virtual void onDraw(SkCanvas* canvas) {
SkPoint pts[2] = {
{ 0, 0 },
{ SkIntToScalar(100), SkIntToScalar(100) }
};
SkShader::TileMode tm = SkShader::kClamp_TileMode;
SkRect r = { 0, 0, SkIntToScalar(100), SkIntToScalar(100) };
SkPaint paint;
paint.setAntiAlias(true);
canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
for (size_t i = 0; i < SK_ARRAY_COUNT(gGradData); i++) {
canvas->save();
for (size_t j = 0; j < SK_ARRAY_COUNT(gGradMakers); j++) {
SkShader* shader = gGradMakers[j](pts, gGradData[i], tm, NULL);
// apply an increasing y perspective as we move to the right
SkMatrix perspective;
perspective.setIdentity();
perspective.setPerspY(SkScalarDiv(SkIntToScalar((unsigned) i+1),
SkIntToScalar(500)));
perspective.setSkewX(SkScalarDiv(SkIntToScalar((unsigned) i+1),
SkIntToScalar(10)));
shader->setLocalMatrix(perspective);
paint.setShader(shader);
canvas->drawRect(r, paint);
shader->unref();
canvas->translate(0, SkIntToScalar(120));
}
canvas->restore();
canvas->translate(SkIntToScalar(120), 0);
}
}
static IntersectionType intersection(const SkPoint& p1, const SkPoint& p2,
const SkPoint& p3, const SkPoint& p4,
SkPoint& res) {
// Store the values for fast access and easy
// equations-to-code conversion
SkScalar x1 = p1.x(), x2 = p2.x(), x3 = p3.x(), x4 = p4.x();
SkScalar y1 = p1.y(), y2 = p2.y(), y3 = p3.y(), y4 = p4.y();
SkScalar d = SkScalarMul(x1 - x2, y3 - y4) - SkScalarMul(y1 - y2, x3 - x4);
// If d is zero, there is no intersection
if (SkScalarNearlyZero(d)) {
return kNone_IntersectionType;
}
// Get the x and y
SkScalar pre = SkScalarMul(x1, y2) - SkScalarMul(y1, x2),
post = SkScalarMul(x3, y4) - SkScalarMul(y3, x4);
// Compute the point of intersection
res.set(SkScalarDiv(SkScalarMul(pre, x3 - x4) - SkScalarMul(x1 - x2, post), d),
SkScalarDiv(SkScalarMul(pre, y3 - y4) - SkScalarMul(y1 - y2, post), d));
// Check if the x and y coordinates are within both lines
return (res.x() < GrMin(x1, x2) || res.x() > GrMax(x1, x2) ||
res.x() < GrMin(x3, x4) || res.x() > GrMax(x3, x4) ||
res.y() < GrMin(y1, y2) || res.y() > GrMax(y1, y2) ||
res.y() < GrMin(y3, y4) || res.y() > GrMax(y3, y4)) ?
kOut_IntersectionType : kIn_IntersectionType;
}
void draw(SkCanvas* canvas,
const SkRect& rect,
const SkSize& deviceSize,
SkPaint::FilterLevel filterLevel,
SkImageFilter* input = NULL) {
SkRect dstRect;
canvas->getTotalMatrix().mapRect(&dstRect, rect);
canvas->save();
SkScalar deviceScaleX = SkScalarDiv(deviceSize.width(), dstRect.width());
SkScalar deviceScaleY = SkScalarDiv(deviceSize.height(), dstRect.height());
canvas->translate(rect.x(), rect.y());
canvas->scale(deviceScaleX, deviceScaleY);
canvas->translate(-rect.x(), -rect.y());
SkMatrix matrix;
matrix.setScale(SkScalarInvert(deviceScaleX),
SkScalarInvert(deviceScaleY));
SkAutoTUnref<SkImageFilter> imageFilter(
SkMatrixImageFilter::Create(matrix, filterLevel, input));
SkPaint filteredPaint;
filteredPaint.setImageFilter(imageFilter.get());
canvas->saveLayer(&rect, &filteredPaint);
SkPaint paint;
paint.setColor(0xFF00FF00);
SkRect ovalRect = rect;
ovalRect.inset(SkIntToScalar(4), SkIntToScalar(4));
canvas->drawOval(ovalRect, paint);
canvas->restore(); // for saveLayer
canvas->restore();
}
static SkScalar RGB_to_HSV(SkColor color, HSV_Choice choice) {
SkScalar red = SkIntToScalar(SkColorGetR(color));
SkScalar green = SkIntToScalar(SkColorGetG(color));
SkScalar blue = SkIntToScalar(SkColorGetB(color));
