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/*
* Copyright (C) 2015 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 "SkiaCanvasProxy.h"
#include <memory>
#include <log/log.h>
#include "hwui/Bitmap.h"
#include <SkLatticeIter.h>
#include <SkPatchUtils.h>
#include <SkPaint.h>
#include <SkPath.h>
#include <SkPixelRef.h>
#include <SkRect.h>
#include <SkRRect.h>
#include <SkRSXform.h>
#include <SkSurface.h>
#include <SkTextBlobRunIterator.h>
#include <SkVertices.h>
namespace android {
namespace uirenderer {
SkiaCanvasProxy::SkiaCanvasProxy(Canvas* canvas, bool filterHwuiCalls)
: INHERITED(canvas->width(), canvas->height())
, mCanvas(canvas)
, mFilterHwuiCalls(filterHwuiCalls) {}
void SkiaCanvasProxy::onDrawPaint(const SkPaint& paint) {
mCanvas->drawPaint(paint);
}
void SkiaCanvasProxy::onDrawPoints(PointMode pointMode, size_t count, const SkPoint pts[],
const SkPaint& paint) {
if (!pts || count == 0) {
return;
}
// convert the SkPoints into floats
static_assert(sizeof(SkPoint) == sizeof(float)*2, "SkPoint is no longer two floats");
const size_t floatCount = count << 1;
const float* floatArray = &pts[0].fX;
switch (pointMode) {
case kPoints_PointMode: {
mCanvas->drawPoints(floatArray, floatCount, paint);
break;
}
case kLines_PointMode: {
mCanvas->drawLines(floatArray, floatCount, paint);
break;
}
case kPolygon_PointMode: {
SkPaint strokedPaint(paint);
strokedPaint.setStyle(SkPaint::kStroke_Style);
SkPath path;
for (size_t i = 0; i < count - 1; i++) {
path.moveTo(pts[i]);
path.lineTo(pts[i+1]);
this->drawPath(path, strokedPaint);
path.rewind();
}
break;
}
default:
LOG_ALWAYS_FATAL("Unknown point type");
}
}
void SkiaCanvasProxy::onDrawOval(const SkRect& rect, const SkPaint& paint) {
mCanvas->drawOval(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, paint);
}
void SkiaCanvasProxy::onDrawRect(const SkRect& rect, const SkPaint& paint) {
mCanvas->drawRect(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, paint);
}
void SkiaCanvasProxy::onDrawRRect(const SkRRect& roundRect, const SkPaint& paint) {
if (!roundRect.isComplex()) {
const SkRect& rect = roundRect.rect();
SkVector radii = roundRect.getSimpleRadii();
mCanvas->drawRoundRect(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom,
radii.fX, radii.fY, paint);
} else {
SkPath path;
path.addRRect(roundRect);
mCanvas->drawPath(path, paint);
}
}
void SkiaCanvasProxy::onDrawArc(const SkRect& rect, SkScalar startAngle, SkScalar sweepAngle,
bool useCenter, const SkPaint& paint) {
mCanvas->drawArc(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom,
startAngle, sweepAngle, useCenter, paint);
}
void SkiaCanvasProxy::onDrawPath(const SkPath& path, const SkPaint& paint) {
mCanvas->drawPath(path, paint);
}
void SkiaCanvasProxy::onDrawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top,
const SkPaint* paint) {
sk_sp<Bitmap> hwuiBitmap = Bitmap::createFrom(bitmap.info(), *bitmap.pixelRef());
// HWUI doesn't support extractSubset(), so convert any subsetted bitmap into
// a drawBitmapRect(); pass through an un-subsetted bitmap.
if (hwuiBitmap && bitmap.dimensions() != hwuiBitmap->info().dimensions()) {
SkIPoint origin = bitmap.pixelRefOrigin();
mCanvas->drawBitmap(*hwuiBitmap, origin.fX, origin.fY,
origin.fX + bitmap.dimensions().width(),
origin.fY + bitmap.dimensions().height(),
left, top,
left + bitmap.dimensions().width(),
top + bitmap.dimensions().height(),
paint);
} else {
mCanvas->drawBitmap(*hwuiBitmap, left, top, paint);
}
}
void SkiaCanvasProxy::onDrawBitmapRect(const SkBitmap& skBitmap, const SkRect* srcPtr,
const SkRect& dst, const SkPaint* paint, SrcRectConstraint) {
SkRect src = (srcPtr) ? *srcPtr : SkRect::MakeWH(skBitmap.width(), skBitmap.height());
// TODO: if bitmap is a subset, do we need to add pixelRefOrigin to src?
