diff options
Diffstat (limited to 'chromium/third_party/skia/samplecode/SampleXfermodesBlur.cpp')
| -rw-r--r-- | chromium/third_party/skia/samplecode/SampleXfermodesBlur.cpp | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/chromium/third_party/skia/samplecode/SampleXfermodesBlur.cpp b/chromium/third_party/skia/samplecode/SampleXfermodesBlur.cpp new file mode 100644 index 00000000000..fff4bed0a4b --- /dev/null +++ b/chromium/third_party/skia/samplecode/SampleXfermodesBlur.cpp @@ -0,0 +1,210 @@ +/* + * 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 "SampleCode.h" +#include "SkView.h" +#include "SkBlurMask.h" +#include "SkCanvas.h" +#include "SkCornerPathEffect.h" +#include "SkGradientShader.h" +#include "SkGraphics.h" +#include "SkImageDecoder.h" +#include "SkPath.h" +#include "SkRandom.h" +#include "SkRegion.h" +#include "SkShader.h" +#include "SkUtils.h" +#include "SkColorPriv.h" +#include "SkColorFilter.h" +#include "SkTime.h" +#include "SkTypeface.h" +#include "SkXfermode.h" + +#include "SkStream.h" +#include "SkXMLParser.h" +#include "SkColorPriv.h" +#include "SkImageDecoder.h" +#include "SkBlurMaskFilter.h" + +static void setNamedTypeface(SkPaint* paint, const char name[]) { + SkTypeface* face = SkTypeface::CreateFromName(name, SkTypeface::kNormal); + paint->setTypeface(face); + SkSafeUnref(face); +} + +static uint16_t gBG[] = { 0xFFFF, 0xCCCF, 0xCCCF, 0xFFFF }; + +class XfermodesBlurView : public SampleView { + SkBitmap fBG; + SkBitmap fSrcB, fDstB; + + void draw_mode(SkCanvas* canvas, SkXfermode* mode, int alpha, + SkScalar x, SkScalar y) { + SkPaint p; + SkMaskFilter* mf = SkBlurMaskFilter::Create(kNormal_SkBlurStyle, + SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5)), + SkBlurMaskFilter::kNone_BlurFlag); + p.setMaskFilter(mf)->unref(); + + 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.setXfermode(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: + // overrides from SkEventSink + virtual bool onQuery(SkEvent* evt) { + if (SampleCode::TitleQ(*evt)) { + SampleCode::TitleR(evt, "XfermodesBlur"); + return true; + } + return this->INHERITED::onQuery(evt); + } + + virtual void onDrawContent(SkCanvas* canvas) { + canvas->translate(SkIntToScalar(10), SkIntToScalar(20)); + + if (false) { + SkPaint paint; + paint.setAntiAlias(true); + paint.setTextSize(50); + paint.setTypeface(SkTypeface::CreateFromName("Arial Unicode MS", SkTypeface::kNormal)); + SkSafeUnref(paint.getTypeface()); + char buffer[10]; + size_t len = SkUTF8_FromUnichar(0x8500, buffer); + canvas->drawText(buffer, len, 40, 40, paint); + return; + } + if (false) { + SkPaint paint; + paint.setAntiAlias(true); + + SkRect r0 = { 0, 0, 10.5f, 20 }; + SkRect r1 = { 10.5f, 10, 20, 30 }; + paint.setColor(SK_ColorRED); + canvas->drawRect(r0, paint); + paint.setColor(SK_ColorBLUE); + canvas->drawRect(r1, paint); + return; + } + + const struct { + SkXfermode::Mode fMode; + const char* fLabel; + } gModes[] = { + { SkXfermode::kClear_Mode, "Clear" }, + { SkXfermode::kSrc_Mode, "Src" }, + { SkXfermode::kDst_Mode, "Dst" }, + { SkXfermode::kSrcOver_Mode, "SrcOver" }, + { SkXfermode::kDstOver_Mode, "DstOver" }, + { SkXfermode::kSrcIn_Mode, "SrcIn" }, + { SkXfermode::kDstIn_Mode, "DstIn" }, + { SkXfermode::kSrcOut_Mode, "SrcOut" }, + { SkXfermode::kDstOut_Mode, "DstOut" }, + { SkXfermode::kSrcATop_Mode, "SrcATop" }, + { SkXfermode::kDstATop_Mode, "DstATop" }, + { SkXfermode::kXor_Mode, "Xor" }, + + { SkXfermode::kPlus_Mode, "Plus" }, + /*{ SkXfermode::kModulate_Mode, "Modulate" }, + { SkXfermode::kScreen_Mode, "Screen" }, + { SkXfermode::kOverlay_Mode, "Overlay" }, + { SkXfermode::kDarken_Mode, "Darken" }, + { SkXfermode::kLighten_Mode, "Lighten" }, + { SkXfermode::kColorDodge_Mode, "ColorDodge" }, + { SkXfermode::kColorBurn_Mode, "ColorBurn" }, + { SkXfermode::kHardLight_Mode, "HardLight" }, + { SkXfermode::kSoftLight_Mode, "SoftLight" }, + { SkXfermode::kDifference_Mode, "Difference" }, + { SkXfermode::kExclusion_Mode, "Exclusion" },*/ + }; + + const SkScalar w = SkIntToScalar(W); + const SkScalar h = SkIntToScalar(H); + SkMatrix m; + m.setScale(SkIntToScalar(6), SkIntToScalar(6)); + SkShader* s = SkShader::CreateBitmapShader(fBG, + SkShader::kRepeat_TileMode, + SkShader::kRepeat_TileMode, + &m); + + SkPaint labelP; + labelP.setAntiAlias(true); + labelP.setLCDRenderText(true); + labelP.setTextAlign(SkPaint::kCenter_Align); + setNamedTypeface(&labelP, "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++) { + SkXfermode* mode = SkXfermode::Create(gModes[i].fMode); + SkAutoUnref aur(mode); + 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, NULL); + draw_mode(canvas, mode, twice ? 0x88 : 0xFF, r.fLeft, r.fTop); + canvas->restore(); + + r.inset(-SK_ScalarHalf, -SK_ScalarHalf); + p.setStyle(SkPaint::kStroke_Style); + p.setShader(NULL); + canvas->drawRect(r, p); + + canvas->drawText(gModes[i].fLabel, strlen(gModes[i].fLabel), + x + w/2, y - labelP.getTextSize()/2, labelP); + x += w + SkIntToScalar(10); + if ((i % W) == W - 1) { + x = x0; + y += h + SkIntToScalar(30); + } + } + x0 += SkIntToScalar(400); + } + s->unref(); + } + +private: + typedef SampleView INHERITED; +}; + +////////////////////////////////////////////////////////////////////////////// + +static SkView* MyFactory() { return new XfermodesBlurView; } +static SkViewRegister reg(MyFactory); |