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 "SkBitmap.h"
9 #include "SkCanvas.h"
10 #include "SkImage.h"
11 #include "SkSpecialImage.h"
12 #include "SkSpecialSurface.h"
13 #include "Test.h"
14
15 #if SK_SUPPORT_GPU
16 #include "GrContext.h"
17 #endif
18
19 class TestingSpecialImageAccess {
20 public:
Subset(const SkSpecialImage * img)21 static const SkIRect& Subset(const SkSpecialImage* img) {
22 return img->subset();
23 }
24
PeekPixels(const SkSpecialImage * img,SkPixmap * pixmap)25 static bool PeekPixels(const SkSpecialImage* img, SkPixmap* pixmap) {
26 return img->peekPixels(pixmap);
27 }
28
PeekTexture(const SkSpecialImage * img)29 static GrTexture* PeekTexture(const SkSpecialImage* img) {
30 return img->peekTexture();
31 }
32 };
33
34 // This test creates backing resources exactly sized to [kFullSize x kFullSize].
35 // It then wraps them in an SkSpecialImage with only the center (red) region being active.
36 // It then draws the SkSpecialImage to a full sized (all blue) canvas and checks that none
37 // of the inactive (green) region leaked out.
38
39 static const int kSmallerSize = 10;
40 static const int kPad = 3;
41 static const int kFullSize = kSmallerSize + 2 * kPad;
42
43 // Create a bitmap with red in the center and green around it
create_bm()44 static SkBitmap create_bm() {
45 SkBitmap bm;
46 bm.allocN32Pixels(kFullSize, kFullSize, true);
47
48 SkCanvas temp(bm);
49
50 temp.clear(SK_ColorGREEN);
51 SkPaint p;
52 p.setColor(SK_ColorRED);
53 p.setAntiAlias(false);
54
55 temp.drawRect(SkRect::MakeXYWH(SkIntToScalar(kPad), SkIntToScalar(kPad),
56 SkIntToScalar(kSmallerSize), SkIntToScalar(kSmallerSize)),
57 p);
58
59 return bm;
60 }
61
62 // Basic test of the SkSpecialImage public API (e.g., peekTexture, peekPixels & draw)
test_image(SkSpecialImage * img,skiatest::Reporter * reporter,bool peekPixelsSucceeds,bool peekTextureSucceeds)63 static void test_image(SkSpecialImage* img, skiatest::Reporter* reporter,
64 bool peekPixelsSucceeds, bool peekTextureSucceeds) {
65 const SkIRect subset = TestingSpecialImageAccess::Subset(img);
66 REPORTER_ASSERT(reporter, kPad == subset.left());
67 REPORTER_ASSERT(reporter, kPad == subset.top());
68 REPORTER_ASSERT(reporter, kSmallerSize == subset.width());
69 REPORTER_ASSERT(reporter, kSmallerSize == subset.height());
70
71 //--------------
72 REPORTER_ASSERT(reporter, peekTextureSucceeds == !!TestingSpecialImageAccess::PeekTexture(img));
73
74 //--------------
75 SkPixmap pixmap;
76 REPORTER_ASSERT(reporter, peekPixelsSucceeds ==
77 !!TestingSpecialImageAccess::PeekPixels(img, &pixmap));
78 if (peekPixelsSucceeds) {
79 REPORTER_ASSERT(reporter, kFullSize == pixmap.width());
80 REPORTER_ASSERT(reporter, kFullSize == pixmap.height());
81 }
82
83 //--------------
84 SkImageInfo info = SkImageInfo::MakeN32(kFullSize, kFullSize, kOpaque_SkAlphaType);
85
86 SkAutoTUnref<SkSpecialSurface> surf(img->newSurface(info));
87
88 SkCanvas* canvas = surf->getCanvas();
89
90 canvas->clear(SK_ColorBLUE);
91 img->draw(canvas, SkIntToScalar(kPad), SkIntToScalar(kPad), nullptr);
92
93 SkBitmap bm;
94 bm.allocN32Pixels(kFullSize, kFullSize, true);
95
96 bool result = canvas->readPixels(bm.info(), bm.getPixels(), bm.rowBytes(), 0, 0);
97 SkASSERT_RELEASE(result);
98
99 // Only the center (red) portion should've been drawn into the canvas
100 REPORTER_ASSERT(reporter, SK_ColorBLUE == bm.getColor(kPad-1, kPad-1));
101 REPORTER_ASSERT(reporter, SK_ColorRED == bm.getColor(kPad, kPad));
102 REPORTER_ASSERT(reporter, SK_ColorRED == bm.getColor(kSmallerSize+kPad-1,
103 kSmallerSize+kPad-1));
104 REPORTER_ASSERT(reporter, SK_ColorBLUE == bm.getColor(kSmallerSize+kPad,
105 kSmallerSize+kPad));
106 }
107
DEF_TEST(SpecialImage_Raster,reporter)108 DEF_TEST(SpecialImage_Raster, reporter) {
109 SkBitmap bm = create_bm();
110
111 const SkIRect& subset = SkIRect::MakeXYWH(kPad, kPad, kSmallerSize, kSmallerSize);
112
113 SkAutoTUnref<SkSpecialImage> img(SkSpecialImage::NewFromRaster(nullptr, subset, bm));
114 test_image(img, reporter, true, false);
115 }
116
DEF_TEST(SpecialImage_Image,reporter)117 DEF_TEST(SpecialImage_Image, reporter) {
118 SkBitmap bm = create_bm();
119
120 SkAutoTUnref<SkImage> fullImage(SkImage::NewFromBitmap(bm));
121
122 const SkIRect& subset = SkIRect::MakeXYWH(kPad, kPad, kSmallerSize, kSmallerSize);
123
124 SkAutoTUnref<SkSpecialImage> img(SkSpecialImage::NewFromImage(subset, fullImage));
125 test_image(img, reporter, true, false);
126 }
127
128 #if SK_SUPPORT_GPU
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SpecialImage_Gpu,reporter,context)129 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SpecialImage_Gpu, reporter, context) {
130 SkBitmap bm = create_bm();
131
132 GrSurfaceDesc desc;
133 desc.fConfig = kSkia8888_GrPixelConfig;
134 desc.fFlags = kNone_GrSurfaceFlags;
135 desc.fWidth = kFullSize;
136 desc.fHeight = kFullSize;
137
138 SkAutoTUnref<GrTexture> texture(context->textureProvider()->createTexture(desc, SkBudgeted::kNo,
139 bm.getPixels(), 0));
140 if (!texture) {
141 return;
142 }
143
144 const SkIRect& subset = SkIRect::MakeXYWH(kPad, kPad, kSmallerSize, kSmallerSize);
145
146 SkAutoTUnref<SkSpecialImage> img(SkSpecialImage::NewFromGpu(nullptr, subset,
147 kNeedNewImageUniqueID_SpecialImage,
148 texture));
149 test_image(img, reporter, false, true);
150 }
151
152 #endif
153