зеркало из https://github.com/mozilla/moz-skia.git
109 строки
3.2 KiB
C++
109 строки
3.2 KiB
C++
#include "gm.h"
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namespace skiagm {
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class Poly2PolyGM : public GM {
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public:
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Poly2PolyGM() {}
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protected:
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virtual SkString onShortName() {
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return SkString("poly2poly");
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}
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virtual SkISize onISize() {
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return make_isize(835, 840);
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}
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void drawBG(SkCanvas* canvas) {
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canvas->drawColor(SK_ColorWHITE);
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}
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static void doDraw(SkCanvas* canvas, 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 = SkIntToScalar(64);
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canvas->drawRectCoords(0, 0, 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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SkPaint::FontMetrics fm;
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paint->getFontMetrics(&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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float y = D/2 - (fm.fAscent + fm.fDescent)/2;
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SkString str;
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str.appendS32(count);
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canvas->drawText(str.c_str(), str.size(), x, y, *paint);
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canvas->restore();
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}
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virtual void onDraw(SkCanvas* canvas) {
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this->drawBG(canvas);
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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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paint.setTextSize(SkIntToScalar(40));
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paint.setTextAlign(SkPaint::kCenter_Align);
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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, &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, &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, &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, &paint, src4, dst4, 4);
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canvas->restore();
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}
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private:
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory(void*) { return new Poly2PolyGM; }
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static GMRegistry reg(MyFactory);
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}
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