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platform_frameworks_base/libs/hwui/SkiaCanvas.cpp

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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "SkiaCanvas.h"
#include "CanvasProperty.h"
#include "NinePatchUtils.h"
#include "VectorDrawable.h"
#include "hwui/Bitmap.h"
#include "hwui/MinikinUtils.h"
#include "hwui/PaintFilter.h"
#include "pipeline/skia/AnimatedDrawables.h"
#include "pipeline/skia/HolePunch.h"
#include <SkAndroidFrameworkUtils.h>
#include <SkAnimatedImage.h>
#include <SkCanvasPriv.h>
#include <SkCanvasStateUtils.h>
#include <SkColorFilter.h>
#include <SkDeque.h>
#include <SkDrawable.h>
#include <SkFont.h>
#include <SkGraphics.h>
#include <SkImage.h>
#include <SkImagePriv.h>
#include <SkPicture.h>
#include <SkRSXform.h>
#include <SkShader.h>
#include <SkTemplates.h>
#include <SkTextBlob.h>
#include <SkVertices.h>
#include <memory>
#include <optional>
#include <utility>
namespace android {
using uirenderer::PaintUtils;
Canvas* Canvas::create_canvas(const SkBitmap& bitmap) {
return new SkiaCanvas(bitmap);
}
Canvas* Canvas::create_canvas(SkCanvas* skiaCanvas) {
return new SkiaCanvas(skiaCanvas);
}
SkiaCanvas::SkiaCanvas() {}
SkiaCanvas::SkiaCanvas(SkCanvas* canvas) : mCanvas(canvas) {}
SkiaCanvas::SkiaCanvas(const SkBitmap& bitmap) {
mCanvasOwned = std::unique_ptr<SkCanvas>(new SkCanvas(bitmap));
mCanvas = mCanvasOwned.get();
}
SkiaCanvas::~SkiaCanvas() {}
void SkiaCanvas::reset(SkCanvas* skiaCanvas) {
if (mCanvas != skiaCanvas) {
mCanvas = skiaCanvas;
mCanvasOwned.reset();
}
mSaveStack.reset(nullptr);
}
// ----------------------------------------------------------------------------
// Canvas state operations: Replace Bitmap
// ----------------------------------------------------------------------------
void SkiaCanvas::setBitmap(const SkBitmap& bitmap) {
// deletes the previously owned canvas (if any)
mCanvasOwned.reset(new SkCanvas(bitmap));
mCanvas = mCanvasOwned.get();
// clean up the old save stack
mSaveStack.reset(nullptr);
}
// ----------------------------------------------------------------------------
// Canvas state operations
// ----------------------------------------------------------------------------
bool SkiaCanvas::isOpaque() {
return mCanvas->imageInfo().isOpaque();
}
int SkiaCanvas::width() {
return mCanvas->imageInfo().width();
}
int SkiaCanvas::height() {
return mCanvas->imageInfo().height();
}
// ----------------------------------------------------------------------------
// Canvas state operations: Save (layer)
// ----------------------------------------------------------------------------
int SkiaCanvas::getSaveCount() const {
return mCanvas->getSaveCount();
}
int SkiaCanvas::save(SaveFlags::Flags flags) {
int count = mCanvas->save();
recordPartialSave(flags);
return count;
}
// The SkiaCanvas::restore operation layers on the capability to preserve
// either (or both) the matrix and/or clip state after a SkCanvas::restore
// operation. It does this by explicitly saving off the clip & matrix state
// when requested and playing it back after the SkCanvas::restore.
void SkiaCanvas::restore() {
const auto* rec = this->currentSaveRec();
if (!rec) {
// Fast path - no record for this frame.
