311 lines
11 KiB
C++
311 lines
11 KiB
C++
/*
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* Copyright 2014 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm/gm.h"
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#include "include/core/SkBitmap.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkMatrix.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPicture.h"
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#include "include/core/SkPictureRecorder.h"
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#include "include/core/SkPoint.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkRefCnt.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkShader.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/core/SkTextBlob.h"
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#include "include/core/SkTileMode.h"
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#include "include/core/SkTypes.h"
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#include "tools/ToolUtils.h"
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static struct {
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SkTileMode tmx;
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SkTileMode tmy;
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} kTileConfigs[] = {
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{ SkTileMode::kRepeat, SkTileMode::kRepeat },
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{ SkTileMode::kRepeat, SkTileMode::kClamp },
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{ SkTileMode::kMirror, SkTileMode::kRepeat },
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};
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class PictureShaderGM : public skiagm::GM {
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public:
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PictureShaderGM(SkScalar tileSize, SkScalar sceneSize, bool useLocalMatrixWrapper = false,
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float alpha = 1)
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: fTileSize(tileSize)
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, fSceneSize(sceneSize)
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, fAlpha(alpha)
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, fUseLocalMatrixWrapper(useLocalMatrixWrapper)
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{}
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protected:
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void onOnceBeforeDraw() override {
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// Build the picture.
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SkPictureRecorder recorder;
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SkCanvas* pictureCanvas = recorder.beginRecording(fTileSize, fTileSize);
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this->drawTile(pictureCanvas);
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fPicture = recorder.finishRecordingAsPicture();
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// Build a reference bitmap.
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fBitmap.allocN32Pixels(SkScalarCeilToInt(fTileSize), SkScalarCeilToInt(fTileSize));
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fBitmap.eraseColor(SK_ColorTRANSPARENT);
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SkCanvas bitmapCanvas(fBitmap);
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this->drawTile(&bitmapCanvas);
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}
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SkString onShortName() override {
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return SkStringPrintf("pictureshader%s%s",
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fUseLocalMatrixWrapper ? "_localwrapper" : "",
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fAlpha < 1 ? "_alpha" : "");
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}
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SkISize onISize() override {
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return SkISize::Make(1400, 1450);
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}
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void onDraw(SkCanvas* canvas) override {
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this->drawSceneColumn(canvas, SkPoint::Make(0, 0), 1, 1, 0);
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this->drawSceneColumn(canvas, SkPoint::Make(0, fSceneSize * 6.4f), 1, 2, 0);
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this->drawSceneColumn(canvas, SkPoint::Make(fSceneSize * 2.4f, 0), 1, 1, 1);
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this->drawSceneColumn(canvas, SkPoint::Make(fSceneSize * 2.4f, fSceneSize * 6.4f), 1, 1, 2);
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this->drawSceneColumn(canvas, SkPoint::Make(fSceneSize * 4.8f, 0), 2, 1, 0);
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this->drawSceneColumn(canvas, SkPoint::Make(fSceneSize * 9.6f, 0), 2, 2, 0);
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// One last custom row to exercise negative scaling
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SkMatrix ctm, localMatrix;
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ctm.setTranslate(fSceneSize * 2.1f, fSceneSize * 13.8f);
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ctm.preScale(-1, -1);
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localMatrix.setScale(2, 2);
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this->drawScene(canvas, ctm, localMatrix, 0);
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ctm.setTranslate(fSceneSize * 2.4f, fSceneSize * 12.8f);
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localMatrix.setScale(-1, -1);
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this->drawScene(canvas, ctm, localMatrix, 0);
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ctm.setTranslate(fSceneSize * 4.8f, fSceneSize * 12.3f);
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ctm.preScale(2, 2);
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this->drawScene(canvas, ctm, localMatrix, 0);
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ctm.setTranslate(fSceneSize * 13.8f, fSceneSize * 14.3f);
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ctm.preScale(-2, -2);
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localMatrix.setTranslate(fTileSize / 4, fTileSize / 4);
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localMatrix.preRotate(45);
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localMatrix.preScale(-2, -2);
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this->drawScene(canvas, ctm, localMatrix, 0);
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}
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private:
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void drawSceneColumn(SkCanvas* canvas, const SkPoint& pos, SkScalar scale, SkScalar localScale,
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unsigned tileMode) {
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SkMatrix ctm, localMatrix;
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ctm.setTranslate(pos.x(), pos.y());
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ctm.preScale(scale, scale);
