コード例 #1
0
ファイル: MatrixTest.cpp プロジェクト: Adenilson/skia
static void test_matrix_recttorect(skiatest::Reporter* reporter) {
    SkRect src, dst;
    SkMatrix matrix;

    src.set(0, 0, SK_Scalar1*10, SK_Scalar1*10);
    dst = src;
    matrix.setRectToRect(src, dst, SkMatrix::kFill_ScaleToFit);
    REPORTER_ASSERT(reporter, SkMatrix::kIdentity_Mask == matrix.getType());
    REPORTER_ASSERT(reporter, matrix.rectStaysRect());

    dst.offset(SK_Scalar1, SK_Scalar1);
    matrix.setRectToRect(src, dst, SkMatrix::kFill_ScaleToFit);
    REPORTER_ASSERT(reporter, SkMatrix::kTranslate_Mask == matrix.getType());
    REPORTER_ASSERT(reporter, matrix.rectStaysRect());

    dst.fRight += SK_Scalar1;
    matrix.setRectToRect(src, dst, SkMatrix::kFill_ScaleToFit);
    REPORTER_ASSERT(reporter,
                    (SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask) == matrix.getType());
    REPORTER_ASSERT(reporter, matrix.rectStaysRect());

    dst = src;
    dst.fRight = src.fRight * 2;
    matrix.setRectToRect(src, dst, SkMatrix::kFill_ScaleToFit);
    REPORTER_ASSERT(reporter, SkMatrix::kScale_Mask == matrix.getType());
    REPORTER_ASSERT(reporter, matrix.rectStaysRect());
}
コード例 #2
0
ファイル: ImageSkia.cpp プロジェクト: gobihun/webkit
// This does a lot of computation to resample only the portion of the bitmap
// that will only be drawn. This is critical for performance since when we are
// scrolling, for example, we are only drawing a small strip of the image.
// Resampling the whole image every time is very slow, so this speeds up things
// dramatically.
//
// Note: this code is only used when the canvas transformation is limited to
// scaling or translation.
static void drawResampledBitmap(SkCanvas& canvas, SkPaint& paint, const NativeImageSkia& bitmap, const SkRect& srcRect, const SkRect& destRect)
{
#if PLATFORM(CHROMIUM)
    TRACE_EVENT0("skia", "drawResampledBitmap");
#endif
    // We want to scale |destRect| with transformation in the canvas to obtain
    // the final scale. The final scale is a combination of scale transform
    // in canvas and explicit scaling (srcRect and destRect).
    SkRect screenRect;
    canvas.getTotalMatrix().mapRect(&screenRect, destRect);
    float realScaleX = screenRect.width() / srcRect.width();
    float realScaleY = screenRect.height() / srcRect.height();

    // This part of code limits scaling only to visible portion in the
    SkRect destRectVisibleSubset;
    ClipRectToCanvas(canvas, destRect, &destRectVisibleSubset);

    // ClipRectToCanvas often overshoots, resulting in a larger region than our
    // original destRect. Intersecting gets us back inside.
    if (!destRectVisibleSubset.intersect(destRect))
        return; // Nothing visible in destRect.

    // Find the corresponding rect in the source image.
    SkMatrix destToSrcTransform;
    SkRect srcRectVisibleSubset;
    destToSrcTransform.setRectToRect(destRect, srcRect, SkMatrix::kFill_ScaleToFit);
    destToSrcTransform.mapRect(&srcRectVisibleSubset, destRectVisibleSubset);

    SkRect scaledSrcRect;
    SkIRect enclosingScaledSrcRect;
    SkBitmap scaledImageFragment = extractScaledImageFragment(bitmap, srcRectVisibleSubset, realScaleX, realScaleY, &scaledSrcRect, &enclosingScaledSrcRect);

    // Expand the destination rectangle because the source rectangle was
    // expanded to fit to integer boundaries.
    SkMatrix scaledSrcToDestTransform;
    scaledSrcToDestTransform.setRectToRect(scaledSrcRect, destRectVisibleSubset, SkMatrix::kFill_ScaleToFit);
    SkRect enclosingDestRect;
    enclosingDestRect.set(enclosingScaledSrcRect);
    scaledSrcToDestTransform.mapRect(&enclosingDestRect);

    // The reason we do clipping is because Skia doesn't support SkRect as
    // source rect. See http://crbug.com/145540.
    // When Skia supports then use this as the source rect to replace 0.
    //
    // scaledSrcRect.offset(-enclosingScaledSrcRect.x(), -enclosingScaledSrcRect.y());
    canvas.save();
    canvas.clipRect(destRectVisibleSubset);

    // Because the image fragment is generated with an approxmiated scaling
    // factor. This draw will perform a close to 1 scaling.
    //
    // NOTE: For future optimization. If the difference in scale is so small
    // that Skia doesn't produce a difference then we can just blit it directly
    // to enhance performance.
    canvas.drawBitmapRect(scaledImageFragment, 0, enclosingDestRect, &paint);
    canvas.restore();
}
コード例 #3
0
void SkGpuDevice::drawTextureProducer(GrTextureProducer* producer,
                                      const SkRect* srcRect,
                                      const SkRect* dstRect,
                                      SkCanvas::SrcRectConstraint constraint,
                                      const SkMatrix& viewMatrix,
                                      const GrClip& clip,
                                      const SkPaint& paint) {
    // This is the funnel for all non-tiled bitmap/image draw calls. Log a histogram entry.
    SK_HISTOGRAM_BOOLEAN("DrawTiled", false);

    // Figure out the actual dst and src rect by clipping the src rect to the bounds of the
    // adjuster. If the src rect is clipped then the dst rect must be recomputed. Also determine
    // the matrix that maps the src rect to the dst rect.
    SkRect clippedSrcRect;
    SkRect clippedDstRect;
    const SkRect srcBounds = SkRect::MakeIWH(producer->width(), producer->height());
    SkMatrix srcToDstMatrix;
    if (srcRect) {
        if (!dstRect) {
            dstRect = &srcBounds;
        }
        if (!srcBounds.contains(*srcRect)) {
            clippedSrcRect = *srcRect;
            if (!clippedSrcRect.intersect(srcBounds)) {
                return;
            }
            if (!srcToDstMatrix.setRectToRect(*srcRect, *dstRect, SkMatrix::kFill_ScaleToFit)) {
                return;
            }
            srcToDstMatrix.mapRect(&clippedDstRect, clippedSrcRect);
        } else {
            clippedSrcRect = *srcRect;
            clippedDstRect = *dstRect;
            if (!srcToDstMatrix.setRectToRect(*srcRect, *dstRect, SkMatrix::kFill_ScaleToFit)) {
                return;
            }
        }
    } else {
        clippedSrcRect = srcBounds;
        if (dstRect) {
            clippedDstRect = *dstRect;
            if (!srcToDstMatrix.setRectToRect(srcBounds, *dstRect, SkMatrix::kFill_ScaleToFit)) {
                return;
            }
        } else {
            clippedDstRect = srcBounds;
            srcToDstMatrix.reset();
        }
    }

