void SkRRect::setNinePatch(const SkRect& rect, SkScalar leftRad, SkScalar topRad,
SkScalar rightRad, SkScalar bottomRad) {
fRect = rect;
fRect.sort();
if (fRect.isEmpty() || !fRect.isFinite()) {
this->setEmpty();
return;
}
const SkScalar array[4] = { leftRad, topRad, rightRad, bottomRad };
if (!SkScalarsAreFinite(array, 4)) {
this->setRect(rect); // devolve into a simple rect
return;
}
leftRad = SkMaxScalar(leftRad, 0);
topRad = SkMaxScalar(topRad, 0);
rightRad = SkMaxScalar(rightRad, 0);
bottomRad = SkMaxScalar(bottomRad, 0);
SkScalar scale = SK_Scalar1;
if (leftRad + rightRad > fRect.width()) {
scale = fRect.width() / (leftRad + rightRad);
}
if (topRad + bottomRad > fRect.height()) {
scale = SkMinScalar(scale, fRect.height() / (topRad + bottomRad));
}
if (scale < SK_Scalar1) {
leftRad = SkScalarMul(leftRad, scale);
topRad = SkScalarMul(topRad, scale);
rightRad = SkScalarMul(rightRad, scale);
bottomRad = SkScalarMul(bottomRad, scale);
}
if (leftRad == rightRad && topRad == bottomRad) {
if (leftRad >= SkScalarHalf(fRect.width()) && topRad >= SkScalarHalf(fRect.height())) {
fType = kOval_Type;
} else if (0 == leftRad || 0 == topRad) {
// If the left and (by equality check above) right radii are zero then it is a rect.
// Same goes for top/bottom.
fType = kRect_Type;
leftRad = 0;
topRad = 0;
rightRad = 0;
bottomRad = 0;
} else {
fType = kSimple_Type;
}
} else {
fType = kNinePatch_Type;
}
fRadii[kUpperLeft_Corner].set(leftRad, topRad);
fRadii[kUpperRight_Corner].set(rightRad, topRad);
fRadii[kLowerRight_Corner].set(rightRad, bottomRad);
fRadii[kLowerLeft_Corner].set(leftRad, bottomRad);
SkDEBUGCODE(this->validate();)
}
void generateGeometry(GrBatchTarget* batchTarget, const GrPipeline* pipeline) override {
int instanceCount = fGeoData.count();
SkMatrix invert;
if (this->usesLocalCoords() && !this->viewMatrix().invert(&invert)) {
SkDebugf("Could not invert viewmatrix\n");
return;
}
uint32_t flags = 0;
flags |= this->viewMatrix().isSimilarity() ? kSimilarity_DistanceFieldEffectFlag : 0;
GrTextureParams params(SkShader::kRepeat_TileMode, GrTextureParams::kBilerp_FilterMode);
// Setup GrGeometryProcessor
GrBatchAtlas* atlas = fAtlas;
SkAutoTUnref<GrGeometryProcessor> dfProcessor(
GrDistanceFieldPathGeoProc::Create(this->color(),
this->viewMatrix(),
atlas->getTexture(),
params,
flags,
false));
this->initDraw(batchTarget, dfProcessor, pipeline);
static const int kVertsPerQuad = 4;
static const int kIndicesPerQuad = 6;
SkAutoTUnref<const GrIndexBuffer> indexBuffer(
batchTarget->resourceProvider()->refQuadIndexBuffer());
// allocate vertices
size_t vertexStride = dfProcessor->getVertexStride();
SkASSERT(vertexStride == 2 * sizeof(SkPoint));
const GrVertexBuffer* vertexBuffer;
int vertexCount = kVertsPerQuad * instanceCount;
int firstVertex;
void* vertices = batchTarget->vertexPool()->makeSpace(vertexStride,
vertexCount,
&vertexBuffer,
&firstVertex);
if (!vertices || !indexBuffer) {
SkDebugf("Could not allocate vertices\n");
return;
}
// We may have to flush while uploading path data to the atlas, so we set up the draw here
int maxInstancesPerDraw = indexBuffer->maxQuads();
GrDrawTarget::DrawInfo drawInfo;
drawInfo.setPrimitiveType(kTriangles_GrPrimitiveType);
drawInfo.setStartVertex(0);
drawInfo.setStartIndex(0);
drawInfo.setVerticesPerInstance(kVertsPerQuad);
drawInfo.setIndicesPerInstance(kIndicesPerQuad);
drawInfo.adjustStartVertex(firstVertex);
drawInfo.setVertexBuffer(vertexBuffer);
drawInfo.setIndexBuffer(indexBuffer);
int instancesToFlush = 0;
for (int i = 0; i < instanceCount; i++) {
Geometry& args = fGeoData[i];
// get mip level
SkScalar maxScale = this->viewMatrix().getMaxScale();
const SkRect& bounds = args.fPath.getBounds();
SkScalar maxDim = SkMaxScalar(bounds.width(), bounds.height());
SkScalar size = maxScale * maxDim;
uint32_t desiredDimension;
if (size <= kSmallMIP) {
desiredDimension = kSmallMIP;
} else if (size <= kMediumMIP) {
desiredDimension = kMediumMIP;
} else {
desiredDimension = kLargeMIP;
}
// check to see if path is cached
// TODO: handle stroked vs. filled version of same path
PathData::Key key = { args.fPath.getGenerationID(), desiredDimension };
args.fPathData = fPathCache->find(key);
if (NULL == args.fPathData || !atlas->hasID(args.fPathData->fID)) {
// Remove the stale cache entry
if (args.fPathData) {
fPathCache->remove(args.fPathData->fKey);
fPathList->remove(args.fPathData);
SkDELETE(args.fPathData);
}
SkScalar scale = desiredDimension/maxDim;
args.fPathData = SkNEW(PathData);
if (!this->addPathToAtlas(batchTarget,
dfProcessor,
pipeline,
&drawInfo,
&instancesToFlush,
maxInstancesPerDraw,
atlas,
args.fPathData,
args.fPath,
args.fStroke,
args.fAntiAlias,
desiredDimension,
scale)) {
SkDebugf("Can't rasterize path\n");
return;
}
}
atlas->setLastUseToken(args.fPathData->fID, batchTarget->currentToken());
// Now set vertices
intptr_t offset = reinterpret_cast<intptr_t>(vertices);
offset += i * kVertsPerQuad * vertexStride;
SkPoint* positions = reinterpret_cast<SkPoint*>(offset);
this->drawPath(batchTarget,
atlas,
pipeline,
dfProcessor,
positions,
vertexStride,
this->viewMatrix(),
args.fPath,
args.fPathData);
instancesToFlush++;
}
this->flush(batchTarget, &drawInfo, instancesToFlush, maxInstancesPerDraw);
}
bool SkMagnifierImageFilter::onFilterImage(Proxy*, const SkBitmap& src,
const Context&, SkBitmap* dst,
SkIPoint* offset) const {
if ((src.colorType() != kN32_SkColorType) ||
(fSrcRect.width() >= src.width()) ||
(fSrcRect.height() >= src.height())) {
return false;
}
SkAutoLockPixels alp(src);
SkASSERT(src.getPixels());
if (!src.getPixels() || src.width() <= 0 || src.height() <= 0) {
return false;
}
if (!dst->tryAllocPixels(src.info())) {
return false;
}
SkScalar inv_inset = fInset > 0 ? SkScalarInvert(fInset) : SK_Scalar1;
SkScalar inv_x_zoom = fSrcRect.width() / src.width();
SkScalar inv_y_zoom = fSrcRect.height() / src.height();
SkColor* sptr = src.getAddr32(0, 0);
SkColor* dptr = dst->getAddr32(0, 0);
int width = src.width(), height = src.height();
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; ++x) {
SkScalar x_dist = SkMin32(x, width - x - 1) * inv_inset;
SkScalar y_dist = SkMin32(y, height - y - 1) * inv_inset;
SkScalar weight = 0;
static const SkScalar kScalar2 = SkScalar(2);
// To create a smooth curve at the corners, we need to work on
// a square twice the size of the inset.