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localMatrix.setScale(localScale, localScale);
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this->drawScene(canvas, ctm, localMatrix, tileMode);
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ctm.setTranslate(pos.x(), pos.y() + fSceneSize * 1.2f * scale);
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ctm.preScale(scale, scale);
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localMatrix.setTranslate(fTileSize / 4, fTileSize / 4);
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localMatrix.preScale(localScale, localScale);
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this->drawScene(canvas, ctm, localMatrix, tileMode);
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ctm.setTranslate(pos.x(), pos.y() + fSceneSize * 2.4f * scale);
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ctm.preScale(scale, scale);
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localMatrix.setRotate(45);
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localMatrix.preScale(localScale, localScale);
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this->drawScene(canvas, ctm, localMatrix, tileMode);
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ctm.setTranslate(pos.x(), pos.y() + fSceneSize * 3.6f * scale);
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ctm.preScale(scale, scale);
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localMatrix.setSkew(1, 0);
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localMatrix.preScale(localScale, localScale);
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this->drawScene(canvas, ctm, localMatrix, tileMode);
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ctm.setTranslate(pos.x(), pos.y() + fSceneSize * 4.8f * scale);
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ctm.preScale(scale, scale);
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localMatrix.setTranslate(fTileSize / 4, fTileSize / 4);
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localMatrix.preRotate(45);
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localMatrix.preScale(localScale, localScale);
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this->drawScene(canvas, ctm, localMatrix, tileMode);
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}
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void drawTile(SkCanvas* canvas) {
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SkPaint paint;
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paint.setColor(SK_ColorGREEN);
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paint.setStyle(SkPaint::kFill_Style);
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paint.setAntiAlias(true);
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canvas->drawCircle(fTileSize / 4, fTileSize / 4, fTileSize / 4, paint);
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canvas->drawRect(SkRect::MakeXYWH(fTileSize / 2, fTileSize / 2,
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fTileSize / 2, fTileSize / 2), paint);
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paint.setColor(SK_ColorRED);
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canvas->drawLine(fTileSize / 2, fTileSize * 1 / 3,
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fTileSize / 2, fTileSize * 2 / 3, paint);
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canvas->drawLine(fTileSize * 1 / 3, fTileSize / 2,
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fTileSize * 2 / 3, fTileSize / 2, paint);
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}
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void drawScene(SkCanvas* canvas, const SkMatrix& matrix, const SkMatrix& localMatrix,
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unsigned tileMode) {
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SkASSERT(tileMode < SK_ARRAY_COUNT(kTileConfigs));
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SkPaint paint;
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paint.setStyle(SkPaint::kFill_Style);
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paint.setColor(SK_ColorLTGRAY);
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canvas->save();
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canvas->concat(matrix);
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canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint);
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canvas->drawRect(SkRect::MakeXYWH(fSceneSize * 1.1f, 0, fSceneSize, fSceneSize), paint);
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paint.setAlphaf(fAlpha);
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auto pictureShader = fPicture->makeShader(kTileConfigs[tileMode].tmx,
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kTileConfigs[tileMode].tmy,
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SkFilterMode::kNearest,
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fUseLocalMatrixWrapper ? nullptr : &localMatrix,
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nullptr);
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paint.setShader(fUseLocalMatrixWrapper
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? pictureShader->makeWithLocalMatrix(localMatrix)
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: pictureShader);
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canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint);
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canvas->translate(fSceneSize * 1.1f, 0);
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auto bitmapShader = fBitmap.makeShader(kTileConfigs[tileMode].tmx,
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kTileConfigs[tileMode].tmy,
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SkSamplingOptions(),
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fUseLocalMatrixWrapper ? nullptr : &localMatrix);
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paint.setShader(fUseLocalMatrixWrapper
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? bitmapShader->makeWithLocalMatrix(localMatrix)
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: bitmapShader);
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canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint);
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canvas->restore();
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}
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const SkScalar fTileSize;
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const SkScalar fSceneSize;
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const float fAlpha;
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const bool fUseLocalMatrixWrapper;
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sk_sp<SkPicture> fPicture;
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SkBitmap fBitmap;
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using INHERITED = GM;
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};
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DEF_GM(return new PictureShaderGM(50, 100);)
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DEF_GM(return new PictureShaderGM(50, 100, true);)
