| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| #include "GrBitmapTextContext.h" |
| |
| #include "GrAtlas.h" |
| #include "GrBatch.h" |
| #include "GrBatchFontCache.h" |
| #include "GrBatchTarget.h" |
| #include "GrDefaultGeoProcFactory.h" |
| #include "GrDrawTarget.h" |
| #include "GrFontCache.h" |
| #include "GrFontScaler.h" |
| #include "GrIndexBuffer.h" |
| #include "GrStrokeInfo.h" |
| #include "GrTexturePriv.h" |
| |
| #include "SkAutoKern.h" |
| #include "SkColorPriv.h" |
| #include "SkDraw.h" |
| #include "SkDrawFilter.h" |
| #include "SkDrawProcs.h" |
| #include "SkGlyphCache.h" |
| #include "SkGpuDevice.h" |
| #include "SkGr.h" |
| #include "SkPath.h" |
| #include "SkRTConf.h" |
| #include "SkStrokeRec.h" |
| #include "SkTextBlob.h" |
| #include "SkTextMapStateProc.h" |
| |
| #include "effects/GrBitmapTextGeoProc.h" |
| #include "effects/GrSimpleTextureEffect.h" |
| |
| SK_CONF_DECLARE(bool, c_DumpFontCache, "gpu.dumpFontCache", false, |
| "Dump the contents of the font cache before every purge."); |
| |
| namespace { |
| static const size_t kLCDTextVASize = sizeof(SkPoint) + sizeof(SkIPoint16); |
| |
| // position + local coord |
| static const size_t kColorTextVASize = sizeof(SkPoint) + sizeof(SkIPoint16); |
| |
| static const size_t kGrayTextVASize = sizeof(SkPoint) + sizeof(GrColor) + sizeof(SkIPoint16); |
| |
| static const int kVerticesPerGlyph = 4; |
| static const int kIndicesPerGlyph = 6; |
| }; |
| |
| // TODO |
| // More tests |
| // move to SkCache |
| // handle textblobs where the whole run is larger than the cache size |
| // TODO implement micro speedy hash map for fast refing of glyphs |
| |
| GrBitmapTextContextB::GrBitmapTextContextB(GrContext* context, |
| SkGpuDevice* gpuDevice, |
| const SkDeviceProperties& properties) |
| : INHERITED(context, gpuDevice, properties) { |
| fCurrStrike = NULL; |
| } |
| |
| void GrBitmapTextContextB::ClearCacheEntry(uint32_t key, BitmapTextBlob** blob) { |
| (*blob)->unref(); |
| } |
| |
| GrBitmapTextContextB::~GrBitmapTextContextB() { |
| fCache.foreach(&GrBitmapTextContextB::ClearCacheEntry); |
| } |
| |
| GrBitmapTextContextB* GrBitmapTextContextB::Create(GrContext* context, |
| SkGpuDevice* gpuDevice, |
| const SkDeviceProperties& props) { |
| return SkNEW_ARGS(GrBitmapTextContextB, (context, gpuDevice, props)); |
| } |
| |
| bool GrBitmapTextContextB::canDraw(const GrRenderTarget*, |
| const GrClip&, |
| const GrPaint&, |
| const SkPaint& skPaint, |
| const SkMatrix& viewMatrix) { |
| return !SkDraw::ShouldDrawTextAsPaths(skPaint, viewMatrix); |
| } |
| |
| inline void GrBitmapTextContextB::init(GrRenderTarget* rt, const GrClip& clip, |
| const GrPaint& paint, const SkPaint& skPaint, |
| const SkIRect& regionClipBounds) { |
| INHERITED::init(rt, clip, paint, skPaint, regionClipBounds); |
| |
| fCurrStrike = NULL; |
| } |
| |
| bool GrBitmapTextContextB::MustRegenerateBlob(const BitmapTextBlob& blob, const SkPaint& paint, |
| const SkMatrix& viewMatrix, SkScalar x, SkScalar y) { |
| // We always regenerate blobs with patheffects or mask filters we could cache these |
| // TODO find some way to cache the maskfilter / patheffects on the textblob |
| return !blob.fViewMatrix.cheapEqualTo(viewMatrix) || blob.fX != x || blob.fY != y || |
| paint.getMaskFilter() || paint.getPathEffect() || paint.getStyle() != blob.fStyle; |
| } |
| |
| void GrBitmapTextContextB::drawTextBlob(GrRenderTarget* rt, const GrClip& clip, |
| const SkPaint& skPaint, const SkMatrix& viewMatrix, |
| const SkTextBlob* blob, SkScalar x, SkScalar y, |
| SkDrawFilter* drawFilter, const SkIRect& clipBounds) { |
| BitmapTextBlob* cacheBlob; |
| BitmapTextBlob** foundBlob = fCache.find(blob->uniqueID()); |
| |
| SkIRect clipRect; |
| clip.getConservativeBounds(rt->width(), rt->height(), &clipRect); |
| |
| if (foundBlob) { |
| cacheBlob = *foundBlob; |
| if (MustRegenerateBlob(*cacheBlob, skPaint, viewMatrix, x, y)) { |
| // We can get away with reusing the blob if there are no outstanding refs on it. |
| // However, we still have to reset all of the runs. |
| if (!cacheBlob->unique()) { |
| cacheBlob->unref(); |
| cacheBlob = SkNEW(BitmapTextBlob); |
| fCache.set(blob->uniqueID(), cacheBlob); |
| } |
| this->regenerateTextBlob(cacheBlob, skPaint, viewMatrix, blob, x, y, drawFilter, |
| clipRect); |
| } |
| } else { |
| cacheBlob = SkNEW(BitmapTextBlob); |
| fCache.set(blob->uniqueID(), cacheBlob); |
| this->regenerateTextBlob(cacheBlob, skPaint, viewMatrix, blob, x, y, drawFilter, clipRect); |
| } |
| |
| // Though for the time being runs in the textblob can override the paint, they only touch font |
| // info. |
| GrPaint grPaint; |
| SkPaint2GrPaintShader(fContext, rt, skPaint, viewMatrix, true, &grPaint); |
| |
| this->flush(fContext->getTextTarget(), cacheBlob, rt, grPaint, clip, viewMatrix, |
| fSkPaint.getAlpha()); |
| } |
| |
| void GrBitmapTextContextB::regenerateTextBlob(BitmapTextBlob* cacheBlob, |
| const SkPaint& skPaint, const SkMatrix& viewMatrix, |
| const SkTextBlob* blob, SkScalar x, SkScalar y, |
| SkDrawFilter* drawFilter, const SkIRect& clipRect) { |
| cacheBlob->fViewMatrix = viewMatrix; |
| cacheBlob->fX = x; |
| cacheBlob->fY = y; |
| cacheBlob->fStyle = skPaint.getStyle(); |
| cacheBlob->fRuns.reset(blob->fRunCount); |
| |
| // Regenerate textblob |
| SkPaint runPaint = skPaint; |
| SkTextBlob::RunIterator it(blob); |
| for (int run = 0; !it.done(); it.next(), run++) { |
| size_t textLen = it.glyphCount() * sizeof(uint16_t); |
| const SkPoint& offset = it.offset(); |
| // applyFontToPaint() always overwrites the exact same attributes, |
| // so it is safe to not re-seed the paint for this reason. |
| it.applyFontToPaint(&runPaint); |
| |
| if (drawFilter && !drawFilter->filter(&runPaint, SkDrawFilter::kText_Type)) { |
| // A false return from filter() means we should abort the current draw. |
| runPaint = skPaint; |
| continue; |
| } |
| |
| runPaint.setFlags(fGpuDevice->filterTextFlags(runPaint)); |
| |
| switch (it.positioning()) { |
| case SkTextBlob::kDefault_Positioning: |
| this->internalDrawText(cacheBlob, run, runPaint, viewMatrix, |
| (const char *)it.glyphs(), textLen, |
| x + offset.x(), y + offset.y(), clipRect); |
| break; |
| case SkTextBlob::kHorizontal_Positioning: |
| this->internalDrawPosText(cacheBlob, run, runPaint, viewMatrix, |
| (const char*)it.glyphs(), textLen, it.pos(), 1, |
| SkPoint::Make(x, y + offset.y()), clipRect); |
