bsalomon@google.com | c698097 | 2011-11-02 19:57:21 +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 | */ |
| 8 | |
| 9 | #include "Test.h" |
| 10 | #include "SkCanvas.h" |
| 11 | #include "SkRegion.h" |
| 12 | #include "SkGpuDevice.h" |
| 13 | |
| 14 | |
| 15 | static const int DEV_W = 100, DEV_H = 100; |
| 16 | static const SkIRect DEV_RECT = SkIRect::MakeWH(DEV_W, DEV_H); |
| 17 | static const SkRect DEV_RECT_S = SkRect::MakeWH(DEV_W * SK_Scalar1, |
| 18 | DEV_H * SK_Scalar1); |
| 19 | |
| 20 | namespace { |
| 21 | SkPMColor getCanvasColor(int x, int y) { |
| 22 | SkASSERT(x >= 0 && x < DEV_W); |
| 23 | SkASSERT(y >= 0 && y < DEV_H); |
| 24 | return SkPackARGB32(0xff, x, y, 0x0); |
| 25 | } |
| 26 | |
| 27 | SkPMColor getBitmapColor(int x, int y, int w, int h) { |
| 28 | int n = y * w + x; |
| 29 | |
| 30 | U8CPU b = n & 0xff; |
| 31 | U8CPU g = (n >> 8) & 0xff; |
| 32 | U8CPU r = (n >> 16) & 0xff; |
| 33 | return SkPackARGB32(0xff, r, g , b); |
| 34 | } |
| 35 | |
| 36 | void fillCanvas(SkCanvas* canvas) { |
| 37 | static SkBitmap bmp; |
| 38 | if (bmp.isNull()) { |
| 39 | bmp.setConfig(SkBitmap::kARGB_8888_Config, DEV_W, DEV_H); |
| 40 | bool alloc = bmp.allocPixels(); |
| 41 | SkASSERT(alloc); |
| 42 | SkAutoLockPixels alp(bmp); |
| 43 | intptr_t pixels = reinterpret_cast<intptr_t>(bmp.getPixels()); |
| 44 | for (int y = 0; y < DEV_H; ++y) { |
| 45 | for (int x = 0; x < DEV_W; ++x) { |
| 46 | SkPMColor* pixel = reinterpret_cast<SkPMColor*>(pixels + y * bmp.rowBytes() + x * bmp.bytesPerPixel()); |
| 47 | *pixel = getCanvasColor(x, y); |
| 48 | } |
| 49 | } |
| 50 | } |
| 51 | canvas->save(); |
| 52 | canvas->setMatrix(SkMatrix::I()); |
| 53 | canvas->clipRect(DEV_RECT_S, SkRegion::kReplace_Op); |
| 54 | SkPaint paint; |
| 55 | paint.setXfermodeMode(SkXfermode::kSrc_Mode); |
| 56 | canvas->drawBitmap(bmp, 0, 0, &paint); |
| 57 | canvas->restore(); |
| 58 | } |
| 59 | |
| 60 | void fillBitmap(SkBitmap* bitmap) { |
| 61 | SkASSERT(bitmap->lockPixelsAreWritable()); |
| 62 | SkAutoLockPixels alp(*bitmap); |
| 63 | int w = bitmap->width(); |
| 64 | int h = bitmap->height(); |
| 65 | intptr_t pixels = reinterpret_cast<intptr_t>(bitmap->getPixels()); |
| 66 | for (int y = 0; y < h; ++y) { |
| 67 | for (int x = 0; x < w; ++x) { |
| 68 | SkPMColor* pixel = reinterpret_cast<SkPMColor*>(pixels + y * bitmap->rowBytes() + x * bitmap->bytesPerPixel()); |
| 69 | *pixel = getBitmapColor(x, y, w, h); |
| 70 | } |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | // checks the bitmap contains correct pixels after the readPixels |
| 75 | // if the bitmap was prefilled with pixels it checks that these weren't |
| 76 | // overwritten in the area outside the readPixels. |
| 77 | bool checkRead(skiatest::Reporter* reporter, |
| 78 | const SkBitmap& bitmap, |
| 79 | int x, int y, |
| 80 | bool preFilledBmp) { |
| 81 | SkASSERT(SkBitmap::kARGB_8888_Config == bitmap.config()); |
| 82 | SkASSERT(!bitmap.isNull()); |
| 83 | |
| 84 | int bw = bitmap.width(); |
| 85 | int bh = bitmap.height(); |
| 86 | |
| 87 | SkIRect srcRect = SkIRect::MakeXYWH(x, y, bw, bh); |
| 88 | SkIRect clippedSrcRect = DEV_RECT; |
| 89 | if (!clippedSrcRect.intersect(srcRect)) { |
| 90 | clippedSrcRect.setEmpty(); |
| 91 | } |
| 92 | |
| 93 | SkAutoLockPixels alp(bitmap); |
| 94 | intptr_t pixels = reinterpret_cast<intptr_t>(bitmap.getPixels()); |