SkScalar min = SkMinScalar(SkMinScalar(red, green), blue);
SkScalar value = SkMaxScalar(SkMaxScalar(red, green), blue);
if (choice == kGetValue)
return value/255;
SkScalar delta = value - min;
SkScalar saturation = value == 0 ? 0 : SkScalarDiv(delta, value);
if (choice == kGetSaturation)
return saturation;
SkScalar hue;
if (saturation == 0)
hue = 0;
else {
SkScalar part60 = SkScalarDiv(60 * SK_Scalar1, delta);
if (red == value) {
hue = SkScalarMul(green - blue, part60);
if (hue < 0)
hue += 360 * SK_Scalar1;
}
else if (green == value)
hue = 120 * SK_Scalar1 + SkScalarMul(blue - red, part60);
else // blue == value
hue = 240 * SK_Scalar1 + SkScalarMul(red - green, part60);
}
SkASSERT(choice == kGetHue);
return hue;
}
void SkGridView::onSizeChange()
{
fScrollBar->setHeight(this->height());
fScrollBar->setLoc(this->locX() + this->width() - fScrollBar->width(), 0);
if (fCellSize.equals(0, 0))
{
fVisibleCount.set(0, 0);
return;
}
SkScalar rows = SkScalarDiv(this->height(), fCellSize.fY);
SkScalar cols = SkScalarDiv(this->width(), fCellSize.fX);
int y = SkScalarFloor(rows);
int x = SkScalarFloor(cols);
y = check_count(y, rows);
x = check_count(x, cols);
if (!fVisibleCount.equals(x, y))
{
fVisibleCount.set(x, y);
this->ensureSelectionIsVisible();
// this->dirtyStrCache();
}
}
bool SkXRayCrossesLine(const SkXRay& pt, const SkPoint pts[2]) {
// Determine quick discards.
// Consider query line going exactly through point 0 to not
// intersect, for symmetry with SkXRayCrossesMonotonicCubic.
if (pt.fY == pts[0].fY)
return false;
if (pt.fY < pts[0].fY && pt.fY < pts[1].fY)
return false;
if (pt.fY > pts[0].fY && pt.fY > pts[1].fY)
return false;
if (pt.fX > pts[0].fX && pt.fX > pts[1].fX)
return false;
// Determine degenerate cases
if (SkScalarNearlyZero(pts[0].fY - pts[1].fY))
return false;
if (SkScalarNearlyZero(pts[0].fX - pts[1].fX))
// We've already determined the query point lies within the
// vertical range of the line segment.
return pt.fX <= pts[0].fX;
// Full line segment evaluation
SkScalar delta_y = pts[1].fY - pts[0].fY;
SkScalar delta_x = pts[1].fX - pts[0].fX;
SkScalar slope = SkScalarDiv(delta_y, delta_x);
SkScalar b = pts[0].fY - SkScalarMul(slope, pts[0].fX);
// Solve for x coordinate at y = pt.fY
SkScalar x = SkScalarDiv(pt.fY - b, slope);
return pt.fX <= x;
}
void SkRRect::setRectXY(const SkRect& rect, SkScalar xRad, SkScalar yRad) {
if (rect.isEmpty() || !rect.isFinite()) {
this->setEmpty();
return;
}
if (!SkScalarsAreFinite(xRad, yRad)) {
xRad = yRad = 0; // devolve into a simple rect
}
if (xRad <= 0 || yRad <= 0) {
// all corners are square in this case
this->setRect(rect);
return;
}
if (rect.width() < xRad+xRad || rect.height() < yRad+yRad) {
SkScalar scale = SkMinScalar(SkScalarDiv(rect.width(), xRad + xRad),
SkScalarDiv(rect.height(), yRad + yRad));
SkASSERT(scale < SK_Scalar1);
xRad = SkScalarMul(xRad, scale);
yRad = SkScalarMul(yRad, scale);
}
fRect = rect;
for (int i = 0; i < 4; ++i) {
fRadii[i].set(xRad, yRad);
}
fType = kSimple_Type;
if (xRad >= SkScalarHalf(fRect.width()) && yRad >= SkScalarHalf(fRect.height())) {
fType = kOval_Type;
// TODO: assert that all the x&y radii are already W/2 & H/2
}
SkDEBUGCODE(this->validate();)
}
void SkRRect::setNinePatch(const SkRect& rect, SkScalar leftRad, SkScalar topRad,
SkScalar rightRad, SkScalar bottomRad) {
if (rect.isEmpty() || !rect.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 > rect.width()) {
scale = SkScalarDiv(rect.width(), leftRad + rightRad);
