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Fix GrAtlasTextBlob bounds management

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BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1605013002

Review URL: https://codereview.chromium.org/1605013002
This commit is contained in:
joshualitt 2016-01-20 12:35:22 -08:00 committed by Commit bot
parent 8bc3cf88bb
commit ae473fdfc3
5 changed files with 66 additions and 16 deletions
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13
src/gpu/batches/GrAtlasTextBatch.cpp
View File

@ -413,6 +413,19 @@ void GrAtlasTextBatch::onPrepareDraws(Target* target) const {
size_t byteCount = info.byteCount();
memcpy(currVertex, blob->fVertices + info.vertexStartIndex(), byteCount);
#ifdef SK_DEBUG
// bounds sanity check
SkRect rect;
rect.setLargestInverted();
SkPoint* vertex = (SkPoint*) ((char*)blob->fVertices + info.vertexStartIndex());
rect.growToInclude(vertex, vertexStride, kVerticesPerGlyph * info.glyphCount());
if (this->usesDistanceFields()) {
fBatch.fViewMatrix.mapRect(&rect);
}
SkASSERT(fBounds.contains(rect));
#endif
currVertex += byteCount;
}

23
src/gpu/batches/GrAtlasTextBatch.h
View File

@ -84,14 +84,31 @@ public:
fBatch.fViewMatrix = geo.fBlob->fViewMatrix;
// We don't yet position distance field text on the cpu, so we have to map the vertex bounds
// into device space
// into device space.
// We handle vertex bounds differently for distance field text and bitmap text because
// the vertex bounds of bitmap text are in device space. If we are flushing multiple runs
// from one blob then we are going to pay the price here of mapping the rect for each run.
const Run& run = geo.fBlob->fRuns[geo.fRun];
SkRect bounds = run.fSubRunInfo[geo.fSubRun].vertexBounds();
if (run.fSubRunInfo[geo.fSubRun].drawAsDistanceFields()) {
SkRect bounds = run.fVertexBounds;
// Distance field text is positioned with the (X,Y) as part of the glyph position,
// and currently the view matrix is applied on the GPU
bounds.offset(geo.fBlob->fX - geo.fBlob->fInitialX,
geo.fBlob->fY - geo.fBlob->fInitialY);
fBatch.fViewMatrix.mapRect(&bounds);
this->setBounds(bounds);
} else {
this->setBounds(run.fVertexBounds);
// Bitmap text is fully positioned on the CPU
SkMatrix boundsMatrix;
bounds.offset(-geo.fBlob->fInitialX, -geo.fBlob->fInitialY);
boundsMatrix.setConcat(fBatch.fViewMatrix, geo.fBlob->fInitialViewMatrixInverse);
boundsMatrix.mapRect(&bounds);
// Due to floating point numerical inaccuracies, we have to round out here
SkRect roundedOutBounds;
bounds.roundOut(&roundedOutBounds);
roundedOutBounds.offset(geo.fBlob->fX, geo.fBlob->fY);
this->setBounds(roundedOutBounds);
}
}

4
src/gpu/text/GrAtlasTextBlob.cpp
View File

@ -63,7 +63,7 @@ void GrAtlasTextBlob::appendGlyph(int runIndex,
subRun->setMaskFormat(format);
run.fVertexBounds.joinNonEmptyArg(positions);
subRun->joinGlyphBounds(positions);
subRun->setColor(color);
intptr_t vertex = reinterpret_cast<intptr_t>(this->fVertices + subRun->vertexEndIndex());
@ -219,7 +219,6 @@ bool GrAtlasTextBlob::mustRegenerate(SkScalar* outTransX, SkScalar* outTransY,
(*outTransY) = y - fY;
}
// If we can reuse the blob, then make sure we update the blob's viewmatrix, and x/y
// offsets. Note, we offset the vertex bounds right before flushing
fViewMatrix = viewMatrix;
@ -383,7 +382,6 @@ void GrAtlasTextBlob::flushCached(GrContext* context,
drawFilter, viewMatrix, clipBounds, x, y);
continue;
}
fRuns[run].fVertexBounds.offset(transX, transY);
this->flushRun(dc, &pipelineBuilder, run, color,
transX, transY, skPaint, props,
distanceAdjustTable, context->getBatchFontCache());

