void onDrawContent(SkCanvas* canvas) override {
fLightAngle += 0.015f;
fColorFactor += 0.01f;
if (fColorFactor > 1.0f) {
fColorFactor = 0.0f;
}
SkLightingShader::Light light;
light.fColor = SkColor3f::Make(1.0f, 1.0f, fColorFactor);
light.fDirection.fX = SkScalarSin(fLightAngle)*SkScalarSin(SK_ScalarPI*0.25f);
light.fDirection.fY = SkScalarCos(fLightAngle)*SkScalarSin(SK_ScalarPI*0.25f);
light.fDirection.fZ = SkScalarCos(SK_ScalarPI*0.25f);
fShader.reset(SkLightingShader::Create(fDiffuseBitmap, fNormalBitmap,
light, fAmbientColor, nullptr));
SkPaint paint;
paint.setShader(fShader);
paint.setColor(SK_ColorBLACK);
SkRect r = SkRect::MakeWH((SkScalar)fDiffuseBitmap.width(),
(SkScalar)fDiffuseBitmap.height());
canvas->drawRect(r, paint);
// so we're constantly updating
this->inval(NULL);
}
static SkPoint3 GetDistantDirection() {
static SkScalar azimuthRad = SkDegreesToRadians(SkIntToScalar(225));
static SkScalar elevationRad = SkDegreesToRadians(SkIntToScalar(5));
static SkPoint3 distantDirection = SkPoint3::Make(SkScalarMul(SkScalarCos(azimuthRad),
SkScalarCos(elevationRad)),
SkScalarMul(SkScalarSin(azimuthRad),
SkScalarCos(elevationRad)),
SkScalarSin(elevationRad));
return distantDirection;
}
static const SkLightingShader::Lights* create_lights(SkScalar angle, SkScalar blue) {
const SkVector3 dir = SkVector3::Make(SkScalarSin(angle)*SkScalarSin(SK_ScalarPI*0.25f),
SkScalarCos(angle)*SkScalarSin(SK_ScalarPI*0.25f),
SkScalarCos(SK_ScalarPI*0.25f));
SkLightingShader::Lights::Builder builder;
builder.add(SkLight(SkColor3f::Make(1.0f, 1.0f, blue), dir));
builder.add(SkLight(SkColor3f::Make(0.1f, 0.1f, 0.1f)));
return builder.finish();
}
static sk_sp<SkLights> create_lights(SkScalar angle, SkScalar blue) {
const SkVector3 dir = SkVector3::Make(SkScalarSin(angle)*SkScalarSin(SK_ScalarPI*0.25f),
SkScalarCos(angle)*SkScalarSin(SK_ScalarPI*0.25f),
SkScalarCos(SK_ScalarPI*0.25f));
SkLights::Builder builder;
builder.add(SkLights::Light::MakeDirectional(SkColor3f::Make(1.0f, 1.0f, blue), dir));
builder.setAmbientLightColor(SkColor3f::Make(0.1f, 0.1f, 0.1f));
return builder.finish();
}
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 onDraw(SkCanvas* canvas) override {
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);
for (int i = 0; i < fNumSteps && length < (SkScalarHalf(size) - 10.f); ++i) {
SkPoint rp = SkPoint::Make(length*SkScalarCos(step) + center.fX,
length*SkScalarSin(step) + center.fY);
path.lineTo(rp);
length += angle / SkScalarHalf(SK_ScalarPI);
step += angle;
}
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(sk_tool_utils::color_to_565(0xFF007700));
canvas->drawPath(path, paint);
}
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);
}
static SkScalar drawCell(SkCanvas* canvas, SkXfermode* mode, SkAlpha a0, SkAlpha a1)
{
SkPaint paint;
paint.setAntiAlias(true);
SkRect r = SkRect::MakeWH(W, H);
r.inset(W/10, H/10);
paint.setColor(SK_ColorBLUE);
paint.setAlpha(a0);
canvas->drawOval(r, paint);
paint.setColor(SK_ColorRED);
paint.setAlpha(a1);
paint.setXfermode(mode);
