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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 <cutils/log.h>
#include <SkPatchUtils.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
SK_COMPILE_ASSERT(sizeof(SkPoint) == sizeof(float)*2, SkPoint_is_no_longer_2_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::onDrawPath(const SkPath& path, const SkPaint& paint) {
mCanvas->drawPath(path, paint);
}
void SkiaCanvasProxy::onDrawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top,
const SkPaint* paint) {
mCanvas->drawBitmap(bitmap, left, top, paint);
}
void SkiaCanvasProxy::onDrawBitmapRect(const SkBitmap& bitmap, const SkRect* srcPtr,
const SkRect& dst, const SkPaint* paint, DrawBitmapRectFlags) {
SkRect src = (srcPtr) ? *srcPtr : SkRect::MakeWH(bitmap.width(), bitmap.height());
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::onDrawSprite(const SkBitmap& bitmap, int left, int top,
const SkPaint* paint) {
mCanvas->save(SkCanvas::kMatrixClip_SaveFlag);
mCanvas->setMatrix(SkMatrix::I());
mCanvas->drawBitmap(bitmap, left, top, paint);
mCanvas->restore();
}
void SkiaCanvasProxy::onDrawVertices(VertexMode mode, int vertexCount, const SkPoint vertices[],
const SkPoint texs[], const SkColor colors[], SkXfermode*, const uint16_t indices[],
int indexCount, const SkPaint& paint) {
if (mFilterHwuiCalls) {
return;
}
// convert the SkPoints into floats
SK_COMPILE_ASSERT(sizeof(SkPoint) == sizeof(float)*2, SkPoint_is_no_longer_2_floats);
const int floatCount = vertexCount << 1;
const float* vArray = &vertices[0].fX;
const float* tArray = (texs) ? &texs[0].fX : NULL;
const int* cArray = (colors) ? (int*)colors : NULL;
mCanvas->drawVertices(mode, floatCount, vArray, tArray, cArray, indices, indexCount, paint);
}
SkSurface* SkiaCanvasProxy::onNewSurface(const SkImageInfo&, const SkSurfaceProps&) {
SkDEBUGFAIL("SkiaCanvasProxy::onNewSurface is not supported");
return NULL;
}
void SkiaCanvasProxy::willSave() {
mCanvas->save(SkCanvas::kMatrixClip_SaveFlag);
}
SkCanvas::SaveLayerStrategy SkiaCanvasProxy::willSaveLayer(const SkRect* rectPtr,
const SkPaint* paint, SaveFlags flags) {
SkRect rect;
if (rectPtr) {
rect = *rectPtr;
} else if(!mCanvas->getClipBounds(&rect)) {
rect = SkRect::MakeEmpty();
}
mCanvas->saveLayer(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, paint, flags);
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 {
storage.reset(byteLength); // ensures space for one glyph per ID given UTF8 encoding.
glyphIDs = storage.get();
count = paint.textToGlyphs(text, byteLength, storage.get());
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
}
}
SkPaint paint;
uint16_t* glyphIDs;
int count;
private:
SkAutoSTMalloc<32, 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
SkAutoSTMalloc<32, SkPoint> pointStorage(glyphs.count);
SkAutoSTMalloc<32, SkScalar> glyphWidths(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;
}
pointStorage[0].set(xBaseline, yBaseline);
// setup the remaining glyph positions
if (glyphs.paint.isVerticalText()) {
for (int i = 1; i < glyphs.count; i++) {
pointStorage[i].set(xBaseline, glyphWidths[i-1] + pointStorage[i-1].fY);
}
} else {
for (int i = 1; i < glyphs.count; i++) {
pointStorage[i].set(glyphWidths[i-1] + pointStorage[i-1].fX, yBaseline);
}
}
SK_COMPILE_ASSERT(sizeof(SkPoint) == sizeof(float)*2, SkPoint_is_no_longer_2_floats);
mCanvas->drawText(glyphs.glyphIDs, &pointStorage[0].fX, 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;
const SkPoint* posArray;
SkAutoSTMalloc<32, SkPoint> pointStorage;
if (mCanvas->drawTextAbsolutePos()) {
x = 0;
y = 0;
posArray = pos;
} else {
x = pos[0].fX;
y = pos[0].fY;
posArray = pointStorage.reset(glyphs.count);
for (int i = 0; i < glyphs.count; i++) {
pointStorage[i].fX = pos[i].fX- x;
pointStorage[i].fY = pos[i].fY- y;
}
}
// 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);
bounds.offset(x, y);
SK_COMPILE_ASSERT(sizeof(SkPoint) == sizeof(float)*2, SkPoint_is_no_longer_2_floats);
mCanvas->drawText(glyphs.glyphIDs, &posArray[0].fX, 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;
SkAutoSTMalloc<32, SkPoint> storage(pointCount);
SkPoint* pts = storage.get();
for (size_t i = 0; i < pointCount; i++) {
pts[i].set(xpos[i], constY);
}
this->onDrawPosText(text, byteLength, pts, paint);
}
void SkiaCanvasProxy::onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
const SkMatrix* matrix, const SkPaint& origPaint) {
// convert to glyphIDs if necessary
GlyphIDConverter glyphs(text, byteLength, origPaint);
mCanvas->drawTextOnPath(glyphs.glyphIDs, glyphs.count, path, 0, 0, glyphs.paint);
}
void SkiaCanvasProxy::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
const SkPaint& paint) {
SkDEBUGFAIL("SkiaCanvasProxy::onDrawTextBlob is not supported");
}
void SkiaCanvasProxy::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
const SkPoint texCoords[4], SkXfermode* xmode, const SkPaint& paint) {
if (mFilterHwuiCalls) {
return;
}
SkPatchUtils::VertexData data;
SkMatrix matrix;
mCanvas->getMatrix(&matrix);
SkISize lod = SkPatchUtils::GetLevelOfDetail(cubics, &matrix);
// It automatically adjusts lodX and lodY in case it exceeds the number of indices.
// If it fails to generate the vertices, then we do not draw.
if (SkPatchUtils::getVertexData(&data, cubics, colors, texCoords, lod.width(), lod.height())) {
this->drawVertices(SkCanvas::kTriangles_VertexMode, data.fVertexCount, data.fPoints,
data.fTexCoords, data.fColors, xmode, data.fIndices, data.fIndexCount,
paint);
}
}
void SkiaCanvasProxy::onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle) {
mCanvas->clipRect(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, op);
}
void SkiaCanvasProxy::onClipRRect(const SkRRect& roundRect, SkRegion::Op op, ClipEdgeStyle) {
SkPath path;
path.addRRect(roundRect);
mCanvas->clipPath(&path, op);
}
void SkiaCanvasProxy::onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle) {
mCanvas->clipPath(&path, op);
}
void SkiaCanvasProxy::onClipRegion(const SkRegion& region, SkRegion::Op op) {
mCanvas->clipRegion(&region, op);
}
}; // namespace uirenderer
}; // namespace android