Bitmap* bitmap = reinterpret_cast<Bitmap*>(skBitmap.pixelRef());
mCanvas->drawBitmap(*bitmap, src.fLeft, src.fTop, src.fRight, src.fBottom,
dst.fLeft, dst.fTop, dst.fRight, dst.fBottom, paint);
}
void SkiaCanvasProxy::onDrawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
const SkRect& dst, const SkPaint*) {
//TODO make nine-patch drawing a method on Canvas.h
SkDEBUGFAIL("SkiaCanvasProxy::onDrawBitmapNine is not yet supported");
}
void SkiaCanvasProxy::onDrawImage(const SkImage* image, SkScalar left, SkScalar top,
const SkPaint* paint) {
SkBitmap skiaBitmap;
if (image->asLegacyBitmap(&skiaBitmap, SkImage::kRO_LegacyBitmapMode)) {
onDrawBitmap(skiaBitmap, left, top, paint);
}
}
void SkiaCanvasProxy::onDrawImageRect(const SkImage* image, const SkRect* srcPtr, const SkRect& dst,
const SkPaint* paint, SrcRectConstraint constraint) {
SkBitmap skiaBitmap;
if (image->asLegacyBitmap(&skiaBitmap, SkImage::kRO_LegacyBitmapMode)) {
sk_sp<Bitmap> bitmap = Bitmap::createFrom(skiaBitmap.info(), *skiaBitmap.pixelRef());
SkRect src = (srcPtr) ? *srcPtr : SkRect::MakeWH(image->width(), image->height());
mCanvas->drawBitmap(*bitmap, src.fLeft, src.fTop, src.fRight, src.fBottom,
dst.fLeft, dst.fTop, dst.fRight, dst.fBottom, paint);
}
}
void SkiaCanvasProxy::onDrawImageNine(const SkImage*, const SkIRect& center, const SkRect& dst,
const SkPaint*) {
SkDEBUGFAIL("SkiaCanvasProxy::onDrawImageNine is not yet supported");
}
void SkiaCanvasProxy::onDrawImageLattice(const SkImage* image, const Lattice& lattice,
const SkRect& dst, const SkPaint* paint) {
SkLatticeIter iter(lattice, dst);
SkRect srcR, dstR;
while (iter.next(&srcR, &dstR)) {
onDrawImageRect(image, &srcR, dstR, paint, SkCanvas::kStrict_SrcRectConstraint);
}
}
void SkiaCanvasProxy::onDrawVerticesObject(const SkVertices* vertices, SkBlendMode bmode,
const SkPaint& paint) {
if (mFilterHwuiCalls) {
return;
}
mCanvas->drawVertices(vertices, bmode, paint);
}
sk_sp<SkSurface> SkiaCanvasProxy::onNewSurface(const SkImageInfo&, const SkSurfaceProps&) {
SkDEBUGFAIL("SkiaCanvasProxy::onNewSurface is not supported");
return NULL;
}
void SkiaCanvasProxy::willSave() {
mCanvas->save(android::SaveFlags::MatrixClip);
}
static inline SaveFlags::Flags saveFlags(SkCanvas::SaveLayerFlags layerFlags) {
SaveFlags::Flags saveFlags = 0;
if (!(layerFlags & SkCanvas::kDontClipToLayer_Legacy_SaveLayerFlag)) {
saveFlags |= SaveFlags::ClipToLayer;
}
if (!(layerFlags & SkCanvas::kIsOpaque_SaveLayerFlag)) {
saveFlags |= SaveFlags::HasAlphaLayer;
}
return saveFlags;
}
SkCanvas::SaveLayerStrategy SkiaCanvasProxy::getSaveLayerStrategy(const SaveLayerRec& saveLayerRec) {
SkRect rect;
if (saveLayerRec.fBounds) {
rect = *saveLayerRec.fBounds;
} else if (!mCanvas->getClipBounds(&rect)) {
rect = SkRect::MakeEmpty();
}
mCanvas->saveLayer(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, saveLayerRec.fPaint,
saveFlags(saveLayerRec.fSaveLayerFlags));
return SkCanvas::kNoLayer_SaveLayerStrategy;
}
void SkiaCanvasProxy::willRestore() {
mCanvas->restore();
}
void SkiaCanvasProxy::didConcat(const SkMatrix& matrix) {
mCanvas->concat(matrix);
}
void SkiaCanvasProxy::didSetMatrix(const SkMatrix& matrix) {
mCanvas->setMatrix(matrix);
}
void SkiaCanvasProxy::onDrawDRRect(const SkRRect& outer, const SkRRect& inner,
const SkPaint& paint) {
SkPath path;
path.addRRect(outer);
path.addRRect(inner);
path.setFillType(SkPath::kEvenOdd_FillType);
this->drawPath(path, paint);
}
/**
* Utility class that converts the incoming text & paint from the given encoding
* into glyphIDs.
