void draw(SkCanvas* canvas) {
SkPaint paint;
paint.setTextSize(128);
SkPath path, path2;
paint.getTextPath("A", 1, 60, 100, &path);
paint.getTextPath("Z", 1, 60, 100, &path2);
SkPoint pt, pt2;
path.getLastPt(&pt);
path2.getLastPt(&pt2);
path.setLastPt(pt2);
path2.setLastPt(pt);
canvas->drawPath(path, paint);
canvas->drawPath(path2, paint);
}
static void lettersToBitmap2(SkBitmap* dst, const char chars[],
const SkPaint& original, SkBitmap::Config config) {
SkPath path;
SkScalar x = 0;
SkScalar width;
SkPath p;
for (size_t i = 0; i < strlen(chars); i++) {
original.getTextPath(&chars[i], 1, x, 0, &p);
path.addPath(p);
original.getTextWidths(&chars[i], 1, &width);
x += width;
}
SkRect bounds = path.getBounds();
SkScalar sw = -original.getStrokeWidth();
bounds.inset(sw, sw);
path.offset(-bounds.fLeft, -bounds.fTop);
bounds.offset(-bounds.fLeft, -bounds.fTop);
int w = SkScalarRound(bounds.width());
int h = SkScalarRound(bounds.height());
SkPaint paint(original);
paint.setAntiAlias(true);
paint.setXfermodeMode(SkXfermode::kDstATop_Mode);
paint.setColor(original.getColor());
paint.setStyle(SkPaint::kStroke_Style);
dst->setConfig(config, w, h);
dst->allocPixels();
dst->eraseColor(SK_ColorWHITE);
SkCanvas canvas(*dst);
canvas.drawPath(path, paint);
}
virtual void onDraw(SkCanvas* canvas) {
// explicitly add spaces, to test a prev. bug
const char* text = "Ham bur ge fons";
int len = SkToInt(strlen(text));
SkPath path;
SkPaint paint;
paint.setAntiAlias(true);
paint.setTextSize(SkIntToScalar(48));
canvas->translate(SkIntToScalar(10), SkIntToScalar(64));
canvas->drawText(text, len, 0, 0, paint);
paint.getTextPath(text, len, 0, 0, &path);
strokePath(canvas, path);
path.reset();
SkAutoTArray<SkPoint> pos(len);
SkAutoTArray<SkScalar> widths(len);
paint.getTextWidths(text, len, &widths[0]);
SkLCGRandom rand;
SkScalar x = SkIntToScalar(20);
SkScalar y = SkIntToScalar(100);
for (int i = 0; i < len; ++i) {
pos[i].set(x, y + rand.nextSScalar1() * 24);
x += widths[i];
}
canvas->translate(0, SkIntToScalar(64));
canvas->drawPosText(text, len, &pos[0], paint);
paint.getPosTextPath(text, len, &pos[0], &path);
strokePath(canvas, path);
}
virtual void onDraw(SkCanvas* canvas) {
if (false) test_rev(canvas); // avoid bit rot, suppress warning
SkRect r = { 10, 10, 100, 60 };
SkPath path;
path.addRect(r); test_rev(canvas, path);
canvas->translate(0, 100);
path.offset(20, 20);
path.addRect(r); test_rev(canvas, path);
canvas->translate(0, 100);
path.reset();
path.moveTo(10, 10); path.lineTo(30, 30);
path.addOval(r);
r.offset(50, 20);
path.addOval(r);
test_rev(canvas, path);
SkPaint paint;
paint.setTextSize(SkIntToScalar(100));
SkTypeface* hira = SkTypeface::CreateFromName("Hiragino Maru Gothic Pro", SkTypeface::kNormal);
SkSafeUnref(paint.setTypeface(hira));
path.reset();
paint.getTextPath("e", 1, 50, 50, &path);
canvas->translate(0, 100);
test_rev(canvas, path);
}
static HB_Error getOutlinePoint(HB_Font hbFont, HB_Glyph glyph, int flags,
hb_uint32 index, HB_Fixed* xPos, HB_Fixed* yPos,
hb_uint32* resultingNumPoints) {
SkHarfBuzzFont* font = reinterpret_cast<SkHarfBuzzFont*>(hbFont->userData);
SkPaint paint;
font->setupPaint(&paint);
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
if (flags & HB_ShaperFlag_UseDesignMetrics) {
paint.setHinting(SkPaint::kNo_Hinting);
}
SkPath path;
uint16_t glyph16 = SkToU16(glyph);
paint.getTextPath(&glyph16, sizeof(glyph16), 0, 0, &path);
int numPoints = path.countPoints();
if (index >= numPoints) {
return HB_Err_Invalid_SubTable;
}
SkPoint pt = path.getPoint(index);
*xPos = SkScalarToHarfbuzzFixed(pt.fX);
*yPos = SkScalarToHarfbuzzFixed(pt.fY);
*resultingNumPoints = numPoints;
return HB_Err_Ok;
}
static HB_Error getOutlinePoint(HB_Font hbFont, HB_Glyph glyph, int flags, hb_uint32 point, HB_Fixed* xPos, HB_Fixed* yPos, hb_uint32* resultingNumPoints)
{
FontPlatformData* font = reinterpret_cast<FontPlatformData*>(hbFont->userData);
SkPaint paint;
if (flags & HB_ShaperFlag_UseDesignMetrics)
return HB_Err_Invalid_Argument; // This is requesting pre-hinted positions. We can't support this.