| 95 | for (int by = 0; by < bh; ++by) { |
| 96 | for (int bx = 0; bx < bw; ++bx) { |
| 97 | int devx = bx + srcRect.fLeft; |
| 98 | int devy = by + srcRect.fTop; |
| 99 | |
| 100 | SkPMColor pixel = *reinterpret_cast<SkPMColor*>(pixels + by * bitmap.rowBytes() + bx * bitmap.bytesPerPixel()); |
| 101 | |
| 102 | if (clippedSrcRect.contains(devx, devy)) { |
| 103 | REPORTER_ASSERT(reporter, getCanvasColor(devx, devy) == pixel); |
| 104 | if (getCanvasColor(devx, devy) != pixel) { |
| 105 | return false; |
| 106 | } |
| 107 | } else if (preFilledBmp) { |
| 108 | REPORTER_ASSERT(reporter, getBitmapColor(bx, by, bw, bh) == pixel); |
| 109 | if (getBitmapColor(bx, by, bw, bh) != pixel) { |
| 110 | return false; |
| 111 | } |
| 112 | } |
| 113 | } |
| 114 | } |
| 115 | return true; |
| 116 | } |
| 117 | |
| 118 | enum BitmapInit { |
| 119 | kFirstBitmapInit = 0, |
| 120 | |
| 121 | kNoPixels_BitmapInit = kFirstBitmapInit, |
| 122 | kTight_BitmapInit, |
| 123 | kRowBytes_BitmapInit, |
| 124 | |
| 125 | kBitmapInitCnt |
| 126 | }; |
| 127 | |
| 128 | BitmapInit nextBMI(BitmapInit bmi) { |
| 129 | int x = bmi; |
| 130 | return static_cast<BitmapInit>(++x); |
| 131 | } |
| 132 | |
| 133 | |
| 134 | void init_bitmap(SkBitmap* bitmap, const SkIRect& rect, BitmapInit init) { |
| 135 | int w = rect.width(); |
| 136 | int h = rect.height(); |
| 137 | int rowBytes = 0; |
| 138 | bool alloc = true; |
| 139 | switch (init) { |
| 140 | case kNoPixels_BitmapInit: |
| 141 | alloc = false; |
| 142 | case kTight_BitmapInit: |
| 143 | break; |
| 144 | case kRowBytes_BitmapInit: |
| 145 | rowBytes = w * sizeof(SkPMColor) + 16 * sizeof(SkPMColor); |
| 146 | break; |
| 147 | default: |
| 148 | SkASSERT(0); |
| 149 | break; |
| 150 | } |
| 151 | bitmap->setConfig(SkBitmap::kARGB_8888_Config, w, h, rowBytes); |
| 152 | if (alloc) { |
| 153 | bitmap->allocPixels(); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | void ReadPixelsTest(skiatest::Reporter* reporter, GrContext* context) { |
| 158 | SkCanvas canvas; |
| 159 | |
| 160 | const SkIRect testRects[] = { |
| 161 | // entire thing |
| 162 | DEV_RECT, |
| 163 | // larger on all sides |
| 164 | SkIRect::MakeLTRB(-10, -10, DEV_W + 10, DEV_H + 10), |
| 165 | // fully contained |
| 166 | SkIRect::MakeLTRB(DEV_W / 4, DEV_H / 4, 3 * DEV_W / 4, 3 * DEV_H / 4), |
| 167 | // outside top left |
| 168 | SkIRect::MakeLTRB(-10, -10, -1, -1), |
| 169 | // touching top left corner |
| 170 | SkIRect::MakeLTRB(-10, -10, 0, 0), |
| 171 | // overlapping top left corner |
| 172 | SkIRect::MakeLTRB(-10, -10, DEV_W / 4, DEV_H / 4), |
| 173 | // overlapping top left and top right corners |
| 174 | SkIRect::MakeLTRB(-10, -10, DEV_W + 10, DEV_H / 4), |
| 175 | // touching entire top edge |
| 176 | SkIRect::MakeLTRB(-10, -10, DEV_W + 10, 0), |
| 177 | // overlapping top right corner |
| 178 | SkIRect::MakeLTRB(3 * DEV_W / 4, -10, DEV_W + 10, DEV_H / 4), |
| 179 | // contained in x, overlapping top edge |
| 180 | SkIRect::MakeLTRB(DEV_W / 4, -10, 3 * DEV_W / 4, DEV_H / 4), |
| 181 | // outside top right corner |
| 182 | SkIRect::MakeLTRB(DEV_W + 1, -10, DEV_W + 10, -1), |
| 183 | // touching top right corner |
| 184 | SkIRect::MakeLTRB(DEV_W, -10, DEV_W + 10, 0), |
| 185 | // overlapping top left and bottom left corners |
| 186 | SkIRect::MakeLTRB(-10, -10, DEV_W / 4, DEV_H + 10), |
| 187 | // touching entire left edge |