if (x_dist < kScalar2 && y_dist < kScalar2) {
x_dist = kScalar2 - x_dist;
y_dist = kScalar2 - y_dist;
SkScalar dist = SkScalarSqrt(SkScalarSquare(x_dist) +
SkScalarSquare(y_dist));
dist = SkMaxScalar(kScalar2 - dist, 0);
weight = SkMinScalar(SkScalarSquare(dist), SK_Scalar1);
} else {
SkScalar sqDist = SkMinScalar(SkScalarSquare(x_dist),
SkScalarSquare(y_dist));
weight = SkMinScalar(sqDist, SK_Scalar1);
}
SkScalar x_interp = SkScalarMul(weight, (fSrcRect.x() + x * inv_x_zoom)) +
(SK_Scalar1 - weight) * x;
SkScalar y_interp = SkScalarMul(weight, (fSrcRect.y() + y * inv_y_zoom)) +
(SK_Scalar1 - weight) * y;
int x_val = SkPin32(SkScalarFloorToInt(x_interp), 0, width - 1);
int y_val = SkPin32(SkScalarFloorToInt(y_interp), 0, height - 1);
*dptr = sptr[y_val * width + x_val];
dptr++;
}
}
return true;
}
void onPrepareDraws(Target* target) const override {
int instanceCount = fGeoData.count();
SkMatrix invert;
if (this->usesLocalCoords() && !this->viewMatrix().invert(&invert)) {
SkDebugf("Could not invert viewmatrix\n");
return;
}
const SkMatrix& ctm = this->viewMatrix();
uint32_t flags = 0;
flags |= ctm.isScaleTranslate() ? kScaleOnly_DistanceFieldEffectFlag : 0;
flags |= ctm.isSimilarity() ? kSimilarity_DistanceFieldEffectFlag : 0;
flags |= fGammaCorrect ? kGammaCorrect_DistanceFieldEffectFlag : 0;
GrTextureParams params(SkShader::kRepeat_TileMode, GrTextureParams::kBilerp_FilterMode);
FlushInfo flushInfo;
// Setup GrGeometryProcessor
GrBatchAtlas* atlas = fAtlas;
flushInfo.fGeometryProcessor = GrDistanceFieldPathGeoProc::Make(this->color(),
this->viewMatrix(),
atlas->getTexture(),
params,
flags,
this->usesLocalCoords());
// allocate vertices
size_t vertexStride = flushInfo.fGeometryProcessor->getVertexStride();
SkASSERT(vertexStride == 2 * sizeof(SkPoint) + sizeof(GrColor));
const GrBuffer* vertexBuffer;
void* vertices = target->makeVertexSpace(vertexStride,
kVerticesPerQuad * instanceCount,
&vertexBuffer,
&flushInfo.fVertexOffset);
flushInfo.fVertexBuffer.reset(SkRef(vertexBuffer));
flushInfo.fIndexBuffer.reset(target->resourceProvider()->refQuadIndexBuffer());
if (!vertices || !flushInfo.fIndexBuffer) {
SkDebugf("Could not allocate vertices\n");
return;
}
flushInfo.fInstancesToFlush = 0;
// Pointer to the next set of vertices to write.
intptr_t offset = reinterpret_cast<intptr_t>(vertices);
for (int i = 0; i < instanceCount; i++) {
const Geometry& args = fGeoData[i];
// get mip level
SkScalar maxScale = this->viewMatrix().getMaxScale();
const SkRect& bounds = args.fShape.bounds();
SkScalar maxDim = SkMaxScalar(bounds.width(), bounds.height());
SkScalar size = maxScale * maxDim;
uint32_t desiredDimension;
if (size <= kSmallMIP) {
desiredDimension = kSmallMIP;
} else if (size <= kMediumMIP) {
desiredDimension = kMediumMIP;
} else {
desiredDimension = kLargeMIP;
}
// check to see if path is cached
ShapeData::Key key(args.fShape, desiredDimension);
ShapeData* shapeData = fShapeCache->find(key);
if (nullptr == shapeData || !atlas->hasID(shapeData->fID)) {
// Remove the stale cache entry
if (shapeData) {
fShapeCache->remove(shapeData->fKey);
fShapeList->remove(shapeData);
delete shapeData;
}
SkScalar scale = desiredDimension/maxDim;
shapeData = new ShapeData;
if (!this->addPathToAtlas(target,
&flushInfo,
atlas,
shapeData,
args.fShape,
args.fAntiAlias,
desiredDimension,
scale)) {
delete shapeData;
SkDebugf("Can't rasterize path\n");
continue;
}
}
atlas->setLastUseToken(shapeData->fID, target->nextDrawToken());
this->writePathVertices(target,
atlas,
offset,
args.fColor,
vertexStride,
this->viewMatrix(),
shapeData);
offset += kVerticesPerQuad * vertexStride;
flushInfo.fInstancesToFlush++;
}
this->flush(target, &flushInfo);
}
void SkDisplayMath::executeFunction(SkDisplayable* target, int index,
SkTDArray<SkScriptValue>& parameters, SkDisplayTypes type,
SkScriptValue* scriptValue) {
if (scriptValue == NULL)
return;
SkASSERT(target == this);
SkScriptValue* array = parameters.begin();
SkScriptValue* end = parameters.end();
SkScalar input = parameters[0].fOperand.fScalar;
SkScalar scalarResult;
switch (index) {
case SK_FUNCTION(abs):
scalarResult = SkScalarAbs(input);
break;
case SK_FUNCTION(acos):
scalarResult = SkScalarACos(input);
break;
case SK_FUNCTION(asin):
scalarResult = SkScalarASin(input);
break;
case SK_FUNCTION(atan):
scalarResult = SkScalarATan2(input, SK_Scalar1);
break;
case SK_FUNCTION(atan2):
scalarResult = SkScalarATan2(input, parameters[1].fOperand.fScalar);
break;
case SK_FUNCTION(ceil):
scalarResult = SkIntToScalar(SkScalarCeil(input));
break;
case SK_FUNCTION(cos):
scalarResult = SkScalarCos(input);
break;
case SK_FUNCTION(exp):
scalarResult = SkScalarExp(input);
break;
case SK_FUNCTION(floor):
scalarResult = SkIntToScalar(SkScalarFloor(input));
break;
case SK_FUNCTION(log):
scalarResult = SkScalarLog(input);
break;
case SK_FUNCTION(max):
scalarResult = -SK_ScalarMax;
while (array < end) {
scalarResult = SkMaxScalar(scalarResult, array->fOperand.fScalar);
array++;
}
