bool GrDistanceFieldTextContext::canDraw(const SkPaint& paint, const SkMatrix& viewMatrix) {
// TODO: support perspective (need getMaxScale replacement)
if (viewMatrix.hasPerspective()) {
return false;
}
SkScalar maxScale = viewMatrix.getMaxScale();
SkScalar scaledTextSize = maxScale*paint.getTextSize();
// Scaling up beyond 2x yields undesireable artifacts
if (scaledTextSize > 2*kLargeDFFontSize) {
return false;
}
if (!fEnableDFRendering && !paint.isDistanceFieldTextTEMP() &&
scaledTextSize < kLargeDFFontSize) {
return false;
}
// rasterizers and mask filters modify alpha, which doesn't
// translate well to distance
if (paint.getRasterizer() || paint.getMaskFilter() ||
!fContext->getTextTarget()->caps()->shaderDerivativeSupport()) {
return false;
}
// TODO: add some stroking support
if (paint.getStyle() != SkPaint::kFill_Style) {
return false;
}
return true;
}
SkStrokeRec::SkStrokeRec(const SkPaint& paint) {
switch (paint.getStyle()) {
case SkPaint::kFill_Style:
fWidth = kStrokeRec_FillStyleWidth;
fStrokeAndFill = false;
break;
case SkPaint::kStroke_Style:
fWidth = paint.getStrokeWidth();
fStrokeAndFill = false;
break;
case SkPaint::kStrokeAndFill_Style:
if (0 == paint.getStrokeWidth()) {
// hairline+fill == fill
fWidth = kStrokeRec_FillStyleWidth;
fStrokeAndFill = false;
} else {
fWidth = paint.getStrokeWidth();
fStrokeAndFill = true;
}
break;
default:
SkASSERT(!"unknown paint style");
// fall back on just fill
fWidth = kStrokeRec_FillStyleWidth;
fStrokeAndFill = false;
break;
}
// copy these from the paint, regardless of our "style"
fMiterLimit = paint.getStrokeMiter();
fCap = paint.getStrokeCap();
fJoin = paint.getStrokeJoin();
}
SkStroke::SkStroke(const SkPaint& p, SkScalar width) {
fWidth = width;
fMiterLimit = p.getStrokeMiter();
fCap = (uint8_t)p.getStrokeCap();
fJoin = (uint8_t)p.getStrokeJoin();
fDoFill = SkToU8(p.getStyle() == SkPaint::kStrokeAndFill_Style);
}
bool GrStencilAndCoverTextContext::canDraw(const GrRenderTarget* rt,
const GrClip& clip,
const GrPaint& paint,
const SkPaint& skPaint,
const SkMatrix& viewMatrix) {
if (skPaint.getRasterizer()) {
return false;
}
if (skPaint.getMaskFilter()) {
return false;
}
if (SkPathEffect* pe = skPaint.getPathEffect()) {
if (pe->asADash(NULL) != SkPathEffect::kDash_DashType) {
return false;
}
}
// No hairlines unless we can map the 1 px width to the object space.
if (skPaint.getStyle() == SkPaint::kStroke_Style
&& skPaint.getStrokeWidth() == 0
&& viewMatrix.hasPerspective()) {
return false;
}
// No color bitmap fonts.
