epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Copyright 2011 Google Inc. |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
halcanary | b0cce2c | 2015-01-26 12:49:00 -0800 | [diff] [blame] | 8 | #include "sk_tool_utils.h" |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 9 | #include "SampleCode.h" |
| 10 | #include "SkView.h" |
| 11 | #include "SkCanvas.h" |
| 12 | #include "SkColorFilter.h" |
| 13 | #include "SkDevice.h" |
| 14 | #include "SkPaint.h" |
| 15 | #include "SkShader.h" |
| 16 | |
reed@google.com | 79b3b7e | 2011-05-18 13:07:22 +0000 | [diff] [blame] | 17 | static int inflate5To8(int x) { |
| 18 | return (x << 3) | (x >> 2); |
| 19 | } |
| 20 | |
| 21 | static int trunc5(int x) { |
| 22 | return x >> 3; |
| 23 | } |
| 24 | |
| 25 | #define SK_R16_BITS 5 |
| 26 | |
humper@google.com | 0e51577 | 2013-01-07 19:54:40 +0000 | [diff] [blame] | 27 | #ifdef SK_DEBUG |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 28 | static int round5_slow(int x) { |
reed@google.com | 79b3b7e | 2011-05-18 13:07:22 +0000 | [diff] [blame] | 29 | int orig = x & 7; |
| 30 | int fake = x >> 5; |
| 31 | int trunc = x >> 3; |
| 32 | |
| 33 | int diff = fake - orig; |
| 34 | |
| 35 | int bias = 0; |
| 36 | if (diff > 4) { |
| 37 | bias = -1; |
| 38 | } else if (diff < -4) { |
| 39 | bias = 1; |
| 40 | } |
| 41 | return trunc + bias; |
| 42 | } |
humper@google.com | 0e51577 | 2013-01-07 19:54:40 +0000 | [diff] [blame] | 43 | #endif |
reed@google.com | 79b3b7e | 2011-05-18 13:07:22 +0000 | [diff] [blame] | 44 | |
| 45 | static int round5_fast(int x) { |
| 46 | int result = x + 3 - (x >> 5) + (x >> 7); |
| 47 | result >>= 3; |
humper@google.com | 0e51577 | 2013-01-07 19:54:40 +0000 | [diff] [blame] | 48 | #ifdef SK_DEBUG |
reed@google.com | 79b3b7e | 2011-05-18 13:07:22 +0000 | [diff] [blame] | 49 | { |
| 50 | int r2 = round5_slow(x); |
| 51 | SkASSERT(r2 == result); |
| 52 | } |
humper@google.com | 0e51577 | 2013-01-07 19:54:40 +0000 | [diff] [blame] | 53 | #endif |
reed@google.com | 79b3b7e | 2011-05-18 13:07:22 +0000 | [diff] [blame] | 54 | return result; |
| 55 | } |
| 56 | |
| 57 | static void test_5bits() { |
| 58 | int e0 = 0; |
| 59 | int e1 = 0; |
| 60 | int e2 = 0; |
| 61 | int ae0 = 0; |
| 62 | int ae1 = 0; |
| 63 | int ae2 = 0; |
| 64 | for (int i = 0; i < 256; i++) { |
| 65 | int t0 = trunc5(i); |
| 66 | int t1 = round5_fast(i); |
| 67 | int t2 = trunc5(i); |
| 68 | int v0 = inflate5To8(t0); |
| 69 | int v1 = inflate5To8(t1); |
| 70 | int v2 = inflate5To8(t2); |
| 71 | int err0 = i - v0; |
| 72 | int err1 = i - v1; |
| 73 | int err2 = i - v2; |
| 74 | SkDebugf("--- %3d : trunc=%3d (%2d) round:%3d (%2d) \n"/*new:%d (%2d)\n"*/, i, |
| 75 | v0, err0, v1, err1, v2, err2); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 76 | |
reed@google.com | 79b3b7e | 2011-05-18 13:07:22 +0000 | [diff] [blame] | 77 | |
| 78 | e0 += err0; |
| 79 | e1 += err1; |
| 80 | e2 += err2; |
| 81 | ae0 += SkAbs32(err0); |
| 82 | ae1 += SkAbs32(err1); |
| 83 | ae2 += SkAbs32(err2); |
| 84 | } |
| 85 | SkDebugf("--- trunc: %d %d round: %d %d new: %d %d\n", e0, ae0, e1, ae1, e2, ae2); |
| 86 | } |
| 87 | |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 88 | static SkBitmap createBitmap(int n) { |
| 89 | SkBitmap bitmap; |
commit-bot@chromium.org | a8c1831 | 2014-02-17 02:55:57 +0000 | [diff] [blame] | 90 | bitmap.allocN32Pixels(n, n); |
junov@google.com | dbfac8a | 2012-12-06 21:47:40 +0000 | [diff] [blame] | 91 | bitmap.eraseColor(SK_ColorTRANSPARENT); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 92 | |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 93 | SkCanvas canvas(bitmap); |
| 94 | SkRect r; |
| 95 | r.set(0, 0, SkIntToScalar(n), SkIntToScalar(n)); |
| 96 | r.inset(SK_Scalar1, SK_Scalar1); |
| 97 | |
| 98 | SkPaint paint; |
| 99 | paint.setAntiAlias(true); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 100 | |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 101 | paint.setColor(SK_ColorRED); |
| 102 | canvas.drawOval(r, paint); |
| 103 | |
| 104 | r.inset(SK_Scalar1*n/4, SK_Scalar1*n/4); |
| 105 | paint.setXfermodeMode(SkXfermode::kSrc_Mode); |
| 106 | paint.setColor(0x800000FF); |
