1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkColor.h"
#include "SkPaint.h"
#include "SkPoint.h"
#include "SkRect.h"
#include "SkSurface.h"
#include "SkTypes.h"
#include "Test.h"
#include <math.h>
static const SkColor bgColor = SK_ColorWHITE;
static void create(SkBitmap* bm, SkIRect bound) {
bm->allocN32Pixels(bound.width(), bound.height());
}
static void drawBG(SkCanvas* canvas) {
canvas->drawColor(bgColor);
}
/** Assumes that the ref draw was completely inside ref canvas --
implies that everything outside is "bgColor".
Checks that all overlap is the same and that all non-overlap on the
ref is "bgColor".
*/
static bool compare(const SkBitmap& ref, const SkIRect& iref,
const SkBitmap& test, const SkIRect& itest)
{
const int xOff = itest.fLeft - iref.fLeft;
const int yOff = itest.fTop - iref.fTop;
for (int y = 0; y < test.height(); ++y) {
for (int x = 0; x < test.width(); ++x) {
SkColor testColor = test.getColor(x, y);
int refX = x + xOff;
int refY = y + yOff;
SkColor refColor;
if (refX >= 0 && refX < ref.width() &&
refY >= 0 && refY < ref.height())
{
refColor = ref.getColor(refX, refY);
} else {
refColor = bgColor;
}
if (refColor != testColor) {
return false;
}
}
}
return true;
}
DEF_TEST(DrawText, reporter) {
SkPaint paint;
paint.setColor(SK_ColorGRAY);
paint.setTextSize(SkIntToScalar(20));
SkIRect drawTextRect = SkIRect::MakeWH(64, 64);
SkBitmap drawTextBitmap;
create(&drawTextBitmap, drawTextRect);
SkCanvas drawTextCanvas(drawTextBitmap);
SkIRect drawPosTextRect = SkIRect::MakeWH(64, 64);
SkBitmap drawPosTextBitmap;
create(&drawPosTextBitmap, drawPosTextRect);
SkCanvas drawPosTextCanvas(drawPosTextBitmap);
// Two test cases "A" for the normal path through the code, and " " to check the
// early return path.
const char* cases[] = {"A", " "};
for (auto c : cases) {
for (float offsetY = 0.0f; offsetY < 1.0f; offsetY += (1.0f / 16.0f)) {
for (float offsetX = 0.0f; offsetX < 1.0f; offsetX += (1.0f / 16.0f)) {
SkPoint point = SkPoint::Make(25.0f + offsetX,
25.0f + offsetY);
for (int align = 0; align < SkPaint::kAlignCount; ++align) {
paint.setTextAlign(static_cast<SkPaint::Align>(align));
for (unsigned int flags = 0; flags < (1 << 3); ++flags) {
static const unsigned int antiAliasFlag = 1;
static const unsigned int subpixelFlag = 1 << 1;
static const unsigned int lcdFlag = 1 << 2;
paint.setAntiAlias(SkToBool(flags & antiAliasFlag));
paint.setSubpixelText(SkToBool(flags & subpixelFlag));
paint.setLCDRenderText(SkToBool(flags & lcdFlag));
// Test: drawText and drawPosText draw the same.
drawBG(&drawTextCanvas);
drawTextCanvas.drawText(c, 1, point.fX, point.fY, paint);
drawBG(&drawPosTextCanvas);
drawPosTextCanvas.drawPosText(c, 1, &point, paint);
REPORTER_ASSERT(reporter,
compare(drawTextBitmap, drawTextRect,
drawPosTextBitmap, drawPosTextRect));
}
}
}
}
}
}
// Test drawing text at some unusual coordinates.
// We measure success by not crashing or asserting.
DEF_TEST(DrawText_weirdCoordinates, r) {
auto surface = SkSurface::MakeRasterN32Premul(10,10);
auto canvas = surface->getCanvas();
SkScalar oddballs[] = { 0.0f, (float)INFINITY, (float)NAN, 34359738368.0f };
for (auto x : oddballs) {
canvas->drawString("a", +x, 0.0f, SkPaint());
canvas->drawString("a", -x, 0.0f, SkPaint());
}
for (auto y : oddballs) {
canvas->drawString("a", 0.0f, +y, SkPaint());
canvas->drawString("a", 0.0f, -y, SkPaint());
}
}
// Test drawing text with some unusual matricies.
// We measure success by not crashing or asserting.
DEF_TEST(DrawText_weirdMatricies, r) {
auto surface = SkSurface::MakeRasterN32Premul(100,100);
auto canvas = surface->getCanvas();
SkPaint paint;
paint.setAntiAlias(true);
paint.setLCDRenderText(true);
struct {
SkScalar textSize;
SkScalar matrix[9];
} testCases[] = {
// 2x2 singular
{10, { 0, 0, 0, 0, 0, 0, 0, 0, 1}},
{10, { 0, 0, 0, 0, 1, 0, 0, 0, 1}},
{10, { 0, 0, 0, 1, 0, 0, 0, 0, 1}},
{10, { 0, 0, 0, 1, 1, 0, 0, 0, 1}},
{10, { 0, 1, 0, 0, 1, 0, 0, 0, 1}},
{10, { 1, 0, 0, 0, 0, 0, 0, 0, 1}},
{10, { 1, 0, 0, 1, 0, 0, 0, 0, 1}},
{10, { 1, 1, 0, 0, 0, 0, 0, 0, 1}},
{10, { 1, 1, 0, 1, 1, 0, 0, 0, 1}},
// See https://bugzilla.mozilla.org/show_bug.cgi?id=1305085 .
{ 1, {10, 20, 0, 20, 40, 0, 0, 0, 1}},
};
for (const auto& testCase : testCases) {
paint.setTextSize(testCase.textSize);
const SkScalar(&m)[9] = testCase.matrix;
SkMatrix mat;
mat.setAll(m[0], m[1], m[2], m[3], m[4], m[5], m[6], m[7], m[8]);
canvas->setMatrix(mat);
canvas->drawString("Hamburgefons", 10, 10, paint);
}
}
|
