C++ SkMatrix::postConcat方法代码示例

void anchor_handle_renderer::draw_anchor (SkCanvas &canvas, const SkRect &rect, SkPaint &paint) const
{
  switch (m_node_type)
  {
    case handle_type::DIAMOND:
    {
      canvas.save ();
      canvas.translate (rect.centerX (), rect.centerY ());
      canvas.rotate (45);
      SkRect moved_rect = rect;
      moved_rect.offset (-rect.centerX (), -rect.centerY ());
      paint.setAntiAlias (true);
      canvas.drawRect (moved_rect, paint);
      canvas.restore ();
      break;
    }
    case handle_type::SQUARE:
      canvas.drawRect (rect, paint);
      break;
    case handle_type::CIRCLE:
      canvas.drawOval (rect, paint);
      break;
    case handle_type::DOUBLE_HEADED_ARROW:
    case handle_type::ROTATE_ARROW:
      SkPath path = qt2skia::path (*m_paths.at (m_node_type));
      SkMatrix trans;
      trans.setIdentity ();
      trans.postRotate (m_rotation_angle, 32, 32); // TODO: change all these to use info from path_storage (bounding box and center (possibly should be made 0))
      trans.postConcat (qt2skia::matrix (geom::rect2rect (QRectF (0, 0, 64, 64), qt2skia::rect (rect))));
      path.transform (trans);
      paint.setAntiAlias (true);
      canvas.drawPath (path, paint);
      break;
  }
}

void SkPDFDevice::drawBitmap(const SkDraw&, const SkBitmap& bitmap,
                             const SkIRect* srcRect,
                             const SkMatrix& matrix, const SkPaint& paint) {
    SkMatrix transform = matrix;
    transform.postConcat(fGraphicStack[fGraphicStackIndex].fTransform);
    internalDrawBitmap(transform, bitmap, srcRect, paint);
}

void SkPDFDevice::internalDrawBitmap(const SkMatrix& matrix,
                                     const SkBitmap& bitmap,
                                     const SkIRect* srcRect,
                                     const SkPaint& paint) {
    SkIRect subset = SkIRect::MakeWH(bitmap.width(), bitmap.height());
    if (srcRect && !subset.intersect(*srcRect))
        return;

    SkPDFImage* image = SkPDFImage::CreateImage(bitmap, subset, paint);
    if (!image)
        return;

    SkMatrix scaled;
    // Adjust for origin flip.
    scaled.setScale(1, -1);
    scaled.postTranslate(0, 1);
    // Scale the image up from 1x1 to WxH.
    scaled.postScale(SkIntToScalar(subset.width()),
                     SkIntToScalar(subset.height()));
    scaled.postConcat(matrix);
    SkMatrix curTransform = setTransform(scaled);
    updateGSFromPaint(paint, false);

    fXObjectResources.push(image);  // Transfer reference.
    fContent.writeText("/X");
    fContent.writeDecAsText(fXObjectResources.count() - 1);
    fContent.writeText(" Do\n");
    setTransform(curTransform);
}

DEF_TEST(RecordDraw_SetMatrixClobber, r) {
    // Set up an SkRecord that just scales by 2x,3x.
    SkRecord scaleRecord;
    SkRecorder scaleCanvas(&scaleRecord, W, H);
    SkMatrix scale;
    scale.setScale(2, 3);
    scaleCanvas.setMatrix(scale);

    // Set up an SkRecord with an initial +20, +20 translate.
    SkRecord translateRecord;
    SkRecorder translateCanvas(&translateRecord, W, H);
    SkMatrix translate;
    translate.setTranslate(20, 20);
    translateCanvas.setMatrix(translate);

    SkRecordDraw(scaleRecord, &translateCanvas, nullptr, nullptr, 0, nullptr/*bbh*/, nullptr/*callback*/);
    REPORTER_ASSERT(r, 4 == translateRecord.count());
    assert_type<SkRecords::SetMatrix>(r, translateRecord, 0);
    assert_type<SkRecords::Save>     (r, translateRecord, 1);
    assert_type<SkRecords::SetMatrix>(r, translateRecord, 2);
    assert_type<SkRecords::Restore>  (r, translateRecord, 3);

