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      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you mPrimitiveFields.may not use this file except in compliance with the License.
      6  * You mPrimitiveFields.may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include "RenderProperties.h"
     18 
     19 #include <utils/Trace.h>
     20 
     21 #include <SkColorFilter.h>
     22 #include <SkMatrix.h>
     23 #include <SkPath.h>
     24 #include <SkPathOps.h>
     25 
     26 #include "Matrix.h"
     27 #include "hwui/Canvas.h"
     28 #include "utils/MathUtils.h"
     29 
     30 namespace android {
     31 namespace uirenderer {
     32 
     33 LayerProperties::LayerProperties() {
     34     reset();
     35 }
     36 
     37 LayerProperties::~LayerProperties() {
     38     setType(LayerType::None);
     39 }
     40 
     41 void LayerProperties::reset() {
     42     mOpaque = false;
     43     setFromPaint(nullptr);
     44 }
     45 
     46 bool LayerProperties::setColorFilter(SkColorFilter* filter) {
     47     if (mColorFilter == filter) return false;
     48     SkRefCnt_SafeAssign(mColorFilter, filter);
     49     return true;
     50 }
     51 
     52 bool LayerProperties::setFromPaint(const SkPaint* paint) {
     53     bool changed = false;
     54     changed |= setAlpha(static_cast<uint8_t>(PaintUtils::getAlphaDirect(paint)));
     55     changed |= setXferMode(PaintUtils::getBlendModeDirect(paint));
     56     changed |= setColorFilter(paint ? paint->getColorFilter() : nullptr);
     57     return changed;
     58 }
     59 
     60 LayerProperties& LayerProperties::operator=(const LayerProperties& other) {
     61     setType(other.type());
     62     setOpaque(other.opaque());
     63     setAlpha(other.alpha());
     64     setXferMode(other.xferMode());
     65     setColorFilter(other.colorFilter());
     66     return *this;
     67 }
     68 
     69 RenderProperties::ComputedFields::ComputedFields() : mTransformMatrix(nullptr) {}
     70 
     71 RenderProperties::ComputedFields::~ComputedFields() {
     72     delete mTransformMatrix;
     73 }
     74 
     75 RenderProperties::RenderProperties() : mStaticMatrix(nullptr), mAnimationMatrix(nullptr) {}
     76 
     77 RenderProperties::~RenderProperties() {
     78     delete mStaticMatrix;
     79     delete mAnimationMatrix;
     80 }
     81 
     82 RenderProperties& RenderProperties::operator=(const RenderProperties& other) {
     83     if (this != &other) {
     84         mPrimitiveFields = other.mPrimitiveFields;
     85         setStaticMatrix(other.getStaticMatrix());
     86         setAnimationMatrix(other.getAnimationMatrix());
     87         setCameraDistance(other.getCameraDistance());
     88         mLayerProperties = other.layerProperties();
     89 
     90         // Force recalculation of the matrix, since other's dirty bit may be clear
     91         mPrimitiveFields.mMatrixOrPivotDirty = true;
     92         updateMatrix();
     93     }
     94     return *this;
     95 }
     96 
     97 static void dumpMatrix(std::ostream& output, std::string& indent, const char* label,
     98                        SkMatrix* matrix) {
     99     if (matrix) {
    100         output << indent << "(" << label << " " << matrix << ": ";
    101         output << std::fixed << std::setprecision(2);
    102         output << "[" << matrix->get(0) << " " << matrix->get(1) << " " << matrix->get(2) << "]";
    103         output << " [" << matrix->get(3) << " " << matrix->get(4) << " " << matrix->get(5) << "]";
    104         output << " [" << matrix->get(6) << " " << matrix->get(7) << " " << matrix->get(8) << "]";
    105         output << ")" << std::endl;
    106     }
    107 }
    108 
    109 void RenderProperties::debugOutputProperties(std::ostream& output, const int level) const {
    110     auto indent = std::string(level * 2, ' ');
    111     if (mPrimitiveFields.mLeft != 0 || mPrimitiveFields.mTop != 0) {
    112         output << indent << "(Translate (left, top) " << mPrimitiveFields.mLeft << ", "
    113                << mPrimitiveFields.mTop << ")" << std::endl;
    114     }
    115     dumpMatrix(output, indent, "ConcatMatrix (static)", mStaticMatrix);
    116     dumpMatrix(output, indent, "ConcatMatrix (animation)", mAnimationMatrix);
    117 
    118     output << std::fixed << std::setprecision(2);
    119     if (hasTransformMatrix()) {
    120         if (isTransformTranslateOnly()) {
    121             output << indent << "(Translate " << getTranslationX() << ", " << getTranslationY()
    122                    << ", " << getZ() << ")" << std::endl;
    123         } else {
    124             dumpMatrix(output, indent, "ConcatMatrix ", mComputedFields.mTransformMatrix);
    125         }
    126     }
    127 
