virtual void onDrawContent(SkCanvas* canvas) {
const char* str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
SkPaint paint;
SkScalar x = SkIntToScalar(10);
SkScalar y = SkIntToScalar(20);
paint.setFlags(0x105);
paint.setARGB(fByte, 0xFF, 0xFF, 0xFF);
paint.setMaskFilter(SkBlurMaskFilter::Create(SkIntToScalar(3),
SkBlurMaskFilter::kNormal_BlurStyle));
paint.getMaskFilter()->unref();
SkRandom rand;
for (int ps = 6; ps <= 35; ps++) {
paint.setColor(rand.nextU() | (0xFF << 24));
paint.setTextSize(SkIntToScalar(ps));
paint.setTextSize(SkIntToScalar(24));
canvas->drawText(str, strlen(str), x, y, paint);
y += paint.getFontMetrics(NULL);
}
if (false) { // avoid bit rot, suppress warning
check_for_nonwhite(canvas->getDevice()->accessBitmap(false), fByte);
SkDebugf("------ byte %x\n", fByte);
}
if (false) {
fByte += 1;
fByte &= 0xFF;
this->inval(NULL);
}
}
static bool Supports(const SkPixmap& dst, const SkPixmap& src, const SkPaint& paint) {
if (dst.colorType() != src.colorType()) {
return false;
}
if (dst.info().profileType() != src.info().profileType()) {
return false;
}
if (paint.getMaskFilter() || paint.getColorFilter() || paint.getImageFilter()) {
return false;
}
if (0xFF != paint.getAlpha()) {
return false;
}
SkXfermode::Mode mode;
if (!SkXfermode::AsMode(paint.getXfermode(), &mode)) {
return false;
}
if (SkXfermode::kSrc_Mode == mode) {
return true;
}
if (SkXfermode::kSrcOver_Mode == mode && src.isOpaque()) {
return true;
}
return false;
}
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;
}
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;
}
static bool Supports(const SkPixmap& dst, const SkPixmap& src, const SkPaint& paint) {
if (dst.colorType() != src.colorType()) {
return false;
}
if (dst.info().gammaCloseToSRGB() != src.info().gammaCloseToSRGB()) {
return false;
}
if (paint.getMaskFilter() || paint.getColorFilter() || paint.getImageFilter()) {
return false;
}
if (0xFF != paint.getAlpha()) {
return false;
}
SkBlendMode mode = paint.getBlendMode();
if (SkBlendMode::kSrc == mode) {
return true;
}
if (SkBlendMode::kSrcOver == mode && src.isOpaque()) {
return true;
}
// At this point memcpy can't be used. The following check for using SrcOver.
if (dst.colorType() != kN32_SkColorType || !dst.info().gammaCloseToSRGB()) {
return false;
}
return SkBlendMode::kSrcOver == mode;
}
void GrBlurUtils::drawPathWithMaskFilter(GrContext* context,
GrDrawContext* drawContext,
const GrClip& clip,
const SkPath& origPath,
const SkPaint& paint,
const SkMatrix& origViewMatrix,
const SkMatrix* prePathMatrix,
const SkIRect& clipBounds,
bool pathIsMutable) {
SkASSERT(!pathIsMutable || origPath.isVolatile());
GrStyle style(paint);
// If we have a prematrix, apply it to the path, optimizing for the case
// where the original path can in fact be modified in place (even though
// its parameter type is const).
const SkPath* path = &origPath;
SkTLazy<SkPath> tmpPath;
SkMatrix viewMatrix = origViewMatrix;
if (prePathMatrix) {
// Styling, blurs, and shading are supposed to be applied *after* the prePathMatrix.
if (!paint.getMaskFilter() && !paint.getShader() && !style.applies()) {
viewMatrix.preConcat(*prePathMatrix);
} else {
SkPath* result = pathIsMutable ? const_cast<SkPath*>(path) : tmpPath.init();
pathIsMutable = true;
path->transform(*prePathMatrix, result);
path = result;
result->setIsVolatile(true);
}
}
// at this point we're done with prePathMatrix
SkDEBUGCODE(prePathMatrix = (const SkMatrix*)0x50FF8001;)
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;
}
static inline bool CanApplyDstMatrixAsCTM(const SkMatrix& m, const SkPaint& paint) {
if (!paint.getMaskFilter()) {
return true;
}
// Some mask filters parameters (sigma) depend on the CTM/scale.
return m.getType() <= SkMatrix::kTranslate_Mask;
}
static bool fold_opacity_layer_color_to_paint(const SkPaint& layerPaint,
bool isSaveLayer,
SkPaint* paint) {
// We assume layerPaint is always from a saveLayer. If isSaveLayer is
// true, we assume paint is too.