mCanvas->restore();
return;
}
bool preserveMatrix = !(rec->saveFlags & SaveFlags::Matrix);
bool preserveClip = !(rec->saveFlags & SaveFlags::Clip);
SkMatrix savedMatrix;
if (preserveMatrix) {
savedMatrix = mCanvas->getTotalMatrix();
}
const size_t clipIndex = rec->clipIndex;
mCanvas->restore();
mSaveStack->pop_back();
if (preserveMatrix) {
mCanvas->setMatrix(savedMatrix);
}
if (preserveClip) {
this->applyPersistentClips(clipIndex);
}
}
void SkiaCanvas::restoreToCount(int restoreCount) {
while (mCanvas->getSaveCount() > restoreCount) {
this->restore();
}
}
int SkiaCanvas::saveLayer(float left, float top, float right, float bottom, const SkPaint* paint) {
const SkRect bounds = SkRect::MakeLTRB(left, top, right, bottom);
const SkCanvas::SaveLayerRec rec(&bounds, paint);
return mCanvas->saveLayer(rec);
}
int SkiaCanvas::saveLayerAlpha(float left, float top, float right, float bottom, int alpha) {
if (static_cast<unsigned>(alpha) < 0xFF) {
SkPaint alphaPaint;
alphaPaint.setAlpha(alpha);
return this->saveLayer(left, top, right, bottom, &alphaPaint);
}
return this->saveLayer(left, top, right, bottom, nullptr);
}
int SkiaCanvas::saveUnclippedLayer(int left, int top, int right, int bottom) {
SkRect bounds = SkRect::MakeLTRB(left, top, right, bottom);
return SkAndroidFrameworkUtils::SaveBehind(mCanvas, &bounds);
}
void SkiaCanvas::restoreUnclippedLayer(int restoreCount, const SkPaint& paint) {
while (mCanvas->getSaveCount() > restoreCount + 1) {
this->restore();
}
if (mCanvas->getSaveCount() == restoreCount + 1) {
SkCanvasPriv::DrawBehind(mCanvas, filterPaint(paint));
this->restore();
}
}
class SkiaCanvas::Clip {
public:
Clip(const SkRect& rect, SkClipOp op, const SkMatrix& m)
: mType(Type::Rect), mOp(op), mMatrix(m), mRRect(SkRRect::MakeRect(rect)) {}
Clip(const SkRRect& rrect, SkClipOp op, const SkMatrix& m)
: mType(Type::RRect), mOp(op), mMatrix(m), mRRect(rrect) {}
Clip(const SkPath& path, SkClipOp op, const SkMatrix& m)
: mType(Type::Path), mOp(op), mMatrix(m), mPath(std::in_place, path) {}
void apply(SkCanvas* canvas) const {
canvas->setMatrix(mMatrix);
switch (mType) {
case Type::Rect:
// Don't anti-alias rectangular clips
canvas->clipRect(mRRect.rect(), mOp, false);
break;
case Type::RRect:
// Ensure rounded rectangular clips are anti-aliased
canvas->clipRRect(mRRect, mOp, true);
break;
case Type::Path:
// Ensure path clips are anti-aliased
canvas->clipPath(mPath.value(), mOp, true);
break;
}
}
private:
enum class Type {
Rect,
RRect,
Path,
};
Type mType;
SkClipOp mOp;
SkMatrix mMatrix;
// These are logically a union (tracked separately due to non-POD path).
std::optional<SkPath> mPath;
SkRRect mRRect;
};
const SkiaCanvas::SaveRec* SkiaCanvas::currentSaveRec() const {
const SaveRec* rec = mSaveStack ? static_cast<const SaveRec*>(mSaveStack->back()) : nullptr;
int currentSaveCount = mCanvas->getSaveCount();
SkASSERT(!rec || currentSaveCount >= rec->saveCount);
return (rec && rec->saveCount == currentSaveCount) ? rec : nullptr;
}
void SkiaCanvas::punchHole(const SkRRect& rect) {
SkPaint paint = SkPaint();
paint.setColor(0);
paint.setBlendMode(SkBlendMode::kClear);
mCanvas->drawRRect(rect, paint);
}
// ----------------------------------------------------------------------------
// functions to emulate legacy SaveFlags (i.e. independent matrix/clip flags)
// ----------------------------------------------------------------------------
void SkiaCanvas::recordPartialSave(SaveFlags::Flags flags) {
// A partial save is a save operation which doesn't capture the full canvas state.
