gm/verylargebitmap.cpp

   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"); )