SkScalerContext::Rec rec;
SkScalerContext::MakeRec(skPaint, &fDeviceProperties, NULL, &rec);
return rec.getFormat() != SkMask::kARGB32_Format;
}
bool GrDistanceFieldTextContext::canDraw(const SkPaint& paint) {
if (!fEnableDFRendering && !paint.isDistanceFieldTextTEMP()) {
return false;
}
// rasterizers and mask filters modify alpha, which doesn't
// translate well to distance
if (paint.getRasterizer() || paint.getMaskFilter() ||
!fContext->getTextTarget()->caps()->shaderDerivativeSupport()) {
return false;
}
// TODO: add some stroking support
if (paint.getStyle() != SkPaint::kFill_Style) {
return false;
}
// TODO: choose an appropriate maximum scale for distance fields and
// enable perspective
if (SkDraw::ShouldDrawTextAsPaths(paint, fContext->getMatrix())) {
return false;
}
return true;
}
bool GrTextUtils::ShouldDisableLCD(const SkPaint& paint) {
return !SkXfermode::AsMode(paint.getXfermode(), nullptr) ||
paint.getMaskFilter() ||
paint.getRasterizer() ||
paint.getPathEffect() ||
paint.isFakeBoldText() ||
paint.getStyle() != SkPaint::kFill_Style;
}
void SkBaseDevice::drawArc(const SkDraw& draw, const SkRect& oval, SkScalar startAngle,
SkScalar sweepAngle, bool useCenter, const SkPaint& paint) {
SkPath path;
bool isFillNoPathEffect = SkPaint::kFill_Style == paint.getStyle() && !paint.getPathEffect();
SkPathPriv::CreateDrawArcPath(&path, oval, startAngle, sweepAngle, useCenter,
isFillNoPathEffect);
this->drawPath(draw, path, paint);
}
TessellationCache::Description::Description(Type type, const Matrix4& transform, const SkPaint& paint)
: type(type)
, aa(paint.isAntiAlias())
, cap(paint.getStrokeCap())
, style(paint.getStyle())
, strokeWidth(paint.getStrokeWidth()) {
PathTessellator::extractTessellationScales(transform, &scaleX, &scaleY);
memset(&shape, 0, sizeof(Shape));
}
void OpaqueRegionSkia::didDrawRect(const PlatformContextSkia* context, const SkRect& fillRect, const SkPaint& paint, const SkBitmap* sourceBitmap)
{
// Any stroking may put alpha in pixels even if the filling part does not.
if (paint.getStyle() != SkPaint::kFill_Style) {
bool fillsBounds = false;
if (!paint.canComputeFastBounds())
didDrawUnbounded(paint);
else {
SkRect strokeRect;
strokeRect = paint.computeFastBounds(fillRect, &strokeRect);
didDraw(context, strokeRect, paint, sourceBitmap, fillsBounds, FillOrStroke);
}
}
bool fillsBounds = paint.getStyle() != SkPaint::kStroke_Style;
didDraw(context, fillRect, paint, sourceBitmap, fillsBounds, FillOnly);
}
static void paint_write(const SkPaint& paint, SkFlattenableWriteBuffer& buffer)
{
buffer.writeBool(paint.isAntiAlias());
buffer.write8(paint.getStyle());
buffer.write8(paint.getAlpha());
if (paint.getStyle() != SkPaint::kFill_Style)
{
buffer.writeScalar(paint.getStrokeWidth());
buffer.writeScalar(paint.getStrokeMiter());
buffer.write8(paint.getStrokeCap());
buffer.write8(paint.getStrokeJoin());
}
buffer.writeFlattenable(paint.getMaskFilter());
buffer.writeFlattenable(paint.getPathEffect());
buffer.writeFlattenable(paint.getRasterizer());
buffer.writeFlattenable(paint.getXfermode());
}
void SkGLDevice::drawPath(const SkDraw& draw, const SkPath& path,
const SkPaint& paint) {
TRACE_DRAW("coreDrawPath", this, draw);
if (paint.getStyle() == SkPaint::kStroke_Style) {
return;
}
AutoPaintShader shader(this, paint);
SkGL::FillPath(path, paint, shader.useTex(), this->updateMatrixClip());
}
bool SkBitmapDevice::onShouldDisableLCD(const SkPaint& paint) const {
if (kN32_SkColorType != fBitmap.colorType() ||
paint.getRasterizer() ||
paint.getPathEffect() ||
paint.isFakeBoldText() ||
paint.getStyle() != SkPaint::kFill_Style ||
!SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode))
{
return true;
}
return false;
}
void OpaqueRegionSkia::didDrawRect(const PlatformContextSkia* context, const AffineTransform& transform, const SkRect& fillRect, const SkPaint& paint, const SkBitmap* bitmap)
{
// Any stroking may put alpha in pixels even if the filling part does not.
