C++ SkBitmap::getBounds方法代码示例

bool SkColorFilterImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& source,
                                             const SkMatrix& matrix,
                                             SkBitmap* result,
                                             SkIPoint* loc) {
    SkBitmap src = source;
    if (getInput(0) && !getInput(0)->filterImage(proxy, source, matrix, &src, loc)) {
        return false;
    }

    SkIRect bounds;
    src.getBounds(&bounds);
    if (!this->applyCropRect(&bounds, matrix)) {
        return false;
    }

    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
    if (NULL == device.get()) {
        return false;
    }
    SkCanvas canvas(device.get());
    SkPaint paint;

    paint.setXfermodeMode(SkXfermode::kSrc_Mode);
    paint.setColorFilter(fColorFilter);
    canvas.drawSprite(src, -bounds.fLeft, -bounds.fTop, &paint);

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

bool SkBlurImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
                                       SkBitmap* result, SkIPoint* offset) {
#if SK_SUPPORT_GPU
    SkBitmap input;
    if (!SkImageFilterUtils::GetInputResultGPU(getInput(0), proxy, src, ctm, &input, offset)) {
        return false;
    }
    GrTexture* source = input.getTexture();
    SkIRect rect;
    src.getBounds(&rect);
    if (!this->applyCropRect(&rect, ctm)) {
        return false;
    }
    SkAutoTUnref<GrTexture> tex(SkGpuBlurUtils::GaussianBlur(source->getContext(),
                                                             source,
                                                             false,
                                                             SkRect::Make(rect),
                                                             true,
                                                             fSigma.width(),
                                                             fSigma.height()));
    offset->fX += rect.fLeft;
    offset->fY += rect.fTop;
    return SkImageFilterUtils::WrapTexture(tex, rect.width(), rect.height(), result);
#else
    SkDEBUGFAIL("Should not call in GPU-less build");
    return false;
#endif
}

bool SkBicubicImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
                                          SkBitmap* result, SkIPoint* offset) {
    SkBitmap srcBM;
    if (!SkImageFilterUtils::GetInputResultGPU(getInput(0), proxy, src, ctm, &srcBM, offset)) {
        return false;
    }
    GrTexture* srcTexture = srcBM.getTexture();
    GrContext* context = srcTexture->getContext();

    SkRect dstRect = SkRect::MakeWH(srcBM.width() * fScale.fWidth,
                                    srcBM.height() * fScale.fHeight);

    GrTextureDesc desc;
    desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
    desc.fWidth = SkScalarCeilToInt(dstRect.width());
    desc.fHeight = SkScalarCeilToInt(dstRect.height());
    desc.fConfig = kSkia8888_GrPixelConfig;

    GrAutoScratchTexture ast(context, desc);
    SkAutoTUnref<GrTexture> dst(ast.detach());
    if (!dst) {
        return false;
    }
    GrContext::AutoRenderTarget art(context, dst->asRenderTarget());
    GrPaint paint;
    paint.addColorEffect(GrBicubicEffect::Create(srcTexture, fCoefficients))->unref();
    SkRect srcRect;
    srcBM.getBounds(&srcRect);
    context->drawRectToRect(paint, dstRect, srcRect);
    return SkImageFilterUtils::WrapTexture(dst, desc.fWidth, desc.fHeight, result);
}

/**
 *  For the purposes of drawing bitmaps, if a matrix is "almost" translate
 *  go ahead and treat it as if it were, so that subsequent code can go fast.
 */
static bool just_trans_clamp(const SkMatrix& matrix, const SkBitmap& bitmap) {
    SkASSERT(matrix_only_scale_translate(matrix));

    if (matrix.getType() & SkMatrix::kScale_Mask) {
        SkRect src, dst;
        bitmap.getBounds(&src);

        // Can't call mapRect(), since that will fix up inverted rectangles,
        // e.g. when scale is negative, and we don't want to return true for
        // those.
        matrix.mapPoints(SkTCast<SkPoint*>(&dst),
                         SkTCast<const SkPoint*>(&src),
                         2);

