C++ SkPaint::getColor方法代码示例

SkPaint SkColorSpaceXformer::apply(const SkPaint& src) {
    const AutoCachePurge autoPurge(this);

    SkPaint dst = src;

    // All SkColorSpaces have the same black point.
    if (src.getColor() & 0xffffff) {
        dst.setColor(this->apply(src.getColor()));
    }

    if (auto shader = src.getShader()) {
        dst.setShader(this->apply(shader));
    }

    if (auto cf = src.getColorFilter()) {
        dst.setColorFilter(this->apply(cf));
    }

    if (auto looper = src.getDrawLooper()) {
        dst.setDrawLooper(looper->makeColorSpace(this));
    }

    if (auto imageFilter = src.getImageFilter()) {
        dst.setImageFilter(this->apply(imageFilter));
    }

    return dst;
}

bool SkPaint2GrPaint(GrContext* context, GrRenderTarget* rt, const SkPaint& skPaint,
                     const SkMatrix& viewM, bool constantColor, GrPaint* grPaint) {
    SkShader* shader = skPaint.getShader();
    if (NULL == shader) {
        return SkPaint2GrPaintNoShader(context, rt, skPaint, SkColor2GrColor(skPaint.getColor()),
                                       constantColor, grPaint);
    }

    GrColor paintColor = SkColor2GrColor(skPaint.getColor());

    // Start a new block here in order to preserve our context state after calling
    // asFragmentProcessor(). Since these calls get passed back to the client, we don't really
    // want them messing around with the context.
    {
        // Allow the shader to modify paintColor and also create an effect to be installed as
        // the first color effect on the GrPaint.
        GrFragmentProcessor* fp = NULL;
        if (!shader->asFragmentProcessor(context, skPaint, viewM, NULL, &paintColor,
                                         grPaint->getProcessorDataManager(), &fp)) {
            return false;
        }
        if (fp) {
            grPaint->addColorProcessor(fp)->unref();
            constantColor = false;
        }
    }

    // The grcolor is automatically set when calling asFragmentProcessor.
    // If the shader can be seen as an effect it returns true and adds its effect to the grpaint.
    return SkPaint2GrPaintNoShader(context, rt, skPaint, paintColor, constantColor, grPaint);
}

    bool onMatch(SkRecord* record, Pattern* pattern, unsigned begin, unsigned end) {
        SaveLayer* saveLayer = pattern->first<SaveLayer>();
        if (saveLayer->bounds != NULL) {
            // SaveLayer with bounds is too tricky for us.
            return false;
        }

        SkPaint* layerPaint = saveLayer->paint;
        if (NULL == layerPaint) {
            // There wasn't really any point to this SaveLayer at all.
            return KillSaveLayerAndRestore(record, begin);
        }

        SkPaint* drawPaint = pattern->second<SkPaint>();
        if (drawPaint == NULL) {
            // We can just give the draw the SaveLayer's paint.
            // TODO(mtklein): figure out how to do this clearly
            return false;
        }

        const uint32_t layerColor = layerPaint->getColor();
        const uint32_t  drawColor =  drawPaint->getColor();
        if (!IsOnlyAlpha(layerColor)  || !IsOpaque(drawColor) ||
            HasAnyEffect(*layerPaint) || HasAnyEffect(*drawPaint)) {
            // Too fancy for us.  Actually, as long as layerColor is just an alpha
            // we can blend it into drawColor's alpha; drawColor doesn't strictly have to be opaque.
            return false;
        }

        drawPaint->setColor(SkColorSetA(drawColor, SkColorGetA(layerColor)));
        return KillSaveLayerAndRestore(record, begin);
    }

bool SkBitmapProcShader::asFragmentProcessor(GrContext* context, const SkPaint& paint,
                                             const SkMatrix& viewM,
                                             const SkMatrix* localMatrix, GrColor* paintColor,
                                             GrProcessorDataManager* procDataManager,
                                             GrFragmentProcessor** fp) const {
    SkMatrix matrix;
    matrix.setIDiv(fRawBitmap.width(), fRawBitmap.height());

    SkMatrix lmInverse;
    if (!this->getLocalMatrix().invert(&lmInverse)) {
        return false;
    }
    if (localMatrix) {
        SkMatrix inv;
        if (!localMatrix->invert(&inv)) {
            return false;
        }
        lmInverse.postConcat(inv);
    }
    matrix.preConcat(lmInverse);

    SkShader::TileMode tm[] = {
        (TileMode)fTileModeX,
        (TileMode)fTileModeY,
    };

