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 SkImage* (*ImageMakerProc)(GrContext*, const SkPicture*, const SkImageInfo&);
28
make_raster(GrContext *,const SkPicture * pic,const SkImageInfo & info)29 static SkImage* make_raster(GrContext*, const SkPicture* pic, const SkImageInfo& info) {
30 SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info));
31 surface->getCanvas()->clear(0);
32 surface->getCanvas()->drawPicture(pic);
33 return surface->newImageSnapshot();
34 }
35
make_texture(GrContext * ctx,const SkPicture * pic,const SkImageInfo & info)36 static SkImage* make_texture(GrContext* ctx, const SkPicture* pic, const SkImageInfo& info) {
37 if (!ctx) {
38 return nullptr;
39 }
40 SkAutoTUnref<SkSurface> surface(SkSurface::NewRenderTarget(ctx, SkBudgeted::kNo,
41 info, 0));
42 surface->getCanvas()->clear(0);
43 surface->getCanvas()->drawPicture(pic);
44 return surface->newImageSnapshot();
45 }
46
make_pict_gen(GrContext *,const SkPicture * pic,const SkImageInfo & info)47 static SkImage* make_pict_gen(GrContext*, const SkPicture* pic, const SkImageInfo& info) {
48 return SkImage::NewFromPicture(pic, info.dimensions(), nullptr, nullptr);
49 }
50
make_encode_gen(GrContext * ctx,const SkPicture * pic,const SkImageInfo & info)51 static SkImage* make_encode_gen(GrContext* ctx, const SkPicture* pic, const SkImageInfo& info) {
52 SkAutoTUnref<SkImage> src(make_raster(ctx, pic, info));
53 if (!src) {
54 return nullptr;
55 }
56 SkAutoTUnref<SkData> encoded(src->encode(SkImageEncoder::kPNG_Type, 100));
57 if (!encoded) {
58 return nullptr;
59 }
60 return SkImage::NewFromEncoded(encoded);
61 }
62
63 const ImageMakerProc gProcs[] = {
64 make_raster,
65 make_texture,
66 make_pict_gen,
67 make_encode_gen,
68 };
69
70 /*
71 * Exercise drawing pictures inside an image, showing that the image version is pixelated
72 * (correctly) when it is inside an image.
73 */
74 class ImageShaderGM : public skiagm::GM {
75 SkAutoTUnref<SkPicture> fPicture;
76
77 public:
ImageShaderGM()78 ImageShaderGM() {}
79
80 protected:
onShortName()81 SkString onShortName() override {
82 return SkString("image-shader");
83 }
84
onISize()85 SkISize onISize() override {
86 return SkISize::Make(850, 450);
87 }
88
onOnceBeforeDraw()89 void onOnceBeforeDraw() override {
90 const SkRect bounds = SkRect::MakeWH(100, 100);
91 SkPictureRecorder recorder;
92 draw_something(recorder.beginRecording(bounds), bounds);
93 fPicture.reset(recorder.endRecording());
94 }
95
testImage(SkCanvas * canvas,SkImage * image)96 void testImage(SkCanvas* canvas, SkImage* image) {
97 SkAutoCanvasRestore acr(canvas, true);
98
99 canvas->drawImage(image, 0, 0);
100 canvas->translate(0, 120);
101
102 const SkShader::TileMode tile = SkShader::kRepeat_TileMode;
103 const SkMatrix localM = SkMatrix::MakeTrans(-50, -50);
104 SkAutoTUnref<SkShader> shader(image->newShader(tile, tile, &localM));
105 SkPaint paint;
106 paint.setAntiAlias(true);
107 paint.setShader(shader);
108 canvas->drawCircle(50, 50, 50, paint);
109 }
110
onDraw(SkCanvas * canvas)111 void onDraw(SkCanvas* canvas) override {
112 canvas->translate(20, 20);
113
114 const SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);
115
116 for (size_t i = 0; i < SK_ARRAY_COUNT(gProcs); ++i) {
117 SkAutoTUnref<SkImage> image(gProcs[i](canvas->getGrContext(), fPicture, info));
118 if (image) {
119 this->testImage(canvas, image);
120 }
121 canvas->translate(120, 0);
122 }
123 }
124
125 private:
126 typedef skiagm::GM INHERITED;
127 };
128 DEF_GM( return new ImageShaderGM; )
129
130