitmapNine(const SkBitmap& bitmap, const SkIRect& center, 136 const SkRect& dst, const SkPaint*) { 137 //TODO make nine-patch drawing a method on Canvas.h 138 SkDEBUGFAIL("SkiaCanvasProxy::onDrawBitmapNine is not yet supported"); 139} 140 141void SkiaCanvasProxy::onDrawSprite(const SkBitmap& bitmap, int left, int top, 142 const SkPaint* paint) { 143 // TODO: if bitmap is a subset, do we need to add pixelRefOrigin to src? 144 mCanvas->save(SkCanvas::kMatrixClip_SaveFlag); 145 mCanvas->setMatrix(SkMatrix::I()); 146 mCanvas->drawBitmap(bitmap, left, top, paint); 147 mCanvas->restore(); 148} 149 150void SkiaCanvasProxy::onDrawVertices(VertexMode mode, int vertexCount, const SkPoint vertices[], 151 const SkPoint texs[], const SkColor colors[], SkXfermode*, const uint16_t indices[], 152 int indexCount, const SkPaint& paint) { 153 if (mFilterHwuiCalls) { 154 return; 155 } 156 // convert the SkPoints into floats 157 SK_COMPILE_ASSERT(sizeof(SkPoint) == sizeof(float)*2, SkPoint_is_no_longer_2_floats); 158 const int floatCount = vertexCount << 1; 159 const float* vArray = &vertices[0].fX; 160 const float* tArray = (texs) ? &texs[0].fX : NULL; 161 const int* cArray = (colors) ? (int*)colors : NULL; 162 mCanvas->drawVertices(mode, floatCount, vArray, tArray, cArray, indices, indexCount, paint); 163} 164 165SkSurface* SkiaCanvasProxy::onNewSurface(const SkImageInfo&, const SkSurfaceProps&) { 166 SkDEBUGFAIL("SkiaCanvasProxy::onNewSurface is not supported"); 167 return NULL; 168} 169 170void SkiaCanvasProxy::willSave() { 171 mCanvas->save(SkCanvas::kMatrixClip_SaveFlag); 172} 173 174SkCanvas::SaveLayerStrategy SkiaCanvasProxy::willSaveLayer(const SkRect* rectPtr, 175 const SkPaint* paint, SaveFlags flags) { 176 SkRect rect; 177 if (rectPtr) { 178 rect = *rectPtr; 179 } else if(!mCanvas->getClipBounds(&rect)) { 180 rect = SkRect::MakeEmpty(); 181 } 182 mCanvas->saveLayer(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, paint, flags); 183 return SkCanvas::kNoLayer_SaveLayerStrategy; 184} 185 186void SkiaCanvasProxy::willRestore() { 187 mCanvas->restore(); 188} 189 190void SkiaCanvasProxy::didConcat(const SkMatrix& matrix) { 191 mCanvas->concat(matrix); 192} 193 194void SkiaCanvasProxy::didSetMatrix(const SkMatrix& matrix) { 195 mCanvas->setMatrix(matrix); 196} 197 198void SkiaCanvasProxy::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, 199 const SkPaint& paint) { 200 SkPath path; 201 path.addRRect(outer); 202 path.addRRect(inner); 203 path.setFillType(SkPath::kEvenOdd_FillType); 204 this->drawPath(path, paint); 205} 206 207/** 208 * Utility class that converts the incoming text & paint from the given encoding 209 * into glyphIDs. 210 */ 211class GlyphIDConverter { 212public: 213 GlyphIDConverter(const void* text, size_t byteLength, const SkPaint& origPaint) { 214 paint = origPaint; 215 if (paint.getTextEncoding() == SkPaint::kGlyphID_TextEncoding) { 216 glyphIDs = (uint16_t*)text; 217 count = byteLength >> 1; 218 } else { 219 // ensure space for one glyph per ID given UTF8 encoding. 220 storage.reset(new uint16_t[byteLength]); 221 glyphIDs = storage.get(); 222 count = paint.textToGlyphs(text, byteLength, storage.get()); 223 paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); 224 } 225 } 226 227 SkPaint paint; 228 uint16_t* glyphIDs; 229 int count; 230private: 231 std::unique_ptr<uint16_t[]> storage; 232}; 233 234void SkiaCanvasProxy::onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y, 235 const SkPaint& origPaint) { 236 // convert to glyphIDs if necessary 237 GlyphIDConverter glyphs(text, byteLength, origPaint); 238 239 // compute the glyph positions 240 std::unique_ptr<SkPoint[]> pointStorage(new SkPoint[glyphs.count]); 241 std::unique_ptr<SkScalar[]> glyphWidths(new SkScalar[glyphs.count]); 242 glyphs.paint.getTextWidths(glyphs.glyphIDs, glyphs.count << 1, glyphWidths.get()); 243 244 // compute conservative bounds 245 // NOTE: We could call the faster paint.getFontBounds for a less accurate, 246 // but even more conservative bounds if this is too slow. 247 SkRect bounds; 248 glyphs.paint.measureText(glyphs.glyphIDs, glyphs.count << 1, &bounds); 249 250 // adjust for non-left alignment 251 if (glyphs.paint.getTextAlign() != SkPaint::kLeft_Align) { 252 SkScalar stop = 0; 253 for (int i = 0; i < glyphs.count; i++) { 254 stop += glyphWidths[i]; 255 } 256 if (glyphs.paint.getTextAlign() == SkPaint::kCenter_Align) { 257 stop = SkScalarHalf(stop); 258 } 259 if (glyphs.paint.isVerticalText()) { 260 y -= stop; 261 } else { 262 x -= stop; 263 } 264 } 265 266 // setup the