// The alpha folding can proceed if the filter layer paint does not have properties which cause
// the resulting filter layer to be "blended" in complex ways to the parent layer. For example,
// looper drawing unmodulated filter layer twice and then modulating the result produces
// different image to drawing modulated filter layer twice.
// TODO: most likely the looper and only some xfer modes are the hard constraints
if (paint->getXfermode() || paint->getLooper()) {
return false;
}
if (!isSaveLayer && paint->getImageFilter()) {
// For normal draws, the paint color is used as one input for the color for the draw. Image
// filter will operate on the result, and thus we can not change the input.
// For layer saves, the image filter is applied to the layer contents. The layer is then
// modulated with the paint color, so it's fine to proceed with the fold for saveLayer
// paints with image filters.
return false;
}
if (paint->getColorFilter()) {
// Filter input depends on the paint color.
// Here we could filter the color if we knew the draw is going to be uniform color. This
// should be detectable as drawPath/drawRect/.. without a shader being uniform, while
// drawBitmap/drawSprite or a shader being non-uniform. However, current matchers don't
// give the type out easily, so just do not optimize that at the moment.
return false;
}
const uint32_t layerColor = layerPaint.getColor();
// The layer paint color must have only alpha component.
if (SK_ColorTRANSPARENT != SkColorSetA(layerColor, SK_AlphaTRANSPARENT)) {
return false;
}
// The layer paint can not have any effects.
if (layerPaint.getPathEffect() ||
layerPaint.getShader() ||
layerPaint.getXfermode() ||
layerPaint.getMaskFilter() ||
layerPaint.getColorFilter() ||
layerPaint.getRasterizer() ||
layerPaint.getLooper() ||
layerPaint.getImageFilter()) {
return false;
}
paint->setAlpha(SkMulDiv255Round(paint->getAlpha(), SkColorGetA(layerColor)));
return true;
}
// Is the supplied paint simply a color?
static bool is_simple(const SkPaint& p) {
return NULL == p.getPathEffect() &&
NULL == p.getShader() &&
NULL == p.getXfermode() &&
NULL == p.getMaskFilter() &&
NULL == p.getColorFilter() &&
NULL == p.getRasterizer() &&
NULL == p.getLooper() &&
NULL == p.getImageFilter();
}
static bool HasAnyEffect(const SkPaint& paint) {
return paint.getPathEffect() ||
paint.getShader() ||
paint.getXfermode() ||
paint.getMaskFilter() ||
paint.getColorFilter() ||
paint.getRasterizer() ||
paint.getLooper() ||
paint.getImageFilter();
}
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();
}
bool SkPaintPriv::ShouldDither(const SkPaint& p, SkColorType dstCT) {
// The paint dither flag can veto.
if (!p.isDither()) {
return false;
}
// We always dither 565 or 4444 when requested.
if (dstCT == kRGB_565_SkColorType || dstCT == kARGB_4444_SkColorType) {
return true;
}
// Otherwise, dither is only needed for non-const paints.
return p.getImageFilter() || p.getMaskFilter()
|| !p.getShader() || !as_SB(p.getShader())->isConstant();
}
void GrBlurUtils::drawPathWithMaskFilter(GrContext* context,
GrDrawContext* drawContext,
const GrClip& clip,
const SkPath& origSrcPath,
const SkPaint& paint,
const SkMatrix& origViewMatrix,
const SkMatrix* prePathMatrix,
const SkIRect& clipBounds,
bool pathIsMutable) {
SkASSERT(!pathIsMutable || origSrcPath.isVolatile());
GrStrokeInfo strokeInfo(paint);
// comment out the line below to determine if it is the reason that the chrome mac perf bot
// has begun crashing
// strokeInfo.setResScale(SkDraw::ComputeResScaleForStroking(origViewMatrix));
// If we have a prematrix, apply it to the path, optimizing for the case
// where the original path can in fact be modified in place (even though
// its parameter type is const).