if (paint.getStyle() != SkPaint::kFill_Style) {
bool opaque = paintIsOpaque(paint, bitmap);
bool fillsBounds = false;
if (!paint.canComputeFastBounds())
didDrawUnbounded(paint, opaque);
else {
SkRect strokeRect;
strokeRect = paint.computeFastBounds(fillRect, &strokeRect);
didDraw(context, transform, strokeRect, paint, opaque, fillsBounds);
}
}
bool checkFillOnly = true;
bool opaque = paintIsOpaque(paint, bitmap, checkFillOnly);
bool fillsBounds = paint.getStyle() != SkPaint::kStroke_Style;
didDraw(context, transform, fillRect, paint, opaque, fillsBounds);
}
void GrTextUtils::DrawPosTextAsPath(GrContext* context,
GrDrawContext* dc,
const SkSurfaceProps& props,
const GrClip& clip,
const SkPaint& origPaint, const SkMatrix& viewMatrix,
const char text[], size_t byteLength,
const SkScalar pos[], int scalarsPerPosition,
const SkPoint& offset, const SkIRect& clipBounds) {
// setup our std paint, in hopes of getting hits in the cache
SkPaint paint(origPaint);
SkScalar matrixScale = paint.setupForAsPaths();
SkMatrix matrix;
matrix.setScale(matrixScale, matrixScale);
// Temporarily jam in kFill, so we only ever ask for the raw outline from the cache.
paint.setStyle(SkPaint::kFill_Style);
paint.setPathEffect(nullptr);
SkPaint::GlyphCacheProc glyphCacheProc = paint.getGlyphCacheProc(true);
SkAutoGlyphCache autoCache(paint, &props, nullptr);
SkGlyphCache* cache = autoCache.getCache();
const char* stop = text + byteLength;
SkTextAlignProc alignProc(paint.getTextAlign());
SkTextMapStateProc tmsProc(SkMatrix::I(), offset, scalarsPerPosition);
// Now restore the original settings, so we "draw" with whatever style/stroking.
paint.setStyle(origPaint.getStyle());
paint.setPathEffect(origPaint.getPathEffect());
while (text < stop) {
const SkGlyph& glyph = glyphCacheProc(cache, &text);
if (glyph.fWidth) {
const SkPath* path = cache->findPath(glyph);
if (path) {
SkPoint tmsLoc;
tmsProc(pos, &tmsLoc);
SkPoint loc;
alignProc(tmsLoc, glyph, &loc);
matrix[SkMatrix::kMTransX] = loc.fX;
matrix[SkMatrix::kMTransY] = loc.fY;
GrBlurUtils::drawPathWithMaskFilter(context, dc, clip, *path, paint,
viewMatrix, &matrix, clipBounds, false);
}
}
pos += scalarsPerPosition;
}
}
static uint16_t compute_nondef(const SkPaint& paint, PaintUsage usage) {
// kRespectsStroke_PaintUsage is only valid if other bits are also set
SkASSERT(0 != (usage & ~kRespectsStroke_PaintUsage));
const SkScalar kTextSize_Default = 12;
const SkScalar kTextScaleX_Default = 1;
const SkScalar kTextSkewX_Default = 0;
const SkScalar kStrokeWidth_Default = 0;
const SkScalar kStrokeMiter_Default = 4;
const SkColor kColor_Default = SK_ColorBLACK;
unsigned bits = (paint.getColor() != kColor_Default) ? kColor_NonDef : 0;
if (usage & kText_PaintUsage) {
bits |= (paint.getTextSize() != kTextSize_Default ? kTextSize_NonDef : 0);
bits |= (paint.getTextScaleX() != kTextScaleX_Default ? kTextScaleX_NonDef : 0);
bits |= (paint.getTextSkewX() != kTextSkewX_Default ? kTextSkewX_NonDef : 0);
bits |= (paint.getTypeface() ? kTypeface_NonDef : 0);
}
// TODO: kImage_PaintUsage only needs the shader/maskfilter IF its colortype is kAlpha_8
if (usage & (kVertices_PaintUsage | kDrawPaint_PaintUsage | kImage_PaintUsage |
kText_PaintUsage | kGeometry_PaintUsage | kTextBlob_PaintUsage)) {
bits |= (paint.getShader() ? kShader_NonDef : 0);
}
if (usage & (kText_PaintUsage | kGeometry_PaintUsage | kTextBlob_PaintUsage)) {
bits |= (paint.getPathEffect() ? kPathEffect_NonDef : 0);
bits |= (paint.getRasterizer() ? kRasterizer_NonDef : 0);
if (paint.getStyle() != SkPaint::kFill_Style || (usage & kRespectsStroke_PaintUsage)) {
bits |= (paint.getStrokeWidth() != kStrokeWidth_Default ? kStrokeWidth_NonDef : 0);
bits |= (paint.getStrokeMiter() != kStrokeMiter_Default ? kStrokeMiter_NonDef : 0);
}
}
if (usage &
(kText_PaintUsage | kGeometry_PaintUsage | kImage_PaintUsage | kTextBlob_PaintUsage))
{
bits |= (paint.getMaskFilter() ? kMaskFilter_NonDef : 0);
}
bits |= (paint.getColorFilter() ? kColorFilter_NonDef : 0);
bits |= (paint.getImageFilter() ? kImageFilter_NonDef : 0);
bits |= (paint.getDrawLooper() ? kDrawLooper_NonDef : 0);
return SkToU16(bits);
}
bool GrStencilAndCoverTextContext::internalCanDraw(const SkPaint& skPaint) {
if (skPaint.getRasterizer()) {
return false;
}
if (skPaint.getMaskFilter()) {
return false;
}
if (SkPathEffect* pe = skPaint.getPathEffect()) {
if (pe->asADash(nullptr) != SkPathEffect::kDash_DashType) {
return false;
}
}
// No hairlines. They would require new paths with customized strokes for every new draw matrix.
