| /* | |
| * Copyright 2011 Google Inc. | |
| * | |
| * Use of this source code is governed by a BSD-style license that can be | |
| * found in the LICENSE file. | |
| */ | |
| #include "SkDevice.h" | |
| #include "SkColorFilter.h" | |
| #include "SkDraw.h" | |
| #include "SkGlyphRun.h" | |
| #include "SkImageFilter.h" | |
| #include "SkImageFilterCache.h" | |
| #include "SkImagePriv.h" | |
| #include "SkImage_Base.h" | |
| #include "SkLatticeIter.h" | |
| #include "SkLocalMatrixShader.h" | |
| #include "SkMakeUnique.h" | |
| #include "SkMatrixPriv.h" | |
| #include "SkPatchUtils.h" | |
| #include "SkPathMeasure.h" | |
| #include "SkPathPriv.h" | |
| #include "SkRSXform.h" | |
| #include "SkRasterClip.h" | |
| #include "SkShader.h" | |
| #include "SkSpecialImage.h" | |
| #include "SkTLazy.h" | |
| #include "SkTextBlobPriv.h" | |
| #include "SkTextToPathIter.h" | |
| #include "SkTo.h" | |
| #include "SkUtils.h" | |
| #include "SkVertices.h" | |
| SkBaseDevice::SkBaseDevice(const SkImageInfo& info, const SkSurfaceProps& surfaceProps) | |
| : fInfo(info) | |
| , fSurfaceProps(surfaceProps) | |
| { | |
| fOrigin = {0, 0}; | |
| fCTM.reset(); | |
| } | |
| void SkBaseDevice::setOrigin(const SkMatrix& globalCTM, int x, int y) { | |
| fOrigin.set(x, y); | |
| fCTM = globalCTM; | |
| fCTM.postTranslate(SkIntToScalar(-x), SkIntToScalar(-y)); | |
| } | |
| void SkBaseDevice::setGlobalCTM(const SkMatrix& ctm) { | |
| fCTM = ctm; | |
| if (fOrigin.fX | fOrigin.fY) { | |
| fCTM.postTranslate(-SkIntToScalar(fOrigin.fX), -SkIntToScalar(fOrigin.fY)); | |
| } | |
| } | |
| bool SkBaseDevice::clipIsWideOpen() const { | |
| if (kRect_ClipType == this->onGetClipType()) { | |
| SkRegion rgn; | |
| this->onAsRgnClip(&rgn); | |
| SkASSERT(rgn.isRect()); | |
| return rgn.getBounds() == SkIRect::MakeWH(this->width(), this->height()); | |
| } else { | |
| return false; | |
| } | |
| } | |
| SkPixelGeometry SkBaseDevice::CreateInfo::AdjustGeometry(const SkImageInfo& info, | |
| TileUsage tileUsage, | |
| SkPixelGeometry geo, | |
| bool preserveLCDText) { | |
| switch (tileUsage) { | |
| case kPossible_TileUsage: | |
| // (we think) for compatibility with old clients, we assume this layer can support LCD | |
| // even though they may not have marked it as opaque... seems like we should update | |
| // our callers (reed/robertphilips). | |
| break; | |
| case kNever_TileUsage: | |
| if (!preserveLCDText) { | |
| geo = kUnknown_SkPixelGeometry; | |
| } | |
| break; | |
| } | |
| return geo; | |
| } | |
| static inline bool is_int(float x) { | |
| return x == (float) sk_float_round2int(x); | |
| } | |
| void SkBaseDevice::drawRegion(const SkRegion& region, const SkPaint& paint) { | |
| const SkMatrix& ctm = this->ctm(); | |
| bool isNonTranslate = ctm.getType() & ~(SkMatrix::kTranslate_Mask); | |
| bool complexPaint = paint.getStyle() != SkPaint::kFill_Style || paint.getMaskFilter() || | |
| paint.getPathEffect(); | |
| bool antiAlias = paint.isAntiAlias() && (!is_int(ctm.getTranslateX()) || | |
| !is_int(ctm.getTranslateY())); | |
| if (isNonTranslate || complexPaint || antiAlias) { | |
| SkPath path; | |
| region.getBoundaryPath(&path); | |
| path.setIsVolatile(true); | |
| return this->drawPath(path, paint, true); | |
| } | |
| SkRegion::Iterator it(region); | |
| while (!it.done()) { | |
| this->drawRect(SkRect::Make(it.rect()), paint); | |
| it.next(); | |
| } | |
| } | |
