diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/src/core/SkBBoxRecord.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gfx/skia/trunk/src/core/SkBBoxRecord.cpp Wed Dec 31 06:09:35 2014 +0100 @@ -0,0 +1,302 @@ + +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "SkBBoxRecord.h" + +void SkBBoxRecord::drawOval(const SkRect& rect, const SkPaint& paint) { + if (this->transformBounds(rect, &paint)) { + INHERITED::drawOval(rect, paint); + } +} + +void SkBBoxRecord::drawRRect(const SkRRect& rrect, const SkPaint& paint) { + if (this->transformBounds(rrect.rect(), &paint)) { + INHERITED::drawRRect(rrect, paint); + } +} + +void SkBBoxRecord::drawRect(const SkRect& rect, const SkPaint& paint) { + if (this->transformBounds(rect, &paint)) { + INHERITED::drawRect(rect, paint); + } +} + +void SkBBoxRecord::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, + const SkPaint& paint) { + if (this->transformBounds(outer.rect(), &paint)) { + this->INHERITED::onDrawDRRect(outer, inner, paint); + } +} + +void SkBBoxRecord::drawPath(const SkPath& path, const SkPaint& paint) { + if (path.isInverseFillType()) { + // If path is inverse filled, use the current clip bounds as the + // path's device-space bounding box. + SkIRect clipBounds; + if (this->getClipDeviceBounds(&clipBounds)) { + this->handleBBox(SkRect::Make(clipBounds)); + INHERITED::drawPath(path, paint); + } + } else if (this->transformBounds(path.getBounds(), &paint)) { + INHERITED::drawPath(path, paint); + } +} + +void SkBBoxRecord::drawPoints(PointMode mode, size_t count, const SkPoint pts[], + const SkPaint& paint) { + SkRect bbox; + bbox.set(pts, SkToInt(count)); + // Small min width value, just to ensure hairline point bounding boxes aren't empty. + // Even though we know hairline primitives are drawn one pixel wide, we do not use a + // minimum of 1 because the playback scale factor is unknown at record time. Later + // outsets will take care of adding additional padding for antialiasing and rounding out + // to integer device coordinates, guaranteeing that the rasterized pixels will be included + // in the computed bounds. + // Note: The device coordinate outset in SkBBoxHierarchyRecord::handleBBox is currently + // done in the recording coordinate space, which is wrong. + // http://code.google.com/p/skia/issues/detail?id=1021 + static const SkScalar kMinWidth = 0.01f; + SkScalar halfStrokeWidth = SkMaxScalar(paint.getStrokeWidth(), kMinWidth) / 2; + bbox.outset(halfStrokeWidth, halfStrokeWidth); + if (this->transformBounds(bbox, &paint)) { + INHERITED::drawPoints(mode, count, pts, paint); + } +} + +void SkBBoxRecord::drawPaint(const SkPaint& paint) { + SkRect bbox; + if (this->getClipBounds(&bbox)) { + if (this->transformBounds(bbox, &paint)) { + INHERITED::drawPaint(paint); + } + } +} + +void SkBBoxRecord::clear(SkColor color) { + SkISize size = this->getDeviceSize(); + SkRect bbox = {0, 0, SkIntToScalar(size.width()), SkIntToScalar(size.height())}; + this->handleBBox(bbox); + INHERITED::clear(color); +} + +void SkBBoxRecord::drawText(const void* text, size_t byteLength, SkScalar x, SkScalar y, + const SkPaint& paint) { + SkRect bbox; + paint.measureText(text, byteLength, &bbox); + SkPaint::FontMetrics metrics; + paint.getFontMetrics(&metrics); + + // Vertical and aligned text need to be offset + if (paint.isVerticalText()) { + SkScalar h = bbox.fBottom - bbox.fTop; + if (paint.getTextAlign() == SkPaint::kCenter_Align) { + bbox.fTop -= h / 2; + bbox.fBottom -= h / 2; + } + // Pad top and bottom with max extents from FontMetrics + bbox.fBottom += metrics.fBottom; + bbox.fTop += metrics.fTop; + } else { + SkScalar w = bbox.fRight - bbox.fLeft; + if (paint.getTextAlign() == SkPaint::kCenter_Align) { + bbox.fLeft -= w / 2; + bbox.fRight -= w / 2; + } else if (paint.getTextAlign() == SkPaint::kRight_Align) { + bbox.fLeft -= w; + bbox.fRight -= w; + } + // Set vertical bounds to max extents from font metrics + bbox.fTop = metrics.fTop; + bbox.fBottom = metrics.fBottom; + } + + // Pad horizontal bounds on each side by half of max vertical extents (this is sort of + // arbitrary, but seems to produce reasonable results, if there were a way of getting max + // glyph X-extents to pad by, that may be better here, but FontMetrics fXMin and fXMax seem + // incorrect on most platforms (too small in Linux, never even set in Windows). + SkScalar pad = (metrics.fBottom - metrics.fTop) / 2; + bbox.fLeft -= pad; + bbox.fRight += pad; + + bbox.fLeft += x; + bbox.fRight += x; + bbox.fTop += y; + bbox.fBottom += y; + if (this->transformBounds(bbox, &paint)) { + INHERITED::drawText(text, byteLength, x, y, paint); + } +} + +void SkBBoxRecord::drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top, + const SkPaint* paint) { + SkRect bbox = {left, top, left + bitmap.width(), top + bitmap.height()}; + if (this->transformBounds(bbox, paint)) { + INHERITED::drawBitmap(bitmap, left, top, paint); + } +} + +void SkBBoxRecord::drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src, + const SkRect& dst, const SkPaint* paint, + DrawBitmapRectFlags flags) { + if (this->transformBounds(dst, paint)) { + INHERITED::drawBitmapRectToRect(bitmap, src, dst, paint, flags); + } +} + +void SkBBoxRecord::drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& mat, + const SkPaint* paint) { + SkMatrix m = mat; + SkRect bbox = {0, 0, SkIntToScalar(bitmap.width()), SkIntToScalar(bitmap.height())}; + m.mapRect(&bbox); + if (this->transformBounds(bbox, paint)) { + INHERITED::drawBitmapMatrix(bitmap, mat, paint); + } +} + +void SkBBoxRecord::drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center, + const SkRect& dst, const SkPaint* paint) { + if (this->transformBounds(dst, paint)) { + INHERITED::drawBitmapNine(bitmap, center, dst, paint); + } +} + +void SkBBoxRecord::drawPosText(const void* text, size_t byteLength, + const SkPoint pos[], const SkPaint& paint) { + SkRect bbox; + bbox.set(pos, paint.countText(text, byteLength)); + SkPaint::FontMetrics metrics; + paint.getFontMetrics(&metrics); + bbox.fTop += metrics.fTop; + bbox.fBottom += metrics.fBottom; + + // pad on left and right by half of max vertical glyph extents + SkScalar pad = (metrics.fTop - metrics.fBottom) / 2; + bbox.fLeft += pad; + bbox.fRight -= pad; + + if (this->transformBounds(bbox, &paint)) { + INHERITED::drawPosText(text, byteLength, pos, paint); + } +} + +void SkBBoxRecord::drawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[], + SkScalar constY, const SkPaint& paint) { + size_t numChars = paint.countText(text, byteLength); + if (numChars == 0) { + return; + } + + const SkFlatData* flatPaintData = this->getFlatPaintData(paint); + WriteTopBot(paint, *flatPaintData); + + SkScalar top = flatPaintData->topBot()[0]; + SkScalar bottom = flatPaintData->topBot()[1]; + SkScalar pad = top - bottom; + + SkRect bbox; + bbox.fLeft = SK_ScalarMax; + bbox.fRight = SK_ScalarMin; + + for (size_t i = 0; i < numChars; ++i) { + if (xpos[i] < bbox.fLeft) { + bbox.fLeft = xpos[i]; + } + if (xpos[i] > bbox.fRight) { + bbox.fRight = xpos[i]; + } + } + + // pad horizontally by max glyph height + bbox.fLeft += pad; + bbox.fRight -= pad; + + bbox.fTop = top + constY; + bbox.fBottom = bottom + constY; + + if (!this->transformBounds(bbox, &paint)) { + return; + } + // This is the equivalent of calling: + // INHERITED::drawPosTextH(text, byteLength, xpos, constY, paint); + // but we filled our flat paint beforehand so that we could get font metrics. + drawPosTextHImpl(text, byteLength, xpos, constY, paint, flatPaintData); +} + +void SkBBoxRecord::drawSprite(const SkBitmap& bitmap, int left, int top, + const SkPaint* paint) { + SkRect bbox; + bbox.set(SkIRect::MakeXYWH(left, top, bitmap.width(), bitmap.height())); + this->handleBBox(bbox); // directly call handleBBox, matrix is ignored + INHERITED::drawSprite(bitmap, left, top, paint); +} + +void SkBBoxRecord::drawTextOnPath(const void* text, size_t byteLength, + const SkPath& path, const SkMatrix* matrix, + const SkPaint& paint) { + SkRect bbox = path.getBounds(); + SkPaint::FontMetrics metrics; + paint.getFontMetrics(&metrics); + + // pad out all sides by the max glyph height above baseline + SkScalar pad = metrics.fTop; + bbox.fLeft += pad; + bbox.fRight -= pad; + bbox.fTop += pad; + bbox.fBottom -= pad; + + if (this->transformBounds(bbox, &paint)) { + INHERITED::drawTextOnPath(text, byteLength, path, matrix, paint); + } +} + +void SkBBoxRecord::drawVertices(VertexMode mode, int vertexCount, + const SkPoint vertices[], const SkPoint texs[], + const SkColor colors[], SkXfermode* xfer, + const uint16_t indices[], int indexCount, + const SkPaint& paint) { + SkRect bbox; + bbox.set(vertices, vertexCount); + if (this->transformBounds(bbox, &paint)) { + INHERITED::drawVertices(mode, vertexCount, vertices, texs, + colors, xfer, indices, indexCount, paint); + } +} + +void SkBBoxRecord::drawPicture(SkPicture& picture) { + if (picture.width() > 0 && picture.height() > 0 && + this->transformBounds(SkRect::MakeWH(picture.width(), picture.height()), NULL)) { + INHERITED::drawPicture(picture); + } +} + +bool SkBBoxRecord::transformBounds(const SkRect& bounds, const SkPaint* paint) { + SkRect outBounds = bounds; + outBounds.sort(); + + if (paint) { + // account for stroking, path effects, shadows, etc + if (paint->canComputeFastBounds()) { + SkRect temp; + outBounds = paint->computeFastBounds(outBounds, &temp); + } else { + // set bounds to current clip + if (!this->getClipBounds(&outBounds)) { + // current clip is empty + return false; + } + } + } + + if (!outBounds.isEmpty() && !this->quickReject(outBounds)) { + this->getTotalMatrix().mapRect(&outBounds); + this->handleBBox(outBounds); + return true; + } + + return false; +}