| break; |
| case SkTextBlob::kFull_Positioning: |
| this->internalDrawPosText(cacheBlob, run, runPaint, viewMatrix, |
| (const char*)it.glyphs(), textLen, it.pos(), 2, |
| SkPoint::Make(x, y), clipRect); |
| break; |
| } |
| |
| if (drawFilter) { |
| // A draw filter may change the paint arbitrarily, so we must re-seed in this case. |
| runPaint = skPaint; |
| } |
| } |
| } |
| |
| void GrBitmapTextContextB::onDrawText(GrRenderTarget* rt, const GrClip& clip, |
| const GrPaint& paint, const SkPaint& skPaint, |
| const SkMatrix& viewMatrix, |
| const char text[], size_t byteLength, |
| SkScalar x, SkScalar y, const SkIRect& regionClipBounds) { |
| SkAutoTUnref<BitmapTextBlob> blob(SkNEW(BitmapTextBlob)); |
| blob->fViewMatrix = viewMatrix; |
| blob->fX = x; |
| blob->fY = y; |
| blob->fStyle = skPaint.getStyle(); |
| blob->fRuns.push_back(); |
| |
| SkIRect clipRect; |
| clip.getConservativeBounds(rt->width(), rt->height(), &clipRect); |
| this->internalDrawText(blob, 0, skPaint, viewMatrix, text, byteLength, x, y, clipRect); |
| this->flush(fContext->getTextTarget(), blob, rt, paint, clip, viewMatrix, skPaint.getAlpha()); |
| } |
| |
| void GrBitmapTextContextB::internalDrawText(BitmapTextBlob* blob, int runIndex, |
| const SkPaint& skPaint, |
| const SkMatrix& viewMatrix, |
| const char text[], size_t byteLength, |
| SkScalar x, SkScalar y, const SkIRect& clipRect) { |
| SkASSERT(byteLength == 0 || text != NULL); |
| |
| // nothing to draw |
| if (text == NULL || byteLength == 0) { |
| return; |
| } |
| |
| fCurrStrike = NULL; |
| SkDrawCacheProc glyphCacheProc = skPaint.getDrawCacheProc(); |
| |
| // Get GrFontScaler from cache |
| BitmapTextBlob::Run& run = blob->fRuns[runIndex]; |
| run.fDescriptor.reset(skPaint.getScalerContextDescriptor(&fDeviceProperties, &viewMatrix, |
| false)); |
| run.fTypeface.reset(SkSafeRef(skPaint.getTypeface())); |
| const SkDescriptor* desc = reinterpret_cast<const SkDescriptor*>(run.fDescriptor->data()); |
| SkGlyphCache* cache = SkGlyphCache::DetachCache(run.fTypeface, desc); |
| GrFontScaler* fontScaler = GetGrFontScaler(cache); |
| |
| // transform our starting point |
| { |
| SkPoint loc; |
| viewMatrix.mapXY(x, y, &loc); |
| x = loc.fX; |
| y = loc.fY; |
| } |
| |
| // need to measure first |
| if (skPaint.getTextAlign() != SkPaint::kLeft_Align) { |
| SkVector stopVector; |
| MeasureText(cache, glyphCacheProc, text, byteLength, &stopVector); |
| |
| SkScalar stopX = stopVector.fX; |
| SkScalar stopY = stopVector.fY; |
| |
| if (skPaint.getTextAlign() == SkPaint::kCenter_Align) { |
| stopX = SkScalarHalf(stopX); |
| stopY = SkScalarHalf(stopY); |
| } |
| x -= stopX; |
| y -= stopY; |
| } |
| |
| const char* stop = text + byteLength; |
| |
| SkAutoKern autokern; |
| |
| SkFixed fxMask = ~0; |
| SkFixed fyMask = ~0; |
| SkScalar halfSampleX, halfSampleY; |
| if (cache->isSubpixel()) { |
| halfSampleX = halfSampleY = SkFixedToScalar(SkGlyph::kSubpixelRound); |
| SkAxisAlignment baseline = SkComputeAxisAlignmentForHText(viewMatrix); |
| if (kX_SkAxisAlignment == baseline) { |
| fyMask = 0; |
| halfSampleY = SK_ScalarHalf; |
| } else if (kY_SkAxisAlignment == baseline) { |
| fxMask = 0; |
| halfSampleX = SK_ScalarHalf; |
| } |
| } else { |
| halfSampleX = halfSampleY = SK_ScalarHalf; |
| } |
| |
| Sk48Dot16 fx = SkScalarTo48Dot16(x + halfSampleX); |
| Sk48Dot16 fy = SkScalarTo48Dot16(y + halfSampleY); |
| |
| while (text < stop) { |
| const SkGlyph& glyph = glyphCacheProc(cache, &text, fx & fxMask, fy & fyMask); |
| |
| fx += autokern.adjust(glyph); |
| |
| if (glyph.fWidth) { |
| this->appendGlyph(blob, |
| runIndex, |
| GrGlyph::Pack(glyph.getGlyphID(), |
| glyph.getSubXFixed(), |
| glyph.getSubYFixed(), |
| GrGlyph::kCoverage_MaskStyle), |
| Sk48Dot16FloorToInt(fx), |
| Sk48Dot16FloorToInt(fy), |
| fontScaler, |
| clipRect); |
| } |
| |
| fx += glyph.fAdvanceX; |
| fy += glyph.fAdvanceY; |
| } |
| |
| SkGlyphCache::AttachCache(cache); |
| } |
| |
| void GrBitmapTextContextB::onDrawPosText(GrRenderTarget* rt, const GrClip& clip, |
| const GrPaint& paint, const SkPaint& skPaint, |
| const SkMatrix& viewMatrix, |
| const char text[], size_t byteLength, |
| const SkScalar pos[], int scalarsPerPosition, |
| const SkPoint& offset, const SkIRect& regionClipBounds) { |
| SkAutoTUnref<BitmapTextBlob> blob(SkNEW(BitmapTextBlob)); |
| blob->fStyle = skPaint.getStyle(); |
| blob->fRuns.push_back(); |
| blob->fViewMatrix = viewMatrix; |
| |
| SkIRect clipRect; |
| clip.getConservativeBounds(rt->width(), rt->height(), &clipRect); |
| this->internalDrawPosText(blob, 0, skPaint, viewMatrix, text, byteLength, pos, |
| scalarsPerPosition, offset, clipRect); |
| this->flush(fContext->getTextTarget(), blob, rt, paint, clip, viewMatrix, fSkPaint.getAlpha()); |
| } |
| |
| void GrBitmapTextContextB::internalDrawPosText(BitmapTextBlob* blob, int runIndex, |
| const SkPaint& skPaint, |
| const SkMatrix& viewMatrix, |
| const char text[], size_t byteLength, |
| const SkScalar pos[], int scalarsPerPosition, |
| const SkPoint& offset, const SkIRect& clipRect) { |
| SkASSERT(byteLength == 0 || text != NULL); |
| SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition); |
| |
| // nothing to draw |
| if (text == NULL || byteLength == 0) { |
| return; |
| } |
| |
| fCurrStrike = NULL; |
| SkDrawCacheProc glyphCacheProc = skPaint.getDrawCacheProc(); |
| |
| // Get GrFontScaler from cache |
| BitmapTextBlob::Run& run = blob->fRuns[runIndex]; |
| run.fDescriptor.reset(skPaint.getScalerContextDescriptor(&fDeviceProperties, &viewMatrix, |
| false)); |
| run.fTypeface.reset(SkSafeRef(skPaint.getTypeface())); |
| const SkDescriptor* desc = reinterpret_cast<const SkDescriptor*>(run.fDescriptor->data()); |
| SkGlyphCache* cache = SkGlyphCache::DetachCache(run.fTypeface, desc); |
| GrFontScaler* fontScaler = GetGrFontScaler(cache); |
| |
| const char* stop = text + byteLength; |
| SkTextAlignProc alignProc(skPaint.getTextAlign()); |
| SkTextMapStateProc tmsProc(viewMatrix, offset, scalarsPerPosition); |
| SkScalar halfSampleX = 0, halfSampleY = 0; |
| |
| if (cache->isSubpixel()) { |
| // maybe we should skip the rounding if linearText is set |
| SkAxisAlignment baseline = SkComputeAxisAlignmentForHText(viewMatrix); |
| |
| SkFixed fxMask = ~0; |
| SkFixed fyMask = ~0; |
| if (kX_SkAxisAlignment == baseline) { |
| fyMask = 0; |
| halfSampleY = SK_ScalarHalf; |
| } else if (kY_SkAxisAlignment == baseline) { |