| void SkBaseDevice::drawArc(const SkRect& oval, SkScalar startAngle, | |
| SkScalar sweepAngle, bool useCenter, const SkPaint& paint) { | |
| SkPath path; | |
| bool isFillNoPathEffect = SkPaint::kFill_Style == paint.getStyle() && !paint.getPathEffect(); | |
| SkPathPriv::CreateDrawArcPath(&path, oval, startAngle, sweepAngle, useCenter, | |
| isFillNoPathEffect); | |
| this->drawPath(path, paint); | |
| } | |
| void SkBaseDevice::drawDRRect(const SkRRect& outer, | |
| const SkRRect& inner, const SkPaint& paint) { | |
| SkPath path; | |
| path.addRRect(outer); | |
| path.addRRect(inner); | |
| path.setFillType(SkPath::kEvenOdd_FillType); | |
| path.setIsVolatile(true); | |
| this->drawPath(path, paint, true); | |
| } | |
| void SkBaseDevice::drawPatch(const SkPoint cubics[12], const SkColor colors[4], | |
| const SkPoint texCoords[4], SkBlendMode bmode, const SkPaint& paint) { | |
| SkISize lod = SkPatchUtils::GetLevelOfDetail(cubics, &this->ctm()); | |
| auto vertices = SkPatchUtils::MakeVertices(cubics, colors, texCoords, lod.width(), lod.height(), | |
| this->imageInfo().colorSpace()); | |
| if (vertices) { | |
| this->drawVertices(vertices.get(), nullptr, 0, bmode, paint); | |
| } | |
| } | |
| void SkBaseDevice::drawImage(const SkImage* image, SkScalar x, SkScalar y, | |
| const SkPaint& paint) { | |
| SkBitmap bm; | |
| if (as_IB(image)->getROPixels(&bm, this->imageInfo().colorSpace())) { | |
| this->drawBitmap(bm, x, y, paint); | |
| } | |
| } | |
| void SkBaseDevice::drawImageRect(const SkImage* image, const SkRect* src, | |
| const SkRect& dst, const SkPaint& paint, | |
| SkCanvas::SrcRectConstraint constraint) { | |
| SkBitmap bm; | |
| if (as_IB(image)->getROPixels(&bm, this->imageInfo().colorSpace())) { | |
| this->drawBitmapRect(bm, src, dst, paint, constraint); | |
| } | |
| } | |
| void SkBaseDevice::drawImageNine(const SkImage* image, const SkIRect& center, | |
| const SkRect& dst, const SkPaint& paint) { | |
| SkLatticeIter iter(image->width(), image->height(), center, dst); | |
| SkRect srcR, dstR; | |
| while (iter.next(&srcR, &dstR)) { | |
| this->drawImageRect(image, &srcR, dstR, paint, SkCanvas::kStrict_SrcRectConstraint); | |
| } | |
| } | |
| void SkBaseDevice::drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center, | |
| const SkRect& dst, const SkPaint& paint) { | |
| SkLatticeIter iter(bitmap.width(), bitmap.height(), center, dst); | |
| SkRect srcR, dstR; | |
| while (iter.next(&srcR, &dstR)) { | |
| this->drawBitmapRect(bitmap, &srcR, dstR, paint, SkCanvas::kStrict_SrcRectConstraint); | |
| } | |
| } | |
| void SkBaseDevice::drawImageLattice(const SkImage* image, | |
| const SkCanvas::Lattice& lattice, const SkRect& dst, | |
| const SkPaint& paint) { | |
| SkLatticeIter iter(lattice, dst); | |
| SkRect srcR, dstR; | |
| SkColor c; | |
| bool isFixedColor = false; | |
| const SkImageInfo info = SkImageInfo::Make(1, 1, kBGRA_8888_SkColorType, kUnpremul_SkAlphaType); | |
| while (iter.next(&srcR, &dstR, &isFixedColor, &c)) { | |
| if (isFixedColor || (srcR.width() <= 1.0f && srcR.height() <= 1.0f && | |
| image->readPixels(info, &c, 4, srcR.fLeft, srcR.fTop))) { | |
| // Fast draw with drawRect, if this is a patch containing a single color | |
| // or if this is a patch containing a single pixel. | |
| if (0 != c || !paint.isSrcOver()) { | |
| SkPaint paintCopy(paint); | |
| int alpha = SkAlphaMul(SkColorGetA(c), SkAlpha255To256(paint.getAlpha())); | |
| paintCopy.setColor(SkColorSetA(c, alpha)); | |