        // Now round all 4 edges to device space, and then compare the device
        // width/height to the original. Note: we must map all 4 and subtract
        // rather than map the "width" and compare, since we care about the
        // phase (in pixel space) that any translate in the matrix might impart.
        SkIRect idst;
        dst.round(&idst);
        return idst.width() == bitmap.width() && idst.height() == bitmap.height();
    }
    // if we got here, we're either kTranslate_Mask or identity
    return true;
}

bool SkImageFilter::applyCropRect(const Context& ctx, Proxy* proxy, const SkBitmap& src,
                                  SkIPoint* srcOffset, SkIRect* bounds, SkBitmap* dst) const {
    SkIRect srcBounds;
    src.getBounds(&srcBounds);
    srcBounds.offset(*srcOffset);
    SkIRect dstBounds;
    this->onFilterNodeBounds(srcBounds, ctx.ctm(), &dstBounds, kForward_MapDirection);
    fCropRect.applyTo(dstBounds, ctx.ctm(), bounds);
    if (!bounds->intersect(ctx.clipBounds())) {
        return false;
    }

    if (srcBounds.contains(*bounds)) {
        *dst = src;
        return true;
    } else {
        SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds->width(), bounds->height()));
        if (!device) {
            return false;
        }
        SkCanvas canvas(device);
        canvas.clear(0x00000000);
        canvas.drawBitmap(src, srcOffset->x() - bounds->x(), srcOffset->y() - bounds->y());
        *srcOffset = SkIPoint::Make(bounds->x(), bounds->y());
        *dst = device->accessBitmap(false);
        return true;
    }
}

bool SkXfermodeImageFilter::filterImageGPU(Proxy* proxy,
                                           const SkBitmap& src,
                                           const Context& ctx,
                                           SkBitmap* result,
                                           SkIPoint* offset) const {
    SkBitmap background = src;
    SkIPoint backgroundOffset = SkIPoint::Make(0, 0);
    if (getInput(0) && !getInput(0)->getInputResultGPU(proxy, src, ctx, &background,
                                                       &backgroundOffset)) {
        return onFilterImage(proxy, src, ctx, result, offset);
    }
    GrTexture* backgroundTex = background.getTexture();
    SkBitmap foreground = src;
    SkIPoint foregroundOffset = SkIPoint::Make(0, 0);
    if (getInput(1) && !getInput(1)->getInputResultGPU(proxy, src, ctx, &foreground,
                                                       &foregroundOffset)) {
        return onFilterImage(proxy, src, ctx, result, offset);
    }
    GrTexture* foregroundTex = foreground.getTexture();
    GrContext* context = foregroundTex->getContext();

    GrFragmentProcessor* xferProcessor = NULL;

    GrSurfaceDesc desc;
    desc.fFlags = kRenderTarget_GrSurfaceFlag | kNoStencil_GrSurfaceFlag;
    desc.fWidth = src.width();
    desc.fHeight = src.height();
    desc.fConfig = kSkia8888_GrPixelConfig;
    SkAutoTUnref<GrTexture> dst(
        context->refScratchTexture(desc, GrContext::kApprox_ScratchTexMatch));
    if (!dst) {
        return false;
    }
    GrContext::AutoRenderTarget art(context, dst->asRenderTarget());

    if (!fMode || !fMode->asFragmentProcessor(&xferProcessor, backgroundTex)) {
        // canFilterImageGPU() should've taken care of this
        SkASSERT(false);
        return false;
    }

    SkMatrix foregroundMatrix = GrCoordTransform::MakeDivByTextureWHMatrix(foregroundTex);
    foregroundMatrix.preTranslate(SkIntToScalar(backgroundOffset.fX-foregroundOffset.fX),
                                  SkIntToScalar(backgroundOffset.fY-foregroundOffset.fY));


    SkRect srcRect;
    src.getBounds(&srcRect);

    GrPaint paint;
    paint.addColorTextureProcessor(foregroundTex, foregroundMatrix);
    paint.addColorProcessor(xferProcessor)->unref();
    context->drawRect(paint, srcRect);

    offset->fX = backgroundOffset.fX;
    offset->fY = backgroundOffset.fY;
    WrapTexture(dst, src.width(), src.height(), result);
    return true;
}

bool SkTileImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src,
                                      const Context& ctx,
                                      SkBitmap* dst, SkIPoint* offset) const {
    SkBitmap source = src;
    SkImageFilter* input = getInput(0);
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    if (input && !input->filterImage(proxy, src, ctx, &source, &srcOffset)) {
        return false;
    }