SkPath* pathPtr = const_cast<SkPath*>(&origSrcPath);
SkTLazy<SkPath> tmpPath;
SkTLazy<SkPath> effectPath;
SkPathEffect* pathEffect = paint.getPathEffect();
SkMatrix viewMatrix = origViewMatrix;
if (prePathMatrix) {
// stroking, path effects, and blurs are supposed to be applied *after* the prePathMatrix.
// The pre-path-matrix also should not affect shading.
if (!paint.getMaskFilter() && !pathEffect && !paint.getShader() &&
(strokeInfo.isFillStyle() || strokeInfo.isHairlineStyle())) {
viewMatrix.preConcat(*prePathMatrix);
} else {
SkPath* result = pathPtr;
if (!pathIsMutable) {
result = tmpPath.init();
result->setIsVolatile(true);
pathIsMutable = true;
}
// should I push prePathMatrix on our MV stack temporarily, instead
// of applying it here? See SkDraw.cpp
pathPtr->transform(*prePathMatrix, result);
pathPtr = result;
}
}
// at this point we're done with prePathMatrix
SkDEBUGCODE(prePathMatrix = (const SkMatrix*)0x50FF8001;)
static bool Supports(const SkPixmap& dst, const SkPixmap& src, const SkPaint& paint) {
if (dst.colorType() != src.colorType()) {
return false;
}
if (!SkColorSpace::Equals(dst.colorSpace(), src.colorSpace())) {
return false;
}
if (paint.getMaskFilter() || paint.getColorFilter() || paint.getImageFilter()) {
return false;
}
if (0xFF != paint.getAlpha()) {
return false;
}
SkBlendMode mode = paint.getBlendMode();
return SkBlendMode::kSrc == mode || (SkBlendMode::kSrcOver == mode && src.isOpaque());
}
static bool Supports(const SkPixmap& dst, const SkPixmap& src, const SkPaint& paint) {
// the caller has already inspected the colorspace on src and dst
SkASSERT(!SkColorSpaceXformSteps::Required(src.colorSpace(), dst.colorSpace()));
if (dst.colorType() != src.colorType()) {
return false;
}
if (paint.getMaskFilter() || paint.getColorFilter() || paint.getImageFilter()) {
return false;
}
if (0xFF != paint.getAlpha()) {
return false;
}
SkBlendMode mode = paint.getBlendMode();
return SkBlendMode::kSrc == mode || (SkBlendMode::kSrcOver == mode && src.isOpaque());
}
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();
}
}
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());
}
static void apply_paint_maskfilter(const SkPaint& paint, Json::Value* target, bool sendBinaries) {
SkMaskFilter* maskFilter = paint.getMaskFilter();
if (maskFilter != nullptr) {
SkMaskFilter::BlurRec blurRec;
if (maskFilter->asABlur(&blurRec)) {
Json::Value blur(Json::objectValue);
blur[SKJSONCANVAS_ATTRIBUTE_SIGMA] = Json::Value(blurRec.fSigma);
switch (blurRec.fStyle) {
case SkBlurStyle::kNormal_SkBlurStyle:
blur[SKJSONCANVAS_ATTRIBUTE_STYLE] = Json::Value(SKJSONCANVAS_BLURSTYLE_NORMAL);
break;
case SkBlurStyle::kSolid_SkBlurStyle:
blur[SKJSONCANVAS_ATTRIBUTE_STYLE] = Json::Value(SKJSONCANVAS_BLURSTYLE_SOLID);
break;
case SkBlurStyle::kOuter_SkBlurStyle:
blur[SKJSONCANVAS_ATTRIBUTE_STYLE] = Json::Value(SKJSONCANVAS_BLURSTYLE_OUTER);
break;
case SkBlurStyle::kInner_SkBlurStyle:
blur[SKJSONCANVAS_ATTRIBUTE_STYLE] = Json::Value(SKJSONCANVAS_BLURSTYLE_INNER);
break;
default:
SkASSERT(false);
}
switch (blurRec.fQuality) {
case SkBlurQuality::kLow_SkBlurQuality:
blur[SKJSONCANVAS_ATTRIBUTE_QUALITY] = Json::Value(SKJSONCANVAS_BLURQUALITY_LOW);
break;
case SkBlurQuality::kHigh_SkBlurQuality:
blur[SKJSONCANVAS_ATTRIBUTE_QUALITY] = Json::Value(SKJSONCANVAS_BLURQUALITY_HIGH);
break;
default:
SkASSERT(false);
}
(*target)[SKJSONCANVAS_ATTRIBUTE_BLUR] = blur;
}
else {
Json::Value jsonMaskFilter;
flatten(maskFilter, &jsonMaskFilter, sendBinaries);