| this->drawRect(dstR, paintCopy); | |
| } | |
| } else { | |
| this->drawImageRect(image, &srcR, dstR, paint, SkCanvas::kStrict_SrcRectConstraint); | |
| } | |
| } | |
| } | |
| void SkBaseDevice::drawGlyphRunList(const SkGlyphRunList& glyphRunList) { | |
| glyphRunList.temporaryShuntToDrawPosText(this, SkPoint::Make(0, 0)); | |
| } | |
| void SkBaseDevice::drawBitmapLattice(const SkBitmap& bitmap, | |
| const SkCanvas::Lattice& lattice, const SkRect& dst, | |
| const SkPaint& paint) { | |
| SkLatticeIter iter(lattice, dst); | |
| SkRect srcR, dstR; | |
| while (iter.next(&srcR, &dstR)) { | |
| this->drawBitmapRect(bitmap, &srcR, dstR, paint, SkCanvas::kStrict_SrcRectConstraint); | |
| } | |
| } | |
| static SkPoint* quad_to_tris(SkPoint tris[6], const SkPoint quad[4]) { | |
| tris[0] = quad[0]; | |
| tris[1] = quad[1]; | |
| tris[2] = quad[2]; | |
| tris[3] = quad[0]; | |
| tris[4] = quad[2]; | |
| tris[5] = quad[3]; | |
| return tris + 6; | |
| } | |
| void SkBaseDevice::drawAtlas(const SkImage* atlas, const SkRSXform xform[], | |
| const SkRect tex[], const SkColor colors[], int quadCount, | |
| SkBlendMode mode, const SkPaint& paint) { | |
| const int triCount = quadCount << 1; | |
| const int vertexCount = triCount * 3; | |
| uint32_t flags = SkVertices::kHasTexCoords_BuilderFlag; | |
| if (colors) { | |
| flags |= SkVertices::kHasColors_BuilderFlag; | |
| } | |
| SkVertices::Builder builder(SkVertices::kTriangles_VertexMode, vertexCount, 0, flags); | |
| SkPoint* vPos = builder.positions(); | |
| SkPoint* vTex = builder.texCoords(); | |
| SkColor* vCol = builder.colors(); | |
| for (int i = 0; i < quadCount; ++i) { | |
| SkPoint tmp[4]; | |
| xform[i].toQuad(tex[i].width(), tex[i].height(), tmp); | |
| vPos = quad_to_tris(vPos, tmp); | |
| tex[i].toQuad(tmp); | |
| vTex = quad_to_tris(vTex, tmp); | |
| if (colors) { | |
| sk_memset32(vCol, colors[i], 6); | |
| vCol += 6; | |
| } | |
| } | |
| SkPaint p(paint); | |
| p.setShader(atlas->makeShader()); | |
| this->drawVertices(builder.detach().get(), nullptr, 0, mode, p); | |
| } | |
| /////////////////////////////////////////////////////////////////////////////////////////////////// | |
| void SkBaseDevice::drawSpecial(SkSpecialImage*, int x, int y, const SkPaint&, | |
| SkImage*, const SkMatrix&) {} | |
| sk_sp<SkSpecialImage> SkBaseDevice::makeSpecial(const SkBitmap&) { return nullptr; } | |
| sk_sp<SkSpecialImage> SkBaseDevice::makeSpecial(const SkImage*) { return nullptr; } | |
| sk_sp<SkSpecialImage> SkBaseDevice::snapSpecial() { return nullptr; } | |
| /////////////////////////////////////////////////////////////////////////////////////////////////// | |
| bool SkBaseDevice::readPixels(const SkPixmap& pm, int x, int y) { | |
| return this->onReadPixels(pm, x, y); | |
| } | |
| bool SkBaseDevice::writePixels(const SkPixmap& pm, int x, int y) { | |
| return this->onWritePixels(pm, x, y); | |
| } | |
| bool SkBaseDevice::onWritePixels(const SkPixmap&, int, int) { | |
| return false; | |
| } | |
| bool SkBaseDevice::onReadPixels(const SkPixmap&, int x, int y) { | |
| return false; | |
| } | |
| bool SkBaseDevice::accessPixels(SkPixmap* pmap) { | |
| SkPixmap tempStorage; | |
| if (nullptr == pmap) { | |
| pmap = &tempStorage; | |
| } | |
| return this->onAccessPixels(pmap); | |
| } | |
| bool SkBaseDevice::peekPixels(SkPixmap* pmap) { | |
| SkPixmap tempStorage; | |
| if (nullptr == pmap) { | |
| pmap = &tempStorage; | |