| fxMask = 0; |
| halfSampleX = SK_ScalarHalf; |
| } |
| |
| if (SkPaint::kLeft_Align == skPaint.getTextAlign()) { |
| while (text < stop) { |
| SkPoint tmsLoc; |
| tmsProc(pos, &tmsLoc); |
| Sk48Dot16 fx = SkScalarTo48Dot16(tmsLoc.fX + halfSampleX); |
| Sk48Dot16 fy = SkScalarTo48Dot16(tmsLoc.fY + halfSampleY); |
| |
| const SkGlyph& glyph = glyphCacheProc(cache, &text, |
| fx & fxMask, fy & fyMask); |
| |
| if (glyph.fWidth) { |
| this->appendGlyph(blob, |
| runIndex, |
| GrGlyph::Pack(glyph.getGlyphID(), |
| glyph.getSubXFixed(), |
| glyph.getSubYFixed(), |
| GrGlyph::kCoverage_MaskStyle), |
| Sk48Dot16FloorToInt(fx), |
| Sk48Dot16FloorToInt(fy), |
| fontScaler, |
| clipRect); |
| } |
| pos += scalarsPerPosition; |
| } |
| } else { |
| while (text < stop) { |
| const char* currentText = text; |
| const SkGlyph& metricGlyph = glyphCacheProc(cache, &text, 0, 0); |
| |
| if (metricGlyph.fWidth) { |
| SkDEBUGCODE(SkFixed prevAdvX = metricGlyph.fAdvanceX;) |
| SkDEBUGCODE(SkFixed prevAdvY = metricGlyph.fAdvanceY;) |
| SkPoint tmsLoc; |
| tmsProc(pos, &tmsLoc); |
| SkPoint alignLoc; |
| alignProc(tmsLoc, metricGlyph, &alignLoc); |
| |
| Sk48Dot16 fx = SkScalarTo48Dot16(alignLoc.fX + halfSampleX); |
| Sk48Dot16 fy = SkScalarTo48Dot16(alignLoc.fY + halfSampleY); |
| |
| // have to call again, now that we've been "aligned" |
| const SkGlyph& glyph = glyphCacheProc(cache, ¤tText, |
| fx & fxMask, fy & fyMask); |
| // the assumption is that the metrics haven't changed |
| SkASSERT(prevAdvX == glyph.fAdvanceX); |
| SkASSERT(prevAdvY == glyph.fAdvanceY); |
| SkASSERT(glyph.fWidth); |
| |
| this->appendGlyph(blob, |
| runIndex, |
| GrGlyph::Pack(glyph.getGlyphID(), |
| glyph.getSubXFixed(), |
| glyph.getSubYFixed(), |
| GrGlyph::kCoverage_MaskStyle), |
| Sk48Dot16FloorToInt(fx), |
| Sk48Dot16FloorToInt(fy), |
| fontScaler, |
| clipRect); |
| } |
| pos += scalarsPerPosition; |
| } |
| } |
| } else { // not subpixel |
| |
| if (SkPaint::kLeft_Align == skPaint.getTextAlign()) { |
| while (text < stop) { |
| // the last 2 parameters are ignored |
| const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0); |
| |
| if (glyph.fWidth) { |
| SkPoint tmsLoc; |
| tmsProc(pos, &tmsLoc); |
| |
| Sk48Dot16 fx = SkScalarTo48Dot16(tmsLoc.fX + SK_ScalarHalf); //halfSampleX; |
| Sk48Dot16 fy = SkScalarTo48Dot16(tmsLoc.fY + SK_ScalarHalf); //halfSampleY; |
| this->appendGlyph(blob, |
| runIndex, |
| GrGlyph::Pack(glyph.getGlyphID(), |
| glyph.getSubXFixed(), |
| glyph.getSubYFixed(), |
| GrGlyph::kCoverage_MaskStyle), |
| Sk48Dot16FloorToInt(fx), |
| Sk48Dot16FloorToInt(fy), |
| fontScaler, |
| clipRect); |
| } |
| pos += scalarsPerPosition; |
| } |
| } else { |
| while (text < stop) { |
| // the last 2 parameters are ignored |
| const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0); |
| |
| if (glyph.fWidth) { |
| SkPoint tmsLoc; |
| tmsProc(pos, &tmsLoc); |
| |
| SkPoint alignLoc; |
| alignProc(tmsLoc, glyph, &alignLoc); |
| |
| Sk48Dot16 fx = SkScalarTo48Dot16(alignLoc.fX + SK_ScalarHalf); //halfSampleX; |
| Sk48Dot16 fy = SkScalarTo48Dot16(alignLoc.fY + SK_ScalarHalf); //halfSampleY; |
| this->appendGlyph(blob, |
| runIndex, |
| GrGlyph::Pack(glyph.getGlyphID(), |
| glyph.getSubXFixed(), |
| glyph.getSubYFixed(), |
| GrGlyph::kCoverage_MaskStyle), |
| Sk48Dot16FloorToInt(fx), |
| Sk48Dot16FloorToInt(fy), |
| fontScaler, |
| clipRect); |
| } |
| pos += scalarsPerPosition; |
| } |
| } |
| } |
| SkGlyphCache::AttachCache(cache); |
| } |
| |
| static size_t get_vertex_stride(GrMaskFormat maskFormat) { |
| switch (maskFormat) { |
| case kA8_GrMaskFormat: |
| return kGrayTextVASize; |
| case kARGB_GrMaskFormat: |
| return kColorTextVASize; |
| default: |
| return kLCDTextVASize; |
| } |
| } |
| |
| void GrBitmapTextContextB::appendGlyph(BitmapTextBlob* blob, int runIndex, GrGlyph::PackedID packed, |
| int vx, int vy, GrFontScaler* scaler, |
| const SkIRect& clipRect) { |
| if (NULL == fCurrStrike) { |
| fCurrStrike = fContext->getBatchFontCache()->getStrike(scaler); |
| } |
| |
| GrGlyph* glyph = fCurrStrike->getGlyph(packed, scaler); |
| if (NULL == glyph || glyph->fBounds.isEmpty()) { |
| return; |
| } |
| |
| int x = vx + glyph->fBounds.fLeft; |
| int y = vy + glyph->fBounds.fTop; |
| |
| // keep them as ints until we've done the clip-test |
| int width = glyph->fBounds.width(); |
| int height = glyph->fBounds.height(); |
| |
| // check if we clipped out |
| if (clipRect.quickReject(x, y, x + width, y + height)) { |
| return; |
| } |
| |
| // If the glyph is too large we fall back to paths |
| if (fCurrStrike->glyphTooLargeForAtlas(glyph)) { |
| if (NULL == glyph->fPath) { |
| SkPath* path = SkNEW(SkPath); |
| if (!scaler->getGlyphPath(glyph->glyphID(), path)) { |
| // flag the glyph as being dead? |
| SkDELETE(path); |
| return; |
| } |
| glyph->fPath = path; |
| } |
| SkASSERT(glyph->fPath); |
| blob->fBigGlyphs.push_back(BitmapTextBlob::BigGlyph(*glyph->fPath, vx, vy)); |
| return; |
| } |
| GrMaskFormat format = glyph->fMaskFormat; |
| size_t vertexStride = get_vertex_stride(format); |
| |
| BitmapTextBlob::Run& run = blob->fRuns[runIndex]; |
| int glyphIdx = run.fInfos[format].fGlyphIDs.count(); |
| *run.fInfos[format].fGlyphIDs.append() = packed; |
| run.fInfos[format].fVertices.append(static_cast<int>(vertexStride * kVerticesPerGlyph)); |
| |
| SkRect r; |
| r.fLeft = SkIntToScalar(x); |
| r.fTop = SkIntToScalar(y); |
| r.fRight = r.fLeft + SkIntToScalar(width); |
| r.fBottom = r.fTop + SkIntToScalar(height); |
| |
| run.fVertexBounds.joinNonEmptyArg(r); |
| GrColor color = fPaint.getColor(); |
| run.fColor = color; |
| |
| intptr_t vertex = reinterpret_cast<intptr_t>(run.fInfos[format].fVertices.begin()); |
| vertex += vertexStride * glyphIdx * kVerticesPerGlyph; |
| |
| // V0 |
| SkPoint* position = reinterpret_cast<SkPoint*>(vertex); |
| position->set(r.fLeft, r.fTop); |
| if (kA8_GrMaskFormat == format) { |
| SkColor* colorPtr = reinterpret_cast<SkColor*>(vertex + sizeof(SkPoint)); |
| *colorPtr = color; |
| } |
| vertex += vertexStride; |
| |
| // V1 |
| position = reinterpret_cast<SkPoint*>(vertex); |
| position->set(r.fLeft, r.fBottom); |
| if (kA8_GrMaskFormat == format) { |
| SkColor* colorPtr = reinterpret_cast<SkColor*>(vertex + sizeof(SkPoint)); |
| *colorPtr = color; |
| } |
| vertex += vertexStride; |
| |
| // V2 |
| position = reinterpret_cast<SkPoint*>(vertex); |
