/* * 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/gm.h" #include "include/core/SkBitmap.h" #include "include/core/SkCanvas.h" #include "include/core/SkColor.h" #include "include/core/SkColorSpace.h" #include "include/core/SkFont.h" #include "include/core/SkFontTypes.h" #include "include/core/SkImage.h" #include "include/core/SkImageGenerator.h" #include "include/core/SkImageInfo.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/SkSize.h" #include "include/core/SkString.h" #include "include/core/SkTileMode.h" #include "include/core/SkTypeface.h" #include "include/core/SkTypes.h" #include "include/effects/SkGradientShader.h" #include "include/pathops/SkPathOps.h" #include "include/utils/SkTextUtils.h" #include "tools/ToolUtils.h" #include #include static void draw_vector_logo(SkCanvas* canvas, const SkRect& viewBox) { constexpr char kSkiaStr[] = "SKIA"; constexpr SkScalar kGradientPad = .1f; constexpr SkScalar kVerticalSpacing = 0.25f; constexpr SkScalar kAccentScale = 1.20f; SkPaint paint; paint.setAntiAlias(true); SkFont font(ToolUtils::create_portable_typeface()); font.setSubpixel(true); font.setEmbolden(true); SkPath path; SkRect iBox, skiBox, skiaBox; SkTextUtils::GetPath("SKI", 3, SkTextEncoding::kUTF8, 0, 0, font, &path); TightBounds(path, &skiBox); SkTextUtils::GetPath("I", 1, SkTextEncoding::kUTF8, 0, 0, font, &path); TightBounds(path, &iBox); iBox.offsetTo(skiBox.fRight - iBox.width(), iBox.fTop); const size_t textLen = strlen(kSkiaStr); SkTextUtils::GetPath(kSkiaStr, textLen, SkTextEncoding::kUTF8, 0, 0, font, &path); TightBounds(path, &skiaBox); skiaBox.outset(0, 2 * iBox.width() * (kVerticalSpacing + 1)); const SkScalar accentSize = iBox.width() * kAccentScale; const SkScalar underlineY = iBox.bottom() + (kVerticalSpacing + SkScalarSqrt(3) / 2) * accentSize; SkMatrix m; m.setRectToRect(skiaBox, viewBox, SkMatrix::kFill_ScaleToFit); SkAutoCanvasRestore acr(canvas, true); canvas->concat(m); canvas->drawCircle(iBox.centerX(), iBox.y() - (0.5f + kVerticalSpacing) * accentSize, accentSize / 2, paint); path.reset(); path.moveTo(iBox.centerX() - accentSize / 2, iBox.bottom() + kVerticalSpacing * accentSize); path.rLineTo(accentSize, 0); path.lineTo(iBox.centerX(), underlineY); canvas->drawPath(path, paint); SkRect underlineRect = SkRect::MakeLTRB(iBox.centerX() - iBox.width() * accentSize * 3, underlineY, iBox.centerX(), underlineY + accentSize / 10); const SkPoint pts1[] = { SkPoint::Make(underlineRect.x(), 0), SkPoint::Make(iBox.centerX(), 0) }; const SkScalar pos1[] = { 0, 0.75f }; const SkColor colors1[] = { SK_ColorTRANSPARENT, SK_ColorBLACK }; SkASSERT(SK_ARRAY_COUNT(pos1) == SK_ARRAY_COUNT(colors1)); paint.setShader(SkGradientShader::MakeLinear(pts1, colors1, pos1, SK_ARRAY_COUNT(pos1), SkTileMode::kClamp)); canvas->drawRect(underlineRect, paint); const SkPoint pts2[] = { SkPoint::Make(iBox.x() - iBox.width() * kGradientPad, 0), SkPoint::Make(iBox.right() + iBox.width() * kGradientPad, 0) }; const SkScalar pos2[] = { 0, .01f, 1.0f/3, 1.0f/3, 2.0f/3, 