    SkRect dstRect;
    ctx.ctm().mapRect(&dstRect, fDstRect);
    const SkIRect dstIRect = dstRect.roundOut();
    int w = dstIRect.width();
    int h = dstIRect.height();
    if (!fSrcRect.width() || !fSrcRect.height() || !w || !h) {
        return false;
    }

    SkRect srcRect;
    ctx.ctm().mapRect(&srcRect, fSrcRect);
    SkIRect srcIRect;
    srcRect.roundOut(&srcIRect);
    srcIRect.offset(-srcOffset);
    SkBitmap subset;
    SkIRect bounds;
    source.getBounds(&bounds);

    if (!srcIRect.intersect(bounds)) {
        offset->fX = offset->fY = 0;
        return true;
    } else if (!source.extractSubset(&subset, srcIRect)) {
        return false;
    }

    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(w, h));
    if (NULL == device.get()) {
        return false;
    }
    SkCanvas canvas(device);
    SkPaint paint;
    paint.setXfermodeMode(SkXfermode::kSrc_Mode);

    SkMatrix shaderMatrix;
    shaderMatrix.setTranslate(SkIntToScalar(srcOffset.fX),
                              SkIntToScalar(srcOffset.fY));
    SkAutoTUnref<SkShader> shader(SkShader::CreateBitmapShader(subset,
                                  SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode,
                                  &shaderMatrix));
    paint.setShader(shader);
    canvas.translate(-dstRect.fLeft, -dstRect.fTop);
    canvas.drawRect(dstRect, paint);
    *dst = device->accessBitmap(false);
    offset->fX = dstIRect.fLeft;
    offset->fY = dstIRect.fTop;
    return true;
}

bool SkImageFilter::applyCropRect(const Context& ctx, const SkBitmap& src,
                                  const SkIPoint& srcOffset, SkIRect* dstBounds,
                                  SkIRect* srcBounds) const {
    SkIRect storage;
    if (!srcBounds) {
        srcBounds = &storage;
    }
    src.getBounds(srcBounds);
    srcBounds->offset(srcOffset);
    return fCropRect.applyTo(*srcBounds, ctx, dstBounds) && srcBounds->intersect(*dstBounds);
}

bool SkMiniRecorder::drawBitmapRect(const SkBitmap& bm, const SkRect* src, const SkRect& dst,
                                    const SkPaint* p, SkCanvas::SrcRectConstraint constraint) {
    SkRect bounds;
    if (!src) {
        bm.getBounds(&bounds);
        src = &bounds;
    }
    SkTLazy<SkPaint> defaultPaint;
    if (!p) {
        p = defaultPaint.init();
    }
    TRY_TO_STORE(DrawBitmapRectFixedSize, *p, bm, *src, dst, constraint);
}

bool SkXfermodeImageFilter::onFilterImage(Proxy* proxy,
                                            const SkBitmap& src,
                                            const SkMatrix& ctm,
                                            SkBitmap* dst,
                                            SkIPoint* offset) {
    SkBitmap background = src, foreground = src;
    SkImageFilter* backgroundInput = getInput(0);
    SkImageFilter* foregroundInput = getInput(1);
    SkIPoint backgroundOffset = SkIPoint::Make(0, 0);
    if (backgroundInput &&
        !backgroundInput->filterImage(proxy, src, ctm, &background, &backgroundOffset)) {
        return false;
    }
    SkIPoint foregroundOffset = SkIPoint::Make(0, 0);
    if (foregroundInput &&
        !foregroundInput->filterImage(proxy, src, ctm, &foreground, &foregroundOffset)) {
        return false;
    }

    SkIRect bounds, foregroundBounds;
    background.getBounds(&bounds);
    bounds.offset(backgroundOffset);
    foreground.getBounds(&foregroundBounds);
    foregroundBounds.offset(foregroundOffset);
    bounds.join(foregroundBounds);
    if (!applyCropRect(&bounds, ctm)) {
        return false;
    }