break;
case SK_FUNCTION(min):
scalarResult = SK_ScalarMax;
while (array < end) {
scalarResult = SkMinScalar(scalarResult, array->fOperand.fScalar);
array++;
}
break;
case SK_FUNCTION(pow):
// not the greatest -- but use x^y = e^(y * ln(x))
scalarResult = SkScalarLog(input);
scalarResult = SkScalarMul(parameters[1].fOperand.fScalar, scalarResult);
scalarResult = SkScalarExp(scalarResult);
break;
case SK_FUNCTION(random):
scalarResult = fRandom.nextUScalar1();
break;
case SK_FUNCTION(round):
scalarResult = SkIntToScalar(SkScalarRound(input));
break;
case SK_FUNCTION(sin):
scalarResult = SkScalarSin(input);
break;
case SK_FUNCTION(sqrt): {
SkASSERT(parameters.count() == 1);
SkASSERT(type == SkType_Float);
scalarResult = SkScalarSqrt(input);
} break;
case SK_FUNCTION(tan):
scalarResult = SkScalarTan(input);
break;
default:
SkASSERT(0);
scalarResult = SK_ScalarNaN;
}
scriptValue->fOperand.fScalar = scalarResult;
scriptValue->fType = SkType_Float;
}
void onDraw(SkCanvas* canvas) override {
static const char kText[] = "SKIA";
static const int kTextLen = SK_ARRAY_COUNT(kText) - 1;
static const int kPointSize = 55;
SkTDArray<LabeledMatrix> matrices;
matrices.append()->fMatrix.reset();
matrices.top().fLabel = "Identity";
matrices.append()->fMatrix.setScale(1.2f, 0.8f);
matrices.top().fLabel = "Scale";
matrices.append()->fMatrix.setRotate(10.f);
matrices.top().fLabel = "Rotate";
matrices.append()->fMatrix.reset();
matrices.top().fMatrix.setPerspX(-0.0015f);
matrices.top().fMatrix.setPerspY(+0.0015f);
matrices.top().fLabel = "Persp";
SkTDArray<LabeledMatrix> localMatrices;
localMatrices.append()->fMatrix.reset();
localMatrices.top().fLabel = "Identity";
localMatrices.append()->fMatrix.setScale(2.5f, 0.2f);
localMatrices.top().fLabel = "Scale";
localMatrices.append()->fMatrix.setRotate(45.f);
localMatrices.top().fLabel = "Rotate";
localMatrices.append()->fMatrix.reset();
localMatrices.top().fMatrix.setPerspX(-0.007f);
localMatrices.top().fMatrix.setPerspY(+0.008f);
localMatrices.top().fLabel = "Persp";
static SkBitmap bmp;
if (bmp.isNull()) {
makebm(&bmp, kPointSize / 2, kPointSize / 2);
}
SkPaint fillPaint;
fillPaint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface_always(&fillPaint);
fillPaint.setTextSize(SkIntToScalar(kPointSize));
fillPaint.setFilterQuality(kLow_SkFilterQuality);
SkPaint outlinePaint;
outlinePaint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface_always(&outlinePaint);
outlinePaint.setTextSize(SkIntToScalar(kPointSize));
outlinePaint.setStyle(SkPaint::kStroke_Style);
outlinePaint.setStrokeWidth(0.f);
SkScalar w = fillPaint.measureText(kText, kTextLen);
static SkScalar kPadY = 0.5f * kPointSize;
static SkScalar kPadX = 1.5f * kPointSize;
SkPaint strokePaint(fillPaint);
strokePaint.setStyle(SkPaint::kStroke_Style);
strokePaint.setStrokeWidth(kPointSize * 0.1f);
SkPaint labelPaint;
labelPaint.setColor(0xff000000);
labelPaint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface_always(&labelPaint);
labelPaint.setTextSize(12.f);
canvas->translate(15.f, 15.f);
canvas->drawBitmap(bmp, 0, 0);
canvas->translate(0, bmp.height() + labelPaint.getTextSize() + 15.f);
static const char kLabelLabel[] = "localM / canvasM";
canvas->drawText(kLabelLabel, strlen(kLabelLabel), 0, 0, labelPaint);
canvas->translate(0, 15.f);
canvas->save();
SkScalar maxLabelW = 0;
canvas->translate(0, kPadY / 2 + kPointSize);
for (int lm = 0; lm < localMatrices.count(); ++lm) {
canvas->drawText(matrices[lm].fLabel, strlen(matrices[lm].fLabel),
0, labelPaint.getTextSize() - 1, labelPaint);
SkScalar labelW = labelPaint.measureText(matrices[lm].fLabel,
strlen(matrices[lm].fLabel));
maxLabelW = SkMaxScalar(maxLabelW, labelW);
canvas->translate(0.f, 2 * kPointSize + 2.5f * kPadY);
}
canvas->restore();
canvas->translate(maxLabelW + kPadX / 2.f, 0.f);
for (int s = 0; s < 2; ++s) {
SkPaint& paint = s ? strokePaint : fillPaint;
SkScalar columnH = 0;
for (int m = 0; m < matrices.count(); ++m) {
columnH = 0;
canvas->save();
canvas->drawText(matrices[m].fLabel, strlen(matrices[m].fLabel),
0, labelPaint.getTextSize() - 1, labelPaint);
canvas->translate(0, kPadY / 2 + kPointSize);
columnH += kPadY / 2 + kPointSize;
for (int lm = 0; lm < localMatrices.count(); ++lm) {
paint.setShader(
SkShader::CreateBitmapShader(bmp,
SkShader::kMirror_TileMode,
SkShader::kRepeat_TileMode,
&localMatrices[lm].fMatrix))->unref();
canvas->save();
canvas->concat(matrices[m].fMatrix);
canvas->drawText(kText, kTextLen, 0, 0, paint);
canvas->drawText(kText, kTextLen, 0, 0, outlinePaint);
canvas->restore();
SkPath path;
path.arcTo(SkRect::MakeXYWH(-0.1f * w, 0.f,
1.2f * w, 2.f * kPointSize),
225.f, 359.f,
false);
path.close();
canvas->translate(0.f, kPointSize + kPadY);
columnH += kPointSize + kPadY;
canvas->save();
canvas->concat(matrices[m].fMatrix);
canvas->drawTextOnPath(kText, kTextLen, path, NULL, paint);
canvas->drawTextOnPath(kText, kTextLen, path, NULL, outlinePaint);
canvas->restore();
SkPaint stroke;
