BitmapTextBatch and BitmapTextBlob

src/gpu/GrBitmapTextContext.cpp

Index: src/gpu/GrBitmapTextContext.cpp
diff --git a/src/gpu/GrBitmapTextContext.cpp b/src/gpu/GrBitmapTextContext.cpp
index 4061c4882137e9888ff697a20c171284512501bc..7518a7d381aa46ba46dcaa05aec1ae175bfc7e98 100755
--- a/src/gpu/GrBitmapTextContext.cpp
+++ b/src/gpu/GrBitmapTextContext.cpp
@@ -4,9 +4,12 @@
  * 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"
@@ -18,6 +21,7 @@
 #include "SkAutoKern.h"
 #include "SkColorPriv.h"
 #include "SkDraw.h"
+#include "SkDrawFilter.h"
 #include "SkDrawProcs.h"
 #include "SkGlyphCache.h"
 #include "SkGpuDevice.h"
@@ -25,6 +29,7 @@
 #include "SkPath.h"
 #include "SkRTConf.h"
 #include "SkStrokeRec.h"
+#include "SkTextBlob.h"
 #include "SkTextMapStateProc.h"
 
 #include "effects/GrBitmapTextGeoProc.h"
@@ -45,6 +50,940 @@ static const int kVerticesPerGlyph = 4;
 static const int kIndicesPerGlyph = 6;
 };
 
+// TODO
+// More tests
+// move to SkCache
+
+GrBitmapTextContextB::GrBitmapTextContextB(GrContext* context,
+                                         SkGpuDevice* gpuDevice,
+                                         const SkDeviceProperties& properties)
+                                       : INHERITED(context, gpuDevice, properties) {
+    fStrike = 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 SkPaint& paint, const SkMatrix& viewMatrix) {
+    return !SkDraw::ShouldDrawTextAsPaths(paint, 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);
+
+    fStrike = 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::onDrawTextBlob(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());
+
+    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, rt, clip, skPaint, viewMatrix, blob, x, y,
+                                     drawFilter, clipBounds);
+        }
+
+        // TODO is this right?
+        GrPaint grPaint;
+        SkPaint2GrPaintShader(fContext, fRenderTarget, skPaint, viewMatrix, true, &grPaint);
+        INHERITED::init(rt, clip, grPaint, skPaint, clipBounds);
+    } else {
+        cacheBlob = SkNEW(BitmapTextBlob);
+        fCache.set(blob->uniqueID(), cacheBlob);
+        this->regenerateTextBlob(cacheBlob, rt, clip, skPaint, viewMatrix, blob, x, y,
+                                 drawFilter, clipBounds);
+    }
+
+    this->finish(cacheBlob);
+}
+
+void GrBitmapTextContextB::regenerateTextBlob(BitmapTextBlob* cacheBlob,
+                                              GrRenderTarget* rt,
+                                              const GrClip& clip,
+                                              const SkPaint& skPaint, const SkMatrix& viewMatrix,
+                                              const SkTextBlob* blob, SkScalar x, SkScalar y,
+                                              SkDrawFilter* drawFilter, const SkIRect& clipBounds) {
+    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));
+
+        GrPaint grPaint;
+        SkPaint2GrPaintShader(fContext, fRenderTarget, runPaint, viewMatrix, true, &grPaint);
+
+        switch (it.positioning()) {
+            case SkTextBlob::kDefault_Positioning:
+                this->internalDrawText(cacheBlob, run, rt, clip, grPaint, runPaint, viewMatrix,
+                                       (const char *)it.glyphs(), textLen,
+                                       x + offset.x(), y + offset.y(), clipBounds);
+                break;
+            case SkTextBlob::kHorizontal_Positioning:
+                this->internalDrawPosText(cacheBlob, run, rt, clip, grPaint, runPaint, viewMatrix,
+                                          (const char*)it.glyphs(), textLen, it.pos(), 1,
+                                          SkPoint::Make(x, y + offset.y()), clipBounds);
+                break;
+            case SkTextBlob::kFull_Positioning:
+                this->internalDrawPosText(cacheBlob, run, rt, clip, grPaint, runPaint, viewMatrix,
+                                          (const char*)it.glyphs(), textLen, it.pos(), 2,
+                                          SkPoint::Make(x, y), clipBounds);
+                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();
+    this->internalDrawText(blob, 0, rt, clip, paint, skPaint, viewMatrix, text, byteLength, x, y,
+                           regionClipBounds);
+
+    this->finish(blob);
+}
+
+void GrBitmapTextContextB::internalDrawText(BitmapTextBlob* blob, int runIndex, 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) {
+        return;
+    }
+
+    this->init(rt, clip, paint, skPaint, regionClipBounds);
+
+    SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc();
+
+    // Get GrFontScaler from cache
+    BitmapTextBlob::Run& run = blob->fRuns[runIndex];
+    run.fDescriptor.reset(fSkPaint.getScalerContextDescriptor(&fDeviceProperties, &viewMatrix,
+                                                              false));
+    run.fTypeface.reset(SkSafeRef(fSkPaint.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 (fSkPaint.getTextAlign() != SkPaint::kLeft_Align) {
+        SkVector    stopVector;
+        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;
+    }
+
+    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);
+        }
+
+        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;
+    this->internalDrawPosText(blob, 0, rt, clip, paint, skPaint, viewMatrix, text, byteLength, pos,
+                              scalarsPerPosition, offset, regionClipBounds);
+    this->finish(blob);
+}
+
+void GrBitmapTextContextB::internalDrawPosText(BitmapTextBlob* blob, int runIndex,
+                                               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) {
+        return;
+    }
+
+    this->init(rt, clip, paint, skPaint, regionClipBounds);
+
+    SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc();
+
+    // Get GrFontScaler from cache
+    BitmapTextBlob::Run& run = blob->fRuns[runIndex];
+    run.fDescriptor.reset(fSkPaint.getScalerContextDescriptor(&fDeviceProperties, &viewMatrix,
+                                                              false));
+    run.fTypeface.reset(SkSafeRef(fSkPaint.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(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(blob,
+                                      runIndex,
+                                      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, &currentText,
+                                                          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);
+                }
+                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(blob,
+                                      runIndex,
+                                      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(blob,
+                                      runIndex,
+                                      GrGlyph::Pack(glyph.getGlyphID(),
+                                                    glyph.getSubXFixed(),
+                                                    glyph.getSubYFixed(),
+                                                    GrGlyph::kCoverage_MaskStyle),
+                                      Sk48Dot16FloorToInt(fx),
+                                      Sk48Dot16FloorToInt(fy),
+                                      fontScaler);
+                }
+                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) {
+    if (NULL == fStrike) {
+        fStrike = fContext->getBatchFontCache()->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 (fStrike->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(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::TextInfo 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 SK_OVERRIDE { return "BitmapTextBatch"; }
+
+    void getInvariantOutputColor(GrInitInvariantOutput* out) const SK_OVERRIDE {
+        if (kARGB_GrMaskFormat == fMaskFormat) {
+            out->setUnknownFourComponents();
+        } else {
+            out->setKnownFourComponents(fBatch.fColor);
+        }
+    }
+
+    void getInvariantOutputCoverage(GrInitInvariantOutput* out) const SK_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) SK_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) SK_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