font->setupPaint(&paint);
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
uint16_t glyph16 = glyph;
SkPath path;
paint.getTextPath(&glyph16, sizeof(glyph16), 0, 0, &path);
int numPoints = path.getPoints(0, 0);
if (point >= static_cast<unsigned>(numPoints))
return HB_Err_Invalid_SubTable;
SkPoint* points = reinterpret_cast<SkPoint*>(fastMalloc(sizeof(SkPoint) * (point + 1)));
if (!points)
return HB_Err_Invalid_SubTable;
// Skia does let us get a single point from the path.
path.getPoints(points, point + 1);
*xPos = SkiaScalarToHarfbuzzFixed(points[point].fX);
*yPos = SkiaScalarToHarfbuzzFixed(points[point].fY);
*resultingNumPoints = numPoints;
fastFree(points);
return HB_Err_Ok;
}
static HB_Error getOutlinePoint(HB_Font hbFont, HB_Glyph glyph, int flags, hb_uint32 point,
HB_Fixed* xPos, HB_Fixed* yPos, hb_uint32* resultingNumPoints)
{
if (flags & HB_ShaperFlag_UseDesignMetrics)
// This is requesting pre-hinted positions. We can't support this.
return HB_Err_Invalid_Argument;
SkPaint* paint = static_cast<SkPaint*>(hbFont->userData);
paint->setTextEncoding(SkPaint::kGlyphID_TextEncoding);
uint16_t glyph16 = glyph;
SkPath path;
paint->getTextPath(&glyph16, sizeof(glyph16), 0, 0, &path);
uint32_t numPoints = path.getPoints(0, 0);
if (point >= numPoints)
return HB_Err_Invalid_SubTable;
SkPoint* points = static_cast<SkPoint*>(malloc(sizeof(SkPoint) * (point + 1)));
if (!points)
return HB_Err_Invalid_SubTable;
// Skia does let us get a single point from the path.
path.getPoints(points, point + 1);
*xPos = SkScalarToHBFixed(points[point].fX);
*yPos = SkScalarToHBFixed(points[point].fY);
*resultingNumPoints = numPoints;
delete points;
return HB_Err_Ok;
}
void SkTextToPath::onEndElement(SkAnimateMaker& maker) {
if (paint == NULL || path == NULL || text == NULL) {
// !!! add error message here
maker.setErrorCode(SkDisplayXMLParserError::kErrorInAttributeValue);
return;
}
SkPaint realPaint;
paint->setupPaint(&realPaint);
realPaint.getTextPath(text->getText(), text->getSize(), text->x,
text->y, &path->getPath());
}
void draw(SkCanvas* canvas) {
SkPaint paint;
paint.setTextSize(80);
SkPath path, path2;
paint.getTextPath("ABC", 3, 20, 80, &path);
path.offset(20, 20, &path2);
Op(path, path2, SkPathOp::kDifference_SkPathOp, &path);
path.addPath(path2);
paint.setStyle(SkPaint::kStroke_Style);
canvas->drawPath(path, paint);
}
static inline void getSkiaBoundsForGlyph(SkPaint& paint, Glyph glyph, SkRect& bounds)
{
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
SkPath path;
paint.getTextPath(&glyph, sizeof(glyph), 0, 0, &path);
bounds = path.getBounds();
if (!paint.isSubpixelText()) {
SkIRect ir;
bounds.round(&ir);
bounds.set(ir);
}
}
static void drawdots(SkCanvas* canvas, const SkPaint& orig) {
SkTDArray<SkPoint> pts;
SkPathEffect* pe = makepe(0, &pts);
SkScalar width = -1;
SkPath path, dstPath;
orig.getTextPath("9", 1, 0, 0, &path);
pe->filterPath(&dstPath, path, &width);
SkPaint p;
p.setAntiAlias(true);
p.setStrokeWidth(10);
p.setColor(SK_ColorRED);
canvas->drawPoints(SkCanvas::kPoints_PointMode, pts.count(), pts.begin(),
p);
}
void draw(SkCanvas* canvas) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setTextSize(256);
SkPath asterisk, path;
paint.getTextPath("*", 1, 50, 192, &asterisk);