    // When we look at translateRecord now, it should have its first +20,+20 translate,
    // then a 2x,3x scale that's been concatted with that +20,+20 translate.
    const SkRecords::SetMatrix* setMatrix;
    setMatrix = assert_type<SkRecords::SetMatrix>(r, translateRecord, 0);
    REPORTER_ASSERT(r, setMatrix->matrix == translate);

    setMatrix = assert_type<SkRecords::SetMatrix>(r, translateRecord, 2);
    SkMatrix expected = scale;
    expected.postConcat(translate);
    REPORTER_ASSERT(r, setMatrix->matrix == expected);
}

    void onDraw(int loops, SkCanvas* canvas) override {
        SkPaint paint;
        paint.setAntiAlias(fAA);
        paint.setBlendMode(fMode);
        SkColor color = start_color(fColorType);

        int w = this->getSize().x();
        int h = this->getSize().y();

        static const SkScalar kRectW = 25.1f;
        static const SkScalar kRectH = 25.9f;

        if (fColorType == kShaderOpaque_ColorType) {
            // The only requirement for the shader is that it requires local coordinates
            SkPoint pts[2] = { {0.0f, 0.0f}, {kRectW, kRectH} };
            SkColor colors[] = { color, SK_ColorBLUE };
            paint.setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, 2,
                                                         SkTileMode::kClamp));
        }

        SkMatrix rotate;
        // This value was chosen so that we frequently hit the axis-aligned case.
        rotate.setRotate(30.f, kRectW / 2, kRectH / 2);
        SkMatrix m = rotate;

        SkScalar tx = 0, ty = 0;

        if (fPerspective) {
            // Apply some fixed perspective to change how ops may draw the rects
            SkMatrix perspective;
            perspective.setIdentity();
            perspective.setPerspX(1e-4f);
            perspective.setPerspY(1e-3f);
            perspective.setSkewX(0.1f);
            canvas->concat(perspective);
        }

        for (int i = 0; i < loops; ++i) {
            canvas->save();
            canvas->translate(tx, ty);
            canvas->concat(m);
            paint.setColor(color);
            color = advance_color(color, fColorType, i);

            canvas->drawRect(SkRect::MakeWH(kRectW, kRectH), paint);
            canvas->restore();

            tx += kRectW + 2;
            if (tx > w) {
                tx = 0;
                ty += kRectH + 2;
                if (ty > h) {
                    ty = 0;
                }
            }

            m.postConcat(rotate);
        }
    }

void Matrix::NativePostConcat(
    /* [in] */ Int64 nObj,
    /* [in] */ Int64 nOther)
{
    SkMatrix* matrix = reinterpret_cast<SkMatrix*>(nObj);
    SkMatrix* other = reinterpret_cast<SkMatrix*>(nOther);
    matrix->postConcat(*other);
}

const GrFragmentProcessor* SkImageShader::asFragmentProcessor(GrContext* context,
        const SkMatrix& viewM,
        const SkMatrix* localMatrix,
        SkFilterQuality filterQuality,
        GrProcessorDataManager* mgr) const {
    SkMatrix matrix;
    matrix.setIDiv(fImage->width(), fImage->height());

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

    SkShader::TileMode tm[] = { fTileModeX, 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(filterQuality, viewM, this->getLocalMatrix(), &doBicubic);
    GrTextureParams params(tm, textureFilterMode);

    SkImageUsageType usageType;
    if (kClamp_TileMode == fTileModeX && kClamp_TileMode == fTileModeY) {
        usageType = kUntiled_SkImageUsageType;
    } else if (GrTextureParams::kNone_FilterMode == textureFilterMode) {
        usageType = kTiled_Unfiltered_SkImageUsageType;
    } else {
        usageType = kTiled_Filtered_SkImageUsageType;
    }

    SkAutoTUnref<GrTexture> texture(as_IB(fImage)->asTextureRef(context, usageType));
    if (!texture) {
        return nullptr;
    }

    SkAutoTUnref<GrFragmentProcessor> inner;
    if (doBicubic) {
        inner.reset(GrBicubicEffect::Create(mgr, texture, matrix, tm));
    } else {
        inner.reset(GrSimpleTextureEffect::Create(mgr, texture, matrix, params));
    }

    if (GrPixelConfigIsAlphaOnly(texture->config())) {
        return SkRef(inner.get());
    }
    return GrFragmentProcessor::MulOuputByInputAlpha(inner);
}