// (either SaveFlags::Matrix or SaveFlags::Clip is missing).
// Mask-out non canvas state bits.
flags &= SaveFlags::MatrixClip;
if (flags == SaveFlags::MatrixClip) {
// not a partial save.
return;
}
if (!mSaveStack) {
mSaveStack.reset(new SkDeque(sizeof(struct SaveRec), 8));
}
SaveRec* rec = static_cast<SaveRec*>(mSaveStack->push_back());
rec->saveCount = mCanvas->getSaveCount();
rec->saveFlags = flags;
rec->clipIndex = mClipStack.size();
}
template <typename T>
void SkiaCanvas::recordClip(const T& clip, SkClipOp op) {
// Only need tracking when in a partial save frame which
// doesn't restore the clip.
const SaveRec* rec = this->currentSaveRec();
if (rec && !(rec->saveFlags & SaveFlags::Clip)) {
mClipStack.emplace_back(clip, op, mCanvas->getTotalMatrix());
}
}
// Applies and optionally removes all clips >= index.
void SkiaCanvas::applyPersistentClips(size_t clipStartIndex) {
SkASSERT(clipStartIndex <= mClipStack.size());
const auto begin = mClipStack.cbegin() + clipStartIndex;
const auto end = mClipStack.cend();
// Clip application mutates the CTM.
const SkMatrix saveMatrix = mCanvas->getTotalMatrix();
for (auto clip = begin; clip != end; ++clip) {
clip->apply(mCanvas);
}
mCanvas->setMatrix(saveMatrix);
// If the current/post-restore save rec is also persisting clips, we
// leave them on the stack to be reapplied part of the next restore().
// Otherwise we're done and just pop them.
const auto* rec = this->currentSaveRec();
if (!rec || (rec->saveFlags & SaveFlags::Clip)) {
mClipStack.erase(begin, end);
}
}
// ----------------------------------------------------------------------------
// Canvas state operations: Matrix
// ----------------------------------------------------------------------------
void SkiaCanvas::getMatrix(SkMatrix* outMatrix) const {
*outMatrix = mCanvas->getTotalMatrix();
}
void SkiaCanvas::setMatrix(const SkMatrix& matrix) {
mCanvas->setMatrix(matrix);
}
void SkiaCanvas::concat(const SkMatrix& matrix) {
mCanvas->concat(matrix);
}
void SkiaCanvas::rotate(float degrees) {
mCanvas->rotate(degrees);
}
void SkiaCanvas::scale(float sx, float sy) {
mCanvas->scale(sx, sy);
}
void SkiaCanvas::skew(float sx, float sy) {
mCanvas->skew(sx, sy);
}
void SkiaCanvas::translate(float dx, float dy) {
mCanvas->translate(dx, dy);
}
// ----------------------------------------------------------------------------
// Canvas state operations: Clips
// ----------------------------------------------------------------------------
// This function is a mirror of SkCanvas::getClipBounds except that it does
// not outset the edge of the clip to account for anti-aliasing. There is
// a skia bug to investigate pushing this logic into back into skia.
