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 "SkCanvas.h"
9 #include "SkColorData.h"
10 #include "SkHalf.h"
11 #include "SkImageInfoPriv.h"
12 #include "SkMathPriv.h"
13 #include "SkSurface.h"
14 #include "Test.h"
15
16 #if SK_SUPPORT_GPU
17 #include "GrContext.h"
18 #include "GrContextFactory.h"
19 #include "GrContextPriv.h"
20 #include "GrProxyProvider.h"
21 #include "SkGr.h"
22 #endif
23
24 #include <initializer_list>
25
26 static const int DEV_W = 100, DEV_H = 100;
27 static const SkIRect DEV_RECT = SkIRect::MakeWH(DEV_W, DEV_H);
28 static const SkRect DEV_RECT_S = SkRect::MakeWH(DEV_W * SK_Scalar1,
29 DEV_H * SK_Scalar1);
30
get_src_color(int x,int y)31 static SkPMColor get_src_color(int x, int y) {
32 SkASSERT(x >= 0 && x < DEV_W);
33 SkASSERT(y >= 0 && y < DEV_H);
34
35 U8CPU r = x;
36 U8CPU g = y;
37 U8CPU b = 0xc;
38
39 U8CPU a = 0xff;
40 switch ((x+y) % 5) {
41 case 0:
42 a = 0xff;
43 break;
44 case 1:
45 a = 0x80;
46 break;
47 case 2:
48 a = 0xCC;
49 break;
50 case 4:
51 a = 0x01;
52 break;
53 case 3:
54 a = 0x00;
55 break;
56 }
57 return SkPremultiplyARGBInline(a, r, g, b);
58 }
59
get_dst_bmp_init_color(int x,int y,int w)60 static SkPMColor get_dst_bmp_init_color(int x, int y, int w) {
61 int n = y * w + x;
62
63 U8CPU b = n & 0xff;
64 U8CPU g = (n >> 8) & 0xff;
65 U8CPU r = (n >> 16) & 0xff;
66 return SkPackARGB32(0xff, r, g , b);
67 }
68
convert_to_pmcolor(SkColorType ct,SkAlphaType at,const uint32_t * addr,bool * doUnpremul)69 static SkPMColor convert_to_pmcolor(SkColorType ct, SkAlphaType at, const uint32_t* addr,
70 bool* doUnpremul) {
71 *doUnpremul = (kUnpremul_SkAlphaType == at);
72
73 const uint8_t* c = reinterpret_cast<const uint8_t*>(addr);
74 U8CPU a,r,g,b;
75 switch (ct) {
76 case kBGRA_8888_SkColorType:
77 b = static_cast<U8CPU>(c[0]);
78 g = static_cast<U8CPU>(c[1]);
79 r = static_cast<U8CPU>(c[2]);
80 a = static_cast<U8CPU>(c[3]);
81 break;
82 case kRGBA_8888_SkColorType:
83 r = static_cast<U8CPU>(c[0]);
84 g = static_cast<U8CPU>(c[1]);
85 b = static_cast<U8CPU>(c[2]);
86 a = static_cast<U8CPU>(c[3]);
87 break;
88 default:
89 SkDEBUGFAIL("Unexpected colortype");
90 return 0;
91 }
92
93 if (*doUnpremul) {
94 r = SkMulDiv255Ceiling(r, a);
95 g = SkMulDiv255Ceiling(g, a);
96 b = SkMulDiv255Ceiling(b, a);
97 }
98 return SkPackARGB32(a, r, g, b);
99 }
100
make_src_bitmap()101 static SkBitmap make_src_bitmap() {
102 static SkBitmap bmp;
103 if (bmp.isNull()) {
104 bmp.allocN32Pixels(DEV_W, DEV_H);
105 intptr_t pixels = reinterpret_cast<intptr_t>(bmp.getPixels());
106 for (int y = 0; y < DEV_H; ++y) {
107 for (int x = 0; x < DEV_W; ++x) {
108 SkPMColor* pixel = reinterpret_cast<SkPMColor*>(pixels + y * bmp.rowBytes() + x * bmp.bytesPerPixel());
109 *pixel = get_src_color(x, y);
110 }
111 }
112 }
113 return bmp;
114 }
115
fill_src_canvas(SkCanvas * canvas)116 static void fill_src_canvas(SkCanvas* canvas) {
117 canvas->save();
118 canvas->setMatrix(SkMatrix::I());
119 canvas->clipRect(DEV_RECT_S, kReplace_SkClipOp);
120 SkPaint paint;
121 paint.setBlendMode(SkBlendMode::kSrc);
122 canvas->drawBitmap(make_src_bitmap(), 0, 0, &paint);