}
if (topRad + bottomRad > rect.height()) {
scale = SkMinScalar(scale, SkScalarDiv(rect.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(rect.width()) && topRad >= SkScalarHalf(rect.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;
}
fRect = rect;
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();)
}
virtual void onDraw(SkCanvas* canvas) {
SkMatrix perspective;
perspective.setIdentity();
perspective.setPerspY(SkScalarDiv(SK_Scalar1, SkIntToScalar(1000)));
perspective.setSkewX(SkScalarDiv(SkIntToScalar(8), SkIntToScalar(25)));
canvas->concat(perspective);
INHERITED::onDraw(canvas);
}
virtual Click* onFindClickHandler(SkScalar x, SkScalar y) {
int ix = (int)(SkScalarDiv(x * N, W));
int iy = (int)(SkScalarDiv(y * N, H));
if (ix >= 0 && iy >= 0) {
SkEvent evt("set-curr-index");
evt.setFast32(iy * N + ix);
this->sendEventToParents(evt);
}
return NULL;
}
void GrGLDisplacementMapEffect::setData(const GrGLProgramDataManager& pdman,
const GrProcessor& proc) {
const GrDisplacementMapEffect& displacementMap = proc.cast<GrDisplacementMapEffect>();
GrTexture* colorTex = displacementMap.texture(1);
SkScalar scaleX = SkScalarDiv(displacementMap.scale().fX, SkIntToScalar(colorTex->width()));
SkScalar scaleY = SkScalarDiv(displacementMap.scale().fY, SkIntToScalar(colorTex->height()));
pdman.set2f(fScaleUni, SkScalarToFloat(scaleX),
colorTex->origin() == kTopLeft_GrSurfaceOrigin ?
SkScalarToFloat(scaleY) : SkScalarToFloat(-scaleY));
fGLDomain.setData(pdman, displacementMap.domain(), colorTex->origin());
}
static SkShader* Make2ConicalOutsideFlip(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = SkScalarDiv(pts[1].fX - pts[0].fX, 10);
SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3);
center0.set(pts[0].fX + radius0, pts[0].fY + radius0);
center1.set(pts[1].fX - radius1, pts[1].fY - radius1);
return SkGradientShader::CreateTwoPointConical(center1, radius1,
center0, radius0,
data.fColors, data.fPos,
data.fCount, tm, 0, &localMatrix);
}
static SkShader* Make2ConicalTouchY(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = SkScalarDiv(pts[1].fX - pts[0].fX, 7);
SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3);
center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center0.set(center1.fX, center1.fY + radius1 - radius0);
return SkGradientShader::CreateTwoPointConical(center0, radius0,
center1, radius1,
data.fColors, data.fPos,
data.fCount, tm, 0, &localMatrix);
}
void SkSet::dump(SkAnimateMaker* maker) {
INHERITED::dump(maker);
if (dur != 1) {
#ifdef SK_CAN_USE_FLOAT
SkDebugf("dur=\"%g\" ", SkScalarToFloat(SkScalarDiv(dur,1000)));
#else
SkDebugf("dur=\"%x\" ", SkScalarDiv(dur,1000));
#endif
}
//don't want double />\n's
SkDebugf("/>\n");
}
virtual void onDraw(SkCanvas* canvas) {
canvas->clear(0x00000000);
SkRect srcRect = SkRect::MakeWH(96, 96);
SkSize deviceSize = SkSize::Make(16, 16);
draw(canvas,
srcRect,
deviceSize,
SkPaint::kNone_FilterLevel);
canvas->translate(srcRect.width() + SkIntToScalar(10), 0);
draw(canvas,
srcRect,
deviceSize,
SkPaint::kLow_FilterLevel);
canvas->translate(srcRect.width() + SkIntToScalar(10), 0);
draw(canvas,
srcRect,
deviceSize,
SkPaint::kMedium_FilterLevel);
canvas->translate(srcRect.width() + SkIntToScalar(10), 0);
draw(canvas,
srcRect,
deviceSize,
SkPaint::kHigh_FilterLevel);
SkBitmap bitmap;
bitmap.allocN32Pixels(16, 16);
bitmap.eraseARGB(0x00, 0x00, 0x00, 0x00);
{
SkBitmapDevice bitmapDevice(bitmap);