| position->set(r.fRight, r.fBottom); |
| if (kA8_GrMaskFormat == format) { |
| SkColor* colorPtr = reinterpret_cast<SkColor*>(vertex + sizeof(SkPoint)); |
| *colorPtr = color; |
| } |
| vertex += vertexStride; |
| |
| // V3 |
| position = reinterpret_cast<SkPoint*>(vertex); |
| position->set(r.fRight, r.fTop); |
| if (kA8_GrMaskFormat == format) { |
| SkColor* colorPtr = reinterpret_cast<SkColor*>(vertex + sizeof(SkPoint)); |
| *colorPtr = color; |
| } |
| } |
| |
| class BitmapTextBatch : public GrBatch { |
| public: |
| typedef GrBitmapTextContextB::BitmapTextBlob Blob; |
| typedef Blob::Run Run; |
| typedef Run::PerFormatInfo TextInfo; |
| struct Geometry { |
| Geometry() {} |
| Geometry(const Geometry& geometry) |
| : fBlob(SkRef(geometry.fBlob.get())) |
| , fRun(geometry.fRun) |
| , fColor(geometry.fColor) {} |
| SkAutoTUnref<Blob> fBlob; |
| int fRun; |
| GrColor fColor; |
| }; |
| |
| static GrBatch* Create(const Geometry& geometry, GrColor color, GrMaskFormat maskFormat, |
| GrBatchFontCache* fontCache) { |
| return SkNEW_ARGS(BitmapTextBatch, (geometry, color, maskFormat, fontCache)); |
| } |
| |
| const char* name() const override { return "BitmapTextBatch"; } |
| |
| void getInvariantOutputColor(GrInitInvariantOutput* out) const override { |
| if (kARGB_GrMaskFormat == fMaskFormat) { |
| out->setUnknownFourComponents(); |
| } else { |
| out->setKnownFourComponents(fBatch.fColor); |
| } |
| } |
| |
| void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override { |
| if (kARGB_GrMaskFormat != fMaskFormat) { |
| if (GrPixelConfigIsAlphaOnly(fPixelConfig)) { |
| out->setUnknownSingleComponent(); |
| } else if (GrPixelConfigIsOpaque(fPixelConfig)) { |
| out->setUnknownOpaqueFourComponents(); |
| out->setUsingLCDCoverage(); |
| } else { |
| out->setUnknownFourComponents(); |
| out->setUsingLCDCoverage(); |
| } |
| } else { |
| out->setKnownSingleComponent(0xff); |
| } |
| } |
| |
| void initBatchTracker(const GrPipelineInfo& init) override { |
| // Handle any color overrides |
| if (init.fColorIgnored) { |
| fBatch.fColor = GrColor_ILLEGAL; |
| } else if (GrColor_ILLEGAL != init.fOverrideColor) { |
| fBatch.fColor = init.fOverrideColor; |
| } |
| |
| // setup batch properties |
| fBatch.fColorIgnored = init.fColorIgnored; |
| fBatch.fUsesLocalCoords = init.fUsesLocalCoords; |
| fBatch.fCoverageIgnored = init.fCoverageIgnored; |
| } |
| |
| void generateGeometry(GrBatchTarget* batchTarget, const GrPipeline* pipeline) override { |
| // if we have RGB, then we won't have any SkShaders so no need to use a localmatrix. |
| // TODO actually only invert if we don't have RGBA |
| SkMatrix localMatrix; |
| if (this->usesLocalCoords() && !this->viewMatrix().invert(&localMatrix)) { |
| SkDebugf("Cannot invert viewmatrix\n"); |
| return; |
| } |
| |
| GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kNone_FilterMode); |
| // This will be ignored in the non A8 case |
| bool opaqueVertexColors = GrColorIsOpaque(this->color()); |
| SkAutoTUnref<const GrGeometryProcessor> gp( |
| GrBitmapTextGeoProc::Create(this->color(), |
| fFontCache->getTexture(fMaskFormat), |
| params, |
| fMaskFormat, |
| opaqueVertexColors, |
| localMatrix)); |
| |
| size_t vertexStride = gp->getVertexStride(); |
| SkASSERT(vertexStride == get_vertex_stride(fMaskFormat)); |
| |
| this->initDraw(batchTarget, gp, pipeline); |
| |
| int glyphCount = this->numGlyphs(); |
| int instanceCount = fGeoData.count(); |
| const GrVertexBuffer* vertexBuffer; |
| int firstVertex; |
| |
| void* vertices = batchTarget->vertexPool()->makeSpace(vertexStride, |
| glyphCount * kVerticesPerGlyph, |
| &vertexBuffer, |
| &firstVertex); |
| if (!vertices) { |
| SkDebugf("Could not allocate vertices\n"); |
| return; |
| } |
| |
| unsigned char* currVertex = reinterpret_cast<unsigned char*>(vertices); |
| |
| // setup drawinfo |
| const GrIndexBuffer* quadIndexBuffer = batchTarget->quadIndexBuffer(); |
| int maxInstancesPerDraw = quadIndexBuffer->maxQuads(); |
| |
| GrDrawTarget::DrawInfo drawInfo; |
| drawInfo.setPrimitiveType(kTriangles_GrPrimitiveType); |
| drawInfo.setStartVertex(0); |
| drawInfo.setStartIndex(0); |
| drawInfo.setVerticesPerInstance(kVerticesPerGlyph); |
| drawInfo.setIndicesPerInstance(kIndicesPerGlyph); |
| drawInfo.adjustStartVertex(firstVertex); |
| drawInfo.setVertexBuffer(vertexBuffer); |
| drawInfo.setIndexBuffer(quadIndexBuffer); |
| |
| int instancesToFlush = 0; |
| for (int i = 0; i < instanceCount; i++) { |
| Geometry& args = fGeoData[i]; |
| Blob* blob = args.fBlob; |
| Run& run = blob->fRuns[args.fRun]; |
| TextInfo& info = run.fInfos[fMaskFormat]; |
| |
| uint64_t currentAtlasGen = fFontCache->atlasGeneration(fMaskFormat); |
| bool regenerateTextureCoords = info.fAtlasGeneration != currentAtlasGen; |
| bool regenerateColors = kA8_GrMaskFormat == fMaskFormat && run.fColor != args.fColor; |
| int glyphCount = info.fGlyphIDs.count(); |
| |
| // We regenerate both texture coords and colors in the blob itself, and update the |
| // atlas generation. If we don't end up purging any unused plots, we can avoid |
| // regenerating the coords. We could take a finer grained approach to updating texture |
| // coords but its not clear if the extra bookkeeping would offset any gains. |
| // To avoid looping over the glyphs twice, we do one loop and conditionally update color |
| // or coords as needed. One final note, if we have to break a run for an atlas eviction |
| // then we can't really trust the atlas has all of the correct data. Atlas evictions |
| // should be pretty rare, so we just always regenerate in those cases |
| if (regenerateTextureCoords || regenerateColors) { |
| // first regenerate texture coordinates / colors if need be |
| const SkDescriptor* desc = NULL; |
| SkGlyphCache* cache = NULL; |
| GrFontScaler* scaler = NULL; |
| GrBatchTextStrike* strike = NULL; |
| bool brokenRun = false; |
| if (regenerateTextureCoords) { |
| desc = reinterpret_cast<const SkDescriptor*>(run.fDescriptor->data()); |
| cache = SkGlyphCache::DetachCache(run.fTypeface, desc); |
| scaler = GrTextContext::GetGrFontScaler(cache); |
| strike = fFontCache->getStrike(scaler); |
| } |
| for (int glyphIdx = 0; glyphIdx < glyphCount; glyphIdx++) { |
| GrGlyph::PackedID glyphID = info.fGlyphIDs[glyphIdx]; |
| |
| if (regenerateTextureCoords) { |
| // Upload the glyph only if needed |
| GrGlyph* glyph = strike->getGlyph(glyphID, scaler); |
| SkASSERT(glyph); |
| |