(*target)[SKJSONCANVAS_ATTRIBUTE_MASKFILTER] = jsonMaskFilter;
}
}
}
// 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;
}
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;
}
void onDrawContent(SkCanvas* canvas) override {
const char* str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
SkPaint paint;
SkScalar x = SkIntToScalar(10);
SkScalar y = SkIntToScalar(20);
paint.setFlags(0x105);
paint.setARGB(fByte, 0xFF, 0xFF, 0xFF);
paint.setMaskFilter(SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(3))));
paint.getMaskFilter()->unref();
SkRandom rand;
for (int ps = 6; ps <= 35; ps++) {
paint.setColor(rand.nextU() | (0xFF << 24));
paint.setTextSize(SkIntToScalar(ps));
paint.setTextSize(SkIntToScalar(24));
canvas->drawText(str, strlen(str), x, y, paint);
y += paint.getFontMetrics(nullptr);
}
}
void SkPDFDevice::updateGSFromPaint(const SkPaint& paint, bool forText) {
SkASSERT(paint.getPathEffect() == NULL);
NOT_IMPLEMENTED(paint.getMaskFilter() != NULL, false);
NOT_IMPLEMENTED(paint.getColorFilter() != NULL, false);
SkPaint newPaint = paint;
// PDF treats a shader as a color, so we only set one or the other.
SkRefPtr<SkPDFShader> pdfShader;
const SkShader* shader = newPaint.getShader();
if (shader) {
// PDF positions patterns relative to the initial transform, so
// we need to apply the current transform to the shader parameters.
SkMatrix transform = fGraphicStack[fGraphicStackIndex].fTransform;
if (fFlipOrigin == kFlip_OriginTransform) {
transform.postScale(1, -1);
transform.postTranslate(0, fHeight);
}
// PDF doesn't support kClamp_TileMode, so we simulate it by making
// a pattern the size of the drawing service.
SkIRect bounds = fGraphicStack[fGraphicStackIndex].fClip.getBounds();
pdfShader = SkPDFShader::getPDFShader(*shader, transform, bounds);
SkSafeUnref(pdfShader.get()); // getShader and SkRefPtr both took a ref
// A color shader is treated as an invalid shader so we don't have
// to set a shader just for a color.
if (pdfShader.get() == NULL) {
newPaint.setColor(0);
// Check for a color shader.
SkShader::GradientInfo gradientInfo;
SkColor gradientColor;
gradientInfo.fColors = &gradientColor;
gradientInfo.fColorOffsets = NULL;
gradientInfo.fColorCount = 1;
if (shader->asAGradient(&gradientInfo) ==
SkShader::kColor_GradientType) {
newPaint.setColor(gradientColor);
}
}
}
if (pdfShader) {
// pdfShader has been canonicalized so we can directly compare
// pointers.
if (fGraphicStack[fGraphicStackIndex].fShader != pdfShader.get()) {
int resourceIndex = fShaderResources.find(pdfShader.get());
if (resourceIndex < 0) {
resourceIndex = fShaderResources.count();
fShaderResources.push(pdfShader.get());
pdfShader->ref();
}
fContent.writeText("/Pattern CS /Pattern cs /P");
fContent.writeDecAsText(resourceIndex);
fContent.writeText(" SCN /P");
fContent.writeDecAsText(resourceIndex);
fContent.writeText(" scn\n");
fGraphicStack[fGraphicStackIndex].fShader = pdfShader.get();
}
} else {
SkColor newColor = newPaint.getColor();
newColor = SkColorSetA(newColor, 0xFF);
if (fGraphicStack[fGraphicStackIndex].fShader ||
fGraphicStack[fGraphicStackIndex].fColor != newColor) {
emitPDFColor(newColor, &fContent);
fContent.writeText("RG ");
emitPDFColor(newColor, &fContent);
fContent.writeText("rg\n");
fGraphicStack[fGraphicStackIndex].fColor = newColor;
fGraphicStack[fGraphicStackIndex].fShader = NULL;
}
}
SkRefPtr<SkPDFGraphicState> newGraphicState =
SkPDFGraphicState::getGraphicStateForPaint(newPaint);
newGraphicState->unref(); // getGraphicState and SkRefPtr both took a ref.