    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
    if (NULL == device.get()) {
        return false;
    }
    SkCanvas canvas(device);
    canvas.translate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
    SkPaint paint;
    paint.setXfermodeMode(SkXfermode::kSrc_Mode);
    canvas.drawBitmap(background, SkIntToScalar(backgroundOffset.fX),
                      SkIntToScalar(backgroundOffset.fY), &paint);
    paint.setXfermode(fMode);
    canvas.drawBitmap(foreground, SkIntToScalar(foregroundOffset.fX),
                      SkIntToScalar(foregroundOffset.fY), &paint);
    canvas.clipRect(SkRect::Make(foregroundBounds), SkRegion::kDifference_Op);
    paint.setColor(SK_ColorTRANSPARENT);
    canvas.drawPaint(paint);
    *dst = device->accessBitmap(false);
    offset->fX += bounds.left();
    offset->fY += bounds.top();
    return true;
}

bool SkImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
                                   SkBitmap* result, SkIPoint* offset) {
#if SK_SUPPORT_GPU
    SkBitmap input;
    SkASSERT(fInputCount == 1);
    if (!SkImageFilterUtils::GetInputResultGPU(this->getInput(0), proxy, src, ctm, &input, offset)) {
        return false;
    }
    GrTexture* srcTexture = input.getTexture();
    SkIRect bounds;
    src.getBounds(&bounds);
    if (!this->applyCropRect(&bounds, ctm)) {
        return false;
    }
    SkRect srcRect = SkRect::Make(bounds);
    SkRect dstRect = SkRect::MakeWH(srcRect.width(), srcRect.height());
    GrContext* context = srcTexture->getContext();

    GrTextureDesc desc;
    desc.fFlags = kRenderTarget_GrTextureFlagBit,
    desc.fWidth = bounds.width();
    desc.fHeight = bounds.height();
    desc.fConfig = kRGBA_8888_GrPixelConfig;

    GrAutoScratchTexture dst(context, desc);
    GrContext::AutoMatrix am;
    am.setIdentity(context);
    GrContext::AutoRenderTarget art(context, dst.texture()->asRenderTarget());
    GrContext::AutoClip acs(context, dstRect);
    GrEffectRef* effect;
    SkMatrix matrix(ctm);
    matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
    this->asNewEffect(&effect, srcTexture, matrix, bounds);
    SkASSERT(effect);
    SkAutoUnref effectRef(effect);
    GrPaint paint;
    paint.addColorEffect(effect);
    context->drawRectToRect(paint, dstRect, srcRect);

    SkAutoTUnref<GrTexture> resultTex(dst.detach());
    SkImageFilterUtils::WrapTexture(resultTex, bounds.width(), bounds.height(), result);
    offset->fX += bounds.left();
    offset->fY += bounds.top();
    return true;
#else
    return false;
#endif
}

bool SkImageFilter::applyCropRect(const Context& ctx, const SkBitmap& src,
                                  const SkIPoint& srcOffset, SkIRect* dstBounds,
                                  SkIRect* srcBounds) const {
    SkIRect storage;
    if (!srcBounds) {
        srcBounds = &storage;
    }
    src.getBounds(srcBounds);
    srcBounds->offset(srcOffset);
#ifdef SK_SUPPORT_SRC_BOUNDS_BLOAT_FOR_IMAGEFILTERS
    return fCropRect.applyTo(*srcBounds, ctx, dstBounds);
#else
    this->onFilterNodeBounds(*srcBounds, ctx.ctm(), dstBounds, kForward_MapDirection);
    return fCropRect.applyTo(*dstBounds, ctx, dstBounds);
#endif
}

bool SkMatrixImageFilter::onFilterImage(Proxy* proxy,
                                        const SkBitmap& source,
                                        const Context& ctx,
                                        SkBitmap* result,
                                        SkIPoint* offset) const {
    SkBitmap src = source;
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    if (getInput(0) && !getInput(0)->filterImage(proxy, source, ctx, &src, &srcOffset)) {
        return false;
    }

    SkRect dstRect;
    SkIRect srcBounds, dstBounds;
    src.getBounds(&srcBounds);
    srcBounds.offset(srcOffset);
    SkRect srcRect = SkRect::Make(srcBounds);
    SkMatrix matrix;
    if (!ctx.ctm().invert(&matrix)) {
        return false;
    }
    matrix.postConcat(fTransform);
    matrix.postConcat(ctx.ctm());
    matrix.mapRect(&dstRect, srcRect);
    dstRect.roundOut(&dstBounds);

