epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +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 | */ |
halcanary | b0cce2c | 2015-01-26 12:49:00 -0800 | [diff] [blame] | 7 | #include "sk_tool_utils.h" |
Ben Wagner | b2c4ea6 | 2018-08-08 11:36:17 -0400 | [diff] [blame] | 8 | #include "Sample.h" |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 9 | #include "SkCanvas.h" |
| 10 | #include "SkColorFilter.h" |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 11 | #include "SkPaint.h" |
| 12 | #include "SkShader.h" |
| 13 | |
reed@google.com | 79b3b7e | 2011-05-18 13:07:22 +0000 | [diff] [blame] | 14 | static int inflate5To8(int x) { |
| 15 | return (x << 3) | (x >> 2); |
| 16 | } |
| 17 | |
| 18 | static int trunc5(int x) { |
| 19 | return x >> 3; |
| 20 | } |
| 21 | |
| 22 | #define SK_R16_BITS 5 |
| 23 | |
humper@google.com | 0e51577 | 2013-01-07 19:54:40 +0000 | [diff] [blame] | 24 | #ifdef SK_DEBUG |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 25 | static int round5_slow(int x) { |
reed@google.com | 79b3b7e | 2011-05-18 13:07:22 +0000 | [diff] [blame] | 26 | int orig = x & 7; |
| 27 | int fake = x >> 5; |
| 28 | int trunc = x >> 3; |
| 29 | |
| 30 | int diff = fake - orig; |
| 31 | |
| 32 | int bias = 0; |
| 33 | if (diff > 4) { |
| 34 | bias = -1; |
| 35 | } else if (diff < -4) { |
| 36 | bias = 1; |
| 37 | } |
| 38 | return trunc + bias; |
| 39 | } |
humper@google.com | 0e51577 | 2013-01-07 19:54:40 +0000 | [diff] [blame] | 40 | #endif |
reed@google.com | 79b3b7e | 2011-05-18 13:07:22 +0000 | [diff] [blame] | 41 | |
| 42 | static int round5_fast(int x) { |
| 43 | int result = x + 3 - (x >> 5) + (x >> 7); |
| 44 | result >>= 3; |
humper@google.com | 0e51577 | 2013-01-07 19:54:40 +0000 | [diff] [blame] | 45 | #ifdef SK_DEBUG |
reed@google.com | 79b3b7e | 2011-05-18 13:07:22 +0000 | [diff] [blame] | 46 | { |
| 47 | int r2 = round5_slow(x); |
| 48 | SkASSERT(r2 == result); |
| 49 | } |
humper@google.com | 0e51577 | 2013-01-07 19:54:40 +0000 | [diff] [blame] | 50 | #endif |
reed@google.com | 79b3b7e | 2011-05-18 13:07:22 +0000 | [diff] [blame] | 51 | return result; |
| 52 | } |
| 53 | |
| 54 | static void test_5bits() { |
| 55 | int e0 = 0; |
| 56 | int e1 = 0; |
| 57 | int e2 = 0; |
| 58 | int ae0 = 0; |
| 59 | int ae1 = 0; |
| 60 | int ae2 = 0; |
| 61 | for (int i = 0; i < 256; i++) { |
| 62 | int t0 = trunc5(i); |
| 63 | int t1 = round5_fast(i); |
| 64 | int t2 = trunc5(i); |
| 65 | int v0 = inflate5To8(t0); |
| 66 | int v1 = inflate5To8(t1); |
| 67 | int v2 = inflate5To8(t2); |
| 68 | int err0 = i - v0; |
| 69 | int err1 = i - v1; |
| 70 | int err2 = i - v2; |
| 71 | SkDebugf("--- %3d : trunc=%3d (%2d) round:%3d (%2d) \n"/*new:%d (%2d)\n"*/, i, |
| 72 | v0, err0, v1, err1, v2, err2); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 73 | |
reed@google.com | 79b3b7e | 2011-05-18 13:07:22 +0000 | [diff] [blame] | 74 | |
| 75 | e0 += err0; |
| 76 | e1 += err1; |
| 77 | e2 += err2; |
| 78 | ae0 += SkAbs32(err0); |
| 79 | ae1 += SkAbs32(err1); |
| 80 | ae2 += SkAbs32(err2); |
| 81 | } |
| 82 | SkDebugf("--- trunc: %d %d round: %d %d new: %d %d\n", e0, ae0, e1, ae1, e2, ae2); |
| 83 | } |
| 84 | |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 85 | static SkBitmap createBitmap(int n) { |
| 86 | SkBitmap bitmap; |
commit-bot@chromium.org | a8c1831 | 2014-02-17 02:55:57 +0000 | [diff] [blame] | 87 | bitmap.allocN32Pixels(n, n); |
junov@google.com | dbfac8a | 2012-12-06 21:47:40 +0000 | [diff] [blame] | 88 | bitmap.eraseColor(SK_ColorTRANSPARENT); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 89 | |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 90 | SkCanvas canvas(bitmap); |
| 91 | SkRect r; |
| 92 | r.set(0, 0, SkIntToScalar(n), SkIntToScalar(n)); |
| 93 | r.inset(SK_Scalar1, SK_Scalar1); |
| 94 | |
| 95 | SkPaint paint; |
| 96 | paint.setAntiAlias(true); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 97 | |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 98 | paint.setColor(SK_ColorRED); |
| 99 | canvas.drawOval(r, paint); |
| 100 | |
| 101 | r.inset(SK_Scalar1*n/4, SK_Scalar1*n/4); |
reed | 374772b | 2016-10-05 17:33:02 -0700 | [diff] [blame] | 102 | paint.setBlendMode(SkBlendMode::kSrc); |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 103 | paint.setColor(0x800000FF); |
| 104 | canvas.drawOval(r, paint); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 105 | |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 106 | return bitmap; |
