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#include <initializer_list>
9#include "Test.h"
10
11#if SK_SUPPORT_GPU
12#include "GrContext.h"
13#include "GrTexture.h"
14#include "GrTextureProvider.h"
15
16#include "SkUtils.h"
17
18DEF_GPUTEST_FOR_RENDERING_CONTEXTS(CopySurface, reporter, context) {
19    static const int kW = 10;
20    static const int kH = 10;
21    static const size_t kRowBytes = sizeof(uint32_t) * kW;
22
23    GrSurfaceDesc baseDesc;
24    baseDesc.fConfig = kRGBA_8888_GrPixelConfig;
25    baseDesc.fWidth = kW;
26    baseDesc.fHeight = kH;
27
28    SkAutoTMalloc<uint32_t> srcPixels(kW * kH);
29    for (int i = 0; i < kW * kH; ++i) {
30        srcPixels.get()[i] = i;
31    }
32
33    SkAutoTMalloc<uint32_t> dstPixels(kW * kH);
34    for (int i = 0; i < kW * kH; ++i) {
35        dstPixels.get()[i] = ~i;
36    }
37
38    static const SkIRect kSrcRects[] {
39        { 0,  0, kW  , kH  },
40        {-1, -1, kW+1, kH+1},
41        { 1,  1, kW-1, kH-1},
42        { 5,  5, 6   , 6   },
43    };
44
45    static const SkIPoint kDstPoints[] {
46        { 0   ,  0   },
47        { 1   ,  1   },
48        { kW/2,  kH/4},
49        { kW-1,  kH-1},
50        { kW  ,  kH  },
51        { kW+1,  kH+2},
52        {-1   , -1   },
53    };
54
55    SkAutoTMalloc<uint32_t> read(kW * kH);
56
57    for (auto sOrigin : {kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin}) {
58        for (auto dOrigin : {kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin}) {
59            for (auto sFlags: {kRenderTarget_GrSurfaceFlag, kNone_GrSurfaceFlags}) {
60                for (auto dFlags: {kRenderTarget_GrSurfaceFlag, kNone_GrSurfaceFlags}) {
61                    for (auto srcRect : kSrcRects) {
62                        for (auto dstPoint : kDstPoints) {
63                            GrSurfaceDesc srcDesc = baseDesc;
64                            srcDesc.fOrigin = sOrigin;
65                            srcDesc.fFlags = sFlags;
66                            GrSurfaceDesc dstDesc = baseDesc;
67                            dstDesc.fOrigin = dOrigin;
68                            dstDesc.fFlags = dFlags;
69
70                            SkAutoTUnref<GrTexture> src(
71                                context->textureProvider()->createTexture(srcDesc, SkBudgeted::kNo,
72                                                                          srcPixels.get(),
73                                                                          kRowBytes));
74                            SkAutoTUnref<GrTexture> dst(
75                                context->textureProvider()->createTexture(dstDesc, SkBudgeted::kNo,
76                                                                          dstPixels.get(),
77                                                                          kRowBytes));
78                            if (!src || !dst) {
79                                ERRORF(reporter,
80                                       "Could not create surfaces for copy surface test.");
81                                continue;
82                            }
83
84                            bool result = context->copySurface(dst, src, srcRect, dstPoint);
85
86                            bool expectedResult = true;
87                            SkIPoint dstOffset = { dstPoint.fX - srcRect.fLeft,
88                                                   dstPoint.fY - srcRect.fTop };
89                            SkIRect copiedDstRect = SkIRect::MakeXYWH(dstPoint.fX,
90                                                                      dstPoint.fY,
91                                                                      srcRect.width(),
92                                                                      srcRect.height());
93
94                            SkIRect copiedSrcRect;
95                            if (!copiedSrcRect.intersect(srcRect, SkIRect::MakeWH(kW, kH))) {
96                                expectedResult = false;
97                            } else {
98                                // If the src rect was clipped, apply same clipping to each side of
99                                // copied dst rect.
100                                copiedDstRect.fLeft += copiedSrcRect.fLeft - srcRect.fLeft;
101                                copiedDstRect.fTop += copiedSrcRect.fTop - srcRect.fTop;
102                                copiedDstRect.fRight -= copiedSrcRect.fRight - srcRect.fRight;
103                                copiedDstRect.fBottom -= copiedSrcRect.fBottom - srcRect.fBottom;
104                            }
105                            if (copiedDstRect.isEmpty() ||
106                                !copiedDstRect.intersect(SkIRect::MakeWH(kW, kH))) {
107                                expectedResult = false;
108                            }
109                            // To make the copied src rect correct we would apply any dst clipping
110                            // back to the src rect, but we don't use it again so don't bother.
111                            if (expectedResult != result) {
112                                ERRORF(reporter, "Expected return value %d from copySurface, got "
113                                       "%d.", expectedResult, result);
114                                continue;
115                            }
116
117                            if (!expectedResult || !result) {
118                                continue;
119                            }
120
121                            sk_memset32(read.get(), 0, kW * kH);
122                            if (!dst->readPixels(0, 0, kW, kH, baseDesc.fConfig, read.get(),
123                                                 kRowBytes)) {
124                                ERRORF(reporter, "Error calling readPixels");
125                                continue;
126                            }
127
128                            bool abort = false;
129                            // Validate that pixels inside copiedDstRect received the correct value
130                            // from src and that those outside were not modified.
131                            for (int y = 0; y < kH && !abort; ++y) {
132                                for (int x = 0; x < kW; ++x) {
133                                    uint32_t r = read.get()[y * kW + x];
134                                    if (copiedDstRect.contains(x, y)) {
135                                        int sx = x - dstOffset.fX;
136                                        int sy = y - dstOffset.fY;
137                                        uint32_t s = srcPixels.get()[sy * kW + sx];
138                                        if (s != r) {
139                                            ERRORF(reporter, "Expected dst %d,%d to contain "
140                                                   "0x%08x copied from src location %d,%d. Got "
141                                                   "0x%08x", x, y, s, sx, sy, r);
142                                            abort = true;
143                                            break;
144                                        }
145                                    } else {
146                                        uint32_t d = dstPixels.get()[y * kW + x];
147                                        if (d != r) {
148                                            ERRORF(reporter, "Expected dst %d,%d to be unmodified ("
149                                                   "0x%08x). Got 0x%08x", x, y, d, r);
150                                            abort = true;
151                                            break;
152                                        }
153                                    }
154                                }
155                            }
156                        }
157                    }
158                }
159            }
160        }
161    }
162}
163#endif
164