SkShader::Context::Context(const SkShader& shader, const ContextRec& rec)
: fShader(shader), fCTM(*rec.fMatrix)
{
// Because the context parameters must be valid at this point, we know that the matrix is
// invertible.
SkAssertResult(fShader.computeTotalInverse(rec, &fTotalInverse));
fTotalInverseClass = (uint8_t)ComputeMatrixClass(fTotalInverse);
fPaintAlpha = rec.fPaint->getAlpha();
}
bool SkShader::setContext(const SkBitmap& device,
const SkPaint& paint,
const SkMatrix& matrix) {
SkASSERT(!this->setContextHasBeenCalled());
const SkMatrix* m = &matrix;
SkMatrix total;
fPaintAlpha = paint.getAlpha();
if (this->hasLocalMatrix()) {
total.setConcat(matrix, this->getLocalMatrix());
m = &total;
}
if (m->invert(&fTotalInverse)) {
fTotalInverseClass = (uint8_t)ComputeMatrixClass(fTotalInverse);
SkDEBUGCODE(fInSetContext = true;)
return true;
bool SkShader::setContext(const SkBitmap& device,
const SkPaint& paint,
const SkMatrix& matrix) {
const SkMatrix* m = &matrix;
SkMatrix total;
fDeviceConfig = SkToU8(device.getConfig());
fPaintAlpha = paint.getAlpha();
if (fLocalMatrix) {
total.setConcat(matrix, *fLocalMatrix);
m = &total;
}
if (m->invert(&fTotalInverse)) {
fTotalInverseClass = (uint8_t)ComputeMatrixClass(fTotalInverse);
return true;
}
return false;
}