    // Now that we have both the view and srcToDst matrices, log our scale factor.
    LogDrawScaleFactor(SkMatrix::Concat(viewMatrix, srcToDstMatrix), paint.getFilterQuality());

    this->drawTextureProducerImpl(producer, clippedSrcRect, clippedDstRect, constraint, viewMatrix,
                                  srcToDstMatrix, clip, paint);
}
コード例 #4
0
// This does a lot of computation to resample only the portion of the bitmap
// that will only be drawn. This is critical for performance since when we are
// scrolling, for example, we are only drawing a small strip of the image.
// Resampling the whole image every time is very slow, so this speeds up things
// dramatically.
//
// Note: this code is only used when the canvas transformation is limited to
// scaling or translation.
void NativeImageSkia::drawResampledBitmap(GraphicsContext* context, SkPaint& paint, const SkRect& srcRect, const SkRect& destRect) const
{
    TRACE_EVENT0("skia", "drawResampledBitmap");
    // We want to scale |destRect| with transformation in the canvas to obtain
    // the final scale. The final scale is a combination of scale transform
    // in canvas and explicit scaling (srcRect and destRect).
    SkRect screenRect;
    context->getTotalMatrix().mapRect(&screenRect, destRect);
    float realScaleX = screenRect.width() / srcRect.width();
    float realScaleY = screenRect.height() / srcRect.height();

    // This part of code limits scaling only to visible portion in the
    SkRect destRectVisibleSubset;
    if (!context->canvas()->getClipBounds(&destRectVisibleSubset))
        return;

    // ClipRectToCanvas often overshoots, resulting in a larger region than our
    // original destRect. Intersecting gets us back inside.
    if (!destRectVisibleSubset.intersect(destRect))
        return; // Nothing visible in destRect.

    // Find the corresponding rect in the source image.
    SkMatrix destToSrcTransform;
    SkRect srcRectVisibleSubset;
    destToSrcTransform.setRectToRect(destRect, srcRect, SkMatrix::kFill_ScaleToFit);
    destToSrcTransform.mapRect(&srcRectVisibleSubset, destRectVisibleSubset);

    SkRect scaledSrcRect;
    SkBitmap scaledImageFragment = extractScaledImageFragment(srcRectVisibleSubset, realScaleX, realScaleY, &scaledSrcRect);

    context->drawBitmapRect(scaledImageFragment, &scaledSrcRect, destRectVisibleSubset, &paint);
}
コード例 #5
0
// This function is used to scale an image and extract a scaled fragment.
//
// ALGORITHM
//
// Because the scaled image size has to be integers, we approximate the real
// scale with the following formula (only X direction is shown):
//
// scaledImageWidth = round(scaleX * imageRect.width())
// approximateScaleX = scaledImageWidth / imageRect.width()
//
// With this method we maintain a constant scale factor among fragments in
// the scaled image. This allows fragments to stitch together to form the
// full scaled image. The downside is there will be a small difference
// between |scaleX| and |approximateScaleX|.
//
// A scaled image fragment is identified by:
//
// - Scaled image size
// - Scaled image fragment rectangle (IntRect)
//
// Scaled image size has been determined and the next step is to compute the
// rectangle for the scaled image fragment which needs to be an IntRect.
//
// scaledSrcRect = srcRect * (approximateScaleX, approximateScaleY)
// enclosingScaledSrcRect = enclosingIntRect(scaledSrcRect)
//
// Finally we extract the scaled image fragment using
// (scaledImageSize, enclosingScaledSrcRect).
//
SkBitmap NativeImageSkia::extractScaledImageFragment(const SkRect& srcRect, float scaleX, float scaleY, SkRect* scaledSrcRect) const
{
    SkISize imageSize = SkISize::Make(bitmap().width(), bitmap().height());
    SkISize scaledImageSize = SkISize::Make(clampToInteger(roundf(imageSize.width() * scaleX)),
        clampToInteger(roundf(imageSize.height() * scaleY)));

    SkRect imageRect = SkRect::MakeWH(imageSize.width(), imageSize.height());
    SkRect scaledImageRect = SkRect::MakeWH(scaledImageSize.width(), scaledImageSize.height());

    SkMatrix scaleTransform;
    scaleTransform.setRectToRect(imageRect, scaledImageRect, SkMatrix::kFill_ScaleToFit);
    scaleTransform.mapRect(scaledSrcRect, srcRect);

    bool ok = scaledSrcRect->intersect(scaledImageRect);
    ASSERT_UNUSED(ok, ok);
    SkIRect enclosingScaledSrcRect = enclosingIntRect(*scaledSrcRect);

    // |enclosingScaledSrcRect| can be larger than |scaledImageSize| because
    // of float inaccuracy so clip to get inside.
    ok = enclosingScaledSrcRect.intersect(SkIRect::MakeSize(scaledImageSize));
    ASSERT_UNUSED(ok, ok);

    // scaledSrcRect is relative to the pixel snapped fragment we're extracting.
    scaledSrcRect->offset(-enclosingScaledSrcRect.x(), -enclosingScaledSrcRect.y());

    return resizedBitmap(scaledImageSize, enclosingScaledSrcRect);
}
コード例 #6
0
ファイル: SampleCamera.cpp プロジェクト: UIKit0/skia
    CameraView() {
        fRX = fRY = fRZ = 0;
        fShaderIndex = 0;
        fFrontFace = false;

        for (int i = 0;; i++) {
            SkString str;
            str.printf("/skimages/elephant%d.jpeg", i);
            SkBitmap bm;
            if (SkImageDecoder::DecodeFile(str.c_str(), &bm)) {
                SkShader* s = SkShader::CreateBitmapShader(bm,
                                                           SkShader::kClamp_TileMode,
                                                           SkShader::kClamp_TileMode);

                SkRect src = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
                SkRect dst = { -150, -150, 150, 150 };
                SkMatrix matrix;
                matrix.setRectToRect(src, dst, SkMatrix::kFill_ScaleToFit);
                s->setLocalMatrix(matrix);
                *fShaders.append() = s;
            } else {
                break;
            }
        }
        this->setBGColor(0xFFDDDDDD);
    }
コード例 #7
0
ファイル: SkImagePriv.cpp プロジェクト: llluiop/skia
void SkImagePrivDrawPicture(SkCanvas* canvas, SkPicture* picture,
                            const SkRect* src,  const SkRect& dst, const SkPaint* paint) {
    int saveCount = canvas->getSaveCount();

    SkMatrix matrix;
    SkRect   tmpSrc;

    if (NULL != src) {
        tmpSrc = *src;
    } else {
        tmpSrc.set(0, 0,
                   SkIntToScalar(picture->width()),
                   SkIntToScalar(picture->height()));
    }

    matrix.setRectToRect(tmpSrc, dst, SkMatrix::kFill_ScaleToFit);
    if (paint && needs_layer(*paint)) {
        canvas->saveLayer(&dst, paint);
    } else {
        canvas->save();
    }
    canvas->concat(matrix);
    if (!paint || !needs_layer(*paint)) {
        canvas->clipRect(tmpSrc);
    }

    canvas->drawPicture(*picture);
    canvas->restoreToCount(saveCount);
}
コード例 #8
0
void
DrawTargetSkia::DrawSurface(SourceSurface *aSurface,
                            const Rect &aDest,
                            const Rect &aSource,
                            const DrawSurfaceOptions &aSurfOptions,
                            const DrawOptions &aOptions)
{
    if (aSurface->GetType() != SURFACE_SKIA) {
        return;
    }

    if (aSource.IsEmpty()) {
        return;
    }

    MarkChanged();

    SkRect destRect = RectToSkRect(aDest);
    SkRect sourceRect = RectToSkRect(aSource);

    SkMatrix matrix;
    matrix.setRectToRect(sourceRect, destRect, SkMatrix::kFill_ScaleToFit);

    const SkBitmap& bitmap = static_cast<SourceSurfaceSkia*>(aSurface)->GetBitmap();

