bool SkDrawColor::setProperty(int index, SkScriptValue& value) {
SkASSERT(value.fType == SkType_Float);
SkScalar scalar = value.fOperand.fScalar;
switch (index) {
case SK_PROPERTY(alpha):
uint8_t alpha;
#ifdef SK_SCALAR_IS_FLOAT
alpha = scalar == SK_Scalar1 ? 255 : SkToU8((U8CPU) (scalar * 256));
#else
alpha = SkToU8((scalar - (scalar >= SK_ScalarHalf)) >> 8);
#endif
color = SkColorSetARGB(alpha, SkColorGetR(color),
SkColorGetG(color), SkColorGetB(color));
break;
case SK_PROPERTY(blue):
scalar = SkScalarClampMax(scalar, 255 * SK_Scalar1);
color = SkColorSetARGB(SkColorGetA(color), SkColorGetR(color),
SkColorGetG(color), SkToU8((U8CPU) scalar));
break;
case SK_PROPERTY(green):
scalar = SkScalarClampMax(scalar, 255 * SK_Scalar1);
color = SkColorSetARGB(SkColorGetA(color), SkColorGetR(color),
SkToU8((U8CPU) scalar), SkColorGetB(color));
break;
case SK_PROPERTY(hue):
fHue = scalar;//RGB_to_HSV(color, kGetHue);
fDirty = true;
break;
case SK_PROPERTY(red):
scalar = SkScalarClampMax(scalar, 255 * SK_Scalar1);
color = SkColorSetARGB(SkColorGetA(color), SkToU8((U8CPU) scalar),
SkColorGetG(color), SkColorGetB(color));
break;
case SK_PROPERTY(saturation):
fSaturation = scalar;//RGB_to_HSV(color, kGetSaturation);
fDirty = true;
break;
case SK_PROPERTY(value):
fValue = scalar;//RGB_to_HSV(color, kGetValue);
fDirty = true;
break;
default:
SkASSERT(0);
return false;
}
return true;
}
inline SkPMColor cubicBlend(const SkScalar c[16], SkScalar t, SkPMColor c0, SkPMColor c1, SkPMColor c2, SkPMColor c3) {
SkScalar t2 = t * t, t3 = t2 * t;
SkScalar cc[4];
// FIXME: For the fractx case, this should be refactored out of this function.
cc[0] = c[0] + SkScalarMul(c[1], t) + SkScalarMul(c[2], t2) + SkScalarMul(c[3], t3);
cc[1] = c[4] + SkScalarMul(c[5], t) + SkScalarMul(c[6], t2) + SkScalarMul(c[7], t3);
cc[2] = c[8] + SkScalarMul(c[9], t) + SkScalarMul(c[10], t2) + SkScalarMul(c[11], t3);
cc[3] = c[12] + SkScalarMul(c[13], t) + SkScalarMul(c[14], t2) + SkScalarMul(c[15], t3);
SkScalar a = SkScalarClampMax(SkScalarMul(cc[0], SkGetPackedA32(c0)) + SkScalarMul(cc[1], SkGetPackedA32(c1)) + SkScalarMul(cc[2], SkGetPackedA32(c2)) + SkScalarMul(cc[3], SkGetPackedA32(c3)), 255);
SkScalar r = SkScalarMul(cc[0], SkGetPackedR32(c0)) + SkScalarMul(cc[1], SkGetPackedR32(c1)) + SkScalarMul(cc[2], SkGetPackedR32(c2)) + SkScalarMul(cc[3], SkGetPackedR32(c3));
SkScalar g = SkScalarMul(cc[0], SkGetPackedG32(c0)) + SkScalarMul(cc[1], SkGetPackedG32(c1)) + SkScalarMul(cc[2], SkGetPackedG32(c2)) + SkScalarMul(cc[3], SkGetPackedG32(c3));
SkScalar b = SkScalarMul(cc[0], SkGetPackedB32(c0)) + SkScalarMul(cc[1], SkGetPackedB32(c1)) + SkScalarMul(cc[2], SkGetPackedB32(c2)) + SkScalarMul(cc[3], SkGetPackedB32(c3));
return SkPackARGB32(SkScalarRoundToInt(a),
SkScalarRoundToInt(SkScalarClampMax(r, a)),
SkScalarRoundToInt(SkScalarClampMax(g, a)),
SkScalarRoundToInt(SkScalarClampMax(b, a)));
}
bool SkPatchUtils::getVertexData(SkPatchUtils::VertexData* data, const SkPoint cubics[12],
const SkColor colors[4], const SkPoint texCoords[4], int lodX, int lodY) {
if (lodX < 1 || lodY < 1 || NULL == cubics || NULL == data) {
return false;
}
// check for overflow in multiplication
const int64_t lodX64 = (lodX + 1),
lodY64 = (lodY + 1),
mult64 = lodX64 * lodY64;
if (mult64 > SK_MaxS32) {
return false;
}
data->fVertexCount = SkToS32(mult64);
// it is recommended to generate draw calls of no more than 65536 indices, so we never generate
// more than 60000 indices. To accomplish that we resize the LOD and vertex count
if (data->fVertexCount > 10000 || lodX > 200 || lodY > 200) {
SkScalar weightX = static_cast<SkScalar>(lodX) / (lodX + lodY);
SkScalar weightY = static_cast<SkScalar>(lodY) / (lodX + lodY);
// 200 comes from the 100 * 2 which is the max value of vertices because of the limit of
// 60000 indices ( sqrt(60000 / 6) that comes from data->fIndexCount = lodX * lodY * 6)
lodX = static_cast<int>(weightX * 200);
lodY = static_cast<int>(weightY * 200);
data->fVertexCount = (lodX + 1) * (lodY + 1);
}
data->fIndexCount = lodX * lodY * 6;
data->fPoints = SkNEW_ARRAY(SkPoint, data->fVertexCount);
data->fIndices = SkNEW_ARRAY(uint16_t, data->fIndexCount);
// if colors is not null then create array for colors
SkPMColor colorsPM[kNumCorners];
if (NULL != colors) {
// premultiply colors to avoid color bleeding.