stroke.setStyle(SkPaint::kStroke_Style);
canvas->translate(0.f, kPointSize + kPadY);
columnH += kPointSize + kPadY;
}
canvas->restore();
canvas->translate(w + kPadX, 0.f);
}
if (0 == s) {
canvas->drawLine(0.f, -kPadY, 0.f, columnH + kPadY, outlinePaint);
canvas->translate(kPadX / 2, 0.f);
static const char kFillLabel[] = "Filled";
static const char kStrokeLabel[] = "Stroked";
SkScalar y = columnH + kPadY / 2;
SkScalar fillX = -outlinePaint.measureText(kFillLabel, strlen(kFillLabel)) - kPadX;
SkScalar strokeX = kPadX;
canvas->drawText(kFillLabel, strlen(kFillLabel), fillX, y, labelPaint);
canvas->drawText(kStrokeLabel, strlen(kStrokeLabel), strokeX, y, labelPaint);
}
}
}
void onPrepareDraws(Target* target) override {
int instanceCount = fGeoData.count();
SkMatrix invert;
if (this->usesLocalCoords() && !this->viewMatrix().invert(&invert)) {
SkDebugf("Could not invert viewmatrix\n");
return;
}
uint32_t flags = 0;
flags |= this->viewMatrix().isSimilarity() ? kSimilarity_DistanceFieldEffectFlag : 0;
GrTextureParams params(SkShader::kRepeat_TileMode, GrTextureParams::kBilerp_FilterMode);
// Setup GrGeometryProcessor
GrBatchAtlas* atlas = fAtlas;
SkAutoTUnref<GrGeometryProcessor> dfProcessor(
GrDistanceFieldPathGeoProc::Create(this->color(),
this->viewMatrix(),
atlas->getTexture(),
params,
flags,
this->usesLocalCoords()));
target->initDraw(dfProcessor, this->pipeline());
FlushInfo flushInfo;
// allocate vertices
size_t vertexStride = dfProcessor->getVertexStride();
SkASSERT(vertexStride == 2 * sizeof(SkPoint));
const GrVertexBuffer* vertexBuffer;
void* vertices = target->makeVertexSpace(vertexStride,
kVerticesPerQuad * instanceCount,
&vertexBuffer,
&flushInfo.fVertexOffset);
flushInfo.fVertexBuffer.reset(SkRef(vertexBuffer));
flushInfo.fIndexBuffer.reset(target->resourceProvider()->refQuadIndexBuffer());
if (!vertices || !flushInfo.fIndexBuffer) {
SkDebugf("Could not allocate vertices\n");
return;
}
flushInfo.fInstancesToFlush = 0;
for (int i = 0; i < instanceCount; i++) {
Geometry& args = fGeoData[i];
// get mip level
SkScalar maxScale = this->viewMatrix().getMaxScale();
const SkRect& bounds = args.fPath.getBounds();
SkScalar maxDim = SkMaxScalar(bounds.width(), bounds.height());
SkScalar size = maxScale * maxDim;
uint32_t desiredDimension;
if (size <= kSmallMIP) {
desiredDimension = kSmallMIP;
} else if (size <= kMediumMIP) {
desiredDimension = kMediumMIP;
} else {
desiredDimension = kLargeMIP;
}
// check to see if path is cached
// TODO: handle stroked vs. filled version of same path
PathData::Key key = { args.fPath.getGenerationID(), desiredDimension };
args.fPathData = fPathCache->find(key);
if (NULL == args.fPathData || !atlas->hasID(args.fPathData->fID)) {
// Remove the stale cache entry
if (args.fPathData) {
fPathCache->remove(args.fPathData->fKey);
fPathList->remove(args.fPathData);
SkDELETE(args.fPathData);
}
SkScalar scale = desiredDimension/maxDim;
args.fPathData = SkNEW(PathData);
if (!this->addPathToAtlas(target,
dfProcessor,
this->pipeline(),
&flushInfo,
atlas,
args.fPathData,
args.fPath,
args.fStroke,
args.fAntiAlias,
desiredDimension,
scale)) {
SkDebugf("Can't rasterize path\n");
return;
}
}
atlas->setLastUseToken(args.fPathData->fID, target->currentToken());
// Now set vertices
intptr_t offset = reinterpret_cast<intptr_t>(vertices);
offset += i * kVerticesPerQuad * vertexStride;
SkPoint* positions = reinterpret_cast<SkPoint*>(offset);
this->writePathVertices(target,
atlas,
this->pipeline(),
dfProcessor,
positions,
vertexStride,
this->viewMatrix(),
args.fPath,
args.fPathData);
flushInfo.fInstancesToFlush++;
}
this->flush(target, &flushInfo);
}
// Add children
void add(sk_sp<Control> control) override {
SkASSERT(!fParent); // Validity of parent's relativeY and fHeight depends on immutability
fControls.push_back(control);
control->setParent(this, SkPoint::Make(0.0f, kSelectorHeight));
fHeight = SkMaxScalar(fHeight, control->height()); // Setting height to max child height.
}
bool SkXRayCrossesMonotonicCubic(const SkXRay& pt, const SkPoint cubic[4]) {
// Find the minimum and maximum y of the extrema, which are the
// first and last points since this cubic is monotonic
SkScalar min_y = SkMinScalar(cubic[0].fY, cubic[3].fY);
SkScalar max_y = SkMaxScalar(cubic[0].fY, cubic[3].fY);
if (pt.fY == cubic[0].fY
|| pt.fY < min_y
|| pt.fY > max_y) {
// The query line definitely does not cross the curve
return false;
}
SkScalar min_x =
SkMinScalar(
SkMinScalar(
SkMinScalar(cubic[0].fX, cubic[1].fX),
cubic[2].fX),
cubic[3].fX);
if (pt.fX < min_x) {
// The query line definitely crosses the curve
return true;
}
SkScalar max_x =
SkMaxScalar(
SkMaxScalar(
SkMaxScalar(cubic[0].fX, cubic[1].fX),
cubic[2].fX),
cubic[3].fX);
if (pt.fX > max_x) {
// The query line definitely does not cross the curve
return false;
}
// Do a binary search to find the parameter value which makes y as
// close as possible to the query point. See whether the query
// line's origin is to the left of the associated x coordinate.
