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c4b12f19a4
skia2/include/core
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senorblanco@chromium.org c4b12f19a4 Implement correct clipping for image filters. 
Image filters in Skia currently clip the size of the the offscreen
bitmap used for filtering to the device clip bounds. This means that
any pixel-moving filter (e.g., blur) has edge artifacts at the clip
boundaries. This is problematic for tiling, where a single SkPicture
is played back with a clip set to the tile boundaries.

By implementing the onFilterBounds() traversal, and using it in
saveLayer() when a filter is present, we can clip the layer to the
expanded clip rect. Note that this requires that the traversal be
performed in reverse as compared to computeFastBounds().  (It's also
done in device space, unlike computeFastBounds()).

New test imagefiltersclipped tests pixel-moving filters when clipped
by various clip rects.
New test imageblurtiled tests tiled (compositor-style) rendering of
blurred text. There should be no artifacts at the tile boundaries.

BUG=337831
R=reed@google.com

Review URL: https://codereview.chromium.org/23011012

git-svn-id: http://skia.googlecode.com/svn/trunk@13323 2bbb7eff-a529-9590-31e7-b0007b416f81
2014-02-05 17:51:22 +00:00
..
SkAdvancedTypefaceMetrics.h Revert "[PDF] Fix font embedding restrictions." 2013-12-10 17:22:41 +00:00
SkAnnotation.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkBitmap.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkBitmapDevice.h remove SkCanvas::createCompatibleDevice, and add SkCanvas::newSurface 2014-02-05 15:32:21 +00:00
SkBlitRow.h remove dst/rendertarget support for kARGB_4444_Config 2013-06-21 18:30:53 +00:00
SkBounder.h Sanitizing source files in Skia_Periodic_House_Keeping 2013-01-26 07:06:02 +00:00
SkCanvas.h Implement correct clipping for image filters. 2014-02-05 17:51:22 +00:00
SkChecksum.h Add SkChecksum::Murmur3. 2013-07-23 20:25:34 +00:00
SkChunkAlloc.h combine glyph and image bulk alloc, and adjust initial alloc size, to reduce total waste from 50% to 30% 2013-06-19 19:25:36 +00:00
SkClipStack.h Avoid re-rendering stencil clip for every draw with reducable clip stack 2013-11-05 15:03:08 +00:00
SkColor.h SkAlpha constant defs 2013-07-19 17:43:27 +00:00
SkColorFilter.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkColorPriv.h SkSplay and SkUnsplay work on any uint32_t, not just SkPMColor. 2013-12-04 00:42:07 +00:00
SkColorShader.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkColorTable.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkComposeShader.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkData.h SkOnce: add option to call another cleanup function once at exit. 2014-01-24 22:38:39 +00:00
SkDataTable.h Remove SkDataTable from SkFlattenable hierarchy. 2013-10-15 20:39:57 +00:00
SkDeque.h This CL addresses "SkCanvas::save flags are not respected by GPU backend" (https://code.google.com/p/skia/issues/detail?id=1503). 2013-08-16 00:53:34 +00:00
SkDevice.h remove SkCanvas::createCompatibleDevice, and add SkCanvas::newSurface 2014-02-05 15:32:21 +00:00
SkDeviceProperties.h Mask orientation and layout correctly. 2013-05-06 22:23:08 +00:00
SkDither.h Result of running tools/sanitize_source_files.py (which was added in https://codereview.appspot.com/6465078/) 2012-08-23 18:09:54 +00:00
SkDocument.h remove SkFloatToScalar macro 2013-11-25 19:44:07 +00:00
SkDraw.h Move distance field font code into GrDistanceFieldTextContext. 2013-12-19 16:12:25 +00:00
SkDrawFilter.h Add GPU support for roundrects 2013-04-25 15:27:00 +00:00
