| |
| /* |
| * Copyright 2006 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #include "SkMaskFilter.h" |
| #include "SkBlitter.h" |
| #include "SkBounder.h" |
| #include "SkBuffer.h" |
| #include "SkDraw.h" |
| #include "SkRasterClip.h" |
| |
| bool SkMaskFilter::filterMask(SkMask*, const SkMask&, const SkMatrix&, |
| SkIPoint*) { |
| return false; |
| } |
| |
| bool SkMaskFilter::filterPath(const SkPath& devPath, const SkMatrix& matrix, |
| const SkRasterClip& clip, SkBounder* bounder, |
| SkBlitter* blitter) { |
| SkMask srcM, dstM; |
| |
| if (!SkDraw::DrawToMask(devPath, &clip.getBounds(), this, &matrix, &srcM, |
| SkMask::kComputeBoundsAndRenderImage_CreateMode)) { |
| return false; |
| } |
| SkAutoMaskFreeImage autoSrc(srcM.fImage); |
| |
| if (!this->filterMask(&dstM, srcM, matrix, NULL)) { |
| return false; |
| } |
| SkAutoMaskFreeImage autoDst(dstM.fImage); |
| |
| // if we get here, we need to (possibly) resolve the clip and blitter |
| SkAAClipBlitterWrapper wrapper(clip, blitter); |
| blitter = wrapper.getBlitter(); |
| |
| SkRegion::Cliperator clipper(wrapper.getRgn(), dstM.fBounds); |
| |
| if (!clipper.done() && (bounder == NULL || bounder->doIRect(dstM.fBounds))) { |
| const SkIRect& cr = clipper.rect(); |
| do { |
| blitter->blitMask(dstM, cr); |
| clipper.next(); |
| } while (!clipper.done()); |
| } |
| |
| return true; |
| } |
| |
| SkMaskFilter::BlurType SkMaskFilter::asABlur(BlurInfo*) const { |
| return kNone_BlurType; |
| } |
| |
| void SkMaskFilter::computeFastBounds(const SkRect& src, SkRect* dst) { |
| SkMask srcM, dstM; |
| |
| srcM.fImage = NULL; |
| src.roundOut(&srcM.fBounds); |
| srcM.fRowBytes = 0; |
| srcM.fFormat = SkMask::kA8_Format; |
| |
| SkIPoint margin; // ignored |
| if (this->filterMask(&dstM, srcM, SkMatrix::I(), &margin)) { |
| dst->set(dstM.fBounds); |
| } else { |
| dst->set(srcM.fBounds); |
| } |
| } |
| |
| |