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