222 lines
8.4 KiB
C++
222 lines
8.4 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.h"
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#include "sk_tool_utils.h"
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#include "SkBitmap.h"
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#include "SkPaint.h"
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#include "SkPicture.h"
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#include "SkPictureRecorder.h"
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#include "SkShader.h"
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static struct {
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SkShader::TileMode tmx;
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SkShader::TileMode tmy;
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} kTileConfigs[] = {
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{ SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode },
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{ SkShader::kRepeat_TileMode, SkShader::kClamp_TileMode },
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{ SkShader::kMirror_TileMode, SkShader::kRepeat_TileMode },
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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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: fTileSize(tileSize)
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, fSceneSize(sceneSize)
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, fUseLocalMatrixWrapper(useLocalMatrixWrapper) {}
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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, nullptr, 0);
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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", fUseLocalMatrixWrapper ? "_localwrapper" : "");
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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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auto pictureShader = SkShader::MakePictureShader(fPicture, kTileConfigs[tileMode].tmx,
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kTileConfigs[tileMode].tmy,
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fUseLocalMatrixWrapper
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? 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 = SkShader::MakeBitmapShader(fBitmap,
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kTileConfigs[tileMode].tmx,
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kTileConfigs[tileMode].tmy,
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fUseLocalMatrixWrapper
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? 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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sk_sp<SkPicture> fPicture;
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SkBitmap fBitmap;
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SkScalar fTileSize;
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SkScalar fSceneSize;
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bool fUseLocalMatrixWrapper;
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typedef GM INHERITED;
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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_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(sk_tool_utils::color_to_565(0xFF303F9F)); // dark blue
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c->drawRect(r, p);
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p.setColor(sk_tool_utils::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(sk_tool_utils::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(SkShader::MakePictureShader(std::move(picture), SkShader::kRepeat_TileMode,
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SkShader::kRepeat_TileMode,
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nullptr, nullptr));
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canvas->drawPaint(p);
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}
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