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 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;
}

void SkMatrixImageFilter::computeFastBounds(const SkRect& src, SkRect* dst) const {
    SkRect bounds = src;
    if (getInput(0)) {
        getInput(0)->computeFastBounds(src, &bounds);
    }
    SkMatrix matrix;
    matrix.setTranslate(-bounds.x(), -bounds.y());
    matrix.postConcat(fTransform);
    matrix.postTranslate(bounds.x(), bounds.y());
    matrix.mapRect(dst, bounds);
}

SkMatrix View::currentTransformMatrix(View* ancestor)
{
    SkMatrix m;
    m.reset();
    View* v = this;
    while (v && v != ancestor) {
        m.postConcat(v->matrix());
        v = v->m_parent;
    }
    return m;
}

void SKPAnimationBench::drawPicture() {
    SkMatrix frameMatrix = SkMatrix::MakeTrans(-fCenter.fX, -fCenter.fY);
    frameMatrix.postConcat(fAnimationMatrix);
    SkMatrix reverseTranslate = SkMatrix::MakeTrans(fCenter.fX, fCenter.fY);
    frameMatrix.postConcat(reverseTranslate);

    SkMatrix currentMatrix = frameMatrix;
    for (int i = 0; i < fSteps; i++) {
        for (int j = 0; j < this->tileRects().count(); ++j) {
            SkMatrix trans = SkMatrix::MakeTrans(-1.f * this->tileRects()[j].fLeft,
                                                 -1.f * this->tileRects()[j].fTop);
            SkMatrix tileMatrix = currentMatrix;
            tileMatrix.postConcat(trans);
            this->surfaces()[j]->getCanvas()->drawPicture(this->picture(), &tileMatrix, NULL);
        }

        for (int j = 0; j < this->tileRects().count(); ++j) {
           this->surfaces()[j]->getCanvas()->flush();
        }
        currentMatrix.postConcat(frameMatrix);
    }
}

bool SkMatrixImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
                                         SkIRect* dst) const {
    SkMatrix transformInverse;
    if (!fTransform.invert(&transformInverse)) {
        return false;
    }
    SkMatrix matrix;
    if (!ctm.invert(&matrix)) {
        return false;
    }
    matrix.postConcat(transformInverse);
    matrix.postConcat(ctm);
    SkRect floatBounds;
    matrix.mapRect(&floatBounds, SkRect::Make(src));
    SkIRect bounds = floatBounds.roundOut();
    if (getInput(0) && !getInput(0)->filterBounds(bounds, ctm, &bounds)) {
        return false;
    }

    *dst = bounds;
    return true;
}

void SkPictureStateTree::Iterator::setCurrentMatrix(const SkMatrix* matrix) {
    SkASSERT(NULL != matrix);

    if (matrix == fCurrentMatrix) {
        return;
    }

    // The matrix is in recording space, but we also inherit
    // a playback matrix from out target canvas.
    SkMatrix m = *matrix;
    m.postConcat(fPlaybackMatrix);
    fCanvas->setMatrix(m);
    fCurrentMatrix = matrix;
}

sk_sp<GrFragmentProcessor> SkImageShader::asFragmentProcessor(const AsFPArgs& args) const {
    SkMatrix matrix;
    matrix.setIDiv(fImage->width(), fImage->height());

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

    SkShader::TileMode tm[] = { fTileModeX, 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(args.fFilterQuality, *args.fViewMatrix, this->getLocalMatrix(),
                                        &doBicubic);
    GrTextureParams params(tm, textureFilterMode);
    SkAutoTUnref<GrTexture> texture(as_IB(fImage)->asTextureRef(args.fContext, params,
                                    args.fGammaTreatment));
    if (!texture) {
        return nullptr;
    }

    sk_sp<GrFragmentProcessor> inner;
    if (doBicubic) {
        inner = GrBicubicEffect::Make(texture, nullptr, matrix, tm);
    } else {
        inner = GrSimpleTextureEffect::Make(texture, nullptr, matrix, params);
    }

    if (GrPixelConfigIsAlphaOnly(texture->config())) {
        return inner;
    }
    return sk_sp<GrFragmentProcessor>(GrFragmentProcessor::MulOutputByInputAlpha(std::move(inner)));
}