// newGraphicState has been canonicalized so we can directly compare
// pointers.
if (fGraphicStack[fGraphicStackIndex].fGraphicState !=
newGraphicState.get()) {
int resourceIndex = fGraphicStateResources.find(newGraphicState.get());
if (resourceIndex < 0) {
resourceIndex = fGraphicStateResources.count();
fGraphicStateResources.push(newGraphicState.get());
newGraphicState->ref();
}
fContent.writeText("/G");
fContent.writeDecAsText(resourceIndex);
fContent.writeText(" gs\n");
fGraphicStack[fGraphicStackIndex].fGraphicState = newGraphicState.get();
}
if (forText) {
if (fGraphicStack[fGraphicStackIndex].fTextScaleX !=
newPaint.getTextScaleX()) {
SkScalar scale = newPaint.getTextScaleX();
SkScalar pdfScale = SkScalarMul(scale, SkIntToScalar(100));
SkPDFScalar::Append(pdfScale, &fContent);
fContent.writeText(" Tz\n");
fGraphicStack[fGraphicStackIndex].fTextScaleX = scale;
}
if (fGraphicStack[fGraphicStackIndex].fTextFill !=
newPaint.getStyle()) {
SK_COMPILE_ASSERT(SkPaint::kFill_Style == 0, enum_must_match_value);
SK_COMPILE_ASSERT(SkPaint::kStroke_Style == 1,
enum_must_match_value);
SK_COMPILE_ASSERT(SkPaint::kStrokeAndFill_Style == 2,
enum_must_match_value);
fContent.writeDecAsText(newPaint.getStyle());
fContent.writeText(" Tr\n");
fGraphicStack[fGraphicStackIndex].fTextFill = newPaint.getStyle();
}
}
}
// Even with kEntirePaint_Bits, we always ensure that the master paint's
// text-encoding is respected, since that controls how we interpret the
// text/length parameters of a draw[Pos]Text call.
void SkLayerDrawLooper::ApplyInfo(SkPaint* dst, const SkPaint& src,
const LayerInfo& info) {
uint32_t mask = info.fFlagsMask;
dst->setFlags((dst->getFlags() & ~mask) | (src.getFlags() & mask));
dst->setColor(xferColor(src.getColor(), dst->getColor(), info.fColorMode));
BitFlags bits = info.fPaintBits;
SkPaint::TextEncoding encoding = dst->getTextEncoding();
if (0 == bits) {
return;
}
if (kEntirePaint_Bits == bits) {
// we've already computed these, so save it from the assignment
uint32_t f = dst->getFlags();
SkColor c = dst->getColor();
*dst = src;
dst->setFlags(f);
dst->setColor(c);
dst->setTextEncoding(encoding);
return;
}
if (bits & kStyle_Bit) {
dst->setStyle(src.getStyle());
dst->setStrokeWidth(src.getStrokeWidth());
dst->setStrokeMiter(src.getStrokeMiter());
dst->setStrokeCap(src.getStrokeCap());
dst->setStrokeJoin(src.getStrokeJoin());
}
if (bits & kTextSkewX_Bit) {
dst->setTextSkewX(src.getTextSkewX());
}
if (bits & kPathEffect_Bit) {
dst->setPathEffect(src.getPathEffect());
}
if (bits & kMaskFilter_Bit) {
dst->setMaskFilter(src.getMaskFilter());
}
if (bits & kShader_Bit) {
dst->setShader(src.getShader());
}
if (bits & kColorFilter_Bit) {
dst->setColorFilter(src.getColorFilter());
}
if (bits & kXfermode_Bit) {
dst->setXfermode(src.getXfermode());
}
// we don't override these
#if 0
dst->setTypeface(src.getTypeface());
dst->setTextSize(src.getTextSize());
dst->setTextScaleX(src.getTextScaleX());
dst->setRasterizer(src.getRasterizer());
dst->setLooper(src.getLooper());
dst->setTextEncoding(src.getTextEncoding());
dst->setHinting(src.getHinting());
#endif
}
void SkFlatPaint::dump() const {
SkPaint defaultPaint;
SkFlattenableReadBuffer buffer(fPaintData);
SkTypeface* typeface = (SkTypeface*) buffer.readPtr();
char pBuffer[DUMP_BUFFER_SIZE];
char* bufferPtr = pBuffer;
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"paint: ");
if (typeface != defaultPaint.getTypeface())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"typeface:%p ", typeface);
SkScalar textSize = buffer.readScalar();