| 107 | } |
| 108 | |
Ben Wagner | b2c4ea6 | 2018-08-08 11:36:17 -0400 | [diff] [blame] | 109 | class ColorFilterView : public Sample { |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 110 | SkBitmap fBitmap; |
reed | 8a21c9f | 2016-03-08 18:50:00 -0800 | [diff] [blame] | 111 | sk_sp<SkShader> fShader; |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 112 | enum { |
| 113 | N = 64 |
| 114 | }; |
Cary Clark | 58627cb | 2018-04-10 09:16:41 -0400 | [diff] [blame] | 115 | |
| 116 | protected: |
| 117 | void onOnceBeforeDraw() override { |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 118 | fBitmap = createBitmap(N); |
halcanary | b0cce2c | 2015-01-26 12:49:00 -0800 | [diff] [blame] | 119 | fShader = sk_tool_utils::create_checkerboard_shader( |
halcanary | 878fa02 | 2015-01-26 11:24:32 -0800 | [diff] [blame] | 120 | 0xFFCCCCCC, 0xFFFFFFFF, 12); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 121 | |
caryclark@google.com | 02939ce | 2012-06-06 12:09:51 +0000 | [diff] [blame] | 122 | if (false) { // avoid bit rot, suppress warning |
| 123 | test_5bits(); |
| 124 | } |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 125 | } |
| 126 | |
Ben Wagner | b2c4ea6 | 2018-08-08 11:36:17 -0400 | [diff] [blame] | 127 | bool onQuery(Sample::Event* evt) override { |
| 128 | if (Sample::TitleQ(*evt)) { |
| 129 | Sample::TitleR(evt, "ColorFilter"); |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 130 | return true; |
| 131 | } |
| 132 | return this->INHERITED::onQuery(evt); |
| 133 | } |
| 134 | |
Cary Clark | 58627cb | 2018-04-10 09:16:41 -0400 | [diff] [blame] | 135 | void onDrawBackground(SkCanvas* canvas) override { |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 136 | SkPaint paint; |
| 137 | paint.setShader(fShader); |
| 138 | canvas->drawPaint(paint); |
| 139 | } |
| 140 | |
Cary Clark | 58627cb | 2018-04-10 09:16:41 -0400 | [diff] [blame] | 141 | void onDrawContent(SkCanvas* canvas) override { |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 142 | if (false) { |
| 143 | SkPaint p; |
| 144 | p.setAntiAlias(true); |
| 145 | SkRect r = { 20.4f, 10, 20.6f, 20 }; |
| 146 | canvas->drawRect(r, p); |
| 147 | r.set(30.9f, 10, 31.1f, 20); |
| 148 | canvas->drawRect(r, p); |
| 149 | return; |
| 150 | } |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 151 | |
Mike Reed | 7d954ad | 2016-10-28 15:42:34 -0400 | [diff] [blame] | 152 | static const SkBlendMode gModes[] = { |
| 153 | SkBlendMode::kClear, |
| 154 | SkBlendMode::kSrc, |
| 155 | SkBlendMode::kDst, |
| 156 | SkBlendMode::kSrcOver, |
| 157 | SkBlendMode::kDstOver, |
| 158 | SkBlendMode::kSrcIn, |
| 159 | SkBlendMode::kDstIn, |
| 160 | SkBlendMode::kSrcOut, |
| 161 | SkBlendMode::kDstOut, |
| 162 | SkBlendMode::kSrcATop, |
| 163 | SkBlendMode::kDstATop, |
| 164 | SkBlendMode::kXor, |
| 165 | SkBlendMode::kPlus, |
| 166 | SkBlendMode::kModulate, |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 167 | }; |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 168 | |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 169 | static const SkColor gColors[] = { |
| 170 | 0xFF000000, |
| 171 | 0x80000000, |
| 172 | 0xFF00FF00, |
| 173 | 0x8000FF00, |
| 174 | 0x00000000, |
| 175 | }; |
| 176 | |
| 177 | float scale = 1.5f; |
| 178 | SkPaint paint; |
| 179 | canvas->translate(N / 8, N / 8); |
| 180 | |
| 181 | for (size_t y = 0; y < SK_ARRAY_COUNT(gColors); y++) { |
| 182 | for (size_t x = 0; x < SK_ARRAY_COUNT(gModes); x++) { |
reed | d053ce9 | 2016-03-22 10:17:23 -0700 | [diff] [blame] | 183 | paint.setColorFilter(SkColorFilter::MakeModeFilter(gColors[y], gModes[x])); |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 184 | canvas->drawBitmap(fBitmap, x * N * 1.25f, y * N * scale, &paint); |
| 185 | } |
| 186 | } |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 187 | |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 188 | } |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 189 | |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 190 | private: |
Ben Wagner | b2c4ea6 | 2018-08-08 11:36:17 -0400 | [diff] [blame] | 191 | typedef Sample INHERITED; |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 192 | }; |
| 193 | |
| 194 | ////////////////////////////////////////////////////////////////////////////// |
| 195 | |
Ben Wagner | b2c4ea6 | 2018-08-08 11:36:17 -0400 | [diff] [blame] | 196 | DEF_SAMPLE( return new ColorFilterView(); ) |