for (int angle = 0; angle < 24; ++angle)
{
SkScalar x = SkScalarCos(SkIntToScalar(angle) * (SK_ScalarPI * 2) / 24) * gWidth;
SkScalar y = SkScalarSin(SkIntToScalar(angle) * (SK_ScalarPI * 2) / 24) * gHeight;
paint.setStrokeWidth(SK_Scalar1 * angle * 2 / 24);
canvas->drawLine(W/2, H/2, W/2 + x, H/2 + y, paint);
}
return H;
}
LightingView() {
SkString diffusePath = GetResourcePath("brickwork-texture.jpg");
SkImageDecoder::DecodeFile(diffusePath.c_str(), &fDiffuseBitmap);
SkString normalPath = GetResourcePath("brickwork_normal-map.jpg");
SkImageDecoder::DecodeFile(normalPath.c_str(), &fNormalBitmap);
fLightAngle = 0.0f;
fColorFactor = 0;
LightingShader::Light light;
light.fColor = SkColorSetRGB(0xff, 0xff, 0xff);
light.fDirection.fX = SkScalarSin(fLightAngle)*SkScalarSin(SK_ScalarPI*0.25f);
light.fDirection.fY = SkScalarCos(fLightAngle)*SkScalarSin(SK_ScalarPI*0.25f);
light.fDirection.fZ = SkScalarCos(SK_ScalarPI*0.25f);
SkColor ambient = SkColorSetRGB(0x1f, 0x1f, 0x1f);
fShader.reset(SkNEW_ARGS(LightingShader, (fDiffuseBitmap, fNormalBitmap, light, ambient)));
}
/* Solve coeff(t) == 0, returning the number of roots that
lie withing 0 < t < 1.
coeff[0]t^3 + coeff[1]t^2 + coeff[2]t + coeff[3]
Eliminates repeated roots (so that all tValues are distinct, and are always
in increasing order.
*/
static int solve_cubic_poly(const SkScalar coeff[4], SkScalar tValues[3]) {
if (SkScalarNearlyZero(coeff[0])) { // we're just a quadratic
return SkFindUnitQuadRoots(coeff[1], coeff[2], coeff[3], tValues);
}
SkScalar a, b, c, Q, R;
{
SkASSERT(coeff[0] != 0);
SkScalar inva = SkScalarInvert(coeff[0]);
a = coeff[1] * inva;
b = coeff[2] * inva;
c = coeff[3] * inva;
}
Q = (a*a - b*3) / 9;
R = (2*a*a*a - 9*a*b + 27*c) / 54;
SkScalar Q3 = Q * Q * Q;
SkScalar R2MinusQ3 = R * R - Q3;
SkScalar adiv3 = a / 3;
SkScalar* roots = tValues;
SkScalar r;
if (R2MinusQ3 < 0) { // we have 3 real roots
SkScalar theta = SkScalarACos(R / SkScalarSqrt(Q3));
SkScalar neg2RootQ = -2 * SkScalarSqrt(Q);
r = neg2RootQ * SkScalarCos(theta/3) - adiv3;
if (is_unit_interval(r)) {
*roots++ = r;
}
r = neg2RootQ * SkScalarCos((theta + 2*SK_ScalarPI)/3) - adiv3;
if (is_unit_interval(r)) {
*roots++ = r;
}
r = neg2RootQ * SkScalarCos((theta - 2*SK_ScalarPI)/3) - adiv3;
if (is_unit_interval(r)) {
*roots++ = r;
}
SkDEBUGCODE(test_collaps_duplicates();)
LightingView() {
SkString diffusePath = GetResourcePath("brickwork-texture.jpg");
SkImageDecoder::DecodeFile(diffusePath.c_str(), &fDiffuseBitmap);
SkString normalPath = GetResourcePath("brickwork_normal-map.jpg");
SkImageDecoder::DecodeFile(normalPath.c_str(), &fNormalBitmap);
fLightAngle = 0.0f;
fColorFactor = 0.0f;
SkLightingShader::Light light;
light.fColor = SkColor3f::Make(1.0f, 1.0f, 1.0f);
light.fDirection.fX = SkScalarSin(fLightAngle)*SkScalarSin(SK_ScalarPI*0.25f);
light.fDirection.fY = SkScalarCos(fLightAngle)*SkScalarSin(SK_ScalarPI*0.25f);
light.fDirection.fZ = SkScalarCos(SK_ScalarPI*0.25f);
fAmbientColor = SkColor3f::Make(0.1f, 0.1f, 0.1f);
fShader.reset(SkLightingShader::Create(fDiffuseBitmap, fNormalBitmap,
