| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkColor.h" |
| #include "SkColorFilter.h" |
| #include "SkColorPriv.h" |
| #include "SkLumaColorFilter.h" |
| #include "SkReadBuffer.h" |
| #include "SkWriteBuffer.h" |
| #include "SkRandom.h" |
| #include "SkXfermode.h" |
| #include "Test.h" |
| |
| static SkColorFilter* reincarnate_colorfilter(SkFlattenable* obj) { |
| SkWriteBuffer wb; |
| wb.writeFlattenable(obj); |
| |
| size_t size = wb.bytesWritten(); |
| SkAutoSMalloc<1024> storage(size); |
| // make a copy into storage |
| wb.writeToMemory(storage.get()); |
| |
| SkReadBuffer rb(storage.get(), size); |
| return rb.readColorFilter(); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #define ILLEGAL_MODE ((SkXfermode::Mode)-1) |
| |
| DEF_TEST(ColorFilter, reporter) { |
| SkRandom rand; |
| |
| for (int mode = 0; mode <= SkXfermode::kLastMode; mode++) { |
| SkColor color = rand.nextU(); |
| |
| // ensure we always get a filter, by avoiding the possibility of a |
| // special case that would return NULL (if color's alpha is 0 or 0xFF) |
| color = SkColorSetA(color, 0x7F); |
| |
| SkColorFilter* cf = SkColorFilter::CreateModeFilter(color, |
| (SkXfermode::Mode)mode); |
| |
| // allow for no filter if we're in Dst mode (its a no op) |
| if (SkXfermode::kDst_Mode == mode && NULL == cf) { |
| continue; |
| } |
| |
| SkAutoUnref aur(cf); |
| REPORTER_ASSERT(reporter, cf); |
| |
| SkColor c = ~color; |
| SkXfermode::Mode m = ILLEGAL_MODE; |
| |
| SkColor expectedColor = color; |
| SkXfermode::Mode expectedMode = (SkXfermode::Mode)mode; |
| |
| // SkDebugf("--- mc [%d %x] ", mode, color); |
| |
| REPORTER_ASSERT(reporter, cf->asColorMode(&c, &m)); |
| // handle special-case folding by the factory |
| if (SkXfermode::kClear_Mode == mode) { |
| if (c != expectedColor) { |
| expectedColor = 0; |
| } |
| if (m != expectedMode) { |
| expectedMode = SkXfermode::kSrc_Mode; |
| } |
| } |
| |
| // SkDebugf("--- got [%d %x] expected [%d %x]\n", m, c, expectedMode, expectedColor); |
| |
| REPORTER_ASSERT(reporter, c == expectedColor); |
| REPORTER_ASSERT(reporter, m == expectedMode); |
| |
| { |
| SkColorFilter* cf2 = reincarnate_colorfilter(cf); |
| SkAutoUnref aur2(cf2); |
| REPORTER_ASSERT(reporter, cf2); |
| |
| SkColor c2 = ~color; |
| SkXfermode::Mode m2 = ILLEGAL_MODE; |
| REPORTER_ASSERT(reporter, cf2->asColorMode(&c2, &m2)); |
| REPORTER_ASSERT(reporter, c2 == expectedColor); |
| REPORTER_ASSERT(reporter, m2 == expectedMode); |
| } |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_TEST(LumaColorFilter, reporter) { |
| SkPMColor in, out; |
| SkAutoTUnref<SkColorFilter> lf(SkLumaColorFilter::Create()); |
| |
| // Applying luma to white produces black with the same transparency. |
| for (unsigned i = 0; i < 256; ++i) { |
| in = SkPackARGB32(i, i, i, i); |
| lf->filterSpan(&in, 1, &out); |
| REPORTER_ASSERT(reporter, SkGetPackedA32(out) == i); |
| REPORTER_ASSERT(reporter, SkGetPackedR32(out) == 0); |
| REPORTER_ASSERT(reporter, SkGetPackedG32(out) == 0); |
| REPORTER_ASSERT(reporter, SkGetPackedB32(out) == 0); |
| } |
| |
| // Applying luma to black yields transparent black (luminance(black) == 0) |
| for (unsigned i = 0; i < 256; ++i) { |
| in = SkPackARGB32(i, 0, 0, 0); |
| lf->filterSpan(&in, 1, &out); |
| REPORTER_ASSERT(reporter, out == SK_ColorTRANSPARENT); |
| } |
| |
| // For general colors, a luma filter generates black with an attenuated alpha channel. |
| for (unsigned i = 1; i < 256; ++i) { |
| in = SkPackARGB32(i, i, i / 2, i / 3); |
| lf->filterSpan(&in, 1, &out); |
| REPORTER_ASSERT(reporter, out != in); |
| REPORTER_ASSERT(reporter, SkGetPackedA32(out) <= i); |
| REPORTER_ASSERT(reporter, SkGetPackedR32(out) == 0); |
| REPORTER_ASSERT(reporter, SkGetPackedG32(out) == 0); |
| REPORTER_ASSERT(reporter, SkGetPackedB32(out) == 0); |
| } |
| } |