C++ SkIRect::width方法代码示例

SkISize SkAndroidCodec::getSampledSubsetDimensions(int sampleSize, const SkIRect& subset) const {
    if (!is_valid_sample_size(sampleSize)) {
        return SkISize::Make(0, 0);
    }

    // We require that the input subset is a subset that is supported by SkAndroidCodec.
    // We test this by calling getSupportedSubset() and verifying that no modifications
    // are made to the subset.
    SkIRect copySubset = subset;
    if (!this->getSupportedSubset(&copySubset) || copySubset != subset) {
        return SkISize::Make(0, 0);
    }

    // If the subset is the entire image, for consistency, use getSampledDimensions().
    if (fInfo.dimensions() == subset.size()) {
        return this->getSampledDimensions(sampleSize);
    }

    // This should perhaps call a virtual function, but currently both of our subclasses
    // want the same implementation.
    return SkISize::Make(get_scaled_dimension(subset.width(), sampleSize),
                get_scaled_dimension(subset.height(), sampleSize));
}

    bool onFilterImageDeprecated(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                 SkBitmap* dst, SkIPoint* offset) const override {
        SkBitmap source = src;
        SkIPoint srcOffset = SkIPoint::Make(0, 0);
        if (!this->filterInputDeprecated(0, proxy, src, ctx, &source, &srcOffset)) {
            return false;
        }

        SkIRect bounds;
        if (!this->applyCropRectDeprecated(ctx, proxy, source, &srcOffset, &bounds, &source)) {
            return false;
        }

        SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
        SkCanvas canvas(device);
        SkPaint paint;
        paint.setXfermodeMode(SkXfermode::kSrc_Mode);
        canvas.drawBitmap(source, fDX - bounds.left(), fDY - bounds.top(), &paint);
        *dst = device->accessBitmap(false);
        offset->fX += bounds.left();
        offset->fY += bounds.top();
        return true;
    }

static void draw_sprite(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
    SkPaint paint;

    SkIRect bounds;
    r.roundOut(&bounds);

    SkBitmap bm;
    bm.setConfig(SkBitmap::kARGB_8888_Config, bounds.width(), bounds.height());
    bm.allocPixels();
    bm.eraseColor(SK_ColorRED);
    SkCanvas c(bm);

    SkIRect cropRect = SkIRect::MakeXYWH(10, 10, 44, 44);
    paint.setColor(SK_ColorGREEN);
    c.drawRect(SkRect::Make(cropRect), paint);

    paint.setImageFilter(imf);
    SkPoint loc = { r.fLeft, r.fTop };
    canvas->getTotalMatrix().mapPoints(&loc, 1);
    canvas->drawSprite(bm,
                       SkScalarRoundToInt(loc.fX), SkScalarRoundToInt(loc.fY),
                       &paint);
}

static void SkARGB32_Blit32(const SkBitmap& device, const SkMask& mask,
							const SkIRect& clip, SkPMColor srcColor) {
	U8CPU alpha = SkGetPackedA32(srcColor);
	unsigned flags = SkBlitRow::kSrcPixelAlpha_Flag32;
	if (alpha != 255) {
		flags |= SkBlitRow::kGlobalAlpha_Flag32;
	}
	SkBlitRow::Proc32 proc = SkBlitRow::Factory32(flags);

    int x = clip.fLeft;
    int y = clip.fTop;
    int width = clip.width();
    int height = clip.height();

    SkPMColor*		 dstRow = device.getAddr32(x, y);
    const SkPMColor* srcRow = reinterpret_cast<const SkPMColor*>(mask.getAddr8(x, y));

    do {
		proc(dstRow, srcRow, width, alpha);
        dstRow = (SkPMColor*)((char*)dstRow + device.rowBytes());
        srcRow = (const SkPMColor*)((const char*)srcRow + mask.fRowBytes);
    } while (--height != 0);
}

bool SkPictureImageFilter::onFilterImageDeprecated(Proxy* proxy, const SkBitmap&,
                                                   const Context& ctx,
                                                   SkBitmap* result, SkIPoint* offset) const {
    if (!fPicture) {
        offset->fX = offset->fY = 0;
        return true;
    }

    SkRect floatBounds;
    ctx.ctm().mapRect(&floatBounds, fCropRect);
    SkIRect bounds = floatBounds.roundOut();
    if (!bounds.intersect(ctx.clipBounds())) {
        return false;
    }

    if (bounds.isEmpty()) {
        offset->fX = offset->fY = 0;
        return true;
    }

    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
    if (nullptr == device.get()) {
        return false;
    }

    if (kDeviceSpace_PictureResolution == fPictureResolution ||
        0 == (ctx.ctm().getType() & ~SkMatrix::kTranslate_Mask)) {
        this->drawPictureAtDeviceResolution(device.get(), bounds, ctx);
    } else {
        this->drawPictureAtLocalResolution(proxy, device.get(), bounds, ctx);
    }

