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
|
/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Resources.h"
#include "SkBitmap.h"
#include "SkData.h"
#include "SkImageGenerator.h"
#include "SkForceLinking.h"
#include "SkImageDecoder.h"
#include "SkOSFile.h"
#include "SkRandom.h"
#include "SkStream.h"
#include "Test.h"
__SK_FORCE_IMAGE_DECODER_LINKING;
/**
* First, make sure that writing an 8-bit RGBA KTX file and then
* reading it produces the same bitmap.
*/
DEF_TEST(KtxReadWrite, reporter) {
// Random number generator with explicit seed for reproducibility
SkRandom rand(0x1005cbad);
SkBitmap bm8888;
bm8888.allocN32Pixels(128, 128);
uint8_t *pixels = reinterpret_cast<uint8_t*>(bm8888.getPixels());
REPORTER_ASSERT(reporter, pixels);
if (nullptr == pixels) {
return;
}
uint8_t *row = pixels;
for (int y = 0; y < bm8888.height(); ++y) {
for (int x = 0; x < bm8888.width(); ++x) {
uint8_t a = rand.nextRangeU(0, 255);
uint8_t r = rand.nextRangeU(0, 255);
uint8_t g = rand.nextRangeU(0, 255);
uint8_t b = rand.nextRangeU(0, 255);
SkPMColor &pixel = *(reinterpret_cast<SkPMColor*>(row + x*sizeof(SkPMColor)));
pixel = SkPreMultiplyARGB(a, r, g, b);
}
row += bm8888.rowBytes();
}
REPORTER_ASSERT(reporter, !(bm8888.empty()));
SkAutoDataUnref encodedData(SkImageEncoder::EncodeData(bm8888, SkImageEncoder::kKTX_Type, 0));
if (nullptr == encodedData.get()) {
ERRORF(reporter, "failed to encode the bitmap to KTX");
return;
}
SkAutoTDelete<SkMemoryStream> stream(new SkMemoryStream(encodedData));
REPORTER_ASSERT(reporter, stream);
SkBitmap decodedBitmap;
bool imageDecodeSuccess = SkImageDecoder::DecodeStream(stream, &decodedBitmap);
if (!imageDecodeSuccess) {
ERRORF(reporter, "failed to decode the KTX stream");
return;
}
REPORTER_ASSERT(reporter, decodedBitmap.colorType() == bm8888.colorType());
REPORTER_ASSERT(reporter, decodedBitmap.alphaType() == bm8888.alphaType());
REPORTER_ASSERT(reporter, decodedBitmap.width() == bm8888.width());
REPORTER_ASSERT(reporter, decodedBitmap.height() == bm8888.height());
REPORTER_ASSERT(reporter, !(decodedBitmap.empty()));
uint8_t *decodedPixels = reinterpret_cast<uint8_t*>(decodedBitmap.getPixels());
REPORTER_ASSERT(reporter, decodedPixels);
REPORTER_ASSERT(reporter, decodedBitmap.getSize() == bm8888.getSize());
if (nullptr == decodedPixels) {
return;
}
REPORTER_ASSERT(reporter, memcmp(decodedPixels, pixels, decodedBitmap.getSize()) == 0);
}
/**
* Next test is to see whether or not reading an unpremultiplied KTX file accurately
* creates a premultiplied buffer...
*/
DEF_TEST(KtxReadUnpremul, reporter) {
static const uint8_t kHalfWhiteKTX[] = {
0xAB, 0x4B, 0x54, 0x58, 0x20, 0x31, // First twelve bytes is magic
0x31, 0xBB, 0x0D, 0x0A, 0x1A, 0x0A, // KTX identifier string
0x01, 0x02, 0x03, 0x04, // Then magic endian specifier
0x01, 0x14, 0x00, 0x00, // uint32_t fGLType;
0x01, 0x00, 0x00, 0x00, // uint32_t fGLTypeSize;
0x08, 0x19, 0x00, 0x00, // uint32_t fGLFormat;
0x58, 0x80, 0x00, 0x00, // uint32_t fGLInternalFormat;
0x08, 0x19, 0x00, 0x00, // uint32_t fGLBaseInternalFormat;
0x02, 0x00, 0x00, 0x00, // uint32_t fPixelWidth;
0x02, 0x00, 0x00, 0x00, // uint32_t fPixelHeight;
0x00, 0x00, 0x00, 0x00, // uint32_t fPixelDepth;
0x00, 0x00, 0x00, 0x00, // uint32_t fNumberOfArrayElements;
0x01, 0x00, 0x00, 0x00, // uint32_t fNumberOfFaces;
0x01, 0x00, 0x00, 0x00, // uint32_t fNumberOfMipmapLevels;
0x00, 0x00, 0x00, 0x00, // uint32_t fBytesOfKeyValueData;
0x10, 0x00, 0x00, 0x00, // image size: 2x2 image of RGBA = 4 * 4 = 16 bytes
0xFF, 0xFF, 0xFF, 0x80, // Pixel 1
0xFF, 0xFF, 0xFF, 0x80, // Pixel 2
0xFF, 0xFF, 0xFF, 0x80, // Pixel 3
0xFF, 0xFF, 0xFF, 0x80};// Pixel 4
SkAutoTDelete<SkMemoryStream> stream(new SkMemoryStream(kHalfWhiteKTX, sizeof(kHalfWhiteKTX)));
REPORTER_ASSERT(reporter, stream);
SkBitmap decodedBitmap;
bool imageDecodeSuccess = SkImageDecoder::DecodeStream(stream, &decodedBitmap);
if (!imageDecodeSuccess) {
ERRORF(reporter, "failed to decode the KTX stream");
return;
}
REPORTER_ASSERT(reporter, decodedBitmap.colorType() == kN32_SkColorType);
REPORTER_ASSERT(reporter, decodedBitmap.alphaType() == kPremul_SkAlphaType);
REPORTER_ASSERT(reporter, decodedBitmap.width() == 2);
REPORTER_ASSERT(reporter, decodedBitmap.height() == 2);
REPORTER_ASSERT(reporter, !(decodedBitmap.empty()));
uint8_t *decodedPixels = reinterpret_cast<uint8_t*>(decodedBitmap.getPixels());
REPORTER_ASSERT(reporter, decodedPixels);
uint8_t *row = decodedPixels;
for (int j = 0; j < decodedBitmap.height(); ++j) {
for (int i = 0; i < decodedBitmap.width(); ++i) {
SkPMColor pixel = *(reinterpret_cast<SkPMColor*>(row + i*sizeof(SkPMColor)));
REPORTER_ASSERT(reporter, SkPreMultiplyARGB(0x80, 0xFF, 0xFF, 0xFF) == pixel);
}
row += decodedBitmap.rowBytes();
}
}
|
