Home | History | Annotate | Download | only in gm 
      1 /*
      2  * Copyright 2015 Google Inc.
      3  *
      4  * Use of this source code is governed by a BD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #include "gm.h"
      9 
     10 #include "SkCanvas.h"
     11 #include "SkSurface.h"
     12 #include "SkTextBlob.h"
     13 
     14 // This tests that we don't try to reuse textblobs from the GPU textblob cache across pixel geometry
     15 // changes when we have LCD.  crbug/486744
     16 namespace skiagm {
     17 class TextBlobGeometryChange : public GM {
     18 public:
     19     TextBlobGeometryChange() { }
     20 
     21 protected:
     22     SkString onShortName() override {
     23         return SkString("textblobgeometrychange");
     24     }
     25 
     26     SkISize onISize() override {
     27         return SkISize::Make(kWidth, kHeight);
     28     }
     29 
     30     void onDraw(SkCanvas* canvas) override {
     31         const char text[] = "Hamburgefons";
     32 
     33         SkPaint paint;
     34         sk_tool_utils::set_portable_typeface(&paint);
     35         paint.setTextSize(20);
     36         paint.setAntiAlias(true);
     37         paint.setLCDRenderText(true);
     38 
     39         SkTextBlobBuilder builder;
     40 
     41         sk_tool_utils::add_to_text_blob(&builder, text, paint, 10, 10);
     42 
     43         SkAutoTUnref<const SkTextBlob> blob(builder.build());
     44 
     45         SkImageInfo info = SkImageInfo::MakeN32Premul(200, 200);
     46         SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
     47         SkAutoTUnref<SkSurface> surface(canvas->newSurface(info, &props));
     48         if (surface) {
     49             SkCanvas* c = surface->getCanvas();
     50 
     51             // LCD text on white background
     52             SkRect rect = SkRect::MakeLTRB(0.f, 0.f, SkIntToScalar(kWidth), kHeight / 2.f);
     53             SkPaint rectPaint;
     54             rectPaint.setColor(0xffffffff);
     55             canvas->drawRect(rect, rectPaint);
     56             canvas->drawTextBlob(blob.get(), 10, 50, paint);
     57 
     58             // This should not look garbled since we should disable LCD text in this case
     59             // (i.e., unknown pixel geometry)
     60             c->clear(0x00ffffff);
     61             c->drawTextBlob(blob.get(), 10, 150, paint);
     62             surface->draw(canvas, 0, 0, nullptr);
     63         } else {
     64             const char* text = "This test requires a surface";
     65             size_t len = strlen(text);
     66             SkPaint paint;
     67             canvas->drawText(text, len, 10, 100, paint);
     68         }
     69     }
     70 
     71 private:
     72     static const int kWidth = 200;
     73     static const int kHeight = 200;
     74 
     75     typedef GM INHERITED;
     76 };
     77 
     78 //////////////////////////////////////////////////////////////////////////////
     79 
     80 DEF_GM(return new TextBlobGeometryChange;)
     81 }
     82