Пример #1
0
    virtual void onDrawContent(SkCanvas* canvas) {
        canvas->translate(SkIntToScalar(10), SkIntToScalar(20));

        if (false) {
            SkPaint paint;
            paint.setAntiAlias(true);
            paint.setTextSize(50);
            paint.setTypeface(SkTypeface::MakeFromName("Arial Unicode MS", SkFontStyle()));
            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 {
            SkBlendMode fMode;
            const char* fLabel;
        } gModes[] = {
            { SkBlendMode::kClear,    "Clear"     },
            { SkBlendMode::kSrc,      "Src"       },
            { SkBlendMode::kDst,      "Dst"       },
            { SkBlendMode::kSrcOver,  "SrcOver"   },
            { SkBlendMode::kDstOver,  "DstOver"   },
            { SkBlendMode::kSrcIn,    "SrcIn"     },
            { SkBlendMode::kDstIn,    "DstIn"     },
            { SkBlendMode::kSrcOut,   "SrcOut"    },
            { SkBlendMode::kDstOut,   "DstOut"    },
            { SkBlendMode::kSrcATop,  "SrcATop"   },
            { SkBlendMode::kDstATop,  "DstATop"   },
            { SkBlendMode::kXor,      "Xor"       },

            { SkBlendMode::kPlus,     "Plus"          },
        };

        const SkScalar w = SkIntToScalar(W);
        const SkScalar h = SkIntToScalar(H);
        SkMatrix m;
        m.setScale(SkIntToScalar(6), SkIntToScalar(6));
        auto s = SkShader::MakeBitmapShader(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++) {
                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].fMode, 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);

                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);
        }
    }
Пример #2
0
    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);
        SkShader* s = SkShader::CreateBitmapShader(fBG,
                                                   SkShader::kRepeat_TileMode,
                                                   SkShader::kRepeat_TileMode);
        SkMatrix m;
        m.setScale(SkIntToScalar(6), SkIntToScalar(6));
        s->setLocalMatrix(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();
    }