| /* |
| * Copyright 2014 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/SkBitmap.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkImage.h" |
| #include "include/core/SkImageFilter.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/SkRRect.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkSurface.h" |
| #include "include/core/SkTypes.h" |
| #include "include/effects/SkImageFilters.h" |
| #include "include/private/SkTArray.h" |
| |
| #include <utility> |
| |
| namespace skiagm { |
| |
| // Each method of this type must draw its geometry inside 'r' using 'p' |
| typedef void(*drawMth)(SkCanvas* canvas, const SkRect& r, const SkPaint& p); |
| |
| static void draw_rect(SkCanvas* canvas, const SkRect& r, const SkPaint& p) { |
| canvas->drawRect(r, p); |
| } |
| |
| static void draw_oval(SkCanvas* canvas, const SkRect& r, const SkPaint& p) { |
| canvas->drawOval(r, p); |
| } |
| |
| static void draw_rrect(SkCanvas* canvas, const SkRect& r, const SkPaint& p) { |
| SkScalar xRad = r.width() / 4.0f; |
| SkScalar yRad = r.height() / 4.0f; |
| |
| SkRRect rr; |
| rr.setRectXY(r, xRad, yRad); |
| canvas->drawRRect(rr, p); |
| } |
| |
| static void draw_drrect(SkCanvas* canvas, const SkRect& r, const SkPaint& p) { |
| SkScalar xRad = r.width() / 4.0f; |
| SkScalar yRad = r.height() / 4.0f; |
| |
| SkRRect outer; |
| outer.setRectXY(r, xRad, yRad); |
| SkRRect inner = outer; |
| inner.inset(xRad, yRad); |
| canvas->drawDRRect(outer, inner, p); |
| } |
| |
| static void draw_path(SkCanvas* canvas, const SkRect& r, const SkPaint& p) { |
| canvas->drawPath(SkPath::Polygon({ |
| {r.fLeft, r.fTop}, |
| {r.fLeft, r.fBottom}, |
| {r.fRight, r.fBottom}, |
| }, true), p); |
| } |
| |
| static void draw_points(SkCanvas* canvas, const SkRect& r, const SkPaint& p) { |
| SkPoint pts0[2] = { { r.fLeft, r.fTop }, { r.fRight, r.fBottom } }; |
| SkPoint pts1[2] = { { r.fLeft, r.fBottom }, { r.fRight, r.fTop } }; |
| |
| canvas->drawPoints(SkCanvas::kLines_PointMode, 2, pts0, p); |
| canvas->drawPoints(SkCanvas::kLines_PointMode, 2, pts1, p); |
| } |
| |
| static void draw_bitmap(SkCanvas* canvas, const SkRect& r, const SkPaint& p) { |
| SkBitmap bm; |
| |
| bm.allocN32Pixels(64, 64); |
| SkCanvas temp(bm); |
| temp.clear(SK_ColorMAGENTA); |
| |
| canvas->drawImageRect(bm.asImage(), r, SkSamplingOptions(), &p); |
| } |
| |
| constexpr drawMth gDrawMthds[] = { |
| draw_rect, draw_oval, draw_rrect, draw_drrect, draw_path, draw_points, draw_bitmap |
| }; |
| |
| static void add_paint(SkTArray<SkPaint>* paints, sk_sp<SkImageFilter> filter) { |
| SkPaint& p = paints->push_back(); |
| p.setImageFilter(std::move(filter)); |
| SkASSERT(p.canComputeFastBounds()); |
| } |
| |
| // Create a selection of imagefilter-based paints to test |
| static void create_paints(SkTArray<SkPaint>* paints, sk_sp<SkImageFilter> source) { |
| { |
| SkMatrix scale; |
| scale.setScale(2.0f, 2.0f); |
| |
| sk_sp<SkImageFilter> scaleMIF( |
| SkImageFilters::MatrixTransform(scale, SkSamplingOptions(SkFilterMode::kLinear), |
| source)); |
| |