    128     const bool isLayer = effectiveLayerType() != LayerType::None;
    129     int clipFlags = getClippingFlags();
    130     if (mPrimitiveFields.mAlpha < 1 && !MathUtils::isZero(mPrimitiveFields.mAlpha)) {
    131         if (isLayer) {
    132             clipFlags &= ~CLIP_TO_BOUNDS;  // bounds clipping done by layer
    133         }
    134 
    135         if (CC_LIKELY(isLayer || !getHasOverlappingRendering())) {
    136             // simply scale rendering content's alpha
    137             output << indent << "(ScaleAlpha " << mPrimitiveFields.mAlpha << ")" << std::endl;
    138         } else {
    139             // savelayeralpha to create an offscreen buffer to apply alpha
    140             Rect layerBounds(0, 0, getWidth(), getHeight());
    141             if (clipFlags) {
    142                 getClippingRectForFlags(clipFlags, &layerBounds);
    143                 clipFlags = 0;  // all clipping done by savelayer
    144             }
    145             output << indent << "(SaveLayerAlpha " << (int)layerBounds.left << ", "
    146                    << (int)layerBounds.top << ", " << (int)layerBounds.right << ", "
    147                    << (int)layerBounds.bottom << ", " << (int)(mPrimitiveFields.mAlpha * 255)
    148                    << ", 0x" << std::hex << (SaveFlags::HasAlphaLayer | SaveFlags::ClipToLayer)
    149                    << ")" << std::dec << std::endl;
    150         }
    151     }
    152 
    153     if (clipFlags) {
    154         Rect clipRect;
    155         getClippingRectForFlags(clipFlags, &clipRect);
    156         output << indent << "(ClipRect " << (int)clipRect.left << ", " << (int)clipRect.top << ", "
    157                << (int)clipRect.right << ", " << (int)clipRect.bottom << ")" << std::endl;
    158     }
    159 
    160     if (getRevealClip().willClip()) {
    161         Rect bounds;
    162         getRevealClip().getBounds(&bounds);
    163         output << indent << "(Clip to reveal clip with bounds " << bounds.left << ", " << bounds.top
    164                << ", " << bounds.right << ", " << bounds.bottom << ")" << std::endl;
    165     }
    166 
    167     auto& outline = mPrimitiveFields.mOutline;
    168     if (outline.getShouldClip()) {
    169         if (outline.isEmpty()) {
    170             output << indent << "(Clip to empty outline)";
    171         } else if (outline.willClip()) {
    172             const Rect& bounds = outline.getBounds();
    173             output << indent << "(Clip to outline with bounds " << bounds.left << ", " << bounds.top
    174                    << ", " << bounds.right << ", " << bounds.bottom << ")" << std::endl;
    175         }
    176     }
    177 }
    178 
    179 void RenderProperties::updateMatrix() {
    180     if (mPrimitiveFields.mMatrixOrPivotDirty) {
    181         if (!mComputedFields.mTransformMatrix) {
    182             // only allocate a mPrimitiveFields.matrix if we have a complex transform
    183             mComputedFields.mTransformMatrix = new SkMatrix();
    184         }
    185         if (!mPrimitiveFields.mPivotExplicitlySet) {
    186             mPrimitiveFields.mPivotX = mPrimitiveFields.mWidth / 2.0f;
    187             mPrimitiveFields.mPivotY = mPrimitiveFields.mHeight / 2.0f;
    188         }
    189         SkMatrix* transform = mComputedFields.mTransformMatrix;
    190         transform->reset();
    191         if (MathUtils::isZero(getRotationX()) && MathUtils::isZero(getRotationY())) {
    192             transform->setTranslate(getTranslationX(), getTranslationY());
    193             transform->preRotate(getRotation(), getPivotX(), getPivotY());
    194             transform->preScale(getScaleX(), getScaleY(), getPivotX(), getPivotY());
    195         } else {
    196             SkMatrix transform3D;
    197             mComputedFields.mTransformCamera.save();
    198             transform->preScale(getScaleX(), getScaleY(), getPivotX(), getPivotY());
    199             mComputedFields.mTransformCamera.rotateX(mPrimitiveFields.mRotationX);
    200             mComputedFields.mTransformCamera.rotateY(mPrimitiveFields.mRotationY);
    201             mComputedFields.mTransformCamera.rotateZ(-mPrimitiveFields.mRotation);
    202             mComputedFields.mTransformCamera.getMatrix(&transform3D);
    203             transform3D.preTranslate(-getPivotX(), -getPivotY());
    204             transform3D.postTranslate(getPivotX() + getTranslationX(),
    205                                       getPivotY() + getTranslationY());
    206             transform->postConcat(transform3D);
    207             mComputedFields.mTransformCamera.restore();
    208         }
    209         mPrimitiveFields.mMatrixOrPivotDirty = false;
    210     }
    211 }
    212 
    213 } /* namespace uirenderer */
    214 } /* namespace android */
    215