[graphite] For now, draw glyphs as paths.

Adds a parameter to SDFTControl that forces all glyphs to fail as SDF
or Direct, and sets it in the Graphite Device constructor.

Bug: skia:13118
Change-Id: I212e35e992bb14925ec66fca610bb0825ff467b8
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/550618
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>

src/gpu/graphite/Device.cpp

@@ -196,7 +196,7 @@ Device::Device(Recorder* recorder, sk_sp<DrawContext> dc)
         , fCachedLocalToDevice(SkM44())
         , fCurrentDepth(DrawOrder::kClearDepth)
         // TODO: set this up based on ContextOptions
-        , fSDFTControl(true, false, 18, 324)
+        , fSDFTControl(true, false, 18, 324, true)
         , fDrawsOverlap(false) {
     SkASSERT(SkToBool(fDC) && SkToBool(fRecorder));
     fRecorder->registerDevice(this);

src/text/gpu/SDFTControl.cpp

@@ -38,20 +38,23 @@ SkScalar SDFTControl::MinSDFTRange(bool useSDFTForSmallText, SkScalar min) {
 }
 
 SDFTControl::SDFTControl(
-        bool ableToUseSDFT, bool useSDFTForSmallText, SkScalar min, SkScalar max)
+        bool ableToUseSDFT, bool useSDFTForSmallText, SkScalar min, SkScalar max, bool forcePaths)
         : fMinDistanceFieldFontSize{MinSDFTRange(useSDFTForSmallText, min)}
         , fMaxDistanceFieldFontSize{max}
-        , fAbleToUseSDFT{ableToUseSDFT} {
+        , fAbleToUseSDFT{ableToUseSDFT}
+        , fForcePaths{forcePaths} {
     SkASSERT_RELEASE(0 < min && min <= max);
 }
 
 bool SDFTControl::isDirect(SkScalar approximateDeviceTextSize, const SkPaint& paint) const {
-    return !isSDFT(approximateDeviceTextSize, paint) &&
+    return !fForcePaths &&
+           !isSDFT(approximateDeviceTextSize, paint) &&
             approximateDeviceTextSize < SkStrikeCommon::kSkSideTooBigForAtlas;
 }
 
 bool SDFTControl::isSDFT(SkScalar approximateDeviceTextSize, const SkPaint& paint) const {
-    return fAbleToUseSDFT &&
+    return !fForcePaths &&
+           fAbleToUseSDFT &&
            paint.getMaskFilter() == nullptr &&
            paint.getStyle() == SkPaint::kFill_Style &&
            fMinDistanceFieldFontSize <= approximateDeviceTextSize &&

src/text/gpu/SDFTControl.h

@@ -35,7 +35,8 @@ private:
 
 class SDFTControl {
 public:
-    SDFTControl(bool ableToUseSDFT, bool useSDFTForSmallText, SkScalar min, SkScalar max);
+    SDFTControl(bool ableToUseSDFT, bool useSDFTForSmallText, SkScalar min, SkScalar max,
+                bool forcePaths = false);
 
     // Produce a font, a scale factor from the nominal size to the source space size, and matrix
     // range where this font can be reused.
@@ -44,6 +45,7 @@ public:
 
     bool isDirect(SkScalar approximateDeviceTextSize, const SkPaint& paint) const;
     bool isSDFT(SkScalar approximateDeviceTextSize, const SkPaint& paint) const;
+    bool forcePaths() const { return fForcePaths; }
 
 private:
     static SkScalar MinSDFTRange(bool useSDFTForSmallText, SkScalar min);
@@ -56,6 +58,7 @@ private:
     const SkScalar fMaxDistanceFieldFontSize;
 
     const bool fAbleToUseSDFT;
+    const bool fForcePaths;
 };
 
 }  // namespace sktext::gpu

src/text/gpu/SubRunContainer.cpp

@@ -2226,7 +2226,7 @@ std::tuple<bool, SubRunContainerOwner> SubRunContainer::MakeInAlloc(
                 }
             }
 
-            if (!rejected->source().empty()) {
+            if (!rejected->source().empty() && !SDFTControl.forcePaths()) {
                 // Process masks including ARGB - this should be the 99.99% case.
                 // This will handle medium size emoji that are sharing the run with SDFT drawn text.
                 // If things are too big they will be passed along to the drawing of last resort