SkPath::Iter iter(asterisk, true);
SkPoint start[4], pts[4];
iter.next(start); // skip moveTo
iter.next(start); // first quadTo
path.moveTo((start[0] + start[1]) * 0.5f);
while (SkPath::kClose_Verb != iter.next(pts)) {
path.quadTo(pts[0], (pts[0] + pts[1]) * 0.5f);
}
path.quadTo(start[0], (start[0] + start[1]) * 0.5f);
canvas->drawPath(path, paint);
}
static void output_path_data(const SkPaint& paint, const char* used,
int emSize, SkString* ptsOut, SkTDArray<SkPath::Verb>* verbs,
SkTDArray<unsigned>* charCodes, SkTDArray<SkScalar>* widths) {
while (*used) {
SkUnichar index = SkUTF8_NextUnichar(&used);
SkPath path;
paint.getTextPath((const void*) &index, 2, 0, 0, &path);
SkPath::RawIter iter(path);
SkPath::Verb verb;
SkPoint pts[4];
while ((verb = iter.next(pts)) != SkPath::kDone_Verb) {
*verbs->append() = verb;
switch (verb) {
case SkPath::kMove_Verb:
output_points(&pts[0], emSize, 1, ptsOut);
break;
case SkPath::kLine_Verb:
output_points(&pts[1], emSize, 1, ptsOut);
break;
case SkPath::kQuad_Verb:
output_points(&pts[1], emSize, 2, ptsOut);
break;
case SkPath::kCubic_Verb:
output_points(&pts[1], emSize, 3, ptsOut);
break;
case SkPath::kClose_Verb:
break;
default:
SkDEBUGFAIL("bad verb");
SkASSERT(0);
}
}
*verbs->append() = SkPath::kDone_Verb;
*charCodes->append() = index;
SkScalar width;
SkDEBUGCODE(int charCount =) paint.getTextWidths((const void*) &index, 2, &width);
SkASSERT(charCount == 1);
// SkASSERT(floor(width) == width); // not true for Hiragino Maru Gothic Pro
*widths->append() = width;
}
}
static void draw_vector_logo(SkCanvas* canvas, const SkRect& viewBox) {
constexpr char kSkiaStr[] = "SKIA";
constexpr SkScalar kGradientPad = .1f;
constexpr SkScalar kVerticalSpacing = 0.25f;
constexpr SkScalar kAccentScale = 1.20f;
SkPaint paint;
paint.setAntiAlias(true);
paint.setSubpixelText(true);
paint.setFakeBoldText(true);
sk_tool_utils::set_portable_typeface(&paint);
SkPath path;
SkRect iBox, skiBox, skiaBox;
paint.getTextPath("SKI", 3, 0, 0, &path);
TightBounds(path, &skiBox);
paint.getTextPath("I", 1, 0, 0, &path);
TightBounds(path, &iBox);
iBox.offsetTo(skiBox.fRight - iBox.width(), iBox.fTop);
const size_t textLen = strlen(kSkiaStr);
paint.getTextPath(kSkiaStr, textLen, 0, 0, &path);
TightBounds(path, &skiaBox);
skiaBox.outset(0, 2 * iBox.width() * (kVerticalSpacing + 1));
const SkScalar accentSize = iBox.width() * kAccentScale;
const SkScalar underlineY = iBox.bottom() +
(kVerticalSpacing + SkScalarSqrt(3) / 2) * accentSize;
SkMatrix m;
m.setRectToRect(skiaBox, viewBox, SkMatrix::kFill_ScaleToFit);
SkAutoCanvasRestore acr(canvas, true);
canvas->concat(m);
canvas->drawCircle(iBox.centerX(),
iBox.y() - (0.5f + kVerticalSpacing) * accentSize,
accentSize / 2,
paint);
path.reset();
path.moveTo(iBox.centerX() - accentSize / 2, iBox.bottom() + kVerticalSpacing * accentSize);
path.rLineTo(accentSize, 0);
path.lineTo(iBox.centerX(), underlineY);
canvas->drawPath(path, paint);
SkRect underlineRect = SkRect::MakeLTRB(iBox.centerX() - iBox.width() * accentSize * 3,
underlineY,
iBox.centerX(),
underlineY + accentSize / 10);
const SkPoint pts1[] = { SkPoint::Make(underlineRect.x(), 0),
SkPoint::Make(iBox.centerX(), 0) };
const SkScalar pos1[] = { 0, 0.75f };
const SkColor colors1[] = { SK_ColorTRANSPARENT, SK_ColorBLACK };
