147 lines
4.4 KiB
C++
147 lines
4.4 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/SkBitmap.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/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/SkScalar.h"
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#include "include/core/SkShader.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/SkTileMode.h"
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#include "include/core/SkTypeface.h"
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#include "include/core/SkTypes.h"
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#include "include/effects/SkGradientShader.h"
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#include "tools/ToolUtils.h"
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#include <string.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(std::min(w, h));
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const SkPoint kPts0[] = { { 0, 0 }, { s, s } };
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const SkPoint kPts1[] = { { s/2, 0 }, { s/2, s } };
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const SkScalar kPos[] = { 0, SK_Scalar1/2, SK_Scalar1 };
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const SkColor kColors0[] = {0x80F00080, 0xF0F08000, 0x800080F0 };
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const SkColor kColors1[] = {0xF08000F0, 0x8080F000, 0xF000F080 };
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SkPaint paint;
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paint.setShader(SkGradientShader::MakeLinear(kPts0, kColors0, kPos,
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SK_ARRAY_COUNT(kColors0), SkTileMode::kClamp));
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canvas.drawPaint(paint);
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paint.setShader(SkGradientShader::MakeLinear(kPts1, kColors1, kPos,
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SK_ARRAY_COUNT(kColors1), SkTileMode::kClamp));
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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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constexpr 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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SkString onShortName() override {
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return SkString("shadertext3");
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}
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SkISize onISize() override { return SkISize::Make(820, 930); }
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void onOnceBeforeDraw() override {
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makebm(&fBmp, kPointSize / 4, kPointSize / 4);
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}
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void onDraw(SkCanvas* canvas) override {
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SkPaint bmpPaint;
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bmpPaint.setAntiAlias(true);
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bmpPaint.setAlphaf(0.5f);
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SkSamplingOptions sampling(SkFilterMode::kLinear);
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canvas->drawImage(fBmp.asImage(), 5.f, 5.f, sampling, &bmpPaint);
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SkFont font(ToolUtils::create_portable_typeface(), SkIntToScalar(kPointSize));
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SkPaint outlinePaint;
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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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constexpr SkTileMode kTileModes[] = {
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SkTileMode::kRepeat,
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SkTileMode::kMirror,
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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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SkPaint fillPaint;
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fillPaint.setAntiAlias(true);
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fillPaint.setShader(fBmp.makeShader(kTileModes[tm0], kTileModes[tm1],
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sampling, localM));
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constexpr char kText[] = "B";
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canvas->drawString(kText, 0, 0, font, fillPaint);
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canvas->drawString(kText, 0, 0, font, outlinePaint);
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SkScalar w = font.measureText(kText, strlen(kText), SkTextEncoding::kUTF8);
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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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using INHERITED = GM;
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};
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///////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new ShaderText3GM; )
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} // namespace skiagm
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