// (see https://code.google.com/p/skia/issues/detail?id=1303)
bool SkiaCanvas::getClipBounds(SkRect* outRect) const {
SkIRect ibounds;
if (!mCanvas->getDeviceClipBounds(&ibounds)) {
return false;
}
SkMatrix inverse;
// if we can't invert the CTM, we can't return local clip bounds
if (!mCanvas->getTotalMatrix().invert(&inverse)) {
if (outRect) {
outRect->setEmpty();
}
return false;
}
if (NULL != outRect) {
SkRect r = SkRect::Make(ibounds);
inverse.mapRect(outRect, r);
}
return true;
}
bool SkiaCanvas::quickRejectRect(float left, float top, float right, float bottom) const {
SkRect bounds = SkRect::MakeLTRB(left, top, right, bottom);
return mCanvas->quickReject(bounds);
}
bool SkiaCanvas::quickRejectPath(const SkPath& path) const {
return mCanvas->quickReject(path);
}
bool SkiaCanvas::clipRect(float left, float top, float right, float bottom, SkClipOp op) {
SkRect rect = SkRect::MakeLTRB(left, top, right, bottom);
this->recordClip(rect, op);
mCanvas->clipRect(rect, op);
return !mCanvas->isClipEmpty();
}
bool SkiaCanvas::clipPath(const SkPath* path, SkClipOp op) {
this->recordClip(*path, op);
mCanvas->clipPath(*path, op, true);
return !mCanvas->isClipEmpty();
}
// ----------------------------------------------------------------------------
// Canvas state operations: Filters
// ----------------------------------------------------------------------------
PaintFilter* SkiaCanvas::getPaintFilter() {
return mPaintFilter.get();
}
void SkiaCanvas::setPaintFilter(sk_sp<PaintFilter> paintFilter) {
mPaintFilter = std::move(paintFilter);
}
// ----------------------------------------------------------------------------
// Canvas state operations: Capture
// ----------------------------------------------------------------------------
SkCanvasState* SkiaCanvas::captureCanvasState() const {
SkCanvas* canvas = mCanvas;
if (mCanvasOwned) {
// Important to use the underlying SkCanvas, not the wrapper.
canvas = mCanvasOwned.get();
}
// Workarounds for http://crbug.com/271096: SW draw only supports
// translate & scale transforms, and a simple rectangular clip.
// (This also avoids significant wasted time in calling
// SkCanvasStateUtils::CaptureCanvasState when the clip is complex).
if (!canvas->isClipRect() || (canvas->getTotalMatrix().getType() &
~(SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask))) {
return nullptr;
}
return SkCanvasStateUtils::CaptureCanvasState(canvas);
}
// ----------------------------------------------------------------------------
// Canvas draw operations
// ----------------------------------------------------------------------------
void SkiaCanvas::drawColor(int color, SkBlendMode mode) {
mCanvas->drawColor(color, mode);
}
void SkiaCanvas::onFilterPaint(SkPaint& paint) {
if (mPaintFilter) {
mPaintFilter->filter(&paint);
}
}
void SkiaCanvas::drawPaint(const SkPaint& paint) {
mCanvas->drawPaint(filterPaint(paint));
}
// ----------------------------------------------------------------------------
// Canvas draw operations: Geometry
// ----------------------------------------------------------------------------
void SkiaCanvas::drawPoints(const float* points, int count, const Paint& paint,
SkCanvas::PointMode mode) {
if (CC_UNLIKELY(count < 2 || paint.nothingToDraw())) return;
// convert the floats into SkPoints
count >>= 1; // now it is the number of points
std::unique_ptr<SkPoint[]> pts(new SkPoint[count]);
for (int i = 0; i < count; i++) {
pts[i].set(points[0], points[1]);
points += 2;
}