*/
class GlyphIDConverter {
public:
GlyphIDConverter(const void* text, size_t byteLength, const SkPaint& origPaint) {
paint = origPaint;
if (paint.getTextEncoding() == SkPaint::kGlyphID_TextEncoding) {
glyphIDs = (uint16_t*)text;
count = byteLength >> 1;
} else {
// ensure space for one glyph per ID given UTF8 encoding.
storage.reset(new uint16_t[byteLength]);
glyphIDs = storage.get();
count = paint.textToGlyphs(text, byteLength, storage.get());
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
}
}
SkPaint paint;
uint16_t* glyphIDs;
int count;
private:
std::unique_ptr<uint16_t[]> storage;
};
void SkiaCanvasProxy::onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
const SkPaint& origPaint) {
// convert to glyphIDs if necessary
GlyphIDConverter glyphs(text, byteLength, origPaint);
// compute the glyph positions
std::unique_ptr<SkScalar[]> glyphWidths(new SkScalar[glyphs.count]);
glyphs.paint.getTextWidths(glyphs.glyphIDs, glyphs.count << 1, glyphWidths.get());
// compute conservative bounds
// NOTE: We could call the faster paint.getFontBounds for a less accurate,
// but even more conservative bounds if this is too slow.
SkRect bounds;
glyphs.paint.measureText(glyphs.glyphIDs, glyphs.count << 1, &bounds);
// adjust for non-left alignment
if (glyphs.paint.getTextAlign() != SkPaint::kLeft_Align) {
SkScalar stop = 0;
for (int i = 0; i < glyphs.count; i++) {
stop += glyphWidths[i];
}
if (glyphs.paint.getTextAlign() == SkPaint::kCenter_Align) {
stop = SkScalarHalf(stop);
}
if (glyphs.paint.isVerticalText()) {
y -= stop;
} else {
x -= stop;
}
}
// setup the first glyph position and adjust bounds if needed
int xBaseline = 0;
int yBaseline = 0;
if (mCanvas->drawTextAbsolutePos()) {
bounds.offset(x,y);
xBaseline = x;
yBaseline = y;
}
static_assert(sizeof(SkPoint) == sizeof(float)*2, "SkPoint is no longer two floats");
auto glyphFunc = [&] (uint16_t* text, float* positions) {
memcpy(text, glyphs.glyphIDs, glyphs.count*sizeof(uint16_t));
size_t posIndex = 0;
// setup the first glyph position
positions[posIndex++] = xBaseline;
positions[posIndex++] = yBaseline;
// setup the remaining glyph positions
if (glyphs.paint.isVerticalText()) {
float yPosition = yBaseline;
for (int i = 1; i < glyphs.count; i++) {
positions[posIndex++] = xBaseline;
yPosition += glyphWidths[i-1];
positions[posIndex++] = yPosition;
}
} else {
float xPosition = xBaseline;
for (int i = 1; i < glyphs.count; i++) {
xPosition += glyphWidths[i-1];
positions[posIndex++] = xPosition;
positions[posIndex++] = yBaseline;
}
}
};
mCanvas->drawGlyphs(glyphFunc, glyphs.count, glyphs.paint, x, y, bounds.fLeft, bounds.fTop,
bounds.fRight, bounds.fBottom, 0);
}
void SkiaCanvasProxy::onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
const SkPaint& origPaint) {
// convert to glyphIDs if necessary
GlyphIDConverter glyphs(text, byteLength, origPaint);
// convert to relative positions if necessary
int x, y;
if (mCanvas->drawTextAbsolutePos()) {
x = 0;
y = 0;
} else {
x = pos[0].fX;
y = pos[0].fY;
}
// Compute conservative bounds. If the content has already been processed
// by Minikin then it had already computed these bounds. Unfortunately,
// there is no way to capture those bounds as part of the Skia drawPosText
// API so we need to do that computation again here.
