void SkColorMatrix::setRGB2YUV() {
memset(fMat, 0, sizeof(fMat));
setrow(fMat + 0, kR2Y, kG2Y, kB2Y);
setrow(fMat + 5, kR2U, kG2U, kB2U);
setrow(fMat + 10, kR2V, kG2V, kB2V);
fMat[18] = SK_Scalar1;
}
void SkColorMatrix::setYUV2RGB() {
memset(fMat, 0, sizeof(fMat));
setrow(fMat + 0, SK_Scalar1, 0, kV2R);
setrow(fMat + 5, SK_Scalar1, kU2G, kV2G);
setrow(fMat + 10, SK_Scalar1, kU2B, 0);
fMat[18] = SK_Scalar1;
}
void SkColorMatrix::setSaturation(SkScalar sat) {
memset(fMat, 0, sizeof(fMat));
const SkScalar R = SkScalarMul(kHueR, SK_Scalar1 - sat);
const SkScalar G = SkScalarMul(kHueG, SK_Scalar1 - sat);
const SkScalar B = SkScalarMul(kHueB, SK_Scalar1 - sat);
setrow(fMat + 0, R + sat, G, B);
setrow(fMat + 5, R, G + sat, B);
setrow(fMat + 10, R, G, B + sat);
fMat[18] = SK_Scalar1;
}
void setcursor(int posx, int posy)
{
setrow(posy);
setcol(posx);
}