applyLooper(&paint, [&](const SkPaint& p) { mCanvas->drawPoints(mode, count, pts.get(), p); });
}
void SkiaCanvas::drawPoint(float x, float y, const Paint& paint) {
applyLooper(&paint, [&](const SkPaint& p) { mCanvas->drawPoint(x, y, p); });
}
void SkiaCanvas::drawPoints(const float* points, int count, const Paint& paint) {
this->drawPoints(points, count, paint, SkCanvas::kPoints_PointMode);
}
void SkiaCanvas::drawLine(float startX, float startY, float stopX, float stopY,
const Paint& paint) {
applyLooper(&paint,
[&](const SkPaint& p) { mCanvas->drawLine(startX, startY, stopX, stopY, p); });
}
void SkiaCanvas::drawLines(const float* points, int count, const Paint& paint) {
if (CC_UNLIKELY(count < 4 || paint.nothingToDraw())) return;
this->drawPoints(points, count, paint, SkCanvas::kLines_PointMode);
}
void SkiaCanvas::drawRect(float left, float top, float right, float bottom, const Paint& paint) {
if (CC_UNLIKELY(paint.nothingToDraw())) return;
applyLooper(&paint, [&](const SkPaint& p) {
mCanvas->drawRect({left, top, right, bottom}, p);
});
}
void SkiaCanvas::drawRegion(const SkRegion& region, const Paint& paint) {
if (CC_UNLIKELY(paint.nothingToDraw())) return;
applyLooper(&paint, [&](const SkPaint& p) { mCanvas->drawRegion(region, p); });
}
void SkiaCanvas::drawRoundRect(float left, float top, float right, float bottom, float rx, float ry,
const Paint& paint) {
if (CC_UNLIKELY(paint.nothingToDraw())) return;
SkRect rect = SkRect::MakeLTRB(left, top, right, bottom);
applyLooper(&paint, [&](const SkPaint& p) { mCanvas->drawRoundRect(rect, rx, ry, p); });
}
void SkiaCanvas::drawDoubleRoundRect(const SkRRect& outer, const SkRRect& inner,
const Paint& paint) {
applyLooper(&paint, [&](const SkPaint& p) { mCanvas->drawDRRect(outer, inner, p); });
}
void SkiaCanvas::drawCircle(float x, float y, float radius, const Paint& paint) {
if (CC_UNLIKELY(radius <= 0 || paint.nothingToDraw())) return;
applyLooper(&paint, [&](const SkPaint& p) { mCanvas->drawCircle(x, y, radius, p); });
}
void SkiaCanvas::drawOval(float left, float top, float right, float bottom, const Paint& paint) {
if (CC_UNLIKELY(paint.nothingToDraw())) return;
SkRect oval = SkRect::MakeLTRB(left, top, right, bottom);
applyLooper(&paint, [&](const SkPaint& p) { mCanvas->drawOval(oval, p); });
}
void SkiaCanvas::drawArc(float left, float top, float right, float bottom, float startAngle,
float sweepAngle, bool useCenter, const Paint& paint) {
if (CC_UNLIKELY(paint.nothingToDraw())) return;
SkRect arc = SkRect::MakeLTRB(left, top, right, bottom);
applyLooper(&paint, [&](const SkPaint& p) {
if (fabs(sweepAngle) >= 360.0f) {
mCanvas->drawOval(arc, p);
} else {
mCanvas->drawArc(arc, startAngle, sweepAngle, useCenter, p);
}
});
}
void SkiaCanvas::drawPath(const SkPath& path, const Paint& paint) {
if (CC_UNLIKELY(paint.nothingToDraw())) return;
if (CC_UNLIKELY(path.isEmpty() && (!path.isInverseFillType()))) {
return;
}
applyLooper(&paint, [&](const SkPaint& p) { mCanvas->drawPath(path, p); });
}
void SkiaCanvas::drawVertices(const SkVertices* vertices, SkBlendMode mode, const Paint& paint) {
applyLooper(&paint, [&](const SkPaint& p) { mCanvas->drawVertices(vertices, mode, p); });
}
// ----------------------------------------------------------------------------
// Canvas draw operations: Bitmaps
// ----------------------------------------------------------------------------
void SkiaCanvas::drawBitmap(Bitmap& bitmap, float left, float top, const Paint* paint) {
auto image = bitmap.makeImage();
