1 /*
2 * Copyright 2018 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 "gm/gm.h"
9 #include "include/core/SkCanvas.h"
10 #include "include/core/SkImage.h"
11 #include "include/core/SkMatrix.h"
12 #include "include/core/SkPaint.h"
13 #include "include/core/SkRect.h"
14 #include "include/core/SkRefCnt.h"
15 #include "include/core/SkSize.h"
16 #include "include/core/SkString.h"
17 #include "include/private/base/SkTArray.h"
18 #include "include/private/base/SkTDArray.h"
19 #include "tools/DecodeUtils.h"
20 #include "tools/GpuToolUtils.h"
21 #include "tools/Resources.h"
22 #include "tools/ToolUtils.h"
23
24 #include <initializer_list>
25
26 using namespace skia_private;
27
make_image1()28 static sk_sp<SkImage> make_image1() {
29 return ToolUtils::GetResourceAsImage("images/mandrill_128.png");
30 }
31
make_image2()32 static sk_sp<SkImage> make_image2() {
33 return ToolUtils::GetResourceAsImage("images/brickwork-texture.jpg")
34 ->makeSubset(nullptr, {0, 0, 128, 128});
35 }
36
37 namespace skiagm {
38
39 class PerspImages : public GM {
40 public:
41 PerspImages() = default;
42
43 protected:
getName() const44 SkString getName() const override { return SkString("persp_images"); }
45
getISize()46 SkISize getISize() override { return SkISize::Make(1150, 1280); }
47
onOnceBeforeDraw()48 void onOnceBeforeDraw() override {
49 fImages.push_back(make_image1());
50 fImages.push_back(make_image2());
51 }
52
onDraw(SkCanvas * canvas)53 void onDraw(SkCanvas* canvas) override {
54 SkTDArray<SkMatrix> matrices;
55 matrices.append()->setAll(1.f, 0.f, 0.f,
56 0.f, 1.f, 0.f,
57 0.f, 0.005f, 1.f);
58 matrices.append()->setAll(1.f, 0.f, 0.f,
59 0.f, 1.f, 0.f,
60 0.007f, -0.005f, 1.f);
61 matrices[1].preSkew(0.2f, -0.1f);
62 matrices[1].preRotate(-65.f);
63 matrices[1].preScale(1.2f, .8f);
64 matrices[1].postTranslate(0.f, 60.f);
65 SkPaint paint;
66 int n = 0;
67 SkRect bounds = SkRect::MakeEmpty();
68 for (const auto& img : fImages) {
69 SkRect imgB = SkRect::MakeWH(img->width(), img->height());
70 for (const auto& m : matrices) {
71 SkRect temp;
72 m.mapRect(&temp, imgB);
73 bounds.join(temp);
74 }
75 }
76 canvas->translate(-bounds.fLeft + 10.f, -bounds.fTop + 10.f);
77 canvas->save();
78 enum class DrawType {
79 kDrawImage,
80 kDrawImageRectStrict,
81 kDrawImageRectFast,
82 };
83 for (auto type :
84 {DrawType::kDrawImage, DrawType::kDrawImageRectStrict, DrawType::kDrawImageRectFast}) {
85 for (const auto& m : matrices) {
86 for (auto aa : {false, true}) {
87 paint.setAntiAlias(aa);
88 for (auto sampling : {
89 SkSamplingOptions(SkFilterMode::kNearest),
90 SkSamplingOptions(SkFilterMode::kLinear),
91 SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kLinear),
92 SkSamplingOptions(SkCubicResampler::Mitchell())}) {
93 for (const auto& origImage : fImages) {
94 sk_sp<SkImage> img = ToolUtils::MakeTextureImage(canvas, origImage);
95 if (img) {
96 canvas->save();
97 canvas->concat(m);
98 SkRect src = { img->width() / 4.f, img->height() / 4.f,
99 3.f * img->width() / 4.f, 3.f * img->height() / 4 };
100 SkRect dst = { 0, 0,
101 3.f / 4.f * img->width(), 3.f / 4.f * img->height()};
102 switch (type) {
103 case DrawType::kDrawImage:
104 canvas->drawImage(img, 0, 0, sampling, &paint);
105 break;
106 case DrawType::kDrawImageRectStrict:
107 canvas->drawImageRect(img, src, dst, sampling, &paint,
108 SkCanvas::kStrict_SrcRectConstraint);
109 break;
110 case DrawType::kDrawImageRectFast:
111 canvas->drawImageRect(img, src, dst, sampling, &paint,
112 SkCanvas::kFast_SrcRectConstraint);
113 break;
114 }
115 canvas->restore();
116 }
117 ++n;
118 if (n < 8) {
119 canvas->translate(bounds.width() + 10.f, 0);
120 } else {
121 canvas->restore();
122 canvas->translate(0, bounds.height() + 10.f);
123 canvas->save();
124 n = 0;
125 }
126 }
127 }
128 }
129 }
130 }
131 canvas->restore();
132 }
133
134 private:
135 inline static constexpr int kNumImages = 4;
136 TArray<sk_sp<SkImage>> fImages;
137
138 using INHERITED = GM;
139 };
140
141 //////////////////////////////////////////////////////////////////////////////
142
143 DEF_GM(return new PerspImages();)
144
145 } // namespace skiagm
146