| add_paint(paints, std::move(scaleMIF)); |
| } |
| |
| { |
| SkMatrix rot; |
| rot.setRotate(-33.3f); |
| |
| sk_sp<SkImageFilter> rotMIF( |
| SkImageFilters::MatrixTransform(rot, SkSamplingOptions(SkFilterMode::kLinear), source)); |
| |
| add_paint(paints, std::move(rotMIF)); |
| } |
| |
| { |
| SkRect src = SkRect::MakeXYWH(20, 20, 10, 10); |
| SkRect dst = SkRect::MakeXYWH(30, 30, 30, 30); |
| sk_sp<SkImageFilter> tileIF(SkImageFilters::Tile(src, dst, nullptr)); |
| |
| add_paint(paints, std::move(tileIF)); |
| } |
| |
| { |
| sk_sp<SkImageFilter> dsif = |
| SkImageFilters::DropShadow(10.0f, 10.0f, 3.0f, 3.0f, SK_ColorRED, source); |
| |
| add_paint(paints, std::move(dsif)); |
| } |
| |
| { |
| sk_sp<SkImageFilter> dsif = |
| SkImageFilters::DropShadowOnly(27.0f, 27.0f, 3.0f, 3.0f, SK_ColorRED, source); |
| |
| add_paint(paints, std::move(dsif)); |
| } |
| |
| add_paint(paints, SkImageFilters::Blur(3, 3, source)); |
| add_paint(paints, SkImageFilters::Offset(15, 15, source)); |
| } |
| |
| // This GM visualizes the fast bounds for various combinations of geometry |
| // and image filter |
| class ImageFilterFastBoundGM : public GM { |
| public: |
| ImageFilterFastBoundGM() { |
| this->setBGColor(0xFFCCCCCC); |
| } |
| |
| protected: |
| inline static constexpr int kTileWidth = 100; |
| inline static constexpr int kTileHeight = 100; |
| inline static constexpr int kNumVertTiles = 7; |
| inline static constexpr int kNumXtraCols = 2; |
| |
| SkString onShortName() override { return SkString("filterfastbounds"); } |
| |
| SkISize onISize() override { |
| return SkISize::Make((std::size(gDrawMthds) + kNumXtraCols) * kTileWidth, |
| kNumVertTiles * kTileHeight); |
| } |
| |
| static void draw_geom_with_paint(drawMth draw, const SkIPoint& off, |
| SkCanvas* canvas, const SkPaint& p) { |
| SkPaint redStroked; |
| redStroked.setColor(SK_ColorRED); |
| redStroked.setStyle(SkPaint::kStroke_Style); |
| |
| SkPaint blueStroked; |
| blueStroked.setColor(SK_ColorBLUE); |
| blueStroked.setStyle(SkPaint::kStroke_Style); |
| |
| const SkRect r = SkRect::MakeLTRB(20, 20, 30, 30); |
| SkRect storage; |
| |
| canvas->save(); |
| canvas->translate(SkIntToScalar(off.fX), SkIntToScalar(off.fY)); |
| canvas->scale(1.5f, 1.5f); |
| |
| const SkRect& fastBound = p.computeFastBounds(r, &storage); |
| |
| canvas->save(); |
| canvas->clipRect(fastBound); |
| (*draw)(canvas, r, p); |
| canvas->restore(); |
| |
| canvas->drawRect(r, redStroked); |
| canvas->drawRect(fastBound, blueStroked); |
| canvas->restore(); |
| } |
| |
| static void draw_savelayer_with_paint(const SkIPoint& off, |
| SkCanvas* canvas, |
| const SkPaint& p) { |
| SkPaint redStroked; |
| redStroked.setColor(SK_ColorRED); |
| redStroked.setStyle(SkPaint::kStroke_Style); |
| |
| SkPaint blueStroked; |
| blueStroked.setColor(SK_ColorBLUE); |
| blueStroked.setStyle(SkPaint::kStroke_Style); |
| |
| const SkRect bounds = SkRect::MakeWH(10, 10); |
| SkRect storage; |
| |
| canvas->save(); |
| canvas->translate(30, 30); |
| canvas->translate(SkIntToScalar(off.fX), SkIntToScalar(off.fY)); |