    AutoPaintSetup paint(mCanvas.get(), aOptions);
    SkShader *shader = SkShader::CreateBitmapShader(bitmap, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
    shader->setLocalMatrix(matrix);
    SkSafeUnref(paint.mPaint.setShader(shader));
    if (aSurfOptions.mFilter != FILTER_LINEAR) {
        paint.mPaint.setFilterBitmap(false);
    }
    mCanvas->drawRect(destRect, paint.mPaint);
}
コード例 #9
0
ファイル: SampleHT.cpp プロジェクト: 03050903/skia
static bool oval_contains(const SkRect& r, SkScalar x, SkScalar y) {
    SkMatrix m;
    m.setRectToRect(r, gUnitSquare, SkMatrix::kFill_ScaleToFit);
    SkPoint pt;
    m.mapXY(x, y, &pt);
    return pt.lengthSqd() <= 1;
}
コード例 #10
0
static void test_huge_stroke(SkCanvas* canvas) {
    SkRect srcR = { 0, 0, 72000, 54000 };
    SkRect dstR = { 0, 0, 640, 480 };

    SkPath path;
    path.moveTo(17600, 8000);
    path.lineTo(52800, 8000);
    path.lineTo(52800, 41600);
    path.lineTo(17600, 41600);
    path.close();

    SkPaint paint;
    paint.setAntiAlias(true);
    paint.setStrokeWidth(8000);
    paint.setStrokeMiter(10);
    paint.setStrokeCap(SkPaint::kButt_Cap);
    paint.setStrokeJoin(SkPaint::kRound_Join);
    paint.setStyle(SkPaint::kStroke_Style);

    SkMatrix matrix;
    matrix.setRectToRect(srcR, dstR, SkMatrix::kCenter_ScaleToFit);
    canvas->concat(matrix);

    canvas->drawPath(path, paint);
}
コード例 #11
0
/**
  * Method which handles native redrawing screen
  */
void JNISDLVideoDriverListener::updateScreen(SkBitmap* bitmap)
{
    SkBitmap screen;
    Surface::SurfaceInfo surfaceInfo;

    if (!mSurface || !mSurface->isValid()) {
        __android_log_print(ANDROID_LOG_INFO, LOG_TAG, "nativeSurface wasn't valid");
        return;
    }

    if (mSurface->lock(&surfaceInfo) < 0) {
        __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, "Failed to lock surface");
        return;
    }
	
	//__android_log_print(ANDROID_LOG_ERROR, LOG_TAG, "updating screen: %ix%i", surfaceInfo.w, surfaceInfo.h);

    //bitmap which is drawed on android surfaceview
    SDLVideoDriver::setBitmapConfig(&screen, surfaceInfo.format, surfaceInfo.w, surfaceInfo.h);
    screen.setPixels(surfaceInfo.bits);

    SkCanvas canvas(screen);
    SkRect surface_sdl;
    SkRect surface_android;
    SkMatrix matrix;
    surface_android.set(0, 0, screen.width(), screen.height());
    surface_sdl.set(0, 0, bitmap->width(), bitmap->height());
    matrix.setRectToRect(surface_sdl, surface_android, SkMatrix::kFill_ScaleToFit);

    canvas.drawBitmapMatrix(*bitmap, matrix);

    if (mSurface->unlockAndPost() < 0) {
        __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, "Failed to unlock surface");
    }
}
コード例 #12
0
ファイル: SkCullPoints.cpp プロジェクト: jamorton/blix
bool SkHitTestPath(const SkPath& path, SkRect& target, bool hires) {
    if (target.isEmpty()) {
        return false;
    }

    bool isInverse = path.isInverseFillType();
    if (path.isEmpty()) {
        return isInverse;
    }

    SkRect bounds = path.getBounds();

    bool sects = SkRect::Intersects(target, bounds);
    if (isInverse) {
        if (!sects) {
            return true;
        }
    } else {
        if (!sects) {
            return false;
        }
        if (target.contains(bounds)) {
            return true;
        }
    }

    SkPath devPath;
    const SkPath* pathPtr;
    SkRect        devTarget;

    if (hires) {
        const SkScalar coordLimit = SkIntToScalar(16384);
        const SkRect limit = { 0, 0, coordLimit, coordLimit };
        
        SkMatrix matrix;
        matrix.setRectToRect(bounds, limit, SkMatrix::kFill_ScaleToFit);

        path.transform(matrix, &devPath);
        matrix.mapRect(&devTarget, target);

        pathPtr = &devPath;
    } else {
        devTarget = target;
        pathPtr = &path;
    }

    SkIRect iTarget;
    devTarget.round(&iTarget);
    if (iTarget.isEmpty()) {
        iTarget.fLeft = SkScalarFloorToInt(devTarget.fLeft);
        iTarget.fTop = SkScalarFloorToInt(devTarget.fTop);
        iTarget.fRight = iTarget.fLeft + 1;
        iTarget.fBottom = iTarget.fTop + 1;
    }

    SkRegion clip(iTarget);
    SkRegion rgn;
    return rgn.setPath(*pathPtr, clip) ^ isInverse;
}
コード例 #13
0
 static jboolean setRectToRect(JNIEnv* env, jobject clazz, jlong matrixHandle, jobject src, jobject dst, jint stfHandle) {
     SkMatrix* matrix = reinterpret_cast<SkMatrix*>(matrixHandle);
     SkMatrix::ScaleToFit stf = static_cast<SkMatrix::ScaleToFit>(stfHandle);
     SkRect src_;
     GraphicsJNI::jrectf_to_rect(env, src, &src_);
     SkRect dst_;
     GraphicsJNI::jrectf_to_rect(env, dst, &dst_);
     return matrix->setRectToRect(src_, dst_, stf) ? JNI_TRUE : JNI_FALSE;
 }
コード例 #14
0
ファイル: techtalk1.cpp プロジェクト: jetlive/skiaming
    virtual void onDraw(SkCanvas* canvas) {
        SkRect dst = SkRect::MakeWH(canvas->getDevice()->width(), canvas->getDevice()->height());
        SkRect src = SkRect::MakeWH(640, 480);
        SkMatrix matrix;
        matrix.setRectToRect(src, dst, SkMatrix::kCenter_ScaleToFit);

        canvas->concat(matrix);
        fProc(canvas, fShowGL, fFlags);
    }
コード例 #15
0
std::unique_ptr<GrDrawOp> MakeAAFillWithLocalRect(GrPaint&& paint, const SkMatrix& viewMatrix,
                                                  const SkRect& rect, const SkRect& localRect) {
    if (!view_matrix_ok_for_aa_fill_rect(viewMatrix)) {
        return nullptr;
    }
    SkRect devRect;
    viewMatrix.mapRect(&devRect, rect);
    SkMatrix localMatrix;
    if (!localMatrix.setRectToRect(rect, localRect, SkMatrix::kFill_ScaleToFit)) {
        return nullptr;
    }
    return AAFillRectOp::Make(std::move(paint), viewMatrix, rect, devRect, &localMatrix, nullptr);
}
コード例 #16
0
Boolean Matrix::NativeSetRectToRect(
    /* [in] */ Int64 nObj,
    /* [in] */ IRectF* src,
    /* [in] */ IRectF* dst,
    /* [in] */ Int32 stfHandle)
{
    SkMatrix* matrix = reinterpret_cast<SkMatrix*>(nObj);
    SkMatrix::ScaleToFit stf = static_cast<SkMatrix::ScaleToFit>(stfHandle);
    SkRect src_;
    GraphicsNative::IRectF2SkRect(src, &src_);
    SkRect dst_;
    GraphicsNative::IRectF2SkRect(dst, &dst_);
    return matrix->setRectToRect(src_, dst_, stf) ? TRUE : FALSE;
}
コード例 #17
0
void ASurface_scaleToFullScreen(ASurface* aSurface, AndroidSurfaceInfo* src, AndroidSurfaceInfo* dst) {
    SkBitmap    srcBitmap;
    SkBitmap    dstBitmap;
    SkMatrix    matrix;