| if (!fFontCache->hasGlyph(glyph) && |
| !strike->addGlyphToAtlas(batchTarget, glyph, scaler)) { |
| this->flush(batchTarget, &drawInfo, instancesToFlush, |
| maxInstancesPerDraw); |
| this->initDraw(batchTarget, gp, pipeline); |
| instancesToFlush = 0; |
| brokenRun = glyphIdx > 0; |
| |
| SkDEBUGCODE(bool success =) strike->addGlyphToAtlas(batchTarget, glyph, |
| scaler); |
| SkASSERT(success); |
| } |
| |
| fFontCache->setGlyphRefToken(glyph, batchTarget->currentToken()); |
| |
| // Texture coords are the last vertex attribute so we get a pointer to the |
| // first one and then map with stride in regenerateTextureCoords |
| intptr_t vertex = reinterpret_cast<intptr_t>(info.fVertices.begin()); |
| vertex += vertexStride * glyphIdx * kVerticesPerGlyph; |
| vertex += vertexStride - sizeof(SkIPoint16); |
| |
| this->regenerateTextureCoords(glyph, vertex, vertexStride); |
| } |
| |
| if (regenerateColors) { |
| intptr_t vertex = reinterpret_cast<intptr_t>(info.fVertices.begin()); |
| vertex += vertexStride * glyphIdx * kVerticesPerGlyph + sizeof(SkPoint); |
| this->regenerateColors(vertex, vertexStride, args.fColor); |
| } |
| |
| instancesToFlush++; |
| } |
| |
| if (regenerateTextureCoords) { |
| SkGlyphCache::AttachCache(cache); |
| info.fAtlasGeneration = brokenRun ? GrBatchAtlas::kInvalidAtlasGeneration : |
| fFontCache->atlasGeneration(fMaskFormat); |
| } |
| } else { |
| instancesToFlush += glyphCount; |
| } |
| |
| // now copy all vertices |
| int byteCount = info.fVertices.count(); |
| memcpy(currVertex, info.fVertices.begin(), byteCount); |
| |
| currVertex += byteCount; |
| } |
| |
| this->flush(batchTarget, &drawInfo, instancesToFlush, maxInstancesPerDraw); |
| } |
| |
| SkSTArray<1, Geometry, true>* geoData() { return &fGeoData; } |
| |
| private: |
| BitmapTextBatch(const Geometry& geometry, GrColor color, GrMaskFormat maskFormat, |
| GrBatchFontCache* fontCache) |
| : fMaskFormat(maskFormat) |
| , fPixelConfig(fontCache->getPixelConfig(maskFormat)) |
| , fFontCache(fontCache) { |
| this->initClassID<BitmapTextBatch>(); |
| fGeoData.push_back(geometry); |
| fBatch.fColor = color; |
| fBatch.fViewMatrix = geometry.fBlob->fViewMatrix; |
| int numGlyphs = geometry.fBlob->fRuns[geometry.fRun].fInfos[maskFormat].fGlyphIDs.count(); |
| fBatch.fNumGlyphs = numGlyphs; |
| } |
| |
| void regenerateTextureCoords(GrGlyph* glyph, intptr_t vertex, size_t vertexStride) { |
| int width = glyph->fBounds.width(); |
| int height = glyph->fBounds.height(); |
| int u0 = glyph->fAtlasLocation.fX; |
| int v0 = glyph->fAtlasLocation.fY; |
| int u1 = u0 + width; |
| int v1 = v0 + height; |
| |
| // we assume texture coords are the last vertex attribute, this is a bit fragile. |
| // TODO pass in this offset or something |
| SkIPoint16* textureCoords; |
| // V0 |
| textureCoords = reinterpret_cast<SkIPoint16*>(vertex); |
| textureCoords->set(u0, v0); |
| vertex += vertexStride; |
| |
| // V1 |
| textureCoords = reinterpret_cast<SkIPoint16*>(vertex); |
| textureCoords->set(u0, v1); |
| vertex += vertexStride; |
| |
| // V2 |
| textureCoords = reinterpret_cast<SkIPoint16*>(vertex); |
| textureCoords->set(u1, v1); |
| vertex += vertexStride; |
| |
| // V3 |
| textureCoords = reinterpret_cast<SkIPoint16*>(vertex); |
| textureCoords->set(u1, v0); |
| } |
| |
| void regenerateColors(intptr_t vertex, size_t vertexStride, GrColor color) { |
| for (int i = 0; i < kVerticesPerGlyph; i++) { |
| SkColor* vcolor = reinterpret_cast<SkColor*>(vertex); |
| *vcolor = color; |
| vertex += vertexStride; |
| } |
| } |
| |
| void initDraw(GrBatchTarget* batchTarget, |
| const GrGeometryProcessor* gp, |
| const GrPipeline* pipeline) { |
| batchTarget->initDraw(gp, pipeline); |
| |
| // TODO remove this when batch is everywhere |
| GrPipelineInfo init; |
| init.fColorIgnored = fBatch.fColorIgnored; |
| init.fOverrideColor = GrColor_ILLEGAL; |
| init.fCoverageIgnored = fBatch.fCoverageIgnored; |
| init.fUsesLocalCoords = this->usesLocalCoords(); |
| gp->initBatchTracker(batchTarget->currentBatchTracker(), init); |
| } |
| |
| void flush(GrBatchTarget* batchTarget, |
| GrDrawTarget::DrawInfo* drawInfo, |
| int instanceCount, |
| int maxInstancesPerDraw) { |
| while (instanceCount) { |
| drawInfo->setInstanceCount(SkTMin(instanceCount, maxInstancesPerDraw)); |
| drawInfo->setVertexCount(drawInfo->instanceCount() * drawInfo->verticesPerInstance()); |
| drawInfo->setIndexCount(drawInfo->instanceCount() * drawInfo->indicesPerInstance()); |
| |
| batchTarget->draw(*drawInfo); |
| |
| drawInfo->setStartVertex(drawInfo->startVertex() + drawInfo->vertexCount()); |
| instanceCount -= drawInfo->instanceCount(); |
| } |
| } |
| |
| GrColor color() const { return fBatch.fColor; } |
| const SkMatrix& viewMatrix() const { return fBatch.fViewMatrix; } |
| bool usesLocalCoords() const { return fBatch.fUsesLocalCoords; } |
| int numGlyphs() const { return fBatch.fNumGlyphs; } |
| |
| bool onCombineIfPossible(GrBatch* t) override { |
| BitmapTextBatch* that = t->cast<BitmapTextBatch>(); |
| |
| if (this->fMaskFormat != that->fMaskFormat) { |
| return false; |
| } |
| |
| if (this->fMaskFormat != kA8_GrMaskFormat && this->color() != that->color()) { |
| return false; |
| } |
| |
| if (this->usesLocalCoords() && !this->viewMatrix().cheapEqualTo(that->viewMatrix())) { |
| return false; |
| } |
| |
| fBatch.fNumGlyphs += that->numGlyphs(); |
| fGeoData.push_back_n(that->geoData()->count(), that->geoData()->begin()); |
| return true; |
| } |
| |
| struct BatchTracker { |
| GrColor fColor; |
| SkMatrix fViewMatrix; |
| bool fUsesLocalCoords; |
| bool fColorIgnored; |
| bool fCoverageIgnored; |
| int fNumGlyphs; |
| }; |
| |
| BatchTracker fBatch; |
| SkSTArray<1, Geometry, true> fGeoData; |
| GrMaskFormat fMaskFormat; |
| GrPixelConfig fPixelConfig; |
| GrBatchFontCache* fFontCache; |
| }; |
| |
| void GrBitmapTextContextB::flushSubRun(GrDrawTarget* target, BitmapTextBlob* blob, int i, |
| GrPipelineBuilder* pipelineBuilder, GrMaskFormat format, |
| GrColor color, int paintAlpha) { |
| if (0 == blob->fRuns[i].fInfos[format].fGlyphIDs.count()) { |
| return; |
| } |
| |
| if (kARGB_GrMaskFormat == format) { |
| color = SkColorSetARGB(paintAlpha, paintAlpha, paintAlpha, paintAlpha); |
| } |
| |
| BitmapTextBatch::Geometry geometry; |
| geometry.fBlob.reset(SkRef(blob)); |
| geometry.fRun = i; |
| geometry.fColor = color; |
| SkAutoTUnref<GrBatch> batch(BitmapTextBatch::Create(geometry, color, format, |