// kMaxIter is chosen as the number of mantissa bits for a float,
// since there's no way we are going to get more precision by
// iterating more times than that.
const int kMaxIter = 23;
SkPoint eval;
int iter = 0;
SkScalar upper_t;
SkScalar lower_t;
// Need to invert direction of t parameter if cubic goes up
// instead of down
if (cubic[3].fY > cubic[0].fY) {
upper_t = SK_Scalar1;
lower_t = SkFloatToScalar(0);
} else {
upper_t = SkFloatToScalar(0);
lower_t = SK_Scalar1;
}
do {
SkScalar t = SkScalarAve(upper_t, lower_t);
SkEvalCubicAt(cubic, t, &eval, NULL, NULL);
if (pt.fY > eval.fY) {
lower_t = t;
} else {
upper_t = t;
}
} while (++iter < kMaxIter
&& !SkScalarNearlyZero(eval.fY - pt.fY));
if (pt.fX <= eval.fX) {
return true;
}
return false;
}
sk_sp<SkSpecialImage> SkMagnifierImageFilter::onFilterImage(SkSpecialImage* source,
const Context& ctx,
SkIPoint* offset) const {
SkIPoint inputOffset = SkIPoint::Make(0, 0);
sk_sp<SkSpecialImage> input(this->filterInput(0, source, ctx, &inputOffset));
if (!input) {
return nullptr;
}
const SkIRect inputBounds = SkIRect::MakeXYWH(inputOffset.x(), inputOffset.y(),
input->width(), input->height());
SkIRect bounds;
if (!this->applyCropRect(ctx, inputBounds, &bounds)) {
return nullptr;
}
SkScalar invInset = fInset > 0 ? SkScalarInvert(fInset) : SK_Scalar1;
SkScalar invXZoom = fSrcRect.width() / bounds.width();
SkScalar invYZoom = fSrcRect.height() / bounds.height();
#if SK_SUPPORT_GPU
if (source->isTextureBacked()) {
GrContext* context = source->getContext();
sk_sp<GrTexture> inputTexture(input->asTextureRef(context));
SkASSERT(inputTexture);
offset->fX = bounds.left();
offset->fY = bounds.top();
bounds.offset(-inputOffset);
SkScalar yOffset = inputTexture->origin() == kTopLeft_GrSurfaceOrigin
? fSrcRect.y()
: inputTexture->height() -
fSrcRect.height() * inputTexture->height() / bounds.height() - fSrcRect.y();
int boundsY = inputTexture->origin() == kTopLeft_GrSurfaceOrigin
? bounds.y()
: inputTexture->height() - bounds.height();
SkRect effectBounds = SkRect::MakeXYWH(
SkIntToScalar(bounds.x()) / inputTexture->width(),
SkIntToScalar(boundsY) / inputTexture->height(),
SkIntToScalar(inputTexture->width()) / bounds.width(),
SkIntToScalar(inputTexture->height()) / bounds.height());
// SRGBTODO: Handle sRGB here
sk_sp<GrFragmentProcessor> fp(GrMagnifierEffect::Create(
inputTexture.get(),
effectBounds,
fSrcRect.x() / inputTexture->width(),
yOffset / inputTexture->height(),
invXZoom,
invYZoom,
bounds.width() * invInset,
bounds.height() * invInset));
if (!fp) {
return nullptr;
}
return DrawWithFP(context, std::move(fp), bounds);
}
#endif
SkBitmap inputBM;
if (!input->getROPixels(&inputBM)) {
return nullptr;
}
if ((inputBM.colorType() != kN32_SkColorType) ||
(fSrcRect.width() >= inputBM.width()) || (fSrcRect.height() >= inputBM.height())) {
return nullptr;
}
SkAutoLockPixels alp(inputBM);
SkASSERT(inputBM.getPixels());
if (!inputBM.getPixels() || inputBM.width() <= 0 || inputBM.height() <= 0) {
return nullptr;
}
const SkImageInfo info = SkImageInfo::MakeN32Premul(bounds.width(), bounds.height());
SkBitmap dst;
if (!dst.tryAllocPixels(info)) {
return nullptr;
}
SkAutoLockPixels dstLock(dst);
SkColor* dptr = dst.getAddr32(0, 0);
int dstWidth = dst.width(), dstHeight = dst.height();
for (int y = 0; y < dstHeight; ++y) {
for (int x = 0; x < dstWidth; ++x) {
SkScalar x_dist = SkMin32(x, dstWidth - x - 1) * invInset;
SkScalar y_dist = SkMin32(y, dstHeight - y - 1) * invInset;
SkScalar weight = 0;
static const SkScalar kScalar2 = SkScalar(2);
// To create a smooth curve at the corners, we need to work on
// a square twice the size of the inset.
if (x_dist < kScalar2 && y_dist < kScalar2) {
x_dist = kScalar2 - x_dist;
y_dist = kScalar2 - y_dist;
SkScalar dist = SkScalarSqrt(SkScalarSquare(x_dist) +
SkScalarSquare(y_dist));
dist = SkMaxScalar(kScalar2 - dist, 0);
weight = SkMinScalar(SkScalarSquare(dist), SK_Scalar1);
} else {
SkScalar sqDist = SkMinScalar(SkScalarSquare(x_dist),
SkScalarSquare(y_dist));
weight = SkMinScalar(sqDist, SK_Scalar1);
}
SkScalar x_interp = SkScalarMul(weight, (fSrcRect.x() + x * invXZoom)) +
(SK_Scalar1 - weight) * x;
SkScalar y_interp = SkScalarMul(weight, (fSrcRect.y() + y * invYZoom)) +
(SK_Scalar1 - weight) * y;
int x_val = SkTPin(bounds.x() + SkScalarFloorToInt(x_interp), 0, inputBM.width() - 1);
int y_val = SkTPin(bounds.y() + SkScalarFloorToInt(y_interp), 0, inputBM.height() - 1);
*dptr = *inputBM.getAddr32(x_val, y_val);
dptr++;
}
}
offset->fX = bounds.left();
offset->fY = bounds.top();
return SkSpecialImage::MakeFromRaster(SkIRect::MakeWH(bounds.width(), bounds.height()),
dst);
}
static bool cheap_dist_exceeds_limit(const SkPoint& pt,
SkScalar x, SkScalar y) {
SkScalar dist = SkMaxScalar(SkScalarAbs(x - pt.fX), SkScalarAbs(y - pt.fY));
// just made up the 1/2
return dist > CHEAP_DIST_LIMIT;
}
bool GrDashingEffect::DrawDashLine(const SkPoint pts[2], const GrPaint& paint,
const GrStrokeInfo& strokeInfo, GrGpu* gpu,
GrDrawTarget* target, const SkMatrix& vm) {
if (!can_fast_path_dash(pts, strokeInfo, *target, vm)) {
return false;
}
const SkPathEffect::DashInfo& info = strokeInfo.getDashInfo();
SkPaint::Cap cap = strokeInfo.getStrokeRec().getCap();
SkScalar srcStrokeWidth = strokeInfo.getStrokeRec().getWidth();
// the phase should be normalized to be [0, sum of all intervals)
SkASSERT(info.fPhase >= 0 && info.fPhase < info.fIntervals[0] + info.fIntervals[1]);
SkScalar srcPhase = info.fPhase;
// Rotate the src pts so they are aligned horizontally with pts[0].fX < pts[1].fX
SkMatrix srcRotInv;
SkPoint ptsRot[2];
if (pts[0].fY != pts[1].fY || pts[0].fX > pts[1].fX) {
SkMatrix rotMatrix;
align_to_x_axis(pts, &rotMatrix, ptsRot);
if(!rotMatrix.invert(&srcRotInv)) {
GrPrintf("Failed to create invertible rotation matrix!\n");
return false;
}
} else {
srcRotInv.reset();
memcpy(ptsRot, pts, 2 * sizeof(SkPoint));
}
bool useAA = paint.isAntiAlias();
// Scale corrections of intervals and stroke from view matrix
SkScalar parallelScale;
SkScalar perpScale;
calc_dash_scaling(¶llelScale, &perpScale, vm, ptsRot);
bool hasCap = SkPaint::kButt_Cap != cap && 0 != srcStrokeWidth;
// We always want to at least stroke out half a pixel on each side in device space
// so 0.5f / perpScale gives us this min in src space
SkScalar halfSrcStroke = SkMaxScalar(srcStrokeWidth * 0.5f, 0.5f / perpScale);
SkScalar strokeAdj;
if (!hasCap) {
strokeAdj = 0.f;
} else {
strokeAdj = halfSrcStroke;
}
SkScalar startAdj = 0;
SkMatrix combinedMatrix = srcRotInv;
combinedMatrix.postConcat(vm);
bool lineDone = false;
SkRect startRect;
bool hasStartRect = false;
// If we are using AA, check to see if we are drawing a partial dash at the start. If so
// draw it separately here and adjust our start point accordingly
if (useAA) {
if (srcPhase > 0 && srcPhase < info.fIntervals[0]) {
SkPoint startPts[2];
startPts[0] = ptsRot[0];
startPts[1].fY = startPts[0].fY;
startPts[1].fX = SkMinScalar(startPts[0].fX + info.fIntervals[0] - srcPhase,
ptsRot[1].fX);
startRect.set(startPts, 2);
startRect.outset(strokeAdj, halfSrcStroke);
hasStartRect = true;
startAdj = info.fIntervals[0] + info.fIntervals[1] - srcPhase;
}
}
// adjustments for start and end of bounding rect so we only draw dash intervals
// contained in the original line segment.