[bsalomon, 2015/03/24 16:27:53]

Is that not captured in this->usesLocalCoords()? If not, maybe we should figure
out how to capture it there? Hopefully that reflects whether any of the batch
trackers were seeded with a pipeline info that indicated local coords were
necessary.

[joshualitt, 2015/03/25 14:13:37]

You are correct about this->usesLocalCoords().  The problem is we should remove
shader stages when we have rgba text, but we currently don't do this.

[bsalomon, 2015/03/25 14:19:15]

You mean if there is a SkShader we will add a corresponding GrFP to the
GrPaint/GrPB?

[joshualitt, 2015/03/26 18:21:43]

correct

+        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];
+
+            uint32_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->refGlyph(glyph, batchTarget->currentToken());
+
+                        this->regenerateTextureCoords(glyph, (void*)info.fVertices.begin(),
+                                                      vertexStride, glyphIdx * kVerticesPerGlyph);
+                    }
+
+                    if (regenerateColors) {
+                        this->regenerateColors((void*)info.fVertices.begin(), vertexStride,
+                                               glyphIdx * kVerticesPerGlyph, 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, void* vertices, size_t vertexStride,
+                                 int currVertex) {
+        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;
+
+        intptr_t vertex = reinterpret_cast<intptr_t>(vertices) + vertexStride * currVertex;
+
+        // we assume texture coords are the last vertex attribute, this is a bit fragile.

[bsalomon, 2015/03/24 16:27:53]

why not just make the incoming ptr (vertices) already be offset to point to the
first texture coords? Then you know the next one is at vertices+vertexStride,
and then vertices+2*vertexStride,...  If you do that, should rename the params
to texCoords and texCoordsStride, or something along those lines. I think it'd
simplify the ptr math in here a bit.

[joshualitt, 2015/03/25 14:13:37]

Acknowledged.