| fContext->getBatchFontCache())); |
| |
| target->drawBatch(pipelineBuilder, batch, &blob->fRuns[i].fVertexBounds); |
| } |
| |
| void GrBitmapTextContextB::flush(GrDrawTarget* target, BitmapTextBlob* blob, GrRenderTarget* rt, |
| const GrPaint& paint, const GrClip& clip, |
| const SkMatrix& viewMatrix, int paintAlpha) { |
| GrPipelineBuilder pipelineBuilder; |
| pipelineBuilder.setFromPaint(paint, rt, clip); |
| |
| GrColor color = paint.getColor(); |
| for (int i = 0; i < blob->fRuns.count(); i++) { |
| this->flushSubRun(target, blob, i, &pipelineBuilder, kA8_GrMaskFormat, color, paintAlpha); |
| this->flushSubRun(target, blob, i, &pipelineBuilder, kA565_GrMaskFormat, color, paintAlpha); |
| this->flushSubRun(target, blob, i, &pipelineBuilder, kARGB_GrMaskFormat, color, paintAlpha); |
| } |
| |
| // Now flush big glyphs |
| for (int i = 0; i < blob->fBigGlyphs.count(); i++) { |
| BitmapTextBlob::BigGlyph& bigGlyph = blob->fBigGlyphs[i]; |
| SkMatrix translate; |
| translate.setTranslate(SkIntToScalar(bigGlyph.fVx), SkIntToScalar(bigGlyph.fVy)); |
| SkPath tmpPath(bigGlyph.fPath); |
| tmpPath.transform(translate); |
| GrStrokeInfo strokeInfo(SkStrokeRec::kFill_InitStyle); |
| fContext->drawPath(rt, clip, paint, SkMatrix::I(), tmpPath, strokeInfo); |
| } |
| } |
| |
| GrBitmapTextContext::GrBitmapTextContext(GrContext* context, |
| SkGpuDevice* gpuDevice, |
| const SkDeviceProperties& properties) |
| : GrTextContext(context, gpuDevice, properties) { |
| fStrike = NULL; |
| |
| fCurrTexture = NULL; |
| fEffectTextureUniqueID = SK_InvalidUniqueID; |
| |
| fVertices = NULL; |
| fCurrVertex = 0; |
| fAllocVertexCount = 0; |
| fTotalVertexCount = 0; |
| |
| fVertexBounds.setLargestInverted(); |
| } |
| |
| GrBitmapTextContext* GrBitmapTextContext::Create(GrContext* context, |
| SkGpuDevice* gpuDevice, |
| const SkDeviceProperties& props) { |
| return SkNEW_ARGS(GrBitmapTextContext, (context, gpuDevice, props)); |
| } |
| |
| bool GrBitmapTextContext::canDraw(const GrRenderTarget* rt, |
| const GrClip& clip, |
| const GrPaint& paint, |
| const SkPaint& skPaint, |
| const SkMatrix& viewMatrix) { |
| return !SkDraw::ShouldDrawTextAsPaths(skPaint, viewMatrix); |
| } |
| |
| inline void GrBitmapTextContext::init(GrRenderTarget* rt, const GrClip& clip, |
| const GrPaint& paint, const SkPaint& skPaint, |
| const SkIRect& regionClipBounds) { |
| GrTextContext::init(rt, clip, paint, skPaint, regionClipBounds); |
| |
| fStrike = NULL; |
| |
| fCurrTexture = NULL; |
| fCurrVertex = 0; |
| |
| fVertices = NULL; |
| fAllocVertexCount = 0; |
| fTotalVertexCount = 0; |
| } |
| |
| void GrBitmapTextContext::onDrawText(GrRenderTarget* rt, const GrClip& clip, |
| const GrPaint& paint, const SkPaint& skPaint, |
| const SkMatrix& viewMatrix, |
| const char text[], size_t byteLength, |
| SkScalar x, SkScalar y, const SkIRect& regionClipBounds) { |
| SkASSERT(byteLength == 0 || text != NULL); |
| |
| // nothing to draw |
| if (text == NULL || byteLength == 0 /*|| fRC->isEmpty()*/) { |
| return; |
| } |
| |
| this->init(rt, clip, paint, skPaint, regionClipBounds); |
| |
| SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc(); |
| |
| SkAutoGlyphCache autoCache(fSkPaint, &fDeviceProperties, &viewMatrix); |
| SkGlyphCache* cache = autoCache.getCache(); |
| GrFontScaler* fontScaler = GetGrFontScaler(cache); |
| |
| // transform our starting point |
| { |
| SkPoint loc; |
| viewMatrix.mapXY(x, y, &loc); |
| x = loc.fX; |
| y = loc.fY; |
| } |
| |
| // need to measure first |
| int numGlyphs; |
| if (fSkPaint.getTextAlign() != SkPaint::kLeft_Align) { |
| SkVector stopVector; |
| numGlyphs = MeasureText(cache, glyphCacheProc, text, byteLength, &stopVector); |
| |
| SkScalar stopX = stopVector.fX; |
| SkScalar stopY = stopVector.fY; |
| |
| if (fSkPaint.getTextAlign() == SkPaint::kCenter_Align) { |
| stopX = SkScalarHalf(stopX); |
| stopY = SkScalarHalf(stopY); |
| } |
| x -= stopX; |
| y -= stopY; |
| } else { |
| numGlyphs = fSkPaint.textToGlyphs(text, byteLength, NULL); |
| } |
| fTotalVertexCount = kVerticesPerGlyph*numGlyphs; |
| |
| const char* stop = text + byteLength; |
| |
| SkAutoKern autokern; |
| |
| SkFixed fxMask = ~0; |
| SkFixed fyMask = ~0; |
| SkScalar halfSampleX, halfSampleY; |
| if (cache->isSubpixel()) { |
| halfSampleX = halfSampleY = SkFixedToScalar(SkGlyph::kSubpixelRound); |
| SkAxisAlignment baseline = SkComputeAxisAlignmentForHText(viewMatrix); |
| if (kX_SkAxisAlignment == baseline) { |
| fyMask = 0; |
| halfSampleY = SK_ScalarHalf; |
| } else if (kY_SkAxisAlignment == baseline) { |
| fxMask = 0; |
| halfSampleX = SK_ScalarHalf; |
| } |
| } else { |
| halfSampleX = halfSampleY = SK_ScalarHalf; |
| } |
| |
| Sk48Dot16 fx = SkScalarTo48Dot16(x + halfSampleX); |
| Sk48Dot16 fy = SkScalarTo48Dot16(y + halfSampleY); |
| |
| // if we have RGB, then we won't have any SkShaders so no need to use a localmatrix, but for |
| // performance reasons we just invert here instead |
| if (!viewMatrix.invert(&fLocalMatrix)) { |
| SkDebugf("Cannot invert viewmatrix\n"); |
| return; |
| } |
| |
| while (text < stop) { |
| const SkGlyph& glyph = glyphCacheProc(cache, &text, fx & fxMask, fy & fyMask); |
| |
| fx += autokern.adjust(glyph); |
| |
| if (glyph.fWidth) { |
| this->appendGlyph(GrGlyph::Pack(glyph.getGlyphID(), |
| glyph.getSubXFixed(), |
| glyph.getSubYFixed(), |
| GrGlyph::kCoverage_MaskStyle), |
| Sk48Dot16FloorToInt(fx), |
| Sk48Dot16FloorToInt(fy), |
| fontScaler); |
| } |
| |
| fx += glyph.fAdvanceX; |
| fy += glyph.fAdvanceY; |
| } |
| |
| this->finish(); |
| } |
| |
| void GrBitmapTextContext::onDrawPosText(GrRenderTarget* rt, const GrClip& clip, |
| const GrPaint& paint, const SkPaint& skPaint, |
| const SkMatrix& viewMatrix, |
| const char text[], size_t byteLength, |
| const SkScalar pos[], int scalarsPerPosition, |
| const SkPoint& offset, const SkIRect& regionClipBounds) { |
| SkASSERT(byteLength == 0 || text != NULL); |
| SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition); |
| |
| // nothing to draw |
| if (text == NULL || byteLength == 0/* || fRC->isEmpty()*/) { |
| return; |
| } |
| |
| this->init(rt, clip, paint, skPaint, regionClipBounds); |
| |
| SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc(); |
| |
| SkAutoGlyphCache autoCache(fSkPaint, &fDeviceProperties, &viewMatrix); |
| SkGlyphCache* cache = autoCache.getCache(); |