    *result = device.get()->accessBitmap(false);
    offset->fX = bounds.fLeft;
    offset->fY = bounds.fTop;
    return true;
}

void SkImageFilter::CropRect::applyTo(const SkIRect& imageBounds,
                                      const SkMatrix& ctm,
                                      bool embiggen,
                                      SkIRect* cropped) const {
    *cropped = imageBounds;
    if (fFlags) {
        SkRect devCropR;
        ctm.mapRect(&devCropR, fRect);
        SkIRect devICropR = devCropR.roundOut();

        // Compute the left/top first, in case we need to modify the right/bottom for a missing edge
        if (fFlags & kHasLeft_CropEdge) {
            if (embiggen || devICropR.fLeft > cropped->fLeft) {
                cropped->fLeft = devICropR.fLeft;
            }
        } else {
            devICropR.fRight = cropped->fLeft + devICropR.width();
        }
        if (fFlags & kHasTop_CropEdge) {
            if (embiggen || devICropR.fTop > cropped->fTop) {
                cropped->fTop = devICropR.fTop;
            }
        } else {
            devICropR.fBottom = cropped->fTop + devICropR.height();
        }
        if (fFlags & kHasWidth_CropEdge) {
            if (embiggen || devICropR.fRight < cropped->fRight) {
                cropped->fRight = devICropR.fRight;
            }
        }
        if (fFlags & kHasHeight_CropEdge) {
            if (embiggen || devICropR.fBottom < cropped->fBottom) {
                cropped->fBottom = devICropR.fBottom;
            }
        }
    }
}

void SkARGB32_Black_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) {
    SkASSERT(mask.fBounds.contains(clip));

    if (mask.fFormat == SkMask::kBW_Format) {
        SkPMColor black = (SkPMColor)(SK_A32_MASK << SK_A32_SHIFT);

        SkARGB32_BlitBW(fDevice, mask, clip, black);
    } else if (SkMask::kARGB32_Format == mask.fFormat) {
		SkARGB32_Blit32(fDevice, mask, clip, fPMColor);
    } else if (SkMask::kLCD16_Format == mask.fFormat) {
        blitmask_lcd16(fDevice, mask, clip, fPMColor);
    } else if (SkMask::kLCD32_Format == mask.fFormat) {
        blitmask_lcd32(fDevice, mask, clip, fPMColor);
    } else {
        unsigned width = clip.width();
        unsigned height = clip.height();

        SkASSERT((int)height > 0);
        SkASSERT((int)width > 0);

        uint32_t*      device = fDevice.getAddr32(clip.fLeft, clip.fTop);
        unsigned       maskRB = mask.fRowBytes - width;
        unsigned       deviceRB = fDevice.rowBytes() - (width << 2);
        const uint8_t* alpha = mask.getAddr(clip.fLeft, clip.fTop);
        do {
            unsigned w = width;
            do {
                unsigned aa = *alpha++;
                *device = (aa << SK_A32_SHIFT) + SkAlphaMulQ(*device, SkAlpha255To256(255 - aa));
                device += 1;
            } while (--w != 0);
            device = (uint32_t*)((char*)device + deviceRB);
            alpha += maskRB;
        } while (--height != 0);
    }
}

bool GrIsImageInCache(const GrContext* ctx, uint32_t imageID, const SkIRect& subset,
                      GrTexture* nativeTexture, const GrTextureParams* params) {
    SkGrStretch stretch;
    get_stretch(ctx, subset.width(), subset.height(), params, &stretch);

    // Handle the case where the bitmap/image is explicitly texture backed.
    if (nativeTexture) {
        if (SkGrStretch::kNone_Type == stretch.fType) {
            return true;
        }
        const GrUniqueKey& key = nativeTexture->getUniqueKey();
        if (!key.isValid()) {
            return false;
        }
        GrUniqueKey stretchedKey;
        GrMakeStretchedKey(key, stretch, &stretchedKey);
        return ctx->textureProvider()->existsTextureWithUniqueKey(stretchedKey);
    }

    GrUniqueKey key, stretchedKey;
    make_image_keys(imageID, subset, stretch, &key, &stretchedKey);
    return ctx->textureProvider()->existsTextureWithUniqueKey(
        (SkGrStretch::kNone_Type == stretch.fType) ? key : stretchedKey);
}

bool SkImageSource::onFilterImageDeprecated(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                            SkBitmap* result, SkIPoint* offset) const {
    SkRect dstRect;
    ctx.ctm().mapRect(&dstRect, fDstRect);
    SkRect bounds = SkRect::MakeIWH(fImage->width(), fImage->height());
    if (fSrcRect == bounds && dstRect == bounds) {
        // No regions cropped out or resized; return entire image.
        offset->fX = offset->fY = 0;
        return fImage->asLegacyBitmap(result, SkImage::kRO_LegacyBitmapMode);
    }

    const SkIRect dstIRect = dstRect.roundOut();
    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(dstIRect.width(), dstIRect.height()));
    if (nullptr == device.get()) {
        return false;
    }

