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
19 static const SkColor bgColor = SK_ColorWHITE;
20
create(SkBitmap * bm,SkIRect bound,SkBitmap::Config config)21 static void create(SkBitmap* bm, SkIRect bound, SkBitmap::Config config) {
22 bm->setConfig(config, bound.width(), bound.height());
23 bm->allocPixels();
24 }
25
drawBG(SkCanvas * canvas)26 static 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 */
compare(const SkBitmap & ref,const SkIRect & iref,const SkBitmap & test,const SkIRect & itest)35 static 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
test_drawText(skiatest::Reporter * reporter)65 static 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"
115 DEFINE_TESTCLASS("DrawText_DrawPosText", DrawTextTestClass, test_drawText)
116