1 /*
2 * Copyright 2011 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/SkBitmap.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkMatrix.h"
12 #include "include/core/SkPaint.h"
13 #include "include/core/SkRect.h"
14 #include "include/core/SkScalar.h"
15 #include "include/core/SkSize.h"
16 #include "include/core/SkString.h"
17 #include "include/core/SkTypes.h"
18 #include "tools/DecodeUtils.h"
19 #include "tools/Resources.h"
20 #include "tools/ToolUtils.h"
21
22 namespace {
computeSize(const SkBitmap & bm,const SkMatrix & mat)23 static SkSize computeSize(const SkBitmap& bm, const SkMatrix& mat) {
24 SkRect bounds = SkRect::MakeWH(SkIntToScalar(bm.width()),
25 SkIntToScalar(bm.height()));
26 mat.mapRect(&bounds);
27 return SkSize::Make(bounds.width(), bounds.height());
28 }
29
draw_cell(SkCanvas * canvas,const SkBitmap & bm,const SkMatrix & mat,SkScalar dx,const SkSamplingOptions & sampling)30 static void draw_cell(SkCanvas* canvas, const SkBitmap& bm, const SkMatrix& mat, SkScalar dx,
31 const SkSamplingOptions& sampling) {
32 SkAutoCanvasRestore acr(canvas, true);
33
34 canvas->translate(dx, 0);
35 canvas->concat(mat);
36 canvas->drawImage(bm.asImage(), 0, 0, sampling);
37 }
38
draw_row(SkCanvas * canvas,const SkBitmap & bm,const SkMatrix & mat,SkScalar dx)39 static void draw_row(SkCanvas* canvas, const SkBitmap& bm, const SkMatrix& mat, SkScalar dx) {
40 draw_cell(canvas, bm, mat, 0 * dx, SkSamplingOptions());
41 draw_cell(canvas, bm, mat, 1 * dx, SkSamplingOptions(SkFilterMode::kLinear));
42 draw_cell(canvas, bm, mat, 2 * dx, SkSamplingOptions(SkFilterMode::kLinear,
43 SkMipmapMode::kLinear));
44 draw_cell(canvas, bm, mat, 3 * dx, SkSamplingOptions(SkCubicResampler::Mitchell()));
45 }
46
47 class FilterIndiaBoxGM : public skiagm::GM {
48 SkBitmap fBM;
49 SkMatrix fMatrix[2];
50
onOnceBeforeDraw()51 void onOnceBeforeDraw() override {
52 constexpr char kResource[] = "images/box.gif";
53 if (!ToolUtils::GetResourceAsBitmap(kResource, &fBM)) {
54 fBM.allocN32Pixels(1, 1);
55 fBM.eraseARGB(255, 255, 0 , 0); // red == bad
56 }
57 fBM.setImmutable();
58
59 SkScalar cx = SkScalarHalf(fBM.width());
60 SkScalar cy = SkScalarHalf(fBM.height());
61
62 float vertScale = 30.0f/55.0f;
63 float horizScale = 150.0f/200.0f;
64
65 fMatrix[0].setScale(horizScale, vertScale);
66 fMatrix[1].setRotate(30, cx, cy); fMatrix[1].postScale(horizScale, vertScale);
67 }
68
getName() const69 SkString getName() const override { return SkString("filterindiabox"); }
70
getISize()71 SkISize getISize() override { return {680, 130}; }
72
onDraw(SkCanvas * canvas)73 void onDraw(SkCanvas* canvas) override {
74 canvas->translate(10, 10);
75 for (size_t i = 0; i < std::size(fMatrix); ++i) {
76 SkSize size = computeSize(fBM, fMatrix[i]);
77 size.fWidth += 20;
78 size.fHeight += 20;
79
80 draw_row(canvas, fBM, fMatrix[i], size.fWidth);
81 canvas->translate(0, size.fHeight);
82 }
83 }
84 };
85 } // namespace
86
87 DEF_GM( return new FilterIndiaBoxGM(); )
88