startAdj += calc_start_adjustment(info);
if (startAdj != 0) {
ptsRot[0].fX += startAdj;
srcPhase = 0;
}
SkScalar endingInterval = 0;
SkScalar endAdj = calc_end_adjustment(info, ptsRot, srcPhase, &endingInterval);
ptsRot[1].fX -= endAdj;
if (ptsRot[0].fX >= ptsRot[1].fX) {
lineDone = true;
}
SkRect endRect;
bool hasEndRect = false;
// If we are using AA, check to see if we are drawing a partial dash at then end. If so
// draw it separately here and adjust our end point accordingly
if (useAA && !lineDone) {
// If we adjusted the end then we will not be drawing a partial dash at the end.
// If we didn't adjust the end point then we just need to make sure the ending
// dash isn't a full dash
if (0 == endAdj && endingInterval != info.fIntervals[0]) {
SkPoint endPts[2];
endPts[1] = ptsRot[1];
endPts[0].fY = endPts[1].fY;
endPts[0].fX = endPts[1].fX - endingInterval;
endRect.set(endPts, 2);
endRect.outset(strokeAdj, halfSrcStroke);
hasEndRect = true;
endAdj = endingInterval + info.fIntervals[1];
ptsRot[1].fX -= endAdj;
if (ptsRot[0].fX >= ptsRot[1].fX) {
lineDone = true;
}
}
}
if (startAdj != 0) {
srcPhase = 0;
}
// Change the dashing info from src space into device space
SkScalar devIntervals[2];
devIntervals[0] = info.fIntervals[0] * parallelScale;
devIntervals[1] = info.fIntervals[1] * parallelScale;
SkScalar devPhase = srcPhase * parallelScale;
SkScalar strokeWidth = srcStrokeWidth * perpScale;
if ((strokeWidth < 1.f && !useAA) || 0.f == strokeWidth) {
strokeWidth = 1.f;
}
SkScalar halfDevStroke = strokeWidth * 0.5f;
if (SkPaint::kSquare_Cap == cap && 0 != srcStrokeWidth) {
// add cap to on interveal and remove from off interval
devIntervals[0] += strokeWidth;
devIntervals[1] -= strokeWidth;
}
SkScalar startOffset = devIntervals[1] * 0.5f + devPhase;
SkScalar bloatX = useAA ? 0.5f / parallelScale : 0.f;
SkScalar bloatY = useAA ? 0.5f / perpScale : 0.f;
SkScalar devBloat = useAA ? 0.5f : 0.f;
GrDrawState* drawState = target->drawState();
if (devIntervals[1] <= 0.f && useAA) {
// Case when we end up drawing a solid AA rect
// Reset the start rect to draw this single solid rect
// but it requires to upload a new intervals uniform so we can mimic
// one giant dash
ptsRot[0].fX -= hasStartRect ? startAdj : 0;
ptsRot[1].fX += hasEndRect ? endAdj : 0;
startRect.set(ptsRot, 2);
startRect.outset(strokeAdj, halfSrcStroke);
hasStartRect = true;
hasEndRect = false;
lineDone = true;
SkPoint devicePts[2];
vm.mapPoints(devicePts, ptsRot, 2);
SkScalar lineLength = SkPoint::Distance(devicePts[0], devicePts[1]);
if (hasCap) {
lineLength += 2.f * halfDevStroke;
}
devIntervals[0] = lineLength;
}
if (devIntervals[1] > 0.f || useAA) {
SkPathEffect::DashInfo devInfo;
devInfo.fPhase = devPhase;
devInfo.fCount = 2;
devInfo.fIntervals = devIntervals;
GrEffectEdgeType edgeType= useAA ? kFillAA_GrEffectEdgeType :
kFillBW_GrEffectEdgeType;
bool isRoundCap = SkPaint::kRound_Cap == cap;
GrDashingEffect::DashCap capType = isRoundCap ? GrDashingEffect::kRound_DashCap :
GrDashingEffect::kNonRound_DashCap;
drawState->addCoverageEffect(
GrDashingEffect::Create(edgeType, devInfo, strokeWidth, capType), 1)->unref();
}
// Set up the vertex data for the line and start/end dashes
drawState->setVertexAttribs<gDashLineVertexAttribs>(SK_ARRAY_COUNT(gDashLineVertexAttribs));
int totalRectCnt = 0;
totalRectCnt += !lineDone ? 1 : 0;
totalRectCnt += hasStartRect ? 1 : 0;
totalRectCnt += hasEndRect ? 1 : 0;
GrDrawTarget::AutoReleaseGeometry geo(target, totalRectCnt * 4, 0);
if (!geo.succeeded()) {
GrPrintf("Failed to get space for vertices!\n");
return false;
}
DashLineVertex* verts = reinterpret_cast<DashLineVertex*>(geo.vertices());
int curVIdx = 0;
if (SkPaint::kRound_Cap == cap && 0 != srcStrokeWidth) {
// need to adjust this for round caps to correctly set the dashPos attrib on vertices
startOffset -= halfDevStroke;
}
// Draw interior part of dashed line
if (!lineDone) {
SkPoint devicePts[2];
vm.mapPoints(devicePts, ptsRot, 2);
SkScalar lineLength = SkPoint::Distance(devicePts[0], devicePts[1]);
if (hasCap) {
lineLength += 2.f * halfDevStroke;
}
SkRect bounds;
bounds.set(ptsRot[0].fX, ptsRot[0].fY, ptsRot[1].fX, ptsRot[1].fY);
bounds.outset(bloatX + strokeAdj, bloatY + halfSrcStroke);
setup_dashed_rect(bounds, verts, curVIdx, combinedMatrix, startOffset, devBloat,
lineLength, halfDevStroke);
curVIdx += 4;
}
if (hasStartRect) {
SkASSERT(useAA); // so that we know bloatX and bloatY have been set
startRect.outset(bloatX, bloatY);
setup_dashed_rect(startRect, verts, curVIdx, combinedMatrix, startOffset, devBloat,
devIntervals[0], halfDevStroke);
curVIdx += 4;
}
if (hasEndRect) {
SkASSERT(useAA); // so that we know bloatX and bloatY have been set