    initBitmap(srcBitmap, src);
    initBitmap(dstBitmap, dst);
    matrix.setRectToRect(SkRect::MakeWH(srcBitmap.width(), srcBitmap.height()),
                         SkRect::MakeWH(dstBitmap.width(), dstBitmap.height()),
                         SkMatrix::kCenter_ScaleToFit);

    aSurface->canvas->setBitmapDevice(dstBitmap);
    aSurface->canvas->drawBitmapMatrix(srcBitmap, matrix);
    return;
}
コード例 #18
0
static void copybits(SkCanvas* canvas, const SkBitmap& bm, const SkRect& dst, const SkPaint& paint)
{
	SkRect		src;
	SkMatrix	matrix;

	src.set(0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()));
	if (matrix.setRectToRect(src, dst))
	{
		SkPaint	  p(paint);
		SkShader* shader = SkShader::CreateBitmapShader(bm, false, SkPaint::kNo_FilterType, SkShader::kClamp_TileMode);
		p.setShader(shader)->unref();

		shader->setLocalMatrix(matrix);
		canvas->drawRect(dst, p);
	}
}
コード例 #19
0
ファイル: ImageSkia.cpp プロジェクト: gobihun/webkit
// FIXME: Remove this code when SkCanvas accepts SkRect as source rectangle.
// See crbug.com/117597 for background.
//
// WebKit wants to draw a sub-rectangle (FloatRect) in a bitmap and scale it to
// another FloatRect. However Skia only allows bitmap to be addressed by a
// IntRect. This function computes the appropriate IntRect that encloses the
// source rectangle and the corresponding enclosing destination rectangle,
// while maintaining the scale factor.
//
// |srcRect| is the source rectangle in the bitmap. Return true if fancy
// alignment is required. User of this function needs to clip to |dstRect|.
// Return false if clipping is not needed.
//
// |dstRect| is the input rectangle that |srcRect| is scaled to.
//
// |outSrcRect| and |outDstRect| are the corresponding output rectangles.
//
// ALGORITHM
//
// The objective is to (a) find an enclosing IntRect for the source rectangle
// and (b) the corresponding FloatRect in destination space.
//
// These are the steps performed:
//
// 1. IntRect enclosingSrcRect = enclosingIntRect(srcRect)
//
//    Compute the enclosing IntRect for |srcRect|. This ensures the bitmap
//    image is addressed with integer boundaries.
//
// 2. FloatRect enclosingDestRect = mapSrcToDest(enclosingSrcRect)
//
//    Map the enclosing source rectangle to destination coordinate space.
//
// The output will be enclosingSrcRect and enclosingDestRect from the
// algorithm above.
static bool computeBitmapDrawRects(const SkISize& bitmapSize, const SkRect& srcRect, const SkRect& dstRect, SkIRect* outSrcRect, SkRect* outDstRect)
{
    if (areBoundariesIntegerAligned(srcRect)) {
        *outSrcRect = roundedIntRect(srcRect);
        *outDstRect = dstRect;
        return false;
    }

    SkIRect bitmapRect = SkIRect::MakeSize(bitmapSize);
    SkIRect enclosingSrcRect = enclosingIntRect(srcRect);
    enclosingSrcRect.intersect(bitmapRect); // Clip to bitmap rectangle.
    SkRect enclosingDstRect;
    enclosingDstRect.set(enclosingSrcRect);
    SkMatrix transform;
    transform.setRectToRect(srcRect, dstRect, SkMatrix::kFill_ScaleToFit);
    transform.mapRect(&enclosingDstRect);
    *outSrcRect = enclosingSrcRect;
    *outDstRect = enclosingDstRect;
    return true;
}
コード例 #20
0
ファイル: ImageSkia.cpp プロジェクト: gobihun/webkit
// This function is used to scale an image and extract a scaled fragment.
//
// ALGORITHM
//
// Because the scaled image size has to be integers, we approximate the real
// scale with the following formula (only X direction is shown):
//
// scaledImageWidth = round(scaleX * imageRect.width())
// approximateScaleX = scaledImageWidth / imageRect.width()
//
// With this method we maintain a constant scale factor among fragments in
// the scaled image. This allows fragments to stitch together to form the
// full scaled image. The downside is there will be a small difference
// between |scaleX| and |approximateScaleX|.
//
// A scaled image fragment is identified by:
//
// - Scaled image size
// - Scaled image fragment rectangle (IntRect)
//
// Scaled image size has been determined and the next step is to compute the
// rectangle for the scaled image fragment which needs to be an IntRect.
//
// scaledSrcRect = srcRect * (approximateScaleX, approximateScaleY)
// enclosingScaledSrcRect = enclosingIntRect(scaledSrcRect)
//
// Finally we extract the scaled image fragment using
// (scaledImageSize, enclosingScaledSrcRect).
//
static SkBitmap extractScaledImageFragment(const NativeImageSkia& bitmap, const SkRect& srcRect, float scaleX, float scaleY, SkRect* scaledSrcRect, SkIRect* enclosingScaledSrcRect)
{
    SkISize imageSize = SkISize::Make(bitmap.bitmap().width(), bitmap.bitmap().height());
    SkISize scaledImageSize = SkISize::Make(clampToInteger(roundf(imageSize.width() * scaleX)),
        clampToInteger(roundf(imageSize.height() * scaleY)));

    SkRect imageRect = SkRect::MakeWH(imageSize.width(), imageSize.height());
    SkRect scaledImageRect = SkRect::MakeWH(scaledImageSize.width(), scaledImageSize.height());

    SkMatrix scaleTransform;
    scaleTransform.setRectToRect(imageRect, scaledImageRect, SkMatrix::kFill_ScaleToFit);
    scaleTransform.mapRect(scaledSrcRect, srcRect);

    scaledSrcRect->intersect(scaledImageRect);
    *enclosingScaledSrcRect = enclosingIntRect(*scaledSrcRect);

    // |enclosingScaledSrcRect| can be larger than |scaledImageSize| because
    // of float inaccuracy so clip to get inside.
    enclosingScaledSrcRect->intersect(SkIRect::MakeSize(scaledImageSize));
    return bitmap.resizedBitmap(scaledImageSize, *enclosingScaledSrcRect);
}
コード例 #21
0
ファイル: SkSVGDevice.cpp プロジェクト: alphan102/gecko-dev
void SkSVGDevice::drawBitmapRect(const SkDraw& draw, const SkBitmap& bm, const SkRect* srcOrNull,
                                 const SkRect& dst, const SkPaint& paint,
                                 SkCanvas::SrcRectConstraint) {
    SkMatrix adjustedMatrix;
    adjustedMatrix.setRectToRect(srcOrNull ? *srcOrNull : SkRect::Make(bm.bounds()),
                                 dst,
                                 SkMatrix::kFill_ScaleToFit);
    adjustedMatrix.postConcat(*draw.fMatrix);

    SkDraw adjustedDraw(draw);
    adjustedDraw.fMatrix = &adjustedMatrix;