| } | |
| return this->onPeekPixels(pmap); | |
| } | |
| ////////////////////////////////////////////////////////////////////////////////////////// | |
| #include "SkUtils.h" | |
| void SkBaseDevice::drawGlyphRunRSXform(SkGlyphRun* run, const SkRSXform* xform) { | |
| const SkMatrix originalCTM = this->ctm(); | |
| sk_sp<SkShader> shader = sk_ref_sp(run->mutablePaint()->getShader()); | |
| auto perGlyph = [this, &xform, &originalCTM, shader] ( | |
| SkGlyphRun* glyphRun, SkPaint* runPaint) { | |
| SkMatrix ctm; | |
| ctm.setRSXform(*xform++); | |
| // We want to rotate each glyph by the rsxform, but we don't want to rotate "space" | |
| // (i.e. the shader that cares about the ctm) so we have to undo our little ctm trick | |
| // with a localmatrixshader so that the shader draws as if there was no change to the ctm. | |
| if (shader) { | |
| SkMatrix inverse; | |
| if (ctm.invert(&inverse)) { | |
| runPaint->setShader(shader->makeWithLocalMatrix(inverse)); | |
| } else { | |
| runPaint->setShader(nullptr); // can't handle this xform | |
| } | |
| } | |
| ctm.setConcat(originalCTM, ctm); | |
| this->setCTM(ctm); | |
| SkGlyphRunList glyphRunList{glyphRun}; | |
| this->drawGlyphRunList(glyphRunList); | |
| }; | |
| run->eachGlyphToGlyphRun(perGlyph); | |
| run->mutablePaint()->setShader(shader); | |
| this->setCTM(originalCTM); | |
| } | |
| ////////////////////////////////////////////////////////////////////////////////////////// | |
| sk_sp<SkSurface> SkBaseDevice::makeSurface(SkImageInfo const&, SkSurfaceProps const&) { | |
| return nullptr; | |
| } | |
| ////////////////////////////////////////////////////////////////////////////////////////// | |
| void SkBaseDevice::LogDrawScaleFactor(const SkMatrix& matrix, SkFilterQuality filterQuality) { | |
| #if SK_HISTOGRAMS_ENABLED | |
| enum ScaleFactor { | |
| kUpscale_ScaleFactor, | |
| kNoScale_ScaleFactor, | |
| kDownscale_ScaleFactor, | |
| kLargeDownscale_ScaleFactor, | |
| kLast_ScaleFactor = kLargeDownscale_ScaleFactor | |
| }; | |
| float rawScaleFactor = matrix.getMinScale(); | |
| ScaleFactor scaleFactor; | |
| if (rawScaleFactor < 0.5f) { | |
| scaleFactor = kLargeDownscale_ScaleFactor; | |
| } else if (rawScaleFactor < 1.0f) { | |
| scaleFactor = kDownscale_ScaleFactor; | |
| } else if (rawScaleFactor > 1.0f) { | |
| scaleFactor = kUpscale_ScaleFactor; | |
| } else { | |
| scaleFactor = kNoScale_ScaleFactor; | |
| } | |
| switch (filterQuality) { | |
| case kNone_SkFilterQuality: | |
| SK_HISTOGRAM_ENUMERATION("DrawScaleFactor.NoneFilterQuality", scaleFactor, | |
| kLast_ScaleFactor + 1); | |
| break; | |
| case kLow_SkFilterQuality: | |
| SK_HISTOGRAM_ENUMERATION("DrawScaleFactor.LowFilterQuality", scaleFactor, | |
| kLast_ScaleFactor + 1); | |
| break; | |
| case kMedium_SkFilterQuality: | |
| SK_HISTOGRAM_ENUMERATION("DrawScaleFactor.MediumFilterQuality", scaleFactor, | |
| kLast_ScaleFactor + 1); | |
| break; | |
| case kHigh_SkFilterQuality: | |
| SK_HISTOGRAM_ENUMERATION("DrawScaleFactor.HighFilterQuality", scaleFactor, | |
| kLast_ScaleFactor + 1); | |
| break; | |
| } | |
| // Also log filter quality independent scale factor. | |
| SK_HISTOGRAM_ENUMERATION("DrawScaleFactor.AnyFilterQuality", scaleFactor, | |
| kLast_ScaleFactor + 1); | |
| // Also log an overall histogram of filter quality. | |
| SK_HISTOGRAM_ENUMERATION("FilterQuality", filterQuality, kLast_SkFilterQuality + 1); | |
| #endif | |
| } | |