return SkPaint::kStroke_Style != skPaint.getStyle() || 0 != skPaint.getStrokeWidth();
}
static void apply_paint_style(const SkPaint& paint, Json::Value* target) {
SkPaint::Style style = paint.getStyle();
if (style != SkPaint::kFill_Style) {
switch (style) {
case SkPaint::kStroke_Style: {
Json::Value stroke(SKJSONCANVAS_STYLE_STROKE);
(*target)[SKJSONCANVAS_ATTRIBUTE_STYLE] = stroke;
break;
}
case SkPaint::kStrokeAndFill_Style: {
Json::Value strokeAndFill(SKJSONCANVAS_STYLE_STROKEANDFILL);
(*target)[SKJSONCANVAS_ATTRIBUTE_STYLE] = strokeAndFill;
break;
}
default: SkASSERT(false);
}
}
}
void SkBaseDevice::drawRegion(const SkDraw& draw, const SkRegion& region, const SkPaint& paint) {
bool isNonTranslate = draw.fMatrix->getType() & ~(SkMatrix::kTranslate_Mask);
bool complexPaint = paint.getStyle() != SkPaint::kFill_Style || paint.getMaskFilter() ||
paint.getPathEffect();
bool antiAlias = paint.isAntiAlias() && (!is_int(draw.fMatrix->getTranslateX()) ||
!is_int(draw.fMatrix->getTranslateY()));
if (isNonTranslate || complexPaint || antiAlias) {
SkPath path;
region.getBoundaryPath(&path);
return this->drawPath(draw, path, paint, nullptr, false);
}
SkRegion::Iterator it(region);
while (!it.done()) {
this->drawRect(draw, SkRect::Make(it.rect()), paint);
it.next();
}
}
void SkSVGDevice::AutoElement::addPaint(const SkPaint& paint, const Resources& resources) {
SkPaint::Style style = paint.getStyle();
if (style == SkPaint::kFill_Style || style == SkPaint::kStrokeAndFill_Style) {
this->addAttribute("fill", resources.fPaintServer);
if (SK_AlphaOPAQUE != SkColorGetA(paint.getColor())) {
this->addAttribute("fill-opacity", svg_opacity(paint.getColor()));
}
} else {
SkASSERT(style == SkPaint::kStroke_Style);
this->addAttribute("fill", "none");
}
if (style == SkPaint::kStroke_Style || style == SkPaint::kStrokeAndFill_Style) {
this->addAttribute("stroke", resources.fPaintServer);
SkScalar strokeWidth = paint.getStrokeWidth();
if (strokeWidth == 0) {
// Hairline stroke
strokeWidth = 1;
this->addAttribute("vector-effect", "non-scaling-stroke");
}
this->addAttribute("stroke-width", strokeWidth);
if (const char* cap = svg_cap(paint.getStrokeCap())) {
this->addAttribute("stroke-linecap", cap);
}
if (const char* join = svg_join(paint.getStrokeJoin())) {
this->addAttribute("stroke-linejoin", join);
}
if (paint.getStrokeJoin() == SkPaint::kMiter_Join) {
this->addAttribute("stroke-miterlimit", paint.getStrokeMiter());
}
if (SK_AlphaOPAQUE != SkColorGetA(paint.getColor())) {
this->addAttribute("stroke-opacity", svg_opacity(paint.getColor()));
}
} else {
SkASSERT(style == SkPaint::kFill_Style);
this->addAttribute("stroke", "none");
}
}
static void drawAndTest(skiatest::Reporter* reporter, const SkPath& path,
const SkPaint& paint, bool shouldDraw) {
SkBitmap bm;
bm.allocN32Pixels(DIMENSION, DIMENSION);
SkASSERT(DIMENSION*4 == bm.rowBytes()); // ensure no padding on each row
bm.eraseColor(SK_ColorTRANSPARENT);
SkCanvas canvas(bm);
SkPaint p(paint);
p.setColor(SK_ColorWHITE);
canvas.drawPath(path, p);
size_t count = DIMENSION * DIMENSION;
const SkPMColor* ptr = bm.getAddr32(0, 0);
SkPMColor andValue = ~0U;
SkPMColor orValue = 0;
