Start whittling down GrTextContext

src/gpu/text/GrTextContext.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTextContext.h"
-#include "GrContext.h"
 #include "GrFontScaler.h"
-#include "GrTextUtils.h"
 
-#include "SkDrawFilter.h"
 #include "SkGlyphCache.h"
-#include "SkGrPriv.h"
-#include "SkTextBlobRunIterator.h"
 
 GrTextContext::GrTextContext(GrContext* context, const SkSurfaceProps& surfaceProps)
-    : fFallbackTextContext(nullptr)
-    , fContext(context)
+    : fContext(context)
     , fSurfaceProps(surfaceProps) {
 }
 
-GrTextContext::~GrTextContext() {
-    delete fFallbackTextContext;
-}
-
-void GrTextContext::drawText(GrDrawContext* dc,
-                             const GrClip& clip, const GrPaint& paint,
-                             const SkPaint& skPaint, const SkMatrix& viewMatrix,
-                             const char text[], size_t byteLength,
-                             SkScalar x, SkScalar y, const SkIRect& clipBounds) {
-    if (fContext->abandoned()) {
-        return;
-    }
-
-    GrTextContext* textContext = this;
-    do {
-        if (textContext->canDraw(skPaint, viewMatrix)) {
-            textContext->onDrawText(dc, clip, paint, skPaint, viewMatrix,
-                                    text, byteLength, x, y, clipBounds);
-            return;
-        }
-        textContext = textContext->fFallbackTextContext;
-    } while (textContext);
-
-    // fall back to drawing as a path
-    GrTextUtils::DrawTextAsPath(fContext, dc, clip, skPaint, viewMatrix, text, byteLength, x, y,
-                                clipBounds);
-}
-
-void GrTextContext::drawPosText(GrDrawContext* dc,
-                                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& clipBounds) {
-    if (fContext->abandoned()) {
-        return;
-    }
-
-    GrTextContext* textContext = this;
-    do {
-        if (textContext->canDraw(skPaint, viewMatrix)) {
-            textContext->onDrawPosText(dc, clip, paint, skPaint, viewMatrix,
-                                       text, byteLength, pos,
-                                       scalarsPerPosition, offset, clipBounds);
-            return;
-        }
-        textContext = textContext->fFallbackTextContext;
-    } while (textContext);
-
-    // fall back to drawing as a path
-    GrTextUtils::DrawPosTextAsPath(fContext, dc, fSurfaceProps, clip, skPaint, viewMatrix, text,
-                                   byteLength, pos, scalarsPerPosition, offset, clipBounds);
-}
-
 bool GrTextContext::ShouldDisableLCD(const SkPaint& paint) {
     if (!SkXfermode::AsMode(paint.getXfermode(), nullptr) ||
         paint.getMaskFilter() ||
         paint.getRasterizer() ||
         paint.getPathEffect() ||
         paint.isFakeBoldText() ||
         paint.getStyle() != SkPaint::kFill_Style)
     {
         return true;
     }
     return false;
 }
 
 uint32_t GrTextContext::FilterTextFlags(const SkSurfaceProps& surfaceProps, const SkPaint& paint) {
     uint32_t flags = paint.getFlags();
 
     if (!paint.isLCDRenderText() || !paint.isAntiAlias()) {
         return flags;
     }
 
     if (kUnknown_SkPixelGeometry == surfaceProps.pixelGeometry() || ShouldDisableLCD(paint)) {
         flags &= ~SkPaint::kLCDRenderText_Flag;
         flags |= SkPaint::kGenA8FromLCD_Flag;
     }
 
     return flags;
 }
 
-void GrTextContext::drawTextBlob(GrDrawContext* dc,
-                                 const GrClip& clip, const SkPaint& skPaint,
-                                 const SkMatrix& viewMatrix, const SkTextBlob* blob,
-                                 SkScalar x, SkScalar y,
-                                 SkDrawFilter* drawFilter, const SkIRect& clipBounds) {
-    SkPaint runPaint = skPaint;
-
-    SkTextBlobRunIterator it(blob);
-    for (;!it.done(); it.next()) {
-        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(FilterTextFlags(fSurfaceProps, runPaint));
-
-        GrPaint grPaint;
-        if (!SkPaintToGrPaint(fContext, runPaint, viewMatrix, &grPaint)) {
-            return;
-        }
-
-        switch (it.positioning()) {
-        case SkTextBlob::kDefault_Positioning:
-            this->drawText(dc, clip, grPaint, runPaint, viewMatrix, (const char *)it.glyphs(),
-                           textLen, x + offset.x(), y + offset.y(), clipBounds);
-            break;
-        case SkTextBlob::kHorizontal_Positioning:
-            this->drawPosText(dc, 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->drawPosText(dc, clip, grPaint, runPaint, viewMatrix, (const char*)it.glyphs(),
-                              textLen, it.pos(), 2, SkPoint::Make(x, y), clipBounds);
-            break;
-        default:
-            SkFAIL("unhandled positioning mode");
-        }
-
-        if (drawFilter) {
-            // A draw filter may change the paint arbitrarily, so we must re-seed in this case.
-            runPaint = skPaint;
-        }
-    }
-}
-
 static void GlyphCacheAuxProc(void* data) {
     GrFontScaler* scaler = (GrFontScaler*)data;
     SkSafeUnref(scaler);
 }
 
 GrFontScaler* GrTextContext::GetGrFontScaler(SkGlyphCache* cache) {
     void* auxData;
     GrFontScaler* scaler = nullptr;
 
     if (cache->getAuxProcData(GlyphCacheAuxProc, &auxData)) {
         scaler = (GrFontScaler*)auxData;
     }
     if (nullptr == scaler) {
         scaler = new GrFontScaler(cache);
         cache->setAuxProc(GlyphCacheAuxProc, scaler);
     }
 
     return scaler;
 }