endRect.outset(bloatX, bloatY);
setup_dashed_rect(endRect, verts, curVIdx, combinedMatrix, startOffset, devBloat,
devIntervals[0], halfDevStroke);
}
target->setIndexSourceToBuffer(gpu->getContext()->getQuadIndexBuffer());
target->drawIndexedInstances(kTriangles_GrPrimitiveType, totalRectCnt, 4, 6);
target->resetIndexSource();
return true;
}
static sk_sp<SkImage> makebm(SkCanvas* origCanvas, SkBitmap* resultBM, int w, int h) {
SkImageInfo info = SkImageInfo::MakeN32Premul(w, h);
SkAutoTUnref<SkSurface> surface(origCanvas->newSurface(info));
if (nullptr == surface) {
// picture canvas will return null, so fall-back to raster
surface.reset(SkSurface::NewRaster(info));
}
SkCanvas* canvas = surface->getCanvas();
canvas->clear(SK_ColorTRANSPARENT);
SkScalar wScalar = SkIntToScalar(w);
SkScalar hScalar = SkIntToScalar(h);
SkPoint pt = { wScalar / 2, hScalar / 2 };
SkScalar radius = 4 * SkMaxScalar(wScalar, hScalar);
SkColor colors[] = { SK_ColorRED, SK_ColorYELLOW,
SK_ColorGREEN, SK_ColorMAGENTA,
SK_ColorBLUE, SK_ColorCYAN,
SK_ColorRED};
SkScalar pos[] = {0,
SK_Scalar1 / 6,
2 * SK_Scalar1 / 6,
3 * SK_Scalar1 / 6,
4 * SK_Scalar1 / 6,
5 * SK_Scalar1 / 6,
SK_Scalar1};
SkPaint paint;
SkRect rect = SkRect::MakeWH(wScalar, hScalar);
SkMatrix mat = SkMatrix::I();
for (int i = 0; i < 4; ++i) {
paint.setShader(SkGradientShader::MakeRadial(
pt, radius,
colors, pos,
SK_ARRAY_COUNT(colors),
SkShader::kRepeat_TileMode,
0, &mat));
canvas->drawRect(rect, paint);
rect.inset(wScalar / 8, hScalar / 8);
mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4);
}
auto image = surface->makeImageSnapshot();
SkBitmap tempBM;
#if SK_SUPPORT_GPU
if (GrTexture* texture = as_IB(image)->peekTexture()) {
GrWrapTextureInBitmap(texture, image->width(), image->height(), image->isOpaque(), &tempBM);
} else
#endif
{
image->asLegacyBitmap(&tempBM, SkImage::kRO_LegacyBitmapMode);
}
// Let backends know we won't change this, so they don't have to deep copy it defensively.
tempBM.setImmutable();
*resultBM = tempBM;
return image;
}
SkScalerContext_FreeType::SkScalerContext_FreeType(const SkDescriptor* desc)
: SkScalerContext(desc) {
SkAutoMutexAcquire ac(gFTMutex);
if (gFTCount == 0) {
if (!InitFreetype()) {
sk_throw();
}
}
++gFTCount;
// load the font file
fFTSize = NULL;
fFace = NULL;
fFaceRec = ref_ft_face(fRec.fFontID);
if (NULL == fFaceRec) {
return;
}
fFace = fFaceRec->fFace;
// compute our factors from the record
SkMatrix m;
fRec.getSingleMatrix(&m);
#ifdef DUMP_STRIKE_CREATION
SkString keyString;
SkFontHost::GetDescriptorKeyString(desc, &keyString);
printf("========== strike [%g %g %g] [%g %g %g %g] hints %d format %d %s\n", SkScalarToFloat(fRec.fTextSize),
SkScalarToFloat(fRec.fPreScaleX), SkScalarToFloat(fRec.fPreSkewX),
SkScalarToFloat(fRec.fPost2x2[0][0]), SkScalarToFloat(fRec.fPost2x2[0][1]),
SkScalarToFloat(fRec.fPost2x2[1][0]), SkScalarToFloat(fRec.fPost2x2[1][1]),
fRec.getHinting(), fRec.fMaskFormat, keyString.c_str());
#endif
// now compute our scale factors
SkScalar sx = m.getScaleX();
SkScalar sy = m.getScaleY();
if (m.getSkewX() || m.getSkewY() || sx < 0 || sy < 0) {
// sort of give up on hinting
sx = SkMaxScalar(SkScalarAbs(sx), SkScalarAbs(m.getSkewX()));
sy = SkMaxScalar(SkScalarAbs(m.getSkewY()), SkScalarAbs(sy));
sx = sy = SkScalarAve(sx, sy);
SkScalar inv = SkScalarInvert(sx);
// flip the skew elements to go from our Y-down system to FreeType's
fMatrix22.xx = SkScalarToFixed(SkScalarMul(m.getScaleX(), inv));
fMatrix22.xy = -SkScalarToFixed(SkScalarMul(m.getSkewX(), inv));
fMatrix22.yx = -SkScalarToFixed(SkScalarMul(m.getSkewY(), inv));
fMatrix22.yy = SkScalarToFixed(SkScalarMul(m.getScaleY(), inv));
} else {
fMatrix22.xx = fMatrix22.yy = SK_Fixed1;
fMatrix22.xy = fMatrix22.yx = 0;
}
fScaleX = SkScalarToFixed(sx);
fScaleY = SkScalarToFixed(sy);
// compute the flags we send to Load_Glyph
{
FT_Int32 loadFlags = FT_LOAD_DEFAULT;
if (SkMask::kBW_Format == fRec.fMaskFormat) {
// See http://code.google.com/p/chromium/issues/detail?id=43252#c24
loadFlags = FT_LOAD_TARGET_MONO;
if (fRec.getHinting() == SkPaint::kNo_Hinting)
loadFlags = FT_LOAD_NO_HINTING;
} else {
switch (fRec.getHinting()) {
case SkPaint::kNo_Hinting:
loadFlags = FT_LOAD_NO_HINTING;
break;
case SkPaint::kSlight_Hinting:
loadFlags = FT_LOAD_TARGET_LIGHT; // This implies FORCE_AUTOHINT
break;
case SkPaint::kNormal_Hinting:
loadFlags = FT_LOAD_TARGET_NORMAL;
break;
case SkPaint::kFull_Hinting:
loadFlags = FT_LOAD_TARGET_NORMAL;
if (SkMask::kHorizontalLCD_Format == fRec.fMaskFormat)
loadFlags = FT_LOAD_TARGET_LCD;
else if (SkMask::kVerticalLCD_Format == fRec.fMaskFormat)
loadFlags = FT_LOAD_TARGET_LCD_V;
break;