if (textSize != defaultPaint.getTextSize())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"textSize:%g ", SkScalarToFloat(textSize));
SkScalar textScaleX = buffer.readScalar();
if (textScaleX != defaultPaint.getTextScaleX())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"textScaleX:%g ", SkScalarToFloat(textScaleX));
SkScalar textSkewX = buffer.readScalar();
if (textSkewX != defaultPaint.getTextSkewX())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"textSkewX:%g ", SkScalarToFloat(textSkewX));
const SkPathEffect* pathEffect = (const SkPathEffect*) buffer.readFlattenable();
if (pathEffect != defaultPaint.getPathEffect())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"pathEffect:%p ", pathEffect);
SkDELETE(pathEffect);
const SkShader* shader = (const SkShader*) buffer.readFlattenable();
if (shader != defaultPaint.getShader())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"shader:%p ", shader);
SkDELETE(shader);
const SkXfermode* xfermode = (const SkXfermode*) buffer.readFlattenable();
if (xfermode != defaultPaint.getXfermode())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"xfermode:%p ", xfermode);
SkDELETE(xfermode);
const SkMaskFilter* maskFilter = (const SkMaskFilter*) buffer.readFlattenable();
if (maskFilter != defaultPaint.getMaskFilter())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"maskFilter:%p ", maskFilter);
SkDELETE(maskFilter);
const SkColorFilter* colorFilter = (const SkColorFilter*) buffer.readFlattenable();
if (colorFilter != defaultPaint.getColorFilter())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"colorFilter:%p ", colorFilter);
SkDELETE(colorFilter);
const SkRasterizer* rasterizer = (const SkRasterizer*) buffer.readFlattenable();
if (rasterizer != defaultPaint.getRasterizer())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"rasterizer:%p ", rasterizer);
SkDELETE(rasterizer);
const SkDrawLooper* drawLooper = (const SkDrawLooper*) buffer.readFlattenable();
if (drawLooper != defaultPaint.getLooper())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"drawLooper:%p ", drawLooper);
SkDELETE(drawLooper);
unsigned color = buffer.readU32();
if (color != defaultPaint.getColor())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"color:0x%x ", color);
SkScalar strokeWidth = buffer.readScalar();
if (strokeWidth != defaultPaint.getStrokeWidth())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"strokeWidth:%g ", SkScalarToFloat(strokeWidth));
SkScalar strokeMiter = buffer.readScalar();
if (strokeMiter != defaultPaint.getStrokeMiter())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"strokeMiter:%g ", SkScalarToFloat(strokeMiter));
unsigned flags = buffer.readU16();
if (flags != defaultPaint.getFlags())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"flags:0x%x ", flags);
int align = buffer.readU8();
if (align != defaultPaint.getTextAlign())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"align:0x%x ", align);
int strokeCap = buffer.readU8();
if (strokeCap != defaultPaint.getStrokeCap())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"strokeCap:0x%x ", strokeCap);
int strokeJoin = buffer.readU8();
if (strokeJoin != defaultPaint.getStrokeJoin())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"align:0x%x ", strokeJoin);
int style = buffer.readU8();
if (style != defaultPaint.getStyle())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"style:0x%x ", style);
int textEncoding = buffer.readU8();
if (textEncoding != defaultPaint.getTextEncoding())
bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
"textEncoding:0x%x ", textEncoding);
SkDebugf("%s\n", pBuffer);
}