123 canvas->restore();
124 }
125
fill_dst_bmp_with_init_data(SkBitmap * bitmap)126 static void fill_dst_bmp_with_init_data(SkBitmap* bitmap) {
127 int w = bitmap->width();
128 int h = bitmap->height();
129 intptr_t pixels = reinterpret_cast<intptr_t>(bitmap->getPixels());
130 for (int y = 0; y < h; ++y) {
131 for (int x = 0; x < w; ++x) {
132 SkPMColor initColor = get_dst_bmp_init_color(x, y, w);
133 if (kAlpha_8_SkColorType == bitmap->colorType()) {
134 uint8_t* alpha = reinterpret_cast<uint8_t*>(pixels + y * bitmap->rowBytes() + x);
135 *alpha = SkGetPackedA32(initColor);
136 } else {
137 SkPMColor* pixel = reinterpret_cast<SkPMColor*>(pixels + y * bitmap->rowBytes() + x * bitmap->bytesPerPixel());
138 *pixel = initColor;
139 }
140 }
141 }
142 }
143
check_read_pixel(SkPMColor a,SkPMColor b,bool didPremulConversion)144 static bool check_read_pixel(SkPMColor a, SkPMColor b, bool didPremulConversion) {
145 if (!didPremulConversion) {
146 return a == b;
147 }
148 int32_t aA = static_cast<int32_t>(SkGetPackedA32(a));
149 int32_t aR = static_cast<int32_t>(SkGetPackedR32(a));
150 int32_t aG = static_cast<int32_t>(SkGetPackedG32(a));
151 int32_t aB = SkGetPackedB32(a);
152
153 int32_t bA = static_cast<int32_t>(SkGetPackedA32(b));
154 int32_t bR = static_cast<int32_t>(SkGetPackedR32(b));
155 int32_t bG = static_cast<int32_t>(SkGetPackedG32(b));
156 int32_t bB = static_cast<int32_t>(SkGetPackedB32(b));
157
158 return aA == bA &&
159 SkAbs32(aR - bR) <= 1 &&
160 SkAbs32(aG - bG) <= 1 &&
161 SkAbs32(aB - bB) <= 1;
162 }
163
164 // checks the bitmap contains correct pixels after the readPixels
165 // if the bitmap was prefilled with pixels it checks that these weren't
166 // overwritten in the area outside the readPixels.
check_read(skiatest::Reporter * reporter,const SkBitmap & bitmap,int x,int y,bool checkCanvasPixels,bool checkBitmapPixels,SkColorType ct,SkAlphaType at)167 static bool check_read(skiatest::Reporter* reporter,
168 const SkBitmap& bitmap,
169 int x, int y,
170 bool checkCanvasPixels,
171 bool checkBitmapPixels,
172 SkColorType ct,
173 SkAlphaType at) {
174 SkASSERT(ct == bitmap.colorType() && at == bitmap.alphaType());
175 SkASSERT(!bitmap.isNull());
176 SkASSERT(checkCanvasPixels || checkBitmapPixels);
177
178 int bw = bitmap.width();
179 int bh = bitmap.height();
180
181 SkIRect srcRect = SkIRect::MakeXYWH(x, y, bw, bh);
182 SkIRect clippedSrcRect = DEV_RECT;
183 if (!clippedSrcRect.intersect(srcRect)) {
184 clippedSrcRect.setEmpty();
185 }
186 if (kAlpha_8_SkColorType == ct) {
187 for (int by = 0; by < bh; ++by) {
188 for (int bx = 0; bx < bw; ++bx) {
189 int devx = bx + srcRect.fLeft;
190 int devy = by + srcRect.fTop;
191 const uint8_t* alpha = bitmap.getAddr8(bx, by);
192
193 if (clippedSrcRect.contains(devx, devy)) {
194 if (checkCanvasPixels) {
195 uint8_t canvasAlpha = SkGetPackedA32(get_src_color(devx, devy));
196 if (canvasAlpha != *alpha) {
197 ERRORF(reporter, "Expected readback alpha (%d, %d) value 0x%02x, got 0x%02x. ",
198 bx, by, canvasAlpha, *alpha);
199 return false;
200 }
201 }
202 } else if (checkBitmapPixels) {