    SkCanvas canvas(device.get());
    SkPaint paint;

    // Subtract off the integer component of the translation (will be applied in loc, below).
    dstRect.offset(-SkIntToScalar(dstIRect.fLeft), -SkIntToScalar(dstIRect.fTop));
    paint.setXfermodeMode(SkXfermode::kSrc_Mode);
    // FIXME: this probably shouldn't be necessary, but drawImageRect asserts
    // None filtering when it's translate-only
    paint.setFilterQuality(
        fSrcRect.width() == dstRect.width() && fSrcRect.height() == dstRect.height() ?
               kNone_SkFilterQuality : fFilterQuality);
    canvas.drawImageRect(fImage, fSrcRect, dstRect, &paint, SkCanvas::kStrict_SrcRectConstraint);

    *result = device.get()->accessBitmap(false);
    offset->fX = dstIRect.fLeft;
    offset->fY = dstIRect.fTop;

    return true;
}

// Exercise the public API of SkSpecialSurface (e.g., getCanvas, newImageSnapshot)
static void test_surface(const sk_sp<SkSpecialSurface>& surf,
                         skiatest::Reporter* reporter,
                         int offset) {

    const SkIRect surfSubset = TestingSpecialSurfaceAccess::Subset(surf.get());
    REPORTER_ASSERT(reporter, offset == surfSubset.fLeft);
    REPORTER_ASSERT(reporter, offset == surfSubset.fTop);
    REPORTER_ASSERT(reporter, kSmallerSize == surfSubset.width());
    REPORTER_ASSERT(reporter, kSmallerSize == surfSubset.height());

    SkCanvas* canvas = surf->getCanvas();
    SkASSERT_RELEASE(canvas);

    canvas->clear(SK_ColorRED);

    sk_sp<SkSpecialImage> img(surf->makeImageSnapshot());
    REPORTER_ASSERT(reporter, img);

    const SkIRect imgSubset = img->subset();
    REPORTER_ASSERT(reporter, surfSubset == imgSubset);

    // the canvas was invalidated by the newImageSnapshot call
    REPORTER_ASSERT(reporter, !surf->getCanvas());
}

PassOwnPtr<Vector<char>> PictureSnapshot::replay(unsigned fromStep, unsigned toStep, double scale) const
{
    const SkIRect bounds = m_picture->cullRect().roundOut();

    // TODO(fmalita): convert this to SkSurface/SkImage, drop the intermediate SkBitmap.
    SkBitmap bitmap;
    bitmap.allocPixels(SkImageInfo::MakeN32Premul(bounds.width(), bounds.height()));
    bitmap.eraseARGB(0, 0, 0, 0);
    {
        ReplayingCanvas canvas(bitmap, fromStep, toStep);
        // Disable LCD text preemptively, because the picture opacity is unknown.
        // The canonical API involves SkSurface props, but since we're not SkSurface-based
        // at this point (see TODO above) we (ab)use saveLayer for this purpose.
        SkAutoCanvasRestore autoRestore(&canvas, false);
        canvas.saveLayer(nullptr, nullptr);

        canvas.scale(scale, scale);
        canvas.resetStepCount();
        m_picture->playback(&canvas, &canvas);
    }
    OwnPtr<Vector<char>> base64Data = adoptPtr(new Vector<char>());
    Vector<char> encodedImage;

    RefPtr<SkImage> image = adoptRef(SkImage::NewFromBitmap(bitmap));
    if (!image)
        return nullptr;

    ImagePixelLocker pixelLocker(image, kUnpremul_SkAlphaType, kRGBA_8888_SkColorType);
    ImageDataBuffer imageData(IntSize(image->width(), image->height()),
        static_cast<const unsigned char*>(pixelLocker.pixels()));
    if (!PNGImageEncoder::encode(imageData, reinterpret_cast<Vector<unsigned char>*>(&encodedImage)))
        return nullptr;

    base64Encode(encodedImage, *base64Data);
    return base64Data.release();
}

static void drawStretchyPatch(SkCanvas* canvas, SkIRect& src, const SkRect& dst,
                              const SkBitmap& bitmap, const SkPaint& paint,
                              SkColor initColor, uint32_t colorHint,
                              bool hasXfer) {
    if (colorHint !=  android::Res_png_9patch::NO_COLOR) {
        ((SkPaint*)&paint)->setColor(modAlpha(colorHint, paint.getAlpha()));
        canvas->drawRect(dst, paint);
        ((SkPaint*)&paint)->setColor(initColor);
    } else if (src.width() == 1 && src.height() == 1) {
        SkColor c;
        if (!getColor(bitmap, src.fLeft, src.fTop, &c)) {
            goto SLOW_CASE;
        }
        if (0 != c || hasXfer) {
            SkColor prev = paint.getColor();
            ((SkPaint*)&paint)->setColor(c);
            canvas->drawRect(dst, paint);
            ((SkPaint*)&paint)->setColor(prev);
        }
    } else {
    SLOW_CASE:
        canvas->drawBitmapRect(bitmap, &src, dst, &paint);
    }
}

