| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm.h" |
| #include "SkBlurImageFilter.h" |
| #include "SkColorMatrixFilter.h" |
| #include "SkImage.h" |
| #include "SkImageFilter.h" |
| #include "SkSurface.h" |
| |
| /** |
| * Test drawing a primitive w/ an imagefilter (in this case, just matrix w/ identity) to see |
| * that we apply the xfermode *after* the image has been created and filtered, and not during |
| * the creation step (i.e. before it is filtered). |
| * |
| * see https://bug.skia.org/3741 |
| */ |
| static void do_draw(SkCanvas* canvas, SkXfermode::Mode mode, SkImageFilter* imf) { |
| SkAutoCanvasRestore acr(canvas, true); |
| canvas->clipRect(SkRect::MakeWH(220, 220)); |
| |
| // want to force a layer, so modes like DstIn can combine meaningfully, but the final |
| // image can still be shown against our default (opaque) background. non-opaque GMs |
| // are a lot more trouble to compare/triage. |
| canvas->saveLayer(nullptr, nullptr); |
| canvas->drawColor(SK_ColorGREEN); |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| |
| SkRect r0 = SkRect::MakeXYWH(10, 60, 200, 100); |
| SkRect r1 = SkRect::MakeXYWH(60, 10, 100, 200); |
| |
| paint.setColor(SK_ColorRED); |
| canvas->drawOval(r0, paint); |
| |
| paint.setColor(0x660000FF); |
| paint.setImageFilter(imf); |
| paint.setXfermodeMode(mode); |
| canvas->drawOval(r1, paint); |
| } |
| |
| DEF_SIMPLE_GM(imagefilters_xfermodes, canvas, 480, 480) { |
| canvas->translate(10, 10); |
| |
| // just need an imagefilter to trigger the code-path (which creates a tmp layer) |
| SkAutoTUnref<SkImageFilter> imf(SkImageFilter::CreateMatrixFilter(SkMatrix::I(), |
| kNone_SkFilterQuality)); |
| |
| const SkXfermode::Mode modes[] = { |
| SkXfermode::kSrcATop_Mode, SkXfermode::kDstIn_Mode |
| }; |
| |
| for (size_t i = 0; i < SK_ARRAY_COUNT(modes); ++i) { |
| canvas->save(); |
| do_draw(canvas, modes[i], nullptr); |
| canvas->translate(240, 0); |
| do_draw(canvas, modes[i], imf); |
| canvas->restore(); |
| |
| canvas->translate(0, 240); |
| } |
| } |
| |
| static SkImage* make_image(SkCanvas* canvas) { |
| const SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100); |
| SkAutoTUnref<SkSurface> surface(canvas->newSurface(info)); |
| if (!surface) { |
| surface.reset(SkSurface::NewRaster(info)); |
| } |
| surface->getCanvas()->drawRect(SkRect::MakeXYWH(25, 25, 50, 50), SkPaint()); |
| return surface->newImageSnapshot(); |
| } |
| |
| // Compare blurs when we're tightly clipped (fast) and not as tightly (slower) |
| // |
| // Expect the two to draw the same (modulo the extra border of pixels when the clip is larger) |
| // |
| DEF_SIMPLE_GM(fast_slow_blurimagefilter, canvas, 620, 260) { |
| SkAutoTUnref<SkImage> image(make_image(canvas)); |
| const SkRect r = SkRect::MakeIWH(image->width(), image->height()); |
| |
| canvas->translate(10, 10); |
| for (SkScalar sigma = 8; sigma <= 128; sigma *= 2) { |
| SkPaint paint; |
| paint.setImageFilter(SkBlurImageFilter::Create(sigma, sigma))->unref(); |
| |
| canvas->save(); |
| // we outset the clip by 1, to fall out of the fast-case in drawImage |
| // i.e. the clip is larger than the image |
| for (SkScalar outset = 0; outset <= 1; ++outset) { |
| canvas->save(); |
| canvas->clipRect(r.makeOutset(outset, outset)); |
| canvas->drawImage(image, 0, 0, &paint); |
| canvas->restore(); |
| canvas->translate(0, r.height() + 20); |
| } |
| canvas->restore(); |
| canvas->translate(r.width() + 20, 0); |
| } |
| } |