SkCanvas bitmapCanvas(&bitmapDevice);
SkPaint paint;
paint.setColor(0xFF00FF00);
SkRect ovalRect = SkRect::MakeWH(16, 16);
ovalRect.inset(SkScalarDiv(2.0f, 3.0f), SkScalarDiv(2.0f, 3.0f));
bitmapCanvas.drawOval(ovalRect, paint);
}
SkRect inRect = SkRect::MakeXYWH(-4, -4, 20, 20);
SkRect outRect = SkRect::MakeXYWH(-24, -24, 120, 120);
SkAutoTUnref<SkBitmapSource> source(SkBitmapSource::Create(bitmap, inRect, outRect));
canvas->translate(srcRect.width() + SkIntToScalar(10), 0);
draw(canvas,
srcRect,
deviceSize,
SkPaint::kHigh_FilterLevel,
source.get());
}
virtual bool onClick(Click* click) {
SkScalar center = this->width()/2;
fSaturation = SkScalarDiv(click->fCurr.fX - center, center/2);
center = this->height()/2;
fAngle = SkScalarDiv(click->fCurr.fY - center, center) * 180;
fDX += click->fCurr.fX - click->fPrev.fX;
fDY += click->fCurr.fY - click->fPrev.fY;
fScale = SkScalarDiv(click->fCurr.fX, this->width());
this->inval(NULL);
return true;
return this->INHERITED::onClick(click);
}
static ECode native_draw(
/* [in] */ SkCanvas* canvas,
/* [in] */ SkRect& bounds,
/* [in] */ const SkBitmap* bitmap,
/* [in] */ ArrayOf<Byte>* chunkObj,
/* [in] */ const SkPaint* paint,
/* [in] */ Int32 destDensity,
/* [in] */ Int32 srcDensity)
{
ECode ec = NOERROR;
Int32 chunkSize = chunkObj->GetLength();
void* storage = chunkObj->GetPayload();
// need to deserialize the chunk
android::Res_png_9patch* chunk = static_cast<android::Res_png_9patch*>(storage);
assert(chunkSize == (Int32)chunk->serializedSize());
// this relies on deserialization being done in place
android::Res_png_9patch::deserialize(chunk);
if (destDensity == srcDensity || destDensity == 0
|| srcDensity == 0) {
// Logger::V(TAG, "Drawing unscaled 9-patch: (%g,%g)-(%g,%g)",
// SkScalarToFloat(bounds.fLeft), SkScalarToFloat(bounds.fTop),
// SkScalarToFloat(bounds.fRight), SkScalarToFloat(bounds.fBottom));
ec = NinePatch_Draw(canvas, bounds, *bitmap, *chunk, paint, NULL);
}
else {
canvas->save();
SkScalar scale = SkFloatToScalar(destDensity / (float)srcDensity);
canvas->translate(bounds.fLeft, bounds.fTop);
canvas->scale(scale, scale);
bounds.fRight = SkScalarDiv(bounds.fRight-bounds.fLeft, scale);
bounds.fBottom = SkScalarDiv(bounds.fBottom-bounds.fTop, scale);
bounds.fLeft = bounds.fTop = 0;
Logger::V(TAG, "Drawing scaled 9-patch: (%g,%g)-(%g,%g) srcDensity=%d destDensity=%d",
SkScalarToFloat(bounds.fLeft), SkScalarToFloat(bounds.fTop),
SkScalarToFloat(bounds.fRight), SkScalarToFloat(bounds.fBottom),
srcDensity, destDensity);
ec = NinePatch_Draw(canvas, bounds, *bitmap, *chunk, paint, NULL);
canvas->restore();
}
return ec;
}
void SkAnimate::dump(SkAnimateMaker* maker) {
INHERITED::dump(maker); //from animateBase
//SkSet inherits from this class
if (getType() != SkType_Set) {
if (fMirror)
SkDebugf("mirror=\"true\" ");
if (fReset)
SkDebugf("reset=\"true\" ");
SkDebugf("dur=\"%g\" ", SkScalarToFloat(SkScalarDiv(dur,1000)));
if (repeat != SK_Scalar1)
SkDebugf("repeat=\"%g\" ", SkScalarToFloat(repeat));
//if (fHasValues)
// SkDebugf("values=\"%s\" ", values);
if (blend.count() != 1 || blend[0] != SK_Scalar1) {
SkDebugf("blend=\"[");
bool firstElem = true;
for (int i = 0; i < blend.count(); i++) {
if (!firstElem)
SkDebugf(",");
firstElem = false;
SkDebugf("%g", SkScalarToFloat(blend[i]));
}
SkDebugf("]\" ");
}
SkDebugf("/>\n");//i assume that if it IS, we will do it separately
}
}
virtual void onDraw(SkCanvas* canvas) {