    SkClipStack adjustedClipStack;
    if (srcOrNull && *srcOrNull != SkRect::Make(bm.bounds())) {
        adjustedClipStack = *draw.fClipStack;
        adjustedClipStack.clipRect(dst, *draw.fMatrix, SkCanvas::kIntersect_Op,
                                   paint.isAntiAlias());
        adjustedDraw.fClipStack = &adjustedClipStack;
    }

    drawBitmapCommon(adjustedDraw, bm, paint);
}
コード例 #22
0
ファイル: SkSVGDevice.cpp プロジェクト: Jichao/skia
void SkSVGDevice::drawBitmapRect(const SkDraw& draw, const SkBitmap& bm, const SkRect* srcOrNull,
                                 const SkRect& dst, const SkPaint& paint,
                                 SK_VIRTUAL_CONSTRAINT_TYPE) {
    SkMatrix adjustedMatrix;
    adjustedMatrix.setRectToRect(srcOrNull ? *srcOrNull : SkRect::Make(bm.bounds()),
                                 dst,
                                 SkMatrix::kFill_ScaleToFit);
    adjustedMatrix.postConcat(*draw.fMatrix);

    SkDraw adjustedDraw(draw);
    adjustedDraw.fMatrix = &adjustedMatrix;

    SkClipStack adjustedClipStack;
    if (srcOrNull && *srcOrNull != SkRect::Make(bm.bounds())) {
        SkRect devClipRect;
        draw.fMatrix->mapRect(&devClipRect, dst);

        adjustedClipStack = *draw.fClipStack;
        adjustedClipStack.clipDevRect(devClipRect, SkRegion::kIntersect_Op, paint.isAntiAlias());
        adjustedDraw.fClipStack = &adjustedClipStack;
    }

    drawBitmapCommon(adjustedDraw, bm, paint);
}
コード例 #23
0
void ASurface_scaleToFullScreen_skia(ASurface* aSurface, AndroidSurfaceInfo* src,
							AndroidSurfaceInfo* dst,
							size_t size) {
    SkBitmap    dstBitmap;
    SkMatrix    matrix;
	void *pixel = NULL;
	int swidth = 0;
	int sheight = 0;
	int i, width, height, buf_size;

	width = 0;
	height = 0;

	struct jpeg_ext *ext = (struct jpeg_ext *)src->bits;
	char *real_jpeg = (char *)src->bits + sizeof(struct jpeg_ext);

	LOGD("```````````````````````````````````");
	LOGD("%s: %d\n", __func__, __LINE__);
	if(ext->fragment_num == 1)
	{
		if (ASurface_decode(&srcBitmap, real_jpeg, size, &swidth, &sheight)) {
		    LOGE("decode error\n");
		    return;
	    }
		LOGD("swidth = %d, sheight = %d\n", swidth, sheight);
	}
	else
	{
		SkBitmap sktemp[6];
		width = 0;
		height = 0;
		for(i = 0; i < ext->fragment_num; i++)
		{
			if (ASurface_decode(&sktemp[i], real_jpeg + ext->fragment[i].offset, ext->fragment[i].size, &swidth, &sheight)) {
				LOGE("decode error\n");
				return;
			}
			width = sktemp[i].width();
			height += sktemp[i].height();
		}
		srcBitmap.setConfig(SkBitmap::kRGB_565_Config, width, height);
		LOGD("%s: real height = %d width = %d\n", __func__, height, width);
		buf_size =  width * height * 2;
		pixel = malloc(buf_size);
		if(!pixel)
			return;
		width =  height = 0;
		for(i = 0; i < ext->fragment_num; i++)
		{
			void *frag_buf;
			width = sktemp[i].width();
			frag_buf = sktemp[i].getPixels();
			memcpy((char *)pixel + (height * width * 2), frag_buf, sktemp[i].getSize());
			height += sktemp[i].height();
		}
		srcBitmap.setPixels(pixel);
	}

	if(dst->w != dst->s)
	{
		void *buf_temp;
		int i, pixel_size;
		SkBitmap temp;
		if(dst->format == ANDROID_PIXEL_FORMAT_RGB_565)
			pixel_size = 2;
		else
			pixel_size = 4;
		buf_temp = malloc(dst->w * dst->h * pixel_size);
		if(!buf_temp)
			return;
		temp.setConfig(convertPixelFormat(dst->format), dst->w, dst->h);
		temp.setPixels(buf_temp);
		matrix.setRectToRect(SkRect::MakeWH(srcBitmap.width(), srcBitmap.height()),
			                 SkRect::MakeWH(temp.width(), temp.height()),
			                 SkMatrix::kFill_ScaleToFit);

		for(i = 0; i < (int)dst->h; i++)
			memcpy((char *)dst->bits + i * dst->s * pixel_size, (char *)buf_temp + i * dst->w * pixel_size, dst->w * pixel_size);
		dstBitmap.setConfig(convertPixelFormat(dst->format), dst->s, dst->h);
		dstBitmap.setPixels(dst->bits);
		aSurface->canvas->setBitmapDevice(dstBitmap);
		aSurface->canvas->drawBitmapMatrix(srcBitmap, matrix);
		free(buf_temp);
	}
	else
	{
#ifndef SKIA_DECODE
		srcBitmap.setConfig(convertPixelFormat(ANDROID_PIXEL_FORMAT_RGBA_8888), swidth, sheight);
		srcBitmap.setPixels(outBuf2);
#else
#endif

		initBitmap(dstBitmap, dst);
#if 0 /*original*/
		LOGD("Jerry catch Tom: SKIA : g_clear_screen_client = %d\n", g_clear_screen_client);
		matrix.setRectToRect(SkRect::MakeWH(srcBitmap.width(), srcBitmap.height()),
			                 SkRect::MakeWH(dstBitmap.width(), dstBitmap.height()),
			                 SkMatrix::kFill_ScaleToFit);
#else

	/* clear screen */
	//memset(srcBitmap.getPixels(), 0, width * height * 2);
	LOGD("Hi, Tom, I'm Jerry!\n");
	LOGD("dst->w = %d, dst->h = %d", dst->w, dst->h);
	memset(dst->bits, 0, dst->w * dst->h * 2);

if (g_clear_screen_client)
{
		matrix.setRectToRect(SkRect::MakeWH(srcBitmap.width(), srcBitmap.height()),
			                 SkRect::MakeWH(dstBitmap.width(), dstBitmap.height()),
			                 SkMatrix::kFill_ScaleToFit);
		aSurface->canvas->setBitmapDevice(dstBitmap);
		aSurface->canvas->drawBitmapMatrix(srcBitmap, matrix);
}
else
{
		matrix.setRectToRect(SkRect::MakeWH(srcBitmap.width(), srcBitmap.height()),
			                 SkRect::MakeWH(dstBitmap.width(), dstBitmap.height()),
			                 SkMatrix::kCenter_ScaleToFit);
		aSurface->canvas->setBitmapDevice(dstBitmap);
		aSurface->canvas->drawBitmapMatrix(srcBitmap, matrix);
}
#endif

	}
	if(ext->fragment_num > 1)
	{
		free(pixel);
		srcBitmap.setPixels(NULL);
	}
    return;
}
コード例 #24
0
static void draw_vector_logo(SkCanvas* canvas, const SkRect& viewBox) {
    constexpr char kSkiaStr[] = "SKIA";
    constexpr SkScalar kGradientPad = .1f;
    constexpr SkScalar kVerticalSpacing = 0.25f;
    constexpr SkScalar kAccentScale = 1.20f;

