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