| GrFontScaler* fontScaler = GetGrFontScaler(cache); |
| |
| // if we have RGB, then we won't have any SkShaders so no need to use a localmatrix, but for |
| // performance reasons we just invert here instead |
| if (!viewMatrix.invert(&fLocalMatrix)) { |
| SkDebugf("Cannot invert viewmatrix\n"); |
| return; |
| } |
| |
| int numGlyphs = fSkPaint.textToGlyphs(text, byteLength, NULL); |
| fTotalVertexCount = kVerticesPerGlyph*numGlyphs; |
| |
| const char* stop = text + byteLength; |
| SkTextAlignProc alignProc(fSkPaint.getTextAlign()); |
| SkTextMapStateProc tmsProc(viewMatrix, offset, scalarsPerPosition); |
| SkScalar halfSampleX = 0, halfSampleY = 0; |
| |
| if (cache->isSubpixel()) { |
| // maybe we should skip the rounding if linearText is set |
| SkAxisAlignment baseline = SkComputeAxisAlignmentForHText(viewMatrix); |
| |
| SkFixed fxMask = ~0; |
| SkFixed fyMask = ~0; |
| if (kX_SkAxisAlignment == baseline) { |
| fyMask = 0; |
| halfSampleY = SK_ScalarHalf; |
| } else if (kY_SkAxisAlignment == baseline) { |
| fxMask = 0; |
| halfSampleX = SK_ScalarHalf; |
| } |
| |
| if (SkPaint::kLeft_Align == fSkPaint.getTextAlign()) { |
| while (text < stop) { |
| SkPoint tmsLoc; |
| tmsProc(pos, &tmsLoc); |
| Sk48Dot16 fx = SkScalarTo48Dot16(tmsLoc.fX + halfSampleX); |
| Sk48Dot16 fy = SkScalarTo48Dot16(tmsLoc.fY + halfSampleY); |
| |
| const SkGlyph& glyph = glyphCacheProc(cache, &text, |
| fx & fxMask, fy & fyMask); |
| |
| if (glyph.fWidth) { |
| this->appendGlyph(GrGlyph::Pack(glyph.getGlyphID(), |
| glyph.getSubXFixed(), |
| glyph.getSubYFixed(), |
| GrGlyph::kCoverage_MaskStyle), |
| Sk48Dot16FloorToInt(fx), |
| Sk48Dot16FloorToInt(fy), |
| fontScaler); |
| } |
| pos += scalarsPerPosition; |
| } |
| } else { |
| while (text < stop) { |
| const char* currentText = text; |
| const SkGlyph& metricGlyph = glyphCacheProc(cache, &text, 0, 0); |
| |
| if (metricGlyph.fWidth) { |
| SkDEBUGCODE(SkFixed prevAdvX = metricGlyph.fAdvanceX;) |
| SkDEBUGCODE(SkFixed prevAdvY = metricGlyph.fAdvanceY;) |
| SkPoint tmsLoc; |
| tmsProc(pos, &tmsLoc); |
| SkPoint alignLoc; |
| alignProc(tmsLoc, metricGlyph, &alignLoc); |
| |
| Sk48Dot16 fx = SkScalarTo48Dot16(alignLoc.fX + halfSampleX); |
| Sk48Dot16 fy = SkScalarTo48Dot16(alignLoc.fY + halfSampleY); |
| |
| // have to call again, now that we've been "aligned" |
| const SkGlyph& glyph = glyphCacheProc(cache, ¤tText, |
| fx & fxMask, fy & fyMask); |
| // the assumption is that the metrics haven't changed |
| SkASSERT(prevAdvX == glyph.fAdvanceX); |
| SkASSERT(prevAdvY == glyph.fAdvanceY); |
| SkASSERT(glyph.fWidth); |
| |
| this->appendGlyph(GrGlyph::Pack(glyph.getGlyphID(), |
| glyph.getSubXFixed(), |
| glyph.getSubYFixed(), |
| GrGlyph::kCoverage_MaskStyle), |
| Sk48Dot16FloorToInt(fx), |
| Sk48Dot16FloorToInt(fy), |
| fontScaler); |
| } |
| pos += scalarsPerPosition; |
| } |
| } |
| } else { // not subpixel |
| |
| if (SkPaint::kLeft_Align == fSkPaint.getTextAlign()) { |
| while (text < stop) { |
| // the last 2 parameters are ignored |
| const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0); |
| |
| if (glyph.fWidth) { |
| SkPoint tmsLoc; |
| tmsProc(pos, &tmsLoc); |
| |
| Sk48Dot16 fx = SkScalarTo48Dot16(tmsLoc.fX + SK_ScalarHalf); //halfSampleX; |
| Sk48Dot16 fy = SkScalarTo48Dot16(tmsLoc.fY + SK_ScalarHalf); //halfSampleY; |
| this->appendGlyph(GrGlyph::Pack(glyph.getGlyphID(), |
| glyph.getSubXFixed(), |
| glyph.getSubYFixed(), |
| GrGlyph::kCoverage_MaskStyle), |
| Sk48Dot16FloorToInt(fx), |
| Sk48Dot16FloorToInt(fy), |
| fontScaler); |
| } |
| pos += scalarsPerPosition; |
| } |
| } else { |
| while (text < stop) { |
| // the last 2 parameters are ignored |
| const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0); |
| |
| if (glyph.fWidth) { |
| SkPoint tmsLoc; |
| tmsProc(pos, &tmsLoc); |
| |
| SkPoint alignLoc; |
| alignProc(tmsLoc, glyph, &alignLoc); |
| |
| Sk48Dot16 fx = SkScalarTo48Dot16(alignLoc.fX + SK_ScalarHalf); //halfSampleX; |
| Sk48Dot16 fy = SkScalarTo48Dot16(alignLoc.fY + SK_ScalarHalf); //halfSampleY; |
| this->appendGlyph(GrGlyph::Pack(glyph.getGlyphID(), |
| glyph.getSubXFixed(), |
| glyph.getSubYFixed(), |
| GrGlyph::kCoverage_MaskStyle), |
| Sk48Dot16FloorToInt(fx), |
| Sk48Dot16FloorToInt(fy), |
| fontScaler); |
| } |
| pos += scalarsPerPosition; |
| } |
| } |
| } |
| |
| this->finish(); |
| } |
| |
| static void* alloc_vertices(GrDrawTarget* drawTarget, |
| int numVertices, |
| GrMaskFormat maskFormat) { |
| if (numVertices <= 0) { |
| return NULL; |
| } |
| |
| // set up attributes |
| void* vertices = NULL; |
| bool success = drawTarget->reserveVertexAndIndexSpace(numVertices, |
| get_vertex_stride(maskFormat), |
| 0, |
| &vertices, |
| NULL); |
| GrAlwaysAssert(success); |
| return vertices; |
| } |
| |
| inline bool GrBitmapTextContext::uploadGlyph(GrGlyph* glyph, GrFontScaler* scaler) { |
| if (!fStrike->glyphTooLargeForAtlas(glyph)) { |
| if (fStrike->addGlyphToAtlas(glyph, scaler)) { |
| return true; |
| } |
| |
| // try to clear out an unused plot before we flush |
| if (fContext->getFontCache()->freeUnusedPlot(fStrike, glyph) && |
| fStrike->addGlyphToAtlas(glyph, scaler)) { |
| return true; |
| } |
| |
| if (c_DumpFontCache) { |
| #ifdef SK_DEVELOPER |
| fContext->getFontCache()->dump(); |
| #endif |
| } |
| |
| // before we purge the cache, we must flush any accumulated draws |
| this->flush(); |
| fContext->flush(); |
| |
| // we should have an unused plot now |
| if (fContext->getFontCache()->freeUnusedPlot(fStrike, glyph) && |
| fStrike->addGlyphToAtlas(glyph, scaler)) { |
| return true; |
| } |
| |
| // we should never get here |
| SkASSERT(false); |
| } |
| |
| return false; |
| } |
| |
| void GrBitmapTextContext::appendGlyph(GrGlyph::PackedID packed, |
| int vx, int vy, |
| GrFontScaler* scaler) { |
| if (NULL == fDrawTarget) { |
| return; |
| } |
| |
| if (NULL == fStrike) { |
| fStrike = fContext->getFontCache()->getStrike(scaler); |
| } |
| |
| GrGlyph* glyph = fStrike->getGlyph(packed, scaler); |
| if (NULL == glyph || glyph->fBounds.isEmpty()) { |
| return; |
| } |
| |
| int x = vx + glyph->fBounds.fLeft; |
| int y = vy + glyph->fBounds.fTop; |
| |
| // keep them as ints until we've done the clip-test |
| int width = glyph->fBounds.width(); |
| int height = glyph->fBounds.height(); |
| |
| // check if we clipped out |
| if (fClipRect.quickReject(x, y, x + width, y + height)) { |
| return; |
| } |
| |