203 uint32_t origDstAlpha = SkGetPackedA32(get_dst_bmp_init_color(bx, by, bw));
204 if (origDstAlpha != *alpha) {
205 ERRORF(reporter, "Expected clipped out area of readback to be unchanged. "
206 "Expected 0x%02x, got 0x%02x", origDstAlpha, *alpha);
207 return false;
208 }
209 }
210 }
211 }
212 return true;
213 }
214 for (int by = 0; by < bh; ++by) {
215 for (int bx = 0; bx < bw; ++bx) {
216 int devx = bx + srcRect.fLeft;
217 int devy = by + srcRect.fTop;
218
219 const uint32_t* pixel = bitmap.getAddr32(bx, by);
220
221 if (clippedSrcRect.contains(devx, devy)) {
222 if (checkCanvasPixels) {
223 SkPMColor canvasPixel = get_src_color(devx, devy);
224 bool didPremul;
225 SkPMColor pmPixel = convert_to_pmcolor(ct, at, pixel, &didPremul);
226 if (!check_read_pixel(pmPixel, canvasPixel, didPremul)) {
227 ERRORF(reporter, "Expected readback pixel (%d, %d) value 0x%08x, got 0x%08x. "
228 "Readback was unpremul: %d", bx, by, canvasPixel, pmPixel, didPremul);
229 return false;
230 }
231 }
232 } else if (checkBitmapPixels) {
233 uint32_t origDstPixel = get_dst_bmp_init_color(bx, by, bw);
234 if (origDstPixel != *pixel) {
235 ERRORF(reporter, "Expected clipped out area of readback to be unchanged. "
236 "Expected 0x%08x, got 0x%08x", origDstPixel, *pixel);
237 return false;
238 }
239 }
240 }
241 }
242 return true;
243 }
244
245 enum BitmapInit {
246 kFirstBitmapInit = 0,
247
248 kTight_BitmapInit = kFirstBitmapInit,
249 kRowBytes_BitmapInit,
250 kRowBytesOdd_BitmapInit,
251
252 kLastAligned_BitmapInit = kRowBytes_BitmapInit,
253
254 #if 0 // THIS CAUSES ERRORS ON WINDOWS AND SOME ANDROID DEVICES
255 kLast_BitmapInit = kRowBytesOdd_BitmapInit
256 #else
257 kLast_BitmapInit = kLastAligned_BitmapInit
258 #endif
259 };
260
nextBMI(BitmapInit bmi)261 static BitmapInit nextBMI(BitmapInit bmi) {
262 int x = bmi;
263 return static_cast<BitmapInit>(++x);
264 }
265
init_bitmap(SkBitmap * bitmap,const SkIRect & rect,BitmapInit init,SkColorType ct,SkAlphaType at)266 static void init_bitmap(SkBitmap* bitmap, const SkIRect& rect, BitmapInit init, SkColorType ct,
267 SkAlphaType at) {
268 SkImageInfo info = SkImageInfo::Make(rect.width(), rect.height(), ct, at);
269 size_t rowBytes = 0;
270 switch (init) {
271 case kTight_BitmapInit:
272 break;
273 case kRowBytes_BitmapInit:
274 rowBytes = SkAlign4((info.width() + 16) * info.bytesPerPixel());
275 break;
276 case kRowBytesOdd_BitmapInit:
277 rowBytes = SkAlign4(info.width() * info.bytesPerPixel()) + 3;
278 break;
279 default:
280 SkASSERT(0);
281 break;
282 }
283 bitmap->allocPixels(info, rowBytes);
284 }
285
286 static const struct {
287 SkColorType fColorType;
288 SkAlphaType fAlphaType;
289 } gReadPixelsConfigs[] = {
290 { kRGBA_8888_SkColorType, kPremul_SkAlphaType },
291 { kRGBA_8888_SkColorType, kUnpremul_SkAlphaType },
292 { kBGRA_8888_SkColorType, kPremul_SkAlphaType },
293 { kBGRA_8888_SkColorType, kUnpremul_SkAlphaType },
294 { kAlpha_8_SkColorType, kPremul_SkAlphaType },
295 };
296 const SkIRect gReadPixelsTestRects[] = {
297 // entire thing
298 DEV_RECT,
299 // larger on all sides
300 SkIRect::MakeLTRB(-10, -10, DEV_W + 10, DEV_H + 10),
301 // fully contained