first glyph position and adjust bounds if needed 267 int xBaseline = 0; 268 int yBaseline = 0; 269 if (mCanvas->drawTextAbsolutePos()) { 270 bounds.offset(x,y); 271 xBaseline = x; 272 yBaseline = y; 273 } 274 pointStorage[0].set(xBaseline, yBaseline); 275 276 // setup the remaining glyph positions 277 if (glyphs.paint.isVerticalText()) { 278 for (int i = 1; i < glyphs.count; i++) { 279 pointStorage[i].set(xBaseline, glyphWidths[i-1] + pointStorage[i-1].fY); 280 } 281 } else { 282 for (int i = 1; i < glyphs.count; i++) { 283 pointStorage[i].set(glyphWidths[i-1] + pointStorage[i-1].fX, yBaseline); 284 } 285 } 286 287 SK_COMPILE_ASSERT(sizeof(SkPoint) == sizeof(float)*2, SkPoint_is_no_longer_2_floats); 288 mCanvas->drawText(glyphs.glyphIDs, &pointStorage[0].fX, glyphs.count, glyphs.paint, 289 x, y, bounds.fLeft, bounds.fTop, bounds.fRight, bounds.fBottom, 0); 290} 291 292void SkiaCanvasProxy::onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[], 293 const SkPaint& origPaint) { 294 // convert to glyphIDs if necessary 295 GlyphIDConverter glyphs(text, byteLength, origPaint); 296 297 // convert to relative positions if necessary 298 int x, y; 299 const SkPoint* posArray; 300 std::unique_ptr<SkPoint[]> pointStorage; 301 if (mCanvas->drawTextAbsolutePos()) { 302 x = 0; 303 y = 0; 304 posArray = pos; 305 } else { 306 x = pos[0].fX; 307 y = pos[0].fY; 308 pointStorage.reset(new SkPoint[glyphs.count]); 309 for (int i = 0; i < glyphs.count; i++) { 310 pointStorage[i].fX = pos[i].fX - x; 311 pointStorage[i].fY = pos[i].fY - y; 312 } 313 posArray = pointStorage.get(); 314 } 315 316 // compute conservative bounds 317 // NOTE: We could call the faster paint.getFontBounds for a less accurate, 318 // but even more conservative bounds if this is too slow. 319 SkRect bounds; 320 glyphs.paint.measureText(glyphs.glyphIDs, glyphs.count << 1, &bounds); 321 bounds.offset(x, y); 322 323 SK_COMPILE_ASSERT(sizeof(SkPoint) == sizeof(float)*2, SkPoint_is_no_longer_2_floats); 324 mCanvas->drawText(glyphs.glyphIDs, &posArray[0].fX, glyphs.count, glyphs.paint, x, y, 325 bounds.fLeft, bounds.fTop, bounds.fRight, bounds.fBottom, 0); 326} 327 328void SkiaCanvasProxy::onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[], 329 SkScalar constY, const SkPaint& paint) { 330 const size_t pointCount = byteLength >> 1; 331 std::unique_ptr<SkPoint[]> pts(new SkPoint[pointCount]); 332 for (size_t i = 0; i < pointCount; i++) { 333 pts[i].set(xpos[i], constY); 334 } 335 this->onDrawPosText(text, byteLength, pts.get(), paint); 336} 337 338void SkiaCanvasProxy::onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path, 339 const SkMatrix* matrix, const SkPaint& origPaint) { 340 // convert to glyphIDs if necessary 341 GlyphIDConverter glyphs(text, byteLength, origPaint); 342 mCanvas->drawTextOnPath(glyphs.glyphIDs, glyphs.count, path, 0, 0, glyphs.paint); 343} 344 345void SkiaCanvasProxy::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, 346 const SkPaint& paint) { 347 SkDEBUGFAIL("SkiaCanvasProxy::onDrawTextBlob is not supported"); 348} 349 350void SkiaCanvasProxy::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4], 351 const SkPoint texCoords[4], SkXfermode* xmode, const SkPaint& paint) { 352 if (mFilterHwuiCalls) { 353 return; 354 } 355 SkPatchUtils::VertexData data; 356 357 SkMatrix matrix; 358 mCanvas->getMatrix(&matrix); 359 SkISize lod = SkPatchUtils::GetLevelOfDetail(cubics, &matrix); 360 361 // It automatically adjusts lodX and lodY in case it exceeds the number of indices. 362 // If it fails to generate the vertices, then we do not draw. 363 if (SkPatchUtils::getVertexData(&data, cubics, colors, texCoords, lod.width(), lod.height())) { 364 this->drawVertices(SkCanvas::kTriangles_VertexMode, data.fVertexCount, data.fPoints, 365 data.fTexCoords, data.fColors, xmode, data.fIndices, data.fIndexCount, 366 paint); 367 } 368} 369 370void SkiaCanvasProxy::onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle) { 371 mCanvas->clipRect(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, op); 372} 373 374void SkiaCanvasProxy::onClipRRect(const SkRRect& roundRect, SkRegion::Op op, ClipEdgeStyle) { 375 SkPath path; 376 path.addRRect(roundRect); 377 mCanvas->clipPath(&path, op); 378} 379 380void SkiaCanvasProxy::onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle) { 381 mCanvas->clipPath(&path, op); 382} 383 384void SkiaCanvasProxy::onClipRegion(const SkRegion& region, SkRegion::Op op) { 385 mCanvas->clipRegion(®ion, op); 386} 387 388}; // namespace uirenderer 389}; // namespace android 390