| /* |
| * Copyright 2018 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm/gm.h" |
| #include "include/core/SkBlendMode.h" |
| #include "include/core/SkBlurTypes.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkCoverageMode.h" |
| #include "include/core/SkFont.h" |
| #include "include/core/SkImage.h" |
| #include "include/core/SkImageFilter.h" |
| #include "include/core/SkImageInfo.h" |
| #include "include/core/SkMaskFilter.h" |
| #include "include/core/SkMatrix.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPath.h" |
| #include "include/core/SkPicture.h" |
| #include "include/core/SkPictureRecorder.h" |
| #include "include/core/SkPoint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkSurface.h" |
| #include "include/core/SkTileMode.h" |
| #include "include/core/SkTypes.h" |
| #include "include/effects/SkGradientShader.h" |
| #include "include/effects/SkImageFilters.h" |
| #include "include/effects/SkShaderMaskFilter.h" |
| #include "include/utils/SkTextUtils.h" |
| #include "src/core/SkBlendModePriv.h" |
| #include "tools/Resources.h" |
| #include "tools/ToolUtils.h" |
| |
| #include <initializer_list> |
| |
| static void draw_masked_image(SkCanvas* canvas, const SkImage* image, SkScalar x, SkScalar y, |
| const SkImage* mask, sk_sp<SkMaskFilter> outer, SkBlendMode mode) { |
| SkMatrix matrix = SkMatrix::MakeScale(SkIntToScalar(image->width()) / mask->width(), |
| SkIntToScalar(image->height() / mask->height())); |
| // The geometry of the drawImage is also translated by (x,y) so make the mask filter's |
| // coordinate system align with the rendered rectangle. |
| matrix.postTranslate(x, y); |
| SkPaint paint; |
| auto mf = SkShaderMaskFilter::Make(mask->makeShader(&matrix)); |
| if (outer) { |
| mf = SkMaskFilter::MakeCompose(std::move(outer), std::move(mf)); |
| } |
| paint.setMaskFilter(mf); |
| paint.setAntiAlias(true); |
| paint.setBlendMode(mode); |
| canvas->drawImage(image, x, y, &paint); |
| } |
| |
| static sk_sp<SkShader> make_shader(const SkRect& r) { |
| const SkPoint pts[] = { |
| { r.fLeft, r.fTop }, { r.fRight, r.fBottom }, |
| }; |
| const SkColor colors[] = { 0, SK_ColorWHITE }; |
| return SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkTileMode::kRepeat); |
| } |
| |
| DEF_SIMPLE_GM(shadermaskfilter_gradient, canvas, 512, 512) { |
| SkRect r = { 0, 0, 100, 150 }; |
| auto shader = make_shader(r); |
| auto mf = SkShaderMaskFilter::Make(shader); |
| |
| canvas->translate(20, 20); |
| canvas->scale(2, 2); |
| |
| SkPaint paint; |
| paint.setMaskFilter(mf); |
| paint.setColor(SK_ColorRED); |
| paint.setAntiAlias(true); |
| canvas->drawOval(r, paint); |
| } |
| |
| DEF_SIMPLE_GM_CAN_FAIL(shadermaskfilter_image, canvas, errorMsg, 560, 370) { |
| canvas->scale(1.25f, 1.25f); |
| |
| auto image = GetResourceAsImage("images/mandrill_128.png"); |
| auto mask = GetResourceAsImage("images/color_wheel.png"); |
| if (!image || !mask) { |
| *errorMsg = "Could not load images. Did you forget to set the resourcePath?"; |
| return skiagm::DrawResult::kFail; |
| } |
| auto blurmf = SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, 5); |
| auto gradmf = SkShaderMaskFilter::Make(make_shader(SkRect::MakeIWH(mask->width(), |
| mask->height()))); |
| |
| const sk_sp<SkMaskFilter> array[] = { nullptr , blurmf, gradmf }; |