302 SkIRect::MakeLTRB(DEV_W / 4, DEV_H / 4, 3 * DEV_W / 4, 3 * DEV_H / 4),
303 // outside top left
304 SkIRect::MakeLTRB(-10, -10, -1, -1),
305 // touching top left corner
306 SkIRect::MakeLTRB(-10, -10, 0, 0),
307 // overlapping top left corner
308 SkIRect::MakeLTRB(-10, -10, DEV_W / 4, DEV_H / 4),
309 // overlapping top left and top right corners
310 SkIRect::MakeLTRB(-10, -10, DEV_W + 10, DEV_H / 4),
311 // touching entire top edge
312 SkIRect::MakeLTRB(-10, -10, DEV_W + 10, 0),
313 // overlapping top right corner
314 SkIRect::MakeLTRB(3 * DEV_W / 4, -10, DEV_W + 10, DEV_H / 4),
315 // contained in x, overlapping top edge
316 SkIRect::MakeLTRB(DEV_W / 4, -10, 3 * DEV_W / 4, DEV_H / 4),
317 // outside top right corner
318 SkIRect::MakeLTRB(DEV_W + 1, -10, DEV_W + 10, -1),
319 // touching top right corner
320 SkIRect::MakeLTRB(DEV_W, -10, DEV_W + 10, 0),
321 // overlapping top left and bottom left corners
322 SkIRect::MakeLTRB(-10, -10, DEV_W / 4, DEV_H + 10),
323 // touching entire left edge
324 SkIRect::MakeLTRB(-10, -10, 0, DEV_H + 10),
325 // overlapping bottom left corner
326 SkIRect::MakeLTRB(-10, 3 * DEV_H / 4, DEV_W / 4, DEV_H + 10),
327 // contained in y, overlapping left edge
328 SkIRect::MakeLTRB(-10, DEV_H / 4, DEV_W / 4, 3 * DEV_H / 4),
329 // outside bottom left corner
330 SkIRect::MakeLTRB(-10, DEV_H + 1, -1, DEV_H + 10),
331 // touching bottom left corner
332 SkIRect::MakeLTRB(-10, DEV_H, 0, DEV_H + 10),
333 // overlapping bottom left and bottom right corners
334 SkIRect::MakeLTRB(-10, 3 * DEV_H / 4, DEV_W + 10, DEV_H + 10),
335 // touching entire left edge
336 SkIRect::MakeLTRB(0, DEV_H, DEV_W, DEV_H + 10),
337 // overlapping bottom right corner
338 SkIRect::MakeLTRB(3 * DEV_W / 4, 3 * DEV_H / 4, DEV_W + 10, DEV_H + 10),
339 // overlapping top right and bottom right corners
340 SkIRect::MakeLTRB(3 * DEV_W / 4, -10, DEV_W + 10, DEV_H + 10),
341 };
342
test_readpixels(skiatest::Reporter * reporter,const sk_sp<SkSurface> & surface,BitmapInit lastBitmapInit)343 static void test_readpixels(skiatest::Reporter* reporter, const sk_sp<SkSurface>& surface,
344 BitmapInit lastBitmapInit) {
345 SkCanvas* canvas = surface->getCanvas();
346 fill_src_canvas(canvas);
347 for (size_t rect = 0; rect < SK_ARRAY_COUNT(gReadPixelsTestRects); ++rect) {
348 const SkIRect& srcRect = gReadPixelsTestRects[rect];
349 for (BitmapInit bmi = kFirstBitmapInit; bmi <= lastBitmapInit; bmi = nextBMI(bmi)) {
350 for (size_t c = 0; c < SK_ARRAY_COUNT(gReadPixelsConfigs); ++c) {
351 SkBitmap bmp;
352 init_bitmap(&bmp, srcRect, bmi,
353 gReadPixelsConfigs[c].fColorType, gReadPixelsConfigs[c].fAlphaType);
354
355 // if the bitmap has pixels allocated before the readPixels,
356 // note that and fill them with pattern
357 bool startsWithPixels = !bmp.isNull();
358 if (startsWithPixels) {
359 fill_dst_bmp_with_init_data(&bmp);
360 }
361 uint32_t idBefore = surface->generationID();
362 bool success = surface->readPixels(bmp, srcRect.fLeft, srcRect.fTop);
363 uint32_t idAfter = surface->generationID();
364
365 // we expect to succeed when the read isn't fully clipped
366 // out.
