tomhudson@google.com | ef279d3 | 2011-12-21 14:27:14 +0000 | [diff] [blame] | 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.h" |
| 9 | #include "SkCanvas.h" |
| 10 | #include "SkPath.h" |
| 11 | |
| 12 | namespace skiagm { |
| 13 | |
| 14 | /** Draw a 2px border around the target, then red behind the target; |
| 15 | set the clip to match the target, then draw >> the target in blue. |
| 16 | */ |
| 17 | |
| 18 | void draw (SkCanvas* canvas, SkRect& target, int x, int y) { |
| 19 | SkPaint borderPaint; |
| 20 | borderPaint.setColor(SkColorSetRGB(0x0, 0xDD, 0x0)); |
| 21 | borderPaint.setAntiAlias(true); |
| 22 | SkPaint backgroundPaint; |
| 23 | backgroundPaint.setColor(SkColorSetRGB(0xDD, 0x0, 0x0)); |
| 24 | backgroundPaint.setAntiAlias(true); |
| 25 | SkPaint foregroundPaint; |
| 26 | foregroundPaint.setColor(SkColorSetRGB(0x0, 0x0, 0xDD)); |
| 27 | foregroundPaint.setAntiAlias(true); |
| 28 | |
| 29 | canvas->save(); |
tomhudson@google.com | abfa8d1 | 2011-12-28 19:40:48 +0000 | [diff] [blame] | 30 | canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); |
| 31 | target.inset(SkIntToScalar(-2), SkIntToScalar(-2)); |
tomhudson@google.com | ef279d3 | 2011-12-21 14:27:14 +0000 | [diff] [blame] | 32 | canvas->drawRect(target, borderPaint); |
tomhudson@google.com | abfa8d1 | 2011-12-28 19:40:48 +0000 | [diff] [blame] | 33 | target.inset(SkIntToScalar(2), SkIntToScalar(2)); |
tomhudson@google.com | ef279d3 | 2011-12-21 14:27:14 +0000 | [diff] [blame] | 34 | canvas->drawRect(target, backgroundPaint); |
| 35 | canvas->clipRect(target, SkRegion::kIntersect_Op, true); |
tomhudson@google.com | abfa8d1 | 2011-12-28 19:40:48 +0000 | [diff] [blame] | 36 | target.inset(SkIntToScalar(-4), SkIntToScalar(-4)); |
tomhudson@google.com | ef279d3 | 2011-12-21 14:27:14 +0000 | [diff] [blame] | 37 | canvas->drawRect(target, foregroundPaint); |
| 38 | canvas->restore(); |
| 39 | } |
| 40 | |
| 41 | void draw_square (SkCanvas* canvas, int x, int y) { |
| 42 | SkRect target (SkRect::MakeWH(10 * SK_Scalar1, 10 * SK_Scalar1)); |
| 43 | draw(canvas, target, x, y); |
| 44 | } |
| 45 | |
| 46 | void draw_column (SkCanvas* canvas, int x, int y) { |
| 47 | SkRect target (SkRect::MakeWH(1 * SK_Scalar1, 10 * SK_Scalar1)); |
| 48 | draw(canvas, target, x, y); |
| 49 | } |
| 50 | |
| 51 | void draw_bar (SkCanvas* canvas, int x, int y) { |
| 52 | SkRect target (SkRect::MakeWH(10 * SK_Scalar1, 1 * SK_Scalar1)); |
| 53 | draw(canvas, target, x, y); |
| 54 | } |
| 55 | |
| 56 | void draw_rect_tests (SkCanvas* canvas) { |
| 57 | draw_square(canvas, 10, 10); |
| 58 | draw_column(canvas, 30, 10); |
| 59 | draw_bar(canvas, 10, 30); |
| 60 | } |
| 61 | |
| 62 | /** |
| 63 | Test a set of clipping problems discovered while writing blitAntiRect, |
| 64 | and test all the code paths through the clipping blitters. |
| 65 | Each region should show as a blue center surrounded by a 2px green |
| 66 | border, with no red. |
| 67 | */ |
| 68 | |
| 69 | class AAClipGM : public GM { |
| 70 | public: |
| 71 | AAClipGM() { |
| 72 | |
| 73 | } |
| 74 | |
| 75 | protected: |
| 76 | virtual SkString onShortName() { |
| 77 | return SkString("aaclip"); |
| 78 | } |
| 79 | |
| 80 | virtual SkISize onISize() { |
| 81 | return make_isize(640, 480); |
| 82 | } |
| 83 | |
| 84 | virtual void onDraw(SkCanvas* canvas) { |
| 85 | // Initial pixel-boundary-aligned draw |
| 86 | draw_rect_tests(canvas); |
| 87 | |
| 88 | // Repeat 4x with .2, .4, .6, .8 px offsets |
| 89 | canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5); |
tomhudson@google.com | abfa8d1 | 2011-12-28 19:40:48 +0000 | [diff] [blame] | 90 | canvas->translate(SkIntToScalar(50), 0); |
tomhudson@google.com | ef279d3 | 2011-12-21 14:27:14 +0000 | [diff] [blame] | 91 | draw_rect_tests(canvas); |
| 92 | |
| 93 | canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5); |
tomhudson@google.com | abfa8d1 | 2011-12-28 19:40:48 +0000 | [diff] [blame] | 94 | canvas->translate(SkIntToScalar(50), 0); |
tomhudson@google.com | ef279d3 | 2011-12-21 14:27:14 +0000 | [diff] [blame] | 95 | draw_rect_tests(canvas); |
| 96 | |
| 97 | canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5); |
tomhudson@google.com | abfa8d1 | 2011-12-28 19:40:48 +0000 | [diff] [blame] | 98 | canvas->translate(SkIntToScalar(50), 0); |
tomhudson@google.com | ef279d3 | 2011-12-21 14:27:14 +0000 | [diff] [blame] | 99 | draw_rect_tests(canvas); |
| 100 | |
| 101 | canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5); |
tomhudson@google.com | abfa8d1 | 2011-12-28 19:40:48 +0000 | [diff] [blame] | 102 | canvas->translate(SkIntToScalar(50), 0); |
tomhudson@google.com | ef279d3 | 2011-12-21 14:27:14 +0000 | [diff] [blame] | 103 | draw_rect_tests(canvas); |
| 104 | } |
| 105 | |
| 106 | private: |
| 107 | typedef GM INHERITED; |
| 108 | }; |
| 109 | |
| 110 | ////////////////////////////////////////////////////////////////////////////// |
| 111 | |
| 112 | static GM* MyFactory(void*) { return new AAClipGM; } |
| 113 | static GMRegistry reg(MyFactory); |
| 114 | |
| 115 | } |