    SkPaint paint;
    paint.setAntiAlias(true);
    paint.setSubpixelText(true);
    paint.setFakeBoldText(true);
    sk_tool_utils::set_portable_typeface(&paint);

    SkPath path;
    SkRect iBox, skiBox, skiaBox;
    paint.getTextPath("SKI", 3, 0, 0, &path);
    TightBounds(path, &skiBox);
    paint.getTextPath("I", 1, 0, 0, &path);
    TightBounds(path, &iBox);
    iBox.offsetTo(skiBox.fRight - iBox.width(), iBox.fTop);

    const size_t textLen = strlen(kSkiaStr);
    paint.getTextPath(kSkiaStr, textLen, 0, 0, &path);
    TightBounds(path, &skiaBox);
    skiaBox.outset(0, 2 * iBox.width() * (kVerticalSpacing + 1));

    const SkScalar accentSize = iBox.width() * kAccentScale;
    const SkScalar underlineY = iBox.bottom() +
        (kVerticalSpacing + SkScalarSqrt(3) / 2) * accentSize;
    SkMatrix m;
    m.setRectToRect(skiaBox, viewBox, SkMatrix::kFill_ScaleToFit);
    SkAutoCanvasRestore acr(canvas, true);
    canvas->concat(m);

    canvas->drawCircle(iBox.centerX(),
                       iBox.y() - (0.5f + kVerticalSpacing) * accentSize,
                       accentSize / 2,
                       paint);

    path.reset();
    path.moveTo(iBox.centerX() - accentSize / 2, iBox.bottom() + kVerticalSpacing * accentSize);
    path.rLineTo(accentSize, 0);
    path.lineTo(iBox.centerX(), underlineY);
    canvas->drawPath(path, paint);

    SkRect underlineRect = SkRect::MakeLTRB(iBox.centerX() - iBox.width() * accentSize * 3,
                                            underlineY,
                                            iBox.centerX(),
                                            underlineY + accentSize / 10);
    const SkPoint pts1[] = { SkPoint::Make(underlineRect.x(), 0),
                             SkPoint::Make(iBox.centerX(), 0) };
    const SkScalar pos1[] = { 0, 0.75f };
    const SkColor colors1[] = { SK_ColorTRANSPARENT, SK_ColorBLACK };
    SkASSERT(SK_ARRAY_COUNT(pos1) == SK_ARRAY_COUNT(colors1));
    paint.setShader(SkGradientShader::MakeLinear(pts1, colors1, pos1, SK_ARRAY_COUNT(pos1),
                                                 SkShader::kClamp_TileMode));
    canvas->drawRect(underlineRect, paint);

    const SkPoint pts2[] = { SkPoint::Make(iBox.x() - iBox.width() * kGradientPad, 0),
                             SkPoint::Make(iBox.right() + iBox.width() * kGradientPad, 0) };
    const SkScalar pos2[] = { 0, .01f, 1.0f/3, 1.0f/3, 2.0f/3, 2.0f/3, .99f, 1 };
    const SkColor colors2[] = {
        SK_ColorBLACK,
        0xffca5139,
        0xffca5139,
        0xff8dbd53,
        0xff8dbd53,
        0xff5460a5,
        0xff5460a5,
        SK_ColorBLACK
    };
    SkASSERT(SK_ARRAY_COUNT(pos2) == SK_ARRAY_COUNT(colors2));
    paint.setShader(SkGradientShader::MakeLinear(pts2, colors2, pos2, SK_ARRAY_COUNT(pos2),
                                                 SkShader::kClamp_TileMode));
    canvas->drawText(kSkiaStr, textLen, 0, 0, paint);
}
コード例 #25
0
void SkBitmapDevice::drawBitmapRect(const SkDraw& draw, const SkBitmap& bitmap,
                                    const SkRect* src, const SkRect& dst,
                                    const SkPaint& paint, SkCanvas::SrcRectConstraint constraint) {
    SkMatrix    matrix;
    SkRect      bitmapBounds, tmpSrc, tmpDst;
    SkBitmap    tmpBitmap;

    bitmapBounds.isetWH(bitmap.width(), bitmap.height());

    // Compute matrix from the two rectangles
    if (src) {
        tmpSrc = *src;
    } else {
        tmpSrc = bitmapBounds;
    }
    matrix.setRectToRect(tmpSrc, dst, SkMatrix::kFill_ScaleToFit);

    LogDrawScaleFactor(SkMatrix::Concat(*draw.fMatrix, matrix), paint.getFilterQuality());

    const SkRect* dstPtr = &dst;
    const SkBitmap* bitmapPtr = &bitmap;

    // clip the tmpSrc to the bounds of the bitmap, and recompute dstRect if
    // needed (if the src was clipped). No check needed if src==null.
    if (src) {
        if (!bitmapBounds.contains(*src)) {
            if (!tmpSrc.intersect(bitmapBounds)) {
                return; // nothing to draw
            }
            // recompute dst, based on the smaller tmpSrc
            matrix.mapRect(&tmpDst, tmpSrc);
            dstPtr = &tmpDst;
        }
    }

    if (src && !src->contains(bitmapBounds) &&
        SkCanvas::kFast_SrcRectConstraint == constraint &&
        paint.getFilterQuality() != kNone_SkFilterQuality) {
        // src is smaller than the bounds of the bitmap, and we are filtering, so we don't know
        // how much more of the bitmap we need, so we can't use extractSubset or drawBitmap,
        // but we must use a shader w/ dst bounds (which can access all of the bitmap needed).
        goto USE_SHADER;
    }

    if (src) {
        // since we may need to clamp to the borders of the src rect within
        // the bitmap, we extract a subset.
        const SkIRect srcIR = tmpSrc.roundOut();
        if (!bitmap.extractSubset(&tmpBitmap, srcIR)) {
            return;
        }
        bitmapPtr = &tmpBitmap;

        // Since we did an extract, we need to adjust the matrix accordingly
        SkScalar dx = 0, dy = 0;
        if (srcIR.fLeft > 0) {
            dx = SkIntToScalar(srcIR.fLeft);
        }
        if (srcIR.fTop > 0) {
            dy = SkIntToScalar(srcIR.fTop);
        }
        if (dx || dy) {
            matrix.preTranslate(dx, dy);
        }

        SkRect extractedBitmapBounds;
        extractedBitmapBounds.isetWH(bitmapPtr->width(), bitmapPtr->height());
        if (extractedBitmapBounds == tmpSrc) {
            // no fractional part in src, we can just call drawBitmap
            goto USE_DRAWBITMAP;
        }
    } else {
        USE_DRAWBITMAP:
        // We can go faster by just calling drawBitmap, which will concat the
        // matrix with the CTM, and try to call drawSprite if it can. If not,
        // it will make a shader and call drawRect, as we do below.
        if (CanApplyDstMatrixAsCTM(matrix, paint)) {
            draw.drawBitmap(*bitmapPtr, matrix, dstPtr, paint);
            return;
        }
    }

    USE_SHADER:

    // Since the shader need only live for our stack-frame, pass in a custom allocator. This
    // can save malloc calls, and signals to SkMakeBitmapShader to not try to copy the bitmap
    // if its mutable, since that precaution is not needed (give the short lifetime of the shader).
    SkTBlitterAllocator allocator;
    // construct a shader, so we can call drawRect with the dst
    auto s = SkMakeBitmapShader(*bitmapPtr, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode,
                                &matrix, kNever_SkCopyPixelsMode, &allocator);
    if (!s) {
        return;
    }
    // we deliberately add a ref, since the allocator wants to be the last owner
    s.get()->ref();