    // Must set wrap and filter on the sampler before requesting a texture. In two places below
    // we check the matrix scale factors to determine how to interpret the filter quality setting.
    // This completely ignores the complexity of the drawVertices case where explicit local coords
    // are provided by the caller.
    bool doBicubic;
    GrTextureParams::FilterMode textureFilterMode =
            GrSkFilterQualityToGrFilterMode(paint.getFilterQuality(), viewM, this->getLocalMatrix(),
                                            &doBicubic);
    GrTextureParams params(tm, textureFilterMode);
    SkAutoTUnref<GrTexture> texture(GrRefCachedBitmapTexture(context, fRawBitmap, &params));

    if (!texture) {
        SkErrorInternals::SetError( kInternalError_SkError,
                                    "Couldn't convert bitmap to texture.");
        return false;
    }

    *paintColor = (kAlpha_8_SkColorType == fRawBitmap.colorType()) ?
                                                SkColor2GrColor(paint.getColor()) :
                                                SkColor2GrColorJustAlpha(paint.getColor());

    if (doBicubic) {
        *fp = GrBicubicEffect::Create(procDataManager, texture, matrix, tm);
    } else {
        *fp = GrSimpleTextureEffect::Create(procDataManager, texture, matrix, params);
    }

    return true;
}

SkRGB16_Black_Blitter::SkRGB16_Black_Blitter(const SkPixmap& device, const SkPaint& paint)
    : INHERITED(device, paint) {
    SkASSERT(paint.getShader() == nullptr);
    SkASSERT(paint.getColorFilter() == nullptr);
    SkASSERT(paint.isSrcOver());
    SkASSERT(paint.getColor() == SK_ColorBLACK);
}

    void setup(const SkPixmap& dst, int left, int top, const SkPaint& paint) override {
        fDst  = dst;
        fLeft = left;
        fTop  = top;

        fPaintColor = SkColor4f_from_SkColor(paint.getColor(), fDst.colorSpace());

        SkRasterPipeline p(fAlloc);
        switch (fSource.colorType()) {
            case kAlpha_8_SkColorType:   p.append(SkRasterPipeline::load_a8,   &fSrcPtr); break;
            case kGray_8_SkColorType:    p.append(SkRasterPipeline::load_g8,   &fSrcPtr); break;
            case kRGB_565_SkColorType:   p.append(SkRasterPipeline::load_565,  &fSrcPtr); break;
            case kARGB_4444_SkColorType: p.append(SkRasterPipeline::load_4444, &fSrcPtr); break;
            case kBGRA_8888_SkColorType: p.append(SkRasterPipeline::load_bgra, &fSrcPtr); break;
            case kRGBA_8888_SkColorType: p.append(SkRasterPipeline::load_8888, &fSrcPtr); break;
            case kRGBA_F16_SkColorType:  p.append(SkRasterPipeline::load_f16,  &fSrcPtr); break;
            default: SkASSERT(false);
        }
        if (fDst.colorSpace() &&
                (!fSource.colorSpace() || fSource.colorSpace()->gammaCloseToSRGB())) {
            p.append_from_srgb(fSource.alphaType());
        }
        if (fSource.colorType() == kAlpha_8_SkColorType) {
            p.append(SkRasterPipeline::set_rgb, &fPaintColor);
            p.append(SkRasterPipeline::premul);
        }
        append_gamut_transform(&p, fAlloc,
                               fSource.colorSpace(), fDst.colorSpace(), kPremul_SkAlphaType);
        if (fPaintColor.fA != 1.0f) {
            p.append(SkRasterPipeline::scale_1_float, &fPaintColor.fA);
        }

        bool is_opaque = fSource.isOpaque() && fPaintColor.fA == 1.0f;
        fBlitter = SkCreateRasterPipelineBlitter(fDst, paint, p, is_opaque, fAlloc);
    }

SkARGB4444_Blitter::SkARGB4444_Blitter(const SkBitmap& device,
                                   const SkPaint& paint) : INHERITED(device) {
    // cache premultiplied versions in 4444
    SkPMColor c = SkPreMultiplyColor(paint.getColor());
    fPMColor16 = SkPixel32ToPixel4444(c);
    if (paint.isDither()) {
        fPMColor16Other = SkDitherPixel32To4444(c);
    } else {
        fPMColor16Other = fPMColor16;
    }

    // cache raw versions in 4444
    fRawColor16 = SkPackARGB4444(0xFF >> 4, SkColorGetR(c) >> 4,
                                 SkColorGetG(c) >> 4, SkColorGetB(c) >> 4);
    if (paint.isDither()) {
        fRawColor16Other = SkDitherARGB32To4444(0xFF, SkColorGetR(c),
                                                SkColorGetG(c), SkColorGetB(c));
    } else {
        fRawColor16Other = fRawColor16;
    }

    fScale16 = SkAlpha15To16(SkGetPackedA4444(fPMColor16Other));
    if (16 == fScale16) {
        // force the original to also be opaque
        fPMColor16 |= (0xF << SK_A4444_SHIFT);
    }
}

bool SkColorShader::setContext(const SkBitmap& device, const SkPaint& paint,
                               const SkMatrix& matrix) {
    if (!this->INHERITED::setContext(device, paint, matrix)) {
        return false;
    }