light, fAmbientColor, nullptr));
}
SkPath make_star(const SkRect& bounds, int numPts, int step) {
SkPath path;
path.setFillType(SkPath::kEvenOdd_FillType);
path.moveTo(0,-1);
for (int i = 1; i < numPts; ++i) {
int idx = i*step;
SkScalar theta = idx * 2*SK_ScalarPI/numPts + SK_ScalarPI/2;
SkScalar x = SkScalarCos(theta);
SkScalar y = -SkScalarSin(theta);
path.lineTo(x, y);
}
path.transform(SkMatrix::MakeRectToRect(path.getBounds(), bounds, SkMatrix::kFill_ScaleToFit));
return path;
}
virtual void onDraw(SkCanvas* canvas) {
if (!fInitialized) {
make_bitmap();
fInitialized = true;
}
canvas->clear(0xFF101010);
SkPaint checkPaint;
checkPaint.setColor(0xFF202020);
for (int y = 0; y < HEIGHT; y += 16) {
for (int x = 0; x < WIDTH; x += 16) {
canvas->save();
canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
canvas->drawRect(SkRect::MakeXYWH(8, 0, 8, 8), checkPaint);
canvas->drawRect(SkRect::MakeXYWH(0, 8, 8, 8), checkPaint);
canvas->restore();
}
}
SkPoint3 pointLocation(0, 0, SkIntToScalar(10));
SkScalar azimuthRad = SkDegreesToRadians(SkIntToScalar(225));
SkScalar elevationRad = SkDegreesToRadians(SkIntToScalar(5));
SkPoint3 distantDirection(SkScalarMul(SkScalarCos(azimuthRad), SkScalarCos(elevationRad)),
SkScalarMul(SkScalarSin(azimuthRad), SkScalarCos(elevationRad)),
SkScalarSin(elevationRad));
SkPoint3 spotLocation(SkIntToScalar(-10), SkIntToScalar(-10), SkIntToScalar(20));
SkPoint3 spotTarget(SkIntToScalar(40), SkIntToScalar(40), 0);
SkScalar spotExponent = SK_Scalar1;
SkScalar cutoffAngle = SkIntToScalar(15);
SkScalar kd = SkIntToScalar(2);
SkScalar ks = SkIntToScalar(1);
SkScalar shininess = SkIntToScalar(8);
SkScalar surfaceScale = SkIntToScalar(1);
SkColor white(0xFFFFFFFF);
SkPaint paint;
SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(20, 10, 60, 65));
int y = 0;
for (int i = 0; i < 2; i++) {
const SkImageFilter::CropRect* cr = (i == 0) ? NULL : &cropRect;
paint.setImageFilter(SkLightingImageFilter::CreatePointLitDiffuse(pointLocation, white, surfaceScale, kd, NULL, cr))->unref();
drawClippedBitmap(canvas, paint, 0, y);
paint.setImageFilter(SkLightingImageFilter::CreateDistantLitDiffuse(distantDirection, white, surfaceScale, kd, NULL, cr))->unref();
drawClippedBitmap(canvas, paint, 110, y);
paint.setImageFilter(SkLightingImageFilter::CreateSpotLitDiffuse(spotLocation, spotTarget, spotExponent, cutoffAngle, white, surfaceScale, kd, NULL, cr))->unref();
drawClippedBitmap(canvas, paint, 220, y);
y += 110;
paint.setImageFilter(SkLightingImageFilter::CreatePointLitSpecular(pointLocation, white, surfaceScale, ks, shininess, NULL, cr))->unref();
drawClippedBitmap(canvas, paint, 0, y);
paint.setImageFilter(SkLightingImageFilter::CreateDistantLitSpecular(distantDirection, white, surfaceScale, ks, shininess, NULL, cr))->unref();
drawClippedBitmap(canvas, paint, 110, y);
paint.setImageFilter(SkLightingImageFilter::CreateSpotLitSpecular(spotLocation, spotTarget, spotExponent, cutoffAngle, white, surfaceScale, ks, shininess, NULL, cr))->unref();
drawClippedBitmap(canvas, paint, 220, y);