default:
SkDebugf("---------- UNKNOWN hinting %d\n", fRec.getHinting());
break;
}
}
if ((fRec.fFlags & SkScalerContext::kEmbeddedBitmapText_Flag) == 0)
loadFlags |= FT_LOAD_NO_BITMAP;
fLoadGlyphFlags = loadFlags;
}
// now create the FT_Size
{
FT_Error err;
err = FT_New_Size(fFace, &fFTSize);
if (err != 0) {
SkDEBUGF(("SkScalerContext_FreeType::FT_New_Size(%x): FT_Set_Char_Size(0x%x, 0x%x) returned 0x%x\n",
fFaceRec->fFontID, fScaleX, fScaleY, err));
fFace = NULL;
return;
}
err = FT_Activate_Size(fFTSize);
if (err != 0) {
SkDEBUGF(("SkScalerContext_FreeType::FT_Activate_Size(%x, 0x%x, 0x%x) returned 0x%x\n",
fFaceRec->fFontID, fScaleX, fScaleY, err));
fFTSize = NULL;
}
err = FT_Set_Char_Size( fFace,
SkFixedToFDot6(fScaleX), SkFixedToFDot6(fScaleY),
72, 72);
if (err != 0) {
SkDEBUGF(("SkScalerContext_FreeType::FT_Set_Char_Size(%x, 0x%x, 0x%x) returned 0x%x\n",
fFaceRec->fFontID, fScaleX, fScaleY, err));
fFace = NULL;
return;
}
FT_Set_Transform( fFace, &fMatrix22, NULL);
}
}
SkScalerContext_FreeType::SkScalerContext_FreeType(const SkDescriptor* desc)
: SkScalerContext(desc), fFTSize(NULL) {
SkAutoMutexAcquire ac(gFTMutex);
FT_Error err;
if (gFTCount == 0) {
err = FT_Init_FreeType(&gFTLibrary);
// SkDEBUGF(("FT_Init_FreeType returned %d\n", err));
SkASSERT(err == 0);
}
++gFTCount;
// load the font file
fFaceRec = ref_ft_face(fRec.fFontID);
fFace = fFaceRec ? fFaceRec->fFace : NULL;
// compute our factors from the record
SkMatrix m;
fRec.getSingleMatrix(&m);
#ifdef DUMP_STRIKE_CREATION
SkString keyString;
SkFontHost::GetDescriptorKeyString(desc, &keyString);
printf("========== strike [%g %g %g] [%g %g %g %g] hints %d format %d %s\n", SkScalarToFloat(fRec.fTextSize),
SkScalarToFloat(fRec.fPreScaleX), SkScalarToFloat(fRec.fPreSkewX),
SkScalarToFloat(fRec.fPost2x2[0][0]), SkScalarToFloat(fRec.fPost2x2[0][1]),
SkScalarToFloat(fRec.fPost2x2[1][0]), SkScalarToFloat(fRec.fPost2x2[1][1]),
fRec.fHints, fRec.fMaskFormat, keyString.c_str());
#endif
// now compute our scale factors
SkScalar sx = m.getScaleX();
SkScalar sy = m.getScaleY();
if (m.getSkewX() || m.getSkewY() || sx < 0 || sy < 0) {
// sort of give up on hinting
sx = SkMaxScalar(SkScalarAbs(sx), SkScalarAbs(m.getSkewX()));
sy = SkMaxScalar(SkScalarAbs(m.getSkewY()), SkScalarAbs(sy));
sx = sy = SkScalarAve(sx, sy);
SkScalar inv = SkScalarInvert(sx);
// flip the skew elements to go from our Y-down system to FreeType's
fMatrix22.xx = SkScalarToFixed(SkScalarMul(m.getScaleX(), inv));
fMatrix22.xy = -SkScalarToFixed(SkScalarMul(m.getSkewX(), inv));
fMatrix22.yx = -SkScalarToFixed(SkScalarMul(m.getSkewY(), inv));
fMatrix22.yy = SkScalarToFixed(SkScalarMul(m.getScaleY(), inv));
} else {
fMatrix22.xx = fMatrix22.yy = SK_Fixed1;
fMatrix22.xy = fMatrix22.yx = 0;
}
fScaleX = SkScalarToFixed(sx);
fScaleY = SkScalarToFixed(sy);
// compute the flags we send to Load_Glyph
{
uint32_t flags = FT_LOAD_DEFAULT;
uint32_t render_flags = FT_LOAD_TARGET_NORMAL;
// we force autohinting at the moment
switch (fRec.fHints) {
case kNo_Hints:
flags |= FT_LOAD_NO_HINTING;
break;
case kSubpixel_Hints:
flags |= FT_LOAD_FORCE_AUTOHINT;
render_flags = FT_LOAD_TARGET_LIGHT;
break;
case kNormal_Hints:
flags |= FT_LOAD_FORCE_AUTOHINT;
#ifdef ANDROID
/* Switch to light hinting (vertical only) to address some chars
that behaved poorly with NORMAL. In the future we could consider
making this choice exposed at runtime to the caller.
*/
render_flags = FT_LOAD_TARGET_LIGHT;
#endif
break;
}
if (SkMask::kBW_Format == fRec.fMaskFormat)
render_flags = FT_LOAD_TARGET_MONO;
else if (SkMask::kLCD_Format == fRec.fMaskFormat)
render_flags = FT_LOAD_TARGET_LCD;
fLoadGlyphFlags = flags | render_flags;
}
// now create the FT_Size
{
FT_Error err;
err = FT_New_Size(fFace, &fFTSize);
if (err != 0) {
SkDEBUGF(("SkScalerContext_FreeType::FT_New_Size(%x): FT_Set_Char_Size(0x%x, 0x%x) returned 0x%x\n",
fFaceRec->fFontID, fScaleX, fScaleY, err));
fFace = NULL;
return;
}
err = FT_Activate_Size(fFTSize);
if (err != 0) {
SkDEBUGF(("SkScalerContext_FreeType::FT_Activate_Size(%x, 0x%x, 0x%x) returned 0x%x\n",
fFaceRec->fFontID, fScaleX, fScaleY, err));
fFTSize = NULL;
}
err = FT_Set_Char_Size( fFace,
SkFixedToFDot6(fScaleX), SkFixedToFDot6(fScaleY),
72, 72);
if (err != 0) {
SkDEBUGF(("SkScalerContext_FreeType::FT_Set_Char_Size(%x, 0x%x, 0x%x) returned 0x%x\n",
fFaceRec->fFontID, fScaleX, fScaleY, err));
fFace = NULL;
return;
}
FT_Set_Transform( fFace, &fMatrix22, NULL);
}
}
bool SkPathMeasure::cheap_dist_exceeds_limit(const SkPoint& pt,
SkScalar x, SkScalar y) {
SkScalar dist = SkMaxScalar(SkScalarAbs(x - pt.fX), SkScalarAbs(y - pt.fY));
// just made up the 1/2
return dist > fTolerance;
}