367 bool expectSuccess = SkIRect::Intersects(srcRect, DEV_RECT);
368 // determine whether we expected the read to succeed.
369 REPORTER_ASSERT(reporter, success == expectSuccess);
370 // read pixels should never change the gen id
371 REPORTER_ASSERT(reporter, idBefore == idAfter);
372
373 if (success || startsWithPixels) {
374 check_read(reporter, bmp, srcRect.fLeft, srcRect.fTop,
375 success, startsWithPixels,
376 gReadPixelsConfigs[c].fColorType, gReadPixelsConfigs[c].fAlphaType);
377 } else {
378 // if we had no pixels beforehand and the readPixels
379 // failed then our bitmap should still not have pixels
380 REPORTER_ASSERT(reporter, bmp.isNull());
381 }
382 }
383 }
384 }
385 }
DEF_TEST(ReadPixels,reporter)386 DEF_TEST(ReadPixels, reporter) {
387 const SkImageInfo info = SkImageInfo::MakeN32Premul(DEV_W, DEV_H);
388 auto surface(SkSurface::MakeRaster(info));
389 // SW readback fails a premul check when reading back to an unaligned rowbytes.
390 test_readpixels(reporter, surface, kLastAligned_BitmapInit);
391 }
392 #if SK_SUPPORT_GPU
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ReadPixels_Gpu,reporter,ctxInfo)393 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ReadPixels_Gpu, reporter, ctxInfo) {
394 if (ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D9_ES2_ContextType ||
395 ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_GL_ES2_ContextType ||
396 ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D11_ES2_ContextType) {
397 // skbug.com/6742 ReadPixels_Texture & _Gpu don't work with ANGLE ES2 configs
398 return;
399 }
400
401 const SkImageInfo ii = SkImageInfo::MakeN32Premul(DEV_W, DEV_H);
402 for (auto& origin : {kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin}) {
403 sk_sp<SkSurface> surface(SkSurface::MakeRenderTarget(ctxInfo.grContext(), SkBudgeted::kNo,
404 ii, 0, origin, nullptr));
405 test_readpixels(reporter, surface, kLast_BitmapInit);
406 }
407 }
408 #endif
409
410 #if SK_SUPPORT_GPU
test_readpixels_texture(skiatest::Reporter * reporter,sk_sp<GrSurfaceContext> sContext)411 static void test_readpixels_texture(skiatest::Reporter* reporter,
412 sk_sp<GrSurfaceContext> sContext) {
413 for (size_t rect = 0; rect < SK_ARRAY_COUNT(gReadPixelsTestRects); ++rect) {
414 const SkIRect& srcRect = gReadPixelsTestRects[rect];
415 for (BitmapInit bmi = kFirstBitmapInit; bmi <= kLast_BitmapInit; bmi = nextBMI(bmi)) {
416 for (size_t c = 0; c < SK_ARRAY_COUNT(gReadPixelsConfigs); ++c) {
417 SkBitmap bmp;
418 init_bitmap(&bmp, srcRect, bmi,
419 gReadPixelsConfigs[c].fColorType, gReadPixelsConfigs[c].fAlphaType);
420
421 // if the bitmap has pixels allocated before the readPixels,
422 // note that and fill them with pattern
423 bool startsWithPixels = !bmp.isNull();
424 // Try doing the read directly from a non-renderable texture
425 if (startsWithPixels) {
426 fill_dst_bmp_with_init_data(&bmp);
427 uint32_t flags = 0;
428 if (gReadPixelsConfigs[c].fAlphaType == kUnpremul_SkAlphaType) {
429 flags = GrContextPriv::kUnpremul_PixelOpsFlag;
430 }
431 bool success = sContext->readPixels(bmp.info(), bmp.getPixels(),
432 bmp.rowBytes(),
433 srcRect.fLeft, srcRect.fTop, flags);
