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      1 /*
      2  * Copyright 2011 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #include "SkBitmap.h"
      9 #include "SkCanvas.h"
     10 #include "SkColor.h"
     11 #include "SkFontDescriptor.h"
     12 #include "SkFontHost.h"
     13 #include "SkGraphics.h"
     14 #include "SkPaint.h"
     15 #include "SkPoint.h"
     16 #include "SkRect.h"
     17 #include "SkStream.h"
     18 #include "SkTypeface.h"
     19 #include "SkTypes.h"
     20 #include "Test.h"
     21 
     22 static const SkColor bgColor = SK_ColorWHITE;
     23 
     24 static void create(SkBitmap* bm, SkIRect bound) {
     25     bm->allocN32Pixels(bound.width(), bound.height());
     26 }
     27 
     28 static void drawBG(SkCanvas* canvas) {
     29     canvas->drawColor(bgColor);
     30 }
     31 
     32 /** Assumes that the ref draw was completely inside ref canvas --
     33     implies that everything outside is "bgColor".
     34     Checks that all overlap is the same and that all non-overlap on the
     35     ref is "bgColor".
     36  */
     37 static bool compare(const SkBitmap& ref, const SkIRect& iref,
     38                     const SkBitmap& test, const SkIRect& itest)
     39 {
     40     const int xOff = itest.fLeft - iref.fLeft;
     41     const int yOff = itest.fTop - iref.fTop;
     42 
     43     SkAutoLockPixels alpRef(ref);
     44     SkAutoLockPixels alpTest(test);
     45 
     46     for (int y = 0; y < test.height(); ++y) {
     47         for (int x = 0; x < test.width(); ++x) {
     48             SkColor testColor = test.getColor(x, y);
     49             int refX = x + xOff;
     50             int refY = y + yOff;
     51             SkColor refColor;
     52             if (refX >= 0 && refX < ref.width() &&
     53                 refY >= 0 && refY < ref.height())
     54             {
     55                 refColor = ref.getColor(refX, refY);
     56             } else {
     57                 refColor = bgColor;
     58             }
     59             if (refColor != testColor) {
     60                 return false;
     61             }
     62         }
     63     }
     64     return true;
     65 }
     66 
     67 DEF_TEST(FontHostStream, reporter) {
     68     {
     69         SkPaint paint;
     70         paint.setColor(SK_ColorGRAY);
     71         paint.setTextSize(SkIntToScalar(30));
     72 
     73         SkTypeface* fTypeface = SkTypeface::CreateFromName("Georgia",
     74                                                            SkTypeface::kNormal);
     75         SkSafeUnref(paint.setTypeface(fTypeface));
     76 
     77         SkIRect origRect = SkIRect::MakeWH(64, 64);
     78         SkBitmap origBitmap;
     79         create(&origBitmap, origRect);
     80         SkCanvas origCanvas(origBitmap);
     81 
     82         SkIRect streamRect = SkIRect::MakeWH(64, 64);
     83         SkBitmap streamBitmap;
     84         create(&streamBitmap, streamRect);
     85         SkCanvas streamCanvas(streamBitmap);
     86 
     87         SkPoint point = SkPoint::Make(24, 32);
     88 
     89         // Test: origTypeface and streamTypeface from orig data draw the same
     90         drawBG(&origCanvas);
     91         origCanvas.drawText("A", 1, point.fX, point.fY, paint);
     92 
     93         SkTypeface* origTypeface = paint.getTypeface();
     94         SkAutoTUnref<SkTypeface> aur;
     95         if (NULL == origTypeface) {
     96             origTypeface = aur.reset(SkTypeface::RefDefault());
     97         }
     98 
     99         int ttcIndex;
    100         SkAutoTUnref<SkStream> fontData(origTypeface->openStream(&ttcIndex));
    101         SkTypeface* streamTypeface = SkTypeface::CreateFromStream(fontData);
    102 
    103         SkFontDescriptor desc;
    104         bool isLocalStream = false;
    105         streamTypeface->getFontDescriptor(&desc, &isLocalStream);
    106         REPORTER_ASSERT(reporter, isLocalStream);
    107 
    108         SkSafeUnref(paint.setTypeface(streamTypeface));
    109         drawBG(&streamCanvas);
    110         streamCanvas.drawPosText("A", 1, &point, paint);
    111 
    112         REPORTER_ASSERT(reporter,
    113                         compare(origBitmap, origRect, streamBitmap, streamRect));
    114     }
    115     //Make sure the typeface is deleted and removed.
    116     SkGraphics::PurgeFontCache();
    117 }
    118