    SkPaint paintWithShader(paint);
    paintWithShader.setStyle(SkPaint::kFill_Style);
    paintWithShader.setShader(s);

    // Call ourself, in case the subclass wanted to share this setup code
    // but handle the drawRect code themselves.
    this->drawRect(draw, *dstPtr, paintWithShader);
}
コード例 #26
0
bool SkBicubicImageFilter::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;
    }

    if (src.config() != SkBitmap::kARGB_8888_Config) {
        return false;
    }

    SkAutoLockPixels alp(src);
    if (!src.getPixels()) {
        return false;
    }

    SkRect dstRect = SkRect::MakeWH(SkScalarMul(SkIntToScalar(src.width()), fScale.fWidth),
                                    SkScalarMul(SkIntToScalar(src.height()), fScale.fHeight));
    SkIRect dstIRect;
    dstRect.roundOut(&dstIRect);
    result->setConfig(src.config(), dstIRect.width(), dstIRect.height());
    result->allocPixels();
    if (!result->getPixels()) {
        return false;
    }

    SkRect srcRect;
    src.getBounds(&srcRect);
    SkMatrix inverse;
    inverse.setRectToRect(dstRect, srcRect, SkMatrix::kFill_ScaleToFit);
    inverse.postTranslate(SkFloatToScalar(-0.5f), SkFloatToScalar(-0.5f));

    for (int y = dstIRect.fTop; y < dstIRect.fBottom; ++y) {
        SkPMColor* dptr = result->getAddr32(dstIRect.fLeft, y);
        for (int x = dstIRect.fLeft; x < dstIRect.fRight; ++x) {
            SkPoint srcPt, dstPt = SkPoint::Make(SkIntToScalar(x), SkIntToScalar(y));
            inverse.mapPoints(&srcPt, &dstPt, 1);
            SkScalar fractx = srcPt.fX - SkScalarFloorToScalar(srcPt.fX);
            SkScalar fracty = srcPt.fY - SkScalarFloorToScalar(srcPt.fY);
            int sx = SkScalarFloorToInt(srcPt.fX);
            int sy = SkScalarFloorToInt(srcPt.fY);
            int x0 = SkClampMax(sx - 1, src.width() - 1);
            int x1 = SkClampMax(sx    , src.width() - 1);
            int x2 = SkClampMax(sx + 1, src.width() - 1);
            int x3 = SkClampMax(sx + 2, src.width() - 1);
            int y0 = SkClampMax(sy - 1, src.height() - 1);
            int y1 = SkClampMax(sy    , src.height() - 1);
            int y2 = SkClampMax(sy + 1, src.height() - 1);
            int y3 = SkClampMax(sy + 2, src.height() - 1);
            SkPMColor s00 = *src.getAddr32(x0, y0);
            SkPMColor s10 = *src.getAddr32(x1, y0);
            SkPMColor s20 = *src.getAddr32(x2, y0);
            SkPMColor s30 = *src.getAddr32(x3, y0);
            SkPMColor s0 = cubicBlend(fCoefficients, fractx, s00, s10, s20, s30);
            SkPMColor s01 = *src.getAddr32(x0, y1);
            SkPMColor s11 = *src.getAddr32(x1, y1);
            SkPMColor s21 = *src.getAddr32(x2, y1);
            SkPMColor s31 = *src.getAddr32(x3, y1);
            SkPMColor s1 = cubicBlend(fCoefficients, fractx, s01, s11, s21, s31);
            SkPMColor s02 = *src.getAddr32(x0, y2);
            SkPMColor s12 = *src.getAddr32(x1, y2);
            SkPMColor s22 = *src.getAddr32(x2, y2);
            SkPMColor s32 = *src.getAddr32(x3, y2);
            SkPMColor s2 = cubicBlend(fCoefficients, fractx, s02, s12, s22, s32);
            SkPMColor s03 = *src.getAddr32(x0, y3);
            SkPMColor s13 = *src.getAddr32(x1, y3);
            SkPMColor s23 = *src.getAddr32(x2, y3);
            SkPMColor s33 = *src.getAddr32(x3, y3);
            SkPMColor s3 = cubicBlend(fCoefficients, fractx, s03, s13, s23, s33);
            *dptr++ = cubicBlend(fCoefficients, fracty, s0, s1, s2, s3);
        }
    }
    return true;
}
コード例 #27
0
void SkBitmapDevice::drawBitmapRect(const SkDraw& draw, const SkBitmap& bitmap,
                                    const SkRect* src, const SkRect& dst,
                                    const SkPaint& paint,
                                    SkCanvas::DrawBitmapRectFlags flags) {
    SkMatrix    matrix;
    SkRect      bitmapBounds, tmpSrc, tmpDst;
    SkBitmap    tmpBitmap;

    bitmapBounds.isetWH(bitmap.width(), bitmap.height());

    // Compute matrix from the two rectangles
    if (src) {
        tmpSrc = *src;
    } else {
        tmpSrc = bitmapBounds;
    }
    matrix.setRectToRect(tmpSrc, dst, SkMatrix::kFill_ScaleToFit);

    const SkRect* dstPtr = &dst;
    const SkBitmap* bitmapPtr = &bitmap;

    // clip the tmpSrc to the bounds of the bitmap, and recompute dstRect if
    // needed (if the src was clipped). No check needed if src==null.
    if (src) {
        if (!bitmapBounds.contains(*src)) {
            if (!tmpSrc.intersect(bitmapBounds)) {
                return; // nothing to draw
            }
            // recompute dst, based on the smaller tmpSrc
            matrix.mapRect(&tmpDst, tmpSrc);
            dstPtr = &tmpDst;
        }

        // since we may need to clamp to the borders of the src rect within
        // the bitmap, we extract a subset.
        SkIRect srcIR;
        tmpSrc.roundOut(&srcIR);
        if (!bitmap.extractSubset(&tmpBitmap, srcIR)) {
            return;
        }
        bitmapPtr = &tmpBitmap;

        // Since we did an extract, we need to adjust the matrix accordingly
        SkScalar dx = 0, dy = 0;
        if (srcIR.fLeft > 0) {
            dx = SkIntToScalar(srcIR.fLeft);
        }
        if (srcIR.fTop > 0) {
            dy = SkIntToScalar(srcIR.fTop);
        }
        if (dx || dy) {
            matrix.preTranslate(dx, dy);
        }

        SkRect extractedBitmapBounds;
        extractedBitmapBounds.isetWH(bitmapPtr->width(), bitmapPtr->height());
        if (extractedBitmapBounds == tmpSrc) {
            // no fractional part in src, we can just call drawBitmap
            goto USE_DRAWBITMAP;
        }
    } else {
        USE_DRAWBITMAP:
        // We can go faster by just calling drawBitmap, which will concat the
        // matrix with the CTM, and try to call drawSprite if it can. If not,
        // it will make a shader and call drawRect, as we do below.
        this->drawBitmap(draw, *bitmapPtr, matrix, paint);
        return;
    }

    // construct a shader, so we can call drawRect with the dst
    SkShader* s = SkShader::CreateBitmapShader(*bitmapPtr,
                                               SkShader::kClamp_TileMode,
                                               SkShader::kClamp_TileMode,
                                               &matrix);
    if (NULL == s) {
        return;
    }

    SkPaint paintWithShader(paint);
    paintWithShader.setStyle(SkPaint::kFill_Style);
    paintWithShader.setShader(s)->unref();