SkASSERT(SK_ARRAY_COUNT(pos1) == SK_ARRAY_COUNT(colors1));
paint.setShader(SkGradientShader::MakeLinear(pts1, colors1, pos1, SK_ARRAY_COUNT(pos1),
SkShader::kClamp_TileMode));
canvas->drawRect(underlineRect, paint);
const SkPoint pts2[] = { SkPoint::Make(iBox.x() - iBox.width() * kGradientPad, 0),
SkPoint::Make(iBox.right() + iBox.width() * kGradientPad, 0) };
const SkScalar pos2[] = { 0, .01f, 1.0f/3, 1.0f/3, 2.0f/3, 2.0f/3, .99f, 1 };
const SkColor colors2[] = {
SK_ColorBLACK,
0xffca5139,
0xffca5139,
0xff8dbd53,
0xff8dbd53,
0xff5460a5,
0xff5460a5,
SK_ColorBLACK
};
SkASSERT(SK_ARRAY_COUNT(pos2) == SK_ARRAY_COUNT(colors2));
paint.setShader(SkGradientShader::MakeLinear(pts2, colors2, pos2, SK_ARRAY_COUNT(pos2),
SkShader::kClamp_TileMode));
canvas->drawText(kSkiaStr, textLen, 0, 0, paint);
}
void onDrawContent(SkCanvas* canvas) override {
SkPath path;
SkScalar width = fWidth;
if (fCubicButton.fEnabled) {
path.moveTo(fPts[0]);
path.cubicTo(fPts[1], fPts[2], fPts[3]);
setForGeometry();
draw_stroke(canvas, path, width, 950, false);
}
if (fConicButton.fEnabled) {
path.moveTo(fPts[4]);
path.conicTo(fPts[5], fPts[6], fWeight);
setForGeometry();
draw_stroke(canvas, path, width, 950, false);
}
if (fQuadButton.fEnabled) {
path.reset();
path.moveTo(fPts[7]);
path.quadTo(fPts[8], fPts[9]);
setForGeometry();
draw_stroke(canvas, path, width, 950, false);
}
if (fRRectButton.fEnabled) {
SkScalar rad = 32;
SkRect r;
r.set(&fPts[10], 2);
path.reset();
SkRRect rr;
rr.setRectXY(r, rad, rad);
path.addRRect(rr);
setForGeometry();
draw_stroke(canvas, path, width, 950, false);
path.reset();
SkRRect rr2;
rr.inset(width/2, width/2, &rr2);
path.addRRect(rr2, SkPath::kCCW_Direction);
rr.inset(-width/2, -width/2, &rr2);
path.addRRect(rr2, SkPath::kCW_Direction);
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(0x40FF8844);
canvas->drawPath(path, paint);
}
if (fCircleButton.fEnabled) {
path.reset();
SkRect r;
r.set(&fPts[12], 2);
path.addOval(r);
setForGeometry();
if (fCircleButton.fFill) {
draw_fill(canvas, r, width);
} else {
draw_stroke(canvas, path, width, 950, false);
}
}
if (fTextButton.fEnabled) {
path.reset();
SkPaint paint;
paint.setAntiAlias(true);
paint.setTextSize(fTextSize);
paint.getTextPath(fText.c_str(), fText.size(), 0, fTextSize, &path);
setForText();
draw_stroke(canvas, path, width * fWidthScale / fTextSize, fTextSize, true);
}
if (fAnimate) {
fWidth += fDWidth;
if (fDWidth > 0 && fWidth > kWidthMax) {
fDWidth = -fDWidth;
} else if (fDWidth < 0 && fWidth < kWidthMin) {
fDWidth = -fDWidth;
}
}
setAsNeeded();
if (fConicButton.fEnabled) {
draw_control(canvas, fWeightControl, fWeight, 0, 5, "weight");
}
#ifdef SK_DEBUG
draw_control(canvas, fErrorControl, gDebugStrokerError, kStrokerErrorMin, kStrokerErrorMax,
"error");
#endif
draw_control(canvas, fWidthControl, fWidth * fWidthScale, kWidthMin * fWidthScale,
kWidthMax * fWidthScale, "width");
draw_button(canvas, fQuadButton);
draw_button(canvas, fCubicButton);
draw_button(canvas, fConicButton);
draw_button(canvas, fRRectButton);
draw_button(canvas, fCircleButton);
draw_button(canvas, fTextButton);
this->inval(NULL);
}
static int count_char_points(const SkPaint& paint, char c) {
SkPath path;
paint.getTextPath(&c, 1, 0, 0, &path);
return path.getPoints(NULL, 0);
}