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