| 107 | canvas.drawOval(r, paint); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 108 | |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 109 | return bitmap; |
| 110 | } |
| 111 | |
| 112 | class ColorFilterView : public SampleView { |
| 113 | SkBitmap fBitmap; |
| 114 | SkShader* fShader; |
| 115 | enum { |
| 116 | N = 64 |
| 117 | }; |
| 118 | public: |
| 119 | ColorFilterView() { |
| 120 | fBitmap = createBitmap(N); |
halcanary | b0cce2c | 2015-01-26 12:49:00 -0800 | [diff] [blame] | 121 | fShader = sk_tool_utils::create_checkerboard_shader( |
halcanary | 878fa02 | 2015-01-26 11:24:32 -0800 | [diff] [blame] | 122 | 0xFFCCCCCC, 0xFFFFFFFF, 12); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 123 | |
caryclark@google.com | 02939ce | 2012-06-06 12:09:51 +0000 | [diff] [blame] | 124 | if (false) { // avoid bit rot, suppress warning |
| 125 | test_5bits(); |
| 126 | } |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | virtual ~ColorFilterView() { |
| 130 | fShader->unref(); |
| 131 | } |
| 132 | |
| 133 | protected: |
| 134 | // overrides from SkEventSink |
| 135 | virtual bool onQuery(SkEvent* evt) { |
| 136 | if (SampleCode::TitleQ(*evt)) { |
| 137 | SampleCode::TitleR(evt, "ColorFilter"); |
| 138 | return true; |
| 139 | } |
| 140 | return this->INHERITED::onQuery(evt); |
| 141 | } |
| 142 | |
| 143 | virtual void onDrawBackground(SkCanvas* canvas) { |
| 144 | SkPaint paint; |
| 145 | paint.setShader(fShader); |
| 146 | canvas->drawPaint(paint); |
| 147 | } |
| 148 | |
| 149 | virtual void onDrawContent(SkCanvas* canvas) { |
| 150 | if (false) { |
| 151 | SkPaint p; |
| 152 | p.setAntiAlias(true); |
| 153 | SkRect r = { 20.4f, 10, 20.6f, 20 }; |
| 154 | canvas->drawRect(r, p); |
| 155 | r.set(30.9f, 10, 31.1f, 20); |
| 156 | canvas->drawRect(r, p); |
| 157 | return; |
| 158 | } |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 159 | |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 160 | static const SkXfermode::Mode gModes[] = { |
Scroggo | 97c88c2 | 2011-05-11 14:05:25 +0000 | [diff] [blame] | 161 | SkXfermode::kClear_Mode, |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 162 | SkXfermode::kSrc_Mode, |
| 163 | SkXfermode::kDst_Mode, |
Scroggo | 97c88c2 | 2011-05-11 14:05:25 +0000 | [diff] [blame] | 164 | SkXfermode::kSrcOver_Mode, |
| 165 | SkXfermode::kDstOver_Mode, |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 166 | SkXfermode::kSrcIn_Mode, |
| 167 | SkXfermode::kDstIn_Mode, |
| 168 | SkXfermode::kSrcOut_Mode, |
| 169 | SkXfermode::kDstOut_Mode, |
| 170 | SkXfermode::kSrcATop_Mode, |
| 171 | SkXfermode::kDstATop_Mode, |
Scroggo | 97c88c2 | 2011-05-11 14:05:25 +0000 | [diff] [blame] | 172 | SkXfermode::kXor_Mode, |
| 173 | SkXfermode::kPlus_Mode, |
reed@google.com | 8d3cd7a | 2013-01-30 21:36:11 +0000 | [diff] [blame] | 174 | SkXfermode::kModulate_Mode, |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 175 | }; |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 176 | |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 177 | static const SkColor gColors[] = { |
| 178 | 0xFF000000, |
| 179 | 0x80000000, |
| 180 | 0xFF00FF00, |
| 181 | 0x8000FF00, |
| 182 | 0x00000000, |
| 183 | }; |
| 184 | |
| 185 | float scale = 1.5f; |
| 186 | SkPaint paint; |
| 187 | canvas->translate(N / 8, N / 8); |
| 188 | |
| 189 | for (size_t y = 0; y < SK_ARRAY_COUNT(gColors); y++) { |
| 190 | for (size_t x = 0; x < SK_ARRAY_COUNT(gModes); x++) { |
| 191 | SkColorFilter* cf = SkColorFilter::CreateModeFilter(gColors[y], gModes[x]); |
| 192 | SkSafeUnref(paint.setColorFilter(cf)); |
| 193 | canvas->drawBitmap(fBitmap, x * N * 1.25f, y * N * scale, &paint); |
| 194 | } |
| 195 | } |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 196 | |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 197 | } |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 198 | |
reed@google.com | 9ac5e22 | 2011-05-05 20:05:10 +0000 | [diff] [blame] | 199 | private: |
| 200 | typedef SampleView INHERITED; |
| 201 | }; |
| 202 | |
| 203 | ////////////////////////////////////////////////////////////////////////////// |
| 204 | |
| 205 | static SkView* MyFactory() { return new ColorFilterView; } |
| 206 | static SkViewRegister reg(MyFactory); |