| // If the glyph is too large we fall back to paths |
| if (NULL == glyph->fPlot && !uploadGlyph(glyph, scaler)) { |
| if (NULL == glyph->fPath) { |
| SkPath* path = SkNEW(SkPath); |
| if (!scaler->getGlyphPath(glyph->glyphID(), path)) { |
| // flag the glyph as being dead? |
| delete path; |
| return; |
| } |
| glyph->fPath = path; |
| } |
| |
| // flush any accumulated draws before drawing this glyph as a path. |
| this->flush(); |
| |
| SkMatrix translate; |
| translate.setTranslate(SkIntToScalar(vx), SkIntToScalar(vy)); |
| SkPath tmpPath(*glyph->fPath); |
| tmpPath.transform(translate); |
| GrStrokeInfo strokeInfo(SkStrokeRec::kFill_InitStyle); |
| fContext->drawPath(fRenderTarget, fClip, fPaint, SkMatrix::I(), tmpPath, strokeInfo); |
| |
| // remove this glyph from the vertices we need to allocate |
| fTotalVertexCount -= kVerticesPerGlyph; |
| return; |
| } |
| |
| SkASSERT(glyph->fPlot); |
| GrDrawTarget::DrawToken drawToken = fDrawTarget->getCurrentDrawToken(); |
| glyph->fPlot->setDrawToken(drawToken); |
| |
| // the current texture/maskformat must match what the glyph needs |
| GrTexture* texture = glyph->fPlot->texture(); |
| SkASSERT(texture); |
| |
| if (fCurrTexture != texture || fCurrVertex + kVerticesPerGlyph > fAllocVertexCount) { |
| this->flush(); |
| fCurrTexture = texture; |
| fCurrTexture->ref(); |
| fCurrMaskFormat = glyph->fMaskFormat; |
| } |
| |
| if (NULL == fVertices) { |
| int maxQuadVertices = kVerticesPerGlyph * fContext->getQuadIndexBuffer()->maxQuads(); |
| fAllocVertexCount = SkMin32(fTotalVertexCount, maxQuadVertices); |
| fVertices = alloc_vertices(fDrawTarget, fAllocVertexCount, fCurrMaskFormat); |
| } |
| |
| SkRect r; |
| r.fLeft = SkIntToScalar(x); |
| r.fTop = SkIntToScalar(y); |
| r.fRight = r.fLeft + SkIntToScalar(width); |
| r.fBottom = r.fTop + SkIntToScalar(height); |
| |
| fVertexBounds.joinNonEmptyArg(r); |
| |
| int u0 = glyph->fAtlasLocation.fX; |
| int v0 = glyph->fAtlasLocation.fY; |
| int u1 = u0 + width; |
| int v1 = v0 + height; |
| |
| size_t vertSize = get_vertex_stride(fCurrMaskFormat); |
| intptr_t vertex = reinterpret_cast<intptr_t>(fVertices) + vertSize * fCurrVertex; |
| |
| // V0 |
| SkPoint* position = reinterpret_cast<SkPoint*>(vertex); |
| position->set(r.fLeft, r.fTop); |
| if (kA8_GrMaskFormat == fCurrMaskFormat) { |
| SkColor* color = reinterpret_cast<SkColor*>(vertex + sizeof(SkPoint)); |
| *color = fPaint.getColor(); |
| } |
| SkIPoint16* textureCoords = reinterpret_cast<SkIPoint16*>(vertex + vertSize - |
| sizeof(SkIPoint16)); |
| textureCoords->set(u0, v0); |
| vertex += vertSize; |
| |
| // V1 |
| position = reinterpret_cast<SkPoint*>(vertex); |
| position->set(r.fLeft, r.fBottom); |
| if (kA8_GrMaskFormat == fCurrMaskFormat) { |
| SkColor* color = reinterpret_cast<SkColor*>(vertex + sizeof(SkPoint)); |
| *color = fPaint.getColor(); |
| } |
| textureCoords = reinterpret_cast<SkIPoint16*>(vertex + vertSize - sizeof(SkIPoint16)); |
| textureCoords->set(u0, v1); |
| vertex += vertSize; |
| |
| // V2 |
| position = reinterpret_cast<SkPoint*>(vertex); |
| position->set(r.fRight, r.fBottom); |
| if (kA8_GrMaskFormat == fCurrMaskFormat) { |
| SkColor* color = reinterpret_cast<SkColor*>(vertex + sizeof(SkPoint)); |
| *color = fPaint.getColor(); |
| } |
| textureCoords = reinterpret_cast<SkIPoint16*>(vertex + vertSize - sizeof(SkIPoint16)); |
| textureCoords->set(u1, v1); |
| vertex += vertSize; |
| |
| // V3 |
| position = reinterpret_cast<SkPoint*>(vertex); |
| position->set(r.fRight, r.fTop); |
| if (kA8_GrMaskFormat == fCurrMaskFormat) { |
| SkColor* color = reinterpret_cast<SkColor*>(vertex + sizeof(SkPoint)); |
| *color = fPaint.getColor(); |
| } |
| textureCoords = reinterpret_cast<SkIPoint16*>(vertex + vertSize - sizeof(SkIPoint16)); |
| textureCoords->set(u1, v0); |
| |
| fCurrVertex += 4; |
| } |
| |
| void GrBitmapTextContext::flush() { |
| if (NULL == fDrawTarget) { |
| return; |
| } |
| |
| if (fCurrVertex > 0) { |
| GrPipelineBuilder pipelineBuilder; |
| pipelineBuilder.setFromPaint(fPaint, fRenderTarget, fClip); |
| |
| // setup our sampler state for our text texture/atlas |
| SkASSERT(SkIsAlign4(fCurrVertex)); |
| SkASSERT(fCurrTexture); |
| |
| SkASSERT(fStrike); |
| GrColor color = fPaint.getColor(); |
| switch (fCurrMaskFormat) { |
| // Color bitmap text |
| case kARGB_GrMaskFormat: { |
| int a = fSkPaint.getAlpha(); |
| color = SkColorSetARGB(a, a, a, a); |
| break; |
| } |
| // LCD text |
| case kA565_GrMaskFormat: { |
| // TODO: move supportsRGBCoverage check to setupCoverageEffect and only add LCD |
| // processor if the xp can support it. For now we will simply assume that if |
| // fUseLCDText is true, then we have a known color output. |
| const GrXPFactory* xpFactory = pipelineBuilder.getXPFactory(); |
| if (!xpFactory->supportsRGBCoverage(0, kRGBA_GrColorComponentFlags)) { |
| SkDebugf("LCD Text will not draw correctly.\n"); |
| } |
| break; |
| } |
| // Grayscale/BW text |
| case kA8_GrMaskFormat: |
| break; |
| default: |
| SkFAIL("Unexpected mask format."); |
| } |
| |
| GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kNone_FilterMode); |
| uint32_t textureUniqueID = fCurrTexture->getUniqueID(); |
| if (textureUniqueID != fEffectTextureUniqueID || |
| fCachedGeometryProcessor->color() != color || |
| !fCachedGeometryProcessor->localMatrix().cheapEqualTo(fLocalMatrix)) { |
| // This will be ignored in the non A8 case |
| bool opaqueVertexColors = GrColorIsOpaque(fPaint.getColor()); |
| fCachedGeometryProcessor.reset(GrBitmapTextGeoProc::Create(color, |
| fCurrTexture, |
| params, |
| fCurrMaskFormat, |
| opaqueVertexColors, |
| fLocalMatrix)); |
| fEffectTextureUniqueID = textureUniqueID; |
| } |
| |
| int nGlyphs = fCurrVertex / kVerticesPerGlyph; |
| fDrawTarget->setIndexSourceToBuffer(fContext->getQuadIndexBuffer()); |
| fDrawTarget->drawIndexedInstances(&pipelineBuilder, |
| fCachedGeometryProcessor.get(), |
| kTriangles_GrPrimitiveType, |
| nGlyphs, |
| kVerticesPerGlyph, |
| kIndicesPerGlyph, |
| &fVertexBounds); |
| |
| fDrawTarget->resetVertexSource(); |
| fVertices = NULL; |
| fAllocVertexCount = 0; |
| // reset to be those that are left |
| fTotalVertexCount -= fCurrVertex; |
| fCurrVertex = 0; |
| fVertexBounds.setLargestInverted(); |
| SkSafeSetNull(fCurrTexture); |
| } |
| } |
| |
| inline void GrBitmapTextContext::finish() { |
| this->flush(); |
| fTotalVertexCount = 0; |
| |
| GrTextContext::finish(); |
| } |
