зеркало из https://github.com/mozilla/moz-skia.git
147 строки
4.6 KiB
C++
147 строки
4.6 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.h"
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#include "SkCanvas.h"
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#include "SkGradientShader.h"
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#include "SkUnitMappers.h"
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namespace skiagm {
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static void makebm(SkBitmap* bm, int w, int h) {
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bm->allocN32Pixels(w, h);
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bm->eraseColor(SK_ColorTRANSPARENT);
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SkCanvas canvas(*bm);
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SkScalar s = SkIntToScalar(SkMin32(w, h));
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static const SkPoint kPts0[] = { { 0, 0 }, { s, s } };
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static const SkPoint kPts1[] = { { s/2, 0 }, { s/2, s } };
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static const SkScalar kPos[] = { 0, SK_Scalar1/2, SK_Scalar1 };
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static const SkColor kColors0[] = {0x80F00080, 0xF0F08000, 0x800080F0 };
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static const SkColor kColors1[] = {0xF08000F0, 0x8080F000, 0xF000F080 };
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SkPaint paint;
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SkUnitMapper* um = NULL;
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um = new SkCosineMapper;
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SkAutoUnref au(um);
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paint.setShader(SkGradientShader::CreateLinear(kPts0, kColors0, kPos,
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SK_ARRAY_COUNT(kColors0), SkShader::kClamp_TileMode, um))->unref();
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canvas.drawPaint(paint);
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paint.setShader(SkGradientShader::CreateLinear(kPts1, kColors1, kPos,
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SK_ARRAY_COUNT(kColors1), SkShader::kClamp_TileMode))->unref();
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canvas.drawPaint(paint);
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}
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///////////////////////////////////////////////////////////////////////////////
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struct LabeledMatrix {
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SkMatrix fMatrix;
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const char* fLabel;
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};
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static const char kText[] = "B";
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static const int kTextLen = SK_ARRAY_COUNT(kText) - 1;
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static const int kPointSize = 300;
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class ShaderText3GM : public GM {
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public:
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ShaderText3GM() {
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this->setBGColor(0xFFDDDDDD);
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}
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protected:
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virtual uint32_t onGetFlags() const SK_OVERRIDE {
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return kSkipTiled_Flag;
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}
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virtual SkString onShortName() SK_OVERRIDE {
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return SkString("shadertext3");
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}
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virtual SkISize onISize() SK_OVERRIDE{ return make_isize(800, 1000); }
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virtual void onOnceBeforeDraw() SK_OVERRIDE {
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makebm(&fBmp, kPointSize / 4, kPointSize / 4);
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}
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virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
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SkPaint bmpPaint;
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bmpPaint.setAntiAlias(true);
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bmpPaint.setFilterLevel(SkPaint::kLow_FilterLevel);
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bmpPaint.setAlpha(0x80);
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canvas->drawBitmap(fBmp, 5.f, 5.f, &bmpPaint);
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SkPaint outlinePaint;
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outlinePaint.setAntiAlias(true);
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outlinePaint.setTextSize(SkIntToScalar(kPointSize));
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outlinePaint.setStyle(SkPaint::kStroke_Style);
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outlinePaint.setStrokeWidth(0.f);
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canvas->translate(15.f, 15.f);
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// draw glyphs scaled up
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canvas->scale(2.f, 2.f);
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static const SkShader::TileMode kTileModes[] = {
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SkShader::kRepeat_TileMode,
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SkShader::kMirror_TileMode,
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};
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// position the baseline of the first run
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canvas->translate(0.f, 0.75f * kPointSize);
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canvas->save();
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int i = 0;
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for (size_t tm0 = 0; tm0 < SK_ARRAY_COUNT(kTileModes); ++tm0) {
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for (size_t tm1 = 0; tm1 < SK_ARRAY_COUNT(kTileModes); ++tm1) {
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SkMatrix localM;
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localM.setTranslate(5.f, 5.f);
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localM.postRotate(20);
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localM.postScale(1.15f, .85f);
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SkAutoTUnref<SkShader> shader(SkShader::CreateBitmapShader(fBmp,
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kTileModes[tm0],
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kTileModes[tm1],
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&localM));
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SkPaint fillPaint;
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fillPaint.setAntiAlias(true);
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fillPaint.setTextSize(SkIntToScalar(kPointSize));
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fillPaint.setFilterLevel(SkPaint::kLow_FilterLevel);
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fillPaint.setShader(shader);
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canvas->drawText(kText, kTextLen, 0, 0, fillPaint);
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canvas->drawText(kText, kTextLen, 0, 0, outlinePaint);
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SkScalar w = fillPaint.measureText(kText, kTextLen);
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canvas->translate(w + 10.f, 0.f);
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++i;
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if (!(i % 2)) {
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canvas->restore();
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canvas->translate(0, 0.75f * kPointSize);
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canvas->save();
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}
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}
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}
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canvas->restore();
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}
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private:
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SkBitmap fBmp;
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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 ShaderText3GM; }
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static GMRegistry reg(MyFactory);
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}
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