SkImage* SkImage_Base::onApplyFilter(SkImageFilter* filter, SkIPoint* offsetResult,
                                     bool forceResultToOriginalSize) const {
    SkBitmap src;
    if (!this->getROPixels(&src)) {
        return nullptr;
    }

    const SkIRect srcBounds = SkIRect::MakeWH(this->width(), this->height());

    if (forceResultToOriginalSize) {
        const SkIRect clipBounds = srcBounds;
        SkRasterImageFilterProxy proxy;
        SkImageFilter::Context ctx(SkMatrix::I(), clipBounds, SkImageFilter::Cache::Get(),
                                   SkImageFilter::kExact_SizeConstraint);

        SkBitmap dst;
        if (filter->filterImage(&proxy, src, ctx, &dst, offsetResult)) {
            dst.setImmutable();
            return SkImage::NewFromBitmap(dst);
        }
    } else {
        const SkIRect dstR = compute_fast_ibounds(filter, srcBounds);

        SkImageInfo info = SkImageInfo::MakeN32Premul(dstR.width(), dstR.height());
        SkAutoTUnref<SkSurface> surface(this->onNewSurface(info));

        SkPaint paint;
        paint.setImageFilter(filter);
        surface->getCanvas()->drawImage(this, SkIntToScalar(-dstR.x()), SkIntToScalar(-dstR.y()),
                                        &paint);

        offsetResult->set(dstR.x(), dstR.y());
        return surface->newImageSnapshot();
    }
    return nullptr;
}

bool SkImageFilter::CropRect::applyTo(const SkIRect& imageBounds, const Context& ctx,
                                      SkIRect* cropped) const {
    *cropped = imageBounds;
    if (fFlags) {
        SkRect devCropR;
        ctx.ctm().mapRect(&devCropR, fRect);
        const SkIRect devICropR = devCropR.roundOut();

        // Compute the left/top first, in case we have to read them to compute right/bottom
        if (fFlags & kHasLeft_CropEdge) {
            cropped->fLeft = devICropR.fLeft;
        }
        if (fFlags & kHasTop_CropEdge) {
            cropped->fTop = devICropR.fTop;
        }
        if (fFlags & kHasWidth_CropEdge) {
            cropped->fRight = cropped->fLeft + devICropR.width();
        }
        if (fFlags & kHasHeight_CropEdge) {
            cropped->fBottom = cropped->fTop + devICropR.height();
        }
    }
    return cropped->intersect(ctx.clipBounds());
}

SkNinePatchIter::SkNinePatchIter(int w, int h, const SkIRect& c, const SkRect& dst) {
    SkASSERT(SkIRect::MakeWH(w, h).contains(c));

    fSrcX[0] = 0;
    fSrcX[1] = SkIntToScalar(c.fLeft);
    fSrcX[2] = SkIntToScalar(c.fRight);
    fSrcX[3] = SkIntToScalar(w);
    
    fSrcY[0] = 0;
    fSrcY[1] = SkIntToScalar(c.fTop);
    fSrcY[2] = SkIntToScalar(c.fBottom);
    fSrcY[3] = SkIntToScalar(h);
    
    fDstX[0] = dst.fLeft;
    fDstX[1] = dst.fLeft + SkIntToScalar(c.fLeft);
    fDstX[2] = dst.fRight - SkIntToScalar(w - c.fRight);
    fDstX[3] = dst.fRight;
    
    fDstY[0] = dst.fTop;
    fDstY[1] = dst.fTop + SkIntToScalar(c.fTop);
    fDstY[2] = dst.fBottom - SkIntToScalar(h - c.fBottom);
    fDstY[3] = dst.fBottom;
    
    if (fDstX[1] > fDstX[2]) {
        fDstX[1] = fDstX[0] + (fDstX[3] - fDstX[0]) * c.fLeft / (w - c.width());
        fDstX[2] = fDstX[1];
    }

    if (fDstY[1] > fDstY[2]) {
        fDstY[1] = fDstY[0] + (fDstY[3] - fDstY[0]) * c.fTop / (h - c.height());
        fDstY[2] = fDstY[1];
    }

    fCurrX = fCurrY = 0;
    fDone = false;
}