SkScalar angle = kAngle*SK_ScalarPI + SkScalarHalf(SK_ScalarPI);
SkScalar size = SkIntToScalar(SkMin32(kWidth, kHeight));
SkPoint center = SkPoint::Make(SkScalarHalf(kWidth), SkScalarHalf(kHeight));
SkScalar length = 5;
SkScalar step = angle;
SkPath path;
path.moveTo(center);
while (length < (SkScalarHalf(size) - 10.f))
{
SkPoint rp = SkPoint::Make(length*SkScalarCos(step) + center.fX,
length*SkScalarSin(step) + center.fY);
path.lineTo(rp);
length += SkScalarDiv(angle, SkScalarHalf(SK_ScalarPI));
step += angle;
}
path.close();
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(0xFF007700);
canvas->drawPath(path, paint);
}
void SkPathStroker::quad_to(const SkPoint pts[3],
const SkVector& normalAB, const SkVector& unitNormalAB,
SkVector* normalBC, SkVector* unitNormalBC,
int subDivide) {
if (!set_normal_unitnormal(pts[1], pts[2], fRadius,
normalBC, unitNormalBC)) {
// pts[1] nearly equals pts[2], so just draw a line to pts[2]
this->line_to(pts[2], normalAB);
*normalBC = normalAB;
*unitNormalBC = unitNormalAB;
return;
}
if (--subDivide >= 0 && normals_too_curvy(unitNormalAB, *unitNormalBC)) {
SkPoint tmp[5];
SkVector norm, unit;
SkChopQuadAtHalf(pts, tmp);
this->quad_to(&tmp[0], normalAB, unitNormalAB, &norm, &unit, subDivide);
this->quad_to(&tmp[2], norm, unit, normalBC, unitNormalBC, subDivide);
} else {
SkVector normalB;
normalB = pts[2] - pts[0];
normalB.rotateCCW();
SkScalar dot = SkPoint::DotProduct(unitNormalAB, *unitNormalBC);
SkAssertResult(normalB.setLength(SkScalarDiv(fRadius,
SkScalarSqrt((SK_Scalar1 + dot)/2))));
fOuter.quadTo( pts[1].fX + normalB.fX, pts[1].fY + normalB.fY,
pts[2].fX + normalBC->fX, pts[2].fY + normalBC->fY);
fInner.quadTo( pts[1].fX - normalB.fX, pts[1].fY - normalB.fY,
pts[2].fX - normalBC->fX, pts[2].fY - normalBC->fY);
}
}
void onDrawContent(SkCanvas* canvas) override {
SkScalar angle = fAngle*SK_ScalarPI + SkScalarHalf(SK_ScalarPI);
SkPoint center = SkPoint::Make(SkScalarHalf(this->width()), SkScalarHalf(this->height()));
SkScalar length = 5;
SkScalar step = angle;
SkPath path;
path.moveTo(center);
while (length < (SkScalarHalf(SkMinScalar(this->width(), this->height())) - 10.f))
{
SkPoint rp = SkPoint::Make(length*SkScalarCos(step) + center.fX,
length*SkScalarSin(step) + center.fY);
path.lineTo(rp);
length += SkScalarDiv(angle, SkScalarHalf(SK_ScalarPI));
step += angle;
}
path.close();
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(0xFF007700);
canvas->drawPath(path, paint);
}
void SkListView::ensureVisibleRowCount()
{
SkScalar height = this->height();
int n = 0;
if (height > 0)
{
n = 1;
height -= fHeights[kSelected_Height];
if (height > 0)
{
SkScalar count = SkScalarDiv(height, fHeights[kNormal_Height]);
n += SkScalarFloor(count);
if (count - SkIntToScalar(n) > SK_Scalar1*3/4)
n += 1;
// SkDebugf("count %g, n %d\n", count/65536., n);
}
}
if (fVisibleRowCount != n)
{
if (fScrollBar)
fScrollBar->setShown(n);
fVisibleRowCount = n;
this->ensureSelectionIsVisible();
this->dirtyCache(kAnimCount_DirtyFlag | kAnimContent_DirtyFlag);
}
}
uint32_t GrPathUtils::quadraticPointCount(const GrPoint points[],
GrScalar tol) {
if (tol < gMinCurveTol) {
tol == gMinCurveTol;
}
GrAssert(tol > 0);
GrScalar d = points[1].distanceToLineSegmentBetween(points[0], points[2]);
if (d <= tol) {
return 1;
} else {
// Each time we subdivide, d should be cut in 4. So we need to
// subdivide x = log4(d/tol) times. x subdivisions creates 2^(x)
// points.