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DEF_GM(return new PictureShaderGM(50, 100, false, 0.25f);)
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DEF_SIMPLE_GM(tiled_picture_shader, canvas, 400, 400) {
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// https://code.google.com/p/skia/issues/detail?id=3398
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SkRect tile = SkRect::MakeWH(100, 100);
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SkPictureRecorder recorder;
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SkCanvas* c = recorder.beginRecording(tile);
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SkRect r = tile;
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r.inset(4, 4);
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SkPaint p;
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p.setColor(ToolUtils::color_to_565(0xFF303F9F)); // dark blue
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c->drawRect(r, p);
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p.setColor(ToolUtils::color_to_565(0xFFC5CAE9)); // light blue
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p.setStrokeWidth(10);
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c->drawLine(20, 20, 80, 80, p);
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sk_sp<SkPicture> picture(recorder.finishRecordingAsPicture());
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p.setColor(ToolUtils::color_to_565(0xFF8BC34A)); // green
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canvas->drawPaint(p);
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canvas->clipRect(SkRect::MakeXYWH(0, 0, 400, 350));
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p.setColor(0xFFB6B6B6); // gray
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canvas->drawPaint(p);
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p.setShader(picture->makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat,
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SkFilterMode::kNearest));
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canvas->drawPaint(p);
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}
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DEF_SIMPLE_GM(pictureshader_persp, canvas, 215, 110) {
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enum class DrawStrategy {
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kDirect,
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kPictureShader,
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};
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auto drawPicture = [](SkCanvas* canvas, sk_sp<SkPicture> picture, DrawStrategy strategy) {
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// Only want local upper 50x50 of 'picture' before we apply decal (or clip)
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SkRect bounds = {0.f, 0.f, 50.f, 50.f};
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switch(strategy) {
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case DrawStrategy::kDirect: {
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canvas->clipRect(bounds, true);
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canvas->drawPicture(picture);
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break; }
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case DrawStrategy::kPictureShader: {
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SkPaint paint;
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paint.setShader(picture->makeShader(SkTileMode::kDecal, SkTileMode::kDecal,
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SkFilterMode::kLinear, nullptr, &bounds));
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canvas->drawRect({0.f, 0.f, 50.f, 50.f}, paint);
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break; }
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}
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};
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auto picture = []() {
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sk_sp<SkTypeface> typeface = SkTypeface::MakeDefault();
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if (!typeface) {
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typeface = SkTypeface::MakeFromName("monospace", SkFontStyle());
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}
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SkFont font;
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font.setTypeface(typeface);
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font.setHinting(SkFontHinting::kNormal);
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font.setSize(8.f);
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SkPaint paint;
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paint.setColor(SK_ColorGREEN);
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SkPictureRecorder recorder;
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SkCanvas* record_canvas = recorder.beginRecording({0, 0, 100, 100});
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record_canvas->drawTextBlob(SkTextBlob::MakeFromString("Hamburgefons", font),
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0, 16.f, paint);
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return recorder.finishRecordingAsPicture();
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}();
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SkM44 m;
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m.preScale(2.f, 2.f);
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SkM44 persp = SkM44::Perspective(0.01f, 10.f, SK_ScalarPI / 3.f);
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persp.preTranslate(0.f, 5.f, -0.1f);
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persp.preConcat(SkM44::Rotate({0.f, 1.f, 0.f}, 0.008f));
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m.postConcat(persp);
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canvas->clear(SK_ColorBLACK);
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canvas->translate(5.f, 5.f);
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for (auto strategy : { DrawStrategy::kDirect,
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DrawStrategy::kPictureShader }) {
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canvas->save();
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SkPaint outline;
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outline.setColor(SK_ColorWHITE);
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outline.setStyle(SkPaint::kStroke_Style);
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outline.setStrokeWidth(1.f);
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canvas->drawRect({-1, -1, 101, 101}, outline);
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canvas->clipRect({0, 0, 100, 100});
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canvas->concat(m);
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drawPicture(canvas, picture, strategy);
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canvas->restore();
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canvas->translate(105.f, 0.f);
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}
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}
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