SkDrawLooper.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkDynamicAnnotations.h TSAN: use somewhat pithier SK_ANNOTATE_UNPROTECTED_READ. 2014-02-04 18:00:23 +00:00
SkEmptyShader.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkEndian.h SkBitmapHasher: use 64-bit-truncated MD5 instead of 64-bit CityHash 2013-05-03 17:35:39 +00:00
SkError.h Sanitizing source files in Housekeeper-Nightly 2013-09-05 07:01:19 +00:00
SkFixed.h remove SK_SUPPORTED_DEPRECATED_FIXEDROUND, no longer needed 2014-01-06 18:49:32 +00:00
SkFlate.h Result of running tools/sanitize_source_files.py (which was added in https://codereview.appspot.com/6465078/) 2012-08-23 18:09:54 +00:00
SkFlattenable.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkFlattenableBuffers.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkFlattenableSerialization.h Removed unnecessary define 2013-11-08 15:24:12 +00:00
SkFloatBits.h remove SK_SCALAR_IS_[FLOAT,FIXED] and assume floats 2013-12-17 16:44:46 +00:00
SkFloatingPoint.h Add sk_float_rsqrt with SSE + NEON fast paths. 2013-11-08 20:14:16 +00:00
SkFontHost.h Remove SK_FONTHOST_USES_FONTMGR. 2013-11-11 15:53:29 +00:00
SkFontLCDConfig.h Sanitizing source files in Skia_Periodic_House_Keeping 2013-03-13 07:01:04 +00:00
SkGeometry.h Add implicit hairline conic rendering to GPU 2013-07-12 20:15:34 +00:00
SkGraphics.h Sanitizing source files in Housekeeper-Nightly 2013-09-27 07:01:29 +00:00
SkImage.h remove (now dead code) for SK_SUPPORT_LEGACY_COLORTYPE and SK_SUPPORT_LEGACY_ALPHATYPE 2014-01-13 15:04:50 +00:00
SkImageDecoder.h Deprecate two more functions using SK_ATTR_DEPRECATED macro. 2014-01-15 00:19:21 +00:00
SkImageEncoder.h Rewrite SkTRegistry to take any trivially-copyable type. 2013-09-04 17:20:18 +00:00
SkImageFilter.h Implement correct clipping for image filters. 2014-02-05 17:51:22 +00:00
SkImageFilterUtils.h Added ctm matrix to GPU path 2013-08-05 16:53:50 +00:00
SkImageGenerator.h Add Options to SkDecodingImageGenerator, simplify API. 2014-01-02 13:15:13 +00:00
SkImageInfo.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkInstCnt.h Make leak counters thread-safe and turn them on by default for Debug 2014-01-17 17:55:02 +00:00
SkLineClipper.h Sanitizing source files in Skia_Periodic_House_Keeping 2013-01-26 07:06:02 +00:00
SkMallocPixelRef.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkMask.h Guard against most unintentionally ephemeral SkAutoFoo instantiations. 2013-11-18 16:03:59 +00:00
SkMaskFilter.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkMath.h Revert "Revert of https://codereview.chromium.org/113823003/" 2013-12-30 14:40:38 +00:00
SkMatrix.h remove SK_SCALAR_IS_[FLOAT,FIXED] and assume floats 2013-12-17 16:44:46 +00:00
SkMetaData.h Sanitizing source files in Skia_Periodic_House_Keeping 2013-01-26 07:06:02 +00:00
SkOnce.h TSAN: use somewhat pithier SK_ANNOTATE_UNPROTECTED_READ. 2014-02-04 18:00:23 +00:00
SkOSFile.h Fix bug in setting directories for tests. 2013-06-06 14:59:56 +00:00
SkPackBits.h Automatic update of all copyright notices to reflect new license terms. 2011-07-28 14:26:00 +00:00
SkPaint.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkPaintOptionsAndroid.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkPath.h add alternative to isRect named asRect 2014-01-25 16:54:31 +00:00
SkPathEffect.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkPathMeasure.h add SK_API 2013-05-08 13:25:02 +00:00
SkPathRef.h SkOnce: add option to call another cleanup function once at exit. 2014-01-24 22:38:39 +00:00
SkPicture.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkPixelRef.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkPoint.h remove SkScalarMul from public headers 2014-01-27 13:41:02 +00:00
