зеркало из https://github.com/mozilla/moz-skia.git
104 строки
3.0 KiB
C++
104 строки
3.0 KiB
C++
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/*
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* Copyright 2012 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 "SkBitmap.h"
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#include "SkCanvas.h"
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#include "SkColor.h"
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#include "SkMatrix.h"
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#include "SkPath.h"
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#include "SkRect.h"
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#include "SkSize.h"
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#include "SkString.h"
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namespace skiagm {
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class DrawBitmapMatrixGM : public GM {
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public:
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DrawBitmapMatrixGM() {}
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protected:
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virtual SkString onShortName() SK_OVERRIDE {
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return SkString("drawbitmapmatrix");
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}
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virtual SkISize onISize() SK_OVERRIDE { return make_isize(1024, 256); }
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virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
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SkBitmap bm;
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this->setupBitmap(&bm);
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// Draw normally.
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SkMatrix matrix;
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matrix.reset();
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setDither(true);
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canvas->drawBitmapMatrix(bm, matrix, &paint);
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// Draw stretched horizontally and squished vertically.
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canvas->translate(SkIntToScalar(bm.width() + 5), 0);
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matrix.setScale(SkIntToScalar(2), SK_ScalarHalf);
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canvas->drawBitmapMatrix(bm, matrix, &paint);
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// Draw rotated
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canvas->translate(SkIntToScalar(bm.width()*2 + 5), 0);
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matrix.reset();
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matrix.setRotate(SkIntToScalar(45), SkIntToScalar(bm.width() / 2),
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SkIntToScalar(bm.height() / 2));
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canvas->save();
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canvas->translate(0, SkIntToScalar(10));
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canvas->drawBitmapMatrix(bm, matrix, &paint);
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canvas->restore();
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// Draw with perspective
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canvas->translate(SkIntToScalar(bm.width() + 15), 0);
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matrix.reset();
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matrix.setPerspX(SkScalarDiv(SK_Scalar1, SkIntToScalar(1000)));
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matrix.setPerspY(SkScalarDiv(SK_Scalar1, SkIntToScalar(1000)));
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canvas->drawBitmapMatrix(bm, matrix, &paint);
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// Draw with skew
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canvas->translate(SkIntToScalar(bm.width() + 5), 0);
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matrix.reset();
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matrix.setSkew(SkIntToScalar(2), SkIntToScalar(2));
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canvas->drawBitmapMatrix(bm, matrix, &paint);
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// Draw with sin/cos
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canvas->translate(SkIntToScalar(bm.width() * 4), 0);
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matrix.reset();
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matrix.setSinCos(SK_ScalarHalf, SkIntToScalar(2));
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canvas->drawBitmapMatrix(bm, matrix, &paint);
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}
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private:
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void setupBitmap(SkBitmap* bm) {
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SkASSERT(bm);
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static const int SIZE = 64;
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bm->setConfig(SkBitmap::kARGB_8888_Config, SIZE, SIZE);
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bm->allocPixels();
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SkCanvas canvas(*bm);
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SkPaint paint;
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paint.setColor(SK_ColorGREEN);
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canvas.drawPaint(paint);
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paint.setColor(SK_ColorBLUE);
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paint.setAntiAlias(true);
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SkRect rect = SkRect::MakeWH(SkIntToScalar(SIZE), SkIntToScalar(SIZE));
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SkPath path;
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path.addOval(rect);
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canvas.drawPath(path, paint);
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}
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};
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////////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory(void*) { return new DrawBitmapMatrixGM; }
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static GMRegistry reg(MyFactory);
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}
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