/* * Copyright 2013 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/SkBlendMode.h" #include "include/core/SkCanvas.h" #include "include/core/SkColor.h" #include "include/core/SkColorFilter.h" #include "include/core/SkFont.h" #include "include/core/SkImageFilter.h" #include "include/core/SkPaint.h" #include "include/core/SkRRect.h" #include "include/core/SkRect.h" #include "include/core/SkRefCnt.h" #include "include/core/SkScalar.h" #include "include/core/SkTypeface.h" #include "include/core/SkTypes.h" #include "include/effects/SkImageFilters.h" #include "include/utils/SkTextUtils.h" #include "tools/ToolUtils.h" #include "tools/fonts/FontToolUtils.h" #include /////////////////////////////////////////////////////////////////////////////// static void draw_paint(SkCanvas* canvas, const SkRect& r, sk_sp imf) { SkPaint paint; paint.setImageFilter(std::move(imf)); paint.setColor(SK_ColorBLACK); canvas->save(); canvas->clipRect(r); canvas->drawPaint(paint); canvas->restore(); } static void draw_path(SkCanvas* canvas, const SkRect& r, sk_sp imf) { SkPaint paint; paint.setColor(SK_ColorGREEN); paint.setImageFilter(std::move(imf)); paint.setAntiAlias(true); canvas->save(); canvas->clipRect(r); canvas->drawCircle(r.centerX(), r.centerY(), r.width()/3, paint); canvas->restore(); } static void draw_text(SkCanvas* canvas, const SkRect& r, sk_sp imf) { SkPaint paint; paint.setImageFilter(std::move(imf)); paint.setColor(SK_ColorGREEN); paint.setAntiAlias(true); SkFont font(ToolUtils::DefaultPortableTypeface(), r.height() / 2); canvas->save(); canvas->clipRect(r); SkTextUtils::DrawString(canvas, "Text", r.centerX(), r.centerY(), font, paint, SkTextUtils::kCenter_Align); canvas->restore(); } static void draw_bitmap(SkCanvas* canvas, const SkRect& r, sk_sp imf) { SkPaint paint; SkIRect bounds; r.roundOut(&bounds); auto surf = SkSurfaces::Raster(SkImageInfo::MakeN32Premul(bounds.width(), bounds.height())); draw_path(surf->getCanvas(), r, nullptr); paint.setImageFilter(std::move(imf)); canvas->save(); canvas->clipRect(r); surf->draw(canvas, 0, 0, SkSamplingOptions(), &paint); canvas->restore(); } /////////////////////////////////////////////////////////////////////////////// DEF_SIMPLE_GM(dropshadowimagefilter, canvas, 400, 656) { void (*drawProc[])(SkCanvas*, const SkRect&, sk_sp) = { draw_bitmap, draw_path, draw_paint, draw_text }; sk_sp cf(SkColorFilters::Blend(SK_ColorMAGENTA, SkBlendMode::kSrcIn)); sk_sp cfif(SkImageFilters::ColorFilter(std::move(cf), nullptr)); SkIRect cropRect = SkIRect::MakeXYWH(10, 10, 44, 44); SkIRect bogusRect = SkIRect::MakeXYWH(-100, -100, 10, 10); sk_sp spinCS = SkColorSpace::MakeSRGB()->makeColorSpin(); sk_sp filters[] = { nullptr, SkImageFilters::DropShadow(7.0f, 0.0f, 0.0f, 3.0f, SK_ColorBLUE, nullptr), SkImageFilters::DropShadow(0.0f, 7.0f, 3.0f, 0.0f, SK_ColorBLUE, nullptr), SkImageFilters::DropShadow(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE, nullptr), SkImageFilters::DropShadow(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE, std::move(cfif)), SkImageFilters::DropShadow( 7.0f, 7.0f, 3.0f, 3.0f, SkColors::kGreen, spinCS, nullptr, &cropRect), SkImageFilters::DropShadow(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE, nullptr, &bogusRect), SkImageFilters::DropShadowOnly(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE, nullptr), }; SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64)); SkScalar MARGIN = SkIntToScalar(16); SkScalar DX = r.width() + MARGIN; SkScalar DY = r.height() + MARGIN; canvas->translate(MARGIN, MARGIN); for (size_t j = 0; j < std::size(drawProc); ++j) { canvas->save(); for (size_t i = 0; i < std::size(filters); ++i) { drawProc[j](canvas, r, filters[i]); canvas->translate(0, DY); } canvas->restore(); canvas->translate(DX, 0); } } DEF_SIMPLE_GM(dropshadow_pseudopersp, canvas, 155, 155) { canvas->clear(SK_ColorLTGRAY); canvas->concat(SkM44{0.5f, 0.f, 0.f, -75.f, 0.f, 0.5f, 0.f, -30.f, 0.f, 0.f, 1.f, 0.f, 0.f, 0.f, 0.f, 1.f}); // This 4x4 matrtix technically has perspective, but it only impacts the Z values and the // projection doesn't appear to have any distortion. However, the projected coordinates have // Z values very different from 0. When inversing the device bounds with an assumed Z=0, the // layer bounds end up empty. This GM ensures layer mapping calculations don't discard it. canvas->concat(SkM44{1360.f, 0.f, 275.4f, 294100.f, 0.f, 1360.f, 489.6f, 98344.f, 0.f, 0.f, -0.51f, -2180.67f, 0.f, 0.f, 0.51f, 2181.67f}); SkRect layerBounds{42.5f, 42.5f, 457.5f, 457.5f}; SkPaint layerPaint; layerPaint.setImageFilter(SkImageFilters::DropShadow( /*dx=*/30.f, /*dy=*/30.f, /*sigmaX=*/12.f, /*sigmaY=*/12.f, /*color=*/{0.14902f, 0.215686f, 0.329412f, 0.666667f}, /*colorSpace=*/nullptr, /*input=*/nullptr)); canvas->saveLayer(&layerBounds, &layerPaint); SkRRect rrect = SkRRect::MakeRectXY({-250.f, -250.f, 250.f, 250.f}, 45.f, 45.f); SkPaint rrectPaint; rrectPaint.setColor4f(SkColors::kWhite); rrectPaint.setAntiAlias(true); canvas->concat(SkM44{0.83f, 0.f, 0.f, 250.f, 0.f, 0.83f, 0.f, 250.f, 0.f, 0.f, 1.f, 0.f, 0.f, 0.f, 0.f, 1.f}); canvas->drawRRect(rrect, rrectPaint); canvas->restore(); canvas->concat(SkM44{0.83f, 0.f, 0.f, 250.f, 0.f, 0.83f, 0.f, 250.f, 0.f, 0.f, 1.f, 0.f, 0.f, 0.f, 0.f, 1.f}); rrectPaint.setColor4f(SkColors::kBlack); rrectPaint.setStyle(SkPaint::kStroke_Style); canvas->drawRRect(rrect, rrectPaint); }