| for (SkBlendMode mode : {SkBlendMode::kSrcOver, SkBlendMode::kSrcIn}) { |
| canvas->save(); |
| for (sk_sp<SkMaskFilter> mf : array) { |
| draw_masked_image(canvas, image.get(), 10, 10, mask.get(), mf, mode); |
| canvas->translate(image->width() + 20.f, 0); |
| } |
| canvas->restore(); |
| canvas->translate(0, image->height() + 20.f); |
| } |
| return skiagm::DrawResult::kOk; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| static sk_sp<SkMaskFilter> make_path_mf(const SkPath& path, unsigned alpha) { |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| paint.setAlpha(alpha); |
| |
| SkPictureRecorder recorder; |
| recorder.beginRecording(1000, 1000)->drawPath(path, paint); |
| auto shader = recorder.finishRecordingAsPicture()->makeShader(SkTileMode::kClamp, |
| SkTileMode::kClamp); |
| return SkShaderMaskFilter::Make(shader); |
| } |
| |
| typedef void (*MakePathsProc)(const SkRect&, SkPath*, SkPath*); |
| |
| const char* gCoverageName[] = { |
| "union", "sect", "diff", "rev-diff", "xor" |
| }; |
| |
| DEF_SIMPLE_GM(combinemaskfilter, canvas, 560, 510) { |
| const SkRect r = { 0, 0, 100, 100 }; |
| |
| SkPaint paint; |
| paint.setColor(SK_ColorRED); |
| |
| SkFont font; |
| font.setSize(20); |
| |
| const SkRect r2 = r.makeOutset(1.5f, 1.5f); |
| SkPaint strokePaint; |
| strokePaint.setStyle(SkPaint::kStroke_Style); |
| |
| auto proc0 = [](const SkRect& r, SkPath* pathA, SkPath* pathB) { |
| pathA->moveTo(r.fLeft, r.fBottom); |
| pathA->lineTo(r.fRight, r.fTop); |
| pathA->lineTo(r.fRight, r.fBottom); |
| pathB->moveTo(r.fLeft, r.fTop); |
| pathB->lineTo(r.fRight, r.fBottom); |
| pathB->lineTo(r.fLeft, r.fBottom); |
| }; |
| auto proc1 = [](const SkRect& r, SkPath* pathA, SkPath* pathB) { |
| pathA->addCircle(r.width()*0.25f, r.height()*0.25f, r.width()*0.5f); |
| pathB->addCircle(r.width()*0.75f, r.height()*0.75f, r.width()*0.5f); |
| }; |
| MakePathsProc procs[] = { proc0, proc1 }; |
| |
| sk_sp<SkMaskFilter> mfA[2], mfB[2]; |
| for (int i = 0; i < 2; ++i) { |
| SkPath a, b; |
| procs[i](r, &a, &b); |
| mfA[i] = make_path_mf(a, 1 * 0xFF / 3); |
| mfB[i] = make_path_mf(b, 2 * 0xFF / 3); |
| } |
| |
| canvas->translate(10, 10 + 20); |
| canvas->save(); |
| for (int i = 0; i < 5; ++i) { |
| SkTextUtils::DrawString(canvas, gCoverageName[i], r.width()*0.5f, -10, font, SkPaint(), |
| SkTextUtils::kCenter_Align); |
| |
| SkCoverageMode cmode = static_cast<SkCoverageMode>(i); |
| canvas->save(); |
| // esp. on gpu side, its valuable to exercise modes that do and do-not convolve coverage |
| // with alpha. SrcOver and SrcIn have these properties, but also happen to "look" the same |
| // for this test. |
| const SkBlendMode bmodes[] = { SkBlendMode::kSrcOver, SkBlendMode::kSrcIn }; |
| SkASSERT( SkBlendMode_SupportsCoverageAsAlpha(bmodes[0])); // test as-alpha |
| SkASSERT(!SkBlendMode_SupportsCoverageAsAlpha(bmodes[1])); // test not-as-alpha |
| for (auto bmode : bmodes) { |
| paint.setBlendMode(bmode); |
| for (int j = 0; j < 2; ++j) { |
| paint.setMaskFilter(SkMaskFilter::MakeCombine(mfA[j], mfB[j], cmode)); |
| canvas->drawRect(r2, strokePaint); |
| canvas->drawRect(r, paint); |
| canvas->translate(0, r.height() + 10); |
| } |
| canvas->translate(0, 40); |
| } |
| canvas->restore(); |
| canvas->translate(r.width() + 10, 0); |
| } |
| canvas->restore(); |
| } |