1 /*
2 * Copyright 2016 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 /*
9 * This is a straightforward test of using packed pixel configs (4444, 565).
10 * This test will make sure that these RGBA_4444 and RGB_565 are always supported
11 * as valid texturing configs.
12 */
13
14 #include "Test.h"
15
16 #if SK_SUPPORT_GPU
17 #include "GrContext.h"
18 #include "GrContextPriv.h"
19 #include "GrResourceProvider.h"
20 #include "GrTextureProxy.h"
21
22 static const int DEV_W = 10, DEV_H = 10;
23 static const SkIRect DEV_RECT = SkIRect::MakeWH(DEV_W, DEV_H);
24 static const uint8_t TOL = 0x4;
25
check_component(skiatest::Reporter * reporter,uint8_t control,uint8_t test)26 static void check_component(skiatest::Reporter* reporter, uint8_t control, uint8_t test) {
27 uint8_t diff = 0;
28 if (control >= test) {
29 diff = control - test;
30 } else {
31 diff = test - control;
32 }
33 REPORTER_ASSERT(reporter, diff < TOL);
34 }
35
expand_value(uint8_t original,int sigBits)36 static uint8_t expand_value(uint8_t original, int sigBits) {
37 SkASSERT(sigBits >= 4);
38 uint8_t inSigBitShift = 8 - sigBits;
39 uint8_t duplBitShift = sigBits - inSigBitShift;
40 return (original << inSigBitShift) + (original >> duplBitShift);
41 }
42
check_4444(skiatest::Reporter * reporter,const SkTDArray<uint16_t> & controlData,const SkTDArray<uint32_t> & readBuffer)43 static void check_4444(skiatest::Reporter* reporter,
44 const SkTDArray<uint16_t>& controlData,
45 const SkTDArray<uint32_t>& readBuffer) {
46 for (int j = 0; j < DEV_H; ++j) {
47 for (int i = 0; i < DEV_W; ++i) {
48 uint16_t control = controlData[i + j * DEV_H];
49 uint32_t test = readBuffer[i + j * DEV_H];
50
51 // Test alpha component
52 uint8_t ctrlComp = expand_value(control & 0xF, 4);
53 uint8_t testComp = GrColorUnpackA(test);
54 check_component(reporter, ctrlComp, testComp);
55
56 // Test blue component
57 ctrlComp = expand_value((control >> 4) & 0xF, 4);
58 testComp = GrColorUnpackB(test);
59 check_component(reporter, ctrlComp, testComp);
60
61 // Test green component
62 ctrlComp = expand_value((control >> 8) & 0xF, 4);
63 testComp = GrColorUnpackG(test);
64 check_component(reporter, ctrlComp, testComp);
65
66 // Test red component
67 ctrlComp = expand_value((control >> 12) & 0xF, 4);
68 testComp = GrColorUnpackR(test);
69 check_component(reporter, ctrlComp, testComp);
70 }
71 }
72 }
73
check_565(skiatest::Reporter * reporter,const SkTDArray<uint16_t> & controlData,const SkTDArray<GrColor> & readBuffer)74 static void check_565(skiatest::Reporter* reporter,
75 const SkTDArray<uint16_t>& controlData,
76 const SkTDArray<GrColor>& readBuffer) {
77 for (int j = 0; j < DEV_H; ++j) {
78 for (int i = 0; i < DEV_W; ++i) {
79 uint16_t control = controlData[i + j * DEV_H];
80 GrColor test = readBuffer[i + j * DEV_H];
81 // Test blue component (5 bit control)
82 uint8_t ctrlComp = expand_value(control & 0x1F, 5);
83 uint8_t testComp = GrColorUnpackB(test);
84 check_component(reporter, ctrlComp, testComp);
85
86 // Test green component (6 bit control)
87 ctrlComp = expand_value((control >> 5) & 0x3F, 6);
88 testComp = GrColorUnpackG(test);
89 check_component(reporter, ctrlComp, testComp);
90
91 // Test red component (5 bit control)
92 ctrlComp = expand_value((control >> 11) & 0x1F, 5);
93 testComp = GrColorUnpackR(test);
94 check_component(reporter, ctrlComp, testComp);
95 }
96 }
97 }
98
run_test(skiatest::Reporter * reporter,GrContext * context,int arraySize,GrPixelConfig config)99 static void run_test(skiatest::Reporter* reporter, GrContext* context,
100 int arraySize, GrPixelConfig config) {
101 SkTDArray<uint16_t> controlPixelData;
102 // We will read back into an 8888 buffer since 565/4444 read backs aren't supported
103 SkTDArray<GrColor> readBuffer;
104 controlPixelData.setCount(arraySize);
105 readBuffer.setCount(arraySize);
106
107 for (int i = 0; i < arraySize; i += 2) {
108 controlPixelData[i] = 0xFF00;
109 controlPixelData[i + 1] = 0xFA62;
110 }
111
112 const SkImageInfo dstInfo = SkImageInfo::Make(DEV_W, DEV_H,
113 kRGBA_8888_SkColorType, kOpaque_SkAlphaType);
114
115 for (auto origin : { kTopLeft_GrSurfaceOrigin, kBottomLeft_GrSurfaceOrigin }) {
116 GrSurfaceDesc desc;
117 desc.fFlags = kNone_GrSurfaceFlags;
118 desc.fWidth = DEV_W;
119 desc.fHeight = DEV_H;
120 desc.fConfig = config;
121 desc.fOrigin = origin;
122
123 sk_sp<GrTextureProxy> proxy = GrSurfaceProxy::MakeDeferred(context->resourceProvider(),
124 desc, SkBudgeted::kNo,
125 controlPixelData.begin(), 0);
126 SkASSERT(proxy);
127
128 sk_sp<GrSurfaceContext> sContext = context->contextPriv().makeWrappedSurfaceContext(
129 std::move(proxy), nullptr);
130
131 SkAssertResult(sContext->readPixels(dstInfo, readBuffer.begin(), 0, 0, 0));
132
133 if (kRGBA_4444_GrPixelConfig == config) {
134 check_4444(reporter, controlPixelData, readBuffer);
135 } else {
136 SkASSERT(kRGB_565_GrPixelConfig == config);
137 check_565(reporter, controlPixelData, readBuffer);
138 }
139 }
140 }
141
142 static const int CONTROL_ARRAY_SIZE = DEV_W * DEV_H;
143
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(RGBA4444TextureTest,reporter,ctxInfo)144 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(RGBA4444TextureTest, reporter, ctxInfo) {
145 run_test(reporter, ctxInfo.grContext(), CONTROL_ARRAY_SIZE, kRGBA_4444_GrPixelConfig);
146 }
147
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(RGB565TextureTest,reporter,ctxInfo)148 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(RGB565TextureTest, reporter, ctxInfo) {
149 run_test(reporter, ctxInfo.grContext(), CONTROL_ARRAY_SIZE, kRGB_565_GrPixelConfig);
150 }
151
152 #endif
153