y += 110;
}
}
void onOnceBeforeDraw() override {
{
SkPath* lineAnglesPath = &fPaths.push_back();
enum {
kNumAngles = 15,
kRadius = 40,
};
for (int i = 0; i < kNumAngles; ++i) {
SkScalar angle = SK_ScalarPI * SkIntToScalar(i) / kNumAngles;
SkScalar x = kRadius * SkScalarCos(angle);
SkScalar y = kRadius * SkScalarSin(angle);
lineAnglesPath->moveTo(x, y);
lineAnglesPath->lineTo(-x, -y);
}
}
{
SkPath* kindaTightQuad = &fPaths.push_back();
kindaTightQuad->moveTo(0, -10 * SK_Scalar1);
kindaTightQuad->quadTo(SkIntToScalar(100), SkIntToScalar(100), -10 * SK_Scalar1, 0);
}
{
SkPath* tightQuad = &fPaths.push_back();
tightQuad->moveTo(0, -5 * SK_Scalar1);
tightQuad->quadTo(SkIntToScalar(100), SkIntToScalar(100), -5 * SK_Scalar1, 0);
}
{
SkPath* tighterQuad = &fPaths.push_back();
tighterQuad->moveTo(0, -2 * SK_Scalar1);
tighterQuad->quadTo(SkIntToScalar(100), SkIntToScalar(100), -2 * SK_Scalar1, 0);
}
{
SkPath* unevenTighterQuad = &fPaths.push_back();
unevenTighterQuad->moveTo(0, -1 * SK_Scalar1);
SkPoint p;
p.set(-2 * SK_Scalar1 + 3 * SkIntToScalar(102) / 4, SkIntToScalar(75));
unevenTighterQuad->quadTo(SkIntToScalar(100), SkIntToScalar(100), p.fX, p.fY);
}
{
SkPath* reallyTightQuad = &fPaths.push_back();
reallyTightQuad->moveTo(0, -1 * SK_Scalar1);
reallyTightQuad->quadTo(SkIntToScalar(100), SkIntToScalar(100), -1 * SK_Scalar1, 0);
}
{
SkPath* closedQuad = &fPaths.push_back();
closedQuad->moveTo(0, -0);
closedQuad->quadTo(SkIntToScalar(100), SkIntToScalar(100), 0, 0);
}
{
SkPath* unevenClosedQuad = &fPaths.push_back();
unevenClosedQuad->moveTo(0, -0);
unevenClosedQuad->quadTo(SkIntToScalar(100), SkIntToScalar(100),
SkIntToScalar(75), SkIntToScalar(75));
}
// Two problem cases for gpu hairline renderer found by shapeops testing. These used
// to assert that the computed bounding box didn't contain all the vertices.
{
SkPath* problem1 = &fPaths.push_back();
problem1->moveTo(SkIntToScalar(4), SkIntToScalar(6));
problem1->cubicTo(SkIntToScalar(5), SkIntToScalar(6),
SkIntToScalar(5), SkIntToScalar(4),
SkIntToScalar(4), SkIntToScalar(0));
problem1->close();
}
{
SkPath* problem2 = &fPaths.push_back();
problem2->moveTo(SkIntToScalar(5), SkIntToScalar(1));
problem2->lineTo(4.32787323f, 1.67212653f);
problem2->cubicTo(2.75223875f, 3.24776125f,
3.00581908f, 4.51236057f,
3.7580452f, 4.37367964f);
problem2->cubicTo(4.66472578f, 3.888381f,
5.f, 2.875f,
5.f, 1.f);
problem2->close();
}
// Three paths that show the same bug (missing end caps)
{
// A caret (crbug.com/131770)
SkPath* bug0 = &fPaths.push_back();
bug0->moveTo(6.5f,5.5f);
bug0->lineTo(3.5f,0.5f);
bug0->moveTo(0.5f,5.5f);
bug0->lineTo(3.5f,0.5f);
}
{
// An X (crbug.com/137317)
SkPath* bug1 = &fPaths.push_back();
bug1->moveTo(1, 1);
bug1->lineTo(6, 6);
bug1->moveTo(1, 6);
bug1->lineTo(6, 1);
}
{
// A right angle (crbug.com/137465 and crbug.com/256776)
SkPath* bug2 = &fPaths.push_back();
bug2->moveTo(5.5f, 5.5f);
bug2->lineTo(5.5f, 0.5f);
bug2->lineTo(0.5f, 0.5f);
}
{
// Arc example to test imperfect truncation bug (crbug.com/295626)
static const SkScalar kRad = SkIntToScalar(2000);