for (size_t i = 0; i < count; ++i) {
SkPMColor c = ptr[i];
andValue &= c;
orValue |= c;
}
// success means we drew everywhere or nowhere (depending on shouldDraw)
bool success = shouldDraw ? (~0U == andValue) : (0 == orValue);
if (!success) {
const char* str;
if (shouldDraw) {
str = "Path expected to draw everywhere, but didn't. ";
} else {
str = "Path expected to draw nowhere, but did. ";
}
ERRORF(reporter, "%s style[%d] cap[%d] join[%d] antialias[%d]"
" filltype[%d] ptcount[%d]", str, paint.getStyle(),
paint.getStrokeCap(), paint.getStrokeJoin(),
paint.isAntiAlias(), path.getFillType(), path.countPoints());
// uncomment this if you want to step in to see the failure
// canvas.drawPath(path, p);
}
}
bool SkBitmapDevice::filterTextFlags(const SkPaint& paint, TextFlags* flags) {
if (!paint.isLCDRenderText() || !paint.isAntiAlias()) {
// we're cool with the paint as is
return false;
}
if (kN32_SkColorType != fBitmap.colorType() ||
paint.getRasterizer() ||
paint.getPathEffect() ||
paint.isFakeBoldText() ||
paint.getStyle() != SkPaint::kFill_Style ||
!SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode)) {
// turn off lcd
flags->fFlags = paint.getFlags() & ~SkPaint::kLCDRenderText_Flag;
flags->fHinting = paint.getHinting();
return true;
}
// we're cool with the paint as is
return false;
}
void SkPDFDevice::drawPath(const SkDraw& d, const SkPath& path,
const SkPaint& paint, const SkMatrix* prePathMatrix,
bool pathIsMutable) {
NOT_IMPLEMENTED(prePathMatrix != NULL, true);
if (paint.getPathEffect()) {
// Apply the path effect to path and draw it that way.
SkPath noEffectPath;
paint.getFillPath(path, &noEffectPath);
SkPaint noEffectPaint(paint);
SkSafeUnref(noEffectPaint.setPathEffect(NULL));
drawPath(d, noEffectPath, noEffectPaint, NULL, true);
return;
}
updateGSFromPaint(paint, false);
SkPDFUtils::EmitPath(path, &fContent);
SkPDFUtils::PaintPath(paint.getStyle(), path.getFillType(), &fContent);
}
PassRefPtr<JSONObject> LoggingCanvas::objectForSkPaint(const SkPaint& paint)
{
RefPtr<JSONObject> paintItem = JSONObject::create();
paintItem->setNumber("textSize", paint.getTextSize());
paintItem->setNumber("textScaleX", paint.getTextScaleX());
paintItem->setNumber("textSkewX", paint.getTextSkewX());
if (SkShader* shader = paint.getShader())
paintItem->setObject("shader", objectForSkShader(*shader));
paintItem->setString("color", stringForSkColor(paint.getColor()));
paintItem->setNumber("strokeWidth", paint.getStrokeWidth());
paintItem->setNumber("strokeMiter", paint.getStrokeMiter());
paintItem->setString("flags", stringForSkPaintFlags(paint));
paintItem->setString("filterLevel", filterQualityName(paint.getFilterQuality()));
paintItem->setString("textAlign", textAlignName(paint.getTextAlign()));
paintItem->setString("strokeCap", strokeCapName(paint.getStrokeCap()));
paintItem->setString("strokeJoin", strokeJoinName(paint.getStrokeJoin()));
paintItem->setString("styleName", styleName(paint.getStyle()));
paintItem->setString("textEncoding", textEncodingName(paint.getTextEncoding()));
paintItem->setString("hinting", hintingName(paint.getHinting()));
return paintItem.release();
}
// Returns true if all pixels painted will be opaque.
