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- /*
- * 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 "include/core/SkBitmap.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColorFilter.h"
- #include "include/core/SkColorPriv.h"
- #include "include/core/SkFont.h"
- #include "include/core/SkGraphics.h"
- #include "include/core/SkPath.h"
- #include "include/core/SkRegion.h"
- #include "include/core/SkShader.h"
- #include "include/core/SkTime.h"
- #include "include/core/SkTypeface.h"
- #include "include/effects/SkCornerPathEffect.h"
- #include "include/effects/SkGradientShader.h"
- #include "include/utils/SkRandom.h"
- #include "include/utils/SkTextUtils.h"
- #include "samplecode/Sample.h"
- #include "src/core/SkBlurMask.h"
- #include "src/utils/SkUTF.h"
- #include "include/core/SkColorPriv.h"
- #include "include/core/SkStream.h"
- #include "include/effects/SkBlurMaskFilter.h"
- static void setNamedTypeface(SkFont* font, const char name[]) {
- font->setTypeface(SkTypeface::MakeFromName(name, SkFontStyle()));
- }
- static uint16_t gBG[] = { 0xFFFF, 0xCCCF, 0xCCCF, 0xFFFF };
- class XfermodesBlurView : public Sample {
- SkBitmap fBG;
- SkBitmap fSrcB, fDstB;
- void draw_mode(SkCanvas* canvas, SkBlendMode mode, int alpha, SkScalar x, SkScalar y) {
- SkPaint p;
- p.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle,
- SkBlurMask::ConvertRadiusToSigma(5)));
- SkScalar ww = SkIntToScalar(W);
- SkScalar hh = SkIntToScalar(H);
- // draw a circle covering the upper
- // left three quarters of the canvas
- p.setColor(0xFFCC44FF);
- SkRect r;
- r.set(0, 0, ww*3/4, hh*3/4);
- r.offset(x, y);
- canvas->drawOval(r, p);
- p.setBlendMode(mode);
- // draw a square overlapping the circle
- // in the lower right of the canvas
- p.setColor(0x00AA6633 | alpha << 24);
- r.set(ww/3, hh/3, ww*19/20, hh*19/20);
- r.offset(x, y);
- canvas->drawRect(r, p);
- }
- public:
- const static int W = 64;
- const static int H = 64;
- XfermodesBlurView() {
- fBG.installPixels(SkImageInfo::Make(2, 2, kARGB_4444_SkColorType, kPremul_SkAlphaType),
- gBG, 4);
- }
- protected:
- virtual SkString name() { return SkString("XfermodesBlur"); }
- virtual void onDrawContent(SkCanvas* canvas) {
- canvas->translate(SkIntToScalar(10), SkIntToScalar(20));
- const SkBlendMode gModes[] = {
- SkBlendMode::kClear,
- SkBlendMode::kSrc,
- SkBlendMode::kDst,
- SkBlendMode::kSrcOver,
- SkBlendMode::kDstOver,
- SkBlendMode::kSrcIn,
- SkBlendMode::kDstIn,
- SkBlendMode::kSrcOut,
- SkBlendMode::kDstOut,
- SkBlendMode::kSrcATop,
- SkBlendMode::kDstATop,
- SkBlendMode::kXor,
- SkBlendMode::kPlus,
- };
- const SkScalar w = SkIntToScalar(W);
- const SkScalar h = SkIntToScalar(H);
- SkMatrix m;
- m.setScale(SkIntToScalar(6), SkIntToScalar(6));
- auto s = fBG.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat, &m);
- SkFont font;
- font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
- setNamedTypeface(&font, "Menlo Regular");
- const int W = 5;
- SkScalar x0 = 0;
- for (int twice = 0; twice < 2; twice++) {
- SkScalar x = x0, y = 0;
- for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++) {
- SkRect r;
- r.set(x, y, x+w, y+h);
- SkPaint p;
- p.setStyle(SkPaint::kFill_Style);
- p.setShader(s);
- canvas->drawRect(r, p);
- canvas->saveLayer(&r, nullptr);
- draw_mode(canvas, gModes[i], twice ? 0x88 : 0xFF, r.fLeft, r.fTop);
- canvas->restore();
- r.inset(-SK_ScalarHalf, -SK_ScalarHalf);
- p.setStyle(SkPaint::kStroke_Style);
- p.setShader(nullptr);
- canvas->drawRect(r, p);
- const char* label = SkBlendMode_Name(gModes[i]);
- SkTextUtils::DrawString(canvas, label, x + w/2, y - font.getSize()/2, font, SkPaint(),
- SkTextUtils::kCenter_Align);
- x += w + SkIntToScalar(10);
- if ((i % W) == W - 1) {
- x = x0;
- y += h + SkIntToScalar(30);
- }
- }
- x0 += SkIntToScalar(400);
- }
- }
- private:
- typedef Sample INHERITED;
- };
- //////////////////////////////////////////////////////////////////////////////
- DEF_SAMPLE( return new XfermodesBlurView(); )
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