2.0f/3, .99f, 1 }; const SkColor colors2[] = { SK_ColorBLACK, 0xffca5139, 0xffca5139, 0xff8dbd53, 0xff8dbd53, 0xff5460a5, 0xff5460a5, SK_ColorBLACK }; SkASSERT(SK_ARRAY_COUNT(pos2) == SK_ARRAY_COUNT(colors2)); paint.setShader(SkGradientShader::MakeLinear(pts2, colors2, pos2, SK_ARRAY_COUNT(pos2), SkTileMode::kClamp)); canvas->drawSimpleText(kSkiaStr, textLen, SkTextEncoding::kUTF8, 0, 0, font, paint); } // This GM exercises SkPictureImageGenerator features // (in particular its matrix vs. bounds semantics). class PictureGeneratorGM : public skiagm::GM { protected: SkString onShortName() override { return SkString("pictureimagegenerator"); } SkISize onISize() override { return SkISize::Make(1160, 860); } void onOnceBeforeDraw() override { const SkRect rect = SkRect::MakeWH(kPictureWidth, kPictureHeight); SkPictureRecorder recorder; SkCanvas* canvas = recorder.beginRecording(rect); draw_vector_logo(canvas, rect); fPicture = recorder.finishRecordingAsPicture(); } void onDraw(SkCanvas* canvas) override { const struct { SkISize size; SkScalar scaleX, scaleY; SkScalar opacity; } configs[] = { { SkISize::Make(200, 100), 1, 1, 1 }, { SkISize::Make(200, 200), 1, 1, 1 }, { SkISize::Make(200, 200), 1, 2, 1 }, { SkISize::Make(400, 200), 2, 2, 1 }, { SkISize::Make(200, 100), 1, 1, 0.9f }, { SkISize::Make(200, 200), 1, 1, 0.75f }, { SkISize::Make(200, 200), 1, 2, 0.5f }, { SkISize::Make(400, 200), 2, 2, 0.25f }, { SkISize::Make(200, 200), 0.5f, 1, 1 }, { SkISize::Make(200, 200), 1, 0.5f, 1 }, { SkISize::Make(200, 200), 0.5f, 0.5f, 1 }, { SkISize::Make(200, 200), 2, 2, 1 }, { SkISize::Make(200, 100), -1, 1, 1 }, { SkISize::Make(200, 100), 1, -1, 1 }, { SkISize::Make(200, 100), -1, -1, 1 }, { SkISize::Make(200, 100), -1, -1, 0.5f }, }; auto srgbColorSpace = SkColorSpace::MakeSRGB(); const unsigned kDrawsPerRow = 4; const SkScalar kDrawSize = 250; for (size_t i = 0; i < SK_ARRAY_COUNT(configs); ++i) { SkPaint p; p.setAlphaf(configs[i].opacity); SkMatrix m = SkMatrix::MakeScale(configs[i].scaleX, configs[i].scaleY); if (configs[i].scaleX < 0) { m.postTranslate(SkIntToScalar(configs[i].size.width()), 0); } if (configs[i].scaleY < 0) { m.postTranslate(0, SkIntToScalar(configs[i].size.height())); } std::unique_ptr gen = SkImageGenerator::MakeFromPicture(configs[i].size, fPicture, &m, p.getAlpha() != 255 ? &p : nullptr, SkImage::BitDepth::kU8, srgbColorSpace); SkImageInfo bmInfo = gen->getInfo().makeColorSpace(canvas->imageInfo().refColorSpace()); SkBitmap bm; bm.allocPixels(bmInfo); SkAssertResult(gen->getPixels(bm.info(), bm.getPixels(), bm.rowBytes())); const SkScalar x = kDrawSize * (i % kDrawsPerRow); const SkScalar y = kDrawSize * (i / kDrawsPerRow); p.setColor(0xfff0f0f0); p.setAlphaf(1.0f); canvas->drawRect(SkRect::MakeXYWH(x, y, SkIntToScalar(bm.width()), SkIntToScalar(bm.height())), p); canvas->drawBitmap(bm, x, y); } } private: sk_sp fPicture; const SkScalar kPictureWidth = 200; const SkScalar kPictureHeight = 100; typedef skiagm::GM INHERITED; }; DEF_GM(return new PictureGeneratorGM;)