434 check_read(reporter, bmp, srcRect.fLeft, srcRect.fTop,
435 success, true,
436 gReadPixelsConfigs[c].fColorType, gReadPixelsConfigs[c].fAlphaType);
437 }
438 }
439 }
440 }
441 }
442
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ReadPixels_Texture,reporter,ctxInfo)443 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ReadPixels_Texture, reporter, ctxInfo) {
444 if (ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D9_ES2_ContextType ||
445 ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_GL_ES2_ContextType ||
446 ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D11_ES2_ContextType) {
447 // skbug.com/6742 ReadPixels_Texture & _Gpu don't work with ANGLE ES2 configs
448 return;
449 }
450
451 GrContext* context = ctxInfo.grContext();
452 GrProxyProvider* proxyProvider = context->contextPriv().proxyProvider();
453
454 SkBitmap bmp = make_src_bitmap();
455
456 // On the GPU we will also try reading back from a non-renderable texture.
457 for (auto origin : {kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin}) {
458 for (auto flags : {kNone_GrSurfaceFlags, kRenderTarget_GrSurfaceFlag}) {
459 GrSurfaceDesc desc;
460 desc.fFlags = flags;
461 desc.fWidth = DEV_W;
462 desc.fHeight = DEV_H;
463 desc.fConfig = kSkia8888_GrPixelConfig;
464 desc.fOrigin = origin;
465
466 sk_sp<GrTextureProxy> proxy = proxyProvider->createTextureProxy(desc, SkBudgeted::kNo,
467 bmp.getPixels(),
468 bmp.rowBytes());
469
470 sk_sp<GrSurfaceContext> sContext = context->contextPriv().makeWrappedSurfaceContext(
471 std::move(proxy));
472
473 test_readpixels_texture(reporter, std::move(sContext));
474 }
475 }
476 }
477 #endif
478
479 ///////////////////////////////////////////////////////////////////////////////////////////////////
480
481 static const uint32_t kNumPixels = 5;
482
483 // The five reference pixels are: red, green, blue, white, black.
484 // Five is an interesting number to test because we'll exercise a full 4-wide SIMD vector
485 // plus a tail pixel.
486 static const uint32_t rgba[kNumPixels] = {
487 0xFF0000FF, 0xFF00FF00, 0xFFFF0000, 0xFFFFFFFF, 0xFF000000
488 };
489 static const uint32_t bgra[kNumPixels] = {
490 0xFFFF0000, 0xFF00FF00, 0xFF0000FF, 0xFFFFFFFF, 0xFF000000
491 };
492 static const uint16_t rgb565[kNumPixels] = {
493 SK_R16_MASK_IN_PLACE, SK_G16_MASK_IN_PLACE, SK_B16_MASK_IN_PLACE, 0xFFFF, 0x0
494 };
495
496 static const uint16_t rgba4444[kNumPixels] = { 0xF00F, 0x0F0F, 0x00FF, 0xFFFF, 0x000F };
497
498 static const uint64_t kRed = (uint64_t) SK_Half1 << 0;
499 static const uint64_t kGreen = (uint64_t) SK_Half1 << 16;
500 static const uint64_t kBlue = (uint64_t) SK_Half1 << 32;
501 static const uint64_t kAlpha = (uint64_t) SK_Half1 << 48;
502 static const uint64_t f16[kNumPixels] = {
503 kAlpha | kRed, kAlpha | kGreen, kAlpha | kBlue, kAlpha | kBlue | kGreen | kRed, kAlpha
504 };
505
506 static const uint8_t alpha8[kNumPixels] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
507 static const uint8_t gray8[kNumPixels] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
508
five_reference_pixels(SkColorType colorType)509 static const void* five_reference_pixels(SkColorType colorType) {
510 switch (colorType) {
