1 /*
2 * Copyright 2015 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.h"
9 #include "SkCanvas.h"
10 #include "SkData.h"
11 #include "SkImage.h"
12 #include "SkPictureRecorder.h"
13 #include "SkSurface.h"
14
draw_something(SkCanvas * canvas,const SkRect & bounds)15 static void draw_something(SkCanvas* canvas, const SkRect& bounds) {
16 SkPaint paint;
17 paint.setAntiAlias(true);
18 paint.setColor(SK_ColorRED);
19 paint.setStyle(SkPaint::kStroke_Style);
20 paint.setStrokeWidth(10);
21 canvas->drawRect(bounds, paint);
22 paint.setStyle(SkPaint::kFill_Style);
23 paint.setColor(SK_ColorBLUE);
24 canvas->drawOval(bounds, paint);
25 }
26
27 typedef sk_sp<SkImage> (*ImageMakerProc)(GrContext*, SkPicture*, const SkImageInfo&);
28
make_raster(GrContext *,SkPicture * pic,const SkImageInfo & info)29 static sk_sp<SkImage> make_raster(GrContext*, SkPicture* pic, const SkImageInfo& info) {
30 auto surface(SkSurface::MakeRaster(info));
31 surface->getCanvas()->clear(0);
32 surface->getCanvas()->drawPicture(pic);
33 return surface->makeImageSnapshot();
34 }
35
make_texture(GrContext * ctx,SkPicture * pic,const SkImageInfo & info)36 static sk_sp<SkImage> make_texture(GrContext* ctx, SkPicture* pic, const SkImageInfo& info) {
37 if (!ctx) {
38 return nullptr;
39 }
40 auto surface(SkSurface::MakeRenderTarget(ctx, SkBudgeted::kNo, info));
41 if (!surface) {
42 return nullptr;
43 }
44 surface->getCanvas()->clear(0);
45 surface->getCanvas()->drawPicture(pic);
46 return surface->makeImageSnapshot();
47 }
48
make_pict_gen(GrContext *,SkPicture * pic,const SkImageInfo & info)49 static sk_sp<SkImage> make_pict_gen(GrContext*, SkPicture* pic, const SkImageInfo& info) {
50 return SkImage::MakeFromPicture(sk_ref_sp(pic), info.dimensions(), nullptr, nullptr,
51 SkImage::BitDepth::kU8,
52 SkColorSpace::MakeSRGB());
53 }
54
make_encode_gen(GrContext * ctx,SkPicture * pic,const SkImageInfo & info)55 static sk_sp<SkImage> make_encode_gen(GrContext* ctx, SkPicture* pic, const SkImageInfo& info) {
56 sk_sp<SkImage> src(make_raster(ctx, pic, info));
57 if (!src) {
58 return nullptr;
59 }
60 sk_sp<SkData> encoded = src->encodeToData(SkEncodedImageFormat::kPNG, 100);
61 if (!encoded) {
62 return nullptr;
63 }
64 return SkImage::MakeFromEncoded(std::move(encoded));
65 }
66
67 const ImageMakerProc gProcs[] = {
68 make_raster,
69 make_texture,
70 make_pict_gen,
71 make_encode_gen,
72 };
73
74 /*
75 * Exercise drawing pictures inside an image, showing that the image version is pixelated
76 * (correctly) when it is inside an image.
77 */
78 class ImageShaderGM : public skiagm::GM {
79 sk_sp<SkPicture> fPicture;
80
81 public:
ImageShaderGM()82 ImageShaderGM() {}
83
84 protected:
onShortName()85 SkString onShortName() override {
86 return SkString("image-shader");
87 }
88
onISize()89 SkISize onISize() override {
90 return SkISize::Make(850, 450);
91 }
92
onOnceBeforeDraw()93 void onOnceBeforeDraw() override {
94 const SkRect bounds = SkRect::MakeWH(100, 100);
95 SkPictureRecorder recorder;
96 draw_something(recorder.beginRecording(bounds), bounds);
97 fPicture = recorder.finishRecordingAsPicture();
98 }
99
testImage(SkCanvas * canvas,SkImage * image)100 void testImage(SkCanvas* canvas, SkImage* image) {
101 SkAutoCanvasRestore acr(canvas, true);
102
103 canvas->drawImage(image, 0, 0);
104 canvas->translate(0, 120);
105
106 const SkShader::TileMode tile = SkShader::kRepeat_TileMode;
107 const SkMatrix localM = SkMatrix::MakeTrans(-50, -50);
108 SkPaint paint;
109 paint.setShader(image->makeShader(tile, tile, &localM));
110 paint.setAntiAlias(true);
111 canvas->drawCircle(50, 50, 50, paint);
112 }
113
onDraw(SkCanvas * canvas)114 void onDraw(SkCanvas* canvas) override {
115 canvas->translate(20, 20);
116
117 const SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);
118
119 for (size_t i = 0; i < SK_ARRAY_COUNT(gProcs); ++i) {
120 sk_sp<SkImage> image(gProcs[i](canvas->getGrContext(), fPicture.get(), info));
121 if (image) {
122 this->testImage(canvas, image.get());
123 }
124 canvas->translate(120, 0);
125 }
126 }
127
128 private:
129 typedef skiagm::GM INHERITED;
130 };
131 DEF_GM( return new ImageShaderGM; )
132