/* * Copyright 2014 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "gm.h" #include "SkBitmap.h" #include "SkPaint.h" #include "SkPicture.h" #include "SkPictureRecorder.h" #include "SkShader.h" static struct { SkShader::TileMode tmx; SkShader::TileMode tmy; } kTileConfigs[] = { { SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode }, { SkShader::kRepeat_TileMode, SkShader::kClamp_TileMode }, { SkShader::kMirror_TileMode, SkShader::kRepeat_TileMode }, }; class PictureShaderGM : public skiagm::GM { public: PictureShaderGM(SkScalar tileSize, SkScalar sceneSize) : fTileSize(tileSize) , fSceneSize(sceneSize) { // Build the picture. SkPictureRecorder recorder; SkCanvas* pictureCanvas = recorder.beginRecording(tileSize, tileSize, NULL, 0); this->drawTile(pictureCanvas); fPicture.reset(recorder.endRecording()); // Build a reference bitmap. fBitmap.allocN32Pixels(SkScalarCeilToInt(tileSize), SkScalarCeilToInt(tileSize)); fBitmap.eraseColor(SK_ColorTRANSPARENT); SkCanvas bitmapCanvas(fBitmap); this->drawTile(&bitmapCanvas); } protected: SkString onShortName() SK_OVERRIDE { return SkString("pictureshader"); } SkISize onISize() SK_OVERRIDE { return SkISize::Make(1400, 1450); } void onDraw(SkCanvas* canvas) SK_OVERRIDE { this->drawSceneColumn(canvas, SkPoint::Make(0, 0), 1, 1, 0); this->drawSceneColumn(canvas, SkPoint::Make(0, fSceneSize * 6.4f), 1, 2, 0); this->drawSceneColumn(canvas, SkPoint::Make(fSceneSize * 2.4f, 0), 1, 1, 1); this->drawSceneColumn(canvas, SkPoint::Make(fSceneSize * 2.4f, fSceneSize * 6.4f), 1, 1, 2); this->drawSceneColumn(canvas, SkPoint::Make(fSceneSize * 4.8f, 0), 2, 1, 0); this->drawSceneColumn(canvas, SkPoint::Make(fSceneSize * 9.6f, 0), 2, 2, 0); // One last custom row to exercise negative scaling SkMatrix ctm, localMatrix; ctm.setTranslate(fSceneSize * 2.1f, fSceneSize * 13.8f); ctm.preScale(-1, -1); localMatrix.setScale(2, 2); this->drawScene(canvas, ctm, localMatrix, 0); ctm.setTranslate(fSceneSize * 2.4f, fSceneSize * 12.8f); localMatrix.setScale(-1, -1); this->drawScene(canvas, ctm, localMatrix, 0); ctm.setTranslate(fSceneSize * 4.8f, fSceneSize * 12.3f); ctm.preScale(2, 2); this->drawScene(canvas, ctm, localMatrix, 0); ctm.setTranslate(fSceneSize * 13.8f, fSceneSize * 14.3f); ctm.preScale(-2, -2); localMatrix.setTranslate(fTileSize / 4, fTileSize / 4); localMatrix.preRotate(45); localMatrix.preScale(-2, -2); this->drawScene(canvas, ctm, localMatrix, 0); } private: void drawSceneColumn(SkCanvas* canvas, const SkPoint& pos, SkScalar scale, SkScalar localScale, unsigned tileMode) { SkMatrix ctm, localMatrix; ctm.setTranslate(pos.x(), pos.y()); ctm.preScale(scale, scale); localMatrix.setScale(localScale, localScale); this->drawScene(canvas, ctm, localMatrix, tileMode); ctm.setTranslate(pos.x(), pos.y() + fSceneSize * 1.2f * scale); ctm.preScale(scale, scale); localMatrix.setTranslate(fTileSize / 4, fTileSize / 4); localMatrix.preScale(localScale, localScale); this->drawScene(canvas, ctm, localMatrix, tileMode); ctm.setTranslate(pos.x(), pos.y() + fSceneSize * 2.4f * scale); ctm.preScale(scale, scale); localMatrix.setRotate(45); localMatrix.preScale(localScale, localScale); this->drawScene(canvas, ctm, localMatrix, tileMode); ctm.setTranslate(pos.x(), pos.y() + fSceneSize * 3.6f * scale); ctm.preScale(scale, scale); localMatrix.setSkew(1, 0); localMatrix.preScale(localScale, localScale); this->drawScene(canvas, ctm, localMatrix, tileMode); ctm.setTranslate(pos.x(), pos.y() + fSceneSize * 4.8f * scale); ctm.preScale(scale, scale); localMatrix.setTranslate(fTileSize / 4, fTileSize / 4); localMatrix.preRotate(45); localMatrix.preScale(localScale, localScale); this->drawScene(canvas, ctm, localMatrix, tileMode); } void drawTile(SkCanvas* canvas) { SkPaint paint; paint.setColor(SK_ColorGREEN); paint.setStyle(SkPaint::kFill_Style); paint.setAntiAlias(true); canvas->drawCircle(fTileSize / 4, fTileSize / 4, fTileSize / 4, paint); canvas->drawRect(SkRect::MakeXYWH(fTileSize / 2, fTileSize / 2, fTileSize / 2, fTileSize / 2), paint); paint.setColor(SK_ColorRED); canvas->drawLine(fTileSize / 2, fTileSize * 1 / 3, fTileSize / 2, fTileSize * 2 / 3, paint); canvas->drawLine(fTileSize * 1 / 3, fTileSize / 2, fTileSize * 2 / 3, fTileSize / 2, paint); } void drawScene(SkCanvas* canvas, const SkMatrix& matrix, const SkMatrix& localMatrix, unsigned tileMode) { SkASSERT(tileMode < SK_ARRAY_COUNT(kTileConfigs)); SkPaint paint; paint.setStyle(SkPaint::kFill_Style); paint.setColor(SK_ColorLTGRAY); canvas->save(); canvas->concat(matrix); canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint); canvas->drawRect(SkRect::MakeXYWH(fSceneSize * 1.1f, 0, fSceneSize, fSceneSize), paint); SkAutoTUnref pictureShader(SkShader::CreatePictureShader( fPicture, kTileConfigs[tileMode].tmx, kTileConfigs[tileMode].tmy, &localMatrix, NULL)); paint.setShader(pictureShader.get()); canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint); canvas->translate(fSceneSize * 1.1f, 0); SkAutoTUnref bitmapShader(SkShader::CreateBitmapShader( fBitmap, kTileConfigs[tileMode].tmx, kTileConfigs[tileMode].tmy, &localMatrix)); paint.setShader(bitmapShader.get()); canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint); canvas->restore(); } SkScalar fTileSize; SkScalar fSceneSize; SkAutoTUnref fPicture; SkBitmap fBitmap; typedef GM INHERITED; }; DEF_GM( return SkNEW_ARGS(PictureShaderGM, (50, 100)); )