static const SkScalar kStartAngle = 262.59717f;
static const SkScalar kSweepAngle = SkScalarHalf(17.188717f);
SkPath* bug = &fPaths.push_back();
// Add a circular arc
SkRect circle = SkRect::MakeLTRB(-kRad, -kRad, kRad, kRad);
bug->addArc(circle, kStartAngle, kSweepAngle);
// Now add the chord that should cap the circular arc
SkScalar cosV, sinV = SkScalarSinCos(SkDegreesToRadians(kStartAngle), &cosV);
SkPoint p0 = SkPoint::Make(kRad * cosV, kRad * sinV);
sinV = SkScalarSinCos(SkDegreesToRadians(kStartAngle + kSweepAngle), &cosV);
SkPoint p1 = SkPoint::Make(kRad * cosV, kRad * sinV);
bug->moveTo(p0);
bug->lineTo(p1);
}
}
void SkDisplayMath::executeFunction(SkDisplayable* target, int index,
SkTDArray<SkScriptValue>& parameters, SkDisplayTypes type,
SkScriptValue* scriptValue) {
if (scriptValue == NULL)
return;
SkASSERT(target == this);
SkScriptValue* array = parameters.begin();
SkScriptValue* end = parameters.end();
SkScalar input = parameters[0].fOperand.fScalar;
SkScalar scalarResult;
switch (index) {
case SK_FUNCTION(abs):
scalarResult = SkScalarAbs(input);
break;
case SK_FUNCTION(acos):
scalarResult = SkScalarACos(input);
break;
case SK_FUNCTION(asin):
scalarResult = SkScalarASin(input);
break;
case SK_FUNCTION(atan):
scalarResult = SkScalarATan2(input, SK_Scalar1);
break;
case SK_FUNCTION(atan2):
scalarResult = SkScalarATan2(input, parameters[1].fOperand.fScalar);
break;
case SK_FUNCTION(ceil):
scalarResult = SkIntToScalar(SkScalarCeil(input));
break;
case SK_FUNCTION(cos):
scalarResult = SkScalarCos(input);
break;
case SK_FUNCTION(exp):
scalarResult = SkScalarExp(input);
break;
case SK_FUNCTION(floor):
scalarResult = SkIntToScalar(SkScalarFloor(input));
break;
case SK_FUNCTION(log):
scalarResult = SkScalarLog(input);
break;
case SK_FUNCTION(max):
scalarResult = -SK_ScalarMax;
while (array < end) {
scalarResult = SkMaxScalar(scalarResult, array->fOperand.fScalar);
array++;
}
break;
case SK_FUNCTION(min):
scalarResult = SK_ScalarMax;
while (array < end) {
scalarResult = SkMinScalar(scalarResult, array->fOperand.fScalar);
array++;
}
break;
case SK_FUNCTION(pow):
// not the greatest -- but use x^y = e^(y * ln(x))
scalarResult = SkScalarLog(input);
scalarResult = SkScalarMul(parameters[1].fOperand.fScalar, scalarResult);
scalarResult = SkScalarExp(scalarResult);
break;
case SK_FUNCTION(random):
scalarResult = fRandom.nextUScalar1();
break;
case SK_FUNCTION(round):
scalarResult = SkIntToScalar(SkScalarRound(input));
break;
case SK_FUNCTION(sin):
scalarResult = SkScalarSin(input);
break;
case SK_FUNCTION(sqrt): {
SkASSERT(parameters.count() == 1);
SkASSERT(type == SkType_Float);
scalarResult = SkScalarSqrt(input);
} break;
case SK_FUNCTION(tan):
scalarResult = SkScalarTan(input);
break;
default:
SkASSERT(0);
scalarResult = SK_ScalarNaN;
}
scriptValue->fOperand.fScalar = scalarResult;
scriptValue->fType = SkType_Float;
}
static SkPoint unit_vec(int degrees) {
SkScalar rad = SkDegreesToRadians(SkIntToScalar(degrees));
return SkPoint::Make(SkScalarCos(rad), SkScalarSin(rad));
}