applyLooper(paint, [&](const SkPaint& p) {
auto sampling = SkSamplingOptions(p.getFilterQuality());
mCanvas->drawImage(image, left, top, sampling, &p);
});
}
void SkiaCanvas::drawBitmap(Bitmap& bitmap, const SkMatrix& matrix, const Paint* paint) {
auto image = bitmap.makeImage();
SkAutoCanvasRestore acr(mCanvas, true);
mCanvas->concat(matrix);
applyLooper(paint, [&](const SkPaint& p) {
auto sampling = SkSamplingOptions(p.getFilterQuality());
mCanvas->drawImage(image, 0, 0, sampling, &p);
});
}
void SkiaCanvas::drawBitmap(Bitmap& bitmap, float srcLeft, float srcTop, float srcRight,
float srcBottom, float dstLeft, float dstTop, float dstRight,
float dstBottom, const Paint* paint) {
auto image = bitmap.makeImage();
SkRect srcRect = SkRect::MakeLTRB(srcLeft, srcTop, srcRight, srcBottom);
SkRect dstRect = SkRect::MakeLTRB(dstLeft, dstTop, dstRight, dstBottom);
applyLooper(paint, [&](const SkPaint& p) {
auto sampling = SkSamplingOptions(p.getFilterQuality());
mCanvas->drawImageRect(image, srcRect, dstRect, sampling, &p,
SkCanvas::kFast_SrcRectConstraint);
});
}
static SkFilterMode paintToFilter(const Paint* paint) {
return paint && paint->isFilterBitmap() ? SkFilterMode::kLinear
: SkFilterMode::kNearest;
}
void SkiaCanvas::drawBitmapMesh(Bitmap& bitmap, int meshWidth, int meshHeight,
const float* vertices, const int* colors, const Paint* paint) {
const int ptCount = (meshWidth + 1) * (meshHeight + 1);
const int indexCount = meshWidth * meshHeight * 6;
uint32_t flags = SkVertices::kHasTexCoords_BuilderFlag;
if (colors) {
flags |= SkVertices::kHasColors_BuilderFlag;
}
SkVertices::Builder builder(SkVertices::kTriangles_VertexMode, ptCount, indexCount, flags);
memcpy(builder.positions(), vertices, ptCount * sizeof(SkPoint));
if (colors) {
memcpy(builder.colors(), colors, ptCount * sizeof(SkColor));
}
SkPoint* texs = builder.texCoords();
uint16_t* indices = builder.indices();
// cons up texture coordinates and indices
{
const SkScalar w = SkIntToScalar(bitmap.width());
const SkScalar h = SkIntToScalar(bitmap.height());
const SkScalar dx = w / meshWidth;
const SkScalar dy = h / meshHeight;
SkPoint* texsPtr = texs;
SkScalar y = 0;
for (int i = 0; i <= meshHeight; i++) {
if (i == meshHeight) {
y = h; // to ensure numerically we hit h exactly
}
SkScalar x = 0;
for (int j = 0; j < meshWidth; j++) {
texsPtr->set(x, y);
texsPtr += 1;
x += dx;
}
texsPtr->set(w, y);
texsPtr += 1;
y += dy;
}
SkASSERT(texsPtr - texs == ptCount);
}
// cons up indices
{
uint16_t* indexPtr = indices;
int index = 0;
for (int i = 0; i < meshHeight; i++) {
for (int j = 0; j < meshWidth; j++) {
// lower-left triangle
*indexPtr++ = index;
*indexPtr++ = index + meshWidth + 1;
*indexPtr++ = index + meshWidth + 2;
// upper-right triangle
*indexPtr++ = index;
*indexPtr++ = index + meshWidth + 2;
*indexPtr++ = index + 1;
// bump to the next cell
index += 1;
}
// bump to the next row
index += 1;
}
SkASSERT(indexPtr - indices == indexCount);
}
// double-check that we have legal indices
#ifdef SK_DEBUG
{
for (int i = 0; i < indexCount; i++) {
SkASSERT((unsigned)indices[i] < (unsigned)ptCount);
}
}
#endif
auto image = bitmap.makeImage();
// cons-up a shader for the bitmap
Paint pnt;
if (paint) {
pnt = *paint;
}
SkSamplingOptions sampling(paintToFilter(&pnt));
pnt.setShader(image->makeShader(sampling));
auto v = builder.detach();
applyLooper(&pnt, [&](const SkPaint& p) {
SkPaint copy(p);
auto s = SkSamplingOptions(p.getFilterQuality());
if (s != sampling) {
// applyLooper changed the quality?