| canvas->scale(1.5f, 1.5f); |
| |
| const SkRect& fastBound = p.computeFastBounds(bounds, &storage); |
| |
| canvas->saveLayer(&fastBound, &p); |
| canvas->restore(); |
| |
| canvas->drawRect(bounds, redStroked); |
| canvas->drawRect(fastBound, blueStroked); |
| canvas->restore(); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| |
| SkPaint blackFill; |
| |
| //----------- |
| // Normal paints (no source) |
| SkTArray<SkPaint> paints; |
| create_paints(&paints, nullptr); |
| |
| //----------- |
| // Paints with a PictureImageFilter as a source |
| sk_sp<SkPicture> pic; |
| |
| { |
| SkPictureRecorder rec; |
| |
| SkCanvas* c = rec.beginRecording(10, 10); |
| c->drawRect(SkRect::MakeWH(10, 10), blackFill); |
| pic = rec.finishRecordingAsPicture(); |
| } |
| |
| SkTArray<SkPaint> pifPaints; |
| create_paints(&pifPaints, SkImageFilters::Picture(pic)); |
| |
| //----------- |
| // Paints with a SkImageSource as a source |
| |
| auto surface(SkSurface::MakeRasterN32Premul(10, 10)); |
| { |
| SkPaint p; |
| SkCanvas* temp = surface->getCanvas(); |
| temp->clear(SK_ColorYELLOW); |
| p.setColor(SK_ColorBLUE); |
| temp->drawRect(SkRect::MakeLTRB(5, 5, 10, 10), p); |
| p.setColor(SK_ColorGREEN); |
| temp->drawRect(SkRect::MakeLTRB(5, 0, 10, 5), p); |
| } |
| |
| sk_sp<SkImage> image(surface->makeImageSnapshot()); |
| sk_sp<SkImageFilter> imageSource(SkImageFilters::Image(std::move(image))); |
| SkTArray<SkPaint> bmsPaints; |
| create_paints(&bmsPaints, std::move(imageSource)); |
| |
| //----------- |
| SkASSERT(paints.count() == kNumVertTiles); |
| SkASSERT(paints.count() == pifPaints.count()); |
| SkASSERT(paints.count() == bmsPaints.count()); |
| |
| // horizontal separators |
| for (int i = 1; i < paints.count(); ++i) { |
| canvas->drawLine(0, |
| i*SkIntToScalar(kTileHeight), |
| SkIntToScalar((std::size(gDrawMthds) + kNumXtraCols)*kTileWidth), |
| i*SkIntToScalar(kTileHeight), |
| blackFill); |
| } |
| // vertical separators |
| for (int i = 0; i < (int)std::size(gDrawMthds) + kNumXtraCols; ++i) { |
| canvas->drawLine(SkIntToScalar(i * kTileWidth), |
| 0, |
| SkIntToScalar(i * kTileWidth), |
| SkIntToScalar(paints.count() * kTileWidth), |
| blackFill); |
| } |
| |
| // A column of saveLayers with PictureImageFilters |
| for (int i = 0; i < pifPaints.count(); ++i) { |
| draw_savelayer_with_paint(SkIPoint::Make(0, i*kTileHeight), |
| canvas, pifPaints[i]); |
| } |
| |
| // A column of saveLayers with BitmapSources |
| for (int i = 0; i < pifPaints.count(); ++i) { |
| draw_savelayer_with_paint(SkIPoint::Make(kTileWidth, i*kTileHeight), |
| canvas, bmsPaints[i]); |
| } |
| |
| // Multiple columns with different geometry |
| for (int i = 0; i < (int)std::size(gDrawMthds); ++i) { |
| for (int j = 0; j < paints.count(); ++j) { |
| draw_geom_with_paint(*gDrawMthds[i], |
| SkIPoint::Make((i+kNumXtraCols) * kTileWidth, j*kTileHeight), |
| canvas, paints[j]); |
| } |
| } |
| |
| } |
| |
| private: |
| using INHERITED = GM; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM(return new ImageFilterFastBoundGM;) |
| } // namespace skiagm |