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      1 /*
      2  * Copyright 2012 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 "SkGradientShader.h"
     11 #include "SkPath.h"
     12 #include "SkPictureRecorder.h"
     13 #include "SkSurface.h"
     14 
     15 static void draw(SkCanvas* canvas, int width, int height, SkColor colors[2]) {
     16     const SkPoint center = { SkIntToScalar(width)/2, SkIntToScalar(height)/2 };
     17     const SkScalar radius = 40;
     18     SkPaint paint;
     19     paint.setShader(SkGradientShader::MakeRadial(center, radius, colors, nullptr, 2,
     20                                                  SkShader::kMirror_TileMode));
     21     paint.setBlendMode(SkBlendMode::kSrc);
     22     canvas->drawPaint(paint);
     23 }
     24 
     25 static sk_sp<SkImage> make_raster_image(int width, int height, SkColor colors[2]) {
     26     auto surface(SkSurface::MakeRasterN32Premul(width, height));
     27     draw(surface->getCanvas(), width, height, colors);
     28     return surface->makeImageSnapshot();
     29 }
     30 
     31 static sk_sp<SkImage> make_picture_image(int width, int height, SkColor colors[2]) {
     32     SkPictureRecorder recorder;
     33     draw(recorder.beginRecording(SkRect::MakeIWH(width, height)), width, height, colors);
     34     return SkImage::MakeFromPicture(recorder.finishRecordingAsPicture(),
     35                                     SkISize::Make(width, height), nullptr, nullptr,
     36                                     SkImage::BitDepth::kU8,
     37                                     SkColorSpace::MakeSRGB());
     38 }
     39 
     40 typedef sk_sp<SkImage> (*ImageMakerProc)(int width, int height, SkColor colors[2]);
     41 
     42 static void show_image(SkCanvas* canvas, int width, int height, SkColor colors[2],
     43                        ImageMakerProc proc) {
     44     sk_sp<SkImage> image(proc(width, height, colors));
     45 
     46     SkPaint borderPaint;
     47 
     48     borderPaint.setStyle(SkPaint::kStroke_Style);
     49 
     50     SkRect dstRect = SkRect::MakeWH(128.f, 128.f);
     51 
     52     canvas->save();
     53     canvas->clipRect(dstRect);
     54     canvas->drawImage(image, 0, 0, nullptr);
     55     canvas->restore();
     56     canvas->drawRect(dstRect, borderPaint);
     57 
     58     dstRect.offset(SkIntToScalar(150), 0);
     59     int hw = width / 2;
     60     int hh = height / 2;
     61     SkIRect subset = SkIRect::MakeLTRB(hw - 64, hh - 32, hw + 64, hh + 32);
     62     canvas->drawImageRect(image, subset, dstRect, nullptr);
     63     canvas->drawRect(dstRect, borderPaint);
     64 
     65     dstRect.offset(SkIntToScalar(150), 0);
     66     canvas->drawImageRect(image, dstRect, nullptr);
     67     canvas->drawRect(dstRect, borderPaint);
     68 }
     69 
     70 class VeryLargeBitmapGM : public skiagm::GM {
     71     ImageMakerProc  fProc;
     72     SkString        fName;
     73 
     74 public:
     75     VeryLargeBitmapGM(ImageMakerProc proc, const char suffix[]) : fProc(proc) {
     76         fName.printf("verylarge%s", suffix);
     77     }
     78 
     79 protected:
     80     SkString onShortName() override {
     81         return fName;
     82     }
     83 
     84     SkISize onISize() override {
     85         return SkISize::Make(500, 600);
     86     }
     87 
     88     void onDraw(SkCanvas* canvas) override {
     89         int veryBig = 65*1024; // 64K < size
     90         int big = 33*1024;     // 32K < size < 64K
     91         // smaller than many max texture sizes, but large enough to gpu-tile for memory reasons.
     92         int medium = 5*1024;
     93         int small = 150;
     94 
     95         SkColor colors[2];
     96 
     97         canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
     98         colors[0] = SK_ColorRED;
     99         colors[1] = SK_ColorGREEN;
    100         show_image(canvas, small, small, colors, fProc);
    101         canvas->translate(0, SkIntToScalar(150));
    102 
    103         colors[0] = SK_ColorBLUE;
    104         colors[1] = SK_ColorMAGENTA;
    105         show_image(canvas, big, small, colors, fProc);
    106         canvas->translate(0, SkIntToScalar(150));
    107 
    108         colors[0] = SK_ColorMAGENTA;
    109         colors[1] = SK_ColorYELLOW;
    110         show_image(canvas, medium, medium, colors, fProc);
    111         canvas->translate(0, SkIntToScalar(150));
    112 
    113         colors[0] = SK_ColorGREEN;
    114         colors[1] = SK_ColorYELLOW;
    115         // as of this writing, the raster code will fail to draw the scaled version
    116         // since it has a 64K limit on x,y coordinates... (but gpu should succeed)
    117         show_image(canvas, veryBig, small, colors, fProc);
    118     }
    119 
    120 private:
    121     typedef skiagm::GM INHERITED;
    122 };
    123 DEF_GM( return new VeryLargeBitmapGM(make_raster_image, "bitmap"); )
    124 DEF_GM( return new VeryLargeBitmapGM(make_picture_image, "_picture_image"); )
    125