return SkString("arithmode");
}
- virtual SkISize onISize() { return SkISize::Make(640, 480); }
+ virtual SkISize onISize() { return SkISize::Make(640, 572); }
virtual void onDraw(SkCanvas* canvas) {
SkBitmap src = make_src();
k += 4;
y += SkIntToScalar(src.height() + 12);
}
+
+ // Draw two special cases to test enforcePMColor. In these cases, we
+ // draw the dst bitmap twice, the first time it is halved and inverted,
+ // leading to invalid premultiplied colors. If we enforcePMColor, these
+ // invalid values should be clamped, and will not contribute to the
+ // second draw.
+ for (int i = 0; i < 2; i++) {
+ const bool enforcePMColor = (i == 0);
+ SkScalar x = gap;
+ canvas->drawBitmap(dst, x, y, nullptr);
+ x += gap;
+ SkRect rect = SkRect::MakeXYWH(x, y, SkIntToScalar(WW), SkIntToScalar(HH));
+ canvas->saveLayer(&rect, nullptr);
+ SkXfermode* xfer1 = SkArithmeticMode::Create(0, -one / 2, 0, 1, enforcePMColor);
+ SkPaint paint1;
+ paint1.setXfermode(xfer1)->unref();
+ canvas->drawBitmap(dst, x, y, &paint1);
+ SkXfermode* xfer2 = SkArithmeticMode::Create(0, one / 2, -one, 1);
+ SkPaint paint2;
+ paint2.setXfermode(xfer2)->unref();
+ canvas->drawBitmap(dst, x, y, &paint2);
+ canvas->restore();
+ x += gap;
+
+ // Label
+ SkPaint paint;
+ paint.setTextSize(SkIntToScalar(24));
+ paint.setAntiAlias(true);
+ sk_tool_utils::set_portable_typeface(&paint);
+ SkString str(enforcePMColor ? "enforcePM" : "no enforcePM");
+ canvas->drawText(str.c_str(), str.size(), x, y + paint.getTextSize(), paint);
+
+ y += SkIntToScalar(src.height() + 12);
+ }
}
private:
class GLArithmeticFP : public GrGLFragmentProcessor {
public:
- GLArithmeticFP(const GrProcessor&) : fEnforcePMColor(true) {}
+ GLArithmeticFP(const GrArithmeticFP& arithmeticFP)
+ : fEnforcePMColor(arithmeticFP.enforcePMColor()) {}
~GLArithmeticFP() override {}
class GLArithmeticXP : public GrGLXferProcessor {
public:
- GLArithmeticXP(const GrProcessor&)
- : fEnforcePMColor(true) {
+ GLArithmeticXP(const ArithmeticXP& arithmeticXP)
+ : fEnforcePMColor(arithmeticXP.enforcePMColor()) {
}
~GLArithmeticXP() override {}
///////////////////////////////////////////////////////////////////////////////
GrArithmeticXPFactory::GrArithmeticXPFactory(float k1, float k2, float k3, float k4,
- bool enforcePMColor)
+ bool enforcePMColor)
: fK1(k1), fK2(k2), fK3(k3), fK4(k4), fEnforcePMColor(enforcePMColor) {
this->initClassID<GrArithmeticXPFactory>();
}