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

    SkCanvas canvas(device.get());
    canvas.translate(-SkIntToScalar(dstBounds.x()), -SkIntToScalar(dstBounds.y()));
    canvas.concat(matrix);
    SkPaint paint;

    paint.setXfermodeMode(SkXfermode::kSrc_Mode);
    paint.setFilterLevel(fFilterLevel);
    canvas.drawBitmap(src, srcRect.x(), srcRect.y(), &paint);

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

bool SkImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, SkBitmap* result) {
#if SK_SUPPORT_GPU
    SkBitmap input;
    SkASSERT(fInputCount == 1);
    if (!SkImageFilterUtils::GetInputResultGPU(this->getInput(0), proxy, src, &input)) {
        return false;
    }
    GrTexture* srcTexture = (GrTexture*) input.getTexture();
    SkRect rect;
    src.getBounds(&rect);
    GrContext* context = srcTexture->getContext();

    GrTextureDesc desc;
    desc.fFlags = kRenderTarget_GrTextureFlagBit,
    desc.fWidth = input.width();
    desc.fHeight = input.height();
    desc.fConfig = kRGBA_8888_GrPixelConfig;

    GrAutoScratchTexture dst(context, desc);
    GrContext::AutoMatrix am;
    am.setIdentity(context);
    GrContext::AutoRenderTarget art(context, dst.texture()->asRenderTarget());
    GrContext::AutoClip acs(context, rect);
    GrEffectRef* effect;
    this->asNewEffect(&effect, srcTexture);
    SkASSERT(effect);
    SkAutoUnref effectRef(effect);
    GrPaint paint;
    paint.colorStage(0)->setEffect(effect);
    context->drawRect(paint, rect);
    SkAutoTUnref<GrTexture> resultTex(dst.detach());
    SkImageFilterUtils::WrapTexture(resultTex, input.width(), input.height(), result);
    return true;
#else
    return false;
#endif
}

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

    SkRect dstRect;
    ctx.ctm().mapRect(&dstRect, fDstRect);
    if (!dstRect.intersect(SkRect::Make(ctx.clipBounds()))) {
        offset->fX = offset->fY = 0;
        return true;
    }
    const SkIRect dstIRect = dstRect.roundOut();
    int w = dstIRect.width();
    int h = dstIRect.height();
    if (!fSrcRect.width() || !fSrcRect.height() || !w || !h) {
        return false;
    }

    SkRect srcRect;
    ctx.ctm().mapRect(&srcRect, fSrcRect);
    SkIRect srcIRect;
    srcRect.roundOut(&srcIRect);
    srcIRect.offset(-srcOffset);
    SkBitmap subset;
    SkIRect srcBounds;
    source.getBounds(&srcBounds);

    if (!SkIRect::Intersects(srcIRect, srcBounds)) {
        offset->fX = offset->fY = 0;
        return true;
    }
    if (srcBounds.contains(srcIRect)) {
        if (!source.extractSubset(&subset, srcIRect)) {
            return false;
        }
    } else {
        SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(srcIRect.width(),
                                                              srcIRect.height(),
                                                              kPossible_TileUsage));
        if (!device) {
            return false;
        }
        SkCanvas canvas(device);
        canvas.drawBitmap(src, SkIntToScalar(srcOffset.x()),
                               SkIntToScalar(srcOffset.y()));
        subset = device->accessBitmap(false);
    }
    SkASSERT(subset.width() == srcIRect.width());
    SkASSERT(subset.height() == srcIRect.height());

    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(w, h));
    if (nullptr == device.get()) {
        return false;
    }
    SkCanvas canvas(device);
    SkPaint paint;
    paint.setXfermodeMode(SkXfermode::kSrc_Mode);
    paint.setShader(SkShader::MakeBitmapShader(subset, SkShader::kRepeat_TileMode,
                                               SkShader::kRepeat_TileMode));
    canvas.translate(-dstRect.fLeft, -dstRect.fTop);
    canvas.drawRect(dstRect, paint);
    *dst = device->accessBitmap(false);
    offset->fX = dstIRect.fLeft;
    offset->fY = dstIRect.fTop;
    return true;
}