copy.setShader(image->makeShader(s));
}
mCanvas->drawVertices(v, SkBlendMode::kModulate, copy);
});
}
void SkiaCanvas::drawNinePatch(Bitmap& bitmap, const Res_png_9patch& chunk, float dstLeft,
float dstTop, float dstRight, float dstBottom,
const Paint* paint) {
SkCanvas::Lattice lattice;
NinePatchUtils::SetLatticeDivs(&lattice, chunk, bitmap.width(), bitmap.height());
lattice.fRectTypes = nullptr;
lattice.fColors = nullptr;
int numFlags = 0;
if (chunk.numColors > 0 && chunk.numColors == NinePatchUtils::NumDistinctRects(lattice)) {
// We can expect the framework to give us a color for every distinct rect.
// Skia requires a flag for every rect.
numFlags = (lattice.fXCount + 1) * (lattice.fYCount + 1);
}
SkAutoSTMalloc<25, SkCanvas::Lattice::RectType> flags(numFlags);
SkAutoSTMalloc<25, SkColor> colors(numFlags);
if (numFlags > 0) {
NinePatchUtils::SetLatticeFlags(&lattice, flags.get(), numFlags, chunk, colors.get());
}
lattice.fBounds = nullptr;
SkRect dst = SkRect::MakeLTRB(dstLeft, dstTop, dstRight, dstBottom);
auto image = bitmap.makeImage();
applyLooper(paint, [&](const SkPaint& p) {
auto filter = SkSamplingOptions(p.getFilterQuality()).filter;
mCanvas->drawImageLattice(image.get(), lattice, dst, filter, &p);
});
}
double SkiaCanvas::drawAnimatedImage(AnimatedImageDrawable* imgDrawable) {
return imgDrawable->drawStaging(mCanvas);
}
void SkiaCanvas::drawVectorDrawable(VectorDrawableRoot* vectorDrawable) {
vectorDrawable->drawStaging(this);
}
// ----------------------------------------------------------------------------
// Canvas draw operations: Text
// ----------------------------------------------------------------------------
void SkiaCanvas::drawGlyphs(ReadGlyphFunc glyphFunc, int count, const Paint& paint, float x,
float y, float totalAdvance) {
if (count <= 0 || paint.nothingToDraw()) return;
Paint paintCopy(paint);
if (mPaintFilter) {
mPaintFilter->filterFullPaint(&paintCopy);
}
const SkFont& font = paintCopy.getSkFont();
// Stroke with a hairline is drawn on HW with a fill style for compatibility with Android O and
// older.
