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#include "SkTypes.h"
8
9#include "Test.h"
10#include "SkBitmap.h"
11#include "SkCanvas.h"
12#include "SkColor.h"
13#include "SkPaint.h"
14#include "SkPoint.h"
15#include "SkRect.h"
16
17///////////////////////////////////////////////////////////////////////////////
18
19static const SkColor bgColor = SK_ColorWHITE;
20
21static void create(SkBitmap* bm, SkIRect bound, SkBitmap::Config config) {
22    bm->setConfig(config, bound.width(), bound.height());
23    bm->allocPixels();
24}
25
26static void drawBG(SkCanvas* canvas) {
27    canvas->drawColor(bgColor);
28}
29
30/** Assumes that the ref draw was completely inside ref canvas --
31    implies that everything outside is "bgColor".
32    Checks that all overlap is the same and that all non-overlap on the
33    ref is "bgColor".
34 */
35static bool compare(const SkBitmap& ref, const SkIRect& iref,
36                    const SkBitmap& test, const SkIRect& itest)
37{
38    const int xOff = itest.fLeft - iref.fLeft;
39    const int yOff = itest.fTop - iref.fTop;
40
41    SkAutoLockPixels alpRef(ref);
42    SkAutoLockPixels alpTest(test);
43
44    for (int y = 0; y < test.height(); ++y) {
45        for (int x = 0; x < test.width(); ++x) {
46            SkColor testColor = test.getColor(x, y);
47            int refX = x + xOff;
48            int refY = y + yOff;
49            SkColor refColor;
50            if (refX >= 0 && refX < ref.width() &&
51                refY >= 0 && refY < ref.height())
52            {
53                refColor = ref.getColor(refX, refY);
54            } else {
55                refColor = bgColor;
56            }
57            if (refColor != testColor) {
58                return false;
59            }
60        }
61    }
62    return true;
63}
64
65static void test_drawText(skiatest::Reporter* reporter) {
66
67    SkPaint paint;
68    paint.setColor(SK_ColorGRAY);
69    paint.setTextSize(SkIntToScalar(20));
70
71    SkIRect drawTextRect = SkIRect::MakeWH(64, 64);
72    SkBitmap drawTextBitmap;
73    create(&drawTextBitmap, drawTextRect, SkBitmap::kARGB_8888_Config);
74    SkCanvas drawTextCanvas(drawTextBitmap);
75
76    SkIRect drawPosTextRect = SkIRect::MakeWH(64, 64);
77    SkBitmap drawPosTextBitmap;
78    create(&drawPosTextBitmap, drawPosTextRect, SkBitmap::kARGB_8888_Config);
79    SkCanvas drawPosTextCanvas(drawPosTextBitmap);
80
81    for (float offsetY = 0.0f; offsetY < 1.0f; offsetY += (1.0f / 16.0f)) {
82        for (float offsetX = 0.0f; offsetX < 1.0f; offsetX += (1.0f / 16.0f)) {
83            SkPoint point = SkPoint::Make(SkFloatToScalar(25.0f + offsetX),
84                                          SkFloatToScalar(25.0f + offsetY));
85
86            for (int align = 0; align < SkPaint::kAlignCount; ++align) {
87                paint.setTextAlign(static_cast<SkPaint::Align>(align));
88
89                for (unsigned int flags = 0; flags < (1 << 3); ++flags) {
90                    static const unsigned int antiAliasFlag = 1;
91                    static const unsigned int subpixelFlag = 1 << 1;
92                    static const unsigned int lcdFlag = 1 << 2;
93
94                    paint.setAntiAlias(SkToBool(flags & antiAliasFlag));
95                    paint.setSubpixelText(SkToBool(flags & subpixelFlag));
96                    paint.setLCDRenderText(SkToBool(flags & lcdFlag));
97
98                    // Test: drawText and drawPosText draw the same.
99                    drawBG(&drawTextCanvas);
100                    drawTextCanvas.drawText("A", 1, point.fX, point.fY, paint);
101
102                    drawBG(&drawPosTextCanvas);
103                    drawPosTextCanvas.drawPosText("A", 1, &point, paint);
104
105                    REPORTER_ASSERT(reporter,
106                        compare(drawTextBitmap, drawTextRect,
107                                drawPosTextBitmap, drawPosTextRect));
108                }
109            }
110        }
111    }
112}
113
114#include "TestClassDef.h"
115DEFINE_TESTCLASS("DrawText_DrawPosText", DrawTextTestClass, test_drawText)
116