SkPostConfig.h Make leak counters thread-safe and turn them on by default for Debug 2014-01-17 17:55:02 +00:00
SkPreConfig.h Ensure SSE2/3 is always enabled on Android. 2014-01-27 20:41:03 +00:00
SkRasterizer.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkReadBuffer.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkReader32.h Checking structure sizes before reading them from memory to avoid overflowing the buffer's stream. 2013-11-05 15:46:56 +00:00
SkRect.h speedup SkRect::intersect 2014-01-01 20:32:45 +00:00
SkRefCnt.h TSAN: use somewhat pithier SK_ANNOTATE_UNPROTECTED_READ. 2014-02-04 18:00:23 +00:00
SkRegion.h Checking structure sizes before reading them from memory to avoid overflowing the buffer's stream. 2013-11-05 15:46:56 +00:00
SkRRect.h Add SkRRect::transform. 2013-11-05 15:54:42 +00:00
SkScalar.h remove SkScalarMul from public headers 2014-01-27 13:41:02 +00:00
SkShader.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkSize.h deprecate SkScalarRound (and its ilk), use SkScalarRound[ToInt,ToScalar]. #define SK_SUPPORT_DEPRECATED_SCALARROUND for legacy clients 2013-12-17 19:22:07 +00:00
SkStream.h Remove backward compatibility shims from SkStream.h. 2013-11-13 19:53:46 +00:00
SkString.h remove SK_SCALAR_IS_[FLOAT,FIXED] and assume floats 2013-12-17 16:44:46 +00:00
SkStringUtils.h Sanitizing source files in Skia_Periodic_House_Keeping 2013-01-29 07:05:52 +00:00
SkStrokeRec.h Make GrContext cache the gpu paths 2013-11-01 15:23:44 +00:00
SkSurface.h Sanitizing source files in Housekeeper-Nightly 2014-02-05 03:01:48 +00:00
SkTArray.h Repurpose GrGLCoordTransform as GrGLProgramEffects 2013-10-03 15:17:58 +00:00
SkTDArray.h fix samplefuzz, fix some 32/64bit warnings 2014-02-04 16:03:51 +00:00
SkTDict.h Make SkTDArray accessors const-friendly. 2013-02-28 19:03:13 +00:00
SkTDStack.h Sanitizing source files in Skia_Periodic_House_Keeping 2013-01-26 07:06:02 +00:00
SkTemplates.h fix auto-delete bug that crept in with new fast blur path; is causing 2014-01-31 01:00:49 +00:00
SkThread.h Use a spinlock in SkOnce. 2014-01-08 21:15:56 +00:00
SkTileGridPicture.h Sanitizing source files in Skia_Periodic_House_Keeping 2013-03-01 12:12:55 +00:00
SkTime.h Guard against most unintentionally ephemeral SkAutoFoo instantiations. 2013-11-18 16:03:59 +00:00
SkTInternalLList.h Make SkTInternalLList::validate validate all nodes 2013-12-04 14:51:31 +00:00
SkTLazy.h Sanitizing source files in Skia_Periodic_House_Keeping 2013-04-02 07:01:34 +00:00
SkTrace.h Sanitizing source files in Skia_Periodic_House_Keeping 2013-01-26 07:06:02 +00:00
SkTRegistry.h Rewrite SkTRegistry to take any trivially-copyable type. 2013-09-04 17:20:18 +00:00
SkTSearch.h One SkTSearch to rule them all. Allow key to be of different type than the array. 2013-05-17 19:05:03 +00:00
SkTypeface.h move getAdvancedTypefaceMetrics into private, as only skia internals call it 2014-01-27 21:02:14 +00:00
SkTypes.h fix more 64bit warnings 2014-01-27 13:42:58 +00:00
SkUnitMapper.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00
SkUnPreMultiply.h Factor out UnPreMultiplyPreservingByteOrder 2014-01-15 22:24:58 +00:00
SkUtils.h More Windows 64b compilation warning fixes 2013-11-21 14:24:16 +00:00
SkWeakRefCnt.h Split atomic and mutex implementations and make inlinable. 2013-12-18 15:27:39 +00:00
SkWriteBuffer.h Set write buffer flags only in SkWriteBuffer and SkFlatController constructors. 2014-01-30 22:16:32 +00:00
SkWriter32.h Have peek32 return uint32_t& to make it harder to look at more than 4 bytes. 2014-01-31 16:22:57 +00:00
SkXfermode.h Refactor read and write buffers. 2014-01-30 18:58:24 +00:00