511 case kUnknown_SkColorType:
512 return nullptr;
513 case kAlpha_8_SkColorType:
514 return alpha8;
515 case kRGB_565_SkColorType:
516 return rgb565;
517 case kARGB_4444_SkColorType:
518 return rgba4444;
519 case kRGBA_8888_SkColorType:
520 return rgba;
521 case kBGRA_8888_SkColorType:
522 return bgra;
523 case kGray_8_SkColorType:
524 return gray8;
525 case kRGBA_F16_SkColorType:
526 return f16;
527 default:
528 return nullptr; // remove me when kIndex_8 is removed from the enum
529 }
530
531 SkASSERT(false);
532 return nullptr;
533 }
534
test_conversion(skiatest::Reporter * r,const SkImageInfo & dstInfo,const SkImageInfo & srcInfo)535 static void test_conversion(skiatest::Reporter* r, const SkImageInfo& dstInfo,
536 const SkImageInfo& srcInfo) {
537 if (!SkImageInfoIsValidRenderingCS(srcInfo)) {
538 return;
539 }
540
541 const void* srcPixels = five_reference_pixels(srcInfo.colorType());
542 SkPixmap srcPixmap(srcInfo, srcPixels, srcInfo.minRowBytes());
543 sk_sp<SkImage> src = SkImage::MakeFromRaster(srcPixmap, nullptr, nullptr);
544 REPORTER_ASSERT(r, src);
545
546 // Enough space for 5 pixels when color type is F16, more than enough space in other cases.
547 uint64_t dstPixels[kNumPixels];
548 SkPixmap dstPixmap(dstInfo, dstPixels, dstInfo.minRowBytes());
549 bool success = src->readPixels(dstPixmap, 0, 0);
550 REPORTER_ASSERT(r, success == SkImageInfoValidConversion(dstInfo, srcInfo));
551
552 if (success) {
553 if (kGray_8_SkColorType == srcInfo.colorType() &&
554 kGray_8_SkColorType != dstInfo.colorType())
555 {
556 // This conversion is legal, but we won't get the "reference" pixels since we cannot
557 // represent colors in kGray8.
558 return;
559 }
560
561 REPORTER_ASSERT(r, 0 == memcmp(dstPixels, five_reference_pixels(dstInfo.colorType()),
562 kNumPixels * SkColorTypeBytesPerPixel(dstInfo.colorType())));
563
564 }
565 }
566
DEF_TEST(ReadPixels_ValidConversion,reporter)567 DEF_TEST(ReadPixels_ValidConversion, reporter) {
568 const SkColorType kColorTypes[] = {
569 kUnknown_SkColorType,
570 kAlpha_8_SkColorType,
571 kRGB_565_SkColorType,
572 kARGB_4444_SkColorType,
573 kRGBA_8888_SkColorType,
574 kBGRA_8888_SkColorType,
575 kGray_8_SkColorType,
576 kRGBA_F16_SkColorType,
577 };
578
579 const SkAlphaType kAlphaTypes[] = {
580 kUnknown_SkAlphaType,
581 kOpaque_SkAlphaType,
582 kPremul_SkAlphaType,
583 kUnpremul_SkAlphaType,
584 };
585
586 const sk_sp<SkColorSpace> kColorSpaces[] = {
587 nullptr,
588 SkColorSpace::MakeSRGB(),
589 };
590
591 for (SkColorType dstCT : kColorTypes) {
592 for (SkAlphaType dstAT: kAlphaTypes) {
593 for (sk_sp<SkColorSpace> dstCS : kColorSpaces) {
594 for (SkColorType srcCT : kColorTypes) {
595 for (SkAlphaType srcAT: kAlphaTypes) {
596 for (sk_sp<SkColorSpace> srcCS : kColorSpaces) {
597 if (kRGBA_F16_SkColorType == dstCT && dstCS) {
598 dstCS = dstCS->makeLinearGamma();
599 }
600
601 if (kRGBA_F16_SkColorType == srcCT && srcCS) {
602 srcCS = srcCS->makeLinearGamma();
603 }
604
605 test_conversion(reporter,
606 SkImageInfo::Make(kNumPixels, 1, dstCT, dstAT, dstCS),
607 SkImageInfo::Make(kNumPixels, 1, srcCT, srcAT, srcCS));
608 }
609 }
610 }
611 }
612 }
613 }
614 }
615