    // Call ourself, in case the subclass wanted to share this setup code
    // but handle the drawRect code themselves.
    this->drawRect(draw, *dstPtr, paintWithShader);
}
コード例 #28
0
ファイル: dashing.cpp プロジェクト: Arternis/skia
static void make_path_star(SkPath* path, const SkRect& bounds) {
    make_unit_star(path, 5);
    SkMatrix matrix;
    matrix.setRectToRect(path->getBounds(), bounds, SkMatrix::kCenter_ScaleToFit);
    path->transform(matrix);
}
コード例 #29
0
ファイル: SerializationTest.cpp プロジェクト: HansMuller/skia
DEF_TEST(Serialization, reporter) {
    // Test matrix serialization
    {
        SkMatrix matrix = SkMatrix::I();
        TestObjectSerialization(&matrix, reporter);
    }

    // Test path serialization
    {
        SkPath path;
        TestObjectSerialization(&path, reporter);
    }

    // Test region serialization
    {
        SkRegion region;
        TestObjectSerialization(&region, reporter);
    }

    // Test xfermode serialization
    {
        TestXfermodeSerialization(reporter);
    }

    // Test color filter serialization
    {
        TestColorFilterSerialization(reporter);
    }

    // Test string serialization
    {
        SkString string("string");
        TestObjectSerializationNoAlign<SkString, false>(&string, reporter);
        TestObjectSerializationNoAlign<SkString, true>(&string, reporter);
    }

    // Test rrect serialization
    {
        // SkRRect does not initialize anything.
        // An uninitialized SkRRect can be serialized,
        // but will branch on uninitialized data when deserialized.
        SkRRect rrect;
        SkRect rect = SkRect::MakeXYWH(1, 2, 20, 30);
        SkVector corners[4] = { {1, 2}, {2, 3}, {3,4}, {4,5} };
        rrect.setRectRadii(rect, corners);
        TestAlignment(&rrect, reporter);
    }

    // Test readByteArray
    {
        unsigned char data[kArraySize] = { 1, 2, 3 };
        TestArraySerialization(data, reporter);
    }

    // Test readColorArray
    {
        SkColor data[kArraySize] = { SK_ColorBLACK, SK_ColorWHITE, SK_ColorRED };
        TestArraySerialization(data, reporter);
    }

    // Test readIntArray
    {
        int32_t data[kArraySize] = { 1, 2, 4, 8 };
        TestArraySerialization(data, reporter);
    }

    // Test readPointArray
    {
        SkPoint data[kArraySize] = { {6, 7}, {42, 128} };
        TestArraySerialization(data, reporter);
    }

    // Test readScalarArray
    {
        SkScalar data[kArraySize] = { SK_Scalar1, SK_ScalarHalf, SK_ScalarMax };
        TestArraySerialization(data, reporter);
    }

    // Test invalid deserializations
    {
        SkImageInfo info = SkImageInfo::MakeN32Premul(kBitmapSize, kBitmapSize);

        SkBitmap validBitmap;
        validBitmap.setInfo(info);

        // Create a bitmap with a really large height
        SkBitmap invalidBitmap;
        invalidBitmap.setInfo(info.makeWH(info.width(), 1000000000));

        // The deserialization should succeed, and the rendering shouldn't crash,
        // even when the device fails to initialize, due to its size
        TestBitmapSerialization(validBitmap, invalidBitmap, true, reporter);
    }

    // Test simple SkPicture serialization
    {
        SkPictureRecorder recorder;
        draw_something(recorder.beginRecording(SkIntToScalar(kBitmapSize),
                                               SkIntToScalar(kBitmapSize),
                                               nullptr, 0));
        sk_sp<SkPicture> pict(recorder.finishRecordingAsPicture());

        // Serialize picture
        SkBinaryWriteBuffer writer;
        pict->flatten(writer);
        size_t size = writer.bytesWritten();
        SkAutoTMalloc<unsigned char> data(size);
        writer.writeToMemory(static_cast<void*>(data.get()));

        // Deserialize picture
        SkValidatingReadBuffer reader(static_cast<void*>(data.get()), size);
        sk_sp<SkPicture> readPict(SkPicture::MakeFromBuffer(reader));
        REPORTER_ASSERT(reporter, readPict.get());
    }

    TestPictureTypefaceSerialization(reporter);

    // Test SkLightingShader/NormalMapSource serialization
    {
        const int kTexSize = 2;

        SkLights::Builder builder;

        builder.add(SkLights::Light(SkColor3f::Make(1.0f, 1.0f, 1.0f),
                                    SkVector3::Make(1.0f, 0.0f, 0.0f)));
        builder.add(SkLights::Light(SkColor3f::Make(0.2f, 0.2f, 0.2f)));

        sk_sp<SkLights> fLights = builder.finish();

        SkBitmap diffuse = sk_tool_utils::create_checkerboard_bitmap(
                kTexSize, kTexSize,
                sk_tool_utils::color_to_565(0x0),
                sk_tool_utils::color_to_565(0xFF804020),
                8);

        SkRect bitmapBounds = SkRect::MakeIWH(diffuse.width(), diffuse.height());

        SkMatrix matrix;
        SkRect r = SkRect::MakeWH(SkIntToScalar(kTexSize), SkIntToScalar(kTexSize));
        matrix.setRectToRect(bitmapBounds, r, SkMatrix::kFill_ScaleToFit);

        SkMatrix ctm;
        ctm.setRotate(45);
        SkBitmap normals;
        normals.allocN32Pixels(kTexSize, kTexSize);

        sk_tool_utils::create_frustum_normal_map(&normals, SkIRect::MakeWH(kTexSize, kTexSize));
        sk_sp<SkShader> normalMap = SkShader::MakeBitmapShader(normals, SkShader::kClamp_TileMode,
                SkShader::kClamp_TileMode, &matrix);
        sk_sp<SkNormalSource> normalSource = SkNormalSource::MakeFromNormalMap(std::move(normalMap),
                                                                               ctm);
        sk_sp<SkShader> diffuseShader = SkShader::MakeBitmapShader(diffuse,
                SkShader::kClamp_TileMode, SkShader::kClamp_TileMode, &matrix);

        sk_sp<SkShader> lightingShader = SkLightingShader::Make(diffuseShader,
                                                                normalSource,
                                                                fLights);
        SkAutoTUnref<SkShader>(TestFlattenableSerialization(lightingShader.get(), true, reporter));

        lightingShader = SkLightingShader::Make(std::move(diffuseShader),
                                                nullptr,
                                                fLights);
        SkAutoTUnref<SkShader>(TestFlattenableSerialization(lightingShader.get(), true, reporter));

        lightingShader = SkLightingShader::Make(nullptr,
                                                std::move(normalSource),
                                                fLights);
        SkAutoTUnref<SkShader>(TestFlattenableSerialization(lightingShader.get(), true, reporter));

        lightingShader = SkLightingShader::Make(nullptr,
                                                nullptr,
                                                fLights);
        SkAutoTUnref<SkShader>(TestFlattenableSerialization(lightingShader.get(), true, reporter));
    }

    // Test NormalBevelSource serialization
    {
        sk_sp<SkNormalSource> bevelSource = SkNormalSource::MakeBevel(
                SkNormalSource::BevelType::kLinear, 2.0f, 5.0f);

        SkAutoTUnref<SkNormalSource>(TestFlattenableSerialization(bevelSource.get(), true,
                                                                  reporter));
        // TODO test equality?

    }
}