    SkColor c;
    unsigned a;
    
    if (fInheritColor) {
        c = paint.getColor();
        a = SkColorGetA(c);
    } else {
        c = fColor;
        a = SkAlphaMul(SkColorGetA(c), SkAlpha255To256(paint.getAlpha()));
    }

    unsigned r = SkColorGetR(c);
    unsigned g = SkColorGetG(c);
    unsigned b = SkColorGetB(c);

    // we want this before we apply any alpha
    fColor16 = SkPack888ToRGB16(r, g, b);

    if (a != 255) {
        a = SkAlpha255To256(a);
        r = SkAlphaMul(r, a);
        g = SkAlphaMul(g, a);
        b = SkAlphaMul(b, a);
    }
    fPMColor = SkPackARGB32(a, r, g, b);

    return true;
}

void SkOverdrawCanvas::onDrawPaint(const SkPaint& paint) {
    if (0 == paint.getColor() && !paint.getColorFilter() && !paint.getShader()) {
        // This is a clear, ignore it.
    } else {
        fList[0]->onDrawPaint(this->overdrawPaint(paint));
    }
}

void paintSkiaText(GraphicsContext* context,
                   HFONT hfont,
                   int numGlyphs,
                   const WORD* glyphs,
                   const int* advances,
                   const GOFFSET* offsets,
                   const SkPoint* origin)
{
    HDC dc = GetDC(0);
    HGDIOBJ oldFont = SelectObject(dc, hfont);

    PlatformContextSkia* platformContext = context->platformContext();
    SkCanvas* canvas = platformContext->canvas();
    TextDrawingModeFlags textMode = platformContext->getTextDrawingMode();

    // If platformContext is GPU-backed make its GL context current.
    platformContext->makeGrContextCurrent();

    // Filling (if necessary). This is the common case.
    SkPaint paint;
    platformContext->setupPaintForFilling(&paint);
    paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
    setupPaintForFont(hfont, &paint, platformContext);

    bool didFill = false;

    if ((textMode & TextModeFill) && (SkColorGetA(paint.getColor()) || paint.getLooper())) {
        skiaDrawText(canvas, *origin, &paint, &glyphs[0], &advances[0], &offsets[0], numGlyphs);
        didFill = true;
    }

    // Stroking on top (if necessary).
    if ((textMode & TextModeStroke)
        && platformContext->getStrokeStyle() != NoStroke
        && platformContext->getStrokeThickness() > 0) {

        paint.reset();
        platformContext->setupPaintForStroking(&paint, 0, 0);
        paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
        setupPaintForFont(hfont, &paint, platformContext);

        if (didFill) {
            // If there is a shadow and we filled above, there will already be
            // a shadow. We don't want to draw it again or it will be too dark
            // and it will go on top of the fill.
            //
            // Note that this isn't strictly correct, since the stroke could be
            // very thick and the shadow wouldn't account for this. The "right"
            // thing would be to draw to a new layer and then draw that layer
            // with a shadow. But this is a lot of extra work for something
            // that isn't normally an issue.
            paint.setLooper(0);
        }

        skiaDrawText(canvas, *origin, &paint, &glyphs[0], &advances[0], &offsets[0], numGlyphs);
    }

    SelectObject(dc, oldFont);
    ReleaseDC(0, dc);
}

static void lettersToBitmap2(SkBitmap* dst, const char chars[],
                            const SkPaint& original, SkBitmap::Config config) {
    SkPath path;
    SkScalar x = 0;
    SkScalar width;
    SkPath p;
    for (size_t i = 0; i < strlen(chars); i++) {
        original.getTextPath(&chars[i], 1, x, 0, &p);
        path.addPath(p);
        original.getTextWidths(&chars[i], 1, &width);
        x += width;
    }
    SkRect bounds = path.getBounds();
    SkScalar sw = -original.getStrokeWidth();
    bounds.inset(sw, sw);
    path.offset(-bounds.fLeft, -bounds.fTop);
    bounds.offset(-bounds.fLeft, -bounds.fTop);

    int w = SkScalarRound(bounds.width());
    int h = SkScalarRound(bounds.height());
    SkPaint paint(original);

    paint.setAntiAlias(true);
    paint.setXfermodeMode(SkXfermode::kDstATop_Mode);
    paint.setColor(original.getColor());
    paint.setStyle(SkPaint::kStroke_Style);

    dst->setConfig(config, w, h);
    dst->allocPixels();
    dst->eraseColor(SK_ColorWHITE);