| 188 | SkIRect::MakeLTRB(-10, -10, 0, DEV_H + 10), |
| 189 | // overlapping bottom left corner |
| 190 | SkIRect::MakeLTRB(-10, 3 * DEV_H / 4, DEV_W / 4, DEV_H + 10), |
| 191 | // contained in y, overlapping left edge |
| 192 | SkIRect::MakeLTRB(-10, DEV_H / 4, DEV_W / 4, 3 * DEV_H / 4), |
| 193 | // outside bottom left corner |
| 194 | SkIRect::MakeLTRB(-10, DEV_H + 1, -1, DEV_H + 10), |
| 195 | // touching bottom left corner |
| 196 | SkIRect::MakeLTRB(-10, DEV_H, 0, DEV_H + 10), |
| 197 | // overlapping bottom left and bottom right corners |
| 198 | SkIRect::MakeLTRB(-10, 3 * DEV_H / 4, DEV_W + 10, DEV_H + 10), |
| 199 | // touching entire left edge |
| 200 | SkIRect::MakeLTRB(0, DEV_H, DEV_W, DEV_H + 10), |
| 201 | // overlapping bottom right corner |
| 202 | SkIRect::MakeLTRB(3 * DEV_W / 4, 3 * DEV_H / 4, DEV_W + 10, DEV_H + 10), |
| 203 | // overlapping top right and bottom right corners |
| 204 | SkIRect::MakeLTRB(3 * DEV_W / 4, -10, DEV_W + 10, DEV_H + 10), |
| 205 | }; |
| 206 | |
| 207 | for (int dtype = 0; dtype < 2; ++dtype) { |
| 208 | |
| 209 | if (0 == dtype) { |
| 210 | canvas.setDevice(new SkDevice(SkBitmap::kARGB_8888_Config, DEV_W, DEV_H, false))->unref(); |
| 211 | } else { |
| 212 | #if SK_SCALAR_IS_FIXED |
| 213 | // GPU device known not to work in the fixed pt build. |
| 214 | continue; |
| 215 | #endif |
| 216 | canvas.setDevice(new SkGpuDevice(context, SkBitmap::kARGB_8888_Config, DEV_W, DEV_H))->unref(); |
| 217 | } |
| 218 | fillCanvas(&canvas); |
| 219 | |
| 220 | for (int rect = 0; rect < SK_ARRAY_COUNT(testRects); ++rect) { |
| 221 | SkBitmap bmp; |
| 222 | for (BitmapInit bmi = kFirstBitmapInit; bmi < kBitmapInitCnt; bmi = nextBMI(bmi)) { |
| 223 | |
| 224 | const SkIRect& srcRect = testRects[rect]; |
| 225 | |
| 226 | init_bitmap(&bmp, srcRect, bmi); |
| 227 | |
| 228 | // if the bitmap has pixels allocated before the readPixels, note |
| 229 | // that and fill them with pattern |
| 230 | bool startsWithPixels = !bmp.isNull(); |
| 231 | if (startsWithPixels) { |
| 232 | fillBitmap(&bmp); |
| 233 | } |
| 234 | |
| 235 | bool success = canvas.readPixels(&bmp, srcRect.fLeft, srcRect.fTop); |
| 236 | |
| 237 | // determine whether we expected the read to succeed. |
| 238 | REPORTER_ASSERT(reporter, success == SkIRect::Intersects(srcRect, DEV_RECT)); |
| 239 | |
| 240 | if (success || startsWithPixels) { |
| 241 | checkRead(reporter, bmp, srcRect.fLeft, srcRect.fTop, startsWithPixels); |
| 242 | } else { |
| 243 | // if we had no pixels beforehand and the readPixels failed then |
| 244 | // our bitmap should still not have any pixels |
| 245 | REPORTER_ASSERT(reporter, bmp.isNull()); |
| 246 | } |
| 247 | |
| 248 | // check the old webkit version of readPixels that clips the bitmap size |
| 249 | SkBitmap wkbmp; |
| 250 | success = canvas.readPixels(srcRect, &wkbmp); |
| 251 | SkIRect clippedRect = DEV_RECT; |
| 252 | if (clippedRect.intersect(srcRect)) { |
| 253 | REPORTER_ASSERT(reporter, success); |
| 254 | checkRead(reporter, wkbmp, clippedRect.fLeft, clippedRect.fTop, false); |
| 255 | } else { |
| 256 | REPORTER_ASSERT(reporter, !success); |
| 257 | } |
| 258 | } |
| 259 | } |
| 260 | } |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | #include "TestClassDef.h" |
| 265 | DEFINE_GPUTESTCLASS("ReadPixels", ReadPixelsTestClass, ReadPixelsTest) |
| 266 | |