1 /*
2  * Copyright 2017 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 "TestUtils.h"
9 
10 #if SK_SUPPORT_GPU
11 
12 #include "GrProxyProvider.h"
13 #include "GrSurfaceContext.h"
14 #include "GrSurfaceProxy.h"
15 #include "GrTextureProxy.h"
16 
17 void test_read_pixels(skiatest::Reporter* reporter,
18                       GrSurfaceContext* srcContext, uint32_t expectedPixelValues[],
19                       const char* testName) {
20     int pixelCnt = srcContext->width() * srcContext->height();
21     SkAutoTMalloc<uint32_t> pixels(pixelCnt);
22     memset(pixels.get(), 0, sizeof(uint32_t)*pixelCnt);
23 
24     SkImageInfo ii = SkImageInfo::Make(srcContext->width(), srcContext->height(),
25                                        kRGBA_8888_SkColorType, kPremul_SkAlphaType);
26     bool read = srcContext->readPixels(ii, pixels.get(), 0, 0, 0);
27     if (!read) {
28         ERRORF(reporter, "%s: Error reading from texture.", testName);
29     }
30 
31     for (int i = 0; i < pixelCnt; ++i) {
32         if (pixels.get()[i] != expectedPixelValues[i]) {
33             ERRORF(reporter, "%s: Error, pixel value %d should be 0x%08x, got 0x%08x.",
34                    testName, i, expectedPixelValues[i], pixels.get()[i]);
35             break;
36         }
37     }
38 }
39 
40 void test_write_pixels(skiatest::Reporter* reporter,
41                        GrSurfaceContext* dstContext, bool expectedToWork,
42                        const char* testName) {
43     int pixelCnt = dstContext->width() * dstContext->height();
44     SkAutoTMalloc<uint32_t> pixels(pixelCnt);
45     for (int y = 0; y < dstContext->width(); ++y) {
46         for (int x = 0; x < dstContext->height(); ++x) {
47             pixels.get()[y * dstContext->width() + x] =
48                 GrPremulColor(GrColorPackRGBA(x, y, x + y, 2*y));
49         }
50     }
51 
52     SkImageInfo ii = SkImageInfo::Make(dstContext->width(), dstContext->height(),
53                                        kRGBA_8888_SkColorType, kPremul_SkAlphaType);
54     bool write = dstContext->writePixels(ii, pixels.get(), 0, 0, 0);
55     if (!write) {
56         if (expectedToWork) {
57             ERRORF(reporter, "%s: Error writing to texture.", testName);
58         }
59         return;
60     }
61 
62     if (write && !expectedToWork) {
63         ERRORF(reporter, "%s: writePixels succeeded when it wasn't supposed to.", testName);
64         return;
65     }
66 
67     test_read_pixels(reporter, dstContext, pixels.get(), testName);
68 }
69 
70 void test_copy_from_surface(skiatest::Reporter* reporter, GrContext* context,
71                             GrSurfaceProxy* proxy, uint32_t expectedPixelValues[],
72                             bool onlyTestRTConfig, const char* testName) {
73     GrSurfaceDesc copyDstDesc;
74     copyDstDesc.fWidth = proxy->width();
75     copyDstDesc.fHeight = proxy->height();
76     copyDstDesc.fConfig = kRGBA_8888_GrPixelConfig;
77 
78     for (auto flags : { kNone_GrSurfaceFlags, kRenderTarget_GrSurfaceFlag }) {
79         if (kNone_GrSurfaceFlags == flags && onlyTestRTConfig) {
80             continue;
81         }
82 
83         copyDstDesc.fFlags = flags;
84         copyDstDesc.fOrigin = (kNone_GrSurfaceFlags == flags) ? kTopLeft_GrSurfaceOrigin
85                                                               : kBottomLeft_GrSurfaceOrigin;
86 
87         sk_sp<GrSurfaceContext> dstContext(GrSurfaceProxy::TestCopy(context, copyDstDesc, proxy));
88 
89         test_read_pixels(reporter, dstContext.get(), expectedPixelValues, testName);
90     }
91 }
92 
93 void test_copy_to_surface(skiatest::Reporter* reporter, GrProxyProvider* proxyProvider,
94                           GrSurfaceContext* dstContext, const char* testName) {
95 
96     int pixelCnt = dstContext->width() * dstContext->height();
97     SkAutoTMalloc<uint32_t> pixels(pixelCnt);
98     for (int y = 0; y < dstContext->width(); ++y) {
99         for (int x = 0; x < dstContext->height(); ++x) {
100             pixels.get()[y * dstContext->width() + x] =
101                 GrPremulColor(GrColorPackRGBA(y, x, x * y, 2*y));
102         }
103     }
104 
105     GrSurfaceDesc copySrcDesc;
106     copySrcDesc.fWidth = dstContext->width();
107     copySrcDesc.fHeight = dstContext->height();
108     copySrcDesc.fConfig = kRGBA_8888_GrPixelConfig;
109 
110     for (auto flags : { kNone_GrSurfaceFlags, kRenderTarget_GrSurfaceFlag }) {
111         copySrcDesc.fFlags = flags;
112         copySrcDesc.fOrigin = (kNone_GrSurfaceFlags == flags) ? kTopLeft_GrSurfaceOrigin
113                                                               : kBottomLeft_GrSurfaceOrigin;
114 
115         sk_sp<GrTextureProxy> src = proxyProvider->createTextureProxy(copySrcDesc, SkBudgeted::kYes,
116                                                                       pixels.get(), 0);
117 
118         dstContext->copy(src.get());
119 
120         test_read_pixels(reporter, dstContext, pixels.get(), testName);
121     }
122 }
123 
124 #endif
125