SkRect bounds = SkRect::MakeEmpty();
for (int i = 0; i < glyphs.count; i++) {
SkRect glyphBounds = SkRect::MakeEmpty();
glyphs.paint.measureText(&glyphs.glyphIDs[i], sizeof(uint16_t), &glyphBounds);
glyphBounds.offset(pos[i].fX, pos[i].fY);
bounds.join(glyphBounds);
}
static_assert(sizeof(SkPoint) == sizeof(float)*2, "SkPoint is no longer two floats");
auto glyphFunc = [&] (uint16_t* text, float* positions) {
memcpy(text, glyphs.glyphIDs, glyphs.count*sizeof(uint16_t));
if (mCanvas->drawTextAbsolutePos()) {
memcpy(positions, pos, 2*glyphs.count*sizeof(float));
} else {
for (int i = 0, posIndex = 0; i < glyphs.count; i++) {
positions[posIndex++] = pos[i].fX - x;
positions[posIndex++] = pos[i].fY - y;
}
}
};
mCanvas->drawGlyphs(glyphFunc, glyphs.count, glyphs.paint, x, y, bounds.fLeft, bounds.fTop,
bounds.fRight, bounds.fBottom, 0);
}
void SkiaCanvasProxy::onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
SkScalar constY, const SkPaint& paint) {
const size_t pointCount = byteLength >> 1;
std::unique_ptr<SkPoint[]> pts(new SkPoint[pointCount]);
for (size_t i = 0; i < pointCount; i++) {
pts[i].set(xpos[i], constY);
}
this->onDrawPosText(text, byteLength, pts.get(), paint);
}
void SkiaCanvasProxy::onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
const SkMatrix* matrix, const SkPaint& origPaint) {
SkDEBUGFAIL("SkiaCanvasProxy::onDrawTextOnPath is not supported");
}
void SkiaCanvasProxy::onDrawTextRSXform(const void* text, size_t byteLength,
const SkRSXform xform[], const SkRect* cullRect, const SkPaint& paint) {
GlyphIDConverter glyphs(text, byteLength, paint); // Just get count
SkMatrix localM, currM, origM;
mCanvas->getMatrix(&currM);
origM = currM;
for (int i = 0; i < glyphs.count; i++) {
localM.setRSXform(*xform++);
currM.setConcat(origM, localM);
mCanvas->setMatrix(currM);
this->onDrawText((char*)text + (byteLength / glyphs.count * i),
byteLength / glyphs.count, 0, 0, paint);
}
mCanvas->setMatrix(origM);
}
void SkiaCanvasProxy::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
const SkPaint& paint) {
SkPaint runPaint = paint;
SkTextBlobRunIterator it(blob);
for (;!it.done(); it.next()) {
size_t textLen = it.glyphCount() * sizeof(uint16_t);
const SkPoint& offset = it.offset();
// applyFontToPaint() always overwrites the exact same attributes,
// so it is safe to not re-seed the paint for this reason.
it.applyFontToPaint(&runPaint);
switch (it.positioning()) {
case SkTextBlob::kDefault_Positioning:
this->drawText(it.glyphs(), textLen, x + offset.x(), y + offset.y(), runPaint);
break;
case SkTextBlob::kHorizontal_Positioning: {
std::unique_ptr<SkPoint[]> pts(new SkPoint[it.glyphCount()]);
for (size_t i = 0; i < it.glyphCount(); i++) {
pts[i].set(x + offset.x() + it.pos()[i], y + offset.y());
}
this->drawPosText(it.glyphs(), textLen, pts.get(), runPaint);
break;
}
case SkTextBlob::kFull_Positioning: {
std::unique_ptr<SkPoint[]> pts(new SkPoint[it.glyphCount()]);
for (size_t i = 0; i < it.glyphCount(); i++) {
const size_t xIndex = i*2;
const size_t yIndex = xIndex + 1;
pts[i].set(x + offset.x() + it.pos()[xIndex], y + offset.y() + it.pos()[yIndex]);
}
this->drawPosText(it.glyphs(), textLen, pts.get(), runPaint);
break;
}
default:
SkFAIL("unhandled positioning mode");
}
}
}
void SkiaCanvasProxy::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
const SkPoint texCoords[4], SkBlendMode bmode, const SkPaint& paint) {
if (mFilterHwuiCalls) {
return;
}
SkMatrix matrix;
mCanvas->getMatrix(&matrix);
SkISize lod = SkPatchUtils::GetLevelOfDetail(cubics, &matrix);
mCanvas->drawVertices(SkPatchUtils::MakeVertices(cubics, colors, texCoords,
lod.width(), lod.height()).get(),
bmode, paint);
}
void SkiaCanvasProxy::onClipRect(const SkRect& rect, SkClipOp op, ClipEdgeStyle) {
mCanvas->clipRect(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, op);
}
void SkiaCanvasProxy::onClipRRect(const SkRRect& roundRect, SkClipOp op, ClipEdgeStyle) {
SkPath path;
path.addRRect(roundRect);
mCanvas->clipPath(&path, op);
}
void SkiaCanvasProxy::onClipPath(const SkPath& path, SkClipOp op, ClipEdgeStyle) {
mCanvas->clipPath(&path, op);
}
}; // namespace uirenderer
}; // namespace android