    SkCanvas canvas(*dst);
    canvas.drawPath(path, paint);
}

SkRGB16_Black_Blitter::SkRGB16_Black_Blitter(const SkBitmap& device, const SkPaint& paint)
    : INHERITED(device, paint) {
    SkASSERT(paint.getShader() == NULL);
    SkASSERT(paint.getColorFilter() == NULL);
    SkASSERT(paint.getXfermode() == NULL);
    SkASSERT(paint.getColor() == SK_ColorBLACK);
}

// Check for:
//    SAVE_LAYER
//        SAVE
//            CLIP_RECT
//            DRAW_BITMAP_RECT_TO_RECT
//        RESTORE
//    RESTORE
// where the saveLayer's color can be moved into the drawBitmapRect
static bool check_1(SkDebugCanvas* canvas, int curCommand) {
    if (SAVE_LAYER != canvas->getDrawCommandAt(curCommand)->getType() ||
        canvas->getSize() <= curCommand+5 ||
        SAVE != canvas->getDrawCommandAt(curCommand+1)->getType() ||
        CLIP_RECT != canvas->getDrawCommandAt(curCommand+2)->getType() ||
        DRAW_BITMAP_RECT_TO_RECT != canvas->getDrawCommandAt(curCommand+3)->getType() ||
        RESTORE != canvas->getDrawCommandAt(curCommand+4)->getType() ||
        RESTORE != canvas->getDrawCommandAt(curCommand+5)->getType()) {
        return false;
    }

    SkSaveLayerCommand* saveLayer =
        (SkSaveLayerCommand*) canvas->getDrawCommandAt(curCommand);
    SkDrawBitmapRectCommand* dbmr =
        (SkDrawBitmapRectCommand*) canvas->getDrawCommandAt(curCommand+3);

    const SkPaint* saveLayerPaint = saveLayer->paint();
    SkPaint* dbmrPaint = dbmr->paint();

    // For this optimization we only fold the saveLayer and drawBitmapRect
    // together if the saveLayer's draw is simple (i.e., no fancy effects) and
    // and the only difference in the colors is that the saveLayer's can have
    // an alpha while the drawBitmapRect's is opaque.
    // TODO: it should be possible to fold them together even if they both
    // have different non-255 alphas but this is low priority since we have
    // never seen that case
    // If either operation lacks a paint then the collapse is trivial
    SkColor layerColor = saveLayerPaint->getColor() | 0xFF000000; // force opaque

    return NULL == saveLayerPaint ||
           NULL == dbmrPaint ||
           (is_simple(*saveLayerPaint) && dbmrPaint->getColor() == layerColor);
}

    void drawShadowedPath(SkCanvas* canvas, const SkPath& path,
                          const SkPoint3& zPlaneParams,
                          const SkPaint& paint, SkScalar ambientAlpha,
                          const SkPoint3& lightPos, SkScalar lightWidth, SkScalar spotAlpha) {
        if (!fShowAmbient) {
            ambientAlpha = 0;
        }
        if (!fShowSpot) {
            spotAlpha = 0;
        }
        uint32_t flags = 0;
        if (fUseAlt) {
            flags |= SkShadowFlags::kGeometricOnly_ShadowFlag;
        }
        SkShadowUtils::DrawShadow(canvas, path, zPlaneParams,
                                  lightPos, lightWidth,
                                  ambientAlpha, spotAlpha, SK_ColorBLACK, flags);

        if (fShowObject) {
            canvas->drawPath(path, paint);
        } else {
            SkPaint strokePaint;

            strokePaint.setColor(paint.getColor());
            strokePaint.setStyle(SkPaint::kStroke_Style);

            canvas->drawPath(path, strokePaint);
        }
    }

    virtual void onDraw(SkCanvas* canvas) {
        const SkIPoint dim = this->getSize();
        SkRandom rand;

        SkPaint paint(fPaint);
        this->setupPaint(&paint);
        // explicitly need these
        paint.setColor(fPaint.getColor());
        paint.setAntiAlias(kBW != fFQ);
        paint.setLCDRenderText(kLCD == fFQ);

        const SkScalar x0 = SkIntToScalar(-10);
        const SkScalar y0 = SkIntToScalar(-10);

        if (fDoPos) {
            // realistically, the matrix is often at least translated, so we
            // do that since it exercises different code in drawPosText.
            canvas->translate(SK_Scalar1, SK_Scalar1);
        }

        for (int i = 0; i < N; i++) {
            if (fDoPos) {
                canvas->drawPosText(fText.c_str(), fText.size(), fPos, paint);
            } else {
                SkScalar x = x0 + rand.nextUScalar1() * dim.fX;
                SkScalar y = y0 + rand.nextUScalar1() * dim.fY;
                canvas->drawText(fText.c_str(), fText.size(), x, y, paint);
            }
        }
    }