+        // TODO pass in this offset or something
+        SkIPoint16* textureCoords;
+        // V0
+        textureCoords = reinterpret_cast<SkIPoint16*>(vertex + vertexStride - sizeof(SkIPoint16));
+        textureCoords->set(u0, v0);
+        vertex += vertexStride;
+
+        // V1
+        textureCoords = reinterpret_cast<SkIPoint16*>(vertex + vertexStride - sizeof(SkIPoint16));
+        textureCoords->set(u0, v1);
+        vertex += vertexStride;
+
+        // V2
+        textureCoords = reinterpret_cast<SkIPoint16*>(vertex + vertexStride - sizeof(SkIPoint16));
+        textureCoords->set(u1, v1);
+        vertex += vertexStride;
+
+        // V3
+        textureCoords = reinterpret_cast<SkIPoint16*>(vertex + vertexStride - sizeof(SkIPoint16));
+        textureCoords->set(u1, v0);
+    }
+
+    void regenerateColors(void* vertices, size_t vertexStride,
+                          int currVertex, GrColor color) {
+        intptr_t vertex = reinterpret_cast<intptr_t>(vertices) + vertexStride * currVertex;

[bsalomon, 2015/03/24 16:27:53]

same... just take a ptr to the first vertex color... then this never has to
change no matter how you rearrange the attrs.

[joshualitt, 2015/03/25 14:13:37]

Acknowledged.

+
+        for (int i = 0; i < kVerticesPerGlyph; i++) {
+            SkColor* vcolor = reinterpret_cast<SkColor*>(vertex + sizeof(SkPoint));
+            *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) SK_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::flush(BitmapTextBlob* blob, int i, GrPipelineBuilder* pipelineBuilder,
+                                GrMaskFormat format) {
+    if (0 == blob->fRuns[i].fInfos[format].fGlyphIDs.count()) {
+        return;
+    }
+
+    GrColor color = fPaint.getColor();
+    if (kARGB_GrMaskFormat == format) {
+        int a = fSkPaint.getAlpha();
+        color = SkColorSetARGB(a, a, a, a);
+    } else if (kA565_GrMaskFormat == format) {
+        // 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");
+        }
+    }
+
+    BitmapTextBatch::Geometry geometry;
+    geometry.fBlob.reset(SkRef(blob));
+    geometry.fRun = i;
+    geometry.fColor = color;
+    SkAutoTUnref<GrBatch> batch(BitmapTextBatch::Create(geometry, color, format,
+                                                        fContext->getBatchFontCache()));
+
+    fDrawTarget->drawBatch(pipelineBuilder, batch, &blob->fRuns[i].fVertexBounds);
+}
+
+void GrBitmapTextContextB::flush(BitmapTextBlob* blob) {
+    GrPipelineBuilder pipelineBuilder;
+    pipelineBuilder.setFromPaint(fPaint, fRenderTarget, fClip);
+
+    for (int i = 0; i < blob->fRuns.count(); i++) {
+        this->flush(blob, i, &pipelineBuilder, kA8_GrMaskFormat);
+        this->flush(blob, i, &pipelineBuilder, kA565_GrMaskFormat);
+        this->flush(blob, i, &pipelineBuilder, kARGB_GrMaskFormat);
+    }
+
+    // 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(fRenderTarget, fClip, fPaint, SkMatrix::I(), tmpPath, strokeInfo);
+    }
+}
+
+inline void GrBitmapTextContextB::finish(BitmapTextBlob* blob) {
+    this->flush(blob);
+
+    INHERITED::finish();
+}
+
 GrBitmapTextContext::GrBitmapTextContext(GrContext* context,
                                          SkGpuDevice* gpuDevice,
                                          const SkDeviceProperties& properties)
@@ -348,17 +1287,6 @@ void GrBitmapTextContext::onDrawPosText(GrRenderTarget* rt, const GrClip& clip,
     this->finish();
 }
 
-static size_t get_vertex_stride(GrMaskFormat maskFormat) {
-    switch (maskFormat) {
-        case kA8_GrMaskFormat:
-            return kGrayTextVASize;
-        case kARGB_GrMaskFormat:
-            return kColorTextVASize;
-        default:
-            return kLCDTextVASize;
-    }
-}
-
 static void* alloc_vertices(GrDrawTarget* drawTarget,
                             int numVertices,
                             GrMaskFormat maskFormat) {
@@ -382,33 +1310,33 @@ inline bool GrBitmapTextContext::uploadGlyph(GrGlyph* glyph, GrFontScaler* scale
         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;
 }
 
@@ -634,4 +1562,3 @@ inline void GrBitmapTextContext::finish() {
 
     GrTextContext::finish();
 }
-