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- /*
- * 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 <string.h>
- #include <memory>
- 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<SkImageGenerator> 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<SkPicture> fPicture;
- const SkScalar kPictureWidth = 200;
- const SkScalar kPictureHeight = 100;
- typedef skiagm::GM INHERITED;
- };
- DEF_GM(return new PictureGeneratorGM;)
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