static inline bool paintIsOpaque(const SkPaint& paint, const SkBitmap* bitmap = 0, bool checkFillOnly = false)
{
if (paint.getAlpha() < 0xFF)
return false;
if (!checkFillOnly && paint.getStyle() != SkPaint::kFill_Style && paint.isAntiAlias())
return false;
SkShader* shader = paint.getShader();
if (shader && !shader->isOpaque())
return false;
if (bitmap && !bitmap->isOpaque())
return false;
if (paint.getLooper())
return false;
if (paint.getImageFilter())
return false;
if (paint.getMaskFilter())
return false;
SkColorFilter* colorFilter = paint.getColorFilter();
if (colorFilter && !(colorFilter->getFlags() & SkColorFilter::kAlphaUnchanged_Flag))
return false;
return true;
}
void SkPDFDevice::drawRect(const SkDraw& d, const SkRect& r,
const SkPaint& paint) {
if (paint.getPathEffect()) {
// Create a path for the rectangle and apply the path effect to it.
SkPath path;
path.addRect(r);
paint.getFillPath(path, &path);
SkPaint noEffectPaint(paint);
SkSafeUnref(noEffectPaint.setPathEffect(NULL));
drawPath(d, path, noEffectPaint, NULL, true);
return;
}
updateGSFromPaint(paint, false);
// Skia has 0,0 at top left, pdf at bottom left. Do the right thing.
SkScalar bottom = r.fBottom < r.fTop ? r.fBottom : r.fTop;
SkPDFUtils::AppendRectangle(r.fLeft, bottom, r.width(), r.height(),
&fContent);
SkPDFUtils::PaintPath(paint.getStyle(), SkPath::kWinding_FillType,
&fContent);
}
sk_sp<SkPDFDict> SkPDFGraphicState::GetGraphicStateForPaint(SkPDFCanon* canon,
const SkPaint& p) {
SkASSERT(canon);
if (SkPaint::kFill_Style == p.getStyle()) {
SkPDFFillGraphicState fillKey = {p.getAlpha(), pdf_blend_mode(p.getBlendMode())};
auto& fillMap = canon->fFillGSMap;
if (sk_sp<SkPDFDict>* statePtr = fillMap.find(fillKey)) {
return *statePtr;
}
auto state = sk_make_sp<SkPDFDict>();
state->reserve(2);
state->insertScalar("ca", fillKey.fAlpha / 255.0f);
state->insertName("BM", as_pdf_blend_mode_name((SkBlendMode)fillKey.fBlendMode));
fillMap.set(fillKey, state);
return state;
} else {
SkPDFStrokeGraphicState strokeKey = {
p.getStrokeWidth(), p.getStrokeMiter(),
SkToU8(p.getStrokeCap()), SkToU8(p.getStrokeJoin()),
p.getAlpha(), pdf_blend_mode(p.getBlendMode())};
auto& sMap = canon->fStrokeGSMap;
if (sk_sp<SkPDFDict>* statePtr = sMap.find(strokeKey)) {
return *statePtr;
}
auto state = sk_make_sp<SkPDFDict>();
state->reserve(8);
state->insertScalar("CA", strokeKey.fAlpha / 255.0f);
state->insertScalar("ca", strokeKey.fAlpha / 255.0f);
state->insertInt("LC", to_stroke_cap(strokeKey.fStrokeCap));
state->insertInt("LJ", to_stroke_join(strokeKey.fStrokeJoin));
state->insertScalar("LW", strokeKey.fStrokeWidth);
state->insertScalar("ML", strokeKey.fStrokeMiter);
state->insertBool("SA", true); // SA = Auto stroke adjustment.
