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 "SkPaint.h"
12 #include "SkPoint.h"
13 #include "SkRect.h"
14 #include "SkTypes.h"
15 #include "Test.h"
16
17 static const SkColor bgColor = SK_ColorWHITE;
18
create(SkBitmap * bm,SkIRect bound)19 static void create(SkBitmap* bm, SkIRect bound) {
20 bm->allocN32Pixels(bound.width(), bound.height());
21 }
22
drawBG(SkCanvas * canvas)23 static void drawBG(SkCanvas* canvas) {
24 canvas->drawColor(bgColor);
25 }
26
27 /** Assumes that the ref draw was completely inside ref canvas --
28 implies that everything outside is "bgColor".
29 Checks that all overlap is the same and that all non-overlap on the
30 ref is "bgColor".
31 */
compare(const SkBitmap & ref,const SkIRect & iref,const SkBitmap & test,const SkIRect & itest)32 static bool compare(const SkBitmap& ref, const SkIRect& iref,
33 const SkBitmap& test, const SkIRect& itest)
34 {
35 const int xOff = itest.fLeft - iref.fLeft;
36 const int yOff = itest.fTop - iref.fTop;
37
38 SkAutoLockPixels alpRef(ref);
39 SkAutoLockPixels alpTest(test);
40
41 for (int y = 0; y < test.height(); ++y) {
42 for (int x = 0; x < test.width(); ++x) {
43 SkColor testColor = test.getColor(x, y);
44 int refX = x + xOff;
45 int refY = y + yOff;
46 SkColor refColor;
47 if (refX >= 0 && refX < ref.width() &&
48 refY >= 0 && refY < ref.height())
49 {
50 refColor = ref.getColor(refX, refY);
51 } else {
52 refColor = bgColor;
53 }
54 if (refColor != testColor) {
55 return false;
56 }
57 }
58 }
59 return true;
60 }
61
DEF_TEST(DrawText,reporter)62 DEF_TEST(DrawText, reporter) {
63 SkPaint paint;
64 paint.setColor(SK_ColorGRAY);
65 paint.setTextSize(SkIntToScalar(20));
66
67 SkIRect drawTextRect = SkIRect::MakeWH(64, 64);
68 SkBitmap drawTextBitmap;
69 create(&drawTextBitmap, drawTextRect);
70 SkCanvas drawTextCanvas(drawTextBitmap);
71
72 SkIRect drawPosTextRect = SkIRect::MakeWH(64, 64);
73 SkBitmap drawPosTextBitmap;
74 create(&drawPosTextBitmap, drawPosTextRect);
75 SkCanvas drawPosTextCanvas(drawPosTextBitmap);
76
77 // Two test cases "A" for the normal path through the code, and " " to check the
78 // early return path.
79 const char* cases[] = {"A", " "};
80 for (auto c : cases) {
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(25.0f + offsetX,
84 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(c, 1, point.fX, point.fY, paint);
101
102 drawBG(&drawPosTextCanvas);
103 drawPosTextCanvas.drawPosText(c, 1, &point, paint);
104
105 REPORTER_ASSERT(reporter,
106 compare(drawTextBitmap, drawTextRect,
107 drawPosTextBitmap, drawPosTextRect));
108 }
109 }
110 }
111 }
112 }
113 }
114