if (!mCanvasOwned && sApiLevel <= 27 && paintCopy.getStrokeWidth() <= 0 &&
paintCopy.getStyle() == SkPaint::kStroke_Style) {
paintCopy.setStyle(SkPaint::kFill_Style);
}
SkTextBlobBuilder builder;
const SkTextBlobBuilder::RunBuffer& buffer = builder.allocRunPos(font, count);
glyphFunc(buffer.glyphs, buffer.pos);
sk_sp<SkTextBlob> textBlob(builder.make());
applyLooper(&paintCopy, [&](const SkPaint& p) { mCanvas->drawTextBlob(textBlob, 0, 0, p); });
drawTextDecorations(x, y, totalAdvance, paintCopy);
}
void SkiaCanvas::drawLayoutOnPath(const minikin::Layout& layout, float hOffset, float vOffset,
const Paint& paint, const SkPath& path, size_t start,
size_t end) {
Paint paintCopy(paint);
if (mPaintFilter) {
mPaintFilter->filterFullPaint(&paintCopy);
}
const SkFont& font = paintCopy.getSkFont();
const int N = end - start;
SkTextBlobBuilder builder;
auto rec = builder.allocRunRSXform(font, N);
SkRSXform* xform = (SkRSXform*)rec.pos;
uint16_t* glyphs = rec.glyphs;
SkPathMeasure meas(path, false);
for (size_t i = start; i < end; i++) {
glyphs[i - start] = layout.getGlyphId(i);
float halfWidth = layout.getCharAdvance(i) * 0.5f;
float x = hOffset + layout.getX(i) + halfWidth;
float y = vOffset + layout.getY(i);
SkPoint pos;
SkVector tan;
if (!meas.getPosTan(x, &pos, &tan)) {
pos.set(x, y);
tan.set(1, 0);
}
xform[i - start].fSCos = tan.x();
xform[i - start].fSSin = tan.y();
xform[i - start].fTx = pos.x() - tan.y() * y - halfWidth * tan.x();
xform[i - start].fTy = pos.y() + tan.x() * y - halfWidth * tan.y();
}
sk_sp<SkTextBlob> textBlob(builder.make());
applyLooper(&paintCopy, [&](const SkPaint& p) { mCanvas->drawTextBlob(textBlob, 0, 0, p); });
}
// ----------------------------------------------------------------------------
// Canvas draw operations: Animations
// ----------------------------------------------------------------------------
void SkiaCanvas::drawRoundRect(uirenderer::CanvasPropertyPrimitive* left,
uirenderer::CanvasPropertyPrimitive* top,
uirenderer::CanvasPropertyPrimitive* right,
uirenderer::CanvasPropertyPrimitive* bottom,
uirenderer::CanvasPropertyPrimitive* rx,
uirenderer::CanvasPropertyPrimitive* ry,
uirenderer::CanvasPropertyPaint* paint) {
sk_sp<uirenderer::skiapipeline::AnimatedRoundRect> drawable(
new uirenderer::skiapipeline::AnimatedRoundRect(left, top, right, bottom, rx, ry,
paint));
mCanvas->drawDrawable(drawable.get());
}
void SkiaCanvas::drawCircle(uirenderer::CanvasPropertyPrimitive* x,
uirenderer::CanvasPropertyPrimitive* y,
uirenderer::CanvasPropertyPrimitive* radius,
uirenderer::CanvasPropertyPaint* paint) {
sk_sp<uirenderer::skiapipeline::AnimatedCircle> drawable(
new uirenderer::skiapipeline::AnimatedCircle(x, y, radius, paint));
mCanvas->drawDrawable(drawable.get());
}
void SkiaCanvas::drawRipple(const uirenderer::skiapipeline::RippleDrawableParams& params) {
uirenderer::skiapipeline::AnimatedRippleDrawable::draw(mCanvas, params);
}
void SkiaCanvas::drawPicture(const SkPicture& picture) {
// TODO: Change to mCanvas->drawPicture()? SkCanvas::drawPicture seems to be
// where the logic is for playback vs. ref picture. Using picture.playback here
// to stay behavior-identical for now, but should revisit this at some point.
picture.playback(mCanvas);
}
// ----------------------------------------------------------------------------
// Canvas draw operations: View System
// ----------------------------------------------------------------------------
void SkiaCanvas::drawLayer(uirenderer::DeferredLayerUpdater* layerUpdater) {
LOG_ALWAYS_FATAL("SkiaCanvas can't directly draw Layers");
}
void SkiaCanvas::drawRenderNode(uirenderer::RenderNode* renderNode) {
LOG_ALWAYS_FATAL("SkiaCanvas can't directly draw RenderNodes");
}
} // namespace android
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