// 2^(log4(x)) = sqrt(x);
int temp = SkScalarCeil(SkScalarSqrt(SkScalarDiv(d, tol)));
int pow2 = GrNextPow2(temp);
// Because of NaNs & INFs we can wind up with a degenerate temp
// such that pow2 comes out negative. Also, our point generator
// will always output at least one pt.
if (pow2 < 1) {
pow2 = 1;
}
return GrMin(pow2, MAX_POINTS_PER_CURVE);
}
}
void SkPDFGraphicState::emitObject(SkWStream* stream,
const SkPDFObjNumMap& objNumMap,
const SkPDFSubstituteMap& substitutes) {
SkAutoTUnref<SkPDFDict> dict(SkNEW_ARGS(SkPDFDict, ("ExtGState")));
dict->insertName("Type", "ExtGState");
SkScalar alpha = SkScalarDiv(fAlpha, 0xFF);
dict->insertScalar("CA", alpha);
dict->insertScalar("ca", alpha);
SkPaint::Cap strokeCap = (SkPaint::Cap)fStrokeCap;
SkPaint::Join strokeJoin = (SkPaint::Join)fStrokeJoin;
SkXfermode::Mode xferMode = (SkXfermode::Mode)fMode;
SK_COMPILE_ASSERT(SkPaint::kButt_Cap == 0, paint_cap_mismatch);
SK_COMPILE_ASSERT(SkPaint::kRound_Cap == 1, paint_cap_mismatch);
SK_COMPILE_ASSERT(SkPaint::kSquare_Cap == 2, paint_cap_mismatch);
SK_COMPILE_ASSERT(SkPaint::kCapCount == 3, paint_cap_mismatch);
SkASSERT(strokeCap >= 0 && strokeCap <= 2);
dict->insertInt("LC", strokeCap);
SK_COMPILE_ASSERT(SkPaint::kMiter_Join == 0, paint_join_mismatch);
SK_COMPILE_ASSERT(SkPaint::kRound_Join == 1, paint_join_mismatch);
SK_COMPILE_ASSERT(SkPaint::kBevel_Join == 2, paint_join_mismatch);
SK_COMPILE_ASSERT(SkPaint::kJoinCount == 3, paint_join_mismatch);
SkASSERT(strokeJoin >= 0 && strokeJoin <= 2);
dict->insertInt("LJ", strokeJoin);
dict->insertScalar("LW", fStrokeWidth);
dict->insertScalar("ML", fStrokeMiter);
dict->insertBool("SA", true); // SA = Auto stroke adjustment.
dict->insertName("BM", as_blend_mode(xferMode));
dict->emitObject(stream, objNumMap, substitutes);
}
uint32_t GrPathUtils::cubicPointCount(const GrPoint points[],
GrScalar tol) {
if (tol < gMinCurveTol) {
tol == gMinCurveTol;
}
GrAssert(tol > 0);
GrScalar d = GrMax(
points[1].distanceToLineSegmentBetweenSqd(points[0], points[3]),
points[2].distanceToLineSegmentBetweenSqd(points[0], points[3]));
d = SkScalarSqrt(d);
if (d <= tol) {
return 1;
} else {
int temp = SkScalarCeil(SkScalarSqrt(SkScalarDiv(d, tol)));
int pow2 = GrNextPow2(temp);
// Because of NaNs & INFs we can wind up with a degenerate temp
// such that pow2 comes out negative. Also, our point generator
// will always output at least one pt.