state->insertName("BM", as_pdf_blend_mode_name((SkBlendMode)strokeKey.fBlendMode));
sMap.set(strokeKey, state);
return state;
}
}
bool GrTextUtils::CanDrawAsDistanceFields(const SkPaint& skPaint, const SkMatrix& viewMatrix,
const SkSurfaceProps& props, const GrShaderCaps& caps) {
// TODO: support perspective (need getMaxScale replacement)
if (viewMatrix.hasPerspective()) {
return false;
}
SkScalar maxScale = viewMatrix.getMaxScale();
SkScalar scaledTextSize = maxScale*skPaint.getTextSize();
// Hinted text looks far better at small resolutions
// Scaling up beyond 2x yields undesireable artifacts
if (scaledTextSize < kMinDFFontSize ||
scaledTextSize > kLargeDFFontLimit) {
return false;
}
bool useDFT = props.isUseDeviceIndependentFonts();
#if SK_FORCE_DISTANCE_FIELD_TEXT
useDFT = true;
#endif
if (!useDFT && scaledTextSize < kLargeDFFontSize) {
return false;
}
// rasterizers and mask filters modify alpha, which doesn't
// translate well to distance
if (skPaint.getRasterizer() || skPaint.getMaskFilter() || !caps.shaderDerivativeSupport()) {
return false;
}
// TODO: add some stroking support
if (skPaint.getStyle() != SkPaint::kFill_Style) {
return false;
}
return true;
}
bool GrStencilAndCoverTextContext::canDraw(const SkPaint& paint) {
if (paint.getRasterizer()) {
return false;
}
if (paint.getMaskFilter()) {
return false;
}
if (paint.getPathEffect()) {
return false;
}
// No hairlines unless we can map the 1 px width to the object space.
if (paint.getStyle() == SkPaint::kStroke_Style
&& paint.getStrokeWidth() == 0
&& fContext->getMatrix().hasPerspective()) {
return false;
}
// No color bitmap fonts.
SkScalerContext::Rec rec;
SkScalerContext::MakeRec(paint, &fDeviceProperties, NULL, &rec);
return rec.getFormat() != SkMask::kARGB32_Format;
}
bool SkDevice::filterTextFlags(const SkPaint& paint, TextFlags* flags) {
if (!paint.isLCDRenderText()) {
// we're cool with the paint as is
return false;
}
if (SkBitmap::kARGB_8888_Config != fBitmap.config() ||
paint.getShader() ||
paint.getXfermode() || // unless its srcover
paint.getMaskFilter() ||
paint.getRasterizer() ||
paint.getColorFilter() ||
paint.getPathEffect() ||
paint.isFakeBoldText() ||
paint.getStyle() != SkPaint::kFill_Style) {
// turn off lcd
flags->fFlags = paint.getFlags() & ~SkPaint::kLCDRenderText_Flag;
flags->fHinting = paint.getHinting();
return true;
}
// we're cool with the paint as is
return false;
}
bool GrTextContext::CanDrawAsDistanceFields(const SkPaint& paint, const SkFont& font,
const SkMatrix& viewMatrix,
const SkSurfaceProps& props,
bool contextSupportsDistanceFieldText,
const Options& options) {
if (!viewMatrix.hasPerspective()) {
SkScalar maxScale = viewMatrix.getMaxScale();
SkScalar scaledTextSize = maxScale * font.getSize();
// Hinted text looks far better at small resolutions
// Scaling up beyond 2x yields undesireable artifacts
if (scaledTextSize < options.fMinDistanceFieldFontSize ||
scaledTextSize > options.fMaxDistanceFieldFontSize) {
return false;
}
bool useDFT = props.isUseDeviceIndependentFonts();
#if SK_FORCE_DISTANCE_FIELD_TEXT
useDFT = true;
#endif
if (!useDFT && scaledTextSize < kLargeDFFontSize) {
return false;
}
}
// mask filters modify alpha, which doesn't translate well to distance
if (paint.getMaskFilter() || !contextSupportsDistanceFieldText) {
return false;
}
// TODO: add some stroking support
if (paint.getStyle() != SkPaint::kFill_Style) {
return false;
}
return true;
}