for (int i = 0; i < kNumCorners; i++) {
colorsPM[i] = SkPreMultiplyColor(colors[i]);
}
data->fColors = SkNEW_ARRAY(uint32_t, data->fVertexCount);
}
// if texture coordinates are not null then create array for them
if (NULL != texCoords) {
data->fTexCoords = SkNEW_ARRAY(SkPoint, data->fVertexCount);
}
SkPoint pts[kNumPtsCubic];
SkPatchUtils::getBottomCubic(cubics, pts);
FwDCubicEvaluator fBottom(pts);
SkPatchUtils::getTopCubic(cubics, pts);
FwDCubicEvaluator fTop(pts);
SkPatchUtils::getLeftCubic(cubics, pts);
FwDCubicEvaluator fLeft(pts);
SkPatchUtils::getRightCubic(cubics, pts);
FwDCubicEvaluator fRight(pts);
fBottom.restart(lodX);
fTop.restart(lodX);
SkScalar u = 0.0f;
int stride = lodY + 1;
for (int x = 0; x <= lodX; x++) {
SkPoint bottom = fBottom.next(), top = fTop.next();
fLeft.restart(lodY);
fRight.restart(lodY);
SkScalar v = 0.f;
for (int y = 0; y <= lodY; y++) {
int dataIndex = x * (lodY + 1) + y;
SkPoint left = fLeft.next(), right = fRight.next();
SkPoint s0 = SkPoint::Make((1.0f - v) * top.x() + v * bottom.x(),
(1.0f - v) * top.y() + v * bottom.y());
SkPoint s1 = SkPoint::Make((1.0f - u) * left.x() + u * right.x(),
(1.0f - u) * left.y() + u * right.y());
SkPoint s2 = SkPoint::Make(
(1.0f - v) * ((1.0f - u) * fTop.getCtrlPoints()[0].x()
+ u * fTop.getCtrlPoints()[3].x())
+ v * ((1.0f - u) * fBottom.getCtrlPoints()[0].x()
+ u * fBottom.getCtrlPoints()[3].x()),
(1.0f - v) * ((1.0f - u) * fTop.getCtrlPoints()[0].y()
+ u * fTop.getCtrlPoints()[3].y())
+ v * ((1.0f - u) * fBottom.getCtrlPoints()[0].y()
+ u * fBottom.getCtrlPoints()[3].y()));
data->fPoints[dataIndex] = s0 + s1 - s2;
if (NULL != colors) {
uint8_t a = uint8_t(bilerp(u, v,
SkScalar(SkColorGetA(colorsPM[kTopLeft_Corner])),
SkScalar(SkColorGetA(colorsPM[kTopRight_Corner])),
SkScalar(SkColorGetA(colorsPM[kBottomLeft_Corner])),
SkScalar(SkColorGetA(colorsPM[kBottomRight_Corner]))));
uint8_t r = uint8_t(bilerp(u, v,
SkScalar(SkColorGetR(colorsPM[kTopLeft_Corner])),
SkScalar(SkColorGetR(colorsPM[kTopRight_Corner])),
SkScalar(SkColorGetR(colorsPM[kBottomLeft_Corner])),
SkScalar(SkColorGetR(colorsPM[kBottomRight_Corner]))));
uint8_t g = uint8_t(bilerp(u, v,
SkScalar(SkColorGetG(colorsPM[kTopLeft_Corner])),
SkScalar(SkColorGetG(colorsPM[kTopRight_Corner])),
SkScalar(SkColorGetG(colorsPM[kBottomLeft_Corner])),
SkScalar(SkColorGetG(colorsPM[kBottomRight_Corner]))));
uint8_t b = uint8_t(bilerp(u, v,
SkScalar(SkColorGetB(colorsPM[kTopLeft_Corner])),
SkScalar(SkColorGetB(colorsPM[kTopRight_Corner])),
SkScalar(SkColorGetB(colorsPM[kBottomLeft_Corner])),
SkScalar(SkColorGetB(colorsPM[kBottomRight_Corner]))));
data->fColors[dataIndex] = SkPackARGB32(a,r,g,b);
}
if (NULL != texCoords) {
data->fTexCoords[dataIndex] = SkPoint::Make(
bilerp(u, v, texCoords[kTopLeft_Corner].x(),
texCoords[kTopRight_Corner].x(),
texCoords[kBottomLeft_Corner].x(),
texCoords[kBottomRight_Corner].x()),
bilerp(u, v, texCoords[kTopLeft_Corner].y(),
texCoords[kTopRight_Corner].y(),
texCoords[kBottomLeft_Corner].y(),
texCoords[kBottomRight_Corner].y()));
}
if(x < lodX && y < lodY) {
int i = 6 * (x * lodY + y);
data->fIndices[i] = x * stride + y;
data->fIndices[i + 1] = x * stride + 1 + y;
data->fIndices[i + 2] = (x + 1) * stride + 1 + y;
data->fIndices[i + 3] = data->fIndices[i];
data->fIndices[i + 4] = data->fIndices[i + 2];
data->fIndices[i + 5] = (x + 1) * stride + y;
}
v = SkScalarClampMax(v + 1.f / lodY, 1);
}
u = SkScalarClampMax(u + 1.f / lodX, 1);
}
return true;
}