38
src/gpu/text/GrAtlasTextBlob.h
View File

@ -210,13 +210,11 @@ public:
// We use this color vs the SkPaint color because it has the colorfilter applied.
void initReusableBlob(GrColor color, const SkMatrix& viewMatrix, SkScalar x, SkScalar y) {
fPaintColor = color;
fViewMatrix = viewMatrix;
fX = x;
fY = y;
this->setupViewMatrix(viewMatrix, x, y);
}
void initThrowawayBlob(const SkMatrix& viewMatrix) {
fViewMatrix = viewMatrix;
void initThrowawayBlob(const SkMatrix& viewMatrix, SkScalar x, SkScalar y) {
this->setupViewMatrix(viewMatrix, x, y);
}
GrDrawBatch* test_createBatch(int glyphCount, int run, int subRun,
@ -249,6 +247,20 @@ private:
SkDrawFilter* drawFilter, const SkMatrix& viewMatrix,
const SkIRect& clipBounds, SkScalar x, SkScalar y);
// This function will only be called when we are regenerating a blob from scratch. We record the
// initial view matrix and initial offsets(x,y), because we record vertex bounds relative to
// these numbers. When blobs are reused with new matrices, we need to return to model space so
// we can update the vertex bounds appropriately.
void setupViewMatrix(const SkMatrix& viewMatrix, SkScalar x, SkScalar y) {
fViewMatrix = viewMatrix;
if (!viewMatrix.invert(&fInitialViewMatrixInverse)) {
fInitialViewMatrixInverse = SkMatrix::I();
SkDebugf("Could not invert viewmatrix\n");
}
fX = fInitialX = x;
fY = fInitialY = y;
}
/*
* Each Run inside of the blob can have its texture coordinates regenerated if required.
* To determine if regeneration is necessary, fAtlasGeneration is used. If there have been
@ -276,7 +288,6 @@ private:
Run()
: fInitialized(false)
, fDrawAsPaths(false) {
fVertexBounds.setLargestInverted();
// To ensure we always have one subrun, we push back a fresh run here
fSubRunInfo.push_back();
}
@ -290,10 +301,13 @@ private:
, fColor(GrColor_ILLEGAL)
, fMaskFormat(kA8_GrMaskFormat)
, fDrawAsDistanceFields(false)
, fUseLCDText(false) {}
, fUseLCDText(false) {
fVertexBounds.setLargestInverted();
}
SubRunInfo(const SubRunInfo& that)
: fBulkUseToken(that.fBulkUseToken)
, fStrike(SkSafeRef(that.fStrike.get()))
, fVertexBounds(that.fVertexBounds)
, fAtlasGeneration(that.fAtlasGeneration)
, fVertexStartIndex(that.fVertexStartIndex)
, fVertexEndIndex(that.fVertexEndIndex)
@ -338,6 +352,11 @@ private:
fVertexEndIndex = prev.vertexEndIndex();
}
const SkRect& vertexBounds() const { return fVertexBounds; }
void joinGlyphBounds(const SkRect& glyphBounds) {
fVertexBounds.joinNonEmptyArg(glyphBounds);
}
// df properties
void setUseLCDText(bool useLCDText) { fUseLCDText = useLCDText; }
bool hasUseLCDText() const { return fUseLCDText; }
@ -347,6 +366,7 @@ private:
private:
GrBatchAtlas::BulkUseTokenUpdater fBulkUseToken;
SkAutoTUnref<GrBatchTextStrike> fStrike;
SkRect fVertexBounds;
uint64_t fAtlasGeneration;
size_t fVertexStartIndex;
size_t fVertexEndIndex;
@ -368,7 +388,6 @@ private:
}
static const int kMinSubRuns = 1;
SkAutoTUnref<SkTypeface> fTypeface;
SkRect fVertexBounds;
SkSTArray<kMinSubRuns, SubRunInfo> fSubRunInfo;
SkAutoDescriptor fDescriptor;
@ -423,7 +442,10 @@ private:
SkTArray<BigGlyph> fBigGlyphs;
Key fKey;
SkMatrix fViewMatrix;
SkMatrix fInitialViewMatrixInverse;
GrColor fPaintColor;
SkScalar fInitialX;
SkScalar fInitialY;
SkScalar fX;
SkScalar fY;

4
src/gpu/text/GrAtlasTextContext.cpp
View File

@ -281,7 +281,7 @@ GrAtlasTextContext::createDrawTextBlob(const GrPaint& paint, const SkPaint& skPa
int glyphCount = skPaint.countText(text, byteLength);
GrAtlasTextBlob* blob = fCache->createBlob(glyphCount, 1, GrAtlasTextBlob::kGrayTextVASize);
blob->initThrowawayBlob(viewMatrix);
blob->initThrowawayBlob(viewMatrix, x, y);
if (GrTextUtils::CanDrawAsDistanceFields(skPaint, viewMatrix, fSurfaceProps,
*fContext->caps()->shaderCaps())) {
@ -304,7 +304,7 @@ GrAtlasTextContext::createDrawPosTextBlob(const GrPaint& paint, const SkPaint& s
int glyphCount = skPaint.countText(text, byteLength);
GrAtlasTextBlob* blob = fCache->createBlob(glyphCount, 1, GrAtlasTextBlob::kGrayTextVASize);
blob->initThrowawayBlob(viewMatrix);
blob->initThrowawayBlob(viewMatrix, offset.x(), offset.y());
if (GrTextUtils::CanDrawAsDistanceFields(skPaint, viewMatrix, fSurfaceProps,
*fContext->caps()->shaderCaps())) {