if (pow2 < 1) {
pow2 = 1;
}
return GrMin(pow2, MAX_POINTS_PER_CURVE);
}
}
static void normalize(SkScalar v[3]) {
SkScalar mag = SkScalarSquare(v[0]) + SkScalarSquare(v[1]) + SkScalarSquare(v[2]);
mag = SkScalarSqrt(mag);
for (int i = 0; i < 3; i++) {
v[i] = SkScalarDiv(v[i], mag);
}
}
SkScalar SkInterpolatorBase::ComputeRelativeT(SkMSec time, SkMSec prevTime,
SkMSec nextTime, const SkScalar blend[4]) {
SkASSERT(time > prevTime && time < nextTime);
SkScalar t = SkScalarDiv((SkScalar)(time - prevTime),
(SkScalar)(nextTime - prevTime));
return blend ?
SkUnitCubicInterp(t, blend[0], blend[1], blend[2], blend[3]) : t;
}
SkScalar SkPerlinNoiseShader::PerlinNoiseShaderContext::calculateTurbulenceValueForPoint(
int channel, StitchData& stitchData, const SkPoint& point) const {
const SkPerlinNoiseShader& perlinNoiseShader = static_cast<const SkPerlinNoiseShader&>(fShader);
if (perlinNoiseShader.fStitchTiles) {
// Set up TurbulenceInitial stitch values.
stitchData = fPaintingData->fStitchDataInit;
}
SkScalar turbulenceFunctionResult = 0;
SkPoint noiseVector(SkPoint::Make(SkScalarMul(point.x(), fPaintingData->fBaseFrequency.fX),
SkScalarMul(point.y(), fPaintingData->fBaseFrequency.fY)));
SkScalar ratio = SK_Scalar1;
for (int octave = 0; octave < perlinNoiseShader.fNumOctaves; ++octave) {
SkScalar noise = noise2D(channel, stitchData, noiseVector);
turbulenceFunctionResult += SkScalarDiv(
(perlinNoiseShader.fType == kFractalNoise_Type) ? noise : SkScalarAbs(noise), ratio);
noiseVector.fX *= 2;
noiseVector.fY *= 2;
ratio *= 2;
if (perlinNoiseShader.fStitchTiles) {
// Update stitch values
stitchData.fWidth *= 2;
stitchData.fWrapX = stitchData.fWidth + kPerlinNoise;
stitchData.fHeight *= 2;
stitchData.fWrapY = stitchData.fHeight + kPerlinNoise;
}
}
// The value of turbulenceFunctionResult comes from ((turbulenceFunctionResult) + 1) / 2
// by fractalNoise and (turbulenceFunctionResult) by turbulence.
if (perlinNoiseShader.fType == kFractalNoise_Type) {
turbulenceFunctionResult =
SkScalarMul(turbulenceFunctionResult, SK_ScalarHalf) + SK_ScalarHalf;
}
if (channel == 3) { // Scale alpha by paint value
turbulenceFunctionResult = SkScalarMul(turbulenceFunctionResult,
SkScalarDiv(SkIntToScalar(getPaintAlpha()), SkIntToScalar(255)));
}
// Clamp result
return SkScalarPin(turbulenceFunctionResult, 0, SK_Scalar1);
}
bool SkSliderView::onClick(Click* click)
{
if (fMax)
{
SkScalar percent = SkScalarDiv(click->fCurr.fX + SK_Scalar1, this->width() - SK_Scalar1*2);
percent = SkMaxScalar(0, SkMinScalar(percent, SK_Scalar1));
this->setValue(SkScalarRound(percent * fMax));
return true;
}
return false;
}
SkBBoxHierarchy* SkPicture::createBBoxHierarchy() const {
// These values were empirically determined to produce reasonable
// performance in most cases.
static const int kRTreeMinChildren = 6;
static const int kRTreeMaxChildren = 11;
SkScalar aspectRatio = SkScalarDiv(SkIntToScalar(fWidth),
SkIntToScalar(fHeight));
return SkRTree::Create(kRTreeMinChildren, kRTreeMaxChildren,
aspectRatio);
}