126 lines
3.8 KiB
C++
126 lines
3.8 KiB
C++
/*
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* Copyright 2011 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/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkFont.h"
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#include "include/core/SkFontMetrics.h"
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#include "include/core/SkFontTypes.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/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/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/core/SkTypeface.h"
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#include "include/utils/SkTextUtils.h"
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#include "tools/Resources.h"
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#include <stdint.h>
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class Poly2PolyGM : public skiagm::GM {
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public:
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Poly2PolyGM() {}
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protected:
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SkString onShortName() override {
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return SkString("poly2poly");
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}
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SkISize onISize() override {
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return SkISize::Make(835, 840);
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}
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static void doDraw(SkCanvas* canvas, const SkFont& font, SkPaint* paint, const int isrc[],
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const int idst[], int count) {
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SkMatrix matrix;
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SkPoint src[4], dst[4];
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for (int i = 0; i < count; i++) {
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src[i].set(SkIntToScalar(isrc[2*i+0]), SkIntToScalar(isrc[2*i+1]));
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dst[i].set(SkIntToScalar(idst[2*i+0]), SkIntToScalar(idst[2*i+1]));
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}
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canvas->save();
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matrix.setPolyToPoly(src, dst, count);
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canvas->concat(matrix);
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paint->setColor(SK_ColorGRAY);
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paint->setStyle(SkPaint::kStroke_Style);
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const SkScalar D = 64;
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canvas->drawRect(SkRect::MakeWH(D, D), *paint);
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canvas->drawLine(0, 0, D, D, *paint);
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canvas->drawLine(0, D, D, 0, *paint);
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SkFontMetrics fm;
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font.getMetrics(&fm);
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paint->setColor(SK_ColorRED);
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paint->setStyle(SkPaint::kFill_Style);
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SkScalar x = D/2;
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SkScalar y = D/2 - (fm.fAscent + fm.fDescent)/2;
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uint16_t glyphID = 3; // X
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SkTextUtils::Draw(canvas, &glyphID, sizeof(glyphID), SkTextEncoding::kGlyphID, x, y,
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font, *paint, SkTextUtils::kCenter_Align);
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canvas->restore();
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}
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void onOnceBeforeDraw() override {
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fEmFace = MakeResourceAsTypeface("fonts/Em.ttf");
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}
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void onDraw(SkCanvas* canvas) override {
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStrokeWidth(SkIntToScalar(4));
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SkFont font(fEmFace, 40);
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canvas->save();
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canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
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// translate (1 point)
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const int src1[] = { 0, 0 };
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const int dst1[] = { 5, 5 };
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doDraw(canvas, font, &paint, src1, dst1, 1);
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canvas->restore();
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canvas->save();
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canvas->translate(SkIntToScalar(160), SkIntToScalar(10));
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// rotate/uniform-scale (2 points)
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const int src2[] = { 32, 32, 64, 32 };
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const int dst2[] = { 32, 32, 64, 48 };
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doDraw(canvas, font, &paint, src2, dst2, 2);
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canvas->restore();
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canvas->save();
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canvas->translate(SkIntToScalar(10), SkIntToScalar(110));
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// rotate/skew (3 points)
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const int src3[] = { 0, 0, 64, 0, 0, 64 };
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const int dst3[] = { 0, 0, 96, 0, 24, 64 };
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doDraw(canvas, font, &paint, src3, dst3, 3);
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canvas->restore();
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canvas->save();
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canvas->translate(SkIntToScalar(160), SkIntToScalar(110));
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// perspective (4 points)
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const int src4[] = { 0, 0, 64, 0, 64, 64, 0, 64 };
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const int dst4[] = { 0, 0, 96, 0, 64, 96, 0, 64 };
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doDraw(canvas, font, &paint, src4, dst4, 4);
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canvas->restore();
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}
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private:
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using INHERITED = skiagm